WO2006121156A1 - 皮膚再生を促進する医療用組成物 - Google Patents
皮膚再生を促進する医療用組成物 Download PDFInfo
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- WO2006121156A1 WO2006121156A1 PCT/JP2006/309562 JP2006309562W WO2006121156A1 WO 2006121156 A1 WO2006121156 A1 WO 2006121156A1 JP 2006309562 W JP2006309562 W JP 2006309562W WO 2006121156 A1 WO2006121156 A1 WO 2006121156A1
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- chitosan
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- skin
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- saccharide
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Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K9/00—Medicinal preparations characterised by special physical form
- A61K9/06—Ointments; Bases therefor; Other semi-solid forms, e.g. creams, sticks, gels
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
- A61L27/50—Materials characterised by their function or physical properties, e.g. injectable or lubricating compositions, shape-memory materials, surface modified materials
- A61L27/60—Materials for use in artificial skin
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K31/00—Medicinal preparations containing organic active ingredients
- A61K31/185—Acids; Anhydrides, halides or salts thereof, e.g. sulfur acids, imidic, hydrazonic or hydroximic acids
- A61K31/19—Carboxylic acids, e.g. valproic acid
- A61K31/195—Carboxylic acids, e.g. valproic acid having an amino group
- A61K31/197—Carboxylic acids, e.g. valproic acid having an amino group the amino and the carboxyl groups being attached to the same acyclic carbon chain, e.g. gamma-aminobutyric acid [GABA], beta-alanine, epsilon-aminocaproic acid or pantothenic acid
- A61K31/198—Alpha-amino acids, e.g. alanine or edetic acid [EDTA]
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K31/00—Medicinal preparations containing organic active ingredients
- A61K31/33—Heterocyclic compounds
- A61K31/395—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins
- A61K31/40—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having five-membered rings with one nitrogen as the only ring hetero atom, e.g. sulpiride, succinimide, tolmetin, buflomedil
- A61K31/403—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having five-membered rings with one nitrogen as the only ring hetero atom, e.g. sulpiride, succinimide, tolmetin, buflomedil condensed with carbocyclic rings, e.g. carbazole
- A61K31/404—Indoles, e.g. pindolol
- A61K31/405—Indole-alkanecarboxylic acids; Derivatives thereof, e.g. tryptophan, indomethacin
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K31/00—Medicinal preparations containing organic active ingredients
- A61K31/33—Heterocyclic compounds
- A61K31/395—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins
- A61K31/41—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having five-membered rings with two or more ring hetero atoms, at least one of which being nitrogen, e.g. tetrazole
- A61K31/4164—1,3-Diazoles
- A61K31/4172—Imidazole-alkanecarboxylic acids, e.g. histidine
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K31/00—Medicinal preparations containing organic active ingredients
- A61K31/70—Carbohydrates; Sugars; Derivatives thereof
- A61K31/7004—Monosaccharides having only carbon, hydrogen and oxygen atoms
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
- A61L27/14—Macromolecular materials
- A61L27/20—Polysaccharides
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P17/00—Drugs for dermatological disorders
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P17/00—Drugs for dermatological disorders
- A61P17/02—Drugs for dermatological disorders for treating wounds, ulcers, burns, scars, keloids, or the like
Definitions
- the present invention relates to a medical composition that can promote skin regeneration, comprising a photocrosslinkable chitosan derivative and a sugar such as glucose and / or an amino acid such as glycine.
- the skin originally has a self-repair function, and if it is a mild wound such as a simple trauma, the skin is regenerated by the self-repair function, but it is difficult to treat severe burns, radiation-exposed complex wounds, wounds, etc. Complete repair is difficult for sexual wounds (Non-patent Document 1).
- the mechanism of wound healing proceeds in the following order: (1) Inflammatory cells, then connective tissue cells, epidermal cells recognize wounds, (2) wound contractions, and (3) granulation and epithelialization
- Inflammatory cells then connective tissue cells, epidermal cells recognize wounds, (2) wound contractions, and (3) granulation and epithelialization
- the cells involved in each stage, various factors, site force-in, secretions, etc. have been elucidated.
- Skin substitutes have been used to treat patients with full-thickness skin defects.
- Skin substitutes incorporating epidermal cells are called cultured epidermis
- skin substitutes incorporating dermal fibroblasts are called cultured dermis
- those incorporating both are called cultured skin.
