WO2015033898A1 - 血糖代謝改善用組成物 - Google Patents
血糖代謝改善用組成物 Download PDFInfo
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- WO2015033898A1 WO2015033898A1 PCT/JP2014/072977 JP2014072977W WO2015033898A1 WO 2015033898 A1 WO2015033898 A1 WO 2015033898A1 JP 2014072977 W JP2014072977 W JP 2014072977W WO 2015033898 A1 WO2015033898 A1 WO 2015033898A1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K36/00—Medicinal preparations of undetermined constitution containing material from algae, lichens, fungi or plants, or derivatives thereof, e.g. traditional herbal medicines
- A61K36/18—Magnoliophyta (angiosperms)
- A61K36/185—Magnoliopsida (dicotyledons)
- A61K36/44—Ebenaceae (Ebony family), e.g. persimmon
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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
- A61K9/0012—Galenical forms characterised by the site of application
- A61K9/0053—Mouth and digestive tract, i.e. intraoral and peroral administration
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P3/00—Drugs for disorders of the metabolism
- A61P3/08—Drugs for disorders of the metabolism for glucose homeostasis
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P3/00—Drugs for disorders of the metabolism
- A61P3/08—Drugs for disorders of the metabolism for glucose homeostasis
- A61P3/10—Drugs for disorders of the metabolism for glucose homeostasis for hyperglycaemia, e.g. antidiabetics
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P43/00—Drugs for specific purposes, not provided for in groups A61P1/00-A61P41/00
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K2236/00—Isolation or extraction methods of medicinal preparations of undetermined constitution containing material from algae, lichens, fungi or plants, or derivatives thereof, e.g. traditional herbal medicine
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K2236/00—Isolation or extraction methods of medicinal preparations of undetermined constitution containing material from algae, lichens, fungi or plants, or derivatives thereof, e.g. traditional herbal medicine
- A61K2236/30—Extraction of the material
- A61K2236/33—Extraction of the material involving extraction with hydrophilic solvents, e.g. lower alcohols, esters or ketones
- A61K2236/333—Extraction of the material involving extraction with hydrophilic solvents, e.g. lower alcohols, esters or ketones using mixed solvents, e.g. 70% EtOH
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K2236/00—Isolation or extraction methods of medicinal preparations of undetermined constitution containing material from algae, lichens, fungi or plants, or derivatives thereof, e.g. traditional herbal medicine
- A61K2236/50—Methods involving additional extraction steps
- A61K2236/53—Liquid-solid separation, e.g. centrifugation, sedimentation or crystallization
Definitions
- the present invention relates to a composition for improving blood glucose metabolism. More specifically, the present invention relates to a composition for improving blood glucose metabolism, comprising a koji leaf extract obtained by extracting a koji leaf with a solution in which ethyl alcohol and water are mixed at a specific ratio.
- Patent Documents 1 and 2 propose proposals that focus on this point.
- Non-patent Document 1 Increased diastolic function through e-NOS activation of skeletal muscle capillaries and increase of capillary density due to angiogenesis increase the surface area and blood flow of capillaries, thereby enhancing insulin transfer to cells. It is known that sugar metabolism is improved (Non-patent Document 1).
- the former mechanism via AMP kinase and the latter mechanism via insulin act independently of each other, and both can be expected to express a high sugar uptake effect.
- both of these two mechanisms are normally expressed, but in diabetics and those with insulin resistance, the latter mechanism is reduced or lost.
- a state closer to that of a healthy person can be realized by expressing these mechanisms together or enhancing these functions.
- a method for expressing these two mechanisms together is not yet known, and a proposal for a specific solution is desired.
- An object of the present invention is to provide a composition for improving blood glucose metabolism that improves and / or improves the sugar metabolism function in skeletal muscle.
- the present inventors have found that the koji leaf extract obtained through the step of extracting koji leaf with a solution in which ethyl alcohol and water are mixed at a specific ratio is AMP kinase. It was found that the glucose metabolism function in the skeletal muscle can be greatly improved and / or improved from two mechanisms, the mechanism mediated by insulin and the mechanism mediated by insulin, and the present invention was completed through further research. . *
- Item 1 A composition for improving blood glucose metabolism, comprising a koji leaf extract obtained through a step of extracting koji leaf with a 40-60% ethyl alcohol-water mixture.
- Item 2. The step of extracting persimmon leaves with 40-60% ethyl alcohol-water mixture, and the extract obtained by the above step is adsorbed on a column packed with octadecylsilyl group-bonded silica gel and eluted with 5-10% acetonitrile-water mixture Item 2.
- Item 4. Item 4.
- Term A-1 A method for improving and / or improving blood glucose metabolism comprising a step of administering to a subject a koji leaf extract obtained through a step of extracting koji leaf with a 40-60% ethyl alcohol-water mixture.
- Term A-2 The step of extracting persimmon leaves with 40-60% ethyl alcohol-water mixture, and the extract obtained by the above step is adsorbed on a column packed with octadecylsilyl group-bonded silica gel and eluted with 5-10% acetonitrile-water mixture
- the method according to Item A-1 which comprises the step of administering to the subject the koji leaf extract obtained through the step of: Term A-3.
- the method according to Item A-1 which comprises a step of administering to a subject the koji leaf extract obtained through the step of elution with a% acetone-water mixture.
