WO2011132725A1 - 酸化型グルタチオンの非結晶アモルファスおよびその製造方法 - Google Patents
酸化型グルタチオンの非結晶アモルファスおよびその製造方法 Download PDFInfo
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- oxidized glutathione
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- C07K5/00—Peptides containing up to four amino acids in a fully defined sequence; Derivatives thereof
- C07K5/02—Peptides containing up to four amino acids in a fully defined sequence; Derivatives thereof containing at least one abnormal peptide link
- C07K5/0215—Peptides containing up to four amino acids in a fully defined sequence; Derivatives thereof containing at least one abnormal peptide link containing natural amino acids, forming a peptide bond via their side chain functional group, e.g. epsilon-Lys, gamma-Glu
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- the present invention relates to a non-crystalline amorphous form of oxidized glutathione that is useful as, for example, products such as health foods, pharmaceuticals, and cosmetics, raw materials, or intermediates, and a method for producing the same.
- Oxidized glutathione has the same action as reduced glutathione, and as the action of oxidized glutathione, for example, detoxification action in the liver by oral administration is known (Non-patent Document 1). Therefore, oxidized glutathione can be used in various applications using reduced glutathione, and is useful, for example, as a product, raw material or intermediate for health foods, pharmaceuticals, cosmetics and the like.
- an aqueous solution containing reduced glutathione obtained by a fermentation method, an enzymatic method, or the like, or a yeast extract solution or the like is used as a raw material, and reduced glutathione is converted into oxidized glutathione in the solution.
- Patent Documents 1 and 2 adding an excipient, etc., lyophilization
- Patent Document 2 A method for obtaining an oxidized glutathione-containing yeast extract powder by spray drying or the like (Patent Document 2), and a method for producing an oxidized glutathione monohydrate crystal by dropping alcohol or the like into an oxidized glutathione-containing aqueous solution (Patent Document 3).
- Patent Document 3 A method for producing crystals of oxidized glutathione octahydrate (Non-Patent Document 2) and the like are known.
- Oxidized glutathione octahydrate crystals have a problem in that the water content contained in the crystals is not constant, the stability is poor, and it takes a long time of 3-4 days to obtain crystals. Oxidized glutathione monohydrate crystals are needle-like crystals that are prone to agglomerate, resulting in poor crystal separation, poor impurity impurity (purification ability), and slow crystal growth rate It is known that there is room for improvement.
- An object of the present invention is to provide a non-crystalline amorphous form of oxidized glutathione which is useful as a product, raw material or intermediate for health foods, pharmaceuticals, cosmetics and the like, and a method for producing the same.
- the present invention relates to the following (1) to (8).
- a method for producing an amorphous amorphous form of oxidized glutathione which comprises drying oxidized glutathione hexahydrate crystals at a temperature of 40 to 90 ° C.
- Oxidized glutathione hexahydrate crystals in powder X-ray diffraction have diffraction angles (2 ⁇ ) of 8.12 °, 9.70 °, 10.62 °, 12.44 °, 14.20.
- Oxidized glutathione hexahydrate crystals are precipitated by cooling the oxidized glutathione-containing aqueous solution to 15 ° C. or lower to precipitate oxidized glutathione hexahydrate crystals.
- Oxidized glutathione hexahydrate crystals are produced by a production method including a step of adding or dropping a solvent selected from the group consisting of alcohols and ketones to an oxidized glutathione-containing aqueous solution at 15 ° C. or lower.
- a method for producing an amorphous amorphous form of oxidized glutathione according to the above (1) or (2) is (5) A step of adding or dropping a solvent selected from the group consisting of methanol, ethanol, n-propanol and isopropyl alcohol to an oxidized glutathione-containing aqueous solution of oxidized glutathione hexahydrate at 15 ° C. or less.