- frozen cultured epidermis is used for the treatment of deep-grade II burns, and the autologous cultured epidermis is replaced by autologous cells.
- the ability to promote granulation may be epithelial even in full-thickness skin thigh ulcers or severe burns. Have to rely on autologous skin transplants Yes.
- Apligraf (NOVARTI S), VivoDerm (Convatec) and the like are commercially available as cultured skin in which epidermal cells and fibroblasts are incorporated.
- problems such as the affinity between the cultured epithelial layer and the dermis layer and the inability to obtain clinical effects in infected wounds, and it is far from the completion of a skin substitute that can replace autologous skin. There is a thing.
- Non-Patent Document 1 Kenji Takayanagi and Norio Kumagai, “Protein Nucleic Acid Enzyme” No. 45, No. 13, pp. 2832-2287, 2000
- the problem in the present invention is that the autologous skin graft can be simply immobilized in autologous skin transplantation, which is the only epithelial regeneration method for wide-ranging full-thickness skin defects such as severe burns, and the efficiency of epithelialization is improved. It is to provide a medical composition that can promote skin regeneration by raising the skin. In particular, in the treatment of severe burns, it is known that promoting the formation of granulation at an early stage is greatly involved in the establishment of autologous skin grafts, and the development of simple polymer skin preparations that promote granulation has not been developed. , Means to solve the problems that have been expected of many burn specialists
- the present invention provides a medical composition
- a medical composition comprising a base material and a saccharide and Z or an amino acid.
- a so-called coating material that is used for wounds and supports wound repair and tissue healing / regeneration is preferably used.
- various nodule gels, nodoid colloids, collagen, gelatin preparations and the like can be mentioned.
- the photo-crosslinkable chitosan derivative (PRC) used in the present invention is selected from, for example, those described in the WO00 / 27889 pamphlet, and is adhesive with safe ultraviolet light around 400 nm. It is a functional polymer that can be used as an adhesive gel and is suitably used as a medical adhesive. Therefore, the composition of the present invention containing the PRC prevents infection of the affected area while fixing and sealing the transplanted tissue such as autograft by a simple operation, and preserves the active granulation ability of the living body. In addition to the basic characteristics of the PRC, it has characteristics particularly suitable for the use of the present invention including burn healing that there is no fear of re-failure during replacement due to early degradation.
- the wound healing activity can be enhanced by including a wound healing promoter such as a cell growth factor in the PRC (see WO03 / 090765 pamphlet), the composition of the present invention does not contain a growth factor or the like.
- a wound healing promoter such as a cell growth factor in the PRC (see WO03 / 090765 pamphlet)
- the composition of the present invention does not contain a growth factor or the like.
- autologous skin grafts can engraft other skin substitutes at the wound site, and can be used as a material to support skin grafts for skin wounds such as severe burns. Skin grafts have the effect of promoting epidermis and healing even without a skin substitute, and can be used as a skin wound treatment.
- composition of the present invention is not a human tissue-derived preparation such as fibrin glue or collagen preparation, which is a conventional adhesive, and therefore has the advantage that there is no risk of infection.
- FIG. 1 is an explanatory diagram showing an outline of a method of an autologous skin transplantation experiment in an example.
- FIG. 2 is a photomicrograph showing the tissue change of a wound site when the composition (A) of the present invention is used in Example 2.
- FIG. 3 is a photomicrograph showing the tissue change at the wound site when the composition (B) containing no amino acid and saccharide was used in Example 2.
- FIG. 4 is a photomicrograph showing a cross-section of a wound site tissue stained with anti-VEGF when the composition (A) of the present invention is used in Example 3.
- FIG. 5 is a photomicrograph showing a cross-section of a wound site tissue stained with anti-VEGF when the composition (A) of the present invention is used in Example 3.
- FIG. 6 is a photograph showing a method for forming and treating artificial burns in Example 6.
- FIG. 7 is a graph showing the change in thickness of the granulation tissue at the burn site in Example 6.
- FIG. 8 is a graph showing changes in the number of capillaries at the burn site in Example 6.
- the photocrosslinkable chitosan derivative (PRC) used in the medical composition of the present invention introduces a photoreactive substituent and a sugar chain structure into a polymer skeleton generally called chitin 'chitosans.
- a polymer skeleton generally called chitin 'chitosans.
- at least a part of the 2-position amino group of the darcosamine unit constituting the chitin 'chitosan deacetylated at least partially has a reducing end.
