WO2015199169A1 - カテキンの機能性増強法 - Google Patents
カテキンの機能性増強法 Download PDFInfo
- Publication number
- WO2015199169A1 WO2015199169A1 PCT/JP2015/068302 JP2015068302W WO2015199169A1 WO 2015199169 A1 WO2015199169 A1 WO 2015199169A1 JP 2015068302 W JP2015068302 W JP 2015068302W WO 2015199169 A1 WO2015199169 A1 WO 2015199169A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- action
- catechin
- eriodictyol
- extract
- gallate
- Prior art date
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- 238000000034 method Methods 0.000 title claims description 38
- 125000004403 catechin group Chemical group 0.000 title 1
- 239000000284 extract Substances 0.000 claims abstract description 67
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- 235000005487 catechin Nutrition 0.000 claims abstract description 47
- 229930003949 flavanone Natural products 0.000 claims abstract description 46
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- SBHXYTNGIZCORC-ZDUSSCGKSA-N eriodictyol Chemical group C1([C@@H]2CC(=O)C3=C(O)C=C(C=C3O2)O)=CC=C(O)C(O)=C1 SBHXYTNGIZCORC-ZDUSSCGKSA-N 0.000 claims description 171
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Images
Classifications
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
- A23L33/00—Modifying nutritive qualities of foods; Dietetic products; Preparation or treatment thereof
- A23L33/10—Modifying nutritive qualities of foods; Dietetic products; Preparation or treatment thereof using additives
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- A61K31/33—Heterocyclic compounds
- A61K31/335—Heterocyclic compounds having oxygen as the only ring hetero atom, e.g. fungichromin
- A61K31/35—Heterocyclic compounds having oxygen as the only ring hetero atom, e.g. fungichromin having six-membered rings with one oxygen as the only ring hetero atom
- A61K31/352—Heterocyclic compounds having oxygen as the only ring hetero atom, e.g. fungichromin having six-membered rings with one oxygen as the only ring hetero atom condensed with carbocyclic rings, e.g. methantheline
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- A61K31/335—Heterocyclic compounds having oxygen as the only ring hetero atom, e.g. fungichromin
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- A61K31/352—Heterocyclic compounds having oxygen as the only ring hetero atom, e.g. fungichromin having six-membered rings with one oxygen as the only ring hetero atom condensed with carbocyclic rings, e.g. methantheline
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- A61K31/7042—Compounds having saccharide radicals and heterocyclic rings
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23V—INDEXING SCHEME RELATING TO FOODS, FOODSTUFFS OR NON-ALCOHOLIC BEVERAGES AND LACTIC OR PROPIONIC ACID BACTERIA USED IN FOODSTUFFS OR FOOD PREPARATION
- A23V2002/00—Food compositions, function of food ingredients or processes for food or foodstuffs
Definitions
- the present invention relates to a functional food containing a green tea extract or catechin, and a citrus extract or flavanone or a glycoside thereof.
- Vaginal cancer currently accounts for one-third of the nation's death, and the establishment of appropriate treatment is an urgent issue.
- the therapeutic environment is improving with the introduction of bortezomib, a specific inhibitor for lenalidomide and proteasome.
- bortezomib a specific inhibitor for lenalidomide and proteasome.
- an anticancer agent having a mechanism of action different from that of the conventional one.
- the dose limiting toxicity (DLT) is different, it can be used in combination with existing therapies and a more effective treatment strategy can be planned.
- Non-patent Document 1 Epigallocatechin-O-gallate
- ⁇ one of the main catechins contained in green tea
- Non-patent Document 2 a type of blood cancer A phase II clinical trial is being conducted in a patient with chronic lymphocytic leukemia
- 67LR Laminin Receptor
- This 67LR cocoon was originally discovered as a protein that binds to laminin, a basement membrane component (Non-patent Document 7).
- Non-patent document 8 67LR is abnormally enhanced in cancer cells
- Non-patent document 9-15 a strong correlation between its expression and invasion and metastasis has been observed
- EGCG has been reported to selectively kill only leukemia cells and multiple myeloma cells via 67LR
- Non-patent Document 16-17 EGCG is a molecular target for 67LR-positive leukemia cells and multiple myeloma cells It was shown that it can be an agent.
- the lethal action of EGCG on leukemia cells and multiple myeloma cells is limited (Non-patent Document 2), and the use of EGCG as an anticancer agent is strongly desired.
- Epigallocatechin-3-O-gallate disrupts stress fibers and the contractile ring by reducing myosin regulatory light chain phosphorylatio mediated through the target molecule 67 kDa phylin. ; 333: 628-635.
- Umeda D Yano S, Yamada K, et al. Involvement of 67-kDa laminin receptor-mediated myosin phosphatase activation in antiproliferative effect of epigallocatechin-3-O-gallate at a physiological concentration on Biochem Bios . Res. Commun., 2008; 371: 172-176.
- Kanda H Tateya S, Tamori Y, et al. MCP-1 contributes to macrophage infiltration into adipose tissue, insulin resistance, and hepatic steatosis in obesity. J. Clin. Invest. 2006; 116 (6): 1494-1505.
- Fujimura Y Yamada K, et al. TLR4 signaling inhibitory pathway induced by green tea polyphenol epigallocatechin-3-gallate through 67-kDa laminin receptor, J. Immunol., 2010; 185: 33-45.
- Yan H Lamm ME, Bjorling E, Huang YT.
- An object of the present invention is to provide a composition comprising a green tea extract or catechin and a citrus extract or flavanone or a glycoside thereof.
- the present inventors have found that a composition containing a green tea extract or catechin and a citrus extract or flavanone or a glycoside thereof has an anticancer effect and an antimuscular atrophy effect.
- the present inventors have found that it has various actions such as anti-obesity action and has completed the present invention. That is, the present invention is a composition comprising a green tea extract or catechin and a citrus extract or flavanone or a glycoside thereof.
- this invention is a functional food containing a green tea extract or catechin and a citrus extract or flavanone or flavanone glycoside.
- the present invention provides an anticancer agent, an antimuscular atrophy agent, an antiobesity agent, an anti-inflammatory agent, a cholesterol-lowering agent, a thrombus containing a green tea extract or catechin and a citrus extract or flavanone or a glycoside thereof.
- it is any agent selected from the group consisting of a cerebral infarction preventive agent and an immunopotentiator.
- the present invention provides an anti-cancer effect, anti-muscular atrophy effect, anti-obesity effect, anti-inflammatory effect, cholesterol-lowering effect, thrombus or brain of a green tea extract or catechin containing a citrus extract or flavanone or a glycoside thereof.
- the present invention provides the subject of the green tea extract or catechin, characterized in that the subject ingests a composition containing the green tea extract or catechin and the citrus extract or flavanone or a glycoside thereof.
- a method for enhancing at least one action selected from the group consisting of an anticancer action, an antimuscular atrophy action, an antiobesity action, an anti-inflammatory action, a cholesterol lowering action, a thrombus or cerebral infarction preventing action and an immune enhancing action in a specimen human Excluding medical practices for
- the green tea extract or catechin is at least one selected from the group consisting of epicatechin, epigallocatechin, epicatechin gallate, gallocatechin gallate, epigallocatechin gallate and methylated catechin.
- the citrus extract or flavanone or its glycoside is at least one selected from the group consisting of eriodictyol, naringenin and hesperetin, and these glycosides.
- the green tea extract or catechin is gallocatechin gallate, epigallocatechin gallate or methylated catechin
- the citrus extract or flavanone is eriodictyol.
- composition, food, agent and enhancer of the present invention are selected from the group consisting of an anticancer effect, an antimuscular atrophy effect, an antiobesity effect, an antiinflammatory effect, a cholesterol lowering effect, a thrombus or cerebral infarction preventive effect, and an immune enhancing effect. It has at least one action selected.
- compositions comprising a green tea extract or catechin and a citrus extract or flavanone or a glycoside thereof.
- the composition of the present invention is useful as a functional food or the like for the purpose of anticancer action, antimuscular atrophy action, antiobesity action and the like.
- the figure which shows the combined effect of Eriodictyol with respect to the cancer cell apoptosis induction effect of EGCG Human multiple myeloma cell line U266 was seeded on a 96-well plate (5 ⁇ 10 4 cells / mL) and cultured in a medium supplemented with EGCG and Eriodictyol (5 ⁇ M / L) for 96 hours. After the cells were collected, the cells were stained with Annexin V Alexa Fluor 488, and the cells in which apoptosis was induced were detected with a flow cytometer.
- Multiple myeloma cell line MPC-11 was injected subcutaneously into the right back of Balb / c mice, and EGCG (15 mg / kg) and Eriodictyol (15 mg / kg) were administered once every two days. Tumor volume and survival time were measured from the start of administration. The figure which shows the hepatotoxicity by EGCG (TM) and Eriodictyol (TM) combination with respect to the tumor transplant mouse
- Multiple myeloma cell line MPC-11 was injected subcutaneously into the right back of Balb / c mice, and EGCG (15 mg / kg) and Eriodictyol (15 mg / kg) were administered once every two days.
- AST serum Aspartate Aminotransferase
- ALT Alanine aminotransferase
- C57BL / 6J mice were fed a diet supplemented with green tea extract (0.2%) and Eriodictyol (0.45 g / kg diet). After 8 weeks of breeding, body weight, total cholesterol in serum, and LDL levels were measured. In addition, the mRNA expression level of MCP-1 in adipose tissue was measured by a real-time PCR method.
- C57BL / 6J mice were fed a diet supplemented with green tea extract (0.2%) and Eriodictyol (0.45 g / kg diet).
- HMGCR 3-hydroxy-3-methylglutaryl-CoA reductase
- drug discovery target for cholesterol-lowering drugs such as lovastatin HMGCS (3-hydroxy-3-methylglutaryl-CoA reductase): involved in cholesterol synthesis
- Enzyme LDLR low density lipoprotein receptor
- C57BL / 6J mice were fed a diet supplemented with green tea extract (0.2%) and Eriodictyol (0.45 g / kg diet). After 8 weeks of breeding, the amount of TFPI in serum was measured using ELISA method. The figure which shows the combined intake effect of the green tea extract and Eriodictyol with respect to serum IgA amount.
- C57BL / 6J mice were fed a diet supplemented with green tea extract (0.2%) and Eriodictyol (0.45 g / kg diet). After 8 weeks of breeding, serum IgA levels were measured using ELISA.
- Human multiple myeloma cell line U266 was seeded on a 96-well plate (5 ⁇ 10 4 cells / mL) and treated with anti-67LR antibody (20 ⁇ g / mL) for 3 hours. Thereafter, the cells were cultured for 96 hours in a medium supplemented with 5 ⁇ M Eriodictyol and EGCG to a final concentration of 5 ⁇ M, and the number of viable cells was counted.
- MPC-11 Multiple myeloma cell line MPC-11 was transplanted subcutaneously (1 ⁇ 10 6 cells) into the right back of Balb / c mice and administered EGCG (15 mg / kg) and Eriodictyol (15 mg / kg) for 6 hours Later, the tumor was removed. Tumor tissue sections were prepared, and the proportion of cells in which caspase-3 was activated was measured by immunohistochemical staining. The figure which shows the influence which Eriodictyol has on the anticancer activity of EGCG and its structural analog.
- Human multiple myeloma cell line U266 was seeded on a 24-well plate at 5 ⁇ 10 4 cells / mL in RPMI 1640 medium containing SOD (5 U / mL), Catalase (200 U / mL) and 1% FCS. The number of viable cells was measured by trypan blue method 96 hours after adding each component. The figure which shows the influence which Eriocitrin exerts on the anticancer action of EGCG and its structural analog.
- Human multiple myeloma cell line U266 was seeded on a 24-well plate at 5 ⁇ 10 4 cells / mL in RPMI 1640 medium containing SOD (5 U / mL), Catalase (200 U / mL) and 1% FCS. The number of viable cells was measured by trypan blue method 96 hours after adding each component. The figure which shows the influence which Naringin has on the anticancer action of EGCG and its structural analog.
- Human multiple myeloma cell line U266 was seeded on a 24-well plate at 5 ⁇ 10 4 cells / mL in RPMI 1640 medium containing SOD (5 U / mL), Catalase (200 U / mL) and 1% FCS. The number of viable cells was measured by trypan blue method 96 hours after adding each component.
- Eriodictyol a kind of polyphenol, enhances the anticancer activity of EGCG. Furthermore, Eriodictyol has shown that EGCG enhances the anti-obesity, anti-inflammatory, cholesterol-lowering, anti-thrombotic, immune-enhancing and anti-muscular atrophy effects of EGCG. In addition, it has been clarified that Eriodictyol or a structural analog or glycoside thereof, or a natural product containing Eriodictyol significantly enhances the action of EGCG or a structural analogue thereof or the action of a natural product containing EGCG.
