WO2009130895A1 - フコキサンチンの製造方法およびそれに用いる微細藻類 - Google Patents
フコキサンチンの製造方法およびそれに用いる微細藻類 Download PDFInfo
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- WO2009130895A1 WO2009130895A1 PCT/JP2009/001837 JP2009001837W WO2009130895A1 WO 2009130895 A1 WO2009130895 A1 WO 2009130895A1 JP 2009001837 W JP2009001837 W JP 2009001837W WO 2009130895 A1 WO2009130895 A1 WO 2009130895A1
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- WO
- WIPO (PCT)
- Prior art keywords
- fucoxanthin
- producing
- microalgae
- microalga
- belonging
- Prior art date
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- AQLRNQCFQNNMJA-UHFFFAOYSA-N fucoxanthin Natural products CC(=O)OC1CC(C)(C)C(=C=CC(=CC=CC(=CC=CC=C(/C)C=CC=C(/C)C(=O)CC23OC2(C)CC(O)CC3(C)C)C)CO)C(C)(O)C1 AQLRNQCFQNNMJA-UHFFFAOYSA-N 0.000 title claims abstract description 107
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- MBMBGCFOFBJSGT-KUBAVDMBSA-N all-cis-docosa-4,7,10,13,16,19-hexaenoic acid Chemical compound CC\C=C/C\C=C/C\C=C/C\C=C/C\C=C/C\C=C/CCC(O)=O MBMBGCFOFBJSGT-KUBAVDMBSA-N 0.000 claims description 6
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Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12P—FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
- C12P7/00—Preparation of oxygen-containing organic compounds
- C12P7/64—Fats; Fatty oils; Ester-type waxes; Higher fatty acids, i.e. having at least seven carbon atoms in an unbroken chain bound to a carboxyl group; Oxidised oils or fats
- C12P7/6409—Fatty acids
- C12P7/6427—Polyunsaturated fatty acids [PUFA], i.e. having two or more double bonds in their backbone
- C12P7/6434—Docosahexenoic acids [DHA]
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N1/00—Microorganisms, e.g. protozoa; Compositions thereof; Processes of propagating, maintaining or preserving microorganisms or compositions thereof; Processes of preparing or isolating a composition containing a microorganism; Culture media therefor
- C12N1/12—Unicellular algae; Culture media therefor
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12P—FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
- C12P23/00—Preparation of compounds containing a cyclohexene ring having an unsaturated side chain containing at least ten carbon atoms bound by conjugated double bonds, e.g. carotenes
Definitions
- the present invention relates to a method for producing fucoxanthin or a highly unsaturated fatty acid-containing fucoxanthin using microalgae, and a microalgae for producing the fucoxanthin. Specifically, a method for producing fucoxanthin or a fucoxanthin containing a highly unsaturated fatty acid using a microalga belonging to the Pingioriophyceae, Golden algae, Diatom, or Haptophyta, and producing the fucoxanthin For microalgae.
- Fucoxanthin is known for its antitumor effect, and its use as a pharmaceutical and health food is being studied (Patent Document 1).
- Patent Document 1 As a method for producing this fucoxanthin, methods of extracting from algae such as kombu and wakame are known (Patent Documents 2 and 3).
- brown algae belonging to large algae such as kombu and seaweed have a very slow growth rate, and it takes time and cost to obtain a practical amount.
- macroalgae have a high content of polysaccharides and the like, and the cell wall is sturdy, so there are problems in the method for extracting and producing fucoxanthin.
- Patent Document 4 a method of cultivating mozuku's discoid body was studied as a method of artificially culturing.
- the yield of fucoxanthin was as high as 1.1 g per 100 g of dry algae, but the production cost was high because the plate was difficult to handle and the culture rate was slow, so the productivity was low. There was a drawback of becoming.
- Polyunsaturated fatty acids such as eicosapentaenoic acid are used for pharmaceuticals, health foods and the like because of their useful physiological activities, but many are extracted from fish and the like. It is manufactured by a method requiring complicated extraction, purification, etc. (Patent Document 5).
- the present invention aims at efficient collection of fucoxanthin or highly unsaturated fatty acid-containing fucoxanthin, and a method for producing fucoxanthin or highly unsaturated fatty acid-containing fucoxanthin using microalgae, and producing the fucoxanthin It is an object to provide microalgae for the purpose. More specifically, a method for producing fucoxanthin or a fucoxanthin containing a highly unsaturated fatty acid using a microalga belonging to the Pingioriophyceae, Golden algae, diatom, or haptophyceae, and producing the fucoxanthin It is an object to provide microalgae for the purpose.