- a saccharide to be introduced is introduced and a photoreactive functional group is introduced into at least a part of the other.
- chitin 'chitosans are deacetylated acids obtained by alkali treatment of crustaceans derived from crustaceans such as shrimp shells and force-shells (poly-N-acetylethyldarcosamine). It is a soluble fraction and generally has a constitutional unit represented by the following formulas (1) and (2). In addition, there is no problem even if the raw material is derived from squid cartilage, insects or plants.
- chitin ⁇ chitosans those having a low degree of deacetylation (usually less than 40%) are “chitin”, and those having a high degree of deacetylation (usually 40% or more) are “ In the present specification, chitins that have been at least partially deacetylated will be collectively referred to as “chitosan”.
- the chitosan in the present invention is not limited to a naturally derived one, but may be a chemically modified sugar chain having a similar structure synthesized chemically, enzymatically, or fermentation engineering.
- degree of deacetylation means that the acetylylamino group at the 2-position of the sugar unit constituting chitosan (or poly-N-acetylyldarcosamine) is converted to a free amino group by deacetylation. It is a ratio.
- degree of deacetylation is quantified by the “colloid titration method” described in “Health Food Standard Criteria (Part 4)”, Japan Health and Nutrition Food Association (1996), p. 55. .
- the chitosan derivative of the present invention is functionalized by further chemically modifying this chitosan.
- the degree of deacetylation is at least 40%, particularly 60%. Those in the range of -100%, more particularly 65-95% are preferred.
- chitosan having a deacetylation degree of 100% can be used only for the structural unit of the above formula (1), and does not include the structural unit of the formula ( 2 ).
- the molecular weight of the chitosan is not particularly limited and can be varied in a wide range depending on the intended use of the final chitosan derivative. Generally, the number average molecular weight is 5,000 to 2,000,000, preferably ⁇ is 10,000 to The power is also 1,800,000, more preferred ⁇ is in the range of 40,000 to 1,500,000 0!
- a chitosan derivative preferable in the present invention introduces a saccharide having a reducing end in at least a part of the amino group at the 2-position of the darcosamine unit of the formula (1) constituting the chitosan, and the other part is a light A reactive functional group is introduced.
- chitosan derivatives refer to WO00Z27889 pamphlet.
- Examples of the saccharide having a reducing end introduced into the chitosan derivative include aldoses and ketoses. Among them, those having 20 or less, particularly 1 to 7 saccharide units are preferred. Used properly. Specifically, for example, pentaose and hexaose such as glucose, fructose, galactose, fucose, mannose, arabinose, xylose, erythrose, heprose, hexylose; darcosamine, N-acetylethyldarcosamine, galaxamine, etc.
- aldoses and ketoses those having 20 or less, particularly 1 to 7 saccharide units are preferred.
- pentaose and hexaose such as glucose, fructose, galactose, fucose, mannose, arabinose, xylose, erythrose, heprose, hexylose
- darcosamine N-acetylethyldarco
- Amino sugars include sugar derivatives such as uronic acids and deoxy sugars; di- or tri-saccharides such as maltose, isomaltose, ratatoose, melibiose, maltotriose; Among them, neutral disaccharides such as maltose, latatose and melibiose are preferable. In particular, Darcos is preferable.
- Organic compounds such as polyethers and polyhydric alcohols can be derived into chitosan instead of the above saccharides, but it is preferable to use natural sugar chains in terms of biocompatibility and the like.
- the introduction of the above saccharide into the 2-position amino group of the darcosamine unit of the formula (1) of chitosan can be carried out using a method known per se.
- the reducing end of the saccharide is substituted with carboxyl.
- the amide bond is attached to the 2-position amino group (see, for example, JP-A-10-120705), or the reducing end of the saccharide is aldehyded or carbonylated, and then the 2-position of the darcosamine unit.
- a method of binding to an amino group by a reduced alkyl group method via a Schiff base for example, Chitin's Chitosan Study Group, “Application of Chitin's Chitosan”, p. 53-56, February 20, 1990, Technical Hall Publishing Co., Ltd.) ) Issuance reference).
- the sugars introduced into chitosan in the present invention are not limited to only one kind, and two or more kinds can be used in combination.
- sugar side chain constituting the chitosan derivative of the present invention include, but are not limited to, the following.
- the degree of substitution of the 2-position amino group of the darcosamine unit of chitosan with the sugar side chain can be varied depending on the physical properties desired for the final chitosan derivative, but the degree of substitution is generally 0.1-80. It is preferred that it is in the range of%, especially 0.5-60%, more particularly 1-40%.