- Tea extract is reported to have anti-cancer, anti-insulin resistance, anti-inflammatory, anti-allergic, anti-muscular atrophy, arteriosclerosis, anti-thrombotic, or Alzheimer prevention .
- Previous studies have shown that EGCG, a green tea polyphenol koji, expresses a variety of physiological activities by binding to the cell surface protein 67LR. On the other hand, it was unclear whether other components would enhance or attenuate the action.
- the present inventor confirmed that Eriodictyol enhances the activation of 67LR by EGCG, and in EGvivo and in vitro, EGCG ⁇ has anticancer action, antimuscular atrophy action, anti-obesity action, anti-inflammatory action, antithrombotic action And it was clarified to promote cholesterol lowering action.
- the increase in obesity-induced MCP-1 that is alleviated by the combination of Eriodictyol and EGCG causes insulin resistance and hyperlipidemia (Non-patent Document 18). It is useful for the development of foods, pharmaceuticals or supplements that are intended to prevent or treat hyperlipidemia.
- the present inventor has revealed that the combined use of Eriodictyoly and EGCG increases the amount of blood IgA that is important in immunity. Since IgA is important in the prevention of infectious diseases (Non-Patent Document 19), the combined use of Eriodictyol and EGCG is useful for the development of foods, pharmaceuticals or supplements intended to prevent or treat infectious diseases.
- Non-Patent Document 20 By activating 67LR, EGCG not only has anti-cancer and anti-muscular atrophy effects but also anti-inflammatory effects (Non-Patent Document 20), anti-allergic effects (Non-Patent Document 21), and arteriosclerosis-preventing effects (Non-Patent Document 22), an antithrombotic action (Non-Patent Document 22), an immune enhancing action (Non-Patent Document 23), and a nerve cell protecting action (Non-Patent Document 24) are known to be exhibited.
- Non-Patent Document 20 By activating 67LR, EGCG not only has anti-cancer and anti-muscular atrophy effects but also anti-inflammatory effects (Non-Patent Document 20), anti-allergic effects (Non-Patent Document 21), and arteriosclerosis-preventing effects (Non-Patent Document 22), an antithrombotic action (Non-Patent Document 22), an immune enhancing action (Non-Patent Document 23), and a nerve
- the combination of the above (a1), (a2) or (a3) and (b1), (b2) or (b3) is a disease caused by the above action, such as a thrombotic disease (for example, pulmonary embolism, DIC, Myocardial infarction or cerebral infarction), cancer, muscle atrophy, obesity, insulin resistance disease, inflammatory disease (Schleen's disease, collagen disease, etc.), allergic disease, arteriosclerosis, neurodegenerative diseases (Alzheimer, dementia, etc.) ) Is useful as a food, medicine or supplement intended for prevention or treatment.
- a thrombotic disease for example, pulmonary embolism, DIC, Myocardial infarction or cerebral infarction
- cancer muscle atrophy
- obesity insulin resistance disease
- inflammatory disease Schoen's disease, collagen disease, etc.
- allergic disease arteriosclerosis
- neurodegenerative diseases Alzheimer's syndrome, dementia, etc.
- Green tea extract is the extract produced from the tea tree which is an evergreen tree of the camelliaceae.
- examples of the green tea tree used in the present invention include tea trees such as Camellia thaliensis and Camellia sinensis.
- tea leaves from these tea trees include sencha, gyokuro, sayha, stalk tea, bud tea, brown rice tea, powdered tea, matcha tea, kama sencha tea, mochi tea, baling tea, oolong tea, black tea, etc. .
- an extraction solvent for the tea leaf component from the tea tree water, an organic solvent, or a mixture thereof is used.
- organic solvent examples include lower alcohols having 1 to 4 carbon atoms such as methanol, ethanol, propanol, isopropanol, n-butanol, isobutanol, sec-butanol, tert-butanol, dimethyl ketone, methyl ethyl ketone, acetone, and methyl isobutyl ketone.
- polar organic solvents such as ketones and the like, and nonpolar organic solvents such as methyl acetate, ethyl acetate, butyl acetate, and diethyl ether. Furthermore, a mixture in which these polar organic solvent and nonpolar organic solvent are appropriately combined can also be used.
- Hot water, ethanol, and hydrous ethanol are preferable.
- the alcohol concentration of the hydrous alcohol is 30 v / v% to 90 v / v%, preferably 40 v / v% to 70 v / v%.
- the temperature is 40 to 100 ° C, preferably 60 to 100 ° C.
- Examples of the extraction method for obtaining the extract include known methods such as extraction by immersion, heat extraction, continuous extraction, and supercritical extraction.
- the extract may then be concentrated by known methods.
- the obtained extract or concentrate may be further purified by a known method.
- Examples of the purification method include ultrafiltration, adsorption resin treatment, molecular chromatography, partition chromatography, liquid-liquid extraction and the like.
- the tea leaf extract contains polyphenols and catechins.
- the tea extract preferably contains catechin, epicatechin, epigallocatechin, catechin gallate, epicatechin gallate, gallocatechin gallate, epigallocatechin gallate, methylated catechin, etc., and contains epigallocatechin gallate. More preferably.
- the methylated catechins in the present invention are mainly epigallocatechin-3-O- (3-O-methyl) gallate (hereinafter referred to as EGCG3 ′′ Me), epicatechin-3-O- (3-O-methyl) gallate ( ECG3 ′′ Me), epicatechin-3-O- (4-O-methyl) gallate (hereinafter referred to as ECG4 ′′ Me), epigallocatechin-3-O- (4-O-methyl) gallate (hereinafter referred to as ECG3 ′′ Me) , EGCG4 "Me), gallocatechin-3-O- (3-O-methyl) gallate (hereinafter referred to as GCG3" Me), catechin-3-O- (3-O-methyl) gallate (hereinafter referred to as CG3 "Me).
- EGCG3 ′′ Me epigallocatechin-3-O- (3-O-methyl) gallate
- ECG4 ′′ Me epicatechin-3-O- (4-O-methyl) gallate
- G4 Catechin-3-O- (4-O-methyl) gallate
- CG4 ′′ Me Catechin-3-O- (4-O-methyl) gallate
- G4 "as Me) and it is preferable to include these isomerate.
- catechin different from the catechin contained in a tea extract can be contained in a composition.
- examples include synthetic catechins. Synthetic catechins can be obtained by known methods (Chem. Asian J. 2010, 5, 2231-2248. DOI: 10.1002 / asia.201000372).
- Citrus extract is an extraction-treated product from citrus, and contains flavanone and the like.
- citrus fruits include the following.
- Karachichi and kumquats can be used.
- an organic solvent As the extraction solvent used for extracting citrus fruits, water, an organic solvent, or a mixture thereof is used as described above.
- the organic solvent include lower alcohols having 1 to 4 carbon atoms such as methanol, ethanol, propanol, isopropanol, n-butanol, isobutanol, sec-butanol, tert-butanol, dimethyl ketone, methyl ethyl ketone, acetone, and methyl isobutyl ketone.
- polar organic solvents such as ketones and the like, and nonpolar organic solvents such as methyl acetate, ethyl acetate, butyl acetate, and diethyl ether.
- the extract is water or ethanol.
- a mixture in which these polar organic solvent and nonpolar organic solvent are appropriately combined can also be used.
- the extraction method for obtaining the extract include known methods such as extraction by immersion, heat extraction, continuous extraction, and supercritical extraction.
- the extract may then be concentrated by known methods.
- the obtained extract or concentrate may be further purified by a known method.
- the purification method include ultrafiltration, adsorption resin treatment, molecular chromatography, partition chromatography, liquid-liquid extraction and the like.
- the citrus extract contains flavanone.
- the citrus extract preferably contains eriodictyol, naringenin and hesperetin and their glycosides (eriodictyol glycoside, naringenin glycoside, hesperetin glycoside) and the like. It is more preferable to contain.
- the flavanone different from the flavanone contained in a citrus extract can be contained in a composition. Examples thereof include synthetic flavanones and glycosyl transfer compounds obtained by linking sugars to flavanones.
- synthetic eriodictyol, synthetic naringenin, synthetic hesperetin and the like can be mentioned, and these can be used alone or in combination.
- Synthetic eriodictyol, synthetic naringenin, synthetic hesperetin and the like can be obtained by a known method (European J Org Chem., 2012 (3): 449-462. Doi: 10.1002 / ejoc.201101228).
- the content rate in the composition of a citrus extract changes with dosage forms or dosage forms of a composition.
- the ratio of the tea extract or catechin to the citrus extract or flavanone or its glycoside varies depending on the degree of concentration. Preferably, it can be 100 to 0.01.
- tea extract or catechin is 90% to 0.001% by weight, preferably 30% to 0.01% by weight
- flavanone or its glycoside is 90% to 0.001% by weight, preferably Is 20% to 0.01% by weight.
- composition of the present invention may contain a carrier acceptable for foods and other known or well-known additives in addition to the above-described components.
- the additives include excipients, binders, lubricants, disintegrants, colorants, flavoring agents, emulsifiers, surfactants, solubilizers, and suspending agents that are generally used in medicine or food. , Isotonizing agents, buffering agents, preservatives, antioxidants, stabilizers, absorption promoters, and the like, and these can be used in appropriate combinations as desired.
- the composition of the present invention may be in the form of liquid, solid, powder, or gel.
- the dosage form of the composition of the present invention is an oral dosage form such as a tablet, powder, capsule (hard capsule). Agents, soft capsules), granules, pills, solutions, syrups, and the like. These preparations can be prepared according to a conventional method.
- the carrier preferably used include an aqueous medium such as water.
- compositions When the composition is in a solid form, excipients such as crystalline cellulose, magnesium stearate and calcium stearate, and a swelling agent such as corn starch and alginic acid can be used as an additive component.
- excipients such as crystalline cellulose, magnesium stearate and calcium stearate, and a swelling agent such as corn starch and alginic acid can be used as an additive component.
- the compound necessary for molding into a powder, solid agent or liquid agent include erythritol, maltitol, hydroxypropylcellulose, kaolin, talc and the like.
- the composition of the present invention has at least one action selected from the group consisting of an anticancer action, an antimuscular atrophy action, an antiobesity action, an antiinflammatory action, a cholesterol lowering action, a thrombus or cerebral infarction preventing action, and an immune enhancing action. Have.
- the composition can be used as an anticancer agent, antimuscular atrophy agent, antiobesity agent, anti-inflammatory agent, cholesterol-lowering agent, thrombus or cerebral infarction preventive agent, or immune enhancer.
- anticancer agent antimuscular atrophy agent
- antiobesity agent anti-inflammatory agent
- cholesterol-lowering agent cholesterol-lowering agent
- thrombus or cerebral infarction preventive agent or immune enhancer.
- the preparation of tea extract or catechin and citrus extract or flavanone in each of the above agents, the content of each of these components, etc. are the same as described above.
- the subject to ingest the composition of the present invention is not particularly limited, but in addition to humans, mammals other than humans, such as laboratory animals (mouse, rat, guinea pig, rabbit, etc.), livestock (cow, horse, Pigs, goats, etc.), pets (dogs, cats, etc.).
- mammals other than humans such as laboratory animals (mouse, rat, guinea pig, rabbit, etc.), livestock (cow, horse, Pigs, goats, etc.), pets (dogs, cats, etc.).
- cancer eg, amyotrophic lateral sclerosis (ALS), etc.), inflammatory disease, thrombus or cerebral infarction hyperlipidemia, prevention or treatment of infection, or Expected to improve lifestyle diseases and obesity.
- muscle atrophy eg, amyotrophic lateral sclerosis (ALS), etc.
- inflammatory disease eg., thrombus or cerebral infarction hyperlipidemia, prevention or treatment of infection, or Expected to improve lifestyle diseases and obesity
- the food of the present invention contains a tea extract or catechin and a citrus extract or flavanone or a glycoside thereof, and particularly has an anticancer action, an antimuscular atrophy action, an antiobesity action, It is used as a functional food, supplement or the like intended for at least one action selected from the group consisting of an inflammatory action, a cholesterol lowering action, a thrombus or cerebral infarction preventing action, and an immune enhancing action.
- Examples of the form of the food (particularly functional food) containing the composition of the present invention include supplements (powder, granules, soft capsules, hard capsules, tablets, chewable tablets, quick-disintegrating tablets).
- Beverages (tea, carbonated drinks, lactic acid drinks, sports drinks, etc.), confectionery (gum, chocolate, cookies, candy, etc.), oils, fat and oil foods (mayonnaise, dressing, butter, etc.), seasonings (ketchup, sauces, etc.), fluid Examples include foods, dairy products (milk, yogurt, cheese, etc.), breads, noodles (noodles, soba, ramen, pasta, cold wheat, rice noodles, etc.). However, it is not limited to these forms.