- Term B-1 Including diabetes, hyperglycemia, impaired glucose tolerance, insulin resistance, arteriosclerosis, including the step of administering to a subject the koji leaf extract obtained by extracting the koji leaf with a 40-60% ethyl alcohol-water mixture. At least one prevention, amelioration and / or treatment method selected from the group consisting of obesity, body fat accumulation, dyslipidemia, lifestyle-related diseases and fatty liver.
- Term B-2 Term B-2.
- the step of extracting persimmon leaves with 40-60% ethyl alcohol-water mixture, and the extract obtained by the above step is adsorbed on a column packed with octadecylsilyl group-bonded silica gel and eluted with 5-10% acetonitrile-water mixture The method according to Item B-1, which comprises the step of administering to the subject the koji leaf extract obtained through the step of: Term B-3.
- the method according to Item B-1 which comprises a step of administering to a subject the koji leaf extract obtained through the step of elution with a% acetone-water mixture.
- AMP kinase can be activated, so that not only the blood glucose level lowering effect due to exercise is enhanced, but also the blood glucose level lowering effect equivalent to that when exercised without exercise is obtained. It is possible. Furthermore, according to the present invention, since the skeletal muscle capillary density can be increased, it is also possible to obtain an effect of improving insulin resistance.
- the composition for improving blood glucose metabolism according to the present invention can improve and / or improve the glucose metabolism function in skeletal muscle from both the mechanism through AMP kinase and the mechanism through insulin. . Therefore, not only for diabetics and pre-diabetes, but also for those who cannot secure sufficient exercise, such as elderly people and bedridden people, to lower blood sugar levels to prevent the onset of diabetes and improve the pathology of diabetes Can do.
- composition for improving blood glucose metabolism of the present invention is also useful as an exercise effect promoter that enhances the effect of exercise by ingesting before, during or after exercise. Moreover, since the composition for improving blood glucose metabolism of the present invention can activate AMP kinase, an anti-aging effect can be expected.
- FIG. 1 is a graph showing the results of Test Example 1-1. Specifically, FIG. 1 shows the measurement results of the expression ratio of phosphorylated AMPK (pAMPK) to total AMPK (tAMPK) using the mouse skeletal myotube cell line of each koji leaf extract obtained in Production Example 1.
- FIG. 2 is a graph showing the results of Test Example 1-2. Specifically, FIG. 2 shows the measurement results of the sugar uptake promoting activity using the mouse skeletal myotube cell lines of the koji leaf extracts A and C obtained in Production Example 1.
- FIG. 3 is a graph showing the results of Test Example 2. Specifically, FIG. 3 shows the measurement results of the glucose uptake promoting activity of each fraction obtained in Production Example 2 using a mouse skeletal myotube cell line.
- FIG. 1 shows the measurement results of the expression ratio of phosphorylated AMPK (pAMPK) to total AMPK (tAMPK) using the mouse skeletal myotube cell line of each koji leaf extract obtained in Production Example 1.
- FIG. 4 is a graph showing the results of Test Example 3. Specifically, FIG. 4 shows the measurement results of the sugar uptake promoting activity using mouse skeletal myotube cell lines of various compounds contained in Extract C and persimmon leaves.
- FIG. 5 is a graph showing the results of Test Example 4. Specifically, FIG. 5 shows the measurement results of the sugar uptake promoting activity of each fraction obtained in Production Example 3 using a mouse skeletal myotube cell line.
- FIG. 6 is a graph showing the results of Reference Test Example 1. Specifically, FIG. 6 shows the measurement results of the glucose uptake promoting activity of each extract obtained in Reference Production Example 1 using a mouse skeletal myotube cell line.
- the composition for improving blood glucose metabolism of the present invention includes a koji leaf extract obtained through a step of extracting koji leaf with a solution in which ethyl alcohol and water are mixed at a specific ratio.
- the leaves for extraction are not particularly limited, and for example, deciduous leaves of the genus Oysteraceae can be used.
- the leaves can be used either before or after falling, but it is preferable to use the leaves before falling.
- the koji leaf used for extraction may be subjected to a pretreatment such as drying according to a conventional method.
- the pretreatment method for the koji leaf include a method in which a koji leaf collected from a tree is washed with water, cut into an appropriate size (for example, about 3 mm width) if necessary, dried by steaming, and dried.
- the method may include a method of washing the bamboo leaves collected from the above and then drying them after cutting into appropriate sizes as necessary.
- the solution used for the extraction of bamboo leaves is a solution in which ethyl alcohol and water are mixed at a specific ratio (hereinafter referred to as “ethyl alcohol-water mixture”), and the ethyl alcohol in the ethyl alcohol-water mixture is mixed.
- the content is about 40 to 60% (wt / wt), preferably about 45 to 55% (wt / wt), and more preferably about 50% (wt / wt).
- an ethyl alcohol-water mixture having an ethyl alcohol content of x% (wt / wt) is referred to as an “x% ethyl alcohol-water mixture”.
- the extraction method of the koji leaf can be performed by a known method as long as it uses the above-mentioned ethyl alcohol-water mixture.
- the koji leaf extract may be obtained through the step of extracting with the above-described ethyl alcohol-water mixture and then the step of concentrating the extract obtained in the step.
- the concentration method is not particularly limited, and a known method can be selected as appropriate.