- the “degree of substitution” of the sugar side chain is such that the amino group at the 2-position of the sugar unit constituting the chitosan is substituted with the sugar side chain, and the free amino at the 2-position of the sugar unit constituting the chitosan.
- the ratio is the ratio of the substituted amino group to the total of the group and the substituted amino group.
- the degree of substitution of sugar side chains is measured by the “phenol-sulfuric acid method” which detects the characteristic color development based on the reaction of sugar chains with phenol in sulfuric acid at an absorbance of 490 nm (JEHodge, BTHof reiter, Methods in arbohydrate Chemistry, ed.
- the chitosan derivative of the present invention is self-crosslinkable by light irradiation by introducing a photoreactive functional group into at least a part of the 2-position amino group of the darcosamine unit of the formula (1) constituting the chitosan. Is granted.
- the photoreactive functional groups used for the chemical modification of chitosan according to the present invention may be produced by irradiation with ultraviolet light, particularly ultraviolet light containing a near ultraviolet region of about 200 to 380 nm, and / or in the chitosan. It includes groups that react with existing amino groups or hydroxyl groups to form crosslinks, such as cyclic unsaturated compounds such as benzophenones, kainates, azides, diolefins, and bisanthracene. In particular, those having a carbonyl azide group, a sulfonyl azide group or an aromatic azide group are preferred.
- the photoreactive functional group may be a substituent that reacts with irradiation of visible light of about 400 to 500 nm.
- a functional group include a formylstilil compound described in Journal of Polymer Science: Polymer Chemistry Edition, Vol. 20, 1419-1432 (1982) as represented by the following formula: Can be mentioned.
- Ar represents a heterocyclic ring such as pyridine, alkyl pyridinium salt, quinoline, alkyl quinolium salt, etc.
- the powerful photoreactive functional group can be introduced into the amino group at the 2-position of the darcosamine unit of chitosan by a method known per se.
- an azide compound having a carboxyl group can be introduced in the presence of a condensing agent.
- the photoreactive functional group constituting the chitosan derivative (PRC) of the present invention are represented by the following formulas (A) to (D) in the case of ultraviolet rays, for example.
- the group of formula (A) is one that also induces P-azidobenzoic acid
- the group of formula (B) is one that induces P-azidebenzaldehyde
- the group of formula (C) is p-Benzylbenzoic acid power is induced
- the group of formula (D) is key skin acid power induced
- formula (E) is 1-methyl-4- [2- ( Formylfuel) etul] pyridium force is to be induced.
- the degree of introduction of these photoreactive functional groups can be changed depending on the degree of gelation (insolubilization) based on the crosslinking reaction desired for the final chitosan derivative.
- the degree of substitution is preferably in the range of 0.1% to 80%, particularly 0.5 to 50%, more particularly 1 to 30%.
- the “substitution degree” of the photoreactive functional group is such that the amino group at the 2-position of the sugar unit constituting the chitosan is substituted with the photoreactive sensitive group, and the sugar unit constituting the chitosan is This is the ratio of the substituted amino group to the total of the 2-position free amino group and the substituted amino group.
- the degree of substitution of a photoreactive functional group for example, an azide group
- a calibration curve that also provides the characteristic absorptivity of 270 nm of 4-azidobenzoic acid. it can.
- the total substitution degree of the sugar side chain and the photoreactive functional group in the chitosan derivative of the present invention is a force that can be changed over a wide range that is not particularly limited, and is generally 0.2 to 80%, preferably 1 5 to 65%, more preferably 3 to 50%
- An amphiphilic group may be introduced into at least a part of the hydroxyl group, whereby a drastically improved water content can be added to the crosslinked matrix.
- This amphiphilic group is a group having a hydrophobic block having a hydrophobic group and a hydrophilic block having a hydrophilic group, and generally has a surfactant function in many cases.
- the group of can be used more suitably.
- Particularly preferred are polyoxyalkylene alkyl ethers having a molecular weight of at least 90, more preferably 500 to 10,000, which also comprise a hydrophobic alkyl block and a hydrophilic polyoxyalkylene blocking force! /. Does not have a hydrophobic block! ⁇ Ability to use polyethers S, Polyoxyalkylene alkyl ethers having both a hydrophobic block and a hydrophilic block are preferred for improving water content.