- microalgae produce fucoxanthin and the culture rate (growth rate), and as a result of earnest search for microalgae with a large amount of fucoxanthin production, Pingioophyceae, Golden algae,
- the inventors have found that a microalga belonging to the diatom class or the hapto class is capable of producing a large amount of fucoxanthin, and completed the present invention.
- the gist of the present invention is a method for producing fucoxanthin using microalgae described in (1) to (7) below.
- a method for producing fucoxanthin comprising culturing a microalgae having fucoxanthin productivity of 0.5 mg / L / day or more in a medium, and extracting and separating fucoxanthin from the cultured algal bodies.
- microalga belonging to haptoglobulin Motsuna is microalga belonging to Pureurokurishisu genus (Pleurochrysis) or Pavlova sp (Pavlova), fucosyltransferase method for producing xanthine according to (3).
- this invention makes a summary the manufacturing method of the polyunsaturated fatty acid containing fucoxanthin by a micro algae as described in following (8) thru
- (8) In the method for producing fucoxanthin according to any one of (1) to (7), highly unsaturated fatty acid is collected simultaneously with collecting fucoxanthin from the culture. Method for producing fatty acid-containing fucoxanthin.
- (9) The method for producing highly unsaturated fatty acid-containing fucoxanthin according to (8), wherein the highly unsaturated fatty acid is a highly unsaturated fatty acid having 20 or more carbon atoms.
- this invention makes a summary the micro algae as described in following (11).
- (11) A microalgae having fucoxanthin productivity of 0.5 mg / L / day or more for use in the production method according to any one of (1) to (7) above.
- a method for producing fucoxanthin or a highly unsaturated fatty acid-containing fucoxanthin using microalgae, and a microalgae having a fucoxanthin productivity of 0.5 mg / L / day or more for producing the fucoxanthin Is provided. More specifically, a method for producing fucoxanthin or a fucoxanthin containing a highly unsaturated fatty acid using a microalga belonging to the Pingioriophyceae, Golden algae, diatom, or haptophyceae, and producing the fucoxanthin Therefore, a microalgae having a fucoxanthin productivity of 0.5 mg / L / day or more is provided.
- an efficient method for producing fucoxanthin, and the productivity of fucoxanthin used therefor is 0.5 mg / L / day or more, preferably 1.0 mg / L / day or more, more preferably 2.0 mg / L. Microalgae more than / day are provided, enabling mass production of fucoxanthin.
- the microalgae is a general term for very small phytoplankton that can be observed only with a microscope among organisms that perform oxygen-generating photosynthesis except moss plants, fern plants, and seed plants that mainly live on the ground.
- Examples of the microalgae used in the present invention include microalgae belonging to the Pingioriophyceae, Golden Algae, Diatoms, or Haptoalgae.
- the microalgae belonging to the Pingioeophyceae belong to the genus Pinguiochrysis, the microalgae belonging to the Phaeomonas genus or the polypodochrysis genus, the golden algae Microalgae, such as microalgae belonging to the genus Ochromonas, microalgae belonging to the genus Dinobryon, microalgae belonging to the genus Poterioochromonas or microalgae belonging to the genus Epipyxis (Epipyxis) Microalgae belonging to the genus Phaeoductylum, microalgae belonging to Cyclotella, Skeletonema, Nitzschia, or Chaetoceros
- the microalgae belonging to the haptophyceae are Pleurochrysis Ik Zante Macri cis genus (Exanthemachrysis), or Pavlova sp (Pavlov
- the present invention relates to a method for producing fucoxanthin, comprising culturing a microalgae having fucoxanthin productivity of 0.5 mg / L / day or more in a medium, and separating and extracting fucoxanthin from the cultured algal bodies.
- a method for producing fucoxanthin comprising culturing a microalgae having fucoxanthin productivity of 0.5 mg / L / day or more in a medium, and separating and extracting fucoxanthin from the cultured algal bodies.
- the productivity is about 0.1 mg / L / day.
- those having fucoxanthin productivity of 0.5 mg / L / day or more are used.