- a solvent selected from the group consisting of methanol, ethanol, n-propanol and isopropyl alcohol
- Oxidized glutathione hexahydrate crystals are produced by the production method comprising a step of adding or dropping methanol to an oxidized glutathione-containing aqueous solution at 15 ° C. or lower (1) or (2) A method for producing an amorphous amorphous form of oxidized glutathione.
- a manufacturing method of amorphous amorphous is (8) An amorphous amorphous of oxidized glutathione obtained by the production method of any one of (1) to (7) above.
- the present invention provides a non-crystalline amorphous form of oxidized glutathione that is useful as a product, raw material or intermediate for health foods, pharmaceuticals, cosmetics and the like, and a method for producing the same.
- the oxidized glutathione solution may be any solution containing oxidized glutathione.
- the reduced glutathione obtained by the synthesis method, fermentation method or extraction method from yeast according to the method described in JP-A No. 61-74595 or the like is used as a reaction solution containing reduced glutathione,
- purified glutathione obtained as a purified solution, lyophilized powder, etc. is obtained according to the method described in JP-A-5-146279, JP-A-7-177896, etc.
- Aqueous solution and culture solution containing oxidized glutathione obtained by oxidizing with hydrogen oxide, an enzyme that oxidizes ascorbic acid, etc. Extract from yeast, and sterilization liquid, and the like.
- the oxidized glutathione-containing aqueous solution may be any aqueous solution containing oxidized glutathione, but is preferably an aqueous solution in which the purity of oxidized glutathione in the dissolved component is 50% or more, and more preferably 70% or more. Is more preferable.
- the aqueous solution may contain other organic solvents such as alcohols such as methanol, ethanol, isopropyl alcohol and n-propanol, and ketones such as acetone and methyl ethyl ketone.
- the water content in the aqueous solution is preferably 20% or more.
- an aqueous solution prepared by pretreating a solution of oxidized glutathione (the solution of oxidized glutathione is synonymous with the above-mentioned solution of oxidized glutathione).
- Examples of the pretreatment method include membrane treatment, gel filtration treatment, activated carbon treatment, ion exchange resin treatment, synthetic adsorption resin treatment, chelate resin treatment, solvent precipitation, etc., preferably activated carbon treatment, ion exchange resin treatment, synthetic adsorption resin treatment.
- synthetic precipitation resin treatment or ion exchange resin treatment is more preferable, and these treatment methods may be appropriately combined.
- the oxidized glutathione-containing aqueous solution is preferably an aqueous solution having a concentration of oxidized glutathione contained in the range of 50 to 700 g / L. Of these, aqueous solutions having a concentration of 100 to 400 g / L are preferable, and these are appropriately prepared, for example, by concentration.
- the water-miscible organic solvent may be any organic solvent having a property of being miscible with water.
- alcohols such as methanol, ethanol, isopropyl alcohol and n-propanol
- ketones such as acetone and methyl ethyl ketone are used.
- the synthetic adsorption resin include non-polar, porous adsorption resins, and the like.
- Diaion HP series for example, HP10, HP20, HP21, HP30, HP40, HP50, etc .; manufactured by Mitsubishi Chemical
- diamond Ion SP800 series for example, SP800, SP825, SP850, SP875, etc .; manufactured by Mitsubishi Chemical
- Diaion SP200 series for example, SP205, SP206, SP207, SP207SS, etc .; manufactured by Mitsubishi Chemical
- Amberlite XAD series for example, XAD4, XAD7HP, XAD16, XAD1600, etc .; manufactured by Rohm and Haas.
- SP207 is preferable.
- Examples of the ion exchange resin include a strong basic anion exchange resin, a weak basic anion exchange resin, a strong acid cation exchange resin, and a weak acid cation exchange resin.
- Examples of the strongly basic anion exchange resin include Diaion PA series (for example, PA306, PA312, PA412, etc .; manufactured by Mitsubishi Chemical).
- Examples of the weakly basic anion exchange resin include Diaion WA series (for example, WA10, WA20, WA30, etc .; manufactured by Mitsubishi Chemical Corporation).
- Examples of the strongly acidic cation exchange resin include Amberlite IR series (for example, 124Na, 252Na, etc .; manufactured by Organo), Dowex (for example, XUS-40232.01, etc .; manufactured by Dow Chemical Company), and the like.
- Examples of the cation exchange resin include Amberlite IRC series (for example, IRC-50, IRC-70, etc .; manufactured by Rohm & Haas).
- any amorphous amorphous material obtained by drying oxidized glutathione hexahydrate may be used. This can be confirmed by not showing a specific peak at a specific diffraction angle. Therefore, what is judged to be amorphous in the analysis by powder X-ray diffraction even if it contains a little crystal by observation using an electron microscope or the like is included in the amorphous amorphous of the present application.
- oxidized glutathione-containing aqueous solution According to the method described in JP-A-5-146279 or JP-A-7-177896, reduced glutathione, for example, an enzyme that oxidizes oxygen, hydrogen peroxide, and ascorbic acid Etc. to obtain an aqueous solution containing an oxidized glutathione, a culture solution, an extract from yeast, a sterilization solution, and the like. This can be pretreated as necessary so that the purity of the oxidized glutathione in the dissolved component is, for example, 50% or more, preferably 70% or more.
- An aqueous solution containing oxidized glutathione is obtained by concentrating the pretreated solution or the untreated solution so that the concentration of oxidized glutathione is, for example, 50 to 700 g / L, preferably 100 to 400 g / L. .
- an oxidized glutathione-containing aqueous solution can be obtained by converting a pretreated solution or an untreated solution into a powder by freeze-drying and dissolving the obtained powder in water so as to have a similar concentration.
- commercially available oxidized glutathione may be used as the powder.
- Examples of pretreatment methods for obtaining an oxidized glutathione-containing aqueous solution include membrane treatment, gel filtration treatment, activated carbon treatment, ion exchange resin treatment, synthetic adsorption resin treatment, chelate resin treatment (as chelate resins used for chelate resin treatment) , For example, Duolite C467; manufactured by Sumitomo Chemical Co., Ltd.), solvent precipitation, etc., preferably activated carbon treatment, ion exchange resin treatment, synthetic adsorption resin treatment, chelate resin treatment, solvent precipitation, etc.
- a synthetic adsorption resin treatment or an ion exchange resin treatment is more preferable, and these treatment methods may be appropriately combined.
- an aqueous solution containing an oxidized glutathione, a culture solution, an extract from yeast, a sterilization solution, or the like is passed through a synthetic adsorption resin, preferably SP207, and water or a water-miscible organic solvent (The water-miscible organic solvent has the same meaning as described above) alone or in combination of two or more to make an eluate, and separation or purification is performed, or an aqueous solution containing oxidized glutathione, a culture solution, or yeast extract, a sterilization solution, such as cross-linking degree of 12% or more of a strongly acidic cation exchange resin (H + form), preferably after passed through a column SK112 or SK116, further crosslinking of 4% or less of a strongly acidic cation exchange resin (H + Type), preferably through SK102 or XUS-40232.01, each of water or a water-miscible organic solvent (the water-miscible organic solvent is
- the reduced glutathione used as a raw material a commercially available product is used, or a known method (for example, Japanese Patent Publication No. 44-239, Japanese Patent Publication No. 46-4755, Japanese Patent Publication No. 46-2838, or Japanese Patent Publication No. Sho 61-61). According to the method described in JP-74595), an aqueous solution containing a reduced glutathione obtained by a synthesis method, a fermentation method, or an extraction method from yeast, a purified solution, or a lyophilized powder can be used. 2.
- the oxidized glutathione-containing aqueous solution obtained in (1) is adjusted with hydrochloric acid or sulfuric acid, or a sodium hydroxide aqueous solution, if necessary, so that the pH value becomes, for example, 2.5 to 3.5, and then the aqueous solution is ⁇ 20
- Cooling crystallization is carried out by standing or stirring at a temperature between -15 ° C, preferably 0-10 ° C for 1 minute to 48 hours, more preferably 1-24 hours. Crystallization can be similarly achieved by lowering the temperature to 1 minute to 48 hours, preferably 1 to 24 hours.
- crystals of oxidized glutathione hexahydrate can also be precipitated by adding or dropping a solvent selected from alcohols and ketones to an oxidized glutathione-containing aqueous solution during cooling crystallization.
- a solvent selected from alcohols and ketones include ethanol, propanol, n-propanol, and isopropyl alcohol
- examples of the ketone solvent include acetone and methyl ethyl ketone.
- the amount of the solvent added is 0.1 to 100 times, preferably 0.1 to 10 times, and more preferably 0.1 to 3 times that of the oxidized glutathione-containing aqueous solution 1.
- the above amount of the solvent can be dropped over 1 minute to 10 hours, preferably 1 to 7 hours.
- seed crystals may be added as necessary, regardless of whether a solvent is added or added dropwise.
- the seed crystal can be added to a concentration of 0.001 to 50 g / L, preferably 0.01 to 5 g / L.
- the final concentration should be added to the above concentration. Can do.
- the precipitated crystals are separated using, for example, centrifugal filtration, decantation, etc., and after washing the crystals with water or a water-miscible organic solvent, the crystals obtained under reduced pressure or ventilation are dried to obtain oxidized glutathione / Hexahydrate crystals can be obtained. Further, it can be further purified by performing operations such as washing, drying and recrystallization.
- Oxidized glutathione hexahydrate crystals obtained by the above production method may be obtained as adducts with various water-miscible organic solvents, but these adducts with various water-miscible organic solvents are also crystals of the present application. Contained in
- the oxidized glutathione hexahydrate crystals obtained by the above production method may have different crystal forms or different particle sizes, and these may be obtained alone or as a mixture. However, these different crystal forms or different particle sizes, alone or as a mixture, are also included in the crystals of the present application. 3.
- Method for producing non-crystalline amorphous of oxidized glutathione The oxidized glutathione hexahydrate crystals obtained in (1) above were dried with a dryer at a temperature of 40 to 90 ° C., preferably 50 to 80 ° C., more preferably 60 to 70 ° C. Amorphous amorphous can be produced. The drying time can be appropriately determined according to the drying temperature and the amount of crystals of oxidized glutathione hexahydrate, and the drying can be performed while confirming that the crystals are transformed into amorphous amorphous.
- the dryer is not particularly limited as long as it can efficiently dry the oxidized glutathione crystals in an amount to be dried.
- a conical dryer, a box-type shelf dryer, a box-type hot air dryer Examples thereof include a fluidized bed dryer and a band dryer, and a conical dryer is preferable.
- the drying efficiency can be increased by reducing the pressure inside the dryer during drying.
- oxidized glutathione hexahydrate crystals are filled into a conical dryer and dried at 60 ° C. under reduced pressure (40 mmHg) for 12 hours to obtain an oxidized glutathione amorphous amorphous. it can.
- oxidized glutathione 55.5 L, oxidized glutathione-containing concentration: 14.4 g / L.
- This sterilization solution is passed through Diaion SK116 (22L) and then passed through Dowex XUS-40232.01 (13L) to adsorb oxidized glutathione, and an aqueous ammonia solution (20 L, concentration: 2 mol / L).
- oxidized glutathione 55.5 L, oxidized glutathione-containing concentration: 14.4 g / L.
- This sterilization solution is passed through Diaion SK116 (22L) and then passed through Dowex XUS-40232.01 (13L) to adsorb oxidized glutathione, and an aqueous ammonia solution (20 L, concentration: 2 mol / L).
- the eluate was passed through Diaion SK116 (7 L) to make it free and ammonia was removed to obtain an oxidized glutathione-containing aqueous solution (19 L, oxidized glutathione-containing concentration: 35.4 g / L).