- the solid content is removed from the obtained extract by a conventional method, and the filtrate is filtered to remove the ethanol content using an evaporator. And a method of performing freeze-drying treatment.
- the koji leaf extract is obtained through the step of extracting with the above-mentioned ethyl alcohol-water mixture and, if necessary, the step of subjecting the extract obtained in the step to further extraction processing. It may be.
- the obtained extract is dissolved in about 9 times the amount of purified water and subjected to ultrasonic treatment. After that, a method of performing a centrifugal separation process of about 10,000 G and recovering the supernatant can be mentioned.
- the extract obtained through the step of concentrating the obtained extract after passing through the step of extracting with an ethyl alcohol-water mixture can be subjected to further extraction treatment.
- the koji leaf extract may be obtained through the step of extracting with the above-mentioned ethyl alcohol-water mixture and then the step of fractionation using a column.
- a column used for fractionation a known column can be used, but a column packed with octadecylsilyl group-bonded silica gel (for example, a Purif-Pack 200 Size ODS column), a column packed with a modified dextran (for example, Sephadex® LH- 20 columns) is preferred.
- a column packed with octadecylsilyl group-bonded silica gel for example, a Purif-Pack 200 Size ODS column
- a column packed with a modified dextran for example, Sephadex® LH- 20 columns
- the eluate used for fractionation can be appropriately selected and used depending on the column to be used.
- a mixed solution of acetonitrile and water hereinafter, It is preferable to use a column filled with modified dextran (hereinafter referred to as “methyl alcohol-water mixture”).
- methyl alcohol-water mixture modified dextran
- acetone-water mixture a solution in which acetone and water are mixed
- an acetonitrile-water mixture having an acetonitrile content of x% is referred to as “x% acetonitrile-water mixture”, and a methyl alcohol-water mixture having a methyl alcohol content of x% is “x% methyl alcohol-water mixture”.
- an acetone-water mixture having an acetone content of x% is referred to as an “x% acetone-water mixture”.
- fractionation conditions are not particularly limited, and may be set as appropriate according to the column and eluate used.
- the extract obtained through the extraction step with the above-mentioned ethyl alcohol-water mixture is used as the octadecylsilyl group.
- Examples include a method of fractionating with a stepwise gradient that adsorbs to a column packed with bound silica gel and elutes while increasing the content of acetonitrile in the acetonitrile-water mixture from about 0% to about 1 to 10%.
- a fraction eluted with a 1-10% acetonitrile-water mixture is preferable because it has a high improvement and / or effect of improving sugar metabolism, and a fraction eluted with a 5-10% acetonitrile-water mixture is preferred. It is more preferable because the improvement and / or improvement effect of the sugar metabolism function is particularly high.
- a fraction eluted with a 5% acetonitrile-water mixture obtained by sequentially eluting with a 0% acetonitrile-water mixture (ie, water), a 5% acetonitrile-water mixture, and a 10% acetonitrile-water mixture.
- a fraction eluted with a 10% acetonitrile-water mixture is more preferable because it has a very high improvement and / or effect of improving the sugar metabolism function.
- a fraction eluted with a 5% acetonitrile-water mixture is more preferable. It is particularly preferable because the function improvement and / or improvement effect is extremely high.
- fractionation when fractionation is performed using a column packed with modified dextran, the extract obtained through the extraction step using the above-described ethyl alcohol-water mixture is adsorbed onto the column packed with modified dextran, and methylated.
- fractionation may be performed with a stepwise gradient that elutes while increasing the content of methyl alcohol in the alcohol-water mixture from about 0% to about 10 to 20%.
- a method of eluting with about 60 to 80% acetone-water mixture after elution with 100% methyl alcohol-water mixture (that is, methyl alcohol) is preferable.
- a fraction eluted with about 40 to 100% methyl alcohol-water mixture and about 60 to 80% acetone-water mixture is preferable because it has a high improvement and / or improvement effect on the sugar metabolism function.
- a fraction eluted with about -100% methyl alcohol-water mixture and about 70% acetone-water mixture is more preferable because it has a particularly high improvement and / or improvement effect on glucose metabolism function.
- 0% methyl alcohol-water mixture ie water
- 20% methyl alcohol-water mixture 40% methyl alcohol-water mixture
- 60% methyl alcohol-water mixture 60% methyl alcohol-water mixture
- 80% methyl alcohol-water mixture 100% methyl Elution with a fraction eluted with a 100% methyl alcohol-water mixture and elution with a 70% acetone-water mixture obtained through the steps of sequential elution with an alcohol-water mixture (ie, methyl alcohol) and 70% acetone-water mixture
- the obtained fraction is more preferable because the improvement and / or improvement effect of the sugar metabolism function is very high.
- composition for improving blood glucose metabolism of the present invention may be the above-described koji leaf extract itself or may contain other components in addition to the koji leaf extract.
- other components include pharmaceutically or food hygienically acceptable carriers.
- compositions for improving blood glucose metabolism of the present invention can be used as an oral composition.
- oral compositions include prevention of diabetes, hyperglycemia, impaired glucose tolerance, insulin resistance, arteriosclerosis, obesity, body fat accumulation, abnormal lipid metabolism, lifestyle-related diseases, fatty liver, etc. ⁇
- Functional foods and drinks based on the concept of improvement, increased glucose metabolism, and physiological functions of anti-aging, foods for the sick, foods for specified health use, nutritional functional foods, dietary supplements, exercise therapy foods, slimming foods, etc. be able to.