- the subject to ingest the food of the present invention is the same as described above, and is not particularly limited.
- mammals other than humans such as laboratory animals (mouse, rat, guinea pig, rabbit, etc.), livestock (Cow, horse, pig, goat, etc.), pet animals (pets such as dogs, cats, etc.).
- the content of the tea extract or catechin, and the citrus extract or flavanone or its glycoside is the same as that described in the section of the composition, and is appropriately set within the range of the mass ratio. can do.
- tea extract or catechin is 90% to 0.001% by weight, preferably 30% to 0.01% by weight
- flavanone or its glycoside is 90% to 0.001% by weight, preferably Is 20% to 0.01% by weight.
- the present inventor has demonstrated that Eriodictyol has the anticancer action, anti-obesity action, anti-inflammatory action, cholesterol lowering action, antithrombotic action, immune enhancing action and antimuscular atrophy action of EGCG. It was clarified to enhance. Accordingly, the present invention provides an anti-cancer effect, anti-muscular atrophy effect, anti-obesity effect, anti-inflammatory effect, cholesterol lowering effect, thrombus or cerebral infarction of a green tea extract or catechin containing a citrus extract or flavanone or a glycoside thereof.
- the present invention provides the subject of the green tea extract or catechin, characterized in that the subject ingests a composition containing the green tea extract or catechin and the citrus extract or flavanone or a glycoside thereof.
- a method of enhancing at least one action selected from the group consisting of an anticancer action, an antimuscular atrophy action, an antiobesity action, an antiinflammatory action, a cholesterol lowering action, a thrombus or cerebral infarction preventing action, and an immune enhancing action (However, medical practices for humans can be excluded).
- a citrus extract or flavanone or a glycoside thereof as an enhancer or enhancement method, it can be applied in the same manner as described in the section of the composition.
- the subject to be subjected to the enhancing agent and the enhancing method of the present invention is the same as described above, and is not particularly limited.
- mammals other than humans such as laboratory animals (mouse, rat, guinea pig) , Rabbits, etc.), livestock (cattle, horses, pigs, goats, etc.), pets (dogs, cats, etc.).
- livestock cattle, horses, pigs, goats, etc.
- pets dogs, cats, etc.
- FCS was then added to RPMI 1640 medium and used for cell culture.
- double staining using Annexin V and PI was performed.
- PI Propidium Iodide
- PBS 1 was prepared by dissolving NaCl 8.0 g, KCl 0.2 g, Na 2 HPO 4 1.15 g, KH 2 PO 4 0.2 g in 1 L of ultrapure water, and autoclaved.
- the Annexin V Binding Buffer used was adjusted to 10 mM HEPES, 140 mM NaCl; 2.5 mM CaCl 2 (Wako); pH 7.4 and subjected to filter sterilization.
- the Eriodictyol used was adjusted to 5 mM with 100% dimethyl sulfoxide (DMSO) and stored at ⁇ 30 ° C.
- EGCG purchased from Sigma was adjusted to 5 mM with ultrapure water and stored at ⁇ 30 ° C.
- the well-suspended cell culture solution is centrifuged at 300 ⁇ g 5 min, the supernatant is removed, then suspended in Annexin V Binding Buffer, the number of cells is counted with a hemocytometer, and again 300 ⁇ g The solution was centrifuged at 5 minutes, and suspended in Annexin V binding binding buffer.
- Annexin (V) Alexa Fluor (488) Conjugate 5 ⁇ L (Invitrogen) was added, and PI staining solution (2 ⁇ L) was added, and the mixture was left at room temperature for 15 minutes.
- Annexin V binding buffer 400 ⁇ L was added from above, and measurement was performed using a flow cytometer “FACS Caliber” (Becton, “Dickinson” and “Company”). After applying the compensation, Annexin V Alexa Fluor 488 Conjugate was measured with FL 1 and apoptotic cells were regarded as positive cells.
- mice Preliminary 5-week-old female balb / c mice for 2 weeks, then the mouse multiple myeloma cell line MPC-11 to be 5 ⁇ 10 6 cells / mL
- the cell suspension suspended in RPMI medium was subcutaneously injected into the right back of each mouse under isoflurane (Mylan Pharmaceutical, Tokyo, Japan) anesthesia and transplanted.
- EGCG (15 mg / kg ip)
- Eriodictyol 15 mg / kg ip
- Tumor volume was calculated by the following formula.
- ⁇ Tumor volume (mm 3 ) (minor axis) 2 x major axis x 0.5> From an ethical point of view, those with tumor volumes exceeding 4000 mm 3 were sacrificed by cardiac blood sampling under isoflurane (Mylan Pharmaceutical, Tokyo, Japan) anesthesia.
- mice Hepatotoxicity of EGCG and Eriodictyol in combination with tumor transplanted mice
- a cell suspension of mouse multiple myeloma cell line MPC-11 suspended in RPMI medium at 5 ⁇ 10 6 cells / mL was obtained.
- Isoflurane Mylan Pharmaceutical, Tokyo, Japan
- 200 ⁇ L of each mouse was subcutaneously injected into the right back surface of each mouse for transplantation.
- EGCG (15 mg / kg ip)
- Eriodictyol 15 mg / kg ip
- the collected blood was allowed to stand at 37 ° C. for 2 hours to clot and then centrifuged at 4 ° C. and 2000 ⁇ g for 15 minutes to collect serum.
- Aspartate Aminotransferase (AST) and Alanine aminotransferase (ALT) activities in serum were measured using a kit (Wako).
- mice were divided into 5 groups so that the average body weights were equal, and the GR (Ground) group, TS (Tail suspension) group, EGCG group, Eriodictyol group, EGCG + Eriodictyol group, respectively. did.
- physiological saline was administered from the beginning of the grouping, EGCG was administered to the EGCG group, Eriodictyol was administered intragastrically to the Eriodictyol group (5 mg / kg), and EGCG and Eriodictyol were administered to the EGCG + Eriodictyol group. (5 mg / kg) was intragastrically administered with a sonde. Seven days after the start of grouping, the animals were reared normally, and then the TS group, EGCG group, Eriodictyol group, and EGCG + Eriodictyol group were subjected to the tail suspension test.
- mice Ten days after the tail suspension test (17 days after the start of the experiment), all mice were sacrificed by blood sampling of the abdominal aorta under isoflurane anesthesia, and the quadriceps muscles were removed and weighed. Each sample was administered daily for the duration of the experiment.
- mice fed high fat and high sucrose (HF / HS) diet After 12-week-old male C57BL / 6J mice have been preliminarily raised for 1 week, they are divided into 5 groups so that the average body weights are equal.
- Control AIN-93G compliant diet
- HF / HS high fat high sucrose diet
- Yabukita (0.2% (HF / HS + Yabukita) group
- Eriodictyol HF / HS + Eriodictyol
- Yabukita + Eriodictyol HF / HS + Yabukita + Eriodictyol
- mice were abdominal aorta under isoflurane anesthesia after 16 hours of fasting.
- the collected blood was allowed to stand at 37 ° C. for 2 hours and allowed to clot, and then the serum was collected by centrifugation at 4 ° C. and 2000 ⁇ g for 15 minutes, and the total cholesterol and LDL levels in the serum were measured.
- Adipose tissue was treated with trizol, and the mRNA expression level of MCP-1 was measured by real-time PCR after cDNA synthesis.
- HMCGS 3-hydroxy-3-methylglutaryl-CoA reductase
- LDLR low density lipoprotein receptor
- tissue factor pathway inhibitor TFPI
- RPMI 1640 medium used for cultivation was suspended after suspension of 10.4 g of RPMI 1640 medium, 2.38 g of HEPES, 100,000 units of penicillin G potassium for injection, 100 mg of streptomycin sulfate for injection, and 2.0 g of NaHCO 3 per liter of ultrapure water.
- the filter was sterilized.
- 100 g of fruit peel was collected from 6 lemons using a grater, added with 100 mL of 100% EtOH, and crushed in a mortar. Further, the fiber was removed with gauze, and the precipitate was removed by natural filtration using No. 1 filter paper and funnel. Thereafter, centrifugation was performed at 12000 ⁇ g, and the supernatant was collected.
- the resulting lemon ethanol extract was evaporated using an evaporator to obtain a lemon ethanol extract fraction.
- This lemon ethanol extract fraction was redissolved in DMSO to obtain a lemon extract.
- U266 was adjusted to 5 ⁇ 10 4 cells / mL in RPMI 1640 containing 1% FCS SOD (5 U / mL) and Catalase (200 U / mL) and seeded on a 96-well plate.
- EGCG, EGCG3 ” Me Eriodictyol, Eriodictyol-related substances (Naringenin, Hesperetin) and food containing Eriodictyol were added to the cancer cell killing-inducing activity of green tea extract and cultured for 96 hours, and the number of viable cells was measured by trypan blue method.
- RPMI1640 medium supplemented with 10% FCS at 37 ° C. under 5% CO 2 with water vapor saturation. Cells were maintained in culture in the logarithmic growth phase.
- RPMI 1640 medium used for cultivation was suspended after suspension of 10.4 g of RPMI 1640 medium, 2.38 g of HEPES, 100,000 units of penicillin G potassium for injection, 100 mg of streptomycin sulfate for injection, and 2.0 g of NaHCO 3 per liter of ultrapure water. The filter was sterilized.
- the plate was washed three times, 100 ⁇ L of Phosphoserine Detection Antibody was added and left at 30 ° C. for 60 minutes. Thereafter, the plate was washed three times, 100 ⁇ L of HRP-Antibody Conjugate was added, and the plate was left at 30 ° C. for 60 minutes. Thereafter, the plate was washed three times, and 100 ⁇ L of the substrate TMB solution was added. After standing at 30 ° C. for 20 minutes, 100 ⁇ L of stop solution was added, and the absorbance was measured with a 450 nm plate reader.
- mice 5 weeks old female balb / c mice were pre-bred for 2 weeks and then mouse multiple myeloma cell line A cell suspension obtained by suspending MPC-11 in RPMI medium at 5 ⁇ 10 6 cells / mL was transplanted subcutaneously into the right back of 200 ⁇ L. Eleven days after transplantation, EGCG (15 mg / kg ip) and Eriodictyol (15 mg / kg ip) were administered and sacrificed 6 hours later. The tumor was removed, lysed, and centrifuged.
- the supernatant is adjusted to 2 mg protein / mL with PBS, then 20 ⁇ L is dispensed into an Eppendorf tube, and the substrate mixture (BODIPY-C12-SM 2 ⁇ L, 10% Triton 10 ⁇ L, 1M sodium acetate pH 4.5 8 ⁇ L of 20 ⁇ L dH2O) was added, mixed by tapping, flushed, and incubated at 37 ° C. for 8 hours.
- the substrate mixture BODIPY-C12-SM 2 ⁇ L, 10% Triton 10 ⁇ L, 1M sodium acetate pH 4.5 8 ⁇ L of 20 ⁇ L dH2O
- mice Effect of Eriodictyol on 67LR-dependent cancer cell lethal activity (Caspase-3 activity) of EGCG 5 weeks old female balb / c mice were pre-bred for 2 weeks, and then the mouse multiple myeloma cell line MPC-11 was A cell suspension suspended in RPMI medium at 10 6 cells / mL was transplanted subcutaneously into the right back of 200 ⁇ L. Eleven days after transplantation, EGCG (15 mg / kg ip) and Eriodictyol (15 mg / kg ip) were administered once every two days and sacrificed 6 hours later. The tumor was removed, tissue sections were prepared, and the number of cells in which Caspase-3 was activated was measured by immunohistochemical staining.
- Example 1 Effect of combined use of Eriodictyol on the cancer cell apoptosis-inducing action of EGCG (Fig. 1)
- human multiple myeloma cell line U266 was adjusted to 5 ⁇ 10 4 cells / mL and seeded in a 96 well plate, and EGCG and Eriodictyol were added. They were added to a final concentration of 5 ⁇ M and cultured for 96 hours. After 96 hours of culture, 5 ⁇ L (Invitrogen) of Annexin V Alexa Fluor 488 Conjugate was added.
- Example 2 Anticancer effect of combined use of EGCG and Eriodictyol on tumor transplanted mice (Fig. 2)
- Balb / c mice were preliminarily raised for 2 weeks, and then the mouse multiple myeloma cell line MPC-11 was adjusted to 5 ⁇ 10 6 cells / mL in RPMI medium.
- the cell suspension suspended in was injected subcutaneously into the right back.
- EGCG (15 mg / kg ip
- Eriodictyol 15 mg / kg ip
- Example 3 Hepatotoxicity of EGCG and Eriodictyol in combination with tumor transplanted mice (Fig. 3)
- EGCG (15 mg / kg ip) and Eriodictyol (15 mg / kg ip) were administered once every two days to mice transplanted with the mouse multiple myeloma cell line MPC-11.