- Activated carbon 130 g was added to the aqueous solution and stirred at 40 ° C. for 1 hour, and then the activated carbon was removed by filtration.
- the obtained filtrate was concentrated to 2.24 L (oxidized glutathione-containing concentration: 300 g / L), and then cooled to 5 ° C.
- Crystals (13 g) obtained according to the method described in Example 1 were added as seed crystals to the concentrated solution, and then methanol (4.6 L) was added over 5 hours for crystallization. The precipitated crystals were separated by filtration and dried by ventilation to obtain oxidized glutathione hexahydrate crystals (610 g).
- Amorphous Amorphous Glutathione Hexahydrate Crystal (15.0 g) obtained in Example 3 was charged into a conical drier and heated at 60 ° C. under reduced pressure (40 mmHg). After drying for a while, oxidized glutathione amorphous amorphous (12.7 g) was obtained.
- Reference example 1 Acquisition of freeze-dried oxidized glutathione powder 4.8 g of reduced glutathione obtained according to the method described in JP-A-5-146279 was dissolved in water (24 mL), and the resulting aqueous solution containing reduced glutathione was added to water.
- the reaction solution was passed through Diaion SK116 (32 mL) and Duolite C467 (4 mL, manufactured by Sumitomo Chemical Co., Ltd.), the treatment solution was concentrated, and an oxidized glutathione-containing aqueous solution (11 mL, oxidized glutathione-containing concentration: 300 g). / L). This aqueous solution was freeze-dried to obtain 3.0 g of freeze-dried powder of oxidized glutathione.
- the present invention provides a non-crystalline amorphous form of oxidized glutathione that is useful as a product, raw material or intermediate for health foods, pharmaceuticals, cosmetics and the like, and a method for producing the same.
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Abstract
Description
また、酸化型グルタチオン8水和物の結晶は、結晶中に含有される水含量が一定せず、安定性が悪い点、結晶を取得するのに3-4日間という長期間を要する点が問題であり、酸化型グルタチオン1水和物の結晶は、針状結晶であり凝集しやすいため結晶分離性が悪いという点、不純物の淘汰性(精製能力)が悪い点、および結晶成長速度が遅い点において改善の余地があることが知られている。
(1)酸化型グルタチオン・6水和物の結晶を40~90℃の温度で乾燥することを特徴とする酸化型グルタチオンの非結晶アモルファスの製造方法。
(2)酸化型グルタチオン・6水和物の結晶が粉末X線回折において、回折角(2θ)が、8.12°、9.70°、10.62°、12.44°、14.20°、16.22°、16.38°、17.90°、18.90°、19.52°、20.26°、21.32°、21.60°、22.82°、23.34°、24.40°24.72°、24.98°、25.56°、26.18°、26.68°、27.20°、28.32°、29.00°、29.66°、31.02°、31.58°、32.20°、32.72°、32.88°、34.48°および41.56°にピークを有する酸化型グルタチオン・6水和物の結晶である上記(1)の酸化型グルタチオンの非結晶アモルファスの製造方法。
(3)酸化型グルタチオン・6水和物の結晶が、酸化型グルタチオン含有水溶液を15℃以下に冷却することにより酸化型グルタチオン・6水和物の結晶を析出させた後、該水溶液から酸化型グルタチオン・6水和物の結晶を採取することにより製造されることを特徴とする上記(1)または(2)の酸化型グルタチオンの非結晶アモルファスの製造方法。
(4)酸化型グルタチオン・6水和物の結晶が、15℃以下の酸化型グルタチオン含有水溶液にアルコール類およびケトン類からなる群より選ばれる溶媒を添加または滴下する工程を含む製造方法により製造されることを特徴とする上記(1)または(2)の酸化型グルタチオンの非結晶アモルファスの製造方法。
(5)酸化型グルタチオン・6水和物の結晶が、15℃以下の酸化型グルタチオン含有水溶液にメタノール、エタノール、n-プロパノールおよびイソプロピルアルコールからなる群より選ばれる溶媒を添加または滴下する工程を含む製造方法により製造されることを特徴とする上記(1)または(2)の酸化型グルタチオンの非結晶アモルファスの製造方法。
(6)酸化型グルタチオン・6水和物の結晶が、15℃以下の酸化型グルタチオン含有水溶液にメタノールを添加または滴下する工程を含む製造方法により製造されることを特徴とする上記(1)または(2)の酸化型グルタチオンの非結晶アモルファスの製造方法。
(7)酸化型グルタチオン含有水溶液が、酸化型グルタチオンを含有する溶液を合成吸着樹脂処理またはイオン交換樹脂処理することにより得られる水溶液である上記(3)~(6)のいずれかの酸化型グルタチオンの非結晶アモルファスの製造方法。
(8)上記(1)~(7)のいずれかの製造方法により得られる酸化型グルタチオンの非結晶アモルファス。
また、酸化型グルタチオン含有水溶液としては、含有される酸化型グルタチオンの濃度が50~700g/Lである水溶液が好ましい。中でも100~400g/Lである水溶液が好ましく、これらは、適宜例えば濃縮等により調製される。
合成吸着樹脂としては、例えば非極性で多孔質の吸着樹脂等があげられ、具体的にはダイヤイオンHPシリーズ(例えば、HP10、HP20、HP21、HP30、HP40、HP50等;三菱化学製)、ダイヤイオンSP800シリーズ(例えば、SP800、SP825、SP850、SP875等;三菱化学製)、ダイヤイオンSP200シリーズ(例えば、SP205、SP206、SP207、SP207SS等;三菱化学製)、アンバーライトXADシリーズ(例えば、XAD4、XAD7HP、XAD16、XAD1600等;ローム アンド ハース社製)等があげられる。中でも、SP207が好ましい。
強塩基性アニオン交換樹脂としては、例えばダイヤイオンPAシリーズ(例えば、PA306、PA312、PA412等;三菱化学製)等があげられ、弱塩基性アニオン交換樹脂としては、例えばダイヤイオンWAシリーズ(例えば、WA10、WA20、WA30等;三菱化学製)等があげられる。
1.酸化型グルタチオン含有水溶液の調製
特開平5-146279号公報、または特開平7-177896号公報等に記載の方法に準じて、還元型グルタチオンを、例えば酸素、過酸化水素、アスコルビン酸を酸化する酵素等で酸化し、酸化型グルタチオンを含有する水溶液、培養液、酵母からの抽出液、除菌液等を得る。これを溶解成分中の酸化型グルタチオンの純度が例えば50%以上、好ましくは70%以上になるように必要に応じて前処理に付すことができる。
2.酸化型グルタチオン・6水和物の結晶の製造方法
1.で得られた酸化型グルタチオン含有水溶液を、必要に応じて塩酸もしくは硫酸、または水酸化ナトリウム水溶液等でpH値が例えば2.5~3.5となるように調整した後、該水溶液を-20~15℃、好ましくは0~10℃の間の温度に1分間~48時間、より好ましくは1~24時間静置または攪拌することにより冷却晶析を行う。また当該温度に1分間~48時間、好ましくは1~24時間かけて下げることでも同様に晶析することができる。
アルコール類の溶媒としては、エタノール、プロパノール、n-プロパノールおよびイソポロピルアルコール等をあげることができ、ケトン類の溶媒としては、アセトンおよびメチルエチルケトン等をあげることができる。
冷却晶析を行う際、溶媒を添加または滴下するしないにかかわらず、必要に応じて種晶を添加してもよい。種晶の添加量としては0.001~50g/L、好ましくは0.01~5g/Lの濃度になるように添加でき、滴下する場合は最終濃度が上記の濃度になるように滴下することができる。
上記製造方法で得られる酸化型グルタチオン6水和物の結晶は、各種水混和性有機溶媒との付加物として得られることもあるが、これら各種水混和性有機溶媒との付加物も本願の結晶に含有される。
3.酸化型グルタチオンの非結晶性アモルファスの製造方法
2.で得られた酸化型グルタチオン・6水和物の結晶を、乾燥機で40~90℃、好ましくは50~80℃、より好ましくは60~70℃の温度で乾燥することにより、酸化型グルタチオンの非結晶性アモルファスを製造することができる。乾燥時間は乾燥温度、酸化型グルタチオン・6水和物の結晶の量に従って適宜決めることができ、結晶が非結晶アモルファスに転移することを確認しながら乾燥を行えばよい。
参考例1で得られた酸化型グルタチオン凍結乾燥粉末(3.0g)を水に溶解し、酸化型グルタチオン含有水溶液(30mL、酸化型グルタチオン含有濃度:100g/L)を調製した。この水溶液を5℃で48時間静置して、結晶を析出させた。析出した結晶を濾過により分離して、通風乾燥することにより酸化型グルタチオン・6水和物の結晶(1.0g)を得た。なお、該結晶が6水和物であることは、単結晶X線構造解析によっても確認した。
水和数:6水和物
融点:191℃
粉末X線回折[回折角(2θ°)、()内は相対強度比(I/I0)を示す]:8.12°(100)、9.70°(33)、10.62°(43)、12.44°(14)、14.20°(13)、16.22°(71)、16.38°(22)、17.90°(18)、18.90°(9)、19.52°(76)、20.26°(17)、21.32°(13)、21.60°(22)、22.82°(41)、23.34°(26)、24.40°(34)、24.72°(23)、24.98°(33)、25.56°(12)、26.18°(18)、26.68°(34)、27.20°(9)、28.32°(12)、29.00°(13)、29.66°(11)、31.02°(10)、31.58°(10)、32.20°(9)、32.72°(11)、32.88°(12)、34.48°(18)および41.56°(13)
上記で得られた酸化型グルタチオン・6水和物の飽和溶解度を酸化型グルタチオン・1水和物と比較した結果を表1に示す。
参考例1で得られた酸化型グルタチオン凍結乾燥粉末(10.0g)を水に溶解し、酸化型グルタチオン含有水溶液(33mL、酸化型グルタチオン含有濃度:300g/L)を調製した。この水溶液を5℃に冷却し、実施例1で得られた結晶(0.1g)を種晶として添加した。この溶液にメタノール(66mL)を5時間かけて添加し、晶析を行った。晶析液を1時間熟成した後、析出した結晶を濾過により分離して、通風乾燥することにより酸化型グルタチオン・6水和物の結晶(8.5g)を得た。
特開昭61-74595号公報の実施例2に記載の方法に準じて得られた還元型グルタチオンを含有する水溶液を、特開平5-146279号公報に記載の方法に準じて、水酸化ナトリウム水溶液でpH7.5に調整した後、系内に酸素を吹き込んで酸化し、酸化型グルタチオン含有水溶液(48.1L、酸化型グルタチオン含有濃度:18.0g/L)を得た。
実施例3で得られた酸化型グルタチオン・6水和物の結晶(15.0g)をコニカル型乾燥機に充填し、60℃、減圧下(40mmHg)で12時間乾燥し、酸化型グルタチオン非結晶アモルファス(12.7g)を取得した。
参考例1
酸化型グルタチオン凍結乾燥粉末の取得
特開平5-146279号公報に記載の方法に準じて得られた還元型グルタチオン4.8gを水(24mL)に溶解し、得られた還元型フルタチオン含有水溶液を水酸化ナトリウム水溶液でpH7.5に調整した後、硫酸銅存在下で攪拌した。反応液をダイヤイオンSK116(32mL)およびデュオライトC467(4mL、住友化学工業(株)製)に通塔し、処理液を濃縮して酸化型グルタチオン含有水溶液(11mL、酸化型グルタチオン含有濃度:300g/L)を得た。この水溶液を凍結乾燥して、酸化型グルタチオンの凍結乾燥粉末3.0gを得た。
Claims (8)
- 酸化型グルタチオン・6水和物の結晶を40~90℃の温度で乾燥することを特徴とする酸化型グルタチオンの非結晶アモルファスの製造方法。
- 酸化型グルタチオン・6水和物の結晶が粉末X線回折において、回折角(2θ)が、8.12°、9.70°、10.62°、12.44°、14.20°、16.22°、16.38°、17.90°、18.90°、19.52°、20.26°、21.32°、21.60°、22.82°、23.34°、24.40°24.72°、24.98°、25.56°、26.18°、26.68°、27.20°、28.32°、29.00°、29.66°、31.02°、31.58°、32.20°、32.72°、32.88°、34.48°および41.56°にピークを有する酸化型グルタチオン・6水和物の結晶である請求項1に記載の酸化型グルタチオンの非結晶アモルファスの製造方法。
- 酸化型グルタチオン・6水和物の結晶が、酸化型グルタチオン含有水溶液を15℃以下に冷却することにより酸化型グルタチオン・6水和物の結晶を析出させた後、該水溶液から酸化型グルタチオン・6水和物の結晶を採取することにより製造されることを特徴とする請求項1または2に記載の酸化型グルタチオンの非結晶アモルファスの製造方法。
- 酸化型グルタチオン・6水和物の結晶が、15℃以下の酸化型グルタチオン含有水溶液にアルコール類およびケトン類からなる群より選ばれる溶媒を添加または滴下する工程を含む製造方法により製造されることを特徴とする請求項1または2に記載の酸化型グルタチオンの非結晶アモルファスの製造方法。
- 酸化型グルタチオン・6水和物の結晶が、15℃以下の酸化型グルタチオン含有水溶液にメタノール、エタノール、n-プロパノールおよびイソプロピルアルコールからなる群より選ばれる溶媒を添加または滴下する工程を含む製造方法により製造されることを特徴とする請求項1または2に記載の酸化型グルタチオンの非結晶アモルファスの製造方法。
- 酸化型グルタチオン・6水和物の結晶が、15℃以下の酸化型グルタチオン含有水溶液にメタノールを添加または滴下する工程を含む製造方法により製造されることを特徴とする請求項1または2に記載の酸化型グルタチオンの非結晶アモルファスの製造方法。
- 酸化型グルタチオン含有水溶液が、酸化型グルタチオンの溶液を合成吸着樹脂処理またはイオン交換樹脂処理することにより得られる水溶液である請求項3~6のいずれか1項に記載の酸化型グルタチオンの非結晶アモルファスの製造方法。
- 請求項1~7のいずれか1項に記載の製造方法により得られる酸化型グルタチオンの非結晶アモルファス。
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JPH05146279A (ja) | 1991-11-26 | 1993-06-15 | Kyowa Hakko Kogyo Co Ltd | グルタチオン含有飲料 |
JPH06174595A (ja) | 1992-12-09 | 1994-06-24 | Showa Shell Sekiyu Kk | 動弁系摩耗試験装置 |
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WO2003035674A1 (fr) * | 2001-10-25 | 2003-05-01 | Kyowa Hakko Kogyo Co., Ltd. | Cristal de glutathione oxydee et son procede de production |
WO2008047792A1 (fr) * | 2006-10-16 | 2008-04-24 | Kyowa Hakko Bio Co., Ltd. | Cristal de glutathione et son procédé de fabrication |
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JPS6174595A (ja) | 1984-09-21 | 1986-04-16 | Kyowa Hakko Kogyo Co Ltd | 物質の製造方法 |
JPH05146279A (ja) | 1991-11-26 | 1993-06-15 | Kyowa Hakko Kogyo Co Ltd | グルタチオン含有飲料 |
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