- the form of the composition for improving blood glucose metabolism of the present invention is not particularly limited, but when used as an oral composition, for example, forms such as hard capsules, soft capsules, supplements, chewable tablets, beverages, powdered drinks, granules, films, etc. It can be.
- a concentrated type that is diluted with tea-based beverages, sports beverages, beauty beverages, fruit juice beverages, carbonated beverages, alcoholic beverages, soft drinks, jelly beverages, water, hot water, carbonated water, etc.
- Beverages such as beverages, powders and granules that are dissolved or suspended in water or hot water, etc., dry solids such as tablets, tablet confectionery, jelly, snacks, baked confectionery, fried confectionery, cakes, chocolate, It can also be made into food forms such as confectionery such as gum, rice cake, gummy, soup, noodles, cooked rice, cereal and the like.
- the supplement type, chewable tablet, one-shot drink type and the like are preferable, and when taking for the purpose of enhancing the exercise effect, the form of a beverage such as a sports drink is most preferable.
- these oral compositions can be provided to consumers as a packaged food filled in a container.
- the container is not particularly limited as long as it can be sealed.
- the composition for improving blood glucose metabolism is 0 for the total oral composition in terms of dry matter. About 0.01 to 95% by mass, preferably about 5 to 90% by mass, and most preferably about 10 to 80% by mass. In the case of oral compositions other than those described above, the composition for improving blood glucose metabolism is added in an amount of about 0.001 to 50% by mass, preferably about 0.005 to 30% by mass, and most preferably about 0.01 to 10% by mass. That's fine.
- the present invention also provides a method for improving and / or improving blood glucose metabolism, comprising the step of administering the composition for improving blood glucose metabolism of the present invention to a subject.
- the present invention includes a step of administering to the subject the composition for improving blood glucose metabolism of the present invention, diabetes, hyperglycemia, impaired glucose tolerance, insulin resistance, arteriosclerosis, obesity, body fat accumulation, abnormal lipid metabolism, Methods for preventing, improving and / or treating lifestyle diseases, fatty liver, etc. are also provided.
- % means “% by mass” unless otherwise specified.
- Extracts obtained with each solvent were obtained with Extract A (extract obtained with purified water) and Extract B (25% (wt / wt) ethyl alcohol-water mixture), respectively. Extract), Extract C (Extract obtained with 50% (wt / wt) ethyl alcohol-water mixture), Extract D (Extract obtained with 75% (wt / wt) ethyl alcohol-water mixture) ) And extract E (extract obtained with ethyl alcohol).
- Test Example 1 Evaluation of Sugar Metabolism Improvement Effect of Each Leaf Extract (Extracts A to E) The sugar metabolism improvement effect of the leaf extract obtained in Production Example 1 was evaluated. For the evaluation of the glucose metabolism improving action, phosphorylation activity of AMP kinase was measured in a mouse skeletal myotube cell line (C2C12 cell), and the glucose uptake promoting activity was also measured for extracts A and C.
- Test Example 1-1 Measurement of Phosphorylation Activity of AMP Kinase Leaf extract A to E (powder) added to each medium to a final concentration of 0.02% and dissolved were used as samples. (Examples 1-1 to 1-5). Further, a medium to which nothing was added was used as a negative control (Comparative Example 1-1), and AICAR (final concentration 2 mM) was used as a positive control (Comparative Example 1-2). Next, a mouse skeletal myotube cell line (C2C12 cell) was seeded in a 6-well cell culture plate, and was cultured in DMEM medium supplemented with 10% fetal bovine serum and 1% antimicrobial agent at 37 ° C. in the presence of 5% carbon dioxide. Cultured for days.
- the cells were replaced with DMEM medium containing 1% fetal bovine serum, and further cultured to be completely differentiated. Further, after replacing the medium with a new one, the samples of Examples 1-1 to 1-5 and Comparative Examples 1-1 to 1-2 were added, respectively, and cultured at 37 ° C. in the presence of 5% carbon dioxide. . After washing the cells twice with PBS ( ⁇ ), 150 ⁇ L of a cell lysis buffer containing a phosphatase inhibitor, a protease inhibitor, and PMSF was added, and the cell lysate was collected with a cell scraper.
- PBS PBS
- the supernatant was collected by centrifugation. The supernatant was stored at ⁇ 80 ° C. until used for measurement. The protein concentration in the supernatant was measured, and the protein concentration between the samples was adjusted to be constant. After adjusting the protein concentration of the supernatant, a sample buffer (thermo) was added and heat-denatured to be used for the following Western blotting.
- Western blotting was performed by the following method. First, after SDS-PAGE using 7.5% electrophoresis gel, it was transferred to a nitrocellulose membrane by iblot, and phosphorylated AMPK antibody (CST) and total AMPK (CST) were used as primary antibodies with 5% BSA or skim milk. The mixture was diluted 1000 times with TBST containing and allowed to react overnight on a shaker while maintaining the temperature at 4 ° C. Next, after thoroughly washing the nitrocellulose membrane, a secondary antibody (CST, 1: 5000 or Santa Cruz, 1: 10000) labeled with HRP with 5% skim milk TBST was reacted at room temperature for 1 hour.