- a powerful amphiphilic group into chitosan is, for example, a group capable of reacting with an amino group to form a covalent bond at either end of the hydrophilic block or hydrophobic block of the amphiphilic group, For example, after introducing a compound having an aldehyde group or an epoxy group, it reacts with the 2-position amino group of darcosamine of chitosan, or reacts a polyoxyalkylene alkyl ether derivative having a carboxyl group with chitosan in the presence of a condensing agent. And a method in which a polyoxyalkylene alkyl ether derivative having an acid chloride group is reacted with a hydroxyl group amino group of chitosan.
- a polyoxyalkylene alkyl ether group derived from an epoxy group at the end or a polyoxyalkylene alkyl ether group derived from an aldehyde group at the end is introduced into the amino group of chitosan, it is bonded to the chitosan skeleton.
- the side chain is represented by the following formula (a) or (b).
- polyoxyalkylene alkyl derivatives having acid chloride groups at the ends are also provided.
- the side chain bonded to the chitosan skeleton is represented by the following formula (c).
- n and m in the following formulas (a) to (c) are the number of repeating units of 1 or more.
- the degree of introduction of the amphiphilic group in the chitosan derivative of the present invention is particularly limited. However, based on the change in the weight of the chitosan derivative after introduction, it can usually be in the range of 5 to 70%, preferably 15 to 55%.
- a saccharide having a reducing end in the chitosan skeleton and a photoreactive functional group are introduced.
- an amphiphilic group may be introduced.
- an insoluble gel body is immediately formed by light irradiation after application to an arbitrary site, so that a graft such as a skin substitute can be fixed to the tissue. It can promote epithelialization and regenerate the skin.
- any polymer such as a polysaccharide such as hyaluronic acid, a protein such as collagen, or other synthetic polymer may be used in place of chitosan as the polymer constituting the skeleton of the photocrosslinkable chitosan derivative of the present invention.
- Good are sugars that can seal wounds and tissues, have drug retention and moderate biodegradability, and are capable of controlled release of drugs at a rate that is too fast.
- chitosan which has antibacterial properties while maintaining high wound healing activity in the living body, or saccharides such as hyaluronic acid, particularly in terms of points such as supply and cost of raw materials, is preferred.
- a functional group having chemical crosslinkability may be introduced instead of the photoreactive functional group. It is preferable that rapid intramolecular crosslinking is possible and the switching thereof is easy. Since the switching is easy, the reactivity is high, and there are few unreacted active sites. It can be suitably used.
- chitosan having an amino group at the 2-position is advantageous for the reaction of introducing a photoreactive functional group, and can be suitably used from this point.
- composition of the present invention is characterized by containing a saccharide and / or an amino acid in addition to the photocrosslinkable chitosan derivative (PRC)! /
- the amino acid used in the present invention is not particularly limited as long as it is a commonly known amino acid such as glutamine, lanine, serine, and the like, but particularly essential amino acids (ferruleanine, leucine, norin, histidine). Methionine, isoleucine, lysine, threonine, tryptophan, arginine, glycine).
- the medical composition of the present invention comprises a photocrosslinkable chitosan derivative (PRC), an amino acid, Z or saccharide, and other optional components in a solvent, preferably an aqueous medium, preferably neutral pH. It can be prepared by dissolving with. For example, amino acids or saccharides may be added to PRC in distilled water or phosphate buffer solution (PBS), or the PRC solution may be prepared by mixing with a cell culture medium containing amino acids and / or saccharides.
- a cell culture medium particularly preferably used in the present invention is a mixed medium (DMEM / F12) of Dulbecco's modified Eagle's medium (D-MEM) and Norm's F12 medium (DMEM / F12).
- the desired degradation characteristics can be obtained even if the culture medium is a human cell line culture medium that is commercially available from Nissui Pharmaceutical and used in Riken Cell Bank. For other media, see for example http://fonc-p.co.jp/hitoseihin.html and http: //www.brc.rike n.jp/lab/cell/distribution/med—table.shtml. ! ,.
- the content of the photocrosslinkable chitosan derivative (PRC) in the medical composition of the present invention ensures injectability into the periphery of the skin graft, and ensures that the skin graft is supported by the crosslinked gel.
- PRC photocrosslinkable chitosan derivative
- L00 mgZml more preferably at least 150 mg / mU, more preferably 530 mgZml, in particular around 20 mgZml.
