WO2021066113A1 - 細胞培養用組成物の製造方法、それにより得られる細胞培養用組成物及びそれを用いた細胞培養方法 - Google Patents
細胞培養用組成物の製造方法、それにより得られる細胞培養用組成物及びそれを用いた細胞培養方法 Download PDFInfo
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Definitions
- the present invention relates to a method for producing a cell culture composition, a cell culture composition obtained thereby, and a cell culture method using the same.
- Mammalian cells are used in various research and industrial fields such as medicine, pharmacy, science and technology, agriculture, and veterinary medicine. Research has elucidated the etiology and led to the development of treatments for them. Biopharmacy and vaccines produced by cells are used for the treatment / prevention of various diseases. Furthermore, cultured cells have greatly contributed to the development of basic academic fields such as cell biology, biochemistry, genetics, physiology, and molecular biology. More recently, cultured muscle cells have been used as a cell source for "cultured meat.” The protein production efficiency of "cultured meat” is much more efficient than the production by conventional livestock breeding, and by changing the meat production from the conventional livestock breeding to the cultured meat production system, up to 99% of land use can be used.
- Medium is indispensable for culturing mammalian cells, and a large amount of medium is used for cell research.
- the medium contains various nutrients, the main ones being glucose and amino acids. These nutrients are generally derived from cereals and heterotrophic microorganisms, which also require various nutrients derived from cereals. Cultivation of grains requires a lot of chemical fertilizers and pesticides, requires a huge amount of energy, and can cause greenhouse gas (GHG) generation and environmental pollution. Conversely, grain production is greatly affected by environmental changes such as global warming and environmental pollution.
- Non-Patent Documents 1 to 3 wastewater treatment utilizing the nitrogen assimilation ability of microalgae and fixation of carbon dioxide gas generated from combustion of fossil fuels.
- Microalgae synthesize nutrients such as carbohydrates (sugars) and lipids from carbon dioxide by photosynthesis, and produce amino acids using nitrogen gas / ammonia / nitrate. Microalgae produce various nutrients by utilizing solar energy and inorganic substances. Those nutrients produced by microalgae are vigorously utilized in the energy and food industry fields. For example, lipids extracted from microalgae are expected as an alternative energy to petroleum (Non-Patent Document 4). Moreover, glucose extracted from microalgae is used as a nutrient for yeast that produces bioethanol (Non-Patent Documents 5 to 6).
- Microalgae are generally considered to be photosynthetic organisms that synthesize nutrients most efficiently with almost no residue (Non-Patent Document 11).
- Patent Documents 1 and 2 describe that extracts of microalgae can partially substitute the function of serum in cell culture.
- a synthetic medium eg, inorganic salt medium
- An object of the present invention is to establish a novel cell culture system that reduces the risk of environmental load and influence on environmental changes.
- the present inventors have conducted research and development by examining from various angles in order to solve the above problems. As a result, it was surprisingly found that cells can be cultured in a medium supplemented with nutrients extracted from microalgae (for example, a medium containing no amino acids and / or vitamins). That is, the present invention includes the following aspects.
- a cell culture composition containing algae-derived components The components are as follows: (1) A step of subjecting algae to an acid hydrolysis treatment and / or an alkali hydrolysis treatment, and (2) a step of neutralizing the hydrolysis product obtained by the above step (1).
- the composition which is obtained by a step including.
- Items 1 to 3 in which the algae are selected from the group consisting of unicellular green algae, unicellular indigo algae, unicellular red algae, unicellular axle algae, and unicellular Aosa algae network. The composition according to any one of the above.
- the algae are Chlorococcum littorale, Sticococcus sp., Chlorella vulgaris Beijerinck, Euglena glassi sul salis salis salis ), The composition according to any one of items 1 to 4, which is selected from the group consisting of Arthrospira platensis.
- the components are as follows: (1) A step of subjecting algae to an acid hydrolysis treatment and / or an alkali hydrolysis treatment, and (2) a step of neutralizing the hydrolysis product obtained by the above step (1).
- a method characterized in that it is obtained by a process comprising.
- the method according to item 8 wherein the cell is an animal cell.
- the algae are unicellular algae.
- the algae are Chlorococcum littorale, Sticococcus sp., Chlorella vulgaris Beijerinck, Euglena vulgaris spirulina glass ), The method according to any one of items 8 to 11, wherein one or more is selected from the group consisting of Arthrospira platensis. [13] The method according to any one of items 8 to 12, wherein the step (1) is carried out under pressure. [14] The method according to any one of items 8 to 13, wherein the step (1) is carried out at 60 ° C to 200 ° C.
- a method for producing a composition for cell culture Less than: (1) A step of subjecting algae to an acid hydrolysis treatment and / or an alkali hydrolysis treatment; and (2) a step of neutralizing the hydrolysis product obtained by the above step (1) to obtain an algae extract; (3) A step of mixing the algae extract with a cell culture medium, wherein the cell culture medium does not substantially contain L-glutamine.
- the production method [16]
- the cell culture medium further contains L-arginine, L-cystine, glycine, L-histidine, L-isoleucine, L-leucine, L-lysine, L-methionine, L-phenylalanine, L-serine, and the like. 15.
- the method according to any one of items 15 to 18, wherein the cell culture medium is an inorganic salt medium.
- the method according to any one of items 15 to 19, wherein the cells to be cultured are animal cells.
- the method of the present invention it is possible to easily extract nutrients necessary for cell culture from microalgae, and to provide a new cell culture system that is inexpensive and reduces the environmental load.
- DMEM Dulbecco's improved Eagle's medium supplemented with 10% fetal bovine serum and 1% penicillin / streptomycin. Glucose extraction from microalgae.
- DMEM Dulbecco's improved Eagle's medium supplemented with 10% fetal bovine serum and 1% penicillin / streptomycin. Amino acid extraction from microalgae.
- DMEM Dulbecco's improved Eagle's medium supplemented with 10% fetal bovine serum and 1% penicillin / streptomycin. Effect of glutamine and glutamic acid on mammalian cell culture.
- the data expressed the relative viable cell number calculated from the absorbance as an average ⁇ SD (n 7). Culturing mammalian cells using nutrient-deficient medium and algae extract.
- C C2C12 mouse myoblasts were cultured in glucose / amino acid-free medium with / without addition of an extract from Chlorella vulgaris (C. vulgaris).
- E C2C12 mouse myoblasts with / without the addition of extracts from Chlorellaccum littorale (C. littorale), Chlorella bulgaris (C.
- Bovine muscle tissue-derived cells with or without DMEM with or without addition of 10% fetal bovine serum (FBS), or with addition of an extract from 10% fetal bovine serum (FBS) or Chlorella vulgaris (C. vulgaris) / Cultivated in an inorganic salt culture without accompanying.
- FBS fetal bovine serum
- FBS Chlorella vulgaris
- the present invention provides a cell culture composition comprising an algae-derived component.
- the components derived from algae contained in the composition of the present invention are as follows: (1) A step of subjecting algae to an acid hydrolysis treatment and / or an alkali hydrolysis treatment, and (2) a step of neutralizing the hydrolysis product obtained by the above step (1). It is obtained by a step including.
- the present invention provides a method for producing a composition for cell culture, and the following: (1) A step of subjecting algae to an acid hydrolysis treatment and / or an alkali hydrolysis treatment; and (2) a step of neutralizing the hydrolysis product obtained by the above step (1) to obtain an algae extract; (3) A step of mixing the algae extract with a cell culture medium, wherein the cell culture medium does not substantially contain L-glutamine. including.
- the cell culture medium that can be used in the present invention further includes L-arginine, L-cystine, glycine, L-histidine, L-isoleucine, L-leucine, L-lysine, L-lysine. It can be a cell culture medium that is substantially free of one or more amino acids selected from the group consisting of methionine, L-phenylalanine, L-serine, L-threonine, L-tryptophane, L-tyrosine, and L-valine. ..
- the cell culture medium that can be used in the present invention can be a cell culture medium that is substantially free of vitamins.
- the vitamin-free cell culture media that can be used in the present invention include, for example, pantothenic acid, choline chloride, folic acid, i-inositol, niacinamide, pyridoxine, riboflavin, thiamine, and their pharmaceuticals. It may be substantially free of vitamins selected from the group consisting of acceptable salts.
- the cell culture medium that can be used in the present invention may be a cell culture medium that is substantially free of glucose, and is a cell culture medium that is substantially free of pyruvate. You may.
- substantially free means that the substance is hardly contained, but does not mean that the substance is not contained at all, for example.
- Glucose may be contained in less than 10 mg / L, which is the lower limit of quantification, and for example, amino acids (for example, L-glutamine, etc.) may be contained in less than 0.1 mg / L, which is the lower limit of quantification.
- amino acids for example, L-glutamine, etc.
- it may be contained in less than 1 ⁇ g / L, which is the lower limit of quantification.
- algae is a general term for organisms that produce oxygen by photosynthesis, excluding moss plants, fern plants, and seed plants that mainly inhabit the ground. Algae can produce oxygen and nutrients (for example, glucose and amino acids) by themselves and can grow if the environment necessary for photosynthesis is prepared.
- the present invention has been completed by finding that cells can be cultured in a medium supplemented with a composition containing a component extracted from algae.
- the algae used in one embodiment of the present invention may be "unicellular algae (also referred to as” microalgae ").
- the term "unicellular algae” refers to algae in which an individual is composed of a single cell, and also includes a single-celled algae in which a plurality of unicellular algae individuals gather to form a colony.
- green algae with chlorophyll a and b as the main pigments of chloroplasts unicellular cyanobacteria with chlorophyll d as the main pigment
- unicellular red algae with chlorophyll a and phycobilin protein as the main pigments.
- An example of single-celled algae is given.
- Chlamydomonas reinhardti Japanese name: Chlamydomonas
- Dunaliella salina Japanese name: Donariella
- Dunaliella salina Japanese name: Donariella
- Chlamydomonas reinhardtii Japanese name: Chlamydomonas reinhardtii
- Chlamydomonas reinhardtii Japanese name: Chlamydomonas reinhardtii
- Chlamydomonas reinhardtii Volvox carteri (Japanese name: Volvox), Chlamydomonas chlorococcum littorale
- Chlamydomonas hydrodiction reticleatum Japanese name: Hydrodictyon reticulatum
- Pediastrum duplex Japanese name: Chlamydomonas
- Senedesmus dimorphus Japanese names: Scenedesmus
- Chlamydomonas chlorella Chlamydomonas chlorella
- Chlamydomonas chlorella Chlamydomonas
- Examples of unicellular cyanobacteria include Acariochloris marina of the phylum Cyanobacteria, Spirulina subsalsa, and Arthrospira platensis.
- Cyanidium caldarium Japanese name: Cyanidiophyceae
- Cyanidiophyceae Cyanidiophyceae
- Cyanidiophyceae Cyanidiophyceae
- Cyanidiophyceae Cyanidiophyceae
- Cyanidiophyceae Cyanidiophyceae
- Cyanidiophyceae Cyanidiophyceae
- Cyanidiophyceae Cyanidiophyceae
- Cyanidiophyceae Cyanidiophyceae
- Cyanidiophyceae Cyanidiophyceae
- Cyanidiophyceae Cyanidiophyceae
- Cyanidiophyceae Cyanidiophyceae
- Cyanidiophyceae Cyanidiophyceae
- Cyanidiophyceae Cyanidiophyceae
- Cyanidiophyceae Cyanidiophyceae
- unicellular axle algae examples include the genus Sticococcus sp. Of the order Charales Klebsormidium of the phylum Green algae. Further, Filamentous-ulvophyte, which is a unicellular Ulvophytes algae, can be mentioned.
- the algae used in the present invention may be a genetically modified product of the above-mentioned algae, and is not limited to the above-mentioned algae.
- natural algae may be used, or algae grown by a known culture method may be used.
- the algae-derived component contained in the composition used in the present invention can be extracted by carrying out a step of subjecting the algae to an acid hydrolysis treatment and / or an alkali hydrolysis treatment.
- biopolymers such as proteins and polysaccharides are organic or inorganic with water added under heating (eg, 60 ° C. to 200 ° C., preferably 80 ° C. to 180 ° C., more preferably 90 ° C. to 150 ° C.).
- the "acid hydrolysis treatment” means a hydrolysis treatment using a strong acid
- the "alkali hydrolysis treatment” means a hydrolysis treatment using a strong alkali
- the reaction time can be adjusted according to the type, amount, or concentration of the algae used, or the pH and temperature of the reaction solution, and the reaction time can be adjusted, for example, 1. It may be carried out for ⁇ 1440 minutes, 3 to 720 minutes, 5 to 360 minutes, 5 to 120 minutes, or 5 to 30 minutes.
- only acid hydrolysis treatment may be carried out, only alkali hydrolysis treatment may be carried out, and acid hydrolysis treatment and alkali hydrolysis treatment may be carried out. Both processes may be carried out.
- the acid hydrolysis treatment and the alkali hydrolysis treatment are carried out, the acid hydrolysis treatment may be followed by the alkali hydrolysis, or the alkali hydrolysis treatment may be followed by the acid hydrolysis treatment.
- a neutralization treatment may be carried out between the acid hydrolysis treatment and the alkali hydrolysis treatment.
- the algae used in step (1) may be subjected to a drying treatment before being subjected to an acid hydrolysis treatment and / or an alkali hydrolysis treatment.
- step (1) may be carried out under pressure.
- under pressure means atmospheric pressure, that is, a pressure condition higher than 1 atm, for example, 1.1 atm or more, 1.5 atm or more, 1.8 atm or more, or 2 atm or more. It may be carried out at. For example, it may be 1.1 to 300 atm, 1.5 to 200 atm, 1.8 to 100 atm, 2 to 50 atm, for example, 2 to 20 atm.
- the pressurizing condition may be carried out by any device or method, and for example, the pressurizing condition can be realized by using an autoclave.
- the composition of the present invention is obtained by carrying out a step (step (2)) of neutralizing the hydrolyzate obtained in the step (1).
- step (2) the hydrolyzate is neutralized and can be used for cell culture.
- a basic substance or an aqueous solution thereof for example, sodium hydroxide, potassium hydroxide or an aqueous solution thereof
- a basic substance or an aqueous solution thereof for example, sodium hydroxide, potassium hydroxide or an aqueous solution thereof
- step (1) when alkaline hydrolysis is finally carried out, an acidic substance (for example, sodium hydroxide, potassium hydroxide, etc.) or an aqueous solution thereof (hydrochloric acid, sulfuric acid, trifluoroacetic acid, p-toluene) Sulfuric acid, methanesulfonic acid, etc.) may be added to neutralize.
- an acidic substance for example, sodium hydroxide, potassium hydroxide, etc.
- aqueous solution thereof hydroochloric acid, sulfuric acid, trifluoroacetic acid, p-toluene
- Sulfuric acid, methanesulfonic acid, etc. may be added to neutralize.
- compositions of the present invention are used to culture cells such as prokaryotic cells (eg, Escherichia coli, lactic acid bacteria, bacilli, cyanobacteria, etc.) and eukaryotic cells (yeast, plant cells, insect cells, animal cells, etc.), especially animal cells. Can be used for.
- prokaryotic cells eg, Escherichia coli, lactic acid bacteria, bacilli, cyanobacteria, etc.
- eukaryotic cells eukaryotic cells
- yeast plant cells, insect cells, animal cells, etc.
- the origins of mammalian cells are, for example, mice, rats, rabbits, humans. , Horses, cows, monkeys, pigs, dogs, sheep, cats, goats, etc., but not limited to these.
- it may be a primary cell collected from a living tissue, a cell that has been established, and a pluripotent stem cell (for example, ES cell, ntES cell, Muse cell, iPS cell) or a tissue stem cell (for example, ES cell, ntES cell, Muse cell, iPS cell) or tissue stem cell (for example, ES cell, ntES cell, Muse cell, iPS cell).
- a pluripotent stem cell for example, ES cell, ntES cell, Muse cell, iPS cell
- a tissue stem cell for example, ES cell, ntES cell, Muse cell, iPS cell
- tissue stem cell for example, ES cell, ntES cell, Muse cell, iPS cell
- it may be a mesenchymal stem cell) or a cell whose differentiation is induced from them.
- the composition used in the present invention may contain one or more algae-derived components, and may contain, for example, two or more algae-derived components.
- it may be a composition containing a combination of a component derived from algae containing a large amount of glucose and a component derived from algae containing a large amount of amino acids constituting a protein.
- the present invention is a method for culturing cells in a medium to which a cell culture composition containing algae-derived components is added.
- the components are as follows: (1) A step of subjecting algae to an acid hydrolysis treatment and / or an alkali hydrolysis treatment, and (2) a step of neutralizing the hydrolysis product obtained by the above step (1).
- the method for culturing cells according to the present invention is (3) a step of mixing the algae extract with a cell culture medium, wherein the cell culture medium contains L-glutamine. It may include steps, which are substantially non-existent.
- the medium to which the composition containing the algae-derived component is added may be appropriately selected depending on the type of cells to be cultured, but a medium having a buffering action is preferable, for example, phosphate buffering.
- a medium having a buffering action is preferable, for example, phosphate buffering.
- glucose and / or protein-constituting amino acids eg, L-glutamine, L-arginine, L-cystine, glycine, L-histidine, L-isoleucine, L-leucine, L-lysine, etc. It is substantially free of (one or more amino acids selected from the group consisting of L-methionine, L-phenylalanine, L-serine, L-threonine, L-tryptophane, L-tyrosine, and L-valine). May be good.
- the medium may be a liquid medium or a solid medium.
- the composition containing the algae-derived component of the present invention By adding the composition containing the algae-derived component of the present invention to the medium, nutrients necessary for cell survival (for example, glucose and proteinogenic amino acids, vitamins, etc.) are supplied, and cell culture becomes possible. ..
- the ratio of adding the composition containing the algae-derived component to the medium may be appropriately adjusted according to the type of cells to be cultured, and for example, the total volume of the medium to which the composition containing the algae-derived component is added.
- the composition containing the algae-derived component was 0.1 to 99% (v / v), 1 to 80% (v / v), 2 to 50% (v / v), and 3 to 20%. (V / v), 3 to 15%, or 3 to 12% (v / v) may be contained.
- Example 1 1. Materials and methods 1-1. Microalgae culture In this study, the green alga Chlorococcum littoral (C.littorale) (NBRC 102761), Sticococcus sp. (NBRC 102709) (Independent Chemical Corporation, Product Evaluation Technology Infrastructure Organization (NITE) ), Chiba Prefecture, Japan), Chlorella vulgaris Beijerinck (C. vulgaris) (NIES-2170) and Euglena gracilis (E. gracilis) (NIES-49) Eukaryotic microalgae and Spirulina subsalsa (S. subsalsa) (NIES-3373) and Arthrospira platensis (A.
- Microalgae were cultured in a suspension culture flask (AGC Techno Glass Co., Ltd., Shizuoka Prefecture, Japan) under continuous lighting (about 500 to 700 lux) at room temperature (25 ° C.) [Reference 1]. Phase-difference images of these microalgae were acquired by a microscope (ELIPSE TS2, Nikon Corporation, Tokyo, Japan) using software (NIS-Ellipses BR, Nikon).
- C2C12 cells were seeded in 96-well plates (AGC Techno Glass Co., Ltd., Shizuoka, Japan) at a density of 10,000 cells / well and overnight in DMEM supplemented with 10% FBS and 1% P / S. It was cultured. After culturing overnight, the medium was discarded and washed twice with phosphate buffered saline (PBS, Sigma-Aldrich). The cells were then cultured using algae extract or a nutrient-deficient medium containing / without glucose / glutamic acid. The cells to which the solution was added were incubated for 2 days.
- APC Techno Glass Co., Ltd., Shizuoka, Japan a density of 10,000 cells / well and overnight in DMEM supplemented with 10% FBS and 1% P / S. It was cultured. After culturing overnight, the medium was discarded and washed twice with phosphate buffered saline (PBS, Sigma-Aldrich). The cells were then cultured
- each solution was taken immediately prior to performing the XTT assay, 100 ⁇ L of 10% FBS and 1% P / S were added, followed by 50 ⁇ L of XTT reagent. Subsequent cell life / death discrimination tests were performed according to the protocol.
- Glucose-free DMEM Invitrogen
- glucose / glutamine-free DMEM Invitrogen
- glucose / amino acid-free DMEM United State Biological, Massachusetts, USA
- the medium used in Examples 1 and 2 had the following composition.
- Glycine 30 mg / L -L-histidine: 42 mg / L -L-isoleucine: 105 mg / L -L-leucine: 105 mg / L -L-lysine: 146 mg / L ⁇ L-Methionine: 30 mg / L -L-Phenylalanine: 66 mg / L -L-serine: 42 mg / L -L-threonine: 95 mg / L ⁇
- Inorganic salt medium By using algae extract, sugar (glucose / pyruvate), amino acids (L-arginine, L-cystine, L-glutamine, glycine, L-histidine, L-isoleucine, L-leucine, L-lysine, L-methionine, L-phenylalanine, L-serine, L-threonine, L-tryptophan, L-tyrosine, L-valine) and vitamins (pantothenic acid, choline chloride, folic acid, i-inositol, niacinamide, Pyridoxin, riboflavin, thiamine) were used to show that they could be substituted.
- amino acids L-arginine, L-cystine, L-glutamine, glycine, L-histidine, L-isoleucine, L-leucine, L-lysine, L-methionine, L-phenylalanine, L
- the concentration of glucose extracted from the littoral was 2.4 ⁇ 0.3 g / L at 10 g / L and 13.1 ⁇ 1.5 g / L at 50 g / L.
- the glucose concentration extracted from platensis was 1.9 ⁇ 0.3 g / L at 10 g / L and 10.8 ⁇ 0.6 g / L at 50 g / L (FIG. 1C). This result indicates that the glucose concentration also increased in proportion to the concentration of microalgae.
- the algae extracts contained 3-4 times more glucose than conventional mammalian culture medium (DMEM supplemented with 10% FBS and 1% P / S) (Fig. 1C).
- Amino acid extraction from microalgae DMEM contains 15 of 20 proteinogenic amino acids. These 15 amino acids are the amino acids from arginine to valine, shown on the left side of FIG.
- C.I. Amino acids in the extract from littoral were quantitatively analyzed. The concentrations of all 15 amino acids in the algal extract were lower than those in the medium (Fig. 2A).
- a 24-hour heat treatment has been used for efficient acid hydrolysis of proteins [Reference 4]. Therefore, in order to improve the extraction efficiency, amino acids were extracted using 1N sulfuric acid at 100 ° C. for 24 hours. This method increased the concentration of extracted amino acids (Fig. 2A).
- microalgae having the highest amino acid yield among the 6 species of microalgae were examined.
- C.I. The extract obtained from vulgaris was found to contain the most abundant amino acids (Fig. 2B). This result is based on C.I. Consistent with the relatively high protein concentration of vulgaris.
- most of the amino acids contained in any algae species were recovered at the same or higher amino acid concentrations as those contained in the medium for mammalian cells. Was shown (Fig. 2B).
- the initial algae concentration was increased from 10 g / L to 50 g / L in order to obtain a microalgae extract with a higher amino acid concentration.
- the concentration of each amino acid was further increased by increasing the algae concentration (Fig. 2C).
- Glutamine was not extracted by the acid hydrolysis method, but DMEM contains a large amount of glutamine (Fig. 2).
- glutamic acid was contained in the microalgae extract, but DMEM did not contain glutamic acid (Fig. 2).
- the trace amounts of glutamic acid detected in FIG. 2 appear to be derived from supplemented 10% FBS or resulting from the degradation of glutamine. Therefore, it was investigated whether glutamic acid could be used as a substitute for glutamine (surrogate) in mammalian cell culture.
- the algae extract functioned as a nutrient substitute for the culture of mammalian cells. Since the use of cereals for the production of biofuels competes with food, microalgae that do not compete with food are promising in the field [Reference 7]. This study showed the possibility of novel cell culture systems that reduce environmental impact and protect against environmental changes, as well as the potential of microalgae to replace any grain-dependent culture system. ..
- Example 2 An extract was prepared from Chlorella vulgaris Beijerinck by the method described in Example 1-2. Using DMEM or an inorganic salt medium as the medium, the effect of the chlorella-derived algae extract on the culture results of bovine muscle tissue-derived cells was investigated. The experimental method was carried out by the method described in 1-3 of Example 1. As the bovine muscle tissue-derived cells, bovine cheek muscle cells purchased from Tokyo Meat Market Co., Ltd. were treated with protease and isolated cells were used.
- Example 3 An extract was prepared from Chlorella vulgaris Beijerinck by the method described in Example 1-2. Using DMEM or an inorganic salt medium as the medium, it was investigated what kind of effect the presence or absence of chlorella-derived algae extract and the presence or absence of fetal bovine serum (FBS) had on the culture results of bovine muscle tissue-derived cells. The experimental method was carried out by the method described in 1-3 of Example 1.
- FBS fetal bovine serum
- Example 4 An extract was prepared from Chlorella vulgaris Beijerinck by the method described in Example 1-2. Using DMEM or inorganic salt medium as the medium, the presence or absence of chlorella-derived algae extract and the presence or absence of fetal bovine serum (FBS) bring about what effect the culture results of bovine muscle tissue-derived cells, especially the cell growth phase, have. I checked. The experimental method was carried out by the method described in 1-3 of Example 1.
- FBS fetal bovine serum
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Abstract
Description
前記成分が、以下:
(1)藻類を、酸加水分解処理及び/又はアルカリ加水分解処理に供する工程、及び
(2)前記工程(1)により得られる加水分解産物を、中和する工程、
を含む工程により得られることを特徴とする、組成物。
[2] 前記細胞が、動物細胞である、項目1に記載の組成物。
[3] 前記藻類が、単細胞藻類である、項目1又は2に記載の組成物。
[4] 前記藻類が、単細胞性の緑藻類、単細胞性の藍藻類、単細胞性の紅藻類、単細胞性の車軸藻類及び単細胞性のアオサ藻網からなる群から1以上選択される、項目1~3のいずれか1項に記載の組成物。
[5] 前記藻類が、クロロコックム・リトラレ(Chlorococcum littorale)、スティココックス属(Stichococcus sp.)、クロレラ・ブルカリス・ベイエリンク(Chlorella vulgaris Beijerinck)、ユーグレナ・グラシリス(Euglena gracilis)、スピルリナ・サブサルサ(Spirulina subsalsa)、アルスロスピラ・プラテンシス(Arthrospira platensis)からなる群から1以上選択される、項目1~4のいずれか1項に記載の組成物。
[6] 前記工程(1)が、加圧下において実施される、項目1~5のいずれか1項に記載の組成物。
[7] 前記工程(1)が、60℃~200℃で実施される、項目1~6のいずれか1項に記載の組成物。
[8] 藻類由来の成分を含む細胞培養用組成物を添加した培地において、細胞を培養する方法であって、
前記成分が、以下:
(1)藻類を、酸加水分解処理及び/又はアルカリ加水分解処理に供する工程、及び
(2)前記工程(1)により得られる加水分解産物を、中和する工程、
を含む工程により得られることを特徴とする、方法。
[9] 前記細胞が、動物細胞である、項目8に記載の方法。
[10] 前記藻類が、単細胞藻類である、項目8又は9に記載の方法。
[11] 前記藻類が、単細胞性の緑藻類、単細胞性の藍藻類、単細胞性の紅藻類、単細胞性の車軸藻類及び単細胞性のアオサ藻網からなる群から1以上選択される、項目8~10のいずれか1項に記載の方法。
[12] 前記藻類が、クロロコックム・リトラレ(Chlorococcum littorale)、スティココックス属(Stichococcus sp.)、クロレラ・ブルカリス・ベイエリンク(Chlorella vulgaris Beijerinck)、ユーグレナ・グラシリス(Euglena gracilis)、スピルリナ・サブサルサ(Spirulina subsalsa)、アルスロスピラ・プラテンシス(Arthrospira platensis)からなる群から1以上選択される、項目8~11のいずれか1項に記載の方法。
[13] 前記工程(1)が、加圧下において実施される、項目8~12のいずれか1項に記載の方法。
[14] 前記工程(1)が、60℃~200℃で実施される、項目8~13のいずれか1項に記載の方法。
以下:
(1)藻類を、酸加水分解処理及び/又はアルカリ加水分解処理に供する工程;及び
(2)前記工程(1)により得られる加水分解産物を中和し、藻類抽出物を得る工程;
(3)前記藻類抽出物を細胞培養用培地と混合する工程であって、前記細胞培養用培地はL-グルタミンを実質的に含まないものである、
を含む、前記製造方法。
[16] 前記細胞培養用培地は、さらに、L-アルギニン、L-シスチン、グリシン、L-ヒスチジン、L-イソロイシン、L-ロイシン、L-リジン、L-メチオニン、L-フェニルアラニン、L-セリン、L-スレオニン、L-トリプトファン、L-チロシン、及びL-バリンからなる群から1又は複数選択されるアミノ酸を実質的に含まない、項目15に記載の方法。
[17] 前記細胞培養用培地が、ビタミン類を実質的に含まない、項目15又は16に記載の方法。
[18] 前記細胞培養用培地が、グルコースを実質的に含まない、項目15~17のいずれか1項に記載の方法。
[19] 前記細胞培養用培地が、無機塩培地である、項目15~18のいずれか1項に記載の方法。
[20] 培養される細胞が、動物細胞である、項目15~19のいずれか1項に記載の方法。
[21] 前記藻類が、単細胞藻類である、項目15~20のいずれか1項に記載の方法。
[22] 前記藻類が、単細胞性の緑藻類、単細胞性の藍藻類、単細胞性の紅藻類、単細胞性の車軸藻類及び単細胞性のアオサ藻網からなる群から1以上選択される、項目15~21のいずれか1項に記載の方法。
[23] 前記藻類が、クロロコックム・リトラレ(Chlorococcum littorale)、スティココックス属(Stichococcus sp.)、クロレラ・ブルカリス・ベイエリンク(Chlorella vulgaris Beijerinck)、ユーグレナ・グラシリス(Euglena gracilis)、スピルリナ・サブサルサ(Spirulina subsalsa)、アルスロスピラ・プラテンシス(Arthrospira platensis)からなる群から1以上選択される、項目15~22のいずれか1項に記載の方法。
[24]
前記工程(1)が、加圧下において実施される、項目15~23のいずれか1項に記載の方法。
[25] 前記工程(1)が、60℃~200℃で実施される、項目15~24のいずれか1項に記載の方法。
[26] 項目15~25のいずれか1項に記載の方法により得られる、細胞培養用組成物。
[27] 項目15~25のいずれか1項に記載の方法により得られる細胞培養用組成物を用いる、細胞の培養方法。
(1)藻類を、酸加水分解処理及び/又はアルカリ加水分解処理に供する工程、及び
(2)前記工程(1)により得られる加水分解産物を、中和する工程、
を含む工程により得られる。
(1)藻類を、酸加水分解処理及び/又はアルカリ加水分解処理に供する工程;及び
(2)前記工程(1)により得られる加水分解産物を中和し、藻類抽出物を得る工程;
(3)前記藻類抽出物を細胞培養用培地と混合する工程であって、前記細胞培養用培地はL-グルタミンを実質的に含まないものである、
を含む。
前記成分が、以下:
(1)藻類を、酸加水分解処理及び/又はアルカリ加水分解処理に供する工程、及び
(2)前記工程(1)により得られる加水分解産物を、中和する工程、
を含む工程により得られることを特徴とする、方法を提供する。
1.材料と方法
1-1.微細藻類培養
本研究では、緑藻クロロコックム・リトラレ(Chlorococcum littorale)(C.littorale)(NBRC 102761)、スティココックス属(Stichococcus sp.)(NBRC 102709)(独立化学法人、製品評価技術基盤機構(NITE)、千葉県、日本)、クロレラ・ブルカリス・ベイエリンク(Chlorella vulgaris Beijerinck)(C.vulgaris)(NIES-2170)及びユーグレナ・グラシリス(Euglena gracilis)(E.gracilis)(NIES-49)の4種の真核微細藻類と、スピルリナ・サブサルサ(Spirulina subsalsa)(S.subsalsa)(NIES-3373)及びアルスロスピラ・プラテンシス(Arthrospira platensis)(A.platensis)(NIES-39)(国立環境研究所、茨城県、日本)の2種の原核微細藻類を使用した(図5)。C.littoraleとStichococcus属は、Daigo IMK培地(日本製薬株式会社、東京都、日本)とDaigo人工海水SP(富士フィルム和光純薬株式会社)の混合物により培養した。C.vulgaris、S.subsalsa、E.gracilis及びA.platensisはそれぞれC培地、MA培地、AF-6培地及びSOT培地(国立環境研究所、茨城県、日本)により培養した。微細藻類は浮遊培養フラスコ(AGCテクノグラス株式会社、静岡県、日本)を使って連続採光(約500~700ルクス)下で室温にて(25℃)培養した[参考文献1]。それらの微細藻類の位相差画像は、顕微鏡(ELIPSE TS2、株式会社ニコン、東京都、日本)によりソフトウェア(NIS-Elements BR、ニコン)を使って取得した。
微細藻類から栄養素を抽出するために加水分解法を用いた。上述したフラスコ中で培養した微細藻類は、培養期間を考慮せずにスクリュー瓶(アズワン株式会社、大阪府、日本)中に収集し、オーブン(タイテック株式会社、埼玉県、日本)中で乾燥した。乾燥後、乾燥重量を秤量し、純水を加えて至適濃度(10g/L又は50g/L)になるよう調整した。次いで酸/アルカリ加水分解反応を実施した。オートクレーブ(株式会社トミー精工、東京都、日本)、ヒートブロック(Labnet International Inc.,ニュージャージー州、米国)又は乾熱滅菌器(アドバンテック株式会社、東京都、日本)を使って加熱した。加熱条件は次の通りであった:温度、20~180℃;加熱時間、10~1440分;硫酸濃度、0.0036~1.8規定(N);塩酸及び水酸化ナトリウム濃度、0.36~1N。実験は、温度、時間及び試薬濃度の条件を組み合わせて行った。加熱処理後、塩酸又は水酸化ナトリウムにより中和した。グルコースとアミノ酸の濃度は、それぞれ、ヘキソキナーゼ法[参考文献2]及び液体クロマトグラフィー-質量分析法を使った定量分析により測定した。
C2C12マウス筋芽細胞(住友大日本製薬、東京都、日本)を、10%ウシ胎仔血清(FBS、Thermo-Fischer Scientific,マサチューセッツ州、米国)と1%ペニシリン-ストレプトマイシン(P/S、Invitrogen、Carlsbad、カリフォルニア州、米国)が補充されたダルベッコ改良イーグル培地(DMEM)(Sigma-Aldrich,ミズーリ州、米国)により37℃で5%CO2を含む湿潤雰囲気下で培養した[参考文献3]。細胞増殖と生存率は、XTTアッセイ(Biological Industies,コネチカット州、米国)により評価した。C2C12細胞を96ウェルプレート(AGCテクノグラス株式会社、静岡県、日本)中に10,000細胞/ウェルの密度で播種し、10%FBSと1%P/Sが補充されたDMEM中で一晩培養した。一晩培養後、培地を捨て、リン酸塩緩衝生理食塩水(PBS、Sigma-Aldrich社)で2回洗浄した。その後、藻類抽出物又はグルコース/グルタミン酸含有/不含有の栄養素欠損培地を用いて細胞を培養した。前記溶液を添加した細胞を2日間インキュベートした。各溶液中の色素による吸光度の差をなくすために、XTTアッセイを実施する直前に、各溶液を取り、100μLの10%FBSと1%P/Sを加え、次いで50μLのXTT試薬を添加した。それに続く細胞生死判別試験はプロトコル通り実施した。グルコース不含DMEM(Invitrogen)、グルコース/グルタミン不含DMEM(Invitrogen)及びグルコース/アミノ酸不含DMEM(United State Biological,マサチューセッツ州、米国)を栄養素欠損培地として使用した。必要であれば、グルコース(関東化学株式会社、東京都、日本)又はグルタミン酸(富士フィルム和光純薬株式会社)をそれらの培地に添加した。
(A)通常の動物細胞培養に用いられる培地DMEMの栄養素・ミネラル組成
(i)糖質
・グルコース:1000mg/Lまたは4500mg/L
・ピルビン酸:110mg/L
(ii)アミノ酸
・L-アルギニン:84mg/L
・L-シスチン:48mg/L
・L-グルタミン:584mg/L
・グリシン:30mg/L
・L-ヒスチジン:42mg/L
・L-イソロイシン:105mg/L
・L-ロイシン:105mg/L
・L-リジン:146mg/L
・L-メチオニン:30mg/L
・L-フェニルアラニン:66mg/L
・L-セリン:42mg/L
・L-トレオニン:95mg/L
・L-トリプトファン:16mg/L
・L-チロシン:71mg/L
・L-バリン:94mg/L
(iii)ビタミン
・パントテン酸:4mg/L
・塩化コリン:4mg/L
・葉酸:4mg/L
・i-イノシトール:7.2mg/L
・ナイアシンアミド:4mg/L
・ピリドキシン:4mg/L
・リボフラビン:0.4mg/L
・チアミン:4mg/L
(iv)ミネラル
・CaCl2:200mg/L
・KCl:400mg/L
・Fe(NO3)3・9H2O:0.10mg/L
・MgSO4:98mg/L
・NaCl:6400mg/L
・NaHCO3:3700mg/L
・NaH2PO4:109mg/L
・フェノールレッド:15mg/L
(1)DMEM(グルコース不含)
藻類抽出液を用いることで糖質(グルコース・ピルビン酸)を代替可能であることを示すために用いた。
(i)糖質
・グルコース:0mg/L
・ピルビン酸:0mg/L
(ii)アミノ酸
・L-アルギニン:84mg/L
・L-シスチン:48mg/L
・L-グルタミン:584mg/L
・グリシン:30mg/L
・L-ヒスチジン:42mg/L
・L-イソロイシン:105mg/L
・L-ロイシン:105mg/L
・L-リジン:146mg/L
・L-メチオニン:30mg/L
・L-フェニルアラニン:66mg/L
・L-セリン:42mg/L
・L-トレオニン:95mg/L
・L-トリプトファン:16mg/L
・L-チロシン:71mg/L
・L-バリン:94mg/L
(iii)ビタミン
・パントテン酸:4mg/L
・塩化コリン:4mg/L
・葉酸:4mg/L
・i-イノシトール:7.2mg/L
・ナイアシンアミド:4mg/L
・ピリドキシン:4mg/L
・リボフラビン:0.4mg/L
・チアミン:4mg/L
(iv)ミネラル
・CaCl2:200mg/L
・KCl:400mg/L
・Fe(NO3)3・9H2O:0.10mg/L
・MgSO4:98mg/L
・NaCl:6400mg/L
・NaHCO3:3700mg/L
・NaH2PO4:109mg/L
・フェノールレッド:15mg/L
藻類抽出液を用いることで糖質(グルコース・ピルビン酸)およびアミノ酸(L-アルギニン、L-シスチン、L-グルタミン、グリシン、L-ヒスチジン、L-イソロイシン、L-ロイシン、L-リジン、L-メチオニン、L-フェニルアラニン、L-セリン、L-トレオニン、L-トリプトファン、L-チロシン、L-バリン)を代替可能であることを示すために用いた。
(i)糖質
・グルコース:0mg/L
・ピルビン酸:0mg/L
(ii)アミノ酸
・L-アルギニン:0mg/L
・L-シスチン:0mg/L
・L-グルタミン:0mg/L
・グリシン:0mg/L
・L-ヒスチジン:0mg/L
・L-イソロイシン:0mg/L
・L-ロイシン:0mg/L
・L-リジン:0mg/L
・L-メチオニン:0mg/L
・L-フェニルアラニン:0mg/L
・L-セリン:0mg/L
・L-トレオニン:0mg/L
・L-トリプトファン:0mg/L
・L-チロシン:0mg/L
・L-バリン:0mg/L
(iii)ビタミン
・パントテン酸:4mg/L
・塩化コリン:4mg/L
・葉酸:4mg/L
・i-イノシトール:7.2mg/L
・ナイアシンアミド:4mg/L
・ピリドキシン:4mg/L
・リボフラビン:0.4mg/L
・チアミン:4mg/L
(iv)ミネラル
・CaCl2:200mg/L
・KCl:400mg/L
・Fe(NO3)3・9H2O:0.10mg/L
・MgSO4:98mg/L
・NaCl:6400mg/L
・NaHCO3:3700mg/L
・NaH2PO4:109mg/L
・フェノールレッド:15mg/L
藻類抽出液を用いることで糖質(グルコース・ピルビン酸)、アミノ酸(L-アルギニン、L-シスチン、L-グルタミン、グリシン、L-ヒスチジン、L-イソロイシン、L-ロイシン、L-リジン、L-メチオニン、L-フェニルアラニン、L-セリン、L-トレオニン、L-トリプトファン、L-チロシン、L-バリン)およびビタミン(パントテン酸、塩化コリン、葉酸、i-イノシトール、ナイアシンアミド、ピリドキシン、リボフラビン、チアミン)を代替可能であることを示すために用いた。
(i)糖質
・グルコース:0mg/L
(ii)アミノ酸
・L-アルギニン:0mg/L
・L-シスチン:0mg/L
・L-グルタミン:0mg/L
・グリシン:0mg/L
・L-ヒスチジン:0mg/L
・L-イソロイシン:0mg/L
・L-ロイシン:0mg/L
・L-リジン:0mg/L
・L-メチオニン:0mg/L
・L-フェニルアラニン:0mg/L
・L-セリン:0mg/L
・L-トレオニン:0mg/L
・L-トリプトファン:0mg/L
・L-チロシン:0mg/L
・L-バリン:0mg/L
(iii)ビタミン
・パントテン酸:0mg/L
・塩化コリン:0mg/L
・葉酸:0mg/L
・i-イノシトール:0mg/L
・ナイアシンアミド:0mg/L
・ピリドキシン:0mg/L
・リボフラビン:0mg/L
・チアミン:0mg/L
(iv)ミネラル
・CaCl2:200mg/L
・KCl:400mg/L
・Fe(NO3)3・9H2O:0.10mg/L
・MgSO4:98mg/L
・NaCl:6400mg/L
・NaHCO3:3700mg/L
・NaH2PO4:109mg/L
・フェノールレッド:15mg/L
図面の全てのデータは、平均±SDとして示されている。2つの群を比較する際には、対応のないスチューデントt検定(unpaired Student t-test)を行い、複数の群の比較には事後(post-hoc)テューキーHSD検定を伴う一方向ANOVAを用いた。
2-1.微細藻類からのグルコース抽出
最初に、哺乳類細胞の培地における重要な栄養素であるグルコースを抽出することを試みた。予備実験では、硫酸を使った酸加水分解によるグルコースの抽出効率は、図5に示される6種の微細藻類の中でクロロコックム(C.littorale)が最も高かった。従って、C.littoraleを使うことによって最適条件を検討した。グルコースは、オートクレーブを使った加圧下での高温処理により、微細藻類から効率的に抽出された(硫酸濃度:0.18規定~0.36規定;温度:130~135℃;反応時間:10~20分)(図1A)。他方で、乾熱滅菌器を用いた加圧を伴わない加熱処理(130℃)によるグルコース収率は、同温でのオートクレーブ処理よりも低かった(図1A)。この結果は、温度に加えて圧力が効率的なグルコース抽出に重要であることを示唆している。
DMEMは20種のタンパク質構成アミノ酸のうち、15種を含有する。それらの15種のアミノ酸は、図2の左側に示される、アルギニンからバリンまでのアミノ酸である。次に、0.36規定(N)の硫酸を使って130℃で20分間、C.littoraleからの抽出物中のアミノ酸を定量分析した。藻類抽出物中の15種のアミノ酸全ての濃度が、培地のものよりも低かった(図2A)。タンパク質の効率的な酸加水分解のために、従来24時間の加熱処理が使用されている[参考文献4]。よって、抽出効率を高めるために、1N硫酸を使って100℃で24時間、アミノ酸を抽出した。この方法により抽出アミノ酸の濃度が増加された(図2A)。次に、1N塩酸又は1N水酸化ナトリウムを使用して更に抽出効率を増加させようと試みた。分析結果は、塩酸で抽出された全てのアミノ酸が、硫酸で抽出されたアミノ酸よりも高かった(図2A)。しかしながら、DMEM中に含まれているグルタミンとトリプトファンは、いずれの条件下でも検出されなかった(図2A)。酸加水分解の間に、グルタミンがグルタミン酸に加水分解されたため、抽出物中にグルタミンが検出不可能であり、代わりに高濃度のグルタミン酸が検出された。水酸化ナトリウムを用いた場合でもアミノ酸が効率的に検出されたが、DMEM中に含まれた3種のアミノ酸(アルギニン、シスチン及びヒスチジン)は、酸加水分解によってのみ検出された。従って、アミノ酸を抽出するために、100℃で24時間1N塩酸を用いる酸加水分解を使用することにした。
次に、哺乳類細胞培養の栄養素として藻類抽出物が利用可能かどうかを調べた。C2C12マウス筋芽細胞を、グルコース不含培地を使って培養した場合、2日後に大部分の細胞が死滅した(図4A)。しかしながら、C.littoraleから抽出された抽出物を5%、10%及び20%添加することにより細胞生存率が回復し(図4A)、10%添加でプラトーに達した。この結果は、藻類抽出物が、哺乳類細胞の培養に、重要な栄養素であるグルコースの代用物として利用されることを証明した。
実施例1の1-2に記載の方法でクロレラ・ブルカリス・ベイエリンク(Chlorella vulgaris Beijerinck)から抽出液を調製した。培地として、DMEM又は無機塩培地を用い、クロレラ由来の藻類抽出物がウシ筋肉組織由来細胞の培養結果にどのような効果をもたらすか調べた。実験方法は、実施例1の1-3に記載の方法により行った。なお、ウシ筋肉組織由来細胞は、東京食肉市場株式会社から購入したウシ頬の筋肉細胞をプロテアーゼで処理し、単離した細胞を用いた。
実施例1の1-2に記載の方法でクロレラ・ブルカリス・ベイエリンク(Chlorella vulgaris Beijerinck)から抽出液を調製した。培地として、DMEM又は無機塩培地を用い、クロレラ由来の藻類抽出物の有無及びウシ胎児血清(FBS)の有無が、ウシ筋肉組織由来細胞の培養結果にどのような効果をもたらすか調べた。実験方法は、実施例1の1-3に記載の方法により行った。
実施例1の1-2に記載の方法でクロレラ・ブルカリス・ベイエリンク(Chlorella vulgaris Beijerinck)から抽出液を調製した。培地として、DMEM又は無機塩培地を用い、クロレラ由来の藻類抽出物の有無及びウシ胎児血清(FBS)の有無が、ウシ筋肉組織由来細胞の培養結果、特に細胞増殖期にどのような効果をもたらすか調べた。実験方法は、実施例1の1-3に記載の方法により行った。
[1] Y. Haraguchi, Y. Kagawa, K. Sakaguchi, K. Matsuura, T. Shimizu, et al., Thicker three-dimensional tissue from a "symbiotic recycling system" combining mammalian cells and algae. Sci. Rep. 7 (2017) 41594.
[2] Y. Haraguchi, W. Sekine, T. