WO2015053280A1 - カルボキシメチル基含有修飾ヒアルロン酸および/またはその塩および/またはその製造方法 - Google Patents
カルボキシメチル基含有修飾ヒアルロン酸および/またはその塩および/またはその製造方法 Download PDFInfo
- Publication number
- WO2015053280A1 WO2015053280A1 PCT/JP2014/076846 JP2014076846W WO2015053280A1 WO 2015053280 A1 WO2015053280 A1 WO 2015053280A1 JP 2014076846 W JP2014076846 W JP 2014076846W WO 2015053280 A1 WO2015053280 A1 WO 2015053280A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- hyaluronic acid
- salt
- modified hyaluronic
- carboxymethyl group
- containing modified
- Prior art date
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- KIUKXJAPPMFGSW-DNGZLQJQSA-N (2S,3S,4S,5R,6R)-6-[(2S,3R,4R,5S,6R)-3-Acetamido-2-[(2S,3S,4R,5R,6R)-6-[(2R,3R,4R,5S,6R)-3-acetamido-2,5-dihydroxy-6-(hydroxymethyl)oxan-4-yl]oxy-2-carboxy-4,5-dihydroxyoxan-3-yl]oxy-5-hydroxy-6-(hydroxymethyl)oxan-4-yl]oxy-3,4,5-trihydroxyoxane-2-carboxylic acid Chemical class CC(=O)N[C@H]1[C@H](O)O[C@H](CO)[C@@H](O)[C@@H]1O[C@H]1[C@H](O)[C@@H](O)[C@H](O[C@H]2[C@@H]([C@@H](O[C@H]3[C@@H]([C@@H](O)[C@H](O)[C@H](O3)C(O)=O)O)[C@H](O)[C@@H](CO)O2)NC(C)=O)[C@@H](C(O)=O)O1 KIUKXJAPPMFGSW-DNGZLQJQSA-N 0.000 title claims abstract description 340
- 150000003839 salts Chemical class 0.000 title claims abstract description 159
- 125000002057 carboxymethyl group Chemical group [H]OC(=O)C([H])([H])[*] 0.000 title claims abstract description 141
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 47
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- 238000006243 chemical reaction Methods 0.000 claims description 55
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- 239000008194 pharmaceutical composition Substances 0.000 claims description 10
- WBJINCZRORDGAQ-UHFFFAOYSA-N ethyl formate Chemical compound CCOC=O WBJINCZRORDGAQ-UHFFFAOYSA-N 0.000 claims description 6
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- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 1
- FGMPLJWBKKVCDB-UHFFFAOYSA-N trans-L-hydroxy-proline Natural products ON1CCCC1C(O)=O FGMPLJWBKKVCDB-UHFFFAOYSA-N 0.000 description 1
- 229940093609 tricaprylin Drugs 0.000 description 1
- UFTFJSFQGQCHQW-UHFFFAOYSA-N triformin Chemical compound O=COCC(OC=O)COC=O UFTFJSFQGQCHQW-UHFFFAOYSA-N 0.000 description 1
- VLPFTAMPNXLGLX-UHFFFAOYSA-N trioctanoin Chemical compound CCCCCCCC(=O)OCC(OC(=O)CCCCCCC)COC(=O)CCCCCCC VLPFTAMPNXLGLX-UHFFFAOYSA-N 0.000 description 1
- BSVBQGMMJUBVOD-UHFFFAOYSA-N trisodium borate Chemical compound [Na+].[Na+].[Na+].[O-]B([O-])[O-] BSVBQGMMJUBVOD-UHFFFAOYSA-N 0.000 description 1
- 210000003954 umbilical cord Anatomy 0.000 description 1
- 229940088594 vitamin Drugs 0.000 description 1
- 229930003231 vitamin Natural products 0.000 description 1
- 235000013343 vitamin Nutrition 0.000 description 1
- 239000011782 vitamin Substances 0.000 description 1
- 235000019163 vitamin B12 Nutrition 0.000 description 1
- 239000011715 vitamin B12 Substances 0.000 description 1
- 235000019164 vitamin B2 Nutrition 0.000 description 1
- 239000011716 vitamin B2 Substances 0.000 description 1
- 235000019154 vitamin C Nutrition 0.000 description 1
- 239000011718 vitamin C Substances 0.000 description 1
- 235000019165 vitamin E Nutrition 0.000 description 1
- 239000011709 vitamin E Substances 0.000 description 1
- 229940046009 vitamin E Drugs 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
- 150000003751 zinc Chemical class 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- OWVLYQRCCIEOPF-QHTZZOMLSA-L zinc;(2s)-5-oxopyrrolidine-2-carboxylate Chemical compound [Zn+2].[O-]C(=O)[C@@H]1CCC(=O)N1.[O-]C(=O)[C@@H]1CCC(=O)N1 OWVLYQRCCIEOPF-QHTZZOMLSA-L 0.000 description 1
- UHVMMEOXYDMDKI-JKYCWFKZSA-L zinc;1-(5-cyanopyridin-2-yl)-3-[(1s,2s)-2-(6-fluoro-2-hydroxy-3-propanoylphenyl)cyclopropyl]urea;diacetate Chemical compound [Zn+2].CC([O-])=O.CC([O-])=O.CCC(=O)C1=CC=C(F)C([C@H]2[C@H](C2)NC(=O)NC=2N=CC(=CC=2)C#N)=C1O UHVMMEOXYDMDKI-JKYCWFKZSA-L 0.000 description 1
Images
Classifications
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
- C08B37/00—Preparation of polysaccharides not provided for in groups C08B1/00 - C08B35/00; Derivatives thereof
- C08B37/006—Heteroglycans, i.e. polysaccharides having more than one sugar residue in the main chain in either alternating or less regular sequence; Gellans; Succinoglycans; Arabinogalactans; Tragacanth or gum tragacanth or traganth from Astragalus; Gum Karaya from Sterculia urens; Gum Ghatti from Anogeissus latifolia; Derivatives thereof
- C08B37/0063—Glycosaminoglycans or mucopolysaccharides, e.g. keratan sulfate; Derivatives thereof, e.g. fucoidan
- C08B37/0072—Hyaluronic acid, i.e. HA or hyaluronan; Derivatives thereof, e.g. crosslinked hyaluronic acid (hylan) or hyaluronates
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- A—HUMAN NECESSITIES
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- 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
- A23L29/00—Foods or foodstuffs containing additives; Preparation or treatment thereof
- A23L29/30—Foods or foodstuffs containing additives; Preparation or treatment thereof containing carbohydrate syrups; containing sugars; containing sugar alcohols, e.g. xylitol; containing starch hydrolysates, e.g. dextrin
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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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- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K47/00—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient
- A61K47/30—Macromolecular organic or inorganic compounds, e.g. inorganic polyphosphates
- A61K47/36—Polysaccharides; Derivatives thereof, e.g. gums, starch, alginate, dextrin, hyaluronic acid, chitosan, inulin, agar or pectin
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- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K8/00—Cosmetics or similar toiletry preparations
- A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
- A61K8/72—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds
- A61K8/73—Polysaccharides
- A61K8/735—Mucopolysaccharides, e.g. hyaluronic acid; Derivatives thereof
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- A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
- A61Q17/00—Barrier preparations; Preparations brought into direct contact with the skin for affording protection against external influences, e.g. sunlight, X-rays or other harmful rays, corrosive materials, bacteria or insect stings
- A61Q17/04—Topical preparations for affording protection against sunlight or other radiation; Topical sun tanning preparations
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- A61Q19/10—Washing or bathing preparations
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- A61Q5/00—Preparations for care of the hair
- A61Q5/12—Preparations containing hair conditioners
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L5/00—Compositions of polysaccharides or of their derivatives not provided for in groups C08L1/00 or C08L3/00
- C08L5/08—Chitin; Chondroitin sulfate; Hyaluronic acid; Derivatives thereof
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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
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
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- A61Q19/001—Preparations for care of the lips
Definitions
- the present invention relates to a carboxymethyl group-containing modified hyaluronic acid and / or a salt thereof and / or a production method thereof, and a cosmetic, a food composition and a pharmaceutical composition containing the same.
- water-soluble polysaccharides such as hyaluronic acid contain a hydroxyl group or a carboxyl group, and many have high viscosity due to hydrogen bonds formed between these groups (Japanese Patent Laid-Open No. Sho 63-63). 57602).
- the high viscosity of the water-soluble polysaccharide may cause poor touch in external medicines and cosmetics, and may cause poor texture in oral medicines and foods. For this reason, a water-soluble polysaccharide having water retention, low stickiness and excellent texture is required.
- the present invention provides a method for producing a carboxymethyl group-containing modified hyaluronic acid and / or a salt thereof, which can easily obtain a carboxymethyl group-containing modified hyaluronic acid having a high whiteness and a high carboxymethylation rate. .
- the present invention also provides a carboxymethyl group-containing modified hyaluronic acid and / or a salt thereof having a high whiteness and a high carboxymethylation rate, and cosmetics, food compositions and pharmaceutical compositions containing the same.
- the present inventor has found that by reacting hyaluronic acid with haloacetic acid and / or a salt thereof under specific conditions, a modified hyaluronic acid having high whiteness and a predetermined carboxymethylation rate can be obtained. It was.
- the inventors of the present application have also found that the carboxymethyl group-containing modified hyaluronic acid and / or salt thereof obtained by using this method has high whiteness, excellent water retention, and low viscosity.
- a dissolved raw material hyaluronic acid and / or salt thereof is treated with haloacetic acid and / or a salt thereof in a hydrous solvent having a temperature of 30 ° C. or lower.
- the haloacetic acid may be chloroacetic acid and / or bromoacetic acid.
- the dissolved raw material hyaluronic acid and / or salt thereof has a molecular weight of 4,000 to 4,000,000. be able to.
- the b value representing the hue of the color of the obtained carboxymethyl group-containing modified hyaluronic acid and / or salt thereof is It can be 5 or less.
- a carboxymethyl group-containing modified hyaluronic acid having a molecular weight of 800,000 or more is obtained by the reaction step. be able to.
- a carboxymethylation rate with respect to a disaccharide unit constituting hyaluronic acid is 5% or more and 200% or less by the reaction step.
- a carboxymethyl group-containing modified hyaluronic acid can be obtained.
- the carboxymethyl group-containing modified hyaluronic acid and / or salt thereof according to one embodiment of the present invention has a molecular weight of 800,000 or more, and a carboxymethylation rate with respect to a disaccharide unit constituting hyaluronic acid is 5% or more and 200% or less. is there.
- the carboxymethyl group-containing modified hyaluronic acid and / or salt thereof described in 8 above may have a kinematic viscosity of 30 mm 2 / s to 200 mm 2 / s.
- the carboxymethyl group-containing modified hyaluronic acid and / or salt thereof described in any one of 8 to 10 above may have a b value representing a color hue of 5 or less.
- a carboxymethyl group-containing modified hyaluronic acid and / or salt thereof according to any one of 1 to 5 above, a carboxymethyl group-containing modification having a molecular weight of 4,000 or more and less than 800,000 by the reacting step.
- Hyaluronic acid and / or a salt thereof can be obtained.
- the carboxymethyl group-containing modified hyaluronic acid and / or salt thereof according to one embodiment of the present invention has a molecular weight of 4,000 or more and less than 800,000, and a carboxymethylation rate with respect to a disaccharide unit constituting hyaluronic acid is 60% or more.
- a carboxymethyl group-containing modified hyaluronic acid that is 200% or less can be obtained.
- the carboxymethyl group-containing modified hyaluronic acid and / or salt thereof described in 14 above may have a kinematic viscosity of 1 mm 2 / s to 200 mm 2 / s.
- the carboxymethyl group-containing modified hyaluronic acid and / or salt thereof according to any one of the above 14 to 16, may have a b value representing a color hue of 5 or less.
- a cosmetic according to one embodiment of the present invention contains the carboxymethyl group-containing modified hyaluronic acid and / or salt thereof according to any one of 8 to 11, 14 to 17.
- the food composition which concerns on 1 aspect of this invention contains the carboxymethyl group containing modified hyaluronic acid in any one of said 8 thru
- the pharmaceutical composition which concerns on 1 aspect of this invention contains the carboxymethyl group containing modified hyaluronic acid in any one of said 8 thru
- the carboxymethyl group-containing modified hyaluronic acid and / or salt thereof described in 8 to 11 above has a molecular weight of 800,000 or more, and a carboxymethylation rate with respect to a disaccharide unit constituting hyaluronic acid is 5% or more and 200% or less.
- the carboxymethyl group-containing modified hyaluronic acid and / or salt thereof described in 14 to 17 above has a molecular weight of 4,000 or more and less than 800,000, and the carboxymethylation rate with respect to a disaccharide unit constituting hyaluronic acid Is 60% or more and 200% or less, it has water retention and has a smaller viscosity than hyaluronic acid having the same molecular weight.
- the carboxymethyl group-containing modified hyaluronic acid and / or salt thereof has high whiteness, low stickiness, good touch (has a smooth touch), and good texture Therefore, it can be used, for example, as a component of pharmaceuticals, cosmetics and foods.
- FIG. 1 is a graph showing the results of measuring the water retention rate of a carboxymethyl group-containing modified hyaluronic acid and / or salt thereof according to an example of the present invention.
- FIG. 2 is a diagram showing the results of a sensory test on the viscosity of a carboxymethyl group-containing modified hyaluronic acid and / or salt thereof according to an example of the present invention.
- FIG. 3 is a diagram showing the results of a sensory test relating to the feel of a carboxymethyl group-containing modified hyaluronic acid and / or salt thereof according to an example of the present invention.
- parts means “parts by mass” and “%” means “mass%” unless otherwise specified.
- the method for producing a carboxymethyl group-containing modified hyaluronic acid and / or salt thereof (sometimes referred to simply as “modified hyaluronic acid” in the present specification) according to an embodiment of the present invention has a temperature of 30 ° C. or lower. And reacting the dissolved raw material hyaluronic acid and / or salt thereof with haloacetic acid and / or salt thereof in a water-containing solvent.
- the water-containing solvent is water or a mixture of a water-soluble organic solvent and water, and the ratio of the water-soluble organic solvent in the mixture is 60 v / v% or less.
- the reaction step at least a part of hyaluronic acid and / or a salt thereof (preferably all or most of hyaluronic acid and / or a salt thereof) and haloacetic acid and / or a salt thereof in the reaction solution (aqueous solvent).
- the hyaluronic acid and / or salt thereof and the haloacetic acid and / or salt thereof can be reacted with each other in a dissolved state.
- the reaction solution may be visually transparent in that hyaluronic acid and / or a salt thereof and haloacetic acid and / or a salt thereof are dissolved.
- hyaluronic acid refers to a polysaccharide having one or more repeating structural units composed of disaccharides of glucuronic acid and N-acetylglucosamine.
- the “hyaluronic acid salt” is not particularly limited, but is preferably a food or pharmaceutically acceptable salt, for example, sodium salt, potassium salt, calcium salt, zinc salt, magnesium salt, ammonium salt, etc. Is mentioned.
- Hyaluronic acid is basically a disaccharide or more containing at least one disaccharide unit in which the 1-position of ⁇ -D-glucuronic acid and the 3-position of ⁇ -DN-acetyl-glucosamine are bonded, and ⁇ It is basically composed of -D-glucuronic acid and ⁇ -DN-acetyl-glucosamine, and is a combination of a plurality of disaccharide units.
- the sugar may be an unsaturated sugar, and examples of the unsaturated sugar include non-reducing terminal sugars, usually those having unsaturated carbon atoms between positions 4 and 5 of glucuronic acid.
- the raw material hyaluronic acid and / or salt thereof used as the raw material used in the production method according to the present embodiment may be extracted from natural products such as animals (for example, biological tissues such as chicken crown, umbilical cord, skin, joint fluid, etc.). Well, or those obtained by culturing microorganisms, animal cells or plant cells (for example, fermentation methods using bacteria of the genus Streptococcus, etc.), chemically synthesized or enzymatically synthesized, etc. can be used. .
- animals for example, biological tissues such as chicken crown, umbilical cord, skin, joint fluid, etc.
- well or those obtained by culturing microorganisms, animal cells or plant cells (for example, fermentation methods using bacteria of the genus Streptococcus, etc.), chemically synthesized or enzymatically synthesized, etc. can be used. .
- raw material hyaluronic acid and / or a salt thereof either the crude extract or the purified product may be used, but the purity is 90% in that the purified product, specifically, carboxymethylation can proceed smoothly. It is preferable to use raw material hyaluronic acid and / or a salt thereof having a (mass ratio) above.
- the average molecular weight of the raw material hyaluronic acid and / or salt thereof dissolved in the reacting step is usually from 4,000 to 4,000,000 in that carboxymethylation can be performed smoothly. It is preferable that it is 3 million or less.
- the average molecular weight of the raw material hyaluronic acid and / or salt thereof can be measured by the following method.
- ⁇ Measurement method of molecular weight That is, about 0.05 g of (purified) hyaluronic acid (this product) was accurately weighed and dissolved in 0.2 mol / L sodium chloride solution to make exactly 100 mL, and 8 mL, 12 mL and 16 mL of this solution were accurately A sample solution is prepared by adding 0.2 mol / L sodium chloride solution to each to make exactly 20 mL. This sample solution and a 0.2 mol / L sodium chloride solution were 30.0 ⁇ 0.1 ° C. according to the viscosity measurement method (first method capillary viscometry method) of the Japanese Pharmacopoeia (16th revision) general test method.
- the specific viscosity is measured by (Equation (A)), and the reduced viscosity at each concentration is calculated (Equation (B)).
- a graph is drawn with the reduced viscosity on the vertical axis and the concentration (g / 100 mL) of the product converted to dry matter on the horizontal axis, and the intrinsic viscosity is determined from the intersection of the straight line connecting the points and the vertical axis.
- the intrinsic viscosity obtained here is substituted into Laurent's formula (formula (C)), and the average molecular weight is calculated (Torvar C Laurent, Marion Ryan, and Adolph Pietroszkiewicz, "Fractionation of hyaluronic Acid,” Biocetic Acid. , 42, 476-485 (1960), Chikako Yokata, “Molecular weight evaluation of sodium hyaluronate preparations by SEC-MALLS”, National Institute of Health, 121, 030-033 (2003)).
- the content of the raw material hyaluronic acid and / or its salt is an indicator of the purity of the raw material hyaluronic acid and / or its salt
- the content of the raw material hyaluronic acid and / or its salt is It can be said that the greater the amount, the higher the purity of the raw material hyaluronic acid and / or its salt.
- the hyaluronic acid content in the raw material hyaluronic acid and / or its salt is a value calculated from the glucuronic acid quantitative value measured by the carbazole sulfate method (for example, Japanese Pharmacopoeia).
- an aqueous solution of hyaluronic acid is added and mixed in a sodium borate / sulfuric acid solution, the hyaluronic acid is decomposed by heating, cooled, mixed with a carbazole / ethanol solution, heated and left to cool.
- This is a method for measuring absorbance (530 nm).
- a calibration curve is prepared using D-glucuronolactone treated in the same manner, and a D-glucuronolactone conversion value is calculated, and then multiplied by 1.102 to obtain a glucuronic acid quantitative value.
- the obtained glucuronic acid quantitative value is multiplied by (molecular weight of hyaluronic acid / molecular weight of glucuronic acid) to calculate the content of hyaluronic acid.
- modified hyaluronic acid and / or salt thereof refers to hyaluronic acid and / or a salt thereof in which an organic group is introduced at least partially, and is different from hyaluronic acid and / or a salt thereof. It has a structure.
- organic group refers to a group having a carbon atom.
- carboxymethyl group refers to the group represented by.
- carboxymethyl group-containing modified hyaluronic acid and / or salt thereof refers to hyaluronic acid and / or salt thereof into which a carboxymethyl group has been introduced at least partially.
- the hydroxyl group constituting hyaluronic acid (see the following formula (1)) (in the following formula (1), N-acetylglucosamine constituting the hyaluronic acid is used.
- C-4 position, C-6 position, and at least a part of the hydroxyl atoms of glucuronic acid constituting hyaluronic acid (C-2 position, C-3 position) are —CH 2 —CO 2 H and / or Or a group represented by —CH 2 —CO 2 — ).
- the hydrogen atom of the hydroxyl group at one or more positions among the hydroxyl groups at these positions is —CH 2 —CO 2 H and / or —CH 2 —CO 2.
- the group represented by- may be substituted.
- disaccharide unit constituting hyaluronic acid refers to one unit composed of disaccharides (glucuronic acid and N-acetylglucosamine) adjoining to constitute hyaluronic acid.
- Carboxymethylation rate with respect to disaccharide units constituting an acid is the number of carboxymethyl groups contained in one unit relative to the one unit, and more specifically, when the unit is 100%. The ratio (%) of the number of carboxymethyl groups contained in one unit relative to the one unit.
- n a number of 1 to 7,500.
- the modified hyaluronic acid according to the present embodiment can be, for example, a compound represented by the following formula (2).
- R 1 to R 5 independently represent a hydroxyl group, a group represented by —CH 2 —CO 2 H, or a group represented by —CH 2 —CO 2 — (where R 1 to R Except for the case where each R 5 represents a hydroxyl group.)
- N represents a number from 1 to 7,500.
- ⁇ PH> In the production method according to this embodiment, it is preferably carried out under basic conditions used for the reaction in that the nucleophilicity of the hydroxyl group can be increased, and the pH of the reaction solution (hydrous solvent) is 9 or more ( 9 or more and 14 or less, preferably 10 or more and 14 or less, more preferably 11 or more and 14 or less.
- a basic electrolyte in order to adjust the reaction solution to basic, a basic electrolyte can be used in the reaction solution.
- the basic electrolyte include alkali metal hydroxides such as sodium hydroxide and potassium hydroxide, and alkaline earth metal hydroxides such as calcium hydroxide, magnesium hydroxide and barium hydroxide.
- the concentration of the basic electrolyte in the reaction solution is, for example, 0.2 mol / L or more and 10 mol / L in that any of the modified hyaluronic acids of the first example and the second example described later can be efficiently obtained. Or less, preferably 0.5 mol / L or more and 8 mol / L or less.
- the concentration of the hyaluronic acid in the water-containing solvent is 0.05 g / mL or more and 0.5 g / mL in that any modified hyaluronic acid of the first example and the second example described later can be efficiently obtained.
- the following is preferable.
- the haloacetic acid and / or salt thereof is obtained by using a carboxymethyl group as a raw material hyaluronic acid. And / or used to introduce salts thereof.
- the haloacetic acid can be, for example, monohaloacetic acid and / or a salt thereof, and more specifically, chloroacetic acid and / or a salt thereof, or bromoacetic acid or a salt thereof is preferable.
- the salt of haloacetic acid is preferably, for example, an alkali metal salt of chloroacetic acid and / or an alkali metal salt of bromoacetic acid, and more preferably sodium chloroacetate and / or sodium bromoacetate.
- the amount of haloacetic acid and / or its salt used is usually 10% or more and 500% or less (mass ratio) of the amount of raw material hyaluronic acid and / or its salt used, and 50% or more and 200% or less (mass ratio). Is preferred.
- the water-containing solvent is water or a mixed solution of a water-soluble organic solvent and water, so that the raw material hyaluronic acid and / or a salt thereof is excellent in solubility.
- the hydrous solvent is a mixed solution of a water-soluble organic solvent and water, that is, when the hydrous solvent contains both water and the water-soluble organic solvent, the hydrous solvent can improve the solubility of hyaluronic acid.
- the ratio of the water-soluble organic solvent is usually 60 v / v% or less (over 0 v / v% to 60 v / v% or less), 40 v / v% or less (over 0 v / v% to 40 v / v% or less) ) Is preferable.
- water-soluble organic solvent examples include alcohol solvents such as methanol, ethanol, 1-propanol, and 2-propanol, ketone solvents such as acetone and methyl ethyl ketone, tetrahydrofuran, acetonitrile, and the like. Can be used in combination. Of these, lower alcohols having 1, 2 or 3 carbon atoms such as isopropanol and ethanol are preferred.
- the temperature of the reaction solution is usually 30 ° C. or lower (preferably higher than 0 ° C. and 30 ° C. or lower) from the viewpoint that carboxylation can proceed smoothly and a decrease in molecular weight can be suppressed. More preferably, it is 10 ° C. or lower (preferably higher than 0 ° C. and 30 ° C. or lower). In particular, by setting the temperature of the reaction solution to 10 ° C. or less, modified hyaluronic acids having a high molecular weight (800,000 or more) can be easily obtained.
- the temperature of the reaction liquid in (1) is usually (preferably higher than 0 ° C. and not higher than 30 ° C.), and preferably not lower than 1 ° C. and not higher than 30 ° C.
- the temperature of the reaction solution in the reaction is usually 10 ° C. or lower (preferably higher than 0 ° C. and 10 ° C. or lower), and preferably 1 ° C. or higher and 10 ° C. or lower.
- the carboxymethylation rate (hereinafter simply referred to as “carboxymethylation”) for a disaccharide unit having a high molecular weight (for example, a molecular weight of 800,000 or more) and constituting hyaluronic acid.
- carboxymethylation for a disaccharide unit having a high molecular weight (for example, a molecular weight of 800,000 or more) and constituting hyaluronic acid.
- carboxymethylation for a disaccharide unit having a high molecular weight (for example, a molecular weight of 800,000 or more) and constituting hyaluronic acid.
- carboxymethylation rate for a disaccharide unit having a high molecular weight (for example, a molecular weight of 800,000 or more) and constituting hyaluronic acid.
- modified hyaluronic acids having a high for example, 50% or more, preferably 50% or more and 200% or less
- a modified hyaluronic acid having a low molecular weight (for example, a molecular weight of less than 800,000) and a high carboxymethylation rate (for example, 60% or more, preferably 60% or more and 200% or less), which is a second example described later, is produced.
- the reaction is preferably carried out at a temperature of 10 ° C. or higher (for example, 10 ° C. or higher and 35 ° C. or lower, preferably 15 ° C. or higher, more preferably 20 ° C. or higher, more preferably room temperature).
- reaction time is usually preferably 30 minutes or longer and 100 hours or shorter, more preferably 60 minutes or longer and 60 hours or shorter from the viewpoint that the carboxylation can proceed smoothly and the decrease in molecular weight can be suppressed. preferable.
- modified hyaluronic acids having a molecular weight of 800,000 or more can be easily obtained. That is, according to the production method according to the present embodiment, modified hyaluronic acids having high molecular weight and high whiteness can be easily obtained.
- the carboxymethylation rate of the obtained modified hyaluronic acid can be 5% or more and 200% or less.
- modified hyaluronic acids having a molecular weight of 4,000 or more and less than 800,000 can be easily obtained.
- the carboxymethylation rate of the obtained modified hyaluronic acid can be 60% or more and 200% or less. That is, according to the production method according to the present embodiment, modified hyaluronic acids having a relatively low molecular weight of 4,000 to less than 800,000, a high carboxymethyl group of 60% to 200%, and high whiteness are obtained. It can be easily obtained.
- the carboxymethyl group-containing modified hyaluronic acid and / or salt thereof (modified hyaluronic acid) according to this embodiment has a molecular weight of 4,000 to 2,000,000.
- the molecular weight of the carboxylmethyl group-containing modified hyaluronic acid and / or salt thereof can be measured by the following method.
- a gel filtration column Using a gel filtration column, a plurality of (purified) hyaluronic acids (reference substances) with known molecular weights are subjected to liquid chromatography analysis, and a calibration curve is created from their retention times. Similarly, the molecular weight of the modified hyaluronic acid can be determined by performing liquid chromatography analysis on the modified hyaluronic acid to be measured and determining the molecular weight using the calibration curve.
- liquid chromatography analyzer examples include Waters Alliance 2690 HPLC Separations Module (manufactured by Waters), Waters Alliance 2695 HPLC Separations Module (manufactured by Waters), and 1200 Series. Manufactured).
- Examples of the column that can be used for liquid chromatography analysis include a column for ligand exchange chromatography (ligand exchange mode + size exclusion mode) manufactured by shodex, model name “SUGAR KS-801”, “SUGAR KS-802”, “SUGAR KS-803”, “SUGAR KS-804”, “SUGAR KS-805”, “SUGAR KS-806”, “SUGAR KS-807”, and TOSOH size exclusion chromatography columns And model name “TSKgel GMPW”.
- ligand exchange chromatography ligand exchange mode + size exclusion mode
- the carboxymethylation rate of the modified hyaluronic acid is a peak indicating the proton of the methyl group (—CH 3 ) of the N-acetyl group bonded to the C-2 position in the hyaluronic acid skeleton in the 1 H-NMR spectrum.
- the modified hyaluronic acid according to the present embodiment has a carboxymethylation rate of 5% or more and 200% or less in that the water retention is high with respect to hyaluronic acid having the same molecular weight and the viscosity is suppressed. It is preferably 10% or more and 200% or less, more preferably 50% or more and 200% or less, further preferably 60% or more and 200% or less, and 70% or more and 200% or less. It is particularly preferred that
- the carboxymethylation rate is 5% or more and 200% or less, so that the viscosity is lower than that of hyaluronic acid having the same molecular weight. For this reason, for example, it can be used as a component of pharmaceuticals, cosmetics, and foods.
- the kinematic viscosity of the modified hyaluronic acid according to the present embodiment is 1 mm 2 / s or more and 200 mm 2 / s or less.
- the kinematic viscosity of the modified hyaluronic acid according to the present embodiment can be measured using an Ubbelohde viscometer (manufactured by Shibata Scientific Instruments Co., Ltd.). At this time, a Ubbelohde viscometer having a coefficient such that the number of seconds of flow is 200 seconds or more and 1,000 seconds is selected. The measurement is performed in a constant temperature water bath at 30 ° C. so that there is no temperature change.
- the kinematic viscosity (unit: mm 2 / s) can be obtained from the product of the number of seconds of flow of the aqueous solution measured by the Ubbelohde viscometer and the coefficient of the Ubbelohde viscometer.
- the modified hyaluronic acid according to the present embodiment has a low kinematic viscosity and good tactile sensation (has a smooth tactile sensation) compared to hyaluronic acid and / or a salt thereof having the same molecular weight. And the texture is good.
- the modified hyaluronic acid according to the present embodiment When the modified hyaluronic acid according to the present embodiment is used, for example, in cosmetics, food compositions, and pharmaceuticals, the modified hyaluronic acid according to the present embodiment has a lightness of color because it does not affect the color of the product. Higher and less yellowish are preferred.
- the modified hyaluronic acids according to this embodiment may have a b value (hereinafter also simply referred to as “b value”) representing a hue of a color of 5 or less, preferably 4 or less, and preferably 3 or less. Is more preferable, and 0 or more is preferable.
- B value is a value that defines the hue (hue) of the color of the substance. The larger the b value, the stronger the yellowness, while the smaller the b value, the stronger the blueness.
- the modified hyaluronic acids according to the present embodiment can have an L value (hereinafter also simply referred to as “L value”) representing the lightness of the color of 90 or more (90 to 100), and the L value is 92 or more. It is preferable that the L value is 93 or more.
- the L value is a value that defines the lightness of the color of the substance, and is represented by a numerical value between 0 and 100.
- An L value of 100 indicates the brightest state (perfect white), while an L value of 0 indicates the darkest state (perfect black).
- B value and L value can be displayed in Lab chromaticity coordinates by the color difference display method defined by JIS Z 8730. Moreover, b value and L value can be measured with a commercially available color difference meter. In the present invention, the b value and the L value are measured for solid modified hyaluronic acids.
- the b value and L value of the modified hyaluronic acid according to the present embodiment can be obtained by, for example, attaching a 10 ⁇ lens to a color difference meter (trade name “COLOR AND COLOR DIFFERENCE METERMODEL 1001 DP”, manufactured by Nippon Denshoku Industries Co., Ltd.) It is possible to measure with 1 g or more of the measurement sample.
- a color difference meter trade name “COLOR AND COLOR DIFFERENCE METERMODEL 1001 DP”, manufactured by Nippon Denshoku Industries Co., Ltd.
- the b value measured by a color difference meter is 5 or less (moreover, the L value is 90 or more), so that a cosmetic, It can be used as a raw material for foods and pharmaceuticals.
- the first example of the modified hyaluronic acid according to this embodiment (also referred to as “high molecular weight” in the present invention) has a carboxymethylation rate of 5% or more and 200% or less (preferably 10% or more and 40% or more). Or may be 50% or more, more preferably 60% or more, still more preferably 70% or more), and the molecular weight is 800,000 or more (preferably 800,000 or more and 2 million or less). is there.
- the kinematic viscosity can be 30 mm 2 / s or more and 200 mm 2 / s or less (preferably 50 mm 2 / s or more and 200 mm 2 / s or less).
- the modified hyaluronic acid which is the first example has a molecular weight of 800,000 or more and a carboxymethylation rate of 5% or more and 200% or less, so that it is higher in molecular weight than hyaluronic acid having the same molecular weight. Since the viscosity is low, for example, when used as a component of pharmaceuticals or cosmetics, the touch is good.
- Hyaluronic acid with a molecular weight of 800,000 or higher has a higher viscosity than lower molecular weight hyaluronic acid.
- the modified hyaluronic acid as the first example has a molecular weight of 800,000 or more and a carboxymethylation rate of 5% or more and 200% or less, so that the molecular weight is as high as 800,000 or more.
- its viscosity is lower than that of hyaluronic acid of the same molecular weight.
- it when used as a pharmaceutical or cosmetic ingredient, it has less stickiness and feels good (has a smooth feel) , Has excellent texture and high whiteness.
- a second example of the modified hyaluronic acid according to the present embodiment (also referred to as “low molecular weight” in the present invention) has a carboxymethylation rate of 60% to 200% (preferably 70% to 200%). And the molecular weight is 4,000 or more and less than 800,000.
- the kinematic viscosity may be 1 mm 2 / s or more and 30 mm 2 / s or less (preferably 10 mm 2 / s or more and 29 mm 2 / s or less).
- the modified hyaluronic acid that is the second example has a molecular weight of 4,000 to less than 800,000 and a carboxymethylation rate of 60% to 200%, so that the viscosity is higher than that of hyaluronic acid having the same molecular weight. Low. For this reason, for example, when it is used as a component of pharmaceuticals or cosmetics, it has a good touch, an excellent texture, and a high whiteness.
- Examples of the method for converting carboxymethyl group-containing modified hyaluronic acid according to the present embodiment into a salt thereof include, for example, an alkaline aqueous solution (for example, sodium hydroxide, potassium hydroxide, calcium hydroxide, magnesium hydroxide, ammonium hydroxide, etc. And an aqueous solution).
- an acid aqueous solution for example, an aqueous solution of hydrochloric acid, sulfuric acid, nitric acid, phosphoric acid, etc.
- a method using an acidic cation exchange resin for example, an alkaline aqueous solution (for example, sodium hydroxide, potassium hydroxide, calcium hydroxide, magnesium hydroxide, ammonium hydroxide, etc.
- an aqueous solution for example, an acid aqueous solution (for example, an aqueous solution of hydrochloric acid, sulfuric acid, nitric acid, phosphoric acid, etc.) is used.
- the modified hyaluronic acid according to the present embodiment has a high water retention effect due to the carboxyl group constituting the carboxymethyl group. For this reason, it has a high water retention effect in biological tissues such as skin.
- the modified hyaluronic acid according to this embodiment may be applied to or ingested on the surface of a living tissue, and particularly preferably applied to or contacted with skin such as the face, arms, fingers, feet, and joints.
- the modified hyaluronic acid according to this embodiment has a lower viscosity than the hyaluronic acid having the same molecular weight due to the carboxyl group constituting the carboxymethyl group. For this reason, for example, when used in cosmetics, it is less sticky and has a good touch (has a smooth feel), so it can be used as a cosmetic ingredient. Moreover, the modified hyaluronic acids according to the present embodiment are excellent in solubility in water, and can be used for various products containing water, for example.
- modified hyaluronic acids according to this embodiment can be taken orally. Therefore, the modified hyaluronic acids according to the present embodiment can be used as, for example, pharmaceutical ingredients and food ingredients.
- Carboxymethylcellulose (hereinafter also referred to as “CMC”) is widely used as, for example, an emulsifier, a thickener and the like.
- This CMC is industrially produced by treating cellulose with a large amount of alkaline water to obtain alkaline cellulose, then dispersing the cellulose in a water-containing organic solvent and reacting with monohaloacetic acid (Japanese Patent Laid-Open No. 2000-34301). Issue gazette).
- ⁇ Effect> (Method for producing modified hyaluronic acid) (1) Prevention of browning
- the modified hyaluronic acid having a high whiteness for example, a b value of 5 or less
- the production method of the present embodiment at least a part of the raw material hyaluronic acid and / or salt thereof and haloacetic acid and / or salt thereof are dissolved in the reaction solution (mixed solution).
- the hyaluronic acid and / or salt thereof and the haloacetic acid and / or salt thereof can be reacted.
- carboxymethylation advances smoothly.
- modified hyaluronic acids having high whiteness can be easily obtained without undergoing normal purification such as activated carbon treatment, and thus production efficiency is excellent.
- the manufacturing method which concerns on this embodiment does not exclude performing normal refinement
- the generated modified hyaluronic acid is dissolved in the reaction solution in the reaction step.
- an organic solvent such as ethanol is added to the reaction solution, and the produced modified hyaluronic acid is precipitated and recovered, thereby producing the produced modified hyaluronic acid and the haloacetic acid and / or salt thereof as a reactant. Can be easily separated. For this reason, post-processing is simple.
- modified hyaluronic acid has a carboxymethyl group, and thus has a carboxyl group more than that of unmodified hyaluronic acid having the same molecular weight and / or a salt thereof. Since it contains many, the water retention effect is more excellent.
- the molecular weight is 800,000 or more
- the carboxymethylation rate is 5% or more and 200% or less
- the molecular weight is 4,000 or more and less than 800,000.
- the carboxymethylation rate is 60% or more and 200% or less
- it has high water retention and has a low viscosity as compared with hyaluronic acid having the same molecular weight.
- the modified hyaluronic acids according to the present embodiment have little stickiness, good tactile sensation (has a smooth tactile sensation), and good texture, and are used, for example, as components of pharmaceuticals, cosmetics, and foods. be able to.
- the modified hyaluronic acids according to the present embodiment are obtained by the production method according to the present embodiment, browning during the reaction is suppressed.
- the modified hyaluronic acid according to the present embodiment has a b value representing a hue of a color of 5 or less and high whiteness.
- carboxymethyl group has high biocompatibility and low antigenicity.
- carboxymethylated cellulose having a carboxymethyl group is used in a wide range of applications such as cosmetics, pharmaceuticals, and foods as described above.
- hyaluronic acid is used in a wide range of applications such as cosmetics, pharmaceuticals, and foods. Therefore, the modified hyaluronic acid according to this embodiment in which a part of the functional group of hyaluronic acid is carboxymethylated has high biocompatibility and low antigenicity.
- hyaluronic acid is originally different from cellulose which is poorly water-soluble in that it is excellent in water-solubility. That is, cellulose is carboxymethylated for the purpose of improving water solubility, whereas carboxymethylation of hyaluronic acid is intended to further improve the water retention effect rather than to improve water solubility. In that respect, it is novel and original, completely different in conception and action from cellulose carboxymethylation.
- the cosmetic according to one embodiment of the present invention contains the modified hyaluronic acid according to the above embodiment.
- the content of the modified hyaluronic acid in the cosmetic according to the present embodiment is, for example, 0.001% by mass or more and 5% by mass or less, and can be appropriately determined according to the usage form.
- the aspect of the cosmetic according to the present embodiment is not particularly limited, and examples thereof include skin cosmetics.
- the modified hyaluronic acid according to the above embodiment for skin cosmetics, it has an appropriate viscosity and has a high water retention effect, so moisturizes the skin and improves the feeling of bulkiness of the skin. it can.
- Examples of the cosmetic for skin according to the present embodiment include, for example, face wash, cleanser, lotion (for example, whitening lotion), cream (for example, vanishing cream, cold cream), milky lotion, cosmetic liquid, pack ( For example, jelly-type peel-off type, paste-type wipe-off type, powder-type wash-out type), cleansing, foundation, lipstick, lip balm, lip gloss, lip liner, blusher, shaving lotion, after sun lotion, deodorant lotion, body lotion (hand care lotion) Body oils, soaps, and bath additives.
- the following ingredients may be further blended in the cosmetic according to the present embodiment.
- the component include cationized polysaccharides (eg, cationized hyaluronic acid, cationized hydroxyethyl cellulose, cationized guar gum, cationized starch, cationized locust bean gum, cationized dextran, cationized chitosan, and cationized honey).
- cationized polysaccharides eg, cationized hyaluronic acid, cationized hydroxyethyl cellulose, cationized guar gum, cationized starch, cationized locust bean gum, cationized dextran, cationized chitosan, and cationized honey).
- Anionic surfactants eg, alkylbenzene sulfonates, polyoxyalkylene alkyl ether sulfates, alkyl sulfates, olefin sulfonates, fatty acid salts, dialkylsulfosuccinates, etc.
- nonionic surfactants eg , Polyoxyethylene fatty acid esters, polyoxyethylene hydrogenated castor oil derivatives, etc.
- cationic surfactants eg, alkyltrimethylammonium salts, dialkyldimethylammonium salts, alkylpyridines
- Um salt stearyltrimethylammonium chloride, etc.
- amphoteric surfactant eg, alkylbetaine, alkylamidopropylbetaine, imidazolinium betaine, egg yolk lecithin, soybean lecithin, etc.
- oil eg, silicone, silicone derivatives, liquid paraffin, Squalane, beeswax
- the food composition which concerns on one Embodiment of this invention contains the modified hyaluronic acid which concerns on the said embodiment.
- the content of the modified hyaluronic acid in the food composition according to the present embodiment is, for example, 0.001% by mass or more and 5% by mass or less, and can be appropriately determined according to the usage form.
- the aspect of the food composition containing the modified hyaluronic acid according to the present embodiment is not particularly limited, for example, processed rice foods that are staple foods, bread making, etc., canned retort canned foods, frozen foods, side dishes, dried foods, etc.
- processed rice foods that are staple foods, bread making, etc.
- canned retort canned foods frozen foods, side dishes, dried foods, etc.
- seasonings such as mayonnaise, beverages, confectionery, desserts, liquids, gels, soft capsules, etc.
- general health foods that are permitted to express physiological functions Can do.
- the pharmaceutical composition which concerns on one Embodiment of this invention contains the modified hyaluronic acid which concerns on the said embodiment.
- the content of the modified hyaluronic acid in the pharmaceutical composition according to this embodiment is, for example, 0.001% by mass and 5% by mass or less, and can be appropriately determined according to the usage form.
- the usage pattern of the pharmaceutical composition according to this embodiment is not particularly limited, and may be a powder, granule, high-concentration liquid, low-concentration liquid, or the like.
- a dry form is preferable to a liquid form.
- the pharmaceutical composition according to the present embodiment is blended with a bulking agent, a binder, a lubricant, a preservative, an antioxidant, a fragrance, a sweetener, an acidulant, an excipient, and the like as necessary. be able to.
- vitamins such as vitamin C, vitamin B2, vitamin B12, and vitamin E, various nutritional components such as nutritional components such as nucleic acid, chondroitin sulfate, and collagen, and mineral components such as iron and zinc can also be blended.
- Example 1 Preparation of carboxymethyl group-containing modified hyaluronic acid> After weighing 1.04 g of sodium hydroxide into a 30 mL sample bottle, 8 mL of water was added and dissolved. Next, 2.0 g of hyaluronic acid was added and dissolved, then 1.52 g of sodium monochloroacetate was added and dissolved, and the mixture was allowed to stand at room temperature for 48 hours. Here, the pH of the reaction solution was 13. Thereafter, 80 mL of ethanol was placed in a 200 mL beaker, and the reaction solution was added with stirring to precipitate carboxymethyl group-containing modified hyaluronic acid.
- the precipitate was collected in a 200 mL beaker with a 400-mesh filter cloth, and then 40 mL of a 10% sodium chloride aqueous solution was added to dissolve the precipitate. Further, after adjusting the pH with an 8% aqueous hydrochloric acid solution, 80 mL of ethanol was added to the solution while stirring to precipitate the carboxymethyl group-containing modified hyaluronic acid again. After washing three times with 100 mL of 80% aqueous ethanol, the solution was filtered under reduced pressure and dried under reduced pressure at 55 ° C. for 3 hours to obtain Experiment No. 1-containing modified hyaluronic acid.
- Example 2 Preparation of carboxymethyl group-containing modified hyaluronic acid> Except that the concentration of sodium hydroxide, the amount of aqueous solvent used, the type of solvent, the type and amount of haloacetic acid and / or its salt, the reaction temperature, and the reaction time were changed as shown in Table 1 and Table 2.
- carboxymethyl group-containing modified hyaluronic acid of Experiment Nos. 2 to 36 was obtained.
- “room temperature” means a temperature of 25 ° C. or higher and 30 ° C. or lower.
- Table 1 shows the results using sodium monochloroacetate as the haloacetic acid and / or salt thereof
- Table 2 shows the results using monobromoacetic acid as the haloacetic acid and / or salt thereof.
- the molecular weight of the carboxymethyl group-containing modified hyaluronic acid obtained in Experiment Nos. 1 to 36 was measured by the method described in the above embodiment. Further, the kinematic viscosity of the carboxymethyl group-containing modified hyaluronic acid obtained in Experiment Nos. 2, 20, 21, 23, 27, and 36 was measured by the method described in the above-described embodiment. 2 /s,91.8mm 2 /s,54.7mm 2 / s, was a 92mm 2 /s,9.69mm 2 /s,121.10mm 2 / s .
- the carboxymethylation rate of the carboxymethyl group-containing modified hyaluronic acid obtained in Experiment Nos. 1 to 36 was determined from the integrated value of 1 H-NMR spectrum by the following method.
- sample preparation 7 mg of a sample and 1 mg of sodium 4,4-dimethyl-4-silapentanesulfonate (DSS) as an internal standard substance were dissolved in 0.7 mL of heavy water, transferred to an NMR sample tube, and capped.
- DSS sodium 4,4-dimethyl-4-silapentanesulfonate
- the carboxymethyl group-containing modified hyaluronic acid and / or salt thereof of the present invention has little stickiness, good tactile feel, little stickiness, good touch (has a smooth feel), and has a texture. Since it is good, it can be used, for example, as a component of pharmaceuticals, cosmetics and foods.
- modified hyaluronic acid having a relatively low molecular weight (less than 800,000) and a high carboxymethylation rate (60% or more and 200% or less) is used.
- a relatively low molecular weight less than 800,000
- a high carboxymethylation rate 60% or more and 200% or less
- Example 1 Water retention test> The weighing bottle was placed in a vacuum dryer together with 10 g of phosphorus (V) oxide and dried at 60 ° C. for 30 minutes under reduced pressure. After the dried weighing bottle was cooled in a desiccator, the weight of the empty weighing bottle was measured, and 1.0 g of the 1.0% solution of the carboxymethyl group-containing modified hyaluronic acid of the above experiment numbers 6, 12 and 23 was weighed. did.
- FIG. 1 shows the measurement results of the water retention of the modified hyaluronic acid and the hyaluronic acid.
- the left side is the water retention rate of hyaluronic acid (unmodified), and the right side is the water retention rate of carboxymethyl group-containing modified hyaluronic acid, which are shown in pairs for each molecular weight.
- FIG. 1 shows that the carboxymethyl group-containing modified hyaluronic acid of the present invention has a higher water retention rate than hyaluronic acid having the same molecular weight.
- ⁇ Test Example 2 Sensory test> Sensory evaluation was performed about the viscosity (visual observation) and feel of the modified hyaluronic acid of the experiment number 21. In the sensory evaluation, hyaluronic acid (both manufactured by QP Corporation) having a molecular weight of 800,000 and a molecular weight of 1.17 million was used as a control.
- Evaluation was performed by 6 adult men and women (5 men and 1 woman) as panelists, and the viscosity (visual observation) and feel of molecular weight of 800,000 were evaluated based on the following evaluation criteria.
- the average of the evaluation results of 6 people is shown in FIGS. 2 and 3, respectively.
- the evaluation sample used the aqueous solution whose concentration of each sample is 1%. Moreover, about the touch, the touch when this aqueous solution was apply
- Viscosity visual: 5 points (high viscosity), 4 points (slightly high viscosity), 3 points (normal viscosity), 2 points (slightly low viscosity), 1 point (low viscosity)
- Feel 5 points (smooth), 4 points (less sticky, rather smooth) 3 points (sticky), 2 points (slightly sticky), 1 point (sticky)
- the carboxymethyl group-containing modified hyaluronic acid of the present invention is less sticky and dull and has a low viscosity appearance as compared to hyaluronic acid having the same molecular weight. I understand that.
- the carboxymethyl group-containing modified hyaluronic acid of the experiment number 21 was obtained by carrying out the reaction at a temperature of 30 ° C. or less, it was recognized visually to be white, and b representing the hue of the color Since the value is 5 or less, it can be understood that the whiteness is high.
- the carboxymethyl group-containing modified hyaluronic acid having the experiment numbers 18 and 30 was obtained by carrying out the reaction at a temperature exceeding 30 ° C., so that browning was visually observed and b represents the hue of the color. Since the value greatly exceeded 5, it can be understood that the whiteness is low.
- ⁇ Formulation example 1 lotion>
- a lotion containing the carboxymethyl group-containing modified hyaluronic acid obtained in Experimental Example 1 was prepared according to the formulation described below.
- Carboxymethyl group-containing modified hyaluronic acid (Experimental Example 1) 0.2% Sodium hyaluronate 0.1% Hydrolyzed hyaluronic acid 0.1% Hydrolyzed alkyl hyaluronate (C12-13) glyceryl 0.1% Collagen peptide 0.1% 1,3-butylene glycol 5.0% Glycerol 3.0% Isostearyl alcohol 0.1% Tocopherol acetate 0.1% POE (20) sorbitan monolaurate 0.5% POE (15) lauryl alcohol ether 0.5% Zinc pyrrolidonecarboxylate 0.1% Ethylparaben 0.1% Methylparaben 0.15% Ethanol 5.0% Perfume Appropriate amount Purified water Remaining
- ⁇ Formulation Example 2 Latex>
- an emulsion was prepared by blending the carboxymethyl group-containing modified hyaluronic acid obtained in Experimental Example 1 with the following formulation.
- Carboxymethyl group-containing modified hyaluronic acid (Experimental Example 1) 0.3% Pentylene glycol 5.0% Glycerol 3.0% Squalane 5.0% Stearic acid 0.5% Stearyl alcohol 2.0% Vaseline 4.0% Sorbitan stearate 1.0% POE (10) monostearate 1.0% Carboxy vinyl polymer 0.5% Polyquaternium-51 0.1% Methylparaben 0.15% Propylparaben 0.1% Potassium hydroxide 0.1% BHT 0.02% EDTA-2 sodium 0.02% Perfume Appropriate amount Purified water Remaining
- a cream (emollient cream) was prepared by blending the carboxymethyl group-containing modified hyaluronic acid obtained in Experimental Example 2 with the formulation described below.
- Carboxymethyl group-containing modified hyaluronic acid (Experimental example 2) 0.5% Polyethylene glycol 4.0% 1,3-propanediol 6.0% Squalane 11.0% Dimethicone 1.0% Cetanol 6.0% Stearic acid 2.0% Hydrogenated cocoglyceryl 4.0% Tricaprylin 8.0% Glycerol monostearate 3.0% POE (20) cetyl alcohol ether 2.0% Coenzyme Q10 0.03% Ceramide 0.1% Dilauroyl glutamate ricin sodium 0.1% EDTA-2 sodium 0.02% Propylparaben 0.1% Methylparaben 0.15% Perfume appropriate amount Purified water remaining
- ⁇ Formulation example 4 essence>
- a cosmetic liquid (whitening moisturizing essence) was prepared by blending the carboxymethyl group-containing modified hyaluronic acid obtained in Experimental Example 2 with the formulation described below.
- Carboxymethyl group-containing modified hyaluronic acid (Experimental example 2) 0.8% Sodium hyaluronate 0.2% Hydrolyzed hyaluronic acid 0.1% 1,3-butylene glycol 5.0% Glycerin 1.5% POE sorbitan monostearate 1.0% Sorbitan monostearate 0.5% Xanthan gum 0.2% Sodium alginate 0.2% Carboxyvinyl polymer 0.2% Potassium hydroxide 0.1% Olive oil 0.2% Tocopherol 0.1% EDTA-2 sodium 0.02% Arginine 0.15% Dipotassium glycyrrhizinate 0.05% Arbutin 0.2% Retinol palmitate 0.2% Cousin extract 0.2% Seaweed extract 0.2% Tranexamic acid 0.1% Elastin 0.
- ⁇ Formulation example 5 serum pack>
- a cosmetic liquid pack (paste peel-off type) was prepared by blending the carboxymethyl group-containing modified hyaluronic acid obtained in Experimental Example 1 with the formulation described below.
- Carboxymethyl group-containing modified hyaluronic acid (Experimental Example 1) 0.5% Polyvinyl acetate emulsion 17.0% Polyvinyl alcohol 11.0% Sorbitol 5.0% Polyethylene glycol 400 5.0% Squalane 2.5% POE sorbitan monostearate 1.0% Titanium oxide 4.0% Talc 8.0% Ethanol 8.0% Methylparaben 0.15% Perfume Appropriate amount Purified water Remaining
- a face wash (cleansing foam) was prepared by blending the carboxymethyl group-containing modified hyaluronic acid obtained in Experimental Example 1 with the formulation described below.
- Carboxymethyl group-containing modified hyaluronic acid (Experimental Example 1) 0.2% Cationized hyaluronic acid 0.1% (Hypo Veil, manufactured by QP Corporation)
- Glycerin 10.0% Polyethylene glycol 400 15.0% Dipropylene glycol 10.0% Sodium lauroyl glutamate 20.0% POE (2) monostearate 5.0% Palm fatty acid sodium glutamate 8.0% Alkyl betaine 2.0% EDTA-2 sodium 0.02% Propylparaben 0.1% Methylparaben 0.15% Perfume Appropriate amount Purified water Remaining
- ⁇ Formulation example 7 Sunscreen>
- a sunscreen (milky lotion) blended with the carboxymethyl group-containing modified hyaluronic acid obtained in Experimental Example 1 was prepared according to the formulation described below.
- Carboxymethyl group-containing modified hyaluronic acid (Experimental Example 1) 0.2% 1,3-butylene glycol 3.0% Dipropylene glycol 3.0% Cyclomethicone 5.0% Dimethicone 5.0% Cetanol 1.0% Vaseline 1.0% Octyl methoxycinnamate 5.0% Titanium oxide 2.0% Zinc oxide 2.0% Sorbitan stearate 1.0% POE (20) sorbitan monostearate 1.0% Phenoxyethanol 0.8% Methylparaben 0.1% Perfume Appropriate amount Purified water Remaining
- a lip balm was prepared by blending the carboxymethyl group-containing modified hyaluronic acid obtained in Experimental Example 1 with the formulation described below.
- Carboxymethyl group-containing modified hyaluronic acid (Experimental Example 1) 0.1% Microcrystalline wax 1.5% Ceresin 12.0% Squalane 10.0% Decamethyltetrasiloxane 10.0% Diisostearyl malate 5.0% Candelilla wax 2.0% Vaseline 8.0% Glyceryl hydroxystearate 2.0% Menthol 0.05% Liquid paraffin 1.0% Tocopherol acetate 0.1% Tocopherol 0.05% Propylparaben 0.1% Perfume Appropriate amount Purified water Remaining
- ⁇ Formulation example 9 shampoo>
- a shampoo was prepared by blending the carboxymethyl group-containing modified hyaluronic acid obtained in Experimental Example 1 with the formulation described below.
- Carboxymethyl group-containing modified hyaluronic acid (Experimental Example 1) 0.2% Cationized hyaluronic acid 0.1% (Hypo Veil, manufactured by QP Corporation) POE (20) sodium lauryl ether sulfate 11.0% Lauroyl sodium aspartate 10.0%
- coconut oil fatty acid amidopropyl betaine 4.0%
- ⁇ Formulation example 10 hair conditioner>
- a hair conditioner was prepared by blending the carboxymethyl group-containing modified hyaluronic acid obtained in Experimental Example 1 with the formulation described below.
- Carboxymethyl group-containing modified hyaluronic acid (Experimental Example 1) 0.3% Cationized hyaluronic acid 0.2% (Hypo Veil, manufactured by QP Corporation)
- Stearyl alcohol 4.0% Cetanol 1.5% Hydroxyethyl urea 1.0% Aminopropyl dimethicone 1.5% Dimethicone 0.5% Hydrolyzed silk 1.0% 1,3-butylene glycol 1.0% Glycerol 3.0% Cetyl 2-ethylhexanoate 2.0% Isocetyl myristate 0.4% L-Arginine 0.1% Trehalose 0.1% Sorbitol 0.1% Keratin peptide 0.1% POE (4) stearyl ether 1.0% Stearic acid dimethylaminopropylamide 3.0% Distearyldimethyl
- ⁇ Formulation Example 11 Soft capsule>
- a soft capsule was prepared by blending the carboxymethyl group-containing modified hyaluronic acid obtained in Experimental Example 1 with the following formulation.
- Carboxymethyl group-containing modified hyaluronic acid (Experimental Example 1) 20% Olive oil 35% Beeswax 5% Medium chain triglyceride 5% Gelatin 25% Glycerin 10%
- ⁇ Formulation example 12 Powder>
- a powder (granule) was prepared by blending the carboxymethyl group-containing modified hyaluronic acid obtained in Experimental Example 1 with the formulation described below.
- Carboxymethyl group-containing modified hyaluronic acid (Experimental Example 1) 10% Lactose 60% Corn starch 25% Hypromellose 5%
- ⁇ Formulation example 13 soft capsule>
- a tablet was prepared by blending the carboxymethyl group-containing modified hyaluronic acid obtained in Experimental Example 1 with the formulation described below.
- Carboxymethyl group-containing modified hyaluronic acid (Experimental Example 1) 25% Lactose 24% 20% crystalline cellulose Corn starch 15% Dextrin 15% Silicon dioxide 1%
- ⁇ Formulation example 14 jelly beverage>
- a white peach jelly beverage containing a spout pouch was prepared by blending the carboxymethyl group-containing modified hyaluronic acid obtained in Experimental Example 1 with the formulation described below.
- Carboxymethyl group-containing modified hyaluronic acid (Experimental Example 1) 0.20% Xanthan gum 1.00% Carrageenan 0.5% Dextrin alcohol 3.0% Sucralose 1% 4-fold concentrated white peach juice 5.00% Citric acid 0.60% Sodium citrate 0.20% L-ascorbic acid 0.10% Peach flavoring 0.20% Purified water remaining
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Abstract
Description
本発明の一実施形態に係るカルボキシメチル基含有修飾ヒアルロン酸および/またはその塩(本明細書において、単に「修飾ヒアルロン酸類」と記載することもある。)の製造方法は、温度が30℃以下の含水溶媒中で、溶解した原料ヒアルロン酸および/またはその塩をハロ酢酸および/またはその塩と反応させる工程を含む。ここで、前記含水溶媒は、水、または水溶性有機溶媒と水との混合液であり、前記混合液中における水溶性有機溶媒の割合が60v/v%以下である。
本発明において、「ヒアルロン酸」とは、グルクロン酸とN-アセチルグルコサミンとの二糖からなる繰り返し構成単位を1以上有する多糖類をいう。また、「ヒアルロン酸の塩」としては、特に限定されないが、食品または薬学上許容しうる塩であることが好ましく、例えば、ナトリウム塩、カリウム塩、カルシウム塩、亜鉛塩、マグネシウム塩、アンモニウム塩等が挙げられる。
本実施形態に係る製造方法において、前記反応させる工程で溶解させる原料ヒアルロン酸および/またはその塩の平均分子量は通常、カルボキシメチル化を円滑に行うことができる点で、4,000以上400万以下であることが好ましく、300万以下であることがより好ましい。なお、原料ヒアルロン酸および/またはその塩の平均分子量は、下記の方法にて測定することができる。
即ち、約0.05gの(精製)ヒアルロン酸(本品)を精密に量り、0.2mol/L濃度の塩化ナトリウム溶液に溶かし、正確に100mLとした溶液及びこの溶液8mL、12mL並びに16mLを正確に量り、それぞれに0.2mol/L濃度の塩化ナトリウム溶液を加えて正確に20mLとした溶液を試料溶液とする。この試料溶液および0.2mol/L濃度の塩化ナトリウム溶液につき、日本薬局方(第十六改正)一般試験法の粘度測定法(第1法毛細管粘度測定法)により30.0±0.1℃で比粘度を測定し(式(A))、各濃度における還元粘度を算出する(式(B))。還元粘度を縦軸に、本品の換算した乾燥物に対する濃度(g/100mL)を横軸にとってグラフを描き、各点を結ぶ直線と縦軸との交点から極限粘度を求める。ここで求められた極限粘度をLaurentの式(式(C))に代入し、平均分子量を算出する(Torvard C Laurent,Marion Ryan,and Adolph Pietruszkiewicz,”Fractionation of hyaluronic Acid”, Biochemical et Biophysical Acta.,42,476-485(1960)、四方田千佳子、「ヒアルロン酸ナトリウム製剤のSEC-MALLSによる分子量評価」、国立衛研報、第121号,030-033(2003))。
(式B)還元粘度(dL/g)=比粘度/(本品の換算した乾燥物に対する濃度g/100mL))
(式C)極限粘度(dL/g)=3.6×10-4M0.78
M:平均分子量
原料ヒアルロン酸および/またはその塩において、原料ヒアルロン酸および/またはその塩の含有量は、原料ヒアルロン酸および/またはその塩の純度の指標であり、原料ヒアルロン酸および/またはその塩の含有量が多いほど、原料ヒアルロン酸および/またはその塩の純度が高いといえる。
本発明において、「修飾ヒアルロン酸および/またはその塩」とは、少なくとも一部に有機基が導入されているヒアルロン酸および/またはその塩のことをいい、ヒアルロン酸および/またはその塩とは異なる構造を有する。また、本発明において「有機基」とは、炭素原子を有する基のことをいう。
本実施形態に係る製造方法において、水酸基の求核性を高めることができる点で、前記反応に使用する塩基性条件下で行われることが好ましく、反応液(含水溶媒)のpHが9以上(9以上14以下、好ましくは10以上14以下、より好ましくは11以上14以下)であることがより好ましい。
本実施形態に係る修飾ヒアルロン酸類の製造方法(以下、単に「本実施形態に係る製造方法」と略することもある。)において、ハロ酢酸および/またはその塩は、カルボキシメチル基を原料ヒアルロン酸および/またはその塩に導入するために使用される。
ハロ酢酸および/またはその塩の使用量は通常、原料ヒアルロン酸および/またはその塩の使用量の10%以上500%以下(質量比)であり、50%以上200%以下(質量比)あることが好ましい。
本実施形態に係る製造方法において、前記含水溶媒が、水、または水溶性有機溶媒と水との混合液であることにより、原料ヒアルロン酸および/またはその塩の溶解性に優れている。
前記反応において、カルボキシル化を円滑に進行でき、かつ、分子量の低下を抑制できる点から、反応液の温度は通常30℃以下(好ましくは0℃を超えかつ30℃以下)であることが好ましく、10℃以下(好ましくは0℃を超えかつ30℃以下)であることがより好ましい。特に、反応液の温度を10℃以下とすることにより、高分子量(80万以上)の修飾ヒアルロン酸類を簡便に得ることができる。
前記反応において、カルボキシル化を円滑に進行でき、かつ、分子量の低下を抑制できる点から、反応時間は通常30分以上100時間以下であることが好ましく、60分以上60時間以下であることがより好ましい。
本実施形態に係る製造方法によれば、分子量が80万以上である、修飾ヒアルロン酸類を簡便に得ることができる。すなわち、本実施形態に係る製造方法によれば、高分子量であり、かつ、白色度が高い修飾ヒアルロン酸類を簡便に得ることができる。
本実施形態に係る製造方法において、分子量が4,000以上80万未満である、修飾ヒアルロン酸類を簡便に得ることができる。
<分子量>
本実施形態に係るカルボキシメチル基含有修飾ヒアルロン酸および/またはその塩(修飾ヒアルロン酸類)は、分子量が4,000以上200万以下である。本発明において、カルボキシルメチル基含有修飾ヒアルロン酸および/またはその塩の分子量は、以下の方法にて測定することができる。
本発明において、修飾ヒアルロン酸類のカルボキシメチル化率は、1H-NMRスペクトルにおいて、ヒアルロン酸骨格中のC-2位に結合するN-アセチル基のメチル基(-CH3)のプロトンを示すピーク(2ppm付近に発現)の積算値に対する、-CH2-CO2Hおよび/または-CH2-CO2 -で表される基中のメチレン基(-CH2-)のプロトンを示すピーク(3.8ppm以上4.2ppm以下の範囲に発現)の積算値の割合(%)で表される。
本実施形態に係る修飾ヒアルロン酸類の動粘度は、動粘度が1mm2/s以上200mm2/s以下である。本実施形態に係る修飾ヒアルロン酸類の動粘度は、ウベローデ粘度計(柴田科学器械工業株式会社製)を用いて測定することができる。この際、流下秒数が200秒以上1,000秒になるような係数のウベローデ粘度計を選択する。また、測定は30℃の恒温水槽中で行ない、温度変化のないようにする。ウベローデ粘度計により測定された前記水溶液の流下秒数と、ウベローデ粘度計の係数との積により、動粘度(単位:mm2/s)を求めることができる。
本実施形態に係る修飾ヒアルロン酸類を例えば化粧料、食品組成物、および医薬品などに使用する場合、製品の色に影響を及ぼさないという点から、本実施形態に係る修飾ヒアルロン酸類は色の明度が高く、かつ、黄味が弱いほうが好ましい。
(分子量および動粘度)
本実施形態に係る修飾ヒアルロン酸類の第1の例(本発明において「高分子量体」ともいう。)は、カルボキシメチル化率が5%以上200%以下(好ましくは10%以上、40%以上であってもよく、あるいは50%以上であってもよく、より好ましくは60%以上、さらに好ましくは70%以上)であり、かつ、分子量が80万以上(好ましくは80万以上200万以下)である。この場合、第1の例は、動粘度が30mm2/s以上200mm2/s以下(好ましくは50mm2/s以上200mm2/s以下)であることができる。
(分子量および動粘度)
本実施形態に係る修飾ヒアルロン酸類の第2の例(本発明において「低分子量体」ともいう。)は、カルボキシメチル化率が60%以上200%以下(好ましくは70%以上200%以下)であり、かつ、分子量が4,000以上80万未満である。この場合、第2の例は、動粘度が1mm2/s以上30mm2/s以下(好ましくは10mm2/s以上29mm2/s以下)であることができる。
本実施形態に係るカルボキシメチル基含有修飾ヒアルロン酸からその塩へと変換する方法、ならびに、本実施形態に係るカルボキシメチル基含有修飾ヒアルロン酸の塩から該修飾ヒアルロン酸へと変換する方法は、特に限定されるわけではなく、公知の方法を用いて行なうことができる。
本実施形態に係る修飾ヒアルロン酸類は、該カルボキシメチル基を構成するカルボキシル基に起因して、高い保水効果を有する。このため、例えば皮膚等の生体組織において高い保水効果を有する。本実施形態に係る修飾ヒアルロン酸類は、生体組織の表面に塗布または接触して摂取させてもよいし、特に、顔、腕、手指、足、関節などの皮膚に塗布または接触させるのが好ましい。
<公知技術(カルボキシメチル化セルロースの製造方法)>
本実施形態に係る製造方法の作用効果を説明するにあたり、まず、公知技術である、カルボキシメチル化セルロースの製造方法について説明する。