- fucoxanthin has a productivity of 0.5 mg / L / day or more, brown algae belonging to the large algae such as conventional kombu and wakame, which have a very slow growth rate, and a mozuku that is difficult to handle and has a slow culture rate.
- microalgae Compared to a disk-like body, a stable and practical amount can be obtained economically. These microalgae are easier to extract and produce than large algae, and also contain useful highly unsaturated fatty acids. Of microalgae, fucoxanthin productivity of 0.5 mg / L / day or more is economically sufficient, but is preferably 1.0 mg / L / day or more, more preferably 2.0 mg. More than / L / day is good.
- the present invention also includes culturing a microalgae having a fucoxanthin productivity of 0.5 mg / L / day or more in a medium containing an organic substance containing sugar, and separating and extracting fucoxanthin from the cultured algal cells. It is related with the manufacturing method of the fucoxanthin characterized.
- the kind of sugar used at this time is not particularly limited as long as it can grow microalgae of the genus Ochromonus.
- polysaccharides such as starch, cellulose, ⁇ 1,3-glucan, chitin and fructan
- disaccharides such as sucrose, cellobiose, maltose, trehalose and lactose
- monosaccharides such as glucose, fructose, mannose, galactose and lactose
- examples of other organic substances include glycerin and phenol.
- starch, maltose, cellobiose, or glucose is used as a carbon source, fucoxanthin can be efficiently produced, and fructose, mannose, phenol, or the like can be used as one having productivity equivalent to these.
- Pingio microalga belonging to algae rope is Pingiokurishisu pyriformis (Pinguiochrysis pyriformis), Faeomonasu parva (Phaeomonas parva) and Poripodokurishisu Teeishieri (Polypodochrysis teissieri), microalgae belonging golden algae rope is Okuromonasu Danica ( Ochromonas danica ), Ochromonas tuberculata ( Ochromonas villosa ), or Ochromonas minuta ( Ochromonas minuta ), Dinobryon cylindrical moss ( Dinobryon cylindrical ), Poterio spi glabra), such as microalgae belonging to the diatom rope is Faye Oda Cu Chi Lam Torikorunatamu (Phaeodactylum tricornutum), Shikurotera Kuriputika (Cyclotella cryptica), Shikuroter
- the medium for culturing microalgae is not particularly limited as long as microalgae can be cultured.
- artificial seawater or seawater to which nutrient salts such as nitrogen and phosphoric acid, vitamins, and trace elements are added can be used.
- cultivation is performed on light irradiation conditions, and the irradiation method can be performed by continuous irradiation and photoperiod irradiation.
- Fucoxanthin is extracted from the algae thus cultured according to a conventional method. At this time, after the centrifuged algal bodies are dried, the fucoxanthin can be extracted more easily.
- the microalgae of the genus Ochromonus can be grown on organic substances such as sugar, the algal bodies can be grown without irradiating light. It is possible to develop microalgae that grow on organic substances such as sugar in microalgae other than Ochromonas. For example, a diatom genus Nitrica can also be used.
- the present invention also relates to a method for producing fucoxanthin, which obtains 6 g / L or more of dry algae by culturing Ochromonas microalgae in a medium containing an organic substance containing sugar.
- microalgae are cultured without organic substances such as glucose
- the light transmittance is deteriorated due to the algal body density when the culture density of microalgae is 3 g / L or more. Therefore, it is necessary to increase the light intensity. Further, there is a problem that increasing the light intensity makes it difficult to control the water temperature.
- the organic matter grows as a nutrient, so that dry algae of 6 g / L or more can be easily obtained without light irradiation.
- the solvent for extracting fucoxanthin from microalgae is not particularly limited as long as fucoxanthin can be extracted, but methyl acetate, ethyl acetate, acetone, chloroform, toluene and the like can be used.
- alcohols such as methanol, ethanol, propanol, isopropanol, n-butanol, ketones such as methyl ethyl ketone and acetone, esters such as methyl acetate and ethyl acetate, organochlorine hydrocarbons such as chloroform, and aliphatic carbonization such as hexane
- Organic solvents such as hydrogen, aromatic hydrocarbons such as benzene and toluene can be used alone or in combination of two or more.
- the organic solvent can be used in a ratio of 1: 100 to 100: 1, preferably 1:50 to 50: 1, with respect to the dried microalgae.
- the extraction using the organic solvent can be performed by a conventional method.