- CST phosphorylated AMPK antibody
- CST total AMPK
- Example 1-3 Example C
- Example 1-2 Example 1-2
- the phosphorylation activity of AMP kinase in the obtained extract varies depending on the ratio of ethyl alcohol in the ethyl alcohol-water mixture used for the extraction of bamboo leaves.
- Test Example 1-2 Measurement of glucose uptake-promoting activity using skeletal myotube cells Extract C showing the highest phosphate activity of AMP kinase in Test Example 1 above, and low phosphate activity of AMP kinase
- the glucose uptake promoting activity was measured using mouse skeletal myotube cells (C2C12 cells) by the following method.
- Mouse skeletal myoblasts (C2C12 cells) are cultured in high glucose DMEM® (5790), cells are seeded and cultured in a black microtiter plate (Falcon) at a concentration of 5000 ⁇ cells / 200 ⁇ L / well, and myotube cells are cultured. Differentiated cells were used for experiments. As the samples, those obtained by adjusting the final concentrations of the extracts A and C obtained in Production Example 1 to 0.02% and 0.05%, respectively (Examples 2-1 to 2-4), and As a negative control, medium without any addition (Comparative Example 2-1) and insulin sputum (10 nM) (Comparative Example 2-2) were used as positive controls.
- the medium was replaced with low glucose DMEM® (6047), starved, and then replaced with a medium in which the samples of Examples 2-1 to 2-4 and Comparative Examples 2-1 to 2-2 were dissolved. And incubated for 60 minutes. After treatment, the medium is removed and 100 ⁇ M of a photolabeled non-hydrolyzable sugar analog, 6- (N- (7-Nitrobenz-2-oxa-1,3-diazol-4-yl) amino) -6-Deoxyglucose (6 -NBDG (manufactured by Invitrogen) was dissolved in a low glucose DMEM medium and reacted for 30 minutes, and then the medium was removed. After washing with PBS, measurement was performed at 444 nm / 538 nm nm emission using a fluorescent plate reader. The measurement results are shown in Table 2 and FIG.
- Example 2-4 Example C was found to have a very high activity of promoting saccharide uptake of skeletal myotubes.
- the results of Examples 2-2 and 2-4 suggested that the sugar uptake promoting activity has concentration dependency.
- the koji leaf extract obtained by extracting the koji leaf using a solution in which ethyl alcohol and water are mixed at a specific ratio has high phosphorylation activity and sugar uptake of AMP kinase. It was found to have promoting activity.
- Production Example 2 Fractionation of Extract C by ODS Column Extract C (lyophilized product) obtained in Production Example 1 was dispersed in 9 times mass of distilled water, and subjected to 10000 G centrifugation after sonication. And a supernatant was obtained. The obtained supernatant was adsorbed on a Purif-Pack Size200 ODS column. The elution mobile phase was purified water and acetonitrile-water mixture, and the flow rate was 60 ml / min.
- fractions eluted with each eluate are respectively fraction A (fraction eluted with purified water) and fraction B (fraction eluted with 5% acetonitrile-water mixture). ), Fraction C (fraction eluted with 10% acetonitrile-water mixture), fraction D (fraction eluted with 15% acetonitrile-water mixture), and fraction E (20% Fraction eluted with acetonitrile-water mixture).
- the yield of each fraction is about 58% for fraction A, about 17% for fraction B, about 15% for fraction C, when the mass of applied extract C is 100%. Pictures D and E could hardly be recovered. In addition, the precipitation component (insoluble matter) after centrifugation was about 19%.
- Test Example 2 Measurement of glucose uptake promoting activity using skeletal myotube cells Extract C obtained in Production Example 1 (Example 3-1) and fraction A obtained in Production Example 2 For ⁇ C (Examples 3-2 to 3-4) and insoluble matter (Example 3-5), the glucose uptake promoting activity of skeletal myotube cells was measured in the same manner as in Test Example 1-2. Further, in the same manner as in Test Example 1-2, a medium to which nothing was added (Comparative Example 3-1) was used as a negative control, and insulin (10 nM) (Comparative Example 3-2) was used as a positive control. The samples of Examples 3-1 to 3-5 were adjusted so that the final concentration was 0.02% by mass. The measurement results are shown in Table 3 and FIG.
- Example 3-3 (Fraction B) and Example 3-4 (Fraction C) are higher than Example 3-1 (Extract C). It was confirmed to have a sugar uptake promoting activity. In particular, Example 3-3 (Fraction B) was confirmed to have a very high sugar uptake promoting activity.
- Test Example 3 Measurement of glucose uptake promoting activity using skeletal myotube cells Extract C obtained in Production Example 1 above (Example 4-1), as well as ken 7 compounds of ferrol-3-O-glucoside, quercetin-3-O-glucoside, quercetin-3-O-galactoside, (+)-catechin, epigallocatechin gallate, rutin, and gallic acid (Examples 4-2 to For 4-8), the glucose uptake promotion of skeletal myotube cells was measured in the same manner as in Test Example 1-2.
- Example 4-3 quercetin-3-O-glucoside
- Example 4-6 epigallocatechin gallate
- Example 4-8 gallic acid
- Production Example 3 Fractionation of Extract C by Sephadex LH-20 Column Extract C (lyophilized product) obtained in Production Example 1 above was dispersed in 9 times mass of distilled water, and sonicated to 10,000 G Centrifugation was performed to obtain a supernatant. The obtained supernatant was adsorbed on a Sephadex LH-20 column (manufactured by GE Healthcare Japan). The mobile phase for elution was purified water, methyl alcohol-water mixture, and methyl alcohol, and the flow rate was 20 ml / min.