- the content of amino acids and / or saccharides is not particularly limited, but the amino acid is about 0.01 50 mgZml, more preferably about 0.125 mg / ml, and even more preferably about 0.2 200 mg / ml.
- the desired degradability can be obtained with about 0.1 250 mg / ml, more preferably about 1.0 200 mg Zml, and even more preferably about 1.5 150 mg Zml as the saccharide.
- the effect of adding these amino acids and saccharides can be obtained in the same way by adding them alone or by mixing them as long as they do not dissolve in the PRC solution before light irradiation.
- the medical composition of the present invention prepared as described above contains a photocrosslinkable chitosan derivative (PRC), so that light of a predetermined intensity (such as ultraviolet light and visible light) is emitted.
- PRC photocrosslinkable chitosan derivative
- the photocrosslinking conditions vary depending on the type and degree of substitution of photoreactive functional groups introduced into the photocrosslinkable chitosan derivative used, the amount of chitosan derivative contained in the composition, and the amount of composition used. However, if a predetermined integrated amount of light by ultraviolet rays having a wavelength of 400 or less is obtained, the cross-linking reaction is quickly achieved and a practical chitosan hydrate gel body can be obtained. For example, when measuring light intensity with a commercially available illuminometer of 365 nm detection type (UIT-150, Usio Electric), the composition achieves good cross-linked hydration gel formation with an integrated light intensity of 50-300 mj / cm 2 .
- the composition undergoes a cross-linking reaction with ultraviolet light from a UV-LED, excimer laser, mercury lamp, etc. with a wavelength of 400 nm or less, and the irradiation time can be shortened to obtain the required integrated light intensity by increasing the irradiation intensity. It is also possible to obtain a desired hide-mouthed gel body with an irradiation time of seconds or less.
- the crosslinking reactivity of the photoreactive group of the chitosan matrix is not particularly limited, but the crosslinked chitosan matrix of the present invention is at least 30%, preferably 40 100%, more preferably 50 to: LO 0%, more Preferably 60 to: LOO%, more preferably 70 100% cross-linking reactivity.
- the “degree of crosslinking reaction (or degree of crosslinking)” as used in the present invention refers to the proportion of the photoreactive functional groups present in the photocrosslinkable chitosan derivative bonded to other functional groups.
- glucose and amino acids are added to the chitosan gel layer, so that the intermolecular distance of the chitosan molecule after the photocrosslinking reaction is increased, and cell infiltration is caused. Is considered to be easier.
- Glucose and glutamate are known to stimulate the proliferation of white blood cells!
- the inventors of the present application believe that the main cause of the effect observed in the present invention is the energy effect of the cells by saccharides or amino acids. That is, in the following examples, a photocrosslinkable chitosan gel is used as the base material, but the chitosan gel is replaced with a base material such as another hydose gel, collagen, or gelatin preparation.
- the effects of the present invention can be obtained by using a saccharide such as glucose or an amino acid together, and a medical composition containing such a substrate and the saccharide and / or amino acid is also within the scope of the present invention.
- PRC in which an ultraviolet-reactive functional group and a sugar chain were introduced into the chitosan skeleton was synthesized according to the method described in WO00 / 27889. Specifically, the amino group of chitosan (made by Yaizu Suisan Kogyo Co., Ltd.) with a molecular weight of 800-1000 kDa and a deacetylated degree of 85 derived from shrimp, azide (p-azidobenzoic acid) and ratatoose (ratatobion) Acid) was introduced by a condensation reaction. Due to the introduction of ratatoose, it was soluble at a neutral pH, and the degree of substitution of P-azidobenzoic acid and ratatobionic acid was confirmed to be about 2.5% and 5.0%, respectively.
- Methyl-4- [2- (4-formylphenol) pyridine] -pyridine (FPP) represented by the following formula is converted into Journal of Polymer science: Polymer Chemistry Edition, Vol.20, 14 19- It was synthesized according to the method described in 1432 (1982).
- a 3 cm x 3 cm full-thickness skin defect was artificially created on the back of the rat.
- the cut skin was used as an autologous skin graft, and 12 holes with a diameter of 5 mm were formed in the graft.
- the graft in which a hole is formed in the entire skin defect region is allowed to stand, (A) when left as it is, (B) when the graft is sutured, and (C) a conventional medical adhesive in the hole. (Siano acrylamide type, product name: manufactured by Dermabond CF & J)), and (D) when the composition of the present invention is filled in the hole and irradiated with ultraviolet rays (wavelength 330 nm x 15 seconds), The following items were evaluated. The results are shown in Table 1.