- Aspartate Aminotransferase (AST) and Alanine aminotransferase (ALT) activities in mouse serum at the time of sacrifice were measured.
- AST Aspartate Aminotransferase
- ALT Alanine aminotransferase
- Example 4 Effect of combined EGCG and Eriodictyol on disuse muscle atrophy (Figure 4)
- the effects of EGCG and Eriodictyol on disuse muscle atrophy in mice induced by tail suspension test were investigated. Water or each sample was intragastrically administered to C57BL / 6J mice once a day using a sonde. Seven days after the start of administration, the tail suspension test was started. Ten days after the start of the tail suspension test, the mice were killed by blood sampling of the abdominal aorta under isoflurane anesthesia, and the quadriceps muscle was removed and weighed.
- Example 5 Effect of combined use of green tea extract and Eriodictyol on mice fed high fat and high sucrose (HF / HS) diet (Fig. 5)
- HF / HS high sucrose
- Fig. 5 We investigated the effects of Yabukitaki and Eriodictyol on obesity in high-fat, high-sucrose diet-fed obese model mice. Twelve-week-old male C57BL / 6J mice were bred for 1 week, then divided into groups so that the average body weights were equal, and were fed at 4 g / day for 8 weeks with free drinking. The body weight was fasted for 16 hours after measurement, and then sacrificed by blood sampling of the abdominal aorta under isoflurane anesthesia. Blood collected by blood collection was allowed to stand at 37 ° C.
- Example 6 Effect of combined use of green tea extract and Eriodictyol on cholesterol metabolism-related gene expression in the liver of mice fed a high fat, high sucrose (HF / HS) diet (Fig. 6)
- HF / HS high sucrose
- Fig. 6 We examined the effects of Yabutaki and Eriodictyol on the expression of cholesterol metabolism-related genes in the liver in high fat, high sucrose diet-fed obese model mice.
- C57BL / 6J mice were preliminarily raised for 1 week and then divided into groups so that the average body weights were equal. Feed was given at 4 g / day for 8 weeks with free drinking. After fasting for 16 hours, the mice were sacrificed by blood collection of abdominal aorta under isoflurane anesthesia.
- Liver tissue was treated with trizol, and mRNA expression levels of HMGCR, HMCGS and LDLR were measured by real-time PCR after cDNA synthesis. As a result, no effect was observed in the Yabukita and Eriodictyol alone groups, whereas in the Yabukita and Eriodictyol combination group, decreased expression levels of HMGCR and HMCGS in the liver were observed. In addition, the expression level of LDLR in the liver was increased.
- Example 7 Effect of combined use of green tea extract and Eriodictyol on antithrombotic factor production ( Figure 7)
- the effects of Yabutaki and Eriodictyol on antithrombotic factor production in mice were investigated. Twelve-week-old male C57BL / 6J mice were bred for 1 week, then divided into groups so that the average body weights were equal, and were fed at 4 g / day for 8 weeks with free drinking. After fasting for 16 hours, the mice were sacrificed by blood collection of abdominal aorta under isoflurane anesthesia. Blood collected by blood collection was allowed to stand at 37 ° C. for 2 hours to clot, and then centrifuged at 4 ° C. and 2000 ⁇ g for 15 minutes to collect serum.
- TFPI that is an antithrombotic factor in serum was measured by ELISA. As a result, there was no effect in the Yabuki alone group, whereas an increase in the expression level of TFPI was observed in the Yabuki and Eriodictyol combination group.
- Example 8 Effect of combined use of green tea extract and Eriodictyol on serum IgA levels.
- Twelve-week-old male C57BL / 6J mice were bred for 1 week, then divided into groups so that the average body weights were equal, and were fed at 4 g / day for 8 weeks with free drinking. After fasting for 16 hours, the mice were sacrificed by blood collection of abdominal aorta under isoflurane anesthesia. Blood collected by blood collection was allowed to stand at 37 ° C. for 2 hours to clot, and then centrifuged at 4 ° C. and 2000 ⁇ g for 15 minutes to collect serum. The amount of IgA in the serum was measured by ELISA. As a result, the Yabuki alone group had no effect, whereas the Yabukita and Eriodictyol combination group showed an increase in IgA.
- Example 9 Combined effect of Eriodictyol, Eriodictyol-related substances (Naringenin, Hesperetin) and Eriodictyol-containing food extract on the cancer cell killing-inducing activity of EGCG, EGCG3 ”Me, green tea extract ( Figure 9)
- human multiple myeloma cell line U266 The cells were adjusted to 4 cells / mL and seeded on a 96 well plate, EGCG and Eriodictyol were added to a final concentration of 5 ⁇ M, and the cells were cultured for 96 hours.
- Example 10 67LR dependence of EGCG activity enhancement by Eriodictyol (Fig. 10)
- U266 cells were adjusted to 5 ⁇ 10 4 cells / mL and seeded in a 96-well plate, and anti-67LR was adjusted to a final concentration of 20 ⁇ g / mL.
- Antibody was added.
- Eriodictyol and EGCG were added to the medium to a final concentration of 5 ⁇ M.
- the number of viable cells after 96 hours of culture was measured by ATPlite One Step (Perkin Elmer).
- Example 11 Enhancement effect of Eriodictyol on Akt activation ability of EGCG (Fig. 11)
- Akt which is responsible for the 67LR-dependent cancer cell killing-inducing activity of EGCG
- Balb / c mice were transplanted subcutaneously with the mouse multiple myeloma cell line MPC-11.
- Akt activity was measured in tumors that were sacrificed and excised 6 hours after administration of EGCG (15 mg / kg ip) and Eriodictyol (15 mg / kg ip).
- Akt activity was measured in tumors that were sacrificed and excised 6 hours after administration of EGCG (15 mg / kg ip) and Eriodictyol (15 mg / kg ip).
- EGCG 15 mg / kg ip
- Eriodictyol 15 mg / kg ip
- Example 12 Enhancement effect of Eriodictyol on activation of 67LR-dependent cancer cell killing induction pathway of EGCG (acid sphingomyelinase activation) (Fig. 12)
- Fig. 12 To examine the effect of Eriodictyol on the activation of acid sphingomyelinase, which is responsible for the 67LR-dependent cancer cell killing activity of EGCG, Balb / c mice were transplanted subcutaneously with the mouse multiple myeloma cell line MPC-11.
- Example 13 Enhancement effect of Eriodictyol on 67LR-dependent cancer cell killing activity (Caspase-3 activity) of EGCG (Fig. 13)
- the mouse multiple myeloma cell line MPC-11 was introduced into a 5-week-old female balb / c mouse. Transplanted subcutaneously. Eleven days after transplantation, 6 hours after administration of EGCG (15 mg / kg ip) and Eriodictyol (15 mg / kg ip), they were sacrificed, and tissue sections of excised tumors were prepared to evaluate the activation state of Caspase-3 . As a result, it was clarified that Eriodictyol remarkably enhanced the ability of EGCG to activate Caspase-3.
- FCS was then added to RPMI 1640 medium and used for cell culture.
- PBS 1 was prepared by dissolving NaCl 8.0 g, KCl 0.2 g, Na 2 HPO 4 1.15 g, KH 2 PO 4 0.2 g in 1 L of ultrapure water, and autoclaved.
- Eriodictyol and its structural analogues Naringenin, Hesperetin and their glycosides Eriocitrin, Naringin, Hesperidin were adjusted to 5 mM with 100% dimethyl sulfoxide (DMSO), and at -30 ° C. saved.
- EGCG and (-)-Gallocatechin gallate (GCG) were adjusted to 5 mM with ultrapure water and stored at -30 ° C.
- EGCG3 ”Me was adjusted to 5 mM with 10% DMSO dH 2 O and stored at ⁇ 30 ° C.
- Example 14 Effect of Eriodictyol on the anticancer activity of EGCG and its structural analogues
- human multiple myeloma cell line U266 was adjusted to 5 ⁇ 10 4 cells / mL and seeded on a 24-well plate. And its structural analog was added to a final concentration of 5 mM and cultured for 96 hours. After culturing for 96 hours, the number of viable cells was measured by the trypan blue method.
- Eriodictyol found that EGCG and its structural analogs EGCG 3 ”Me, GCG (gallocatechin gallate) significantly enhance the anticancer activity (FIG. 14).
- Example 15 Effects of Naringenin on the anticancer activity of EGCG and its structural analogues
- human multiple myeloma cell line U266 was adjusted to 5 ⁇ 10 4 cells / mL and seeded on a 24-well plate. And its structural analog was added to a final concentration of 5 mM and cultured for 96 hours. After culturing for 96 hours, the number of viable cells was measured by the trypan blue method. As a result, we found that Naringenin significantly enhanced the anticancer activity of EGCG and its structural analogs EGCG 3 ”Me, GCG (FIG. 15).
- Example 16 Effect of Hesperetin on the anticancer activity of EGCG and its structural analogues
- human multiple myeloma cell line U266 was adjusted to 5 ⁇ 10 4 cells / mL and seeded on a 24-well plate.
- its structural analog was added to a final concentration of 5 mM and cultured for 96 hours. After culturing for 96 hours, the number of viable cells was measured by the trypan blue method. As a result, it was found that Hesperetin significantly enhances the anticancer activity of EGCG and its structural analogs EGCG 3 ”Me, GCG (FIG. 16).
- Example 17 Effects of Eriocitrin, an Eriodictyol Glycoside, on the Anticancer Activity of EGCG and Its Structural Analogues
- human multiple myeloma cell line U266 was adjusted to 5 ⁇ 10 4 cells / mL and seeded on a 24-well plate.
- its structural analog was added to a final concentration of 5 mM and cultured for 96 hours. After culturing for 96 hours, the number of viable cells was measured by the trypan blue method.
- Eriocitrin was found to significantly enhance the anticancer activity of EGCG and its structural analogs EGCG 3 ”Me, GCG (FIG. 17).
- Example 18 Effects of Naringenin glycoside Naringin on the anticancer activity of EGCG and its structural analogues
- human multiple myeloma cell line U266 was adjusted to 5 ⁇ 10 4 cells / mL and seeded on a 24-well plate.
- its structural analog was added to a final concentration of 5 mM and cultured for 96 hours. After culturing for 96 hours, the number of viable cells was measured by the trypan blue method. As a result, we found that Naringin significantly enhances the anticancer effect of EGCG (Fig. 18).
- Example 19 Effects of Hesperidin, a Hesperetin Glycoside, on the Anticancer Activity of EGCG and Its Structural Analogues
- human multiple myeloma cell line U266 was adjusted to 5 ⁇ 10 4 cells / mL and seeded on a 24-well plate. And its structural analog was added to a final concentration of 5 mM and cultured for 96 hours. After culturing for 96 hours, the number of viable cells was measured by the trypan blue method. As a result, it was found that Hesperidin significantly enhances the anticancer activity of EGCG and its structural analogs EGCG 3 ′′ Me, GCG (FIG. 19).
- composition of the present invention is useful as a functional food having an anticancer action, an anti-inflammatory action and the like.