- fractions obtained by elution with each eluate are respectively fraction F (fraction eluted with purified water) and fraction G (20% methyl alcohol-water mixture). Eluted fraction), fraction H (fraction eluted with 40% methyl alcohol-water mixture), fraction I (fraction eluted with 60% methyl alcohol-water mixture), fraction J (fraction eluted with 80% methyl alcohol-water mixture), fraction K (fraction eluted with methyl alcohol), and fraction L (fraction eluted with 70% acetone-water mixture) ).
- the yield of each fraction is about 65% for fraction F, about 2% for fraction G, about 5% for fraction H, when the mass of applied extract C is 100%.
- Fraction I was about 2%
- Fraction J was about 5%
- Fraction K was about 2%
- Fraction L was about 6%.
- the component which did not elute by the said elution (insoluble content) was about 13%.
- Test Example 4 Measurement of glucose uptake promoting activity using skeletal myotube cells Extract C obtained in Production Example 1 (Example 5-1), Fraction B obtained in Production Example 2 (Example) Example 5-2) and fractions F to L (Examples 5-3 to 5-9) obtained in Production Example 3 described above were effective in promoting sugar uptake of skeletal myotube cells in the same manner as in Test Example 2. It was measured. Furthermore, as a negative control medium (Comparative Example 5-1), and as a positive control, insulin (10 nM) (Comparative Example 5-2), insulin (100 nM) (Comparative Example 5-3), and AICAR (final concentration 3 mM) (Comparative Example 5-4) was used. The samples of Examples 5-1 to 5-9 were adjusted so that the final concentration was 0.02% by mass. The obtained results are shown in Table 5 and FIG.
- Example 5-8 (Fraction K) and Example 5-9 (Fraction L) are higher in sugar than Example 5-2 (Fraction B). It was confirmed to have uptake promoting activity.
- extracts obtained from purified water at each preset temperature were obtained with 5C-1 (extract obtained with purified water at 5 ° C.) and 30C-1 (obtained with purified water at 30 ° C.), respectively. Extract), 60C-1 (extract obtained with purified water at 60 ° C.), and 80C-1 (extract obtained with purified water at 80 ° C.).
- the extracts extracted from the residue obtained with purified water at each set temperature are 5C-2 (the extract extracted from the residue obtained with purified water at 5 ° C.), 30C-2 (30 Extracted from the residue obtained with purified water at 60 ° C.), 60C-2 (extract extracted from the residue obtained with purified water at 60 ° C.), and 80C-2 (obtained with purified water at 80 ° C. Extracted from the residue).
- Reference Test Example 1 Measurement of glucose uptake promoting activity using skeletal myotube cells 30C-1 to 80C-1 (Reference Examples 3 to 6), 100C (Reference Example 7) obtained in Reference Production Example 1 above, and 30C-2 to 80C-2 (Reference Examples 8 to 11) and the fraction B (Reference Example 2) obtained in Production Example 2 were subjected to the same procedure as in Test Example 1-2 to determine the sugars of skeletal myotube cells. Uptake promoting activity was measured. Further, in the same manner as in Test Example 5, a medium (Reference Example 1) to which nothing was added was used as a negative control. The samples of Reference Examples 3 to 11 were adjusted so that the final concentration was 0.02% by mass. The measurement results are shown in Table 6 and FIG.
- the bamboo leaf extract (Reference Examples 3 to 11) obtained by the temperature difference two-step extraction method using purified water is more than that of Reference Example 2 (Fraction B). It showed low sugar uptake activity. From these results, it was suggested that a koji leaf extract exhibiting a good sugar uptake-promoting activity can be obtained only by extracting koji leaf with an ethyl alcohol-water mixture.
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Abstract
Description
項1.
柿葉を40~60%エチルアルコール-水混液により抽出する工程を経て得られた柿葉抽出物を含む血糖代謝改善用組成物。
項2.
柿葉を40~60%エチルアルコール-水混液により抽出する工程、及び
前記工程により得られた抽出物をオクタデシルシリル基結合シリカゲルを充填したカラムに吸着させ、5~10%アセトニトリル-水混液により溶出する工程
を経て得られた柿葉抽出物を含む、上記項1に記載の血糖代謝改善用組成物。
項3.
柿葉を40~60%エチルアルコール-水混液により抽出する工程、及び
前記工程により得られた抽出物を修飾デキストランを充填したカラムに吸着させ、70~100%メチルアルコール-水混液又は60~80%アセトン-水混液により溶出する工程
を経て得られた柿葉抽出物を含む、上記項1に記載の血糖代謝改善用組成物。
項4.
経口組成物である、上記項1~3のいずれかに記載の血糖代謝改善用組成物。
柿葉を40~60%エチルアルコール-水混液により抽出する工程を経て得られた柿葉抽出物を対象に投与する工程を含む、血糖代謝を改善及び/又は向上させる方法。
項A-2.
柿葉を40~60%エチルアルコール-水混液により抽出する工程、及び
前記工程により得られた抽出物をオクタデシルシリル基結合シリカゲルを充填したカラムに吸着させ、5~10%アセトニトリル-水混液により溶出する工程
を経て得られた柿葉抽出物を対象に投与する工程を含む、上記項A-1に記載の方法。
項A-3.
柿葉を40~60%エチルアルコール-水混液により抽出する工程、及び
前記工程により得られた抽出物を修飾デキストランを充填したカラムに吸着させ、70~100%メチルアルコール-水混液又は60~80%アセトン-水混液により溶出する工程
を経て得られた柿葉抽出物を対象に投与する工程を含む、上記項A-1に記載の方法。
柿葉を40~60%エチルアルコール-水混液により抽出する工程を経て得られた柿葉抽出物を対象に投与する工程を含む、糖尿病、高血糖、耐糖能異常、インスリン抵抗性、動脈硬化、肥満、体脂肪蓄積、脂質代謝異常、生活習慣病及び脂肪肝からなる群から選択される少なくとも1種の予防、改善及び/又は治療方法。
項B-2.
柿葉を40~60%エチルアルコール-水混液により抽出する工程、及び
前記工程により得られた抽出物をオクタデシルシリル基結合シリカゲルを充填したカラムに吸着させ、5~10%アセトニトリル-水混液により溶出する工程
を経て得られた柿葉抽出物を対象に投与する工程を含む、上記項B-1に記載の方法。
項B-3.
柿葉を40~60%エチルアルコール-水混液により抽出する工程、及び
前記工程により得られた抽出物を修飾デキストランを充填したカラムに吸着させ、70~100%メチルアルコール-水混液又は60~80%アセトン-水混液により溶出する工程
を経て得られた柿葉抽出物を対象に投与する工程を含む、上記項B-1に記載の方法。
乾燥し裁断した国産の柿葉約10gを、20倍質量の各種溶媒を用いて抽出した。抽出に用いた溶媒は、精製水、25%(wt/wt)エチルアルコール-水混液、50%(wt/wt)エチルアルコール-水混液、75%(wt/wt)エチルアルコール-水混液、及びエチルアルコールの5種である。柿葉の抽出は還流抽出装置を用い、1時間、沸騰還流の条件で実施した。抽出処理後、110メッシュのナイロンを用いて大きな不溶物を取り除いた後、定性ろ紙No.1(アドバンテック社製)を用いてろ過処理した。得られたろ液は、エチルアルコールを含有する溶媒で抽出した場合は、エバポレーターを用いてエチルアルコール分を除去した後に凍結乾燥し、精製水で抽出した場合は、ろ過処理にて得られた抽出物をそのまま凍結乾燥した。
上記製造例1で得られた柿葉抽出物の糖代謝改善作用を評価した。糖代謝改善作用の評価としては、マウス骨格筋管細胞株(C2C12細胞)におけるAMPキナーゼのリン酸化活性の測定を行い、さらに、抽出物AとCについて糖取込み促進活性の測定も行なった。
柿葉抽出物A~E(粉末)をそれぞれ培地に対して最終濃度が0.02%となるように加えて溶解したものを試料として用いた(実施例1-1~1-5)。また、ネガティブコントロールとして何も添加していない培地を用い(比較例1-1)、ポジティブコントロールとしてAICAR(最終濃度2mM)を用いた(比較例1-2)。次いで、マウス骨格筋管細胞株(C2C12細胞)を6穴細胞培養プレートに播種し、10%ウシ胎児血清および1%抗菌剤を添加したDMEM培地中で37℃、5%二酸化炭素存在下で3日間培養した。
上記試験例1で最も高いAMPキナーゼのリン酸活性を示した抽出物C、及び低いAMPキナーゼのリン酸活性を示した抽出物Aについて、下記の方法により、マウス骨格筋管細胞(C2C12細胞)を用いて、糖取込み促進活性の測定を行った。
上記製造例1により得られた抽出物C(凍結乾燥品)を9倍質量の蒸留水に分散させ、超音波処理の後に10000Gの遠心分離を行い、上清を得た。得られた上清をPurif-Pack Size200 ODSカラムに吸着させた。溶出の移動相は、精製水、及びアセトニトリル-水混液を用い、流量は60ml/minとした。溶出は、まず、精製水で10分間溶出し、次いで5%アセトニトリル-水混液で10分間溶出し、以後5%ずつアセトニトリル含有量をステップワイズさせたアセトニトリル-水混液で各10分間溶出し、20%アセトニトリル-水混液により10分間溶出した時点で終了した。その後、各溶出液を、エバポレーターで濃縮後、凍結乾燥して分画物を得た。
上記製造例1で得られた抽出物C(実施例3-1)、並びに上記製造例2で得られた分画物A~C(実施例3-2~3-4)及び不溶分(実施例3-5)について試験例1-2と同様にして骨格筋管細胞の糖取込み促進活性を測定した。さらに、試験例1-2と同様にして、ネガティブコントロールとして何も添加していない培地(比較例3-1)、ポジティブコントロールとしてインスリン (10nM)(比較例3-2)をそれぞれ用いた。なお、実施例3-1~3-5の試料は最終濃度が0.02質量%となるように調整した。測定結果を、表3及び図3に示す。
上記製造例1で得られた抽出物C(実施例4-1)、並びに柿葉に含まれることが知られている、ケンフェロール-3-O-グルコシド、ケルセチン-3-O-グルコシド、ケルセチン-3-O-ガラクトシド、(+)-カテキン、エピガロカテキンガレート、ルチン、及び没食子酸の7化合物(実施例4-2~4-8)について、試験例1-2と同様にして骨格筋管細胞の糖取込み促進を測定した。さらに、試験例1-2と同様にして、ネガティブコントロールとして何も添加していない培地(比較例4-1)、ポジティブコントロールとしてインスリン (10nM)(比較例4-2)をそれぞれ用いた。なお、実施例4-1~4-8の試料は、最終濃度が0.01質量%となるように調整した。測定結果を表4及び図4に示す。