(修飾ヒアルロン酸類の製造方法)
(1)褐変の防止
本実施形態に係る製造方法によれば、温度が30℃以下の含水溶媒中で、溶解した原料ヒアルロン酸および/またはその塩をハロ酢酸および/またはその塩と反応させる工程を含むことにより、白色度が高い(例えばb値が5以下)修飾ヒアルロン酸類を簡便に得ることができる。
本実施形態に係る製造方法によれば、温度が30℃以下の含水溶媒中で、溶解した原料ヒアルロン酸および/またはその塩をハロ酢酸および/またはその塩と反応させる工程を含むことにより、所定のカルボキシメチル化率を有する修飾ヒアルロン酸を得ることができる。ここで、カルボキシメチル化率は例えば、ハロ酢酸および/またはその塩の濃度および種類、pH、原料ヒアルロン酸および/またはその塩の濃度および分子量、反応温度および反応時間を適宜選択することにより、調整することができる。
特に、本実施形態に係る製造方法によれば、上述したように、前記反応液中において、該溶解した原料ヒアルロン酸および/またはその塩と該ハロ酢酸および/またはその塩との反応性に優れているため、カルボキシメチル化が円滑に進行することから、白色度が高く、かつカルボキシメチル化率が高い(例えば、50%以上)修飾ヒアルロン酸および/またはその塩を効率良く得ることができる。
本実施形態に係る製造方法では、上記反応させる工程において、生成した修飾ヒアルロン酸類は反応液中で溶解している。このため、該反応液に例えばエタノール等の有機溶媒を添加して、生成した修飾ヒアルロン酸類を沈殿させて回収することにより、生成した修飾ヒアルロン酸類と、反応剤であるハロ酢酸および/またはその塩とを容易に分離することができる。このため、後処理が簡便である。
(1)保水効果の向上
本実施形態に係る修飾ヒアルロン酸類は、カルボキシメチル基を有することにより、修飾されていない同程度の分子量のヒアルロン酸および/またはその塩と比較して、カルボキシル基をより多く含むため、保水効果がより優れている。
本実施形態に係る修飾ヒアルロン酸類に含まれるカルボキシメチル基を構成するカルボキシルイオン(CO2-)の負電荷同士が反発することによって、該修飾ヒアルロン酸および/またはその塩の立体構造中のからみが少なくなるため、粘度が低くなると推測される。
本実施形態に係る修飾ヒアルロン酸類は、本実施形態に係る製造方法で得られたものであることにより、反応中の褐変が抑えられている。本実施形態に係る修飾ヒアルロン酸類は例えば、色の色相を表すb値が5以下であり、白色度が高い。
カルボキシメチル基は生体適合性が高く、抗原性が低い。このため、カルボキシメチル基を有するカルボキシメチル化セルロースは、上述したように、化粧品、医薬品、食品等の幅広い用途に使用されている。さらに、ヒアルロン酸は、化粧品、医薬品、食品等の幅広い用途に使用されている。したがって、ヒアルロン酸の官能基の一部がカルボキシメチル化された、本実施形態に係る修飾ヒアルロン酸類は、生体適合性が高く、抗原性が低い。
なお、ヒアルロン酸は元来、水溶性に優れている点で、元来、難水溶性であるセルロースとは異なる。すなわち、セルロースは、水溶性の向上を目的としてカルボキシメチル化するのに対して、ヒアルロン酸のカルボキシメチル化は、水溶性の向上を目的とするというよりも、保水効果のさらなる向上を目的とするものである点で、セルロースのカルボキシメチル化とは着想および作用効果が全く異なる、新規でかつ独創性を有するものである。
本発明の一実施形態に係る化粧料は、上記実施形態に係る修飾ヒアルロン酸類を含有する。本実施形態に係る化粧料における、修飾ヒアルロン酸類の含有量は例えば0.001質量%以上5質量%以下であり、使用形態に応じて適宜決定することができる。
本発明の一実施形態に係る食品組成物は、上記実施形態に係る修飾ヒアルロン酸類を含有する。本実施形態に係る食品組成物における、修飾ヒアルロン酸類の含有量は例えば0.001質量%以上5質量%以下であり、使用形態に応じて適宜決定することができる。上記実施形態に係る修飾ヒアルロン酸類を食品組成物に使用することにより、同程度のヒアルロン酸と比較して粘度が抑えられているため、食感に優れている。
本発明の一実施形態に係る医薬品組成物は、上記実施形態に係る修飾ヒアルロン酸類を含有する。本実施形態に係る医薬品組成物における、修飾ヒアルロン酸類の含有量は例えば0.001質量%5質量%以下であり、使用形態に応じて適宜決定することができる。上記実施形態に係る修飾ヒアルロン酸類を医薬品組成物に使用することにより、同程度のヒアルロン酸と比較して粘度が抑えられているため、食感に優れている。
以下、実施例によって本発明をさらに詳細に説明するが、本発明は実施例に限定されない。
30mLのサンプル瓶に水酸化ナトリウム1.04gを秤り取った後、水8mLを添加して溶解させた。次に、ヒアルロン酸2.0gを添加し溶解させた後、モノクロロ酢酸ナトリウム1.52gを添加して溶解させて、室温で48時間静置した。ここで、前記反応液のpHは13であった。その後、200mLビーカーにエタノール80mLを入れ、該反応液を撹拌しながら添加し、カルボキシメチル基含有修飾ヒアルロン酸を沈殿させた。その後、400メッシュのろ布で沈殿を200mLビーカーに回収した後、10%塩化ナトリウム水溶液40mLを添加して沈殿を溶解させた。さらに、8%塩酸水溶液でpHを調製した後、溶解液に撹拌しながらエタノール80mLを入れ、再度カルボキシメチル基含有修飾ヒアルロン酸を沈殿させた。80%含水エタノール100mLで3回洗浄した後、減圧濾過し、55℃で3時間減圧乾燥することにより、実験番号1のカルボキシメチル基含有修飾ヒアルロン酸を得た。
水酸化ナトリウムの濃度、含水溶媒の使用量、溶媒の種類、ハロ酢酸および/またはその塩の種類および使用量、反応温度、および反応時間を表1および表2のように変更した以外は、実施例1と同様の方法によって、実験番号2ないし36のカルボキシメチル基含有修飾ヒアルロン酸を得た。なお、本実施例において、「室温」とは、25℃以上30℃以下の温度を意味する。
試料7mgと内部標準物質4,4-ジメチル-4-シラペンタンスルホン酸ナトリウム(DSS)1mgを重水0.7mLに溶かし、NMR試料管に移し入れ、キャップした。
装置:Varian NMR system 400NB型(バリアンテクノロジーズジャパンリミテッド)
観測周波数:400MHz
温度:30℃
基準:DSS(0ppm)
積算回数:64回
1H-NMRスペクトルの2.0ppm付近に現れるヒアルロン酸のN-アセチル基(CH3)のピークと、3.8ppm以上4.2ppm以下の範囲に現れるカルボキシメチル基のメチレン基(-CH2―)のピークを積分した。積分値から下記の式より、修飾ヒアルロン酸を構成するヒアルロン酸の2糖繰り返し単位毎に結合しているカルボキシメチル基の数を、カルボキシメチル化率(CM化率)を求めた。
CM化率=(3.8ppm以上4.2ppm以下の範囲に現れるピーク積分値/2)/(2.0PPMのピーク積分値/3)
秤量瓶を酸化リン(V)10gと一緒に真空乾燥機に入れ、減圧下、60℃で30分間乾燥させた。乾燥させた秤量瓶をデシケーター中で冷ました後、空の秤量瓶の重量を測定し、上記実験番号6,12および23のカルボキシメチル基含有修飾ヒアルロン酸の1.0%液を1.0g秤量した。また、上記実験番号6,12および23で得られたカルボキシメチル基含有修飾ヒアルロン酸と同じかまたは近似する分子量(20万,90万,120万)を有する3種類のヒアルロン酸(いずれもキユーピー株式会社製)も同様の処理にて、秤量瓶に秤量した。次に、これらの秤量瓶を、シリカゲルを同封したデシケーターに入れて、35℃の恒温機に入れて22.5時間保持した後に質量を測定した。以下の式に基づいて、保水率(%)を算出した。
保水率(%)={(恒温機に入れる前のサンプルの質量)-(22.5時間後のサンプルの質量)}/(恒温機に入れる前のサンプルの質量)×100(%)
上記実験番号21の修飾ヒアルロン酸の粘度(目視)および感触について、官能評価を行った。官能評価においては、コントロール(対照)として、それぞれ分子量80万および分子量117万のヒアルロン酸(いずれもキユーピー株式会社製)を使用した。
粘度(目視)…5点(粘度が高い)、4点(粘度がやや高い)、3点(粘度が普通)、2点(粘度がやや低い)、1点(粘度が低い)
感触…5点(さらっとしている)、4点(べたつきが少なく、どちらかといえばさらっとしている)、3点(べたつきがある)、2点(べたつきがやや大きい)、1点(べたつきが大きい)
上記実験番号の18,21および30のカルボキシメチル基含有修飾ヒアルロン酸のb値およびL値を、色差計(商品名「COLOR AND COLOR DIFFERENCE METERMODEL 1001 DP」,日本電色工業株式会社製)に10Φレンズを装着し、ガラスセルに測定試料1g以上を敷き詰めて測定した。その結果を表3に示す。
本配合例では、以下に記す処方にて、実験例1で得られたカルボキシメチル基含有修飾ヒアルロン酸を配合した化粧水を調製した。
カルボキシメチル基含有修飾ヒアルロン酸(実験例1) 0.2%
ヒアルロン酸ナトリウム 0.1%
加水分解ヒアルロン酸 0.1%
加水分解ヒアルロン酸アルキル(C12-13)グリセリル 0.1%
コラーゲンペプチド 0.1%
1,3-ブチレングリコール 5.0%
グリセリン 3.0%
イソステアリルアルコール 0.1%
酢酸トコフェロール 0.1%
POE(20)ソルビタンモノラウリル酸エステル 0.5%
POE(15)ラウリルアルコールエーテル 0.5%
ピロリドンカルボン酸亜鉛 0.1%
エチルパラベン 0.1%
メチルパラベン 0.15%
エタノール 5.0%
香料 適量
精製水 残量
本配合例では、以下に記す処方にて、実験例1で得られたカルボキシメチル基含有修飾ヒアルロン酸を配合した乳液を調製した。
カルボキシメチル基含有修飾ヒアルロン酸(実験例1) 0.3%
ペンチレングリコール 5.0%
グリセリン 3.0%
スクワラン 5.0%
ステアリン酸 0.5%
ステアリルアルコール 2.0%
ワセリン 4.0%
ステアリン酸ソルビタン 1.0%
POE(10)モノステアリン酸エステル 1.0%
カルボキシビニルポリマー 0.5%
ポリクオタニウム-51 0.1%
メチルパラベン 0.15%
プロピルパラベン 0.1%
水酸化カリウム 0.1%
BHT 0.02%
EDTA-2ナトリウム 0.02%
香料 適量
精製水 残量
本配合例では、以下に記す処方にて、実験例2で得られたカルボキシメチル基含有修飾ヒアルロン酸を配合したクリーム(エモリエントクリーム)を調製した。
カルボキシメチル基含有修飾ヒアルロン酸(実験例2) 0.5%
ポリエチレングリコール 4.0%
1,3-プロパンジオール 6.0%
スクワラン 11.0%
ジメチコン 1.0%
セタノール 6.0%
ステアリン酸 2.0%
水添ココグリセリル 4.0%
トリカプリリン 8.0%
モノステアリン酸グリセリン 3.0%
POE(20)セチルアルコールエーテル 2.0%
コエンザイムQ10 0.03%
セラミド 0.1%
ジラウロイルグルタミン酸リシンナトリウム 0.1%
EDTA-2ナトリウム 0.02%
プロピルパラベン 0.1%
メチルパラベン 0.15%
香料 適量
精製水 残量
本配合例では、以下に記す処方にて、実験例2で得られたカルボキシメチル基含有修飾ヒアルロン酸を配合した美容液(美白保湿エッセンス)を調製した。
カルボキシメチル基含有修飾ヒアルロン酸(実験例2) 0.8%
ヒアルロン酸ナトリウム 0.2%
加水分解ヒアルロン酸 0.1%
1,3-ブチレングリコール 5.0%
グリセリン 1.5%
POEソルビタンモノステアリン酸エステル 1.0%
ソルビタンモノステアリン酸エステル 0.5%
キサンタンガム 0.2%
アルギン酸ナトリウム 0.2%
カルボキシビニルポリマー 0.2%
水酸化カリウム 0.1%
オリーブ油 0.2%
トコフェロール 0.1%
EDTA-2ナトリウム 0.02%
アルギニン 0.15%
グリチルリチン酸ジカリウム 0.05%
アルブチン 0.2%
パルミチン酸レチノール 0.2%
クジンエキス 0.2%
海藻エキス 0.2%
トラネキサム酸 0.1%
エラスチン 0.1%
コラーゲン 0.1%
リン酸アスコルビン酸マグネシウム 0.1%
クエン酸ナトリウム 1.0%
クエン酸 0.1%
プロピルパラベン 0.1%
メチルパラベン 0.15%
香料 適量
精製水 残量
本配合例では、以下に記す処方にて、実験例1で得られたカルボキシメチル基含有修飾ヒアルロン酸を配合した美容液パック(ペースト状ピールオフタイプ)を調製した。
カルボキシメチル基含有修飾ヒアルロン酸(実験例1) 0.5%
ポリ酢酸ビニルエマルジョン 17.0%
ポリビニルアルコール 11.0%
ソルビトール 5.0%
ポリエチレングリコール400 5.0%
スクワラン 2.5%
POEソルビタンモノステアリン酸エステル 1.0%
酸化チタン 4.0%
タルク 8.0%
エタノール 8.0%
メチルパラベン 0.15%
香料 適量
精製水 残量
本配合例では、以下に記す処方にて、実験例1で得られたカルボキシメチル基含有修飾ヒアルロン酸を配合した洗顔料(クレンジングフォーム)を調製した。
カルボキシメチル基含有修飾ヒアルロン酸(実験例1) 0.2%
カチオン化ヒアルロン酸 0.1%
(キユーピー株式会社製、ヒアロベール)
グリセリン 10.0%
ポリエチレングリコール400 15.0%
ジプロピレングリコール 10.0%
ラウロイルグルタミン酸ナトリウム 20.0%
POE(2)モノステアリン酸エステル 5.0%
パーム脂肪酸グルタミン酸ナトリウム 8.0%
アルキルベタイン 2.0%
EDTA-2ナトリウム 0.02%
プロピルパラベン 0.1%
メチルパラベン 0.15%
香料 適量
精製水 残量
本配合例では、以下に記す処方にて、実験例1で得られたカルボキシメチル基含有修飾ヒアルロン酸を配合したサンスクリーン(乳液)を調製した。
カルボキシメチル基含有修飾ヒアルロン酸(実験例1) 0.2%
1,3-ブチレングリコール 3.0%
ジプロピレングリコール 3.0%
シクロメチコン 5.0%
ジメチコン 5.0%
セタノール 1.0%
ワセリン 1.0%
メトキシケイヒ酸オクチル 5.0%
酸化チタン 2.0%
酸化亜鉛 2.0%
ステアリン酸ソルビタン 1.0%
POE(20)ソルビタンモノステアリン酸エステル 1.0%
フェノキシエタノール 0.8%
メチルパラベン 0.1%
香料 適量
精製水 残量
本配合例では、以下に記す処方にて、実験例1で得られたカルボキシメチル基含有修飾ヒアルロン酸を配合したリップクリームを調製した。
カルボキシメチル基含有修飾ヒアルロン酸(実験例1) 0.1%
マイクロクリスタリンワックス 1.5%
セレシン 12.0%
スクワラン 10.0%
デカメチルテトラシロキサン 10.0%
リンゴ酸ジイソステアリル 5.0%
キャンデリラロウ 2.0%
ワセリン 8.0%
ヒドロキシステアリン酸グリセリル 2.0%
メントール 0.05%
流動パラフィン 1.0%
酢酸トコフェロール 0.1%
トコフェロール 0.05%
プロピルパラベン 0.1%
香料 適量
精製水 残量
本配合例では、以下に記す処方にて、実験例1で得られたカルボキシメチル基含有修飾ヒアルロン酸を配合したシャンプーを調製した。
カルボキシメチル基含有修飾ヒアルロン酸(実験例1) 0.2%
カチオン化ヒアルロン酸 0.1%
(キユーピー株式会社製、ヒアロベール)
POE(20)ラウリルエーテル硫酸ナトリウム 11.0%
ラウロイルアスパラギン酸ナトリウム 10.0%
ヤシ油脂肪酸アミドプロピルベタイン 4.0%
ヤシ油脂肪酸モノエタノールアミド 2.0%
EDTA-2ナトリウム 0.1%
安息香酸ナトリウム 0.2%
フェノキシエタノール 0.8%
メチルパラベン 0.1%
香料 適量
精製水 残量
本配合例では、以下に記す処方にて、実験例1で得られたカルボキシメチル基含有修飾ヒアルロン酸を配合したヘアコンディショナーを調製した。
カルボキシメチル基含有修飾ヒアルロン酸(実験例1) 0.3%
カチオン化ヒアルロン酸 0.2%
(キユーピー株式会社製、ヒアロベール)
ステアリルアルコール 4.0%
セタノール 1.5%
ヒドロキシエチルウレア 1.0%
アミノプロピルジメチコン 1.5%
ジメチコン 0.5%
加水分解シルク 1.0%
1,3-ブチレングリコール 1.0%
グリセリン 3.0%
2-エチルヘキサン酸セチル 2.0%
ミリスチン酸イソセチル 0.4%
L-アルギニン 0.1%
トレハロース 0.1%
ソルビトール 0.1%
ケラチンペプチド 0.1%
POE(4)ステアリルエーテル 1.0%
ステアリン酸ジメチルアミノプロピルアミド 3.0%
塩化ジステアリルジメチルアンモニウム 0.2%
安息香酸ナトリウム 0.3%
フェノキシエタノール 0.8%
メチルパラベン 0.1%
香料 適量
精製水 残量
本配合例では、以下に記す処方にて、実験例1で得られたカルボキシメチル基含有修飾ヒアルロン酸を配合したソフトカプセルを調製した。
カルボキシメチル基含有修飾ヒアルロン酸(実験例1) 20%
オリーブ油 35%
ミツロウ 5%
中鎖脂肪酸トリグリセリド 5%
ゼラチン 25%
グリセリン 10%
本配合例では、以下に記す処方にて、実験例1で得られたカルボキシメチル基含有修飾ヒアルロン酸を配合した散剤(顆粒剤)を調製した。
カルボキシメチル基含有修飾ヒアルロン酸(実験例1) 10%
乳糖 60%
トウモロコシデンプン 25%
ヒプロメロース 5%
本配合例では、以下に記す処方にて、実験例1で得られたカルボキシメチル基含有修飾ヒアルロン酸を配合した錠剤を調製した。
カルボキシメチル基含有修飾ヒアルロン酸(実験例1) 25%
乳糖 24%
結晶セルロース 20%
トウモロコシデンプン 15%
デキストリン 15%
二酸化ケイ素 1%
本配合例では、以下に記す処方にて、実験例1で得られたカルボキシメチル基含有修飾ヒアルロン酸を配合したスパウトパウチ入り白桃ゼリー飲料を調製した。
カルボキシメチル基含有修飾ヒアルロン酸(実験例1) 0.20%
キサンタンガム 1.00%
カラギーナン 0.5%
デキストリンアルコール 3.0%
スクラロース 1%
4倍濃縮白桃果汁 5.00%
クエン酸 0.60%
クエン酸ナトリウム 0.20%
L-アスコルビン酸 0.10%
ピーチ香料 0.20%
精製水 残量
Claims (20)
- 温度が30℃以下の含水溶媒中で、溶解した原料ヒアルロン酸および/またはその塩をハロ酢酸および/またはその塩と反応させる工程を含み、
前記含水溶媒は、水、または水溶性有機溶媒と水との混合液であり、
前記混合液中における水溶性有機溶媒の割合が60v/v%以下である、カルボキシメチル基含有修飾ヒアルロン酸および/またはその塩の製造方法。 - 請求項1において、
前記ハロ酢酸は、クロロ酢酸および/またはブロモ酢酸である、カルボキシメチル基含有修飾ヒアルロン酸および/またはその塩の製造方法。 - 請求項1または2において、
前記含水溶媒における前記ヒアルロン酸の濃度が0.05g/mL以上0.5g/mL以下である、カルボキシメチル基含有修飾ヒアルロン酸および/またはその塩の製造方法。 - 請求項1ないし3のいずれか1項において、
前記溶解した原料ヒアルロン酸および/またはその塩の分子量が4,000以上400万以下である、カルボキシメチル基含有修飾ヒアルロン酸および/またはその塩の製造方法。 - 請求項1ないし4のいずれか1項において、
得られるカルボキシメチル基含有修飾ヒアルロン酸および/またはその塩の色の色相を表すb値が5以下である、カルボキシメチル基含有修飾ヒアルロン酸および/またはその塩の製造方法。 - 請求項1ないし5のいずれか1項において、
前記反応させる工程によって、分子量が80万以上である、カルボキシメチル基含有修飾ヒアルロン酸が得られる、カルボキシメチル基含有修飾ヒアルロン酸および/またはその塩の製造方法。 - 請求項6において、
前記反応させる工程によって、ヒアルロン酸を構成する2糖単位に対するカルボキシメチル化率が5%以上200%以下である、カルボキシメチル基含有修飾ヒアルロン酸が得られる、カルボキシメチル基含有修飾ヒアルロン酸および/またはその塩の製造方法。 - 分子量が80万以上であり、ヒアルロン酸を構成する2糖単位に対するカルボキシメチル化率が5%以上200%以下である、カルボキシメチル基含有修飾ヒアルロン酸および/またはその塩。
- 請求項8において、
動粘度が30mm2/s以上200mm2/s以下である、カルボキシメチル基含有修飾ヒアルロン酸および/またはその塩。 - 請求項8または9において、
ヒアルロン酸を構成する水酸基のうち少なくとも一部の水酸基の水素原子が、-CH2-CO2Hおよび/または-CH2-CO2 -で表される基に置換されている、カルボキシメチル基含有修飾ヒアルロン酸および/またはその塩。 - 請求項8ないし10のいずれか1項において、
色の色相を表すb値が5以下である、カルボキシメチル基含有修飾ヒアルロン酸および/またはその塩。 - 請求項1ないし5のいずれか1項において、
前記反応させる工程によって、分子量が4,000以上80万未満である、カルボキシメチル基含有修飾ヒアルロン酸が得られる、カルボキシメチル基含有修飾ヒアルロン酸および/またはその塩の製造方法。 - 請求項12において、
前記反応させる工程によって、ヒアルロン酸を構成する2糖単位に対するカルボキシメチル化率が60%以上200%以下である、カルボキシメチル基含有修飾ヒアルロン酸が得られる、カルボキシメチル基含有修飾ヒアルロン酸および/またはその塩の製造方法。 - 分子量が4,000以上80万未満であり、ヒアルロン酸を構成する2糖単位に対するカルボキシメチル化率が60%以上200%以下である、カルボキシメチル基含有修飾ヒアルロン酸および/またはその塩。
- 請求項14において、
動粘度が1mm2/s以上200mm2/s以下である、カルボキシメチル基含有修飾ヒアルロン酸および/またはその塩。 - 請求項14または15において、
ヒアルロン酸を構成する水酸基のうち少なくとも一部の水酸基の水素原子が、-CH2-CO2Hおよび/または-CH2-CO2 -で表される基に置換されている、カルボキシメチル基含有修飾ヒアルロン酸および/またはその塩。 - 請求項14ないし16のいずれか1項において、
色の色相を表すb値が5以下である、カルボキシメチル基含有修飾ヒアルロン酸および/またはその塩。 - 請求項8ないし11、14ないし17のいずれか1項に記載のカルボキシメチル基含有修飾ヒアルロン酸および/またはその塩を含有する、化粧料。
- 請求項8ないし11、14ないし17のいずれか1項に記載のカルボキシメチル基含有修飾ヒアルロン酸および/またはその塩を含有する、食品組成物。
- 請求項8ないし11、14ないし17のいずれか1項に記載のカルボキシメチル基含有修飾ヒアルロン酸および/またはその塩を含有する、医薬品組成物。
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