- the temperature is 0 ° C. to 60 ° C., preferably 5 ° C. to 40 ° C. for 0.5 hours to Extraction may be performed for 100 hours, preferably 12 to 72 hours.
- stirring may be performed with an ultrasonic wave, a stirrer, or the like. Fucoxanthin can be separated and purified by using the organic solvent extract thus obtained as it is or after removing the residue, followed by ion exchange chromatography or reverse phase chromatography using a liquid high performance chromatograph.
- a mixture of a highly unsaturated fatty acid and fucoxanthin can be obtained by using the organic solvent extract without subjecting it to chromatography such as HPLC.
- the highly unsaturated fatty acid referred to here is preferably a highly unsaturated fatty acid having 20 or more carbon atoms, and particularly contains eicosapentaenoic acid, docosapentaenoic acid, docosahexaenoic acid, or a mixture thereof.
- Pinguiochrysis pyriformis MBIC10782 strain obtained from Marine Biotechnology Research Laboratories belonging to the Pingiophyceae class was cultured in IMK medium (Table 2).
- IMK medium 100 ml of IMK medium was placed in a 500 ml Erlenmeyer flask and silicocene (manufactured by Shin-Etsu Polymer Co., Ltd.) was used.
- a 1 ml glass pipette was pierced into the silicocene and aerated and stirred from the bottom of the test tube.
- This culture was carried out in a thermostatic water bath at 25 ° C., 300 ⁇ mol m ⁇ 2 S ⁇ 1 (continuous irradiation) for 7 days while controlling the pH under aeration conditions.
- the time course of the culture is shown in FIG.
- the production amount of fucoxanthin of Ochromonas danica CS-4 strain of Culture Example 1 was 0.538 mg per 0.1 g of dry alga bodies, and the productivity was 2.03 mg / L / day.
- the Fucoxanthin production amount of the Pinguiochrysis pyriformis MBIC10782 strain of Culture Example 2 was 0.640 mg per 0.1 g of dry alga bodies, and the productivity was 3.90 mg / L / day.
- the production amount of fucoxanthin of Phaeodactylum tricornutum CCAP 1052 / 1A in Culture Example 3 was 0.583 mg per 0.1 g of dry algae, and the productivity was 1.55 mg / L / day.
- the production amount of fucoxanthin of Pavlova pinguis AC19 in Culture Example 4 was 0.792 mg per 0.1 g of dry algal cells, and the productivity was 1.28 mg / L / day.
- the amount of fucoxanthin produced by the Ochromonas danica CS-4 strain of Culture Example 5 was 0.428 mg per 0.1 g of dry alga, and the productivity was 4.29 mg / L / day.
- the amount of fucoxanthin produced by the Ochromonas danica CS-4 strain in Example 6 of culture was 0.409 mg per 0.1 g of dry algae, and the productivity was 3.98 mg / L / day.
- methanolysis was performed by adding 5% hydrogen chloride methanol to the extract of Pinguiochrysis pyriformis MBIC10782 strain and reacting at 90 ° C. for 2 hours.
- the fatty acid methyl ester was extracted with hexane, concentrated with nitrogen gas, and analyzed by gas chromatography (GC17A; manufactured by Shimadzu Corporation).
- GC17A gas chromatography
- an efficient method for producing fucoxanthin, and the productivity of fucoxanthin used therefor is 0.5 mg / L / day or more, preferably 1.0 mg / L / day or more, more preferably 2.0 mg / L.
- Microalgae more than / day can be provided, mass production of fucoxanthin is possible, and highly unsaturated fatty acid-containing fucoxanthin can be obtained without requiring complicated purification means.
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Abstract
Description
(1)フコキサンチンの生産性が0.5mg/L/日以上の微細藻類を培地で培養し、その培養藻体からフコキサンチンを抽出、分離することを特徴とする、フコキサンチンの製造方法。
(2)培地が糖を含む有機物を含有する培地である(1)に記載のフコキサンチンの製造方法。
(3)微細藻類がピンギオ藻綱、黄金色藻綱、珪藻綱、またはハプト藻綱に属する微細藻類である、(1)または(2)に記載のフコキサンチンの製造方法。
(4)ピンギオ藻綱に属する微細藻類がピンギオクリシス属(Pinguiochrysis)に属する微細藻類である、(3)に記載のフコキサンチンの製造方法。
(5)黄金色藻綱に属する微細藻類がオクロモナス属(Ochromonas)に属する微細藻類である、(3)に記載のフコキサンチンの製造方法。
(6)珪藻綱に属する微細藻類がファエオダクチラム属(Phaeoductylum)に属する微細藻類である、(3)に記載のフコキサンチンの製造方法。
(7)ハプト藻綱に属する微細藻類がプレウロクリシス属(Pleurochrysis)またはパブロバ属(Pavlova)に属する微細藻である、(3)に記載のフコキサンチンの製造方法。
(8)(1)ないし(7)のいずれか一項に記載のフコキサンチンの製造方法において、培養物からフコキサンチンを採取すると同時に高度不飽和脂肪酸を採取することを特徴とする、高度不飽和脂肪酸含有フコキサンチンの製造方法。
(9)高度不飽和脂肪酸が炭素数20以上の高度不飽和脂肪酸である、(8)に記載の高度不飽和脂肪酸含有フコキサンチンの製造方法。
(10)高度不飽和脂肪酸がエイコサペンタエン酸、ドコサペンタエン酸、およびドコサヘキサエン酸のうちの少なくとも1種である、(9)に記載の高度不飽和脂肪酸含有フコキサンチンの製造方法。
(11)上記(1)ないし(7)のいずれか一項に記載の製造方法に用いるためのフコキサンチンの生産性が0.5mg/L/日以上の微細藻類。
本発明で用いる微細藻類としては、ピンギオ藻綱、黄金色藻綱、珪藻綱、またはハプト藻綱に属する微細藻類が挙げられる。より具体的には、ピンギオ藻綱に属する微細藻類がピンギオクリシス属(Pinguiochrysis)に属する微細藻類、ファエオモナス属(Phaeomonas)に属する微細藻類またはポリポドクリシス属(Polypodochrysis)に属する微細藻類、黄金色藻綱に属する微細藻類がオクロモナス属(Ochromonas)に属する微細藻類、サヤツナギ属(Dinobryon)に属する微細藻類、ポテリオオクロモナス属(Poterioochromonas)に属する微細藻類またはエピピクシス属(Epipyxis)に属する微細藻類など、珪藻綱に属する微細藻類がファエオダクチラム属(Phaeoductylum)に属する微細藻類、シクロテラ属(Cyclotella)に属する微細藻類、スケルトネマ属(Skeletonema)、ニッチア属(Nitzschia)、またはキートセラス属(Chaetoceros)に属する微細藻など、ハプト藻綱に属する微細藻類がプレウロクリシス属(Pleurochrysis)、イクザンテマクリシス属 (Exanthemachrysis)、またはパブロバ属(Pavlova)、またはイソクリシス属(Isochrysis属)に属する微細藻類などが挙げられる。
[生産性が0.5mg/L/日以上であることの意義]
微細藻類には、フコキサンチンを生産することは、すでに知られていたが、このフコキサンチンは、光合成のための集光作用を持つ補助色素として知られていた。しかしながら、微細藻類中のフコキサンチン量を詳細に検討した研究例がなかったため、どの程度のフコキサンチンを含むのかまったく知られていなかった(高市真一編「カロテノイド」2006年4月、p.10-48)
海藻からフコキサンチンをとる場合、食品との競合、回収の難しさ、安定生産、抽出の難しさ(多糖の存在)などがある。微細藻と同じ単位で生産性を比較するのは難しいが、ワカメの場合を例にとると、0.01mg/L/日程度になる。いずれにせよ海藻からとる場合、0.01mg/L/日以上は困難と考えられる。まず、盤状体を作成するのに、20日~30日かかる。その後、7日間培養する。この盤状体を作るのが律速になる。盤状体作成から生産するまで30日程度かかるとすると、その生産性は、0.1mg/L/日程度になる。
本発明においては、上記の微細藻類のうちフコキサンチンの生産性が0.5mg/L/日以上であるものを用いる。フコキサンチンの生産性が0.5mg/L/日以上のものを用いると、従来の成長速度が非常に遅いコンブ、ワカメなどの大型藻類に属する褐藻類や、取り扱いが難しく、培養速度が遅いモズクの盤状体などに比し、安定で、実用的な量を経済的に得ることができる。またこれら微細藻類は、大型藻類に比し抽出・生産方法が容易であり、さらに、有用な高度不飽和脂肪酸も含有するものである。
微細藻類のうち、フコキサンチンの生産性として0.5mg/L/日以上のものであれば、経済的に充分であるが、好ましくは1.0mg/L/日以上、さらに好ましくは2.0mg/L/日以上ものが良い。
また、オクロモナス属の微細藻類は、糖などの有機物で増殖することができるため光を照射しなくても藻体を増殖させることができる。オクロモナス属以外微細藻類で糖などの有機物で生育する微細藻類への展開も可能である。例えば、珪藻綱のニッチア属なども用いることができる。
また本発明は、オクロモナス属の微細藻類を、糖を含む有機物を含有する培地で培養することにより、6g/L以上の乾燥藻体の乾燥藻を得るフコキサンチンの製造方法に関する。通常、グルコースなどの有機物なしで微細藻類を培養すると微細藻類の培養密度が3g/L以上になると藻体密度により光の透過性が悪くなるため、光強度を高める必要がある。また、光強度をあげると水温の制御が困難になるなどの問題がある。有機物で培養すると有機物を栄養として増殖するので光照射をすることなしに6g/L以上の乾燥藻体を容易に得ることができる。
黄金色藻の培養
黄金色藻綱に属するOchromonas danica CS-4株(国立環境研究所微生物系統保存施設から入手)を、JM培地(表1)にて培養した。培養は、500ml三角フラスコに200mlのJM培地を入れて恒温水槽中、25℃、300μmol m-2 S-1(明期14時間、暗期10時間)にて7日間培養した。
ピンギオ藻の培養
ピンギオ藻綱に属するPinguiochrysis pyriformis MBIC10782株(海洋バイオテクノロジー研究所から入手)は、IMK培地(表2)にて培養した。培養は、500ml三角フラスコに100mlのIMK培地を入れシリコセン(信越ポリマー社製)をし、1mlのガラスピペットをシリコセンに突き刺して試験管底部から通気撹拌した。この培養は恒温水槽中、25℃、300μmol m-2 S-1(連続照射)、通気条件下pHをコントロールしながら7日間行った。培養の経時変化を図1に示す。
珪藻の培養
珪藻綱に属するPhaeodactylum tricornutum CCAP 1052/1A株 (Culturecollection of algae and protozoa から購入)は、f/2 + Si培地(表3)にて培養した。培養は、500ml三角フラスコに200mlのJM培地を入れて恒温水槽中、25℃、300μmol m-2 S-1(明期14時間、暗期10時間)にて8日間培養した。
ハプト藻の培養
ハプト藻綱に属するPavlova pinguis AC19株 ( Microalgal Culture Collection University of Caen Basse-Normandieから購入)は、IMK培地(表2)にて培養した。培養は、500ml三角フラスコに200mlのJM培地を入れて恒温水槽中、25℃、300μmol m-2 S-1(明期14時間、暗期10時間)にて10日間培養した。
可溶性でんぷんを基質とした黄金色藻の培養
黄金色藻綱に属するOchromonas danica CS-4株(国立環境研究所微生物系統保存施設から入手)を、OA30S培地(表4)にて培養した。培養は、500ml三角フラスコに100mlの0A30S培地を入れて、25℃、300μmol m-2 S-1(明期14時間、暗期10時間)にて7日間培養した。
グルコースを基質とした黄金色藻の培養
黄金色藻綱に属するOchromonas danica CS-4株(国立環境研究所微生物系統保存施設から入手)を、OA30G培地(表4)にて培養した。培養は、500ml三角フラスコに100mlの0A30G培地を入れて振盪培養機(高崎科学)で25℃,100rpmで3日間、暗状態で培養後、25℃、300μmol m-2 S-1(明期14時間、暗期10時間)にて4日間培養した。
フコキサンチンの抽出および定量
培養例1、2、3、及び4の培養液100mlをそれぞれ遠心分離し上清を除去した後、沈降した藻体を取り出して凍結乾燥機(富士医科産業社製)にて凍結乾燥した。この結果、乾燥藻体を0.264g(培養例1)および0.427g(培養例2)、0.213g(培養例3)、0.162g(培養例4)、0.702g(培養例5)、0.681g(培養6)を得た。次に、それぞれの乾燥藻体0.1gに3mlのアセトンを加えボルティックスミキサーでよく撹拌し、フコキサンチンを抽出した。この抽出液をマイショリディスクH-13-5(東ソー社製)を用いて残渣を除いた後減圧濃縮し、定量用サンプルとした。フコキサンチンの定量は、TSKgel-ODS80Ts(東ソー社製、直径4.6mm×150mm)による高速液体クロマトグラフィー(SCL 10A:470nm;島津製作所社製,流速1.0m/分)により行い、フコキサンチン生産量、および数1に示される計算式を用いて生産性を求めた。なお、フコキサンチンの標準試薬は、和光純薬工業社製のフコキサンチンを用いた。
Claims (11)
- フコキサンチンの生産性が0.5mg/L/日以上の微細藻類を培地で培養し、その培養藻体からフコキサンチンを分離、抽出することを特徴とする、フコキサンチンの製造方法。
- 培地が糖を含む有機物を含有する培地である請求項1に記載のフコキサンチンの製造方法。
- 微細藻類がピンギオ藻綱、黄金色藻綱、珪藻綱、またはハプト藻綱に属する微細藻類である、請求項1または2に記載のフコキサンチンの製造方法。
- ピンギオ藻綱に属する微細藻類がピンギオクリシス属(Pinguiochrysis)に属する微細藻類である、請求項3に記載のフコキサンチンの製造方法。
- 黄金色藻綱に属する微細藻類がオクロモナス属(Ochromonas)に属する微細藻類である、請求項3に記載のフコキサンチンの製造方法。
- 珪藻綱に属する微細藻類がファエオダクチラム属(Phaeoductylum)に属する微細藻類である、請求項3に記載のフコキサンチンの製造方法。
- ハプト藻綱に属する微細藻類がプレウロクリシス属(Pleurochrysis)またはパブロバ属(Pavlova)に属する微細藻である、請求項3に記載のフコキサンチンの製造方法。
- 請求項1ないし7のいずれか一項に記載のフコキサンチンの製造方法において、培養物からフコキサンチンを採取すると同時に高度不飽和脂肪酸を採取することを特徴とする、高度不飽和脂肪酸含有フコキサンチンの製造方法。
- 高度不飽和脂肪酸が炭素数20以上の高度不飽和脂肪酸である、請求項8に記載の高度不飽和脂肪酸含有フコキサンチンの製造方法。
- 高度不飽和脂肪酸がエイコサペンタエン酸、ドコサペンタエン酸、およびドコサヘキサエン酸のうちの少なくとも1種である、請求項9に記載の高度不飽和脂肪酸含有フコキサンチンの製造方法。
- 請求項1ないし7のいずれか一項に記載の製造方法に用いるためのフコキサンチンの生産性が0.5mg/L/日以上である微細藻類。
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JP2017012135A (ja) * | 2015-07-06 | 2017-01-19 | 国立大学法人高知大学 | ベクター、遺伝子組み換え海産珪藻及びフコキサンチンの生成方法 |
CZ307626B6 (cs) * | 2014-12-31 | 2019-01-23 | Ecofuel Laboratories S.R.O. | Způsob kultivace kmenů mikrořas |
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WO2012047120A1 (en) * | 2010-10-06 | 2012-04-12 | Photonz Corporation Limited | Heterotrophic microbial production of xanthophyll pigments |
JP2013192515A (ja) * | 2012-03-21 | 2013-09-30 | Lion Corp | 牡蠣エキス |
CZ307626B6 (cs) * | 2014-12-31 | 2019-01-23 | Ecofuel Laboratories S.R.O. | Způsob kultivace kmenů mikrořas |
WO2016175670A1 (en) * | 2015-04-29 | 2016-11-03 | Uniwersytet Jagiellonski | A process of isolation and purification of diatoxanthin and diadinoxanthin |
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WO2020174019A1 (de) * | 2019-02-26 | 2020-09-03 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Verfahren zum erhalt von fucoxanthin und fettsäuren aus algenbiomasse |
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JP7482145B2 (ja) | 2019-02-26 | 2024-05-13 | フラウンホファー ゲセルシャフト ツール フェールデルンク ダー アンゲヴァンテン フォルシュンク エー.ファオ. | 藻類バイオマスからフコキサンチン及び脂肪酸を得る方法 |
JP2021013313A (ja) * | 2019-07-10 | 2021-02-12 | オーピーバイオファクトリー株式会社 | 新規微細藻類 |
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