上記製造例1により得られた抽出物C(凍結乾燥品)を9倍質量の蒸留水に分散させ、超音波処理の後に10000Gの遠心分離を行い、上清を得た。得られた上清をSephadex LH-20カラム(GEヘルスケアジャパン(株)社製)に吸着させた。溶出の移動相は、精製水、メチルアルコール-水混液、及びメチルアルコールを用い、流量は20ml/minとした。溶出は、まず、精製水で10分間溶出し、次いで20%メチルアルコール-水混液で10分間溶出し、以後20%ずつメチルアルコール含有量をステップワイズさせたメチルアルコール-水混液で各10分間溶出した。メチルアルコールによる10分間の溶出が完了した時点で、移動相を70%アセトン-水混液600mLでさらに溶出した。その後、各溶出液を、エバポレーターで濃縮後、凍結乾燥して分画物を得た。
上記製造例1で得られた抽出物C(実施例5-1)、上記製造例2で得られた分画物B(実施例5-2)、上記製造例3で得られた分画物F~L(実施例5-3~5-9)について、試験例2と同様にして骨格筋管細胞の糖取込み促進効果を測定した。さらに、ネガティブコントロールとして何も添加していない培地(比較例5-1)、並びにポジティブコントロールとして、インスリン (10nM)(比較例5-2)、インスリン(100nM)(比較例5-3)、及びAICAR(最終濃度3mM)(比較例5-4)をそれぞれ用いた。なお、実施例5-1~5-9の試料は、最終濃度が0.02質量%となるように調整した。得られた結果を表5及び図5に示す。
エチルアルコール-水混液による抽出以外の方法として、以下の温度差二段階抽出法により、柿葉抽出物を調製した。
上記参考製造例1で得られた30C-1~80C-1(参考例3~6)、100C(参考例7)、及び30C-2~80C-2(参考例8~11)、並びに上記製造例2で得られた分画物B(参考例2)について、試験例1-2と同様にして骨格筋管細胞の糖取込み促進活性を測定した。さらに、試験例5と同様にして、ネガティブコントロールとして何も添加していない培地(参考例1)を用いた。なお、参考例3~11の試料は、最終濃度が0.02質量%となるように調整した。測定結果を、表6及び図6に示す。
Claims (4)
- 柿葉を40~60%エチルアルコール-水混液により抽出する工程を経て得られた柿葉抽出物を含む血糖代謝改善用組成物。
- 柿葉を40~60%エチルアルコール-水混液により抽出する工程、及び
前記工程により得られた抽出物をオクタデシルシリル基結合シリカゲルを充填したカラムに吸着させ、5~10%アセトニトリル-水混液により溶出する工程
を経て得られた柿葉抽出物を含む、請求項1に記載の血糖代謝改善用組成物。 - 柿葉を40~60%エチルアルコール-水混液により抽出する工程、及び
前記工程により得られた抽出物を修飾デキストランを充填したカラムに吸着させ、70~100%メチルアルコール-水混液又は60~80%アセトン-水混液により溶出する工程
を経て得られた柿葉抽出物を含む、請求項1に記載の血糖代謝改善用組成物。 - 経口組成物である、請求項1~3のいずれかに記載の血糖代謝改善用組成物。
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Cited By (3)
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JP2018095623A (ja) * | 2016-12-16 | 2018-06-21 | サンスター株式会社 | 血管内皮機能改善用組成物 |
JP2020000156A (ja) * | 2018-06-29 | 2020-01-09 | サンスター株式会社 | 柿葉抽出物 |
JP2020002089A (ja) * | 2018-06-29 | 2020-01-09 | サンスター株式会社 | ポリフェノール配糖体含有組成物 |
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JP2018095623A (ja) * | 2016-12-16 | 2018-06-21 | サンスター株式会社 | 血管内皮機能改善用組成物 |
JP2020000156A (ja) * | 2018-06-29 | 2020-01-09 | サンスター株式会社 | 柿葉抽出物 |
JP2020002089A (ja) * | 2018-06-29 | 2020-01-09 | サンスター株式会社 | ポリフェノール配糖体含有組成物 |
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Also Published As
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US20160206675A1 (en) | 2016-07-21 |
TWI627962B (zh) | 2018-07-01 |
US9801917B2 (en) | 2017-10-31 |
EP3042661A4 (en) | 2017-05-17 |
SG10201801518YA (en) | 2018-03-28 |
JPWO2015033898A1 (ja) | 2017-03-02 |
EP3042661A1 (en) | 2016-07-13 |
TW201542221A (zh) | 2015-11-16 |
SG11201601371YA (en) | 2016-03-30 |
JP6382200B2 (ja) | 2018-08-29 |
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