- the untreated graft (A) has a significantly lower survival rate when the graft is sutured (B). It takes more than a minute.
- the Cyanacrylamide adhesive was used (C)
- the force was excellent in terms of treatment time and survival rate.
- the composition of the present invention was used (D)
- all of the treatment time, engraftment rate and granulation formation were excellent.
- a 4% aqueous solution of PRC (distilled water) was prepared and mixed with an equal volume of medium (DMEM / F12, manufactured by Invitrogen) to obtain the composition (A) of this example. Further, a comparative composition (B) was prepared by mixing with an equal amount of PBS instead of the medium.
- the medium (DMEM / F12) used in the composition (A) is a serum-free tissue culture medium containing various amino acids, glucose, and other components.
- the autologous skin graft was allowed to stand at the entire skin defect region of the mouse, filled with the compositions (A) and (B), and irradiated with ultraviolet rays. The results of observation of the cross-sectional tissue at the transplant site are shown in Figs.
- Example (A) using a medium containing amino acids, glucose and the like and Comparative Example (B) using PBS are shown in FIGS. 4 and 5, respectively.
- FIG. 4 (A) using the composition of the present invention strong staining was observed inside the PRC gel layer (FIG. 4 (A)).
- a fibrosis layer containing many neutrophils was present in the upper part of the gel layer, and intense VEGF staining was observed (FIG. 4 (B)).
- Comparative Example (B) dissolved in PBS, the PRC gel layer was not decomposed, and the PRC gel layer was strongly stained in the lowermost layer in contact with the subcutaneous tissue (FIG. 5 (A)). In the interface region, the PRC gel was denatured into a fibrous shape, and VEGF intensity and staining were observed.
- composition in which PRC is dissolved in PBS (A)
- a composition in which 5 mg / ml glutamine is added to (A) ( C) was prepared.
- a composition (D) was prepared by adding glucose and amino acids at the same concentrations as the compositions B and C.
- Example 5 A 2 cm full-thickness skin defect was formed on the back of the mouse and treated with the composition of the present invention or a commercially available artificial dermis collagen membrane (Terdermis; made of Thermonet) (no autologous skin transplantation).
- Tedermis made of Thermonet
- FIG. 6A A severe burn was artificially formed on the back of the rat, and the necrotic tissue was excised (FIG. 6A).
- the site was treated with the composition of the present invention (FIG. 6A) or collagen sponge (Terdermis; made of Thermonet) (FIG. 6C) as a support material. That is, an example in which a composition of the present invention (DMEM / F12-containing PRC aqueous solution) was filled in a wound and photocured was compared with an example in which a collagen sponge was used.
- DMEM / F12-containing PRC aqueous solution DMEM / F12-containing PRC aqueous solution
- the thickness of the epithelium at 32 days after transplantation reached an average of 67.1 ⁇ m in the case treated with the yarn and the composition of the present invention, whereas in the example treated with the collagen sponge, 55.8 ⁇ m. m. That is, from the results of this example, by using the medical composition of the present invention, the increase in neovascularization following granulocyte infiltration into the chitosan gel layer without using autologous skin grafts, Furthermore, the surprising result that epithelialization is induced was obtained.