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Abstract
Description
すなわち、本発明は、緑茶抽出物又はカテキンと、柑橘類抽出物又はフラバノン若しくはその配糖体とを含む、組成物である。
また本発明は、緑茶抽出物又はカテキンと、柑橘類抽出物又はフラバノン若しくはフラバノン配糖体とを含む、機能性食品である。
さらに、本発明は、緑茶抽出物又はカテキンと、柑橘類抽出物又はフラバノン若しくはその配糖体とを含む、抗がん剤、抗筋萎縮剤、抗肥満剤、抗炎症剤、コレステロール低下剤、血栓又は脳梗塞予防剤及び免疫増強剤からなる群から選ばれるいずれかの剤である。
さらに、本発明は、柑橘類抽出物又はフラバノン若しくはその配糖体を含む、緑茶抽出物又はカテキンの抗がん作用、抗筋萎縮作用、抗肥満作用、抗炎症作用、コレステロール低下作用、血栓又は脳梗塞予防作用及び免疫増強作用からなる群から選ばれる少なくとも1つの作用の増強剤である。
さらに、本発明は、緑茶抽出物又はカテキンと、柑橘類抽出物又はフラバノン若しくはその配糖体とを含む組成物を被検体に摂取させることを特徴とする、当該緑茶抽出物又はカテキンの、前記被検体における抗がん作用、抗筋萎縮作用、抗肥満作用、抗炎症作用、コレステロール低下作用、血栓又は脳梗塞予防作用及び免疫増強作用からなる群から選ばれる少なくとも1つの作用を増強させる方法(ヒトに対する医療行為を除く)である。
本発明において、柑橘類抽出物又はフラバノン若しくはその配糖体としては、エリオジクチオール、ナリンゲニン及びヘスペレチン、並びにこれらの配糖体からなる群から選ばれる少なくとも1種である。
本発明の好ましい態様において、緑茶抽出物又はカテキンは、ガロカテキンガレート、エピガロカテキンガレート又はメチル化カテキンであり、柑橘類抽出物又はフラバノンは、エリオジクチオールである。
本発明の組成物、食品、剤及び増強剤は、抗がん作用、抗筋萎縮作用、抗肥満作用、抗炎症作用、コレステロール低下作用、血栓又は脳梗塞予防作用及び免疫増強作用からなる群から選ばれる少なくとも1つの作用を有するものである。
本発明者は、ポリフェノールの一種Eriodictyol がEGCG の抗がん作用を増強することを明らかにした。さらに、Eriodictyol は EGCG のもつ抗肥満作用、抗炎症作用、コレステロール低下作用、抗血栓性作用、免疫増強作用及び抗筋萎縮作用を増強することを明らかにした。またEriodictyol又はその構造類似体若しくはその配糖体、又はEriodictyol を含有する天然物が、EGCG若しくはその構造類似体の作用、又はEGCG を含有する天然物の作用を顕著に高めることを明らかにした。
従って、(a1) Eriodictyol若しくはその構造類似体であるNaringenin若しくはHesperetin、(a2) 生体内でこれらのポリフェノールとして代謝されうるこれらポリフェノールの配糖体、又は(a3) これらを含有する食品と、(b1)EGCG、(b2)当該EGCGと同様に67LR アゴニストとしての作用を有するメチル化EGCG、又は(b3)これらを含有する食品との併用は、抗がん作用、抗筋萎縮作用、抗肥満作用、抗インスリン抵抗作用、抗炎症作用、抗アレルギー作用、動脈硬化予防作用、抗血栓性作用、抗神経変性作用、抗炎症性作用を有する。従って、上記(a1)、(a2)又は(a3)と(b1)、(b2)又は(b3)との組み合わせは、上記作用に起因する疾患、例えば血栓性疾患(例えば肺塞症、DIC、心筋梗塞又は脳梗塞等)、癌、筋萎縮、肥満、インスリン抵抗性疾患、炎症性疾患(シューレン病や膠原病等)、アレルギー疾患、動脈硬化、神経変性疾患(アルツハイマーや認知症等の脳疾患)の予防又は治療を意図する食品、医薬品又はサプリメントとして有用である。
本発明における緑茶抽出物は、ツバキ科の常緑樹である茶の木より作製した抽出物である。本発明において使用される緑茶の木としては、カメリアタリエンシス、カメリアシネンシスなどの茶の木が挙げられる。例えばチャノキ(Camellia sinensis (L.) Kuntze)、アッサムチャ(Camellia sinensis (L.) Kuntze var. assamica (J.W.Mast.) Kitam.)、カメリアシネンシスとカメリアタリエンシスの交配種、「やぶきた」、「べにふうき」、「べにふじ」、「べにほまれ」、「やえほ」、「するがわせ」、「ゆたかみどり」、「かなやみどり」、「おくむさし」、「青心大パン」、「青心烏龍」、「大葉烏龍」、「紅花」、「べにひかり」、「やまかい」、「やまみどり」、「からべに」、「香駿」、「そうふう」、「ふくみどり」、「みねかおり」、「べにひかり」、「みなみかおり」、「いずみ」、「ふうしゅん」、「たまみどり」、「やまかい」、「くりたわせ」、「しゅんめい」、「さやまみどり」、「あさぎり」、「ほくめい」、「ただにしき」、「あさひ」、「さやまかおり」、「めいりょく」、「やまとみどり」、「あさつゆ」、「とよか」、「なつみどり」、「うじひかり」、「おおいわせ」、「ごこう」、「印雑 131」、「まきのはらわせ」、「たかちほ」、「こまかげ」、「さみどり」、「こまかげ」、「はつもみじ」、「りょうふう」、「みなみさやか」、「さえみどり」、「おくゆたか」、「ふじみどり」、「サンルージュ」及び「おくみどり」などの茶品種が用いられ、「やぶきた」、「べにふうき」、「かなやみどり」、「おくむさし」、「そうふう」、「ふうしゅん」、「ただにしき」、「サンルージュ」がより好ましい。また、これらの茶の木からの茶葉の例としては煎茶、玉露、番茶、茎茶、芽茶、玄米茶、粉茶、抹茶、釜煎り茶、甜茶、包種茶、ウーロン茶、紅茶等が挙げられる。
茶の木からの茶葉成分の抽出溶媒として、水若しくは有機溶剤、またはこれらの混合液が用いられる。
抽出物は、その後、公知の方法で濃縮してもよい。
得られた抽出物または濃縮物等は、公知の方法で更に精製してもよい。精製方法としては、限外ろ過、吸着樹脂処理、分子クロマトグラフィー、分配クロマトグラフィー、液-液抽出等が挙げられる。
茶葉抽出物中には、ポリフェノールやカテキン類などが含まれている。茶抽出物は、カテキン、エピカテキン、エピガロカテキン、カテキンガレート、エピカテキンガレート、ガロカテキンガレート、エピガロカテキンガレート、メチル化カテキンなどが含まれていることが好ましく、エピガロカテキンガレートを含有していることが更に好ましい。
本発明におけるメチル化カテキンは主として、エピガロカテキン-3-O-(3-O-メチル)ガレート(以下、EGCG3”Meという)、エピカテキン-3-O-(3-O-メチル)ガレート(以下、ECG3”Meという)、エピカテキン-3-O-(4-O-メチル)ガレート(以下、ECG4”Meという)、エピガロカテキン-3-O-(4-O-メチル)ガレート(以下、EGCG4”Meという)、ガロカテキン-3-O-(3-O-メチル)ガレート(以下、GCG3”Meという)、カテキン-3-O-(3-O-メチル)ガレート(以下、CG3”Meという)、カテキン-3-O-(4-O-メチル)ガレート(以下、CG4”Meという)、又は、ガロカテキン-3-O-(4-O-メチル)ガレート(以下、GCG4”Meという)及びこれらの異性化体を含むことが好ましい。
また、本発明においては、茶抽出物に含まれるカテキンとは別のカテキンを組成物に含有させることができる。例えば合成カテキンなどが挙げられる。合成カテキンは、公知方法により得ることができる(Chem. Asian J. 2010, 5, 2231-2248. DOI: 10.1002/asia.201000372)。
本発明における柑橘類抽出物は、柑橘類からの抽出処理物であり、フラバノン等を含有している。柑橘類としては、例えば以下のものが挙げられる。
ミカン属(カンキツ属):
オレンジ、グレープフルーツ、ユズ、ダイダイ、カボス、スダチ、ユコウ、ゆうこう、シークヮーサー、レモン、ライム、ナツミカン、ハッサク、イヨカン、ブンタン、マンダリンオレンジ、ウンシュウミカン、ポンカン、タチバナ、紀州ミカン、バレンシアオレンジ、ネーブルオレンジ、ブラッドオレンジ、ジャッファ・オレンジ、ベルガモット、キノット等
また、上記ミカン属柑橘類のほかに、カラタチ類、キンカン類などを用いることができる。
有機溶剤としては、例えば、メタノール、エタノール、プロパノール、イソプロパノール、n-ブタノール、イソブタノール、sec-ブタノール、tert-ブタノール等の炭素数1~4の低級アルコール、ジメチルケトン、メチルエチルケトン、アセトンおよびメチルイソブチルケトン等のケトン類などの極性有機溶剤、酢酸メチル、酢酸エチル、酢酸ブチル、またはジエチルエーテル等の非極性有機溶剤が挙げられる。好ましくは、水又はエタノールである。更にこれら極性有機溶剤と非極性有機溶剤を適宜組み合わせた混合物を使用することもできる。
抽出物を得るための抽出方法は、浸漬による抽出、加熱抽出、連続抽出、超臨界抽出等の公知の方法を挙げることができる。抽出物は、その後、公知の方法で濃縮してもよい。
得られた抽出物または濃縮物等は、公知の方法で更に精製してもよい。精製方法としては、限外ろ過、吸着樹脂処理、分子クロマトグラフィー、分配クロマトグラフィー、液-液抽出等が挙げられる。
また、本発明においては、柑橘類抽出物に含まれるフラバノンとは別のフラバノンを組成物に含有させることができる。例えば合成フラバノン、フラバノンに糖を結合させた糖転移化合物などが挙げられる。例えば、合成エリオジクチオール、合成ナリンゲニン及び合成ヘスペレチンなどが挙げられ、これらを1種又は複数種混合することができる。合成エリオジクチオール、合成ナリンゲニン及び合成ヘスペレチンなどは、公知手法により得ることができる(European J Org Chem., 2012(3): 449-462. doi:10.1002/ejoc.201101228)。
また、柑橘類抽出物の組成物中の含有率は、組成物の剤型または投与形態によって異なる。
本発明の組成物において、茶抽出物又はカテキンと、柑橘類抽出物又はフラバノン若しくはその配糖体との比(茶抽出物/柑橘類抽出物、質量比)は、それぞれの濃縮程度によっても異なるが、好ましくは100~0.01とすることができる。そして、茶抽出物又はカテキン、及び柑橘類抽出物又はフラバノン若しくはその配糖体の組成物中の含有量は、上記質量比の範囲で適宜設定することができる。例えば茶抽出物又はカテキンは90重量%~0.001重量%、好ましくは30重量%~0.01重量%であり、はフラバノン若しくはその配糖体は90重量%~0.001重量%、好ましくは20重量%~0.01重量%である。
本発明の組成物は、上記の各成分以外に、食品用として許容可能な担体や公知または周知の他の添加剤を含んでいてもよい。
上記添加剤としては、一般に医薬又は食品に使用される、賦形剤、結合剤、滑沢剤、崩壊剤、着色剤、矯味矯臭剤、乳化剤、界面活性剤、溶解補助剤、懸濁化剤、等張化剤、緩衝剤、防腐剤、抗酸化剤、安定化剤、吸収促進剤等を挙げることができ、所望により、これらを適宜組み合わせて使用することもできる。
本発明の組成物は、液状、固形状、粉末、ゲル状のいずれの形態であってもよく、本発明の組成物の剤型は、経口用剤型、例えば錠剤、散剤、カプセル剤(ハードカプセル剤、ソフトカプセル剤)、顆粒剤、丸剤、液剤、シロップ、等の形態としてもよい。これらの製剤は常法に従って調製することができる。
組成物が溶液状の場合は、好ましく用いられる担体としては水等の水性媒体を挙げることができる。
また、粉末、固形剤又は液剤に成型するのに必要な化合物として、エリスリトール、マルチトール、ヒドロキシプロピルセルロース、カオリン、タルクなどが挙げられる。
本発明の組成物は、抗がん作用、抗筋萎縮作用、抗肥満作用、抗炎症作用、コレステロール低下作用、血栓又は脳梗塞予防作用及び免疫増強作用からなる群から選ばれる少なくとも1つの作用を有する。従って、上記組成物を、抗がん剤、抗筋萎縮剤、抗肥満剤、抗炎症剤、コレステロール低下剤、血栓若しくは脳梗塞予防剤、又は免疫増強剤として使用することができる。上記それぞれの剤における茶抽出物又はカテキン、及び柑橘類抽出物又はフラバノンの調製、これらの各成分の含有率等については、前記と同様である。
本発明の食品は、茶抽出物又はカテキンと、柑橘類抽出物又はフラバノン若しくはその配糖体とを含むものであり、特に抗がん作用、抗筋萎縮作用、抗肥満作用、抗炎症作用、コレステロール低下作用、血栓又は脳梗塞予防作用及び免疫増強作用からなる群から選ばれる少なくとも1つの作用を目的とした機能性食品、サプリメント等として使用される。
本発明の組成物を含有する食品(特に機能性食品)の形態としては、例えばサプリメント(散剤、顆粒剤、ソフトカプセル、ハードカプセル、錠剤、チュアブル錠、速崩錠)が挙げられるが、その他にも、飲料(お茶、炭酸飲料、乳酸飲料、スポーツ飲料等)、菓子(ガム、チョコレート、クッキー、キャンデー等)、油、油脂食品(マヨネーズ、ドレッシング、バター等)、調味料(ケチャップ、ソース等)、流動食、乳製品(牛乳、ヨーグルト、チーズ等)、パン類、麺類(うどん、そば、ラーメン、パスタ、冷麦、ビーフン等)等が挙げられる。但し、これらの形態に限定されるものではない。
