HK40003883A - A conjugate comprising oxyntomodulin and an immunoglobulin fragment, and use thereof - Google Patents

Description

Conjugates comprising oxyntomodulin and immunoglobulin fragment and uses thereof

The application is a divisional application, the application date of the original application is 6/15/2012, the Chinese application number is 201280039781.4, the international application number is PCT/KR2012/004722, and the invention name is 'a conjugate comprising oxyntomodulin and an immunoglobulin fragment and application thereof'.

Technical Field

The present invention relates to conjugates comprising oxyntomodulin and an immunoglobulin fragment and uses thereof. More particularly, the present invention relates to a conjugate comprising an oxyntomodulin, an immunoglobulin Fc region, and a non-peptidyl polymer, wherein the conjugate is obtainable by covalently linking the oxyntomodulin to the immunoglobulin Fc region via the non-peptidyl polymer, and a pharmaceutical composition for preventing or treating obesity comprising the same.

Background

Recently, economic growth and lifestyle changes have led to changes in dietary habits. The main reasons for overweight and increased obesity rates in contemporary people are the consumption of high calorie foods such as fast food and lack of exercise. The World Health Organization (WHO) estimates that more than 10 billion people in the world are overweight, and at least 3 billion of them are clinically obese. Specifically, 250,000 people annually in europe and over 250 million people annually in the world die due to being overweight (world Health organization, Physical Activity and Health, 2004).

Overweight and obesity cause elevated blood pressure and cholesterol levels, which contribute to the development or progression of a variety of diseases such as cardiovascular disease, diabetes and arthritis, and are also the leading causes of increased incidence of arteriosclerosis, hypertension, hyperlipidemia or cardiovascular disease in children or adolescents as well as adults.

Obesity is a serious condition that causes a variety of diseases in the world. It is thought to be overcome by personal efforts, and it is also thought that obese patients lack continence. However, obesity is difficult to treat because obesity is a complex disorder involving appetite regulation and energy metabolism. In the case of obesity treatment, the efforts of obese patients should be combined to treat abnormal manifestations related to appetite regulation and energy metabolism. Various attempts have been made to develop drugs capable of treating abnormal manifestations. Based on these efforts, drugs such as Rimonabant (Rimonabant, Sanofi-Aventis), sibutramine (sibutrin, Abbott), contextual (takeda), and Orlistat (Orlistat, Roche) have been developed, but they have the drawback of severe side effects or a very weak anti-obesity effect. For example, rimonabant (Sanofi-Aventis) is reported to show side effects of central nervous disorders, sibutramine (Abbott) and contextual (takeda) to show cardiovascular side effects, and orlistat (Roche) to show weight loss of only 4kg for 1 year. Unfortunately, there are no obesity treatments that can be safely dispensed for obese patients.

Various studies have been conducted to develop obesity therapeutic agents that do not have the problems of conventional anti-obesity drugs. Recently, glucagon derivatives have received much attention. Glucagon is produced by the pancreas when the glucose level in the blood drops due to other drugs or diseases, hormones, or enzyme deficiencies. Glucagon stimulates glycogen breakdown in the liver and promotes glucose release to raise blood glucose levels to the normal range. In addition to the effect of increasing blood glucose levels, glucagon suppresses appetite and activates Hormone Sensitive Lipase (HSL) of adipocytes to promote lipolysis, thereby exhibiting an anti-obesity effect. One of the glucagon derivatives, glucagon-like peptide-1 (GLP-1), is being developed as a therapeutic agent for hyperglycemia in diabetic patients, and it functions to stimulate insulin synthesis and secretion, inhibit glucagon secretion, slow gastric emptying, increase glucose utilization, and inhibit food intake. Exenatide-4 (Exendin-4) was isolated from the toxin of lizard, shares about 50% amino acid homology with GLP-1, and is also reported to activate GLP-1 receptor, thereby relieving hyperglycemia in diabetic patients. However, anti-obesity drugs including GLP-1 are reported to show side effects such as emesis and nausea.

Thus, as an alternative to GLP-1, much attention has been focused on oxyntomodulin peptides, peptides derived from the glucagon precursor, i.e., pre-glucagon, which bind to two peptides, GLP-1 and the receptor for glucagon. Oxyntomodulin is a potent anti-obesity treatment because it inhibits food intake, promotes satiety, like GLP-1, and has lipolytic activity like glucagon.

Based on the bifunctional property of oxyntomodulin, it has been actively studied as a drug for treating obesity. For example, korean patent No. 925017 discloses a pharmaceutical composition comprising oxyntomodulin as an active ingredient for treating overweight people, which is administered by oral, parenteral, mucosal, rectal, subcutaneous or transdermal routes. However, it has been reported that such anti-obesity drugs including oxyntomodulin have a short half-life in vivo and weak therapeutic efficacy even if administered three times a day at a high dose. Therefore, various efforts have been made to improve the in vivo half-life of oxyntomodulin or the therapeutic effect on obesity by modifying it.

For example, a dual agonist oxyntomodulin peptide (Merck) was prepared as follows: replacing the L-serine at position 2 of the oxyntomodulin peptide with D-serine to increase tolerance to dipeptidyl peptidase-IV (DPP-IV); while a cholesterol moiety is attached at the C-terminus to increase blood half-life. ZP2929(Zealand) was prepared by: replacing the L-serine at position 2 with D-serine to enhance resistance to DPP-IV; (ii) substituting alanine for arginine at position 17 to enhance resistance to protease; substitution of lysine for methionine at position 27 to enhance oxidative stability; and replacing the glutamines at positions 20 and 24 with aspartic acid and alanine and the asparagine at position 28 with serine to enhance deamidation stability. However, even though the half-life of the dual agonist oxyntomodulin (Merck) is increased to show a half-life longer than that of the natural oxyntomodulin by 8 to 12 minutes, it still has a very short in vivo half-life of 1.7hr, and its administration dose is still as high as several mg/kg. Unfortunately, oxyntomodulin or its derivatives have the disadvantage of high daily dose administration due to short half-life and low potency.

Disclosure of Invention

Technical problem

Accordingly, the present inventors have made many efforts to develop a method for increasing the blood half-life of oxyntomodulin while maintaining its in vivo activity. Accordingly, the inventors found that a conjugate prepared by linking a carrier with an oxyntomodulin using a non-peptidyl polymer exhibits an improved blood half-life while maintaining in vivo activity to exhibit excellent anti-obesity effect, thereby completing the present invention.

Technical scheme

An object of the present invention is to provide a conjugate comprising an oxyntomodulin, an immunoglobulin Fc region and a non-peptidyl polymer, wherein the conjugate is obtainable by covalently linking the oxyntomodulin to the immunoglobulin Fc region via the non-peptidyl polymer.

It is another object of the present invention to provide a pharmaceutical composition for the prevention or treatment of obesity comprising the conjugate.

It is another object of the present invention to provide a method for preventing or treating obesity, comprising the step of administering the conjugate or composition to a subject.

It is another object of the present invention to provide use of the conjugate or composition for the preparation of a medicament for the prevention or treatment of obesity.

Advantageous effects

The conjugate comprising oxyntomodulin and immunoglobulin Fc of the present invention reduces food intake, inhibits gastric emptying and promotes lipolysis without side effects, is different from the native oxyntomodulin, and also shows excellent receptor activation and long-term sustainability compared to the oxyntomodulin. Therefore, it can be widely used for the treatment of obesity with safety and effectiveness. Unlike natural oxyntomodulin, the novel peptide of the present invention reduces food intake, inhibits gastric emptying and promotes lipolysis without side effects, and also shows excellent receptor activation. Therefore, it can be widely used for the treatment of obesity with safety and effectiveness.

Drawings

Fig. 1 is a graph showing changes in food intake according to the administration dose of oxyntomodulin or an oxyntomodulin derivative.

FIG. 2a is a graph showing the results of purifying a monopegylated oxyntomodulin peptide by SOURCE S purification column.

FIG. 2b is a graph showing the results of peptide mapping of purified monopegylated oxyntomodulin.

Fig. 2c is a graph showing the result of purifying the conjugate including oxyntomodulin and immunoglobulin Fc through a SOURCE 15Q purification column.

FIG. 3a is a graph showing the results of purifying a monopegylated oxyntomodulin peptide derivative (SEQ ID NO.29) by a SOURCE S purification column.

FIG. 3b is a graph showing the result of purifying a conjugate comprising an oxyntomodulin derivative (SEQ ID NO: 29) and immunoglobulin Fc through a SOURCE 15Q purification column.

FIG. 4a is a graph showing the results of purifying a monopegylated oxyntomodulin peptide derivative (SEQ ID NO.30) by a SOURCE S purification column.

FIG. 4b is a graph showing the results of peptide mapping of the purified mono-pegylated oxyntomodulin peptide derivative (SEQ ID NO. 30).

FIG. 4c is a graph showing the result of purifying a conjugate comprising an oxyntomodulin derivative (SEQ ID NO.30) and immunoglobulin Fc through a SOURCE 15Q purification column.

FIG. 5a is a graph showing the results of purifying a monopegylated oxyntomodulin peptide derivative (SEQ ID NO.31) by a SOURCE S purification column.

FIG. 5b is a graph showing the result of purifying a conjugate comprising an oxyntomodulin derivative (SEQ ID NO: 31) and immunoglobulin Fc through a SOURCE 15Q purification column.

FIG. 6a is a graph showing the results of purifying a monopegylated oxyntomodulin peptide derivative (SEQ ID NO.2) by a SOURCE S purification column.

FIG. 6b is a graph showing the results of peptide mapping of the purified mono-pegylated oxyntomodulin peptide derivative (SEQ ID NO. 2).

FIG. 6c is a graph showing the result of purifying a conjugate comprising an oxyntomodulin derivative (SEQ ID NO.2) and immunoglobulin Fc through a SOURCE 15Q purification column.

FIG. 6d is a graph showing the result of purifying a conjugate comprising an oxyntomodulin derivative (SEQ ID NO.2) and immunoglobulin Fc through a Source ISO purification column.

FIG. 7a is a graph showing the results of purifying a monopegylated oxyntomodulin peptide derivative (SEQ ID NO.3) by a SOURCE S purification column.

FIG. 7b is a graph showing the results of peptide mapping of the purified mono-pegylated oxyntomodulin peptide derivative (SEQ ID NO. 3).

FIG. 7c is a graph showing the result of purifying a conjugate comprising an oxyntomodulin derivative (SEQ ID NO.3) and immunoglobulin Fc through a Butyl FF purification column.

FIG. 7d is a graph showing the result of purifying a conjugate comprising an oxyntomodulin derivative (SEQ ID NO.3) and immunoglobulin Fc through a Source 15Q purification column.

FIG. 8a is a graph showing the results of purifying a monopegylated oxyntomodulin peptide derivative (SEQ ID NO.23) by a SOURCE S purification column;

FIG. 8b is a graph showing the result of purifying a conjugate comprising an oxyntomodulin derivative (SEQ ID NO.23) and immunoglobulin Fc through a Source 15Q purification column;

FIG. 8c is a graph showing the result of purifying a conjugate comprising an oxyntomodulin derivative (SEQ ID NO.23) and immunoglobulin Fc through a SOURCE ISO purification column;

FIG. 9a is a graph showing the results of purifying a monopegylated oxyntomodulin peptide derivative (SEQ ID NO.24) by a SOURCE S purification column;

FIG. 9b is a graph showing the result of purifying a conjugate comprising an oxyntomodulin derivative (SEQ ID NO.24) and immunoglobulin Fc through a Source 15Q purification column;

FIG. 9c is a graph showing the result of purifying a conjugate comprising an oxyntomodulin derivative (SEQ ID NO.24) and immunoglobulin Fc through a SOURCE ISO purification column;

FIG. 10a is a graph showing the results of purifying a monopegylated oxyntomodulin peptide derivative (SEQ ID NO.25) by a SOURCE S purification column;

FIG. 10b is a graph showing the result of purifying a conjugate comprising an oxyntomodulin derivative (SEQ ID NO.25) and immunoglobulin Fc through a Source 15Q purification column;

FIG. 10c is a graph showing the result of purifying a conjugate comprising an oxyntomodulin derivative (SEQ ID NO.25) and immunoglobulin Fc through a SOURCE ISO purification column;

FIG. 11a is a graph showing the results of purifying a monopegylated oxyntomodulin peptide derivative (SEQ ID NO.28) by a SOURCE S purification column;

FIG. 11b is a graph showing the result of purifying a conjugate comprising an oxyntomodulin derivative (SEQ ID NO: 28) and immunoglobulin Fc through a Source 15Q purification column;

FIG. 11c is a graph showing the result of purifying a conjugate comprising an oxyntomodulin derivative (SEQ ID NO: 28) and immunoglobulin Fc through a SOURCE ISO purification column;

FIG. 12 is a graph showing the change in body weight of mice according to the type and administration dose of oxyntomodulin derivative-immunoglobulin Fc conjugate.

FIG. 13 is a graph showing the change in body weight of mice according to the type and administration dose of oxyntomodulin derivative-immunoglobulin Fc conjugate.

Detailed Description

In one aspect, to achieve the above objects, the present invention provides a conjugate comprising an oxyntomodulin, an immunoglobulin Fc region, and a non-peptidyl polymer, wherein the conjugate is obtainable by covalently linking the oxyntomodulin to the immunoglobulin Fc region via the non-peptidyl polymer.

As used herein, the term "conjugate" refers to a conjugate comprising an oxyntomodulin and other factors. The other factor may be any substance that may cause increased stability in the blood, delay excretion through the kidneys, or other useful effect. In the present invention, the factor may be an immunoglobulin Fc region. Preferably, the conjugate may consist of an oxyntomodulin and an immunoglobulin Fc region linked by a non-peptidyl polymer. The non-peptidyl polymer may be linked to the oxyntomodulin peptide and the immunoglobulin Fc region by a covalent bond. Both ends of the non-peptidyl polymer may be linked to an amino group or a thiol group of an immunoglobulin Fc region and an oxyntomodulin derivative, respectively.

The conjugate of the present invention means an oxyntomodulin having an improved duration of efficacy in vivo as compared to a natural oxyntomodulin, and the long-acting conjugate may include an oxyntomodulin prepared by modification, substitution, addition or deletion of an amino acid sequence of the natural oxyntomodulin, an oxyntomodulin conjugated to a biodegradable polymer such as polyethylene glycol (PEG), an oxyntomodulin conjugated to a long-acting protein such as albumin or immunoglobulin, an oxyntomodulin conjugated to a fatty acid having an ability to bind to albumin in the body, or an oxyntomodulin encapsulated in a biodegradable nanoparticle, but the type of the long-acting conjugate is not limited thereto.

As used herein, the term "oxyntomodulin" refers to peptides derived from glucagon precursors, pre-glucagon, and includes native oxyntomodulin, precursors, derivatives, fragments thereof, and variants thereof. Preferably, it may have the amino acid sequence of SEQ ID NO.1 (HSQGTFTSDYSKYLDSRRAQDFVQWLMNTKRNRNNIA).

The term "oxyntomodulin variant" is a peptide having one or more amino acid sequences different from the natural oxyntomodulin sequence, and refers to a peptide that retains the function of activating GLP-1 and glucagon receptors, and it can be prepared by any one of substitution, addition, deletion and modification in the partial amino acid sequence of the natural oxyntomodulin or by a combination thereof.

The term "oxyntomodulin peptide derivative" includes a peptide, peptide derivative or peptide mimetic prepared by addition, deletion or substitution of amino acids of an oxyntomodulin peptide, which activates the GLP-1 receptor and the glucagon receptor at a high level compared to the natural oxyntomodulin peptide.

The term "oxyntomodulin peptide fragment" refers to a fragment in which one or more amino acids are added or deleted at the N-terminus or C-terminus of a natural oxyntomodulin peptide, wherein a non-naturally occurring amino acid (e.g., a D-type amino acid) may be added, and has a function of activating the GLP-1 receptor and the glucagon receptor.

Each of the methods for preparing oxyntomodulin variants, derivatives and fragments may be used alone or in combination. For example, the present invention includes peptides having one or more amino acids different from the native peptide and deamination of the N-terminal amino acid residue, and having the function of activating the GLP-1 receptor and the glucagon receptor.

The amino acids mentioned herein are abbreviated as follows according to the IUPAC-IUB nomenclature:

alanine A arginine R

Asparagine N aspartic acid D

Cysteine C glutamic acid E

Glutamine Q Glycine G

Histidine H isoleucine I

Leucine L lysine K

Methionine Mphenylalanine F

Proline phenylserine S

Threonine T Tryptophan W

Tyrosine Yvaline V

In the present invention, oxyntomodulin derivatives include any peptide prepared by substitution, addition, deletion or post-translational modification (e.g., methylation, acylation, ubiquitination, intramolecular covalent binding) in the oxyntomodulin amino acid sequence (HSQGTFTSDYSKYLDSRRAQDFVQWLMNTKRNRNNIA, SEQ ID NO.1) to simultaneously activate glucagon and GLP-1 receptor. Following substitution or addition of amino acids, any of the 20 amino acids commonly found in human proteins, as well as atypical or non-naturally occurring amino acids, may be used. Commercially available sources of atypical amino acids include Sigma-Aldrich, ChemPep Inc. and Genzyme Pharmaceuticals. Peptides and atypical Peptide sequences comprising these amino acids may be synthesized and purchased from commercial suppliers, for example, American Peptide Company or Bachem (USA) or Anygen (Korea).

In one embodiment, the oxyntomodulin derivative of the present invention is a novel peptide comprising the amino acid of the following formula 1.

R1-X1-X2-GTFTSD-X3-X4-X5-X6-X7-X8-X9-X10-X11-X12-X13-X14-X15-X16-X17-X18-X19-X20-X21-X22-X23-X24-R2 (formula 1)

Wherein R1 is histidine, deaminated-histidyl, dimethyl-histidyl (N-dimethyl-histidyl), β -hydroxyimidazolidinoyl (hydroxyimidazolidinopropionyl), 4-imidazoleacetyl, β -carboxyimidazolidinoyl or tyrosine;

x1 is Aib (aminoisobutyric acid), d-alanine, glycine, Sar (N-methylglycine), serine or d-serine;

x2 is glutamic acid or glutamine;

x3 is leucine or tyrosine;

x4 is serine or alanine;

x5 is lysine or arginine;

x6 is glutamine or tyrosine;

x7 is leucine or methionine;

x8 is aspartic acid or glutamic acid;

x9 is glutamic acid, serine, alpha-methyl-glutamic acid, or is deleted;

x10 is glutamine, glutamic acid, lysine, arginine, serine, or is deleted;

x11 is alanine, arginine, valine, or deleted;

x12 is alanine, arginine, serine, valine, or deleted;

x13 is lysine, glutamine, arginine, α -methyl-glutamic acid, or deleted;

x14 is aspartic acid, glutamic acid, leucine or deleted;

x15 is phenylalanine or deleted;

x16 is isoleucine, valine, or deleted;

x17 is alanine, cysteine, glutamic acid, lysine, glutamine, alpha-methyl-glutamic acid, or is deleted;

x18 is tryptophan or is deleted;

x19 is alanine, isoleucine, leucine, serine, valine, or is deleted;

x20 is alanine, lysine, methionine, glutamine, arginine, or deleted;

x21 is asparagine or is deleted;

x22 is alanine, glycine, threonine or deleted;

x23 is cysteine, lysine or deleted;

x24 is a peptide having 2 to 10 amino acids consisting of a combination of alanine, glycine, and serine, or is deleted; and

r2 is KRNRNNIA (SEQ ID NO.35), GPSSGAPPPS (SEQ ID NO.36), GPSSGAPPPSK (SEQ ID NO.37), HSQGTFTSDYSKYLD (SEQ ID NO.38), HSQGTFTSDYSRYLDK (SEQ ID NO.39), HGEGTFTSDLSKQMEEEAVK (SEQ ID NO.40) or deleted (excluded if the amino acid sequence of formula 1 is identical to SEQ ID NO. 1).

To increase the activity of the wild-type oxyntomodulin peptide at the glucagon receptor and the GLP-1 receptor, the peptide of the present invention may be substituted with: 4-imidazoleacetyl wherein the alpha carbon of histidine at position 1 of the amino acid sequence represented by SEQ ID No.1 is deleted; deamination-histidyl-wherein the N-terminal amino group is deleted; dimethyl-histidyl (N-dimethyl-histidyl) -in which the N-terminal amino group is modified with two methyl groups; beta-hydroxyimidazolidinoyl in which the N-terminal amino group is replaced by a hydroxyl group; or β -carboxyimidazolidinoyl in which the N-terminal amino group is replaced by a carboxyl group. In addition, the GLP-1 receptor-binding region may be substituted with amino acids that increase hydrophobic and ionic bonds, or a combination thereof. The partial secretion acid regulatory peptide sequence may be substituted with the amino acid sequence of GLP-1 or exenatide-4 to increase activity at the GLP-1 receptor.

Further, the partial oxyntomodulin peptide sequence may be replaced with a sequence that stabilizes the alpha helix. Preferably, the amino acids at positions 10, 14, 16, 20, 24 and 28 of the amino acid sequence of formula 1 can be substituted with amino acids or amino acid derivatives consisting of Tyr (4-Me), Phe (4-Me), Phe (4-Cl), Phe (4-CN), Phe (4-NO) known to stabilize the alpha helix₂)、Phe(4-NH₂) Phg, Pal, Nal, Ala (2-thienyl) and Ala (benzothienyl) -substitutions, and there is no limitation on the type and number of alpha helix-stabilizing amino acids or amino acid derivatives to be inserted. Preferably, the amino acids at positions 10 and 14, 12 and 16, 16 and 20, 20 and 24, and 24 and 28 may be substituted with glutamic acid or lysine, respectively, to form a ring, and there is no limitation on the number to be inserted. Most preferably, the peptide may be a peptide having an amino acid sequence selected from the following formulas 1 to 6.

In one embodiment, the oxyntomodulin derivative of the present invention is a novel peptide comprising the amino acid sequence of the following formula 2, wherein the amino acid sequence of the oxyntomodulin is substituted with the amino acid sequence of exenatide or GLP-1.

R1-A-R3 (formula 2)

In another embodiment, the oxyntomodulin derivative of the present invention is a novel peptide comprising the amino acid sequence of the following formula 3, which is prepared by linking a partial amino acid sequence of the oxyntomodulin and a partial amino acid sequence of exenatide or GLP-1 through an appropriate amino acid linker.

R1-B-C-R4 (formula 3)

In still another embodiment, the oxyntomodulin derivative of the invention is a novel peptide comprising the amino acid sequence of the following formula 4, wherein a part of the amino acid sequence of the oxyntomodulin is substituted with an amino acid which improves the binding affinity to the GLP-1 receptor, for example, Leu at position 26, which binds to the GLP-1 receptor through hydrophobic interaction, is substituted with a hydrophobic residue, Ile or Val.

R1-SQGTFTSDYSKYLD-D1-D2-D3-D4-D5-LFVQW-D6-D7-N-D8-R3 (formula 4)

In still another embodiment, the oxyntomodulin derivative of the present invention is a novel peptide comprising the following formula 5, wherein a part of the amino acid sequence is deleted, added or substituted with other amino acids to enhance the activity of the natural oxyntomodulin peptide at the GLP-1 receptor and the glucagon receptor.

R1-E1-QGTFTSDYSKYLD-E2-E3-RA-E4-E5-FV-E6-WLMNT-E7-R5 (formula 5)

In formulae 2 to 5, R1 is the same as in the description of formula 1;

a is selected from SQGTFTSDYSKYLDSRRAQDFVQWLMNT (SEQ ID NO.41), SQGTFTSDYSKYLDEEAVRLFIEWLMNT (SEQ ID NO.42), SQGTFTSDYSKYLDERRAQDFVAWLKNT (SEQ ID NO.43), GQGTFTSDYSRYLEEEAVRLFIEWLKNG (SEQ ID NO.44), GQGTFTSDYSRQMEEEAVRLFIEWLKNG (SEQ ID NO.45), GEGTFTSDLSRQMEEEAVRLFIEWAA (SEQ ID NO.46) and SQGTFTSDYSRQMEEEAVRLFIEWLMNG (SEQ ID NO. 47);

b is selected from SQGTFTSDYSKYLDSRRAQDFVQWLMNT (SEQ ID NO.41), SQGTFTSDYSKYLDEEAVRLFIEWLMNT (SEQ ID NO.42), SQGTFTSDYSKYLDERRAQDFVAWLKNT (SEQ ID NO.43), GQGTFTSDYSRYLEEEAVRLFIEWLKNG (SEQ ID NO.44), GQGTFTSDYSRQMEEEAVRLFIEWLKNG (SEQ ID NO.45), GEGTFTSDLSRQMEEEAVRLFIEWAA (SEQ ID NO.46), SQGTFTSDYSRQMEEEAVRLFIEWLMNG (SEQ ID NO.47), GEGTFTSDLSRQMEEEAVRLFIEW (SEQ ID NO.48) and SQGTFTSDYSRYLD (SEQ ID NO. 49);

c is a peptide having 2 to 10 amino acids consisting of a combination of alanine, glycine and serine;

d1 is serine, glutamic acid, or arginine;

d2 is arginine, glutamic acid, or serine;

d3 is arginine, alanine, or valine;

d4 is arginine, valine, or serine;

d5 is glutamine, arginine, or lysine;

d6 is isoleucine, valine, or serine;

d7 is methionine, arginine or glutamine;

d8 is threonine, glycine or alanine;

e1 is serine, Aib, Sar, d-alanine or d-serine;

e2 is serine or glutamic acid;

e3 is arginine or lysine;

e4 is glutamine or lysine;

e5 is aspartic acid or glutamic acid;

e6 is glutamine, cysteine or lysine;

e7 is cysteine, lysine or deleted;

r3 is KRNRNNIA (SEQ ID NO.35), GPSSGAPPPS (SEQ ID NO.36) or GPSSGAPPPSK (SEQ ID NO. 37);

r4 is HSQGTFTSDYSKYLD (SEQ ID NO.38), HSQGTFTSDYSRYLDK (SEQ ID NO.39) or HGEGTFTSDLSKQMEEEAVK (SEQ ID NO. 40); and the combination of (a) and (b),

r5 is KRNRNNIA (SEQ ID NO.35), GPSSGAPPPS (SEQ ID NO.36), GPSSGAPPPSK (SEQ ID NO.37) or deleted (excluded if the amino acid sequence of formulas 2 to 5 is identical to the amino acid sequence of SEQ ID NO. 1).

Preferably, the oxyntomodulin derivative of the present invention may be a novel peptide of the following formula 6.

R1-X1-X2-GTFTSD-X3-X4-X5-X6-X7-X8-X9-X10-X11-X12-X13-X14-X15-X16-X17-X18-X19-X20-X21-X22-X23-X24-R2 (formula 6)

Wherein R1 is histidine, desamino-histidyl, 4-imidazoleacetyl or tyrosine;

x1 is Aib (aminoisobutyric acid), glycine, or serine;

x2 is glutamic acid or glutamine;

x3 is leucine or tyrosine;

x4 is serine or alanine;

x5 is lysine or arginine;

x6 is glutamine or tyrosine;

x7 is leucine or methionine;

x8 is aspartic acid or glutamic acid;

x9 is glutamic acid, α -methyl-glutamic acid, or is deleted;

x10 is glutamine, glutamic acid, lysine, arginine, or is deleted;

x11 is alanine, arginine, or deleted;

x12 is alanine, valine, or deleted;

x13 is lysine, glutamine, arginine, α -methyl-glutamic acid, or deleted;

x14 is aspartic acid, glutamic acid, leucine or deleted;

x15 is phenylalanine or deleted;

x16 is isoleucine, valine, or deleted;

x17 is alanine, cysteine, glutamic acid, glutamine, alpha-methyl-glutamic acid, or is deleted;

x18 is tryptophan or is deleted;

x19 is alanine, isoleucine, leucine, valine, or is deleted;

x20 is alanine, lysine, methionine, arginine, or deleted;

x21 is asparagine or is deleted;

x22 is threonine or deleted;

x23 is cysteine, lysine or deleted;

x24 is a peptide having 2 to 10 amino acids consisting of glycine, or is deleted; and

r2 is KRNRNNIA (SEQ ID NO.35), GPSSGAPPPS (SEQ ID NO.36), GPSSGAPPPSK (SEQ ID NO.37), HSQGTFTSDYSKYLD (SEQ ID NO.38), HSQGTFTSDYSRYLDK (SEQ ID NO.39), HGEGTFTSDLSKQMEEEAVK (SEQ ID NO.40) or deleted (excluded if the amino acid sequence of formula 6 is identical to the amino acid sequence of SEQ ID NO. 1).

More preferably, the oxyntomodulin derivative of the invention may be selected from the peptides of SEQ ID nos.2 to 34. More preferably, the oxyntomodulin derivative of the present invention may be an oxyntomodulin derivative described in Table 1 of example 2-1.

Oxyntomodulin has the activity of two peptides, GLP-1 and glucagon. GLP-1 lowers blood glucose, reduces food intake and inhibits gastric emptying, glucagon increases blood glucose, promotes lipolysis and lowers body weight by increasing energy metabolism. The different biological effects of the two peptides may cause undesirable effects, such as increasing blood glucose in cases where glucagon exhibits a more dominant effect than GLP-1, or nausea and vomiting in cases where GLP-1 exhibits a more dominant effect than glucagon. For example, the binders produced in example 10 below show greater affinity for the GLP-1 receptor than the binders produced in example 12, but the former are less potent than the latter, as shown in the in vivo assay in example 18. This may be due to the increased potency of the conjugate associated with the glucagon receptor in example 12, although its low potency is associated with the GLP-1 receptor. Therefore, the oxyntomodulin derivatives of the present invention and their conjugates are not limited to those showing unconditionally increased activity. For example, amino acids may be modified at positions 1 and 11 of oxyntomodulin, which are known to inhibit the activity of glucagon, to control the ratio of activity between glucagon and GLP-1.

The conjugates of the present invention may induce increased stability in blood, delay excretion through the kidney, and change affinity for receptors by covalently linking a carrier to oxyntomodulin or forming microspheres. The carrier that can form a conjugate containing the oxyntomodulin peptide may be selected from the group consisting of albumin, transferrin, antibodies, antibody fragments, elastin, heparin, polysaccharides such as chitin, fibronectin and most advantageously an immunoglobulin Fc region, all of which can increase the blood half-life of the conjugate when conjugated to the oxyntomodulin peptide.

The term "immunoglobulin Fc region" as used herein refers to a protein comprising heavy chain constant region 2(CH2) and heavy chain constant region 3(CH3) of an immunoglobulin, excluding the heavy and light chain variable regions, heavy chain constant region 1(CH1) and light chain constant region 1(CL1) of an immunoglobulin. It may further comprise a hinge region at the heavy chain constant region. Also, the immunoglobulin Fc region of the present invention may contain part or all of the Fc region, including heavy chain constant region 1(CH1) and/or light chain constant region 1(CL1), in addition to the heavy chain and light chain variable regions, so long as it has substantially similar or better physiological functions than the native protein. Also, the immunoglobulin Fc region may be a fragment having deletions in a relatively long portion of the CH2 and/or CH3 amino acid sequence. That is, the immunoglobulin Fc region of the present invention may include 1) a CH1 domain, a CH2 domain, a CH3 domain, and a CH4 domain; 2) a CH1 domain and a CH2 domain; 3) a CH1 domain and a CH3 domain; 4) a CH2 domain and a CH3 domain; 5) a combination of one or more domains and an immunoglobulin hinge region (or partial hinge region); and 6) a dimer of each domain in the heavy chain constant region and the light chain constant region.

The immunoglobulin Fc region of the present invention includes native amino acid sequences and sequence derivatives (mutants) thereof. Amino acid sequence derivatives are sequences that differ from the native amino acid sequence by the deletion, insertion, non-conservative or conservative substitution of one or more amino acid residues, or a combination thereof. For example, in IgG Fc, amino acid residues at positions 214 to 238, 297 to 299, 318 to 322, or 327 to 331 known to be important in binding may be used as suitable modification targets.

Also, various other derivatives are possible, including one in which a region capable of forming a disulfide bond is deleted, or certain amino acid residues are removed at the N-terminus of the native Fc form or a methionine residue is added thereto. Further, to remove effector functions, deletions may occur at complement-binding sites, such as the C1 q-binding site and ADCC (antibody dependent cell mediated cytotoxicity) sites. Techniques for preparing sequence derivatives of such immunoglobulin Fc regions are disclosed in WO 97/34631 and WO 96/32478.

Amino acid exchanges in Proteins and peptides, which do not generally alter The activity of The protein or peptide, are known in The art (h.neurath, r.l.hill, The Proteins, Academic Press, New York, 1979). The exchanges that most commonly occur are Ala/Ser, Val/Ile, Asp/Glu, Thr/Ser, Ala/Gly, Ala/Thr, Ser/Asn, Ala/Val, Ser/Gly, Thy/Phe, Ala/Pro, Lys/Arg, Asp/Asn, Leu/Ile, Leu/Val, Ala/Glu and Asp/Gly, in both directions. In addition, the Fc region, if desired, may be modified by phosphorylation, sulfation, acrylation, glycosylation, methylation, farnesylation, acetylation, amidation, and the like.

The aforementioned Fc derivatives are derivatives having the same biological activity as the Fc region of the present invention or improved structural stability, e.g., resistance to heat, pH, etc.

In addition, these Fc regions may be obtained in native form isolated from humans and other animals including cows, goats, pigs, mice, rabbits, hamsters, rats and guinea pigs, or may be recombinants or derivatives thereof, obtained from transformed animal cells or microorganisms. Here, they can be obtained from natural immunoglobulins by isolating all immunoglobulins from the human or animal body and treating them with proteolytic enzymes. Papain digests native immunoglobulins into Fab and Fc regions, and pepsin treatment results in the production of pF' c and f (ab)2 fragments. These fragments can be subjected to, for example, size exclusion chromatography to separate Fc or pF' c. Preferably, the human-derived Fc region is a recombinant immunoglobulin Fc region obtained from a microorganism.

Furthermore, the immunoglobulin Fc region of the present invention may be in the form of having natural sugar chains, sugar chains increased as compared to the natural form, or sugar chains decreased as compared to the natural form, or may be in a deglycosylated form. The addition, reduction or removal of immunoglobulin Fc sugar chains can be achieved by methods common in the art, such as chemical methods, enzymatic methods and genetic engineering methods using microorganisms. Removal of the sugar chain from the Fc region results in a dramatic decrease in binding affinity to the C1q portion of the first complement component C1 and a decrease or loss of antibody-dependent cell-mediated cytotoxicity or complement-dependent cytotoxicity, thereby not eliciting an unwanted immune response in vivo. In this regard, deglycosylated or unglycosylated forms of immunoglobulin Fc regions as drug carriers may be more suitable for the purposes of the present invention.

As used herein, the term "deglycosylation" refers to the enzymatic removal of sugar moieties from the Fc region, and the term "aglycosylation" refers to the production of the Fc region in an unglycosylated form by prokaryotes, preferably e.

Meanwhile, the immunoglobulin Fc region may be derived from a human or other animals including cows, goats, pigs, mice, rabbits, hamsters, rats and guinea pigs, preferably from a human.

Further, the immunoglobulin Fc region may be an Fc region derived from IgG, IgA, IgD, IgE, and IgM, or an Fc region made from a combination thereof or a hybrid thereof. Preferably, it is derived from IgG or IgM, which is among the most abundant proteins in human blood, and most preferably from IgG, which is known to increase the half-life of ligand-binding proteins.

On the other hand, the term "combination", as used herein, refers to the linkage of a polypeptide encoding a single-chain immunoglobulin Fc region of the same origin to a single-chain polypeptide of a different origin to form a dimer or multimer. That is, the dimer or multimer may be formed from two or more fragments selected from IgG Fc, IgAFc, IgM Fc, IgD Fc, and IgE Fc fragments.

The term "non-peptidyl polymer" refers to a biocompatible polymer comprising two or more repeating units linked to each other by any covalent bond other than a peptide bond. In the present invention, the nonpeptidyl polymer may be used interchangeably with the nonpeptidyl linker.

The non-peptidyl polymer used in the present invention may be selected from biodegradable polymers, lipid polymers, chitin, hyaluronic acid and combinations thereof, and preferably, the biodegradable polymer may be polyethylene glycol, polypropylene glycol, ethylene glycol-propylene glycol copolymer, polyoxyethylene polyol, polyvinyl alcohol, polysaccharide, dextran, polyethylene ethyl ether, polylactic acid (PLA) or polylactic glycolic acid (PLGA), and more preferably, polyethylene glycol (PEG). In addition, derivatives thereof known in the art and derivatives that can be easily prepared by methods known in the art can be included in the scope of the present invention.

Peptide linkers for fusion proteins obtained by conventional in-frame fusion methods have the disadvantage that: it is easily cleaved in vivo by proteolytic enzymes, and thus cannot obtain a sufficient effect of increasing the serum half-life of the active drug by the carrier as desired. However, in the present invention, a polymer resistant to proteolytic enzymes can be used to maintain the serum half-life of the peptide similar to the carrier. Therefore, any nonpeptidyl polymer may be used without limitation so long as it is a polymer having the aforementioned function, i.e., a polymer having resistance to proteolytic enzymes in vivo. The non-peptidyl polymer has a molecular weight of 1 to 100kDa and preferably 1 to 20 kDa. The non-peptidyl polymer of the present invention, which is linked to an immunoglobulin Fc region, may be one polymer or a combination of different types of polymers.

The non-peptidyl polymer used in the present invention has a reactive group capable of binding to an immunoglobulin Fc region and a protein drug. The non-peptidyl polymer has a reactive group at both ends, which is preferably selected from the group consisting of reactive aldehyde, propionaldehyde, butyraldehyde, maleimide and succinimide derivative. The succinimide derivative may be a succinimide propionate, hydroxysuccinimide, succinimide carboxymethyl or succinimide carbonate. In particular, when the nonpeptidyl polymer has reactive aldehyde groups at both ends thereof, it is effective to link a physiologically active polypeptide and an immunoglobulin at both ends with minimal non-specific reaction. The final product resulting from reductive alkylation via an aldehyde linkage is much more stable than the product linked via an amide linkage. The aldehyde reactive group selectively binds to the N-terminus at low pH and to the lysine residue at high pH, e.g., pH 9.0, to form a covalent bond. The reactive groups at both ends of the non-peptidyl polymer may be the same or different. For example, the nonpeptidyl polymer may have a maleimide group at one end and an aldehyde group, a propionaldehyde group, or a butyraldehyde group at the other end. When polyethylene glycol having reactive hydroxyl groups at both ends thereof is used as the non-peptidyl polymer, the hydroxyl groups may be activated into various reactive groups by known chemical reactions, or polyethylene glycol having commercially available modified reactive groups may be utilized to prepare the long-acting conjugate of the present invention.

The conjugate of the present invention may be such that both ends of the non-peptidyl polymer having two reactive terminal groups are linked to the immunoglobulin Fc region and the amine group or the thiol group of the oxyntomodulin derivative, respectively.

The non-peptidyl polymer has a reactive group at both ends, which is preferably selected from the group consisting of a reactive aldehyde group, a malonaldehyde group, a butyraldehyde group, a maleimide group and a succinimide derivative. The succinimide derivative may be a succinimide propionate, hydroxysuccinimide, succinimide carboxymethyl or succinimide carbonate.

The two reactive end groups of the nonpeptidyl polymer may be the same as or different from each other. For example, the non-peptidic polymer may have a maleimide group at one end and an aldehyde group, a propionaldehyde group, or a butyraldehyde group at the other end. For example, when a nonpeptidyl polymer has a reactive aldehyde group at one end and a maleimide group at the other end, it is effective to link a physiologically active polypeptide and an immunoglobulin at both ends with minimal non-specific reaction. According to an embodiment of the present invention, a conjugate is prepared by linking an oxyntomodulin or a derivative thereof and an immunoglobulin Fc region by a covalent bond using PEG, which is a non-peptidyl polymer including a single malonyl group or a maleimide group and an aldehyde group.

The conjugate of the present invention shows superior activity to native oxyntomodulin at the GLP-1 receptor and glucagon receptor, and blood half-life is increased due to the linkage to the Fc region, thereby maintaining in vivo activity for a long period of time.

In still another aspect, the present invention provides a pharmaceutical composition for the prevention or treatment of obesity, comprising the peptide.

As used herein, the term "prevention" refers to all effects of a disease occurrence that are inhibited or prevented. In the present invention, "prevention" means that the occurrence of obesity derived from such factors as body weight or body fat increase is inhibited or prevented by the administration of the conjugate of the present invention.

As used herein, the term "treatment" refers to all actions by which the symptoms of a disease have been alleviated, ameliorated, or alleviated. In the present invention, "treatment" means that the symptoms of obesity are alleviated, ameliorated, or reduced by administration of a conjugate of the invention, resulting in a reduction in body weight or body fat.

As used herein, the term "obesity" means that excess adipose tissue accumulates in the body, and a body mass index (body weight (kg) divided by height squared (m)) above 25 is considered obese. Obesity is usually caused by an energy imbalance when dietary intake exceeds energy expenditure for a long period. Obesity is a metabolic disease that affects the whole body and increases the risk of diabetes, hyperlipidemia, sexual dysfunction, arthritis, and cardiovascular disease, and in some cases is associated with cancer development.

The conjugate of the present invention, which is prepared by linking oxyntomodulin or a derivative thereof to an immunoglobulin Fc region, shows excellent binding affinity to glucagon and GLP-1 receptors (table 3) and excellent resistance to in vivo proteolytic enzymes to exhibit long-term in vivo activity, thereby showing excellent anti-obesity effects such as weight loss (fig. 12).

The pharmaceutical composition of the present invention may further comprise a pharmaceutically acceptable carrier, excipient or diluent. As used herein, the term "pharmaceutically acceptable" means that the composition is sufficient to achieve a therapeutic effect without deleterious side effects, and can be readily determined according to the following: disease type, patient age, weight, health status, sex and drug sensitivity, route of administration, mode of administration, frequency of administration, duration of treatment, drugs combined or taken concurrently with the compositions of the invention, and other factors known to the drugs.

Pharmaceutical compositions comprising the derivatives of the invention may further comprise a pharmaceutically acceptable carrier. For oral administration, carriers can include, but are not limited to, binders, lubricants, disintegrants, excipients, solubilizers, dispersants, stabilizers, suspending agents, coloring agents, and flavoring agents. For injectable formulations, the carrier may include buffers, preservatives, analgesics, solubilizers, isotonic agents and stabilizers. For formulations for topical administration, the carrier may include bases, excipients, lubricants, and preservatives.

The composition of the present invention can be combined with the above pharmaceutically acceptable carriers to be formulated into various dosage forms. For example, for oral administration, the pharmaceutical compositions may be formulated as tablets, troches, capsules, elixirs, suspensions, syrups, or wafers. For injectable preparations, the pharmaceutical compositions may be formulated in ampoules, as single dosage forms or in multi-dose containers. The pharmaceutical compositions may also be formulated as solutions, suspensions, tablets, pills, capsules and depot preparations.

On the other hand, examples of carriers, excipients and diluents suitable for pharmaceutical preparations include lactose, glucose, sucrose, sorbitol, mannitol, xylitol, erythritol, maltitol, starch, gum arabic rubber, alginate, gelatin, calcium phosphate, calcium silicate, cellulose, methyl cellulose, microcrystalline cellulose, polyvinylpyrrolidone, water, methylhydroxybenzoate, propylhydroxybenzoate, talc, magnesium stearate and mineral oil. In addition, the pharmaceutical preparation may further include fillers, anticoagulants, lubricants, wetting agents, flavoring agents, and antibacterial agents.

Further, the pharmaceutical composition of the present invention may have any formulation selected from the group consisting of: tablets, pills, powders, granules, capsules, suspensions, liquids for internal use (liquids for internal use), emulsions, syrups, sterile aqueous solutions, non-aqueous solvents, lyophilized formulations and suppositories.

Further, the composition may be formulated into a single dosage form suitable for the body of a patient, and is preferably formulated into a formulation applicable to peptide drugs according to the general methods in the pharmaceutical field, so as to be administered by oral or parenteral routes, such as cutaneous, intravenous, intramuscular, intraarterial, intramedullary, intraventricular, pulmonary, transdermal, subcutaneous, intraperitoneal, intranasal, intracolonic, topical, sublingual, vaginal or rectal administration, but not limited thereto.

The composition can be applied by mixing with various pharmaceutically acceptable carriers such as physiological saline or organic solvents. To increase stability or absorption, carbohydrates such as glucose, sucrose or dextran, antioxidants such as ascorbic acid or glutathione, chelating agents, low molecular weight proteins, or other stabilizers may be used.

The dosage and frequency of administration of the pharmaceutical composition of the present invention are determined by the type of active ingredient, as well as various factors such as the disease to be treated, the route of administration, the age, sex and weight of the patient, and the severity of the disease.

An effective total dose of the composition of the invention may be administered to a patient in a single dose, or may be administered in multiple doses over an extended period of time, according to a fractionated treatment regimen. In the pharmaceutical composition of the present invention, the content of the active ingredient may vary depending on the severity of the disease. Preferably, the total daily dose of the peptide of the present invention may be about 0.0001. mu.g to 500mg per 1kg of body weight of the patient. However, in addition to the route of administration and frequency of treatment of the pharmaceutical composition, the effective dose of the peptide is determined in consideration of various factors: including patient age, weight, health, sex, disease severity, diet, and secretion rate. In view of this, one skilled in the art can readily determine an effective dose suitable for a particular application of the pharmaceutical composition of the present invention. The pharmaceutical composition according to the present invention is not particularly limited to the formulation and administration route and mode as long as it shows the effect of the present invention.

The pharmaceutical compositions of the present invention exhibit excellent in vivo duration of efficacy and titer, thereby significantly reducing the number and frequency of their administration.

In addition, the pharmaceutical composition may be administered alone or in combination or simultaneously with other pharmaceutical agents showing a preventive or therapeutic effect on obesity. The pharmaceutical preparation showing a preventive or therapeutic effect on obesity is not particularly limited, and may include GLP-1 receptor agonists, leptin receptor agonists, DPP-IV inhibitors, Y5 receptor antagonists, Melanin Concentrating Hormone (MCH) receptor antagonists, Y2/3 receptor agonists, MC3/4 receptor agonists, gastric/pancreatic lipase inhibitors, 5HT2c agonists, β 3A receptor agonists, amylin receptor agonists, titanium ghrelin antagonists and/or titanium ghrelin receptor antagonists.

In yet another aspect, the present invention provides a method for preventing or treating obesity, comprising the steps of: administering to the subject the conjugate or a pharmaceutical composition comprising the conjugate.

As used herein, the term "administering" refers to introducing a predetermined amount of a substance into a patient by some suitable method. The composition of the present invention may be administered by any conventional route so long as it reaches the desired tissue, for example, but not limited to, intraperitoneal, intravenous, intramuscular, subcutaneous, intradermal, oral, topical, intranasal, intrapulmonary, or intrarectal administration. However, since peptides are digested after oral administration, the active ingredients of compositions for oral administration should be coated or formulated to resist decomposition in the stomach.

In the present invention, the term "subject" is a subject suspected of being obese and means a mammal, including humans, mice and livestock, suffering from obesity or having a likelihood of obesity. However, any subject treated with the peptide or pharmaceutical composition of the present invention is included without limitation. Pharmaceutical compositions comprising the peptides of the invention are administered to a subject suspected of being obese, thereby effectively treating the subject. Obesity is as described above.

The treatment method of the invention may comprise the steps of: administering a composition comprising the peptide in a pharmaceutically effective amount. The total daily dose should be determined by appropriate medical judgment made by a physician and administered once or several times. In the objective aspects of the invention, the specific therapeutically effective dose level for any particular patient may vary depending on a variety of factors well known in the medical arts, including the type and extent of the response to be achieved, the specific composition, depending on whether other agents are being used therewith, the age, weight, health, sex and diet of the patient, the number and route of administration, the secretion rate of the composition, the period of treatment, other drugs used in combination or concomitantly with the composition of the invention, and like factors well known in the art.

In still another aspect, the present invention provides use of the conjugate or a pharmaceutical composition comprising the conjugate in the manufacture of a medicament for preventing or treating obesity.

EMBODIMENTS FOR CARRYING OUT THE INVENTION

Hereinafter, the present invention will be described in more detail with reference to the following examples. However, these examples are for illustrative purposes only, and the present invention is not intended to be limited by these examples.

Example 1 preparation of in vitro activated cell lines

Example 1-1: preparation of cell lines exhibiting cAMP response to GLP-1

PCR was performed using a region corresponding to ORF (open reading frame) of cDNA (OriGene Technologies, inc. usa) of the human GLP-1 receptor gene as a template, and the following forward and reverse primers including respective HindIII and EcoRI restriction sites, to obtain a PCR product.

A forward primer: 5'-CCCGGCCCCCGCGGCCGCTATTCGAAATAC-3' (SEQ ID NO.47)

Reverse primer: 5'-GAACGGTCCGGAGGACGTCGACTCTTAAGATAG-3' (SEQ ID NO.48)

The PCR product was cloned into a known animal cell expression vector x0GC/dhfr to prepare a recombinant vector x0GC/GLP 1R.

A CHO DG44 cell line cultured in DMEM/F12 (10% FBS) medium was transfected with the recombinant vector x0GC/GLP1R using Lipofectamine (Invitrogen, USA) and cultured in selective medium containing 1mg/mL G418 and 10nM methotrexate. From this monoclonal cell line was selected by limiting dilution technique and finally a cell line showing excellent cAMP response to GLP-1 in a concentration dependent manner was selected.

Examples 1 to 2: preparation of cell lines showing cAMP response to glucagon

PCR was performed using a region corresponding to the ORF of cDNA of the human glucagon receptor gene (OriGene Technologies, inc. usa) as a template, and the following forward and reverse primers including restriction sites of EcoRI and XhoI, respectively, to obtain a PCR product.

A forward primer: 5'-CAGCGACACCGACCGTCCCCCCGTACTTAAGGCC-3' (SEQ ID NO.49)

Reverse primer: 5'-CTAACCGACTCTCGGGGAAGACTGAGCTCGCC-3' (SEQ ID NO.50)

The PCR product was cloned into a known animal cell expression vector x0GC/dhfr to prepare a recombinant vector x0 GC/GCGR.

A CHO DG44 cell line cultured in DMEM/F12 (10% FBS) medium was transfected with the recombinant vector x0GC/GCGR using Lipofectamine and cultured in selection medium containing 1mg/mL G418 and 10nM methotrexate. From this, monoclonal cell lines were selected by limiting dilution technique, and finally cell lines showing excellent cAMP response to glucagon in a concentration-dependent manner were selected.

Example 2 testing of in vitro Activity of oxyntomodulin peptide derivatives

Example 2-1: synthesis of oxyntomodulin derivatives

To measure the in vitro activity of oxyntomodulin derivatives, oxyntomodulin derivatives having the following amino acid sequences were synthesized (table 1).

TABLE 1

Oxyntomodulin and oxyntomodulin derivative

In table 1, bold and underlined amino acids indicate loop formation, and the amino acid denoted by X means an unnatural amino acid, α -methyl-glutamic acid. Further, CA represents 4-imidazolylacetyl, and DA represents deamination-histidinyl.

Example 2-2: exo-activity assay for oxyntomodulin derivatives

To measure the anti-obesity efficacy of the oxyntomodulin derivative synthesized in example 2-1, cell activities were measured in vitro using the cell lines prepared in examples 1-1 and 1-2.

The cell line was prepared by transfecting CHO (Chinese hamster ovary) to express a human GLP-1 receptor gene and a glucagon receptor gene, respectively. Thus, it is suitable for measuring GLP-1 and glucagon activities. Therefore, the activity of each oxyntomodulin derivative was measured using each transformed cell line.

Specifically, each cell line was subcultured twice or three times a week and at 1 × 10⁵Is aliquoted into each well of a 96-well plate, and then cultured for 24 hours.

The cultured cells were washed with KRB buffer and suspended in 40ml KRB buffer containing 1mM IBMX and left for 5 minutes at room temperature. Oxyntomodulin (SEQ ID NO.1) and oxyntomodulin derivatives (represented by SEQ ID NOs.2-6, 8, 10-13, 17, 18, 23-25, 27, 28 and 32-34) were diluted from 1000nM to 0.02nM by 5-fold serial dilution, and 40mL each thereof was added to the cells and cultured in a CO2 incubator at 37 ℃ for 1 hour. Then, 20mL of cell lysis buffer was added to perform cell lysis, and the cell lysate was used in a cAMP assay kit (Molecular Device, USA) to measure cAMP concentration. Thus calculating EC₅₀Values and compared to each other. EC (EC)₅₀The values are shown in table 2 below.

TABLE 2

Comparison of in vitro Activity of the GLP-1 receptor and glucagon receptor between oxyntomodulin and oxyntomodulin derivatives

As shown in Table 2, compared with the natural oxyntomodulin of SEQ ID NO.1, the oxyntomodulin derivative showed excellent in vitro activity and different activity ratio to GLP-1 receptor and glucagon receptor.

It is known that oxyntomodulin activates the GLP-1 receptor and the glucagon receptor to suppress appetite, promote lipolysis, and promote satiety, thereby exhibiting an anti-obesity effect. The oxyntomodulin peptide derivative according to the present invention shows higher in vitro activity at both GLP-1 receptor and glucagon receptor than the wild-type oxyntomodulin peptide, and thus can be used as an obesity therapeutic agent with higher efficacy than known oxyntomodulin peptides.

Example 3 in vivo Activity assay of oxyntomodulin derivatives

To measure the in vivo therapeutic activity of oxyntomodulin peptide derivatives, changes in food intake of ob/ob mice by administration of oxyntomodulin peptide derivatives were examined-using native oxyntomodulin peptides as controls.

Specifically, obese diabetic ob/ob mice, which are commonly used to test the efficacy of therapeutic agents for obesity and diabetes, were fasted for 16 hours and given 1 or 10mg/kg oxyntomodulin or the oxyntomodulin derivative of 0.02, 0.1, 1 or 10mg/kg seq ID No. 2. Then, food intake was observed for 2 hours (fig. 1). FIG. 1 is a graph showing changes in food intake according to the administration dose of oxyntomodulin or an oxyntomodulin derivative. As shown in FIG. 1, administration of 1mg/kg of oxyntomodulin derivative showed more excellent inhibitory effect on food intake than administration of 10mg/kg of oxyntomodulin derivative.

In conclusion, the oxyntomodulin derivative of the present invention has an anti-obesity effect much higher than that of the wild-type oxyntomodulin, even if administered at a lower dose, which indicates that the wild-type oxyntomodulin shows a lower anti-obesity effect and should be improved by the problem of administration at a high dose three times a day.

Example 4: preparation of conjugate comprising oxyntomodulin and immunoglobulin Fc

First, in order to perform pegylation of lysine residue at position 30 of amino acid sequence of oxyntomodulin (SEQ ID No.1) with 3.4K propion ald (2) PEG (PEG with two propionaldehyde groups, NOF, japan), oxyntomodulin and 3.4K propion ald (2) PEG were pegylated at 1: 12 molar ratio, protein concentration of 5mg/ml at 4 ℃ for 4.5 hours. At this time, the reaction was carried out in a solvent mixture of 100mM sodium borate buffer (pH 9.0) and 45% isopropanol, and 20mM sodium cyanoborohydride (SCB, NaCNBH3), NaCNBH₃) As a reducing agent. After completion of the reaction, the reaction mixture was applied to SOURCE S (XK16, Amersham Biosciences) to purify a polymer having a single polymerizationAcid-regulated peptide of glycolylated lysine (column: SOURCES (XK16, Amersham Biosciences), flow rate: 2.0ml/min, gradient: A0 → 3% 1min B → 40% 222min B (A: 20mM sodium citrate, pH 3.0+ 45% ethanol, B: A +1M KCl)) (FIG. 2 a). FIG. 2a is a graph showing the results of purifying a monopegylated oxyntomodulin peptide by SOURCE S purification column. The monopegylation of the eluted peaks was detected by SDS-PAGE and lysine selectivity by peptide mapping with Asp-N protease (FIG. 2 b). FIG. 2b is a graph showing the results of peptide mapping of purified monopegylated oxyntomodulin.

Next, the purified mono-pegylated oxyntomodulin and immunoglobulin Fc were mixed at a ratio of 1: 10 molar ratio, 20mg/ml protein concentration at 4 ℃ for 16 hours. At this time, the reaction was carried out in 100mM potassium phosphate buffer (pH6.0), and 20mM SCB was added thereto as a reducing agent. After completion of the reaction, the reaction mixture was applied to a SOURCE 15Q purification column to purify a conjugate comprising oxyntomodulin and immunoglobulin Fc (column: SOURCE 15Q (XK16, Amersham Biosciences), flow rate: 2.0ml/min, gradient: A0 → 20% 100min B (A: 20mM Tris-HCl, pH 7.5, B: A +1M NaCl)) (FIG. 2 c). Fig. 2c is a graph showing the result of purifying a conjugate comprising oxyntomodulin and immunoglobulin Fc.

Example 5: preparation of conjugate comprising oxyntomodulin derivative (SEQ ID NO.29) and immunoglobulin Fc

First, in order to perform pegylation of the lysine residue at position 30 of the amino acid sequence of the oxyntomodulin derivative (SEQ ID No.29) with 3.4K propionaald (2) PEG, the oxyntomodulin (SEQ ID No.29) and 3.4K propionaald (2) PEG were pegylated at 1: 12 molar ratio, protein concentration of 5mg/ml at 4 ℃ for 4.5 hours. At this time, the reaction was carried out in a solvent mixture of 100mM sodium borate buffer (pH 9.0) and 45% isopropyl alcohol, and 20mM SCB was added thereto as a reducing agent. After completion of the reaction, the reaction mixture was applied to SOURCES to purify the oxyntomodulin peptide derivative having monopegylated lysine (column: SOURCE S (XK16, Amersham Biosciences), flow rate: 2.0ml/min, gradient: A0 → 3% 1min B → 40% 222min B (A: 20mM sodium citrate, pH 3.0+ 45% ethanol, B: A +1M KCl)) (FIG. 3 a). FIG. 3a is a graph showing the results of purifying a monopegylated oxyntomodulin peptide derivative (SEQ ID NO.29) by a SOURCE S purification column.

Next, the purified mono-pegylated oxyntomodulin derivative (SEQ ID No.29) and immunoglobulin Fc were combined at 1: 10 molar ratio, 20mg/ml protein concentration at 4 ℃ for 16 hours. At this time, the reaction was carried out in 100mM potassium phosphate buffer (pH6.0), and 20mM SCB was added thereto as a reducing agent. After completion of the reaction, the reaction mixture was applied to a SOURCE 15Q purification column to purify a conjugate comprising the oxyntomodulin peptide derivative (SEQ ID NO: 29) and immunoglobulin Fc (column: SOURCE 15Q, flow rate: 2.0ml/min, gradient: A0 → 20% 100min B (A: 20mM Tris-HCl, pH 7.5, B: A +1M NaCl)) (FIG. 3B). FIG. 3b is a graph showing the result of purifying a conjugate comprising an oxyntomodulin derivative (SEQ ID NO.29) and immunoglobulin Fc.

Example 6: preparation of conjugate comprising oxyntomodulin derivative (SEQ ID NO.30) and immunoglobulin Fc

First, in order to perform pegylation of lysine residue at position 30 of amino acid sequence of oxyntomodulin derivative (SEQ ID No.30) with 3.4K propionaald (2) PEG, oxyntomodulin (SEQ ID No.30) and 3.4K propionaald (2) PEG were pegylated at 1: 15 molar ratio, protein concentration 3mg/ml at 4 ℃ for 4.5 hours. At this time, the reaction was carried out in a solvent mixture of 100mM HEPES buffer (pH 7.5) and 45% isopropyl alcohol, and 20mM SCB was added thereto as a reducing agent. After completion of the reaction, the reaction mixture was applied to a SOURCES purification column to purify the oxyntomodulin peptide derivative having monopegylated lysine (column: SOURCE S, flow rate: 2.0ml/min, gradient: A0 → 3% 1min B → 40% 222min B (A: 20mM sodium citrate, pH 3.0+ 45% ethanol, B: A +1M KCl)) (FIG. 4 a). FIG. 4a is a graph showing the results of purifying a monopegylated oxyntomodulin peptide derivative (SEQ ID NO.30) by a SOURCE S purification column. The monopegylation of the eluted peaks was detected by SDS-PAGE and lysine selectivity by peptide mapping with Asp-N protease (FIG. 4 b). FIG. 4b is a graph showing the results of peptide mapping of the purified mono-pegylated oxyntomodulin peptide derivative (SEQ ID NO. 30).

Next, the purified mono-pegylated oxyntomodulin derivative (SEQ ID No.30) and immunoglobulin Fc were combined at a ratio of 1: 10 molar ratio, 20mg/ml protein concentration at 4 ℃ for 16 hours. At this time, the reaction was carried out in 100mM potassium phosphate buffer (pH6.0), and 20mM SCB was added thereto as a reducing agent. After completion of the reaction, the reaction mixture was applied to a SOURCE 15Q purification column to purify a conjugate comprising the oxyntomodulin peptide derivative (SEQ ID NO.30) and immunoglobulin Fc (column: SOURCE 15Q, flow rate: 2.0ml/min, gradient: A0 → 20% 100min B (A: 20mM Tris-HCl, pH 7.5, B: A +1M NaCl)) (FIG. 4 c). FIG. 4c is a graph showing the result of purifying a conjugate comprising an oxyntomodulin derivative (SEQ ID NO.30) and immunoglobulin Fc.

Example 7: preparation of conjugate comprising oxyntomodulin derivative (SEQ ID NO.31) and immunoglobulin Fc

First, in order to perform pegylation of lysine residue at position 30 of amino acid sequence of oxyntomodulin derivative (SEQ ID No.31) with 3.4K propionaald (2) PEG, oxyntomodulin (SEQ ID No.31) and 3.4K propionaald (2) PEG were pegylated at 1: 15 molar ratio, protein concentration 3mg/ml at 4 ℃ for 4.5 hours. At this time, the reaction was carried out in a solvent mixture of 100mM HEPES buffer (pH 7.5) and 45% isopropyl alcohol, and 20mM SCB was added thereto as a reducing agent. After completion of the reaction, the reaction mixture was applied to a SOURCES purification column to purify the oxyntomodulin peptide derivative having monopegylated lysine (column: SOURCE S, flow rate: 2.0ml/min, gradient: A0 → 3% 1min B → 40% 222min B (A: 20mM sodium citrate, pH 3.0+ 45% ethanol, B: A +1M KCl)) (FIG. 5 a). FIG. 5a is a graph showing the results of purifying a monopegylated oxyntomodulin peptide derivative (SEQ ID NO.31) by a SOURCE S purification column.

Next, the purified mono-pegylated oxyntomodulin derivative (SEQ ID No.31) and immunoglobulin Fc were combined at a ratio of 1: 10 molar ratio, 20mg/ml protein concentration at 4 ℃ for 16 hours. At this time, the reaction was carried out in 100mM potassium phosphate buffer (pH6.0), and 20mM SCB was added thereto as a reducing agent. After completion of the reaction, the reaction mixture was applied to a SOURCE 15Q purification column to purify a conjugate comprising the oxyntomodulin peptide derivative (SEQ ID NO: 31) and immunoglobulin Fc (column: SOURCE 15Q, flow rate: 2.0ml/min, gradient: A0 → 20% 100min B (A: 20mM Tris-HCl, pH 7.5, B: A +1M NaCl)) (FIG. 5B). FIG. 5b is a graph showing the result of purifying a conjugate comprising an oxyntomodulin derivative (SEQ ID NO.31) and immunoglobulin Fc.

Example 8: preparation of conjugate comprising oxyntomodulin derivative (SEQ ID NO.2) and immunoglobulin Fc

First, in order to perform pegylation of the lysine residue at position 30 of the amino acid sequence of the oxyntomodulin derivative (SEQ ID No.2) with 3.4K propionoald (2) PEG, the oxyntomodulin (SEQ ID No.2) and 3.4 kpropitoald (2) PEG were pegylated at 1: 10 molar ratio, 3mg/ml protein concentration at 4 ℃ for 4 hours. At this time, the reaction was carried out in a solvent mixture of 100mM HEPES buffer (pH 7.5) and 45% isopropyl alcohol, and 20mM SCB was added thereto as a reducing agent. After completion of the reaction, the reaction mixture was applied to a SOURCE S purification column to purify the oxyntomodulin peptide derivative having monopegylated lysine (column: SOURCE S, flow rate: 2.0ml/min, gradient: A0 → 3% 1min B → 40% 222min B (A: 20mM sodium citrate, pH 3.0+ 45% ethanol, B: A +1M KCl)) (FIG. 6 a). FIG. 6a is a graph showing the results of purifying a monopegylated oxyntomodulin peptide derivative (SEQ ID NO.2) by a SOURCE S purification column. The monopegylation of the eluted peaks was detected by SDS-PAGE and lysine selectivity by peptide mapping with Asp-N protease (FIG. 6 b). FIG. 6b is a graph showing the results of peptide mapping of the purified mono-pegylated oxyntomodulin peptide derivative (SEQ ID NO. 2).

Next, the purified mono-pegylated oxyntomodulin derivative (SEQ ID No.2) and immunoglobulin Fc were mixed at a ratio of 1: 8 molar ratio, 20mg/ml protein concentration at 4 ℃ for 16 hours. At this time, the reaction was carried out in 100mM potassium phosphate buffer (pH6.0), and 20mM SCB was added thereto as a reducing agent. After completion of the reaction, the reaction mixture was applied to a SOURCE 15Q purification column (column: SOURCE 15Q, flow rate: 2.0ml/min, gradient: A0 → 4% 1min B → 20% 80min B (A: 20mM Tris-HCl, pH 7.5, B: A +1M NaCl)) (FIG. 6c) and a SOURCE ISO purification column (column: SOURCE ISO (XK16, Amersham Biosciences), flow rate: 2.0ml/min, gradient: A0 → 100% 100min B, (A: 20mM Tris-HCl, pH 7.5, B: A +1.3MAS)) (FIG. 6d) to purify the conjugate comprising the oxyntomodulin peptide derivative (SEQ ID NO.2) and immunoglobulin Fc. FIG. 6c is a graph showing the result of purifying a conjugate comprising an oxyntomodulin derivative (SEQ ID No.2) and immunoglobulin Fc through a Source ISO purification column, and FIG. 6d is a graph showing the result of purifying a conjugate comprising an oxyntomodulin derivative (SEQ ID No.2) and immunoglobulin Fc through a Source ISO purification column.

Example 9: preparation of conjugate comprising oxyntomodulin derivative (SEQ ID NO.3) and immunoglobulin Fc

First, in order to perform pegylation of a lysine residue at position 27 of the amino acid sequence of an oxyntomodulin derivative (SEQ ID No.3) with 3.4K propionoald (2) PEG, oxyntomodulin (SEQ ID No.3) and 3.4 kppropionoald (2) PEG were pegylated at 1: 10 molar ratio, 3mg/ml protein concentration at 4 ℃ for 4 hours. At this time, the reaction was carried out in a solvent mixture of 100mM HEPES buffer (pH 7.5) and 45% isopropyl alcohol, and 20mM SCB was added thereto as a reducing agent. After completion of the reaction, the reaction mixture was applied to a SOURCE S purification column to purify the oxyntomodulin peptide derivative having monopegylated lysine (column: SOURCE S, flow rate: 2.0ml/min, gradient: A0 → 3% 1min B → 40% 222min B (A: 20mM sodium citrate, pH 3.0+ 45% ethanol, B: A +1M KCl)) (FIG. 7 a). FIG. 7a is a graph showing the results of purifying a monopegylated oxyntomodulin peptide derivative (SEQ ID NO.3) by a SOURCE S purification column. The monopegylation of the eluted peaks was detected by SDS-PAGE and lysine selectivity by peptide mapping with Asp-N protease (FIG. 7 b). FIG. 7b is a graph showing the results of peptide mapping of the purified mono-pegylated oxyntomodulin peptide derivative (SEQ ID NO. 3).

Next, the purified mono-pegylated oxyntomodulin derivative (SEQ ID No.3) and immunoglobulin Fc were mixed at a ratio of 1: 8 molar ratio, 20mg/ml protein concentration at 4 ℃ for 16 hours. At this time, the reaction was carried out in 100mM potassium phosphate buffer (pH6.0), and 20mM SCB was added thereto as a reducing agent. After completion of the reaction, the reaction mixture was applied to a Butyl FF purification column (column: Butyl FF (XK16, Amersham Biosciences), flow rate: 2.0ml/min, gradient: B0 → 100% 5min A (A: 20mM Tris-HCl, pH 7.5, B: A +1.5M NaCl)) (FIG. 7c) and a SOURCE 15Q purification column (column: SOURCE 15Q, flow rate: 2.0ml/min, gradient: A0 → 4% 1min B → 20% 80min B (A: 20mM Tris-HCl, pH 7.5, B: A +1M NaCl)) (FIG. 7d) to purify the conjugate comprising the oxyntomodulin peptide derivative (SEQ ID NO.3) and immunoglobulin Fc. FIG. 7c is a graph showing the result of purifying a conjugate comprising an oxyntomodulin derivative (SEQ ID No.3) and immunoglobulin Fc through a Butyl FF purification column, and FIG. 7d is a graph showing the result of purifying a conjugate comprising an oxyntomodulin derivative (SEQ ID No.3) and immunoglobulin Fc through a SOURCE 15Q purification column.

Example 10: preparation of conjugate comprising oxyntomodulin derivative (SEQ ID NO.23) and immunoglobulin Fc

First, in order to perform pegylation of the cysteine residue at position 24 of the amino acid sequence of the oxyntomodulin derivative (SEQ ID No.23) with MAL-10K-ALD PEG (nof., japan), the oxyntomodulin (SEQ ID No.3) and MAL-10K-ALD PEG were pegylated at 1: 3 molar ratio, protein concentration of 3mg/ml at room temperature for 3 hours. At this time, the reaction was carried out in 50mM Tris buffer (pH 8.0) and 45% isopropanol, and 1M guanidine was added thereto. After completion of the reaction, the reaction mixture was applied to a SOURCE S purification column to purify the oxyntomodulin peptide derivative having monopegylated cysteine (column: SOURCE S, flow rate: 2.0ml/min, gradient: A0 → 100% 50min B (A: 20mM sodium citrate, pH 3.0+ 45% ethanol, B: A +1M KCl)) (FIG. 8 a). FIG. 8a is a graph showing the results of purifying a monopegylated oxyntomodulin peptide derivative (SEQ ID NO.23) by a SOURCE S purification column.

Next, the purified mono-pegylated oxyntomodulin derivative (SEQ ID No.23) and immunoglobulin Fc were combined at 1: 5 molar ratio, protein concentration 20mg/ml at 4 ℃ for 16 hours. At this time, the reaction was carried out in 100mM potassium phosphate buffer (pH6.0), and 20mM SCB was added thereto as a reducing agent. After completion of the reaction, the reaction mixture was applied to a SOURCE 15Q purification column (column: SOURCE 15Q, flow rate: 2.0ml/min, gradient: A0 → 4% 1min B → 20% 80min B (A: 20mM Tris-HCl, pH 7.5, B: A +1M NaCl)) (FIG. 8B) and a SOURCE ISO purification column (column: SOURCE ISO, flow rate: 2.0ml/min, gradient: B0 → 100% 100min A, (A: 20mM Tris-HCl, pH 7.5, B: A +1.1M AS)) (FIG. 8c) to purify the conjugate comprising the oxyntomodulin peptide derivative (SEQ ID NO.23) and immunoglobulin Fc. FIG. 8b is a graph showing the result of purifying a conjugate comprising an oxyntomodulin derivative (SEQ ID No.23) and immunoglobulin Fc through a SOURCE 15Q purification column, and FIG. 8c is a graph showing the result of purifying a conjugate comprising an oxyntomodulin derivative (SEQ ID No.23) and immunoglobulin Fc through a Source ISO purification column.

Example 11: preparation of conjugate comprising oxyntomodulin derivative (SEQ ID NO.24) and immunoglobulin Fc

First, in order to PEGylate the cysteine residue at position 30 of the amino acid sequence of the oxyntomodulin derivative (SEQ ID NO.24) with MAL-10K-ALD PEG, the oxyntomodulin (SEQ ID NO.24) and MAL-10K-ALD PEG were combined in a ratio of 1: 3 molar ratio, protein concentration of 3mg/ml at room temperature for 3 hours. At this time, the reaction was carried out in 50mM Tris buffer (pH 8.0) and 45% isopropanol, and 1M guanidine was added thereto. After completion of the reaction, the reaction mixture was applied to a SOURCE S purification column to purify the oxyntomodulin peptide derivative having monopegylated cysteine (column: SOURCE S, flow rate: 2.0ml/min, gradient: A0 → 100% 50min B (A: 20mM sodium citrate, pH 3.0+ 45% ethanol, B: A +1M KCl)) (FIG. 9 a). FIG. 9a is a graph showing the results of purifying a monopegylated oxyntomodulin peptide derivative (SEQ ID NO.24) by a SOURCE S purification column.

Next, the purified mono-pegylated oxyntomodulin derivative (SEQ ID No.24) and immunoglobulin Fc were combined at a ratio of 1: 5 molar ratio, protein concentration 20mg/ml at 4 ℃ for 16 hours. At this time, the reaction was carried out in 100mM potassium phosphate buffer (pH6.0), and 20mM SCB was added thereto as a reducing agent. After completion of the reaction, the reaction mixture was applied to a SOURCE 15Q purification column (column: SOURCE 15Q, flow rate: 2.0ml/min, gradient: A0 → 4% 1min B → 20% 80min B (A: 20mM Tris-HCl, pH 7.5, B: A +1M NaCl)) (FIG. 9B) and a SOURCE ISO purification column (column: SOURCE ISO, flow rate: 2.0ml/min, gradient: B0 → 100% 100min A, (A: 20mM Tris-HCl, pH 7.5, B: A +1.1M AS)) (FIG. 9c) to purify the conjugate comprising the oxyntomodulin peptide derivative (SEQ ID NO.24) and immunoglobulin Fc. FIG. 9b is a graph showing the result of purifying a conjugate comprising an oxyntomodulin derivative (SEQ ID No.24) and immunoglobulin Fc through a SOURCE 15Q purification column, and FIG. 9c is a graph showing the result of purifying a conjugate comprising an oxyntomodulin derivative (SEQ ID No.24) and immunoglobulin Fc through a Source ISO purification column.

Example 12: preparation of conjugate comprising oxyntomodulin derivative (SEQ ID NO.25) and immunoglobulin Fc

First, in order to PEGylate the cysteine residue at position 30 of the amino acid sequence of the oxyntomodulin derivative (SEQ ID NO.25) with MAL-10K-ALD PEG, the oxyntomodulin (SEQ ID NO.25) and MAL-10K-ALD PEG were combined in a ratio of 1: 3 molar ratio, protein concentration of 3mg/ml at room temperature for 3 hours. At this time, the reaction was carried out in 50mM Tris buffer (pH 8.0), and 1M guanidine was added thereto. After completion of the reaction, the reaction mixture was applied to a SOURCE S purification column to purify the oxyntomodulin peptide derivative having monopegylated cysteine (column: SOURCE S, flow rate: 2.0ml/min, gradient: A0 → 100% 50min B (A: 20mM sodium citrate, pH 3.0+ 45% ethanol, B: A +1M KCl)) (FIG. 10 a). FIG. 10a is a graph showing the result of purifying a mono-pegylated oxyntomodulin peptide derivative (SEQ ID NO.25) through a SOURCES purification column.

Next, the purified mono-pegylated oxyntomodulin derivative (SEQ ID No.25) and immunoglobulin Fc were combined at 1: 5 molar ratio, protein concentration 20mg/ml at 4 ℃ for 16 hours. At this time, the reaction was carried out in 100mM potassium phosphate buffer (pH6.0), and 20mM SCB was added thereto as a reducing agent. After completion of the reaction, the reaction mixture was applied to a SOURCE 15Q purification column (column: SOURCE 15Q, flow rate: 2.0ml/min, gradient: A0 → 4% 1min B → 20% 80min B (A: 20mM Tris-HCl, pH 7.5, B: A +1M NaCl)) (FIG. 10B) and a SOURCE ISO purification column (column: SOURCE ISO, flow rate: 2.0ml/min, gradient: B0 → 100% 100min A, (A: 20mM Tris-HCl, pH 7.5, B: A +1.1M AS)) (FIG. 10c) to purify the conjugate comprising the oxyntomodulin peptide derivative (SEQ ID NO.25) and immunoglobulin Fc. FIG. 10b is a graph showing the result of purifying a conjugate comprising an oxyntomodulin derivative (SEQ ID No.25) and immunoglobulin Fc through a SOURCE 15Q purification column, and FIG. 10c is a graph showing the result of purifying a conjugate comprising an oxyntomodulin derivative (SEQ ID No.25) and immunoglobulin Fc through a Source ISO purification column.

Example 13: preparation of conjugate comprising oxyntomodulin derivative (SEQ ID NO.28) and immunoglobulin Fc

First, in order to perform pegylation of the lysine residue at position 20 of the amino acid sequence of the oxyntomodulin derivative (SEQ ID No.28) with 3.4K propionaald (2) PEG, the oxyntomodulin (SEQ ID No.28) and MAL-10K-ALD PEG were pegylated at 1: 5 molar ratio, protein concentration of 3mg/ml at 4 ℃ for 3 hours. At this time, the reaction was carried out in 50mM sodium borate buffer (pH 9.0), and 2M guanidine was added thereto. After completion of the reaction, the reaction mixture was applied to a SOURCE S purification column to purify the oxyntomodulin peptide derivative having monopegylated lysine (column: SOURCE S, flow rate: 2.0ml/min, gradient: A0 → 3% 1min B → 40% 222min B (A: 20mM sodium citrate, pH 3.0+ 45% ethanol, B: A +1M KCl)) (FIG. 11 a). FIG. 11a is a graph showing the results of purifying a monopegylated oxyntomodulin peptide derivative (SEQ ID NO.28) by a SOURCE S purification column.

Next, the purified mono-pegylated oxyntomodulin derivative (SEQ ID No.28) and immunoglobulin Fc were combined at a ratio of 1: 10 molar ratio, 20mg/ml protein concentration at 4 ℃ for 16 hours. At this time, the reaction was carried out in 100mM potassium phosphate buffer (pH6.0), and 20mM SCB was added thereto as a reducing agent. After completion of the reaction, the reaction mixture was applied to a SOURCE 15Q purification column (column: SOURCE 15Q, flow rate: 2.0ml/min, gradient: A0 → 4% 1min B → 20% 80min B (A: 20mM Tris-HCl, pH 7.5, B: A +1M NaCl)) (FIG. 11B) and a SOURCE ISO purification column (column: SOURCE ISO, flow rate: 2.0ml/min, gradient: B0 → 100% 100min A, (A: 20mM Tris-HCl, pH 7.5, B: A +1.1M AS)) (FIG. 11c) to purify the conjugate comprising the oxyntomodulin peptide derivative (SEQ ID NO.28) and immunoglobulin Fc. FIG. 11b is a graph showing the result of purifying a conjugate comprising an oxyntomodulin derivative (SEQ ID No.28) and immunoglobulin Fc through a SOURCE 15Q purification column, and FIG. 11c is a graph showing the result of purifying a conjugate comprising an oxyntomodulin derivative (SEQ ID No.28) and immunoglobulin Fc through a Source ISO purification column.

Example 14: preparation of conjugate comprising oxyntomodulin derivative (SEQ ID NO.32) and immunoglobulin Fc

First, in order to PEGylate the cysteine residue at position 30 of the amino acid sequence of the oxyntomodulin derivative (SEQ ID NO.32) with MAL-10K-ALD PEG, the oxyntomodulin (SEQ ID NO.32) and MAL-10K-ALD PEG were combined in a ratio of 1: 3, protein concentration of 1mg/ml, at room temperature for 3 hours. At this time, the reaction was carried out in 50mM Tris buffer (pH 8.0), and 2M guanidine was added thereto. After completion of the reaction, the reaction mixture was applied to a SOURCE S purification column to purify the oxyntomodulin peptide derivative having monopegylated cysteine (column: SOURCE S, flow rate: 2.0ml/min, gradient: A0 → 100% 50min B (A: 20mM sodium citrate, pH 3.0+ 45% ethanol, B: A +1M KCl)).

Next, the purified mono-pegylated oxyntomodulin derivative (SEQ ID No.32) and immunoglobulin Fc were combined at a ratio of 1: 8 molar ratio, 20mg/ml protein concentration at 4 ℃ for 16 hours. At this time, the reaction was carried out in 100mM potassium phosphate buffer (pH6.0), and 20mM SCB was added thereto as a reducing agent. After completion of the reaction, the reaction mixture was applied to a SOURCE 15Q purification column (column: SOURCE 15Q, flow rate: 2.0ml/min, gradient: A0 → 4% 1min B → 20% 80min B (A: 20mM Tris-HCl, pH 7.5, B: A +1M NaCl)) and a SOURCE ISO purification column (column: SOURCE ISO, flow rate: 2.0ml/min, gradient: B0 → 100% 100min A, (A: 20mM Tris-HCl, pH 7.5, B: A +1.1M AS)) to purify the conjugate comprising the oxyntomodulin peptide derivative (SEQ ID NO.32) and immunoglobulin Fc.

Example 15: preparation of conjugate comprising oxyntomodulin derivative (SEQ ID NO.33) and immunoglobulin Fc

First, in order to PEGylate the cysteine residue at position 30 of the amino acid sequence of the oxyntomodulin derivative (SEQ ID NO.33) with MAL-10K-ALD PEG, the oxyntomodulin (SEQ ID NO.33) and MAL-10K-ALD PEG were combined in a ratio of 1: 1 molar ratio, 1mg/ml protein concentration at room temperature for 3 hours. At this time, the reaction was carried out in 50mM Tris buffer (pH 8.0), and 2M guanidine was added thereto. After completion of the reaction, the reaction mixture was applied to a SOURCE S purification column to purify the oxyntomodulin peptide derivative having monopegylated cysteine (column: SOURCE S, flow rate: 2.0ml/min, gradient: A0 → 100% 50min B (A: 20mM sodium citrate, pH 3.0+ 45% ethanol, B: A +1M KCl)).

Next, the purified mono-pegylated oxyntomodulin derivative (SEQ ID No.33) and immunoglobulin Fc were combined at a ratio of 1: 5 molar ratio, protein concentration 20mg/ml at 4 ℃ for 16 hours. At this time, the reaction was carried out in 100mM potassium phosphate buffer (pH6.0), and 20mM SCB was added thereto as a reducing agent. After completion of the reaction, the reaction mixture was applied to a SOURCE 15Q purification column (column: SOURCE 15Q, flow rate: 2.0ml/min, gradient: A0 → 4% 1min B → 20% 80min B (A: 20mM Tris-HCl, pH 7.5, B: A +1M NaCl)) and a SOURCE ISO purification column (column: SOURCE ISO, flow rate: 2.0ml/min, gradient: B0 → 100% 100min A, (A: 20mM Tris-HCl, pH 7.5, B: A +1.1M AS)) to purify the conjugate comprising the oxyntomodulin peptide derivative (SEQ ID NO.33) and immunoglobulin Fc.

Example 16: preparation of conjugate comprising oxyntomodulin derivative (SEQ ID NO.34) and immunoglobulin Fc

First, in order to PEGylate the cysteine residue at position 30 of the amino acid sequence of the oxyntomodulin derivative (SEQ ID NO.34) with MAL-10K-ALD PEG, the oxyntomodulin (SEQ ID NO.34) and MAL-10K-ALD PEG were combined in a ratio of 1: 1 molar ratio, 3mg/ml protein concentration at room temperature for 3 hours. At this time, the reaction was carried out in 50mM Tris buffer (pH 8.0), and 1M guanidine was added thereto. After completion of the reaction, the reaction mixture was applied to a SOURCE S purification column to purify the oxyntomodulin peptide derivative having monopegylated cysteine (column: SOURCE S, flow rate: 2.0ml/min, gradient: A0 → 100% 50min B (A: 20mM sodium citrate, pH 3.0+ 45% ethanol, B: A +1M KCl)).

Next, the purified mono-pegylated oxyntomodulin derivative (SEQ ID No.34) and immunoglobulin Fc were combined at 1: 5 molar ratio, protein concentration 20mg/ml at 4 ℃ for 16 hours. At this time, the reaction was carried out in 100mM potassium phosphate buffer (pH6.0), and 20mM SCB was added thereto as a reducing agent. After completion of the reaction, the reaction mixture was applied to a SOURCE 15Q purification column (column: SOURCE 15Q, flow rate: 2.0ml/min, gradient: A0 → 4% 1min B → 20% 80min B (A: 20mM Tris-HCl, pH 7.5, B: A +1M NaCl)) and a SOURCE ISO purification column (column: SOURCE ISO, flow rate: 2.0ml/min, gradient: B0 → 100% 100min A, (A: 20mM Tris-HCl, pH 7.5, B: A +1.1M AS)) to purify the conjugate comprising the oxyntomodulin peptide derivative (SEQ ID NO.34) and immunoglobulin Fc.

Example 17: in vitro Activity of oxyntomodulin derivative-immunoglobulin Fc conjugates

In order to measure the anti-obesity efficacy of the conjugates comprising oxyntomodulin or an oxyntomodulin derivative and immunoglobulin Fc prepared in the above examples, experiments were performed in the same manner as in example 2-2.

Specifically, each of the transformants prepared in examples 1-1 and 1-2 was subcultured twice or three times a week and plated in 96-well plates at 1X 10⁵Was aliquoted, and then cultured for 24 hours. Each transformant was washed with KRB buffer and suspended in 40ml KRB buffer containing 1mM IBMX and left at room temperature for 5 minutes. GLP-1, glucagon and oxyntomodulin derivative (SEQ ID NO.23, 24, 25, 32, 33 or 34) -immunoglobulin Fc conjugates were diluted from 1000nM to 0.02nM by 5-fold serial dilution and 40mL each was added to each transformant and incubated in CO₂Incubators were incubated at 37 ℃ for 1 hour. Then, 20mL of cell lysis buffer was added for cell lysis, and the cell lysate was applied to a cAMP assay kit (molecular sieve, USA) to measure cAMP concentration using Victor (Perkin Elmer, USA). From which EC is calculated₅₀Values, and compared to each other (table 3).

TABLE 3

In vitro Activity of oxyntomodulin derivative-immunoglobulin Fc conjugates

As shown in Table 3, oxyntomodulin peptide derivative-immunoglobulin Fc conjugates were found to exhibit in vitro activity at GLP-1 and glucagon receptors.

Example 18: in vivo Activity of oxyntomodulin derivative-immunoglobulin conjugate

Whether the oxyntomodulin derivative-immunoglobulin Fc conjugate showed an excellent in vivo weight loss effect was examined.

Specifically, normal C57BL/6 mice of 6 weeks of age were fed 60kcal of high fat diet for 24 weeks to increase their body weight by about 50g on average, and the oxyntomodulin peptide derivative (SEQ ID NO.23, 24 or 25) -immunoglobulin Fc conjugate was subcutaneously administered at a dose of 0.03 or 0.06 mg/kg/week for 3 weeks. Thereafter, changes in body weight of the mice were measured (fig. 12 and 13). Fig. 12 and 13 are graphs showing body weight changes of mice according to the kind of oxyntomodulin derivative-immunoglobulin Fc conjugate and the administration dose. As shown in fig. 12 and 13, when the administration dose of oxyntomodulin derivative-immunoglobulin Fc conjugate was increased, the body weight decreased in direct proportion, even though there was a difference between the species of oxyntomodulin derivative-immunoglobulin Fc conjugate, indicating that the oxyntomodulin derivative-immunoglobulin Fc conjugate lost body weight in a dose-dependent manner.

Sequence listing

<110> Korea scientific Co., Ltd

<120> conjugate comprising oxyntomodulin and immunoglobulin fragment, and use thereof

<130> OPA12063/CN-DIV1

<150> KR 10-2011-0058852

<151> 2011-06-17

<160> 53

<170> KopatentIn 2.0

<210> 1

<211> 37

<212> PRT

<213> oxyntomodulin

<400> 1

His Ser Gln Gly Thr Phe Thr Ser Asp Tyr Ser Lys Tyr Leu Asp Ser

1 5 10 15

Arg Arg Ala Gln Asp Phe Val Gln Trp Leu Met Asn Thr Lys Arg Asn

20 25 30

Arg Asn Asn Ile Ala

35

<210> 2

<211> 37

<212> PRT

<213> oxyntomodulin derivative

<220>

<221> variants

<222> (1)

<223> the "H" means a derivative of histidine, 4-imidazolylacetyl.

<400> 2

His Ser Gln Gly Thr Phe Thr Ser Asp Tyr Ser Lys Tyr Leu Asp Glu

1 5 10 15

Glu Ala Val Arg Leu Phe Ile Glu Trp Leu Met Asn Thr Lys Arg Asn

20 25 30

Arg Asn Asn Ile Ala

35

<210> 3

<211> 39

<212> PRT

<213> oxyntomodulin derivative

<220>

<221> variants

<222> (1)

<223> the "H" means a derivative of histidine, 4-imidazolylacetyl.

<400> 3

His Ser Gln Gly Thr Phe Thr Ser Asp Tyr Ser Lys Tyr Leu Asp Glu

1 5 10 15

Arg Arg Ala Gln Asp Phe Val Ala Trp Leu Lys Asn Thr Gly Pro Ser

20 25 30

Ser Gly Ala Pro Pro Pro Ser

35

<210> 4

<211> 39

<212> PRT

<213> oxyntomodulin derivative

<220>

<221> variants

<222> (1)

<223> the "H" means a derivative of histidine, 4-imidazolylacetyl.

<400> 4

His Gly Gln Gly Thr Phe Thr Ser Asp Tyr Ser Arg Tyr Leu Glu Glu

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Glu Ala Val Arg Leu Phe Ile Glu Trp Leu Lys Asn Gly Gly Pro Ser

20 25 30

Ser Gly Ala Pro Pro Pro Ser

35

<210> 5

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<212> PRT

<213> oxyntomodulin derivative

<220>

<221> variants

<222> (1)

<223> the "H" means a derivative of histidine, 4-imidazolylacetyl.

<400> 5

His Gly Gln Gly Thr Phe Thr Ser Asp Tyr Ser Arg Gln Met Glu Glu

1 5 10 15

Glu Ala Val Arg Leu Phe Ile Glu Trp Leu Lys Asn Gly Gly Pro Ser

20 25 30

Ser Gly Ala Pro Pro Pro Ser

35

<210> 6

<211> 42

<212> PRT

<213> oxyntomodulin derivative

<220>

<221> variants

<222> (1)

<223> the "H" means a derivative of histidine, 4-imidazolylacetyl.

<400> 6

His Gly Glu Gly Thr Phe Thr Ser Asp Leu Ser Arg Gln Met Glu Glu

1 5 10 15

Glu Ala Val Arg Leu Phe Ile Glu Trp Ala Ala His Ser Gln Gly Thr

20 25 30

Phe Thr Ser Asp Tyr Ser Lys Tyr Leu Asp

35 40

<210> 7

<211> 30

<212> PRT

<213> oxyntomodulin derivative

<220>

<221> variants

<222> (1)

<223> the "H" means a derivative of histidine, 4-imidazolylacetyl.

<400> 7

His Ser Gln Gly Thr Phe Thr Ser Asp Tyr Ser Arg Tyr Leu Asp Glu

1 5 10 15

Glu Ala Val Arg Leu Phe Ile Glu Trp Leu Met Asn Thr Lys

20 25 30

<210> 8

<211> 29

<212> PRT

<213> oxyntomodulin derivative

<220>

<221> variants

<222> (1)

<223> the "H" means a derivative of histidine, 4-imidazolylacetyl.

<400> 8

His Ser Gln Gly Thr Phe Thr Ser Asp Leu Ser Arg Gln Leu Glu Glu

1 5 10 15

Glu Ala Val Arg Leu Phe Ile Glu Trp Leu Met Asn Lys

20 25

<210> 9

<211> 37

<212> PRT

<213> oxyntomodulin derivative

<220>

<221> variants

<222> (1)

<223> the "H" means a derivative of histidine, 4-imidazolylacetyl.

<220>

<221> variants

<222> (20)

<223> Xaa = aminoisobutyric acid

<400> 9

His Gly Gln Gly Thr Phe Thr Ser Asp Tyr Ser Arg Tyr Leu Asp Glu

1 5 10 15

Glu Ala Val Xaa Leu Phe Ile Glu Trp Leu Met Asn Thr Lys Arg Asn

20 25 30

Arg Asn Asn Ile Ala

35

<210> 10

<211> 40

<212> PRT

<213> oxyntomodulin derivative

<220>

<221> variants

<222> (1)

<223> the "H" means a derivative of histidine, 4-imidazolylacetyl.

<400> 10

His Ser Gln Gly Thr Phe Thr Ser Asp Tyr Ser Arg Gln Met Glu Glu

1 5 10 15

Glu Ala Val Arg Leu Phe Ile Glu Trp Leu Met Asn Gly Gly Pro Ser

20 25 30

Ser Gly Ala Pro Pro Pro Ser Lys

35 40

<210> 11

<211> 43

<212> PRT

<213> oxyntomodulin derivative

<220>

<221> variants

<222> (1)

<223> the "H" means a derivative of histidine, 4-imidazolylacetyl.

<400> 11

His Gly Glu Gly Thr Phe Thr Ser Asp Leu Ser Arg Gln Met Glu Glu

1 5 10 15

Glu Ala Val Arg Leu Phe Ile Glu Trp Ala Ala His Ser Gln Gly Thr

20 25 30

Phe Thr Ser Asp Tyr Ser Arg Tyr Leu Asp Lys

35 40

<210> 12

<211> 38

<212> PRT

<213> oxyntomodulin derivative

<220>

<221> variants

<222> (1)

<223> the "H" means a derivative of histidine, 4-imidazolylacetyl.

<400> 12

His Ser Gln Gly Thr Phe Thr Ser Asp Tyr Ser Arg Tyr Leu Asp Gly

1 5 10 15

Gly Gly His Gly Glu Gly Thr Phe Thr Ser Asp Leu Ser Lys Gln Met

20 25 30

Glu Glu Glu Ala Val Lys

35

<210> 13

<211> 30

<212> PRT

<213> oxyntomodulin derivative

<220>

<221> variants

<222> (1)

<223> the "H" means a derivative of histidine, 4-imidazolylacetyl.

<220>

<221> variants

<222> (16)

<223> Xaa = aminoisobutyric acid

<220>

<221> variants

<222> (20)

<223> Xaa = aminoisobutyric acid

<400> 13

His Ser Gln Gly Thr Phe Thr Ser Asp Tyr Ser Arg Tyr Leu Asp Xaa

1 5 10 15

Glu Ala Val Xaa Leu Phe Ile Glu Trp Leu Met Asn Thr Lys

20 25 30

<210> 14

<211> 37

<212> PRT

<213> oxyntomodulin derivative

<220>

<221> variants

<222> (1)

<223> the "H" means a derivative of histidine, 4-imidazolylacetyl.

<220>

<221> variants

<222> (20)

<223> Xaa = aminoisobutyric acid

<220>

<221> variants

<222> (24)

<223> Xaa = aminoisobutyric acid

<400> 14

His Gly Gln Gly Thr Phe Thr Ser Asp Tyr Ser Arg Tyr Leu Asp Glu

1 5 10 15

Glu Ala Val Xaa Leu Phe Ile Xaa Trp Leu Met Asn Thr Lys Arg Asn

20 25 30

Arg Asn Asn Ile Ala

35

<210> 15

<211> 37

<212> PRT

<213> oxyntomodulin derivative

<220>

<221> variants

<222> (1)

<223> the "H" means a derivative of histidine, 4-imidazolylacetyl.

<220>

<221> variants

<222> (24)

<223> Xaa = aminoisobutyric acid

<400> 15

His Gly Gln Gly Thr Phe Thr Ser Asp Tyr Ser Arg Tyr Leu Asp Glu

1 5 10 15

Glu Ala Val Arg Leu Phe Ile Xaa Trp Leu Met Asn Thr Lys Arg Asn

20 25 30

Arg Asn Asn Ile Ala

35

<210> 16

<211> 34

<212> PRT

<213> oxyntomodulin derivative

<220>

<221> variants

<222> (1)

<223> the "H" means a derivative of histidine, 4-imidazolylacetyl.

<400> 16

His Ser Gln Gly Thr Phe Thr Ser Asp Leu Ser Arg Gln Leu Glu Gly

1 5 10 15

Gly Gly His Ser Gln Gly Thr Phe Thr Ser Asp Leu Ser Arg Gln Leu

20 25 30

Glu Lys

<210> 17

<211> 37

<212> PRT

<213> oxyntomodulin derivative

<220>

<221> variants

<222> (1)

<223> the "H" means a derivative of histidine, 4-imidazolylacetyl.

<400> 17

His Ser Gln Gly Thr Phe Thr Ser Asp Tyr Ser Arg Tyr Leu Asp Glu

1 5 10 15

Glu Ala Val Arg Leu Phe Ile Glu Trp Ile Arg Asn Thr Lys Arg Asn

20 25 30

Arg Asn Asn Ile Ala

35

<210> 18

<211> 40

<212> PRT

<213> oxyntomodulin derivative

<220>

<221> variants

<222> (1)

<223> the "H" means a derivative of histidine, 4-imidazolylacetyl.

<400> 18

His Ser Gln Gly Thr Phe Thr Ser Asp Tyr Ser Arg Tyr Leu Asp Glu

1 5 10 15

Glu Ala Val Arg Leu Phe Ile Glu Trp Ile Arg Asn Gly Gly Pro Ser

20 25 30

Ser Gly Ala Pro Pro Pro Ser Lys

35 40

<210> 19

<211> 37

<212> PRT

<213> oxyntomodulin derivative

<220>

<221> variants

<222> (1)

<223> the "H" means a derivative of histidine, 4-imidazolylacetyl.

<400> 19

His Ser Gln Gly Thr Phe Thr Ser Asp Tyr Ser Arg Tyr Leu Asp Glu

1 5 10 15

Glu Ala Val Lys Leu Phe Ile Glu Trp Ile Arg Asn Thr Lys Arg Asn

20 25 30

Arg Asn Asn Ile Ala

35

<210> 20

<211> 40

<212> PRT

<213> oxyntomodulin derivative

<220>

<221> variants

<222> (1)

<223> the "H" means a derivative of histidine, 4-imidazolylacetyl.

<400> 20

His Ser Gln Gly Thr Phe Thr Ser Asp Tyr Ser Arg Tyr Leu Asp Glu

1 5 10 15

Glu Ala Val Lys Leu Phe Ile Glu Trp Ile Arg Asn Gly Gly Pro Ser

20 25 30

Ser Gly Ala Pro Pro Pro Ser Lys

35 40

<210> 21

<211> 37

<212> PRT

<213> oxyntomodulin derivative

<220>

<221> variants

<222> (1)

<223> the "H" means a derivative of histidine, 4-imidazolylacetyl.

<400> 21

His Ser Gln Gly Thr Phe Thr Ser Asp Tyr Ser Arg Gln Leu Glu Glu

1 5 10 15

Glu Ala Val Arg Leu Phe Ile Glu Trp Val Arg Asn Thr Lys Arg Asn

20 25 30

Arg Asn Asn Ile Ala

35

<210> 22

<211> 30

<212> PRT

<213> oxyntomodulin derivative

<220>

<221> variants

<222> (1)

<223> the "H" refers to a derivative of histidine, deaminated-histidyl.

<400> 22

His Ser Gln Gly Thr Phe Thr Ser Asp Tyr Ser Lys Tyr Leu Asp Glu

1 5 10 15

Lys Arg Ala Lys Glu Phe Val Gln Trp Leu Met Asn Thr Lys

20 25 30

<210> 23

<211> 29

<212> PRT

<213> oxyntomodulin derivative

<220>

<221> variants

<222> (2)

<223> Xaa = aminoisobutyric acid

<400> 23

His Xaa Gln Gly Thr Phe Thr Ser Asp Tyr Ser Lys Tyr Leu Asp Glu

1 5 10 15

Lys Arg Ala Lys Glu Phe Val Cys Trp Leu Met Asn Thr

20 25

<210> 24

<211> 30

<212> PRT

<213> oxyntomodulin derivative

<220>

<221> variants

<222> (2)

<223> Xaa = aminoisobutyric acid

<400> 24

His Xaa Gln Gly Thr Phe Thr Ser Asp Tyr Ser Lys Tyr Leu Asp Glu

1 5 10 15

Lys Arg Ala Lys Glu Phe Val Gln Trp Leu Met Asn Thr Cys

20 25 30

<210> 25

<211> 30

<212> PRT

<213> oxyntomodulin derivative

<220>

<221> variants

<222> (2)

<223> Xaa = aminoisobutyric acid

<400> 25

His Xaa Gln Gly Thr Phe Thr Ser Asp Tyr Ser Lys Tyr Leu Asp Glu

1 5 10 15

Lys Arg Ala Lys Glu Phe Val Gln Trp Leu Met Asn Thr Cys

20 25 30

<210> 26

<211> 30

<212> PRT

<213> oxyntomodulin derivative

<220>

<221> variants

<222> (2)

<223> Xaa = aminoisobutyric acid

<400> 26

His Xaa Gln Gly Thr Phe Thr Ser Asp Tyr Ser Lys Tyr Leu Asp Glu

1 5 10 15

Lys Arg Ala Lys Glu Phe Val Gln Trp Leu Met Asn Thr Cys

20 25 30

<210> 27

<211> 29

<212> PRT

<213> acid-regulated peptide derivative secreted'

<220>

<221> variants

<222> (2)

<223> Xaa = aminoisobutyric acid

<400> 27

His Xaa Gln Gly Thr Phe Thr Ser Asp Tyr Ser Lys Tyr Leu Asp Glu

1 5 10 15

Gln Ala Ala Lys Glu Phe Ile Cys Trp Leu Met Asn Thr

20 25

<210> 28

<211> 29

<212> PRT

<213> oxyntomodulin derivative

<220>

<221> variants

<222> (2)

<223> Xaa = aminoisobutyric acid

<400> 28

His Xaa Gln Gly Thr Phe Thr Ser Asp Tyr Ser Lys Tyr Leu Asp Glu

1 5 10 15

Lys Arg Ala Lys Glu Phe Val Gln Trp Leu Met Asn Thr

20 25

<210> 29

<211> 37

<212> PRT

<213> oxyntomodulin derivative

<220>

<221> variants

<222> (2)

<223> the "S" refers to a serine, d-serine variant.

<400> 29

His Ser Gln Gly Thr Phe Thr Ser Asp Tyr Ser Lys Tyr Leu Asp Ser

1 5 10 15

Arg Arg Ala Gln Asp Phe Val Gln Trp Leu Met Asn Thr Lys Arg Asn

20 25 30

Arg Asn Asn Ile Ala

35

<210> 30

<211> 37

<212> PRT

<213> oxyntomodulin derivative

<220>

<221> variants

<222> (1)

<223> the "H" means a derivative of histidine, 4-imidazolylacetyl

<400> 30

His Ser Gln Gly Thr Phe Thr Ser Asp Tyr Ser Lys Tyr Leu Asp Ser

1 5 10 15

Arg Arg Ala Gln Asp Phe Val Gln Trp Leu Met Asn Thr Lys Arg Asn

20 25 30

Arg Asn Asn Ile Ala

35

<210> 31

<211> 37

<212> PRT

<213> oxyntomodulin derivative

<220>

<221> variants

<222> (1)

<223> the "H" means a derivative of histidine, 4-imidazolylacetyl

<220>

<221> variants

<222> (2)

<223> the "S" refers to a serine, d-serine variant.

<400> 31

His Ser Gln Gly Thr Phe Thr Ser Asp Tyr Ser Lys Tyr Leu Asp Ser

1 5 10 15

Arg Arg Ala Gln Asp Phe Val Gln Trp Leu Met Asn Thr Lys Arg Asn

20 25 30

Arg Asn Asn Ile Ala

35

<210> 32

<211> 30

<212> PRT

<213> Artificial sequence

<220>

<223> oxyntomodulin derivative

<220>

<221> variants

<222> (1)

<223> the "H" means a derivative of histidine, 4-imidazolylacetyl.

<220>

<221> variants

<222> (2)

<223> Xaa = aminoisobutyric acid

<400> 32

His Xaa Gln Gly Thr Phe Thr Ser Asp Tyr Ser Lys Tyr Leu Asp Glu

1 5 10 15

Lys Arg Ala Lys Glu Phe Val Gln Trp Leu Met Asn Thr Cys

20 25 30

<210> 33

<211> 30

<212> PRT

<213> Artificial sequence

<220>

<223> oxyntomodulin derivative

<220>

<221> variants

<222> (2)

<223> Xaa = aminoisobutyric acid

<400> 33

His Xaa Gln Gly Thr Phe Thr Ser Asp Tyr Ala Lys Tyr Leu Asp Glu

1 5 10 15

Lys Arg Ala Lys Glu Phe Val Gln Trp Leu Met Asn Thr Cys

20 25 30

<210> 34

<211> 30

<212> PRT

<213> Artificial sequence

<220>

<223> oxyntomodulin derivative

<220>

<221> variants

<222> (2)

<223> Xaa = aminoisobutyric acid

<400> 34

Tyr Xaa Gln Gly Thr Phe Thr Ser Asp Tyr Ser Lys Tyr Leu Asp Glu

1 5 10 15

Lys Arg Ala Lys Glu Phe Val Gln Trp Leu Met Asn Thr Cys

20 25 30

<210> 35

<211> 8

<212> PRT

<213> Artificial sequence

<220>

<223> group R2

<400> 35

Lys Arg Asn Arg Asn Asn Ile Ala

1 5

<210> 36

<211> 10

<212> PRT

<213> Artificial sequence

<220>

<223> group R2

<400> 36

Gly Pro Ser Ser Gly Ala Pro Pro Pro Ser

1 5 10

<210> 37

<211> 11

<212> PRT

<213> Artificial sequence

<220>

<223> group R2

<400> 37

Gly Pro Ser Ser Gly Ala Pro Pro Pro Ser Lys

1 5 10

<210> 38

<211> 15

<212> PRT

<213> Artificial sequence

<220>

<223> group R2

<400> 38

His Ser Gln Gly Thr Phe Thr Ser Asp Tyr Ser Lys Tyr Leu Asp

1 5 10 15

<210> 39

<211> 16

<212> PRT

<213> Artificial sequence

<220>

<223> group R2

<400> 39

His Ser Gln Gly Thr Phe Thr Ser Asp Tyr Ser Arg Tyr Leu Asp Lys

1 5 10 15

<210> 40

<211> 20

<212> PRT

<213> Artificial sequence

<220>

<223> group R2

<400> 40

His Gly Glu Gly Thr Phe Thr Ser Asp Leu Ser Lys Gln Met Glu Glu

1 5 10 15

Glu Ala Val Lys

20

<210> 41

<211> 28

<212> PRT

<213> Artificial sequence

<220>

<223> group A or B

<400> 41

Ser Gln Gly Thr Phe Thr Ser Asp Tyr Ser Lys Tyr Leu Asp Ser Arg

1 5 10 15

Arg Ala Gln Asp Phe Val Gln Trp Leu Met Asn Thr

20 25

<210> 42

<211> 28

<212> PRT

<213> Artificial sequence

<220>

<223> group A or B

<400> 42

Ser Gln Gly Thr Phe Thr Ser Asp Tyr Ser Lys Tyr Leu Asp Glu Glu

1 5 10 15

Ala Val Arg Leu Phe Ile Glu Trp Leu Met Asn Thr

20 25

<210> 43

<211> 28

<212> PRT

<213> Artificial sequence

<220>

<223> group A or B

<400> 43

Ser Gln Gly Thr Phe Thr Ser Asp Tyr Ser Lys Tyr Leu Asp Glu Arg

1 5 10 15

Arg Ala Gln Asp Phe Val Ala Trp Leu Lys Asn Thr

20 25

<210> 44

<211> 28

<212> PRT

<213> Artificial sequence

<220>

<223> group A or B

<400> 44

Gly Gln Gly Thr Phe Thr Ser Asp Tyr Ser Arg Tyr Leu Glu Glu Glu

1 5 10 15

Ala Val Arg Leu Phe Ile Glu Trp Leu Lys Asn Gly

20 25

<210> 45

<211> 28

<212> PRT

<213> Artificial sequence

<220>

<223> group A or B

<400> 45

Gly Gln Gly Thr Phe Thr Ser Asp Tyr Ser Arg Gln Met Glu Glu Glu

1 5 10 15

Ala Val Arg Leu Phe Ile Glu Trp Leu Lys Asn Gly

20 25

<210> 46

<211> 26

<212> PRT

<213> Artificial sequence

<220>

<223> group A or B

<400> 46

Gly Glu Gly Thr Phe Thr Ser Asp Leu Ser Arg Gln Met Glu Glu Glu

1 5 10 15

Ala Val Arg Leu Phe Ile Glu Trp Ala Ala

20 25

<210> 47

<211> 28

<212> PRT

<213> Artificial sequence

<220>

<223> group A or B

<400> 47

Ser Gln Gly Thr Phe Thr Ser Asp Tyr Ser Arg Gln Met Glu Glu Glu

1 5 10 15

Ala Val Arg Leu Phe Ile Glu Trp Leu Met Asn Gly

20 25

<210> 48

<211> 24

<212> PRT

<213> Artificial sequence

<220>

<223> group B

<400> 48

Gly Glu Gly Thr Phe Thr Ser Asp Leu Ser Arg Gln Met Glu Glu Glu

1 5 10 15

Ala Val Arg Leu Phe Ile Glu Trp

20

<210> 49

<211> 14

<212> PRT

<213> Artificial sequence

<220>

<223> group B

<400> 49

Ser Gln Gly Thr Phe Thr Ser Asp Tyr Ser Arg Tyr Leu Asp

1 5 10

<210> 50

<211> 30

<212> DNA

<213> Artificial sequence

<220>

<223> primer

<400> 50

cccggccccc gcggccgcta ttcgaaatac 30

<210> 51

<211> 33

<212> DNA

<213> Artificial sequence

<220>

<223> primer

<400> 51

gaacggtccg gaggacgtcg actcttaaga tag 33

<210> 52

<211> 34

<212> DNA

<213> Artificial sequence

<220>

<223> primer

<400> 52

cagcgacacc gaccgtcccc ccgtacttaa ggcc 34

<210> 53

<211> 32

<212> DNA

<213> Artificial sequence

<220>

<223> primer

<400> 53

ctaaccgact ctcggggaag actgagctcg cc 32

Claims (20)

1. A conjugate comprising an oxyntomodulin derivative, an immunoglobulin Fc region, and a non-peptidyl polymer, wherein the conjugate is obtained by covalently linking the oxyntomodulin derivative to the immunoglobulin Fc region via the non-peptidyl polymer,

wherein the oxyntomodulin peptide derivative is selected from the group consisting of peptides of SEQ ID NO.32, 33 and 34,

wherein the non-peptidyl polymer is selected from the group consisting of polyethylene glycol, polypropylene glycol, a copolymer of ethylene glycol and propylene glycol, a polyoxyethylated polyol, polyvinyl alcohol, a polysaccharide, polyethylene ethyl ether, polylactic acid, polylactic-glycolic acid, a lipopolymer, and a combination thereof.

2. The conjugate of claim 1, wherein the oxyntomodulin peptide derivative is capable of activating the GLP-1 receptor and the glucagon receptor.

3. The conjugate according to claim 1, wherein the conjugate has an anti-obesity effect.

4. The conjugate according to claim 1, wherein the pair of amino acids at positions 16 and 20 of the amino acid sequence of the oxyntomodulin derivative forms a loop.

5. The conjugate according to claim 1, wherein the nonpeptidyl polymer is polyethylene glycol.

6. The conjugate according to claim 1, wherein the amino group and the thiol group of the immunoglobulin Fc region and the oxyntomodulin are linked to both ends of the non-peptidyl polymer, respectively.

7. The conjugate according to claim 1, wherein the nonpeptidyl polymer has reactive groups at both ends capable of binding to the immunoglobulin Fc region and the oxyntomodulin derivative.

8. The conjugate of claim 7, wherein the reactive group is selected from the group consisting of aldehyde, malonaldehyde, butyraldehyde, maleimide group, and succinimide derivative.

9. The conjugate according to claim 7, wherein the reactive groups at both ends are the same as or different from each other.

10. The conjugate of claim 1, wherein the immunoglobulin Fc region is an aglycosylated Fc region.

11. The conjugate of claim 1, wherein the immunoglobulin Fc region is selected from the group consisting of a CH1 domain, a CH2 domain, a CH3 domain, and a CH4 domain; a CH1 domain and a CH2 domain; a CH1 domain and a CH3 domain; a CH2 domain and a CH3 domain; a combination of one or more domains and an immunoglobulin hinge region or partial hinge region; and dimers of each domain of the heavy and light chain constant regions.

12. The conjugate of claim 1, wherein the immunoglobulin Fc region is a derivative in which regions capable of forming disulfide bonds are deleted, certain amino acid residues are removed at the N-terminus of the native Fc form, methionine residues are added to the N-terminus of the native Fc form, the complementary-binding site is deleted, or the antibody-dependent cell-mediated cytotoxicity site is deleted.

13. The conjugate of claim 1, wherein the immunoglobulin Fc region is an Fc region derived from an immunoglobulin selected from the group consisting of IgG, IgA, IgD, IgE, and IgM.

14. The conjugate of claim 13, wherein the immunoglobulin Fc region is an IgG4 Fc region.

15. The conjugate of claim 1, wherein the immunoglobulin Fc region is a human IgG 4-derived aglycosylated Fc region.

16. A pharmaceutical composition for the prevention or treatment of obesity, comprising a conjugate,

the conjugate includes an oxyntomodulin derivative, an immunoglobulin Fc region, and a non-peptidyl polymer, wherein the conjugate is obtained by covalently linking the oxyntomodulin derivative to the immunoglobulin Fc region by the non-peptidyl polymer,

wherein the oxyntomodulin peptide derivative is selected from the group consisting of peptides of SEQ ID NO.32, 33 and 34,

wherein the non-peptidyl polymer is selected from the group consisting of polyethylene glycol, polypropylene glycol, a copolymer of ethylene glycol and propylene glycol, a polyoxyethylated polyol, polyvinyl alcohol, a polysaccharide, polyethylene ethyl ether, polylactic acid, polylactic-glycolic acid, a lipopolymer, and a combination thereof.

17. The pharmaceutical composition of claim 16, further comprising a pharmaceutically acceptable carrier.

18. The pharmaceutical composition according to claim 16, wherein the composition is administered alone or in combination with other pharmaceutical agents exhibiting obesity preventive or therapeutic effects.

19. The pharmaceutical composition of claim 18, wherein the pharmaceutical formulation is selected from the group consisting of GLP-1 receptor agonists, leptin receptor agonists, DPP-IV inhibitors, Y5 receptor antagonists, melanin-concentrating hormone receptor antagonists, Y2/3 receptor agonists, MC3/4 receptor agonists, gastric/pancreatic lipase inhibitors, 5HT2c agonists, β 3A receptor agonists, dextrin receptor agonists, ghrelin antagonists, and ghrelin receptor antagonists.

20. Use of a conjugate according to claim 1 or a composition according to any one of claims 17 to 19 in the manufacture of a medicament for the prevention or treatment of obesity.