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Abstract
Description
Claims
Priority Applications (8)
Application Number | Priority Date | Filing Date | Title |
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JP2007528337A JPWO2006121156A1 (ja) | 2005-05-13 | 2006-05-12 | 皮膚再生を促進する医療用組成物 |
KR1020077026351A KR101374448B1 (ko) | 2005-05-13 | 2006-05-12 | 피부 재생을 촉진하는 의료용 조성물 |
US11/913,995 US20100056462A1 (en) | 2005-05-13 | 2006-05-12 | Medical composition for promotion of skin regeneration |
AU2006244873A AU2006244873A1 (en) | 2005-05-13 | 2006-05-12 | Medical composition for promotion of skin regeneration |
EP06732543A EP1880738A1 (en) | 2005-05-13 | 2006-05-12 | Medical composition for promotion of skin regeneration |
CA002607912A CA2607912A1 (en) | 2005-05-13 | 2006-05-12 | Medical composition for promotion of skin regeneration |
CN2006800163958A CN101175512B (zh) | 2005-05-13 | 2006-05-12 | 促进皮肤再生的医疗组合物 |
HK08112046.1A HK1120234A1 (en) | 2005-05-13 | 2008-11-03 | Medical composition for promotion of skin regeneration |
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JP2005140982 | 2005-05-13 | ||
JP2005-140982 | 2005-05-13 |
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US (1) | US20100056462A1 (ja) |
EP (1) | EP1880738A1 (ja) |
JP (1) | JPWO2006121156A1 (ja) |
KR (1) | KR101374448B1 (ja) |
CN (1) | CN101175512B (ja) |
AU (1) | AU2006244873A1 (ja) |
CA (1) | CA2607912A1 (ja) |
HK (1) | HK1120234A1 (ja) |
WO (1) | WO2006121156A1 (ja) |
Cited By (4)
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JPWO2008038503A1 (ja) * | 2006-09-27 | 2010-01-28 | 国立大学法人鳥取大学 | ブレンド型光硬化型キトサン系接着剤または被覆剤 |
JP2011528746A (ja) * | 2008-07-23 | 2011-11-24 | ユニヴァーシタ デグリ ステュディ デイ トリエステ | 多糖マトリックス及び金属ナノ粒子からなる三次元ナノ複合材料、並びにその調製及び使用 |
WO2013111729A1 (ja) * | 2012-01-23 | 2013-08-01 | 株式会社Cac | 医薬組成物及びこれを用いた薬用化粧品 |
WO2024214274A1 (ja) * | 2023-04-14 | 2024-10-17 | Smart Tissues株式会社 | 化学修飾された多糖類を含むポリマー材料 |
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EP3144324A1 (en) | 2006-06-02 | 2017-03-22 | Synedgen, Inc. | Chitosan-derivative compounds and methods of controlling microbial populations |
CN102083476B (zh) | 2008-04-24 | 2016-08-31 | 麦德托尼克公司 | 可再水化的硫醇化多糖颗粒和海绵状物 |
AU2009240512B2 (en) | 2008-04-24 | 2014-07-10 | Medtronic, Inc. | Protective gel based on chitosan and oxidized polysaccharide |
JP5653342B2 (ja) | 2008-04-24 | 2015-01-14 | メドトロニック,インコーポレイテッド | 冷間電離放射線滅菌 |
JP5757861B2 (ja) | 2008-04-24 | 2015-08-05 | メドトロニック,インコーポレイテッド | キトサン−含有保護用組成物 |
KR101112756B1 (ko) * | 2009-06-22 | 2012-03-13 | 중앙대학교 산학협력단 | 광반응성 키토산 유도체 및 그의 용도 |
CN101948573B (zh) * | 2010-09-14 | 2012-06-13 | 杭州师范大学 | 壳聚糖/可德胶共混膜材料及其制备方法 |
JP7004501B2 (ja) * | 2013-12-03 | 2022-01-21 | コーネル ユニバーシティー | 線維輪を修復する方法及びコラーゲンゲル組成物 |
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KR101710615B1 (ko) * | 2016-09-07 | 2017-02-27 | 주식회사 파마리서치프로덕트 | 생착률을 증가시킨 이식용 진피층 및 이의 제조 방법 |
CN107158363A (zh) * | 2017-05-16 | 2017-09-15 | 张莎莎 | 一种用于治疗宫颈糜烂的修复液 |
CN108498855B (zh) * | 2018-05-09 | 2021-04-27 | 福州大学 | 一种抗菌止血溶胶及其制备方法 |
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- 2006-05-12 US US11/913,995 patent/US20100056462A1/en not_active Abandoned
- 2006-05-12 CN CN2006800163958A patent/CN101175512B/zh not_active Expired - Fee Related
- 2006-05-12 JP JP2007528337A patent/JPWO2006121156A1/ja active Pending
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JPWO2008038503A1 (ja) * | 2006-09-27 | 2010-01-28 | 国立大学法人鳥取大学 | ブレンド型光硬化型キトサン系接着剤または被覆剤 |
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Also Published As
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HK1120234A1 (en) | 2009-03-27 |
US20100056462A1 (en) | 2010-03-04 |
CN101175512A (zh) | 2008-05-07 |
CA2607912A1 (en) | 2006-11-16 |
EP1880738A1 (en) | 2008-01-23 |
AU2006244873A1 (en) | 2006-11-16 |
KR20080011286A (ko) | 2008-02-01 |
JPWO2006121156A1 (ja) | 2008-12-18 |
KR101374448B1 (ko) | 2014-03-17 |
CN101175512B (zh) | 2012-10-17 |
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