本発明の食品において、茶抽出物又はカテキン、及び柑橘類抽出物又はフラバノン若しくはその配糖体の含有量は、前記組成物の項で述べた内容と同様であり、上記質量比の範囲で適宜設定することができる。例えば茶抽出物又はカテキンは90重量%~0.001重量%、好ましくは30重量%~0.01重量%であり、はフラバノン若しくはその配糖体は90重量%~0.001重量%、好ましくは20重量%~0.01重量%である。
前記の通り、本発明者は、Eriodictyol が EGCG のもつ抗がん作用、抗肥満作用、抗炎症作用、コレステロール低下作用、抗血栓性作用、免疫増強作用及び抗筋萎縮作用を増強することを明らかにした。
そこで本発明は、柑橘類抽出物又はフラバノン若しくはその配糖体を含む、緑茶抽出物又はカテキンの抗がん作用、抗筋萎縮作用、抗肥満作用、抗炎症作用、コレステロール低下作用、血栓又は脳梗塞予防作用及び免疫増強作用からなる群から選ばれる少なくとも1つの作用の増強剤を提供する。また本発明は、緑茶抽出物又はカテキンと、柑橘類抽出物又はフラバノン若しくはその配糖体とを含む組成物を被検体に摂取させることを特徴とする、当該緑茶抽出物又はカテキンの、前記被検体における抗がん作用、抗筋萎縮作用、抗肥満作用、抗炎症作用、コレステロール低下作用、血栓又は脳梗塞予防作用及び免疫増強作用からなる群から選ばれる少なくとも1つの作用を増強させる方法を提供する(但し、ヒトに対する医療行為を除くことができる)。
柑橘類抽出物又はフラバノン若しくはその配糖体を増強剤又は増強方法として使用する場合も、前記組成物の項で述べた内容と同様に適用することができる。
本発明の増強剤及び増強方法の対象となる被検体は、前記と同様であり、特に限定されるものではないが、ヒトのほか、ヒトを除く哺乳動物、例えば実験動物(マウス、ラット、モルモット、ウサギ等)、家畜(ウシ、ウマ、ブタ、ヤギ等)、愛玩動物(イヌ、ネコ等のペット類)などが挙げられる。
以下、実施例により本発明をさらに具体的に説明する。但し、本発明はこれら実施例に限定されるものではない。
EGCG のがん細胞アポトーシス誘導作用に対するEriodictyolの併用効果
ヒト多発性骨髄腫細胞株U266を、 10% ウシ胎児血清 (FCS) 添加RPMI1640 培地にて 37℃、水蒸気飽和した 5% CO2条件下で継代及び維持した。細胞は対数増殖期で培養維持した。培養に使用した RPMI 1640 培地は、超純水 1 L あたり RPMI 1640 培地 10.4 g、HEPES 2.38 g、注射用ペニシリン G カリウム 10 万単位、硫酸ストレプトマイシン注射用 100 mg 、NaHCO3 2.0 g を懸濁した後、フィルター滅菌した。
その後、FCS を RPMI 1640 培地に添加し、細胞培養に使用した。ヒト多発性骨髄腫細胞株U266に対するEGCG とEriodictyolとの組み合わせによるアポトーシス誘導作用を検討するために、Annexin V 及びPI を用いた二重染色を実施した。Propidium Iodide (PI)染色液は、PI (Sigma)を 50 μg/mL の濃度となるように PBS に懸濁したものを用いた。
5 週齢メスbalb/cマウスを2 週間予備飼育したのち、マウス多発性骨髄腫細胞株MPC-11を5 ×106 cells/mL となるようにRPMI培地に懸濁した細胞懸濁液を、 イソフルラン (マイラン製薬, Tokyo, Japan) 麻酔下で各マウスの右背面部に200μL皮下注射し、移植を行った。移植11 日後、EGCG (15 mg/kg i.p.)及びEriodictyol (15 mg/kg i.p.) を2日に一度投与し、2 日おきに腫瘍体積をノギスで測定した。腫瘍体積は次の式にて算出した。
<腫瘍体積 (mm3) = (短径)2x長径x 0.5>
倫理的観点より、腫瘍体積が 4000mm3を超えたものからイソフルラン (マイラン製薬, Tokyo, Japan) 麻酔下で、心臓採血により屠殺した。
5 週齢メスbalb/cマウスを2 週間予備飼育したのち、マウス多発性骨髄腫細胞株MPC-11を5 ×106 cells/mL となるようにRPMI培地に懸濁した細胞懸濁液を、イソフルラン (マイラン製薬, Tokyo, Japan) 麻酔下で各マウスの右背面部に200μL皮下注射し、移植を行った。移植11 日後、EGCG (15 mg/kg i.p.)及びEriodictyol (15 mg/kg i.p.) を2日に一度投与した。麻酔下で、心臓採血により屠殺を行った。採血した血液は、37℃で2 時間静置し凝固させた後、4℃、2000 x gで15 分間遠心して血清を採取した。得られた血清について、肝毒性の指標である血清中 Aspartate Aminotransferase (AST) 及び Alanine aminotransferase (ALT) 活性を、キット(Wako)を用いて測定した。
12 週齢のオスC57BL/6Jマウスを平均体重が等しくなるように 5 群に群わけし、それぞれ、GR (Ground) 群、TS (Tail suspension) 群、EGCG群、Eriodictyol群、EGCG + Eriodictyol群とした。GR 群および TS 群には群分け開始から生理食塩水を、EGCG群にはEGCGを、Eriodictyol群にはEriodictyolをそれぞれ胃内投与し(5 mg/kg)、EGCG + Eriodictyol群にはEGCGとEriodictyol (5 mg/kg) をゾンデにより胃内投与した。群分け開始から 7日間は通常飼育し、その後TS群、EGCG群、Eriodictyol群、EGCG + Eriodictyol群の4群は尾懸垂試験を施した。尾懸垂試験10日後 (実験開始から17日後)、全マウスをイソフルラン麻酔下で腹部大動脈採血により屠殺し、大腿四頭筋を摘出し、重量を測定した。各サンプルは実験期間中毎日投与した。
12 週齢オス C57BL/6J マウスを1 週間予備飼育したのち、平均体重が等しくなるように 5 群にわけ、Control (AIN-93G準拠食) 群、HF/HS (高脂肪高ショ糖食) 群、やぶきた(0.2% (HF/HS +やぶきた) 群、Eriodictyol (HF/HS + Eriodictyol) 群、やぶきた+Eriodictyol (HF/HS + やぶきた + Eriodictyol) 群とした。やぶきた(0.2%) 及びEriodictyol (0.45 g/kg diet) を添加した飼料を摂食させた。飼料は4 g/day で与え、自由飲水で 8週間飼育した。マウスは、16 時間絶食後、イソフルラン麻酔下で腹部大動脈採血により屠殺した。採血した血液は、37℃で2 時間静置し凝固させた後、4℃、2000 x gで15 分間遠心して血清を採取した。血清中の総コレステロール及び LDL 値を測定した。脂肪組織をトライゾールにて処理し、cDNA合成後real-time PCRによってMCP-1 のmRNA発現量を測定した。
12 週齢オス C57BL/6J マウスを1 週間予備飼育したのち、平均体重が等しくなるように 5 群にわけ、control (AIN-93G準拠食) 群、HF/HS (高脂肪高ショ糖食) 群、やぶきた(0.2% (HF/HS +やぶきた) 群、Eriodictyol (HF/HS + Eriodictyol) 群、やぶきた+ Eriodictyol (HF/HS + やぶきた + Eriodictyol) 群とした。やぶきた(0.2%) 及びEriodictyol (0.45 g/kg diet) を添加した飼料を摂食させた。飼料は 4 g/day で与え、自由飲水で8週間飼育した。マウスは、16時間絶食後、イソフルラン麻酔下で腹部大動脈大動脈採血により屠殺した。肝臓組織をトライゾールにて処理し、cDNA合成後real-time PCRによって3-hydroxy-3-methyl-glutaryl-CoA reductase (HMGCR)、 3-hydroxy-3-methylglutaryl-CoA synthase(HMCGS)、及びlow density lipoprotein receptor (LDLR)のmRNA発現量を測定した。
12 週齢オス C57BL/6J マウスを1 週間予備飼育したのち、平均体重が等しくなるように 4 群にわけ、HF/HS (高脂肪高ショ糖食) 群、やぶきた(0.2% (HF/HS +やぶきた) 群、Eriodictyol (HF/HS + Eriodictyol) 群、やぶきた+ Eriodictyol (HF/HS + やぶきた + Eriodictyol) 群とした。やぶきた(0.2%) 及びEriodictyol (0.45 g/kg diet) を添加した飼料を摂食させた。飼料は 4 g/day で与え、自由飲水で8週間飼育した。マウスは、16 時間絶食後、イソフルラン麻酔下で腹部大動脈採血により屠殺した。採血した血液は、37℃で2時間静置し凝固させた後、4℃、2000 x gで15 分間遠心して血清を採取した。血清中の抗血栓性因子である tissue factor pathway inhibitor (TFPI) 量をELISA法により測定した。
12 週齢オス C57BL/6J マウスを1 週間予備飼育したのち、平均体重が等しくなるように 4 群にわけ、HF/HS (高脂肪高ショ糖食) 群、やぶきた(0.2% (HF/HS +やぶきた) 群、Eriodictyol (HF/HS + Eriodictyol) 群、やぶきた+ Eriodictyol (HF/HS + やぶきた + Eriodictyol) 群とした。やぶきた(0.2%) 及びEriodictyol (0.45 g/kg diet) を添加した飼料を摂食させた。飼料は 4 g/day で与え、自由飲水で8週間飼育した。マウスは、16 時間絶食後、イソフルラン麻酔下で腹部大動脈採血により屠殺した。採血した血液は、37℃で2 時間静置し凝固させた後、4℃、2000 x gで15 分間遠心して血清を採取した。血清中のIgA量を ELISA法により測定した。
ヒト多発性骨髄腫細胞株U266は 、10% FCS 添加RPMI1640 培地にて 37℃、水蒸気飽和した 5% CO2条件下で継代、維持した。細胞は対数増殖期で培養維持した。培養に使用した RPMI 1640 培地は、超純水 1 L あたり RPMI 1640 培地 10.4 g、HEPES 2.38 g、注射用ペニシリン G カリウム 10 万単位、硫酸ストレプトマイシン注射用 100 mg、NaHCO3 2.0 g を懸濁した後、フィルター滅菌した。
実験に用いたレモン皮抽出物はレモン6 個 からおろし金を用いて果皮 100 g を採取し100% EtOH 100 mL を加え、乳鉢にて破砕した。さらにガーゼにて繊維の除去を行い、1号の濾紙および漏斗を用い、自然ろ過にて沈殿物を除去した。その後12000 x gにて遠心分離を行い、上清を回収した。得られたレモンエタノール抽出液をエバポレーターを用いて溶媒を揮発させ、レモンエタノール抽出画分を得た。このレモンエタノール抽出画分をDMSO に再溶解し、レモン抽出物とした。その後、U266 を1% FCS SOD (5 U/mL)、Catalase (200 U/mL)含有RPMI 1640 に 5 ×104cells/mLになるよう調整して 96 well plate に播種し、EGCG、EGCG3”Me、緑茶抽出物のがん細胞致死誘導活性に対するEriodictyol、Eriodictyol関連物質(Naringenin, Hesperetin) 及びEriodictyol含有食品を添加し96 時間培養した。培養後、トリパンブルー法にて生細胞数を測定した。
ヒト多発性骨髄腫細胞株U266は、10% FCS 添加RPMI1640 培地にて 37℃、水蒸気飽和した 5% CO2条件下で継代、維持した。細胞は対数増殖期で培養維持した。培養に使用した RPMI 1640 培地は、超純水 1 L あたり RPMI 1640 培地 10.4 g、HEPES 2.38 g、注射用ペニシリン G カリウム 10 万単位、硫酸ストレプトマイシン注射用 100 mg、NaHCO3 2.0 g を懸濁した後、フィルター滅菌した。U266 を1% FCS SOD (5 U/mL)、Catalase (200 U/mL)含有RPMI 1640 に 5 ×104cells/mLになるよう調整して 96 well plate に播種し、直ちに、終濃度が 20 μg/mL となるように Anti-67LR Monoclonal Antibody であるMLuc5 (abcam) を添加した。3 時間後、Eriodictyol及び EGCGを終濃度が 5 μM となるよう添加した。生細胞数はATPlite One Step (パーキンエルマー) にて測定した。
5 週齢メスbalb/cマウスを2 週間予備飼育したのち、マウス多発性骨髄腫細胞株MPC-11を5 ×106 cells/mL となるようにRPMI培地に懸濁した細胞懸濁液を、 200 μL 右背部に皮下注射移植した。移植11 日後、EGCG (15 mg/kg i.p.)及びEriodictyol (15 mg/kg i.p.) を投与し、6時間後に屠殺を実施し、腫瘍を摘出した。移植11 日後、 EGCG (15 mg/kg i.p.) 及び Eriodictyol (15 mg/kg i.p.) を投与した。6 時間後屠殺した。腫瘍を摘出し、ライゼートにした後、回収したサンプル(1 mg/mL protein lyste 20 μL) に Kinase Assay buffer 20 μL、Biotinylated Akt Substrate WS 10 μL、dH2O 50 μL、ATP/MgCl2Mix 20μL を順に添加し、37℃ にて 45分間インキュベートした後、Kinase Stop Solution を 10 μL 添加した。その後、Streptavidin-Coated 96-Well に 80 μL ずつ添加し、30℃ にて 60分間放置した。その後プレートを三度洗浄し、Phosphoserine Detection Antibody を 100 μL ずつ添加し、30℃にて60分間放置した。その後プレートを三度洗浄し、HRP-Antibody Conjugateを 100 μL ずつ添加し、30℃にて60分間放置した。その後プレートを三度洗浄した後、基質である TMB solution を 100μL ずつ添加した。30℃にて20分間放置後に停止液を100 μL ずつ添加した後、450 nm のプレートリーダーにて吸光度を測定した。
5 週齢メスbalb/cマウスを2 週間予備飼育したのち、マウス多発性骨髄腫細胞株MPC-11を5 ×106 cells/mL となるようにRPMI培地に懸濁した細胞懸濁液を、 200 μL 右背部に皮下注射移植した。移植11 日後、EGCG (15 mg/kg i.p.)及びEriodictyol (15 mg/kg i.p.) を投与し、6時間後に屠殺した。腫瘍を摘出し、ライゼートにした後、遠心した。上清を PBS にて 2 mg protein/ mL となるようにしたのち、エッペンドルフチューブに 20 μL 分注し、基質混合液 (BODIPY-C12-SM 2 μL 、10%Triton 10 μL、1M sodium acetate pH 4.5 20 μL dH2O 78 μL) を 8 μL 添加し、タッピングにて混合したのちフラッシュし、 37℃にて8時間インキュベートした。さらに、停止液 (クロロホルム CHCl3 :MeOH = 2:1) を 60 μL 添加し、あらかじめ乾燥器にて活性化させた 薄層クロマトグラフィー(TLC)プレートに 10 μLづつスポットし、展開溶媒(dH2O:MeOH:クロロホルム CHCl3 = 8:35:60 ) にて展開した。 TLC 法にて酸性スフィンゴミエリナーゼ活性を測定した (n = 5 S.E.M.)。
5 週齢メスbalb/cマウスを2 週間予備飼育したのち、マウス多発性骨髄腫細胞株MPC-11を5 ×106 cells/mL となるようにRPMI培地に懸濁した細胞懸濁液を、 200 μL 右背部に皮下注射移植した。移植11 日後、EGCG (15 mg/kg i.p.)及びEriodictyol (15 mg/kg i.p.) を2日に一度投与し、6 時間後に屠殺した。腫瘍を摘出し、組織切片を作成し、免疫組織染色にてCaspase-3 が活性化された細胞数を測定した。
実験結果の統計処理には Tukey’s testを用い、0.05 未満を有意とした。
EGCG のがん細胞アポトーシス誘導作用に対するEriodictyolの併用効果(図1)
EGCGのがん細胞アポトーシス誘導作用に対するEriodictyol の効果を評価するため、ヒト多発性骨髄腫細胞株U266 を5×104cells/mL となるよう調整して 96 well plate に播種し、EGCG 及びEriodictyolを終濃度が5 μM となるよう添加し96 時間培養した。96時間培養後、Annexin V Alexa Fluor 488 Conjugate を 5 μL (Invitrogen) 添加した。PI 染色液2 μL を添加し、室温にて15分間放置した。その後、Annexin V Binding Buffer 400 μL を添加し、フローサイトメーターにてアポトーシスが誘導された細胞数を測定した。
その結果、Eriodictyol は EGCG のアポトーシス誘導作用を増強させることが明らかとなった。
腫瘍移植マウスに対するEGCG と Eriodictyol併用の抗がん作用(図2)
EGCG とEriodictyol 組み合わせによる抗がん作用を評価するため、Balb/cマウスを2 週間予備飼育したのち、マウス多発性骨髄腫細胞株MPC-11を5 ×106 cells/mL となるようにRPMI培地に懸濁した細胞懸濁液を右背部に皮下注射した。腫瘍生着を確認後、EGCG (15 mg/kg i.p.) 及びEriodictyol (15 mg/kg i.p.)を2日に一度投与し、腫瘍の体積を測定した。その結果、Eriodictyol とEGCGの 併用は腫瘍成長を顕著に阻害するとともに生存期間を有意に延長させることを明らかにした。
腫瘍移植マウスに対するEGCG と Eriodictyol 組み合わせによる肝毒性(図3)
マウス多発性骨髄腫細胞株MPC-11を移植したマウスにEGCG (15 mg/kg i.p.) 及びEriodictyol (15 mg/kg i.p.)を2日に一度投与した。屠殺時のマウス血清中のAspartate Aminotransferase (AST) 及び Alanine aminotransferase (ALT) 活性を測定した。
その結果、EGCG とEriodictyol の組み合わせは AST 及び ALT の上昇を誘導しなかったことから、肝毒性を示さないことを明らかにした。
廃用性筋萎縮に及ぼすEGCGとEriodictyol併用物の効果(図4)
尾懸垂試験誘導性マウスの廃用性筋萎縮に及ぼすEGCGならびにEriodictyolの作用について検討した。C57BL/6J マウスに水又は各サンプルをゾンデにより1日に1回 胃内投与した。投与開始から7 日後、尾懸垂試験を開始し、尾懸垂試験開始から10 日後、イソフルラン麻酔下で腹部大動脈採血によりマウスを屠殺し、大腿四頭筋を摘出し重量を測定した。
その結果、EGCGおよびEriodictyolはそれぞれ単独では筋萎縮に対して効果を示さなかったのに対し、EGCGとEriodictyolを併用投与したマウスでは筋萎縮が抑制されていた。以上の結果から、EGCGとEriodictyolの併用は筋萎縮抑制作用を示すことが明らかになった。
高脂肪高ショ糖(HF/HS)食摂取マウスに対する緑茶抽出物とEriodictyolの併用摂取効果(図5)
高脂肪高ショ糖食摂食肥満モデルマウスにおけるやぶきた及びEriodictyolの肥満に対する作用において検討を行った。12 週齢オス C57BL/6J マウスを1 週間予備飼育したのち、平均体重が等しくなるように各群に分け、飼料を 4 g/day で与え自由飲水で8週間飼育した。体重を測定後16時間絶食させ、その後、イソフルラン麻酔下で腹部大動脈採血により屠殺した。採血により採取した血液は37℃で2時間静置し凝固させた後、4℃、2000 x gで15分間遠心して血清を採取した。血清中の総コレステロール及び LDL 値を測定した。脂肪組織をトライゾールにて処理し、cDNA合成後real-time PCRによって MCP-1 のmRNA発現量を測定した。
その結果、高脂肪高ショ糖食摂取により上昇した体重、脂肪組織MCP-1発現量、LDL値、血清コレステロール値に対してやぶきた及びEriodictyol 単独群では効果が見られなかったが、やぶきたとEriodictyol の併用群ではこれら全ての値に対して上昇抑制効果が観察された。
高脂肪高ショ糖(HF/HS)食摂取マウスの肝臓におけるコレステロール代謝関連遺伝子発現に対する緑茶抽出物とEriodictyolの併用摂取効果(図6)
高脂肪高ショ糖食摂食肥満モデルマウスにおける、やぶきた及びEriodictyolの肝臓におけるコレステロール代謝関連遺伝子発現に対する作用について検討した。C57BL/6J マウスを 1 週間予備飼育したのち、平均体重が等しくなるように各群に分け、飼料を4 g/day で与え自由飲水で 8週間飼育した。16時間絶食後、イソフルラン麻酔下で腹部大動脈採血により屠殺した。肝臓組織をトライゾールにて処理し、cDNA合成後real-time PCRによって HMGCR、HMCGS及び LDLRのmRNA発現量を測定した。
その結果、やぶきた及びEriodictyol 単独群では効果が観察されなかったのに対し、やぶきたとEriodictyol の併用群において肝臓におけるHMGCR及び HMCGSの発現量の低下が見られた。また、肝臓におけるLDLRの発現量が上昇していた。
抗血栓性因子産生に対する緑茶抽出物とEriodictyolの併用摂取効果(図7)
マウスにおけるやぶきた及びEriodictyolの抗血栓性因子産生に対する作用について検討した。12 週齢オス C57BL/6J マウスを1 週間予備飼育したのち、平均体重が等しくなるように各群に分け、飼料を 4 g/day で与え自由飲水で8週間飼育した。16時間絶食後、イソフルラン麻酔下で腹部大動脈採血により屠殺した。採血により採取した血液は37℃で2 時間静置し凝固させた後、4℃、2000 x gで15 分間遠心して血清を採取した。血清中の抗血栓性因子であるTFPI 量をELISA法にて測定した。
その結果、やぶきた単独群では作用を与えなかったのに対し、やぶきたとEriodictyol の併用群においてTFPI 量の発現量の上昇が見られた。
血清IgA量に対する緑茶抽出物とEriodictyolの併用摂取効果(図8)
マウスにおけるやぶきた及びEriodictyolの血清IgA量に対する作用について検討した。12 週齢オス C57BL/6J マウスを1 週間予備飼育したのち、平均体重が等しくなるように各群に分け、飼料を 4 g/day で与え自由飲水で8週間飼育した。16時間絶食後、イソフルラン麻酔下で腹部大動脈採血により屠殺した。採血により採取した血液は37℃で2 時間静置し凝固させた後、4℃、2000 x gで15 分間遠心して血清を採取した。血清中のIgA量を ELISA法にて測定した。
その結果、やぶきた単独群では作用を与えなかったのに対し、やぶきたとEriodictyol の併用群においてIgA量の上昇が見られた。
EGCG、EGCG3”Me、緑茶抽出物のがん細胞致死誘導活性に対するEriodictyol、Eriodictyol関連物質(Naringenin, Hesperetin) ならびにEriodictyol含有食品抽出物の組み合わせ効果(図9)
EGCG若しくはその構造類似体、又はEGCG を含有する天然物とEriodictyol若しくはその構造類似体、又はEriodictyol を含有する天然物との併用効果を評価するため、ヒト多発性骨髄腫細胞株U266 を5×104cells/mL となるよう調整して 96 well plate に播種し、EGCG 及びEriodictyolを終濃度で 5 μM となるよう添加し、96時間培養した。96 時間培養後、トリパンブルー法にて生細胞数を測定した。
その結果、Eriodictyol又はその構造類似体であるNaringenin若しくはHesperetin、及びEriodictyol を含有するレモン抽出物はEGCG、EGCG”Me、緑茶抽出物の抗がん作用を顕著に高めることを見出した。
EriodictyolによるEGCG活性増強の67LR 依存性(図10)
EriodictyolによるEGCG活性増強の67LR 依存性を検討するために U266 細胞を5 ×104 cells/mLになるよう調整して 96 well plate に播種し、終濃度が 20 μg/mL となるように抗67LR抗体を添加した。3 時間後、Eriodictyol及び EGCGを終濃度が 5 μM となるよう培地に添加した。培養96時間後の生細胞数をATPlite One Step (パーキンエルマー) にて測定した。
その結果、EGCGとEriodictyolとの併用による抗がん作用は抗67LR抗体の前処理により消失した。このことから、EGCGの生理活性に対するEriodictyolの増強作用は67LR に依存することが示された。
EGCG のAkt活性化能に対するEriodictyol の増強効果(図11)
EGCG の 67LR 依存的がん細胞致死誘導活性を担うAktの活性化に対する Eriodictyol の作用を検討するため、Balb/cマウスにマウス多発性骨髄腫細胞株MPC-11を皮下注射移植した。移植11 日後、EGCG (15 mg/kg i.p.)及びEriodictyol (15 mg/kg i.p.) を投与した6 時間後に屠殺し、摘出した腫瘍におけるAkt 活性を測定した。
その結果、Eriodictyol 及びEGCG 併用はAkt 活性を顕著に上昇させることを見出した。このことから、in vivo においてEriodictyolはEGCGによる67LRシグナリングの活性化を増強することが明らかとなった。
EGCG の67LR依存的がん細胞致死誘導経路の活性化 (酸性スフィンゴミエリナーゼ活性化)に対するEriodictyol の増強効果(図12)
EGCG の 67LR 依存的がん細胞致死誘導活性を担う酸性スフィンゴミエリナーゼの活性化に対する Eriodictyol の作用を検討するため、Balb/cマウスにマウス多発性骨髄腫細胞株MPC-11を皮下注射移植した。移植11 日後、EGCG (15 mg/kg i.p.)及びEriodictyol (15 mg/kg i.p.) を投与した6 時間後に屠殺し、摘出した腫瘍における酸性スフィンゴミエリナーゼ活性を測定した。
その結果、Eriodictyol及びEGCG の併用は酸性スフィンゴミエリナーゼ活性を顕著に上昇させることを明らかにした。以上のことから、in vivo においてEriodictyolはEGCGによる67LRシグナリングの活性化を増強することが明らかとなった。
EGCG の 67LR 依存的がん細胞致死活性 (Caspase-3 活性)に対するEriodictyol の増強効果(図13)
EGCG の 67LR 依存的がん細胞致死誘導機構活性の指標となるCaspase-3 活性化に対する Eriodictyol の作用を検討するため、5 週齢メスbalb/cマウスにマウス多発性骨髄腫細胞株MPC-11を皮下注射移植した。移植11 日後、EGCG (15 mg/kg i.p.)及びEriodictyol (15 mg/kg i.p.) を投与した6時間後に屠殺し、摘出した腫瘍の組織切片を作成し、Caspase-3 の活性化状態を評価した。
その結果、EriodictyolはEGCGのCaspase-3活性化能を顕著に増強することを明らかにした。
EGCG及びその類似体の抗がん作用に対するEriodictyol及びその類似体の併用効果
ヒト多発性骨髄腫細胞株U266は、 10% ウシ胎児血清 (FCS) 添加RPMI1640 培地にて 37℃、水蒸気飽和した 5% CO2 条件下で継代、維持した。細胞は対数増殖期で培養維持した。培養に使用した RPMI 1640 培地は、超純水 1 L あたり RPMI 1640 培地 10.4 g、HEPES 2.38 g、注射用ペニシリン G カリウム 10 万単位、硫酸ストレプトマイシン注射用 100 mg、NaHCO3 2.0 g を懸濁した後、フィルター滅菌した。その後、FCS を RPMI 1640 培地に添加し、細胞培養に使用した。超純水 1 L に対し、NaCl 8.0 g、KCl 0.2 g、Na2HPO4 1.15 g、KH2PO4 0.2 g を溶解してPBSを調製し、オートクレーブ滅菌した。
Eriodictyol及びその構造類似体であるNaringenin、Hesperetin、ならびにそれらの配糖体であるEriocitrin、Naringin、Hesperidinは、100% ジメチルスルホキシド (DMSO) にて 5 mM となるように調整し、-30℃ にて保存した。EGCG 及び (-)-Gallocatechin gallate (GCG) は超純水にて 5 mM となるように調整し、-30℃ にて保存した。EGCG3”Meは10%DMSO dH2Oにて 5 mM となるように調整し、-30℃ にて保存した。
U266 を1% FCS及び SOD (5 U/mL)、Catalase (200 U/mL)含有RPMI 1640 に 5×104 cells/mL になるよう調整して 24 well plate に播種し、EGCG 及び類似体又は Eriodictyol及びその類似体を、終濃度で 5 mM となるよう添加し96 時間培養した。培養後、トリパンブルー法にて生細胞数を測定した。
実験結果の統計処理には Student‘s testを用い、Vehicle 群の Control と比較してP値が 0.05 未満を有意とした。
Eriodictyol が EGCG 及びその構造類似体の抗がん作用に及ぼす影響
EGCG 及びその構造類似体の抗がん作用に対するEriodictyol の効果を評価するため、ヒト多発性骨髄腫細胞株U266 を5×104cells/mL となるよう調整して 24 well plate に播種し、Eriodictyol及びその構造類似体を終濃度が 5 mM となるよう添加し96時間培養した。96 時間培養後、トリパンブルー法にて生細胞数を測定した。
その結果、EriodictyolはEGCG 及びその構造類似体であるEGCG 3”Me, GCG(ガロカテキンガレート)の抗がん作用を顕著に高めることを見出した (図14)。
Naringenin が EGCG 及びその構造類似体の抗がん作用に及ぼす影響
EGCG 及びその構造類似体の抗がん作用に対するNaringenin の効果を評価するため、ヒト多発性骨髄腫細胞株U266 を5×104cells/mL となるよう調整して 24 well plate に播種し、Naringenin及びその構造類似体を終濃度が 5 mM となるよう添加し96時間培養した。96 時間培養後、トリパンブルー法にて生細胞数を測定した。
その結果、NaringeninはEGCG 及びその構造類似体であるEGCG 3”Me, GCGの抗がん作用を顕著に高めることを見出した(図15)。
Hesperetinが EGCG 及びその構造類似体の抗がん作用に及ぼす影響
EGCG 及びその構造類似体の抗がん作用に対するHesperetinの効果を評価するため、ヒト多発性骨髄腫細胞株U266 を5×104cells/mL となるよう調整して 24 well plate に播種し、Hesperetin及びその構造類似体を終濃度が 5 mM となるよう添加し96時間培養した。96 時間培養後、トリパンブルー法にて生細胞数を測定した。
その結果、HesperetinはEGCG 及びその構造類似体であるEGCG 3”Me, GCGの抗がん作用を顕著に高めることを見出した(図16)。
Eriodictyol 配糖体であるEriocitrin が EGCG 及びその構造類似体の抗がん作用に及ぼす影響
EGCG 及びその構造類似体の抗がん作用に対するEriocitrin の効果を評価するため、ヒト多発性骨髄腫細胞株U266 を5×104cells/mL となるよう調整して 24 well plate に播種し、Eriocitrin及びその構造類似体を終濃度が 5 mM となるよう添加し96 時間培養した。96 時間培養後、トリパンブルー法にて生細胞数を測定した。
その結果、EriocitrinはEGCG 及びその構造類似体であるEGCG 3”Me, GCGの抗がん作用を顕著に高めることを見出した(図17)。
Naringenin 配糖体であるNaringin が EGCG 及びその構造類似体の抗がん作用に及ぼす影響
EGCG 及びその構造類似体の抗がん作用に対するNaringin の効果を評価するため、ヒト多発性骨髄腫細胞株U266 を5×104cells/mL となるよう調整して 24 well plate に播種し、Naringin及びその構造類似体を終濃度が 5 mM となるよう添加し96 時間培養した。96 時間培養後、トリパンブルー法にて生細胞数を測定した。
その結果、NaringinはEGCG の抗がん作用を顕著に高めることを見出した(図18)。
Hesperetin配糖体であるHesperidin が EGCG 及びその構造類似体の抗がん作用に及ぼす影響
EGCG 及びその構造類似体の抗がん作用に対するHesperidin の効果を評価するため、ヒト多発性骨髄腫細胞株U266 を5×104cells/mL となるよう調整して 24 well plate に播種し、Hesperidin及びその構造類似体を終濃度が 5 mM となるよう添加し96時間培養した。96 時間培養後、トリパンブルー法にて生細胞数を測定した。
その結果、HesperidinはEGCG 及びその構造類似体であるEGCG 3”Me, GCGの抗がん作用を顕著に高めることを見出した(図19)。
Claims (22)
- 緑茶抽出物又はカテキンと、柑橘類抽出物又はフラバノン若しくはその配糖体とを含む、組成物。
- 緑茶抽出物又はカテキンが、エピカテキン、エピガロカテキン、エピカテキンガレート、ガロカテキンガレート、エピガロカテキンガレート及びメチル化カテキンからなる群から選ばれる少なくとも1種である請求項1に記載の組成物。
- 柑橘類抽出物又はフラバノン若しくはその配糖体が、エリオジクチオール、ナリンゲニン及びヘスペレチン、並びにこれらの配糖体からなる群から選ばれる少なくとも1種である請求項1に記載の組成物。
- 緑茶抽出物又はカテキンがガロカテキンガレート、エピガロカテキンガレート又はメチル化カテキンであり、柑橘類抽出物又はフラバノンがエリオジクチオールである請求項1に記載の組成物。
- 抗がん作用、抗筋萎縮作用、抗肥満作用、抗炎症作用、コレステロール低下作用、血栓又は脳梗塞予防作用及び免疫増強作用からなる群から選ばれる少なくとも1つの作用を有する、請求項1~4のいずれか1項に記載の組成物。
- 緑茶抽出物又はカテキンと、柑橘類抽出物又はフラバノン若しくはフラバノン配糖体とを含む、機能性食品。
- 緑茶抽出物又はカテキンが、エピカテキン、エピガロカテキン、エピカテキンガレート、ガロカテキンガレート、エピガロカテキンガレート及びメチル化カテキンからなる群から選ばれる少なくとも1種である請求項6に記載の食品。
- 柑橘類抽出物又はフラバノン若しくはその配糖体が、エリオジクチオール、ナリンゲニン及びヘスペレチン、並びにこれらの配糖体からなる群から選ばれる少なくとも1種である請求項6に記載の食品。
- 緑茶抽出物又はカテキンがガロカテキンガレート、エピガロカテキンガレート又はメチル化カテキンであり、柑橘類抽出物又はフラバノンがエリオジクチオールである請求項6に記載の食品。
- 抗がん作用、抗筋萎縮作用、抗肥満作用、抗炎症作用及びコレステロール低下作用、血栓又は脳梗塞予防作用及び免疫増強作用からなる群から選ばれる少なくとも1つの作用を有する、請求項6~9のいずれか1項に記載の食品。
- 緑茶抽出物又はカテキンと、柑橘類抽出物又はフラバノン若しくはその配糖体とを含む、抗がん剤、抗筋萎縮剤、抗肥満剤、抗炎症剤、コレステロール低下剤、血栓又は脳梗塞予防剤及び免疫増強剤からなる群から選ばれるいずれかの剤。
- 緑茶抽出物又はカテキンが、エピカテキン、エピガロカテキン、エピカテキンガレート、ガロカテキンガレート、エピガロカテキンガレート及びメチル化カテキンからなる群から選ばれる少なくとも1種である請求項11に記載の剤。
- 柑橘類抽出物又はフラバノン若しくはその配糖体が、エリオジクチオール、ナリンゲニン及びヘスペレチン、並びにこれらの配糖体からなる群から選ばれる少なくとも1種である請求項11に記載の剤。
- 緑茶抽出物又はカテキンがガロカテキンガレート、エピガロカテキンガレート又はメチル化カテキンであり、柑橘類抽出物又はフラバノンがエリオジクチオールである請求項11に記載の剤。
- 柑橘類抽出物又はフラバノン若しくはその配糖体を含む、緑茶抽出物又はカテキンの抗がん作用、抗筋萎縮作用、抗肥満作用、抗炎症作用、コレステロール低下作用、血栓又は脳梗塞予防作用及び免疫増強作用からなる群から選ばれる少なくとも1つの作用の増強剤。
- 緑茶抽出物又はカテキンが、エピカテキン、エピガロカテキン、エピカテキンガレート、ガロカテキンガレート、エピガロカテキンガレート及びメチル化カテキンからなる群から選ばれる少なくとも1種である請求項15に記載の増強剤。
- 柑橘類抽出物又はフラバノン若しくはその配糖体が、エリオジクチオール、ナリンゲニン及びヘスペレチン、並びにこれらの配糖体からなる群から選ばれる少なくとも1種である請求項15に記載の増強剤。
- 緑茶抽出物又はカテキンがガロカテキンガレート、エピガロカテキンガレート又はメチル化カテキンであり、柑橘類抽出物又はフラバノンがエリオジクチオールである請求項15に記載の増強剤。
- 緑茶抽出物又はカテキンと、柑橘類抽出物又はフラバノン若しくはその配糖体とを含む組成物を被検体に摂取させることを特徴とする、当該緑茶抽出物又はカテキンの、前記被検体における抗がん作用、抗筋萎縮作用、抗肥満作用、抗炎症作用、コレステロール低下作用、血栓又は脳梗塞予防作用及び免疫増強作用からなる群から選ばれる少なくとも1つの作用を増強させる方法(ヒトに対する医療行為を除く)。
- 緑茶抽出物又はカテキンが、エピカテキン、エピガロカテキン、エピカテキンガレート、ガロカテキンガレート、エピガロカテキンガレート及びメチル化カテキンからなる群から選ばれる少なくとも1種である請求項19に記載の方法。
- 柑橘類抽出物又はフラバノン若しくはその配糖体が、エリオジクチオール、ナリンゲニン及びヘスペレチン、並びにこれらの配糖体からなる群から選ばれる少なくとも1種である請求項19に記載の方法。
- 緑茶抽出物又はカテキンがガロカテキンガレート、エピガロカテキンガレート又はメチル化カテキンであり、柑橘類抽出物又はフラバノンがエリオジクチオールである請求項19に記載の方法。
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US20170156361A1 (en) | 2017-06-08 |
JPWO2015199169A1 (ja) | 2017-05-25 |
JP6912763B2 (ja) | 2021-08-04 |
US10251408B2 (en) | 2019-04-09 |
JP2020121990A (ja) | 2020-08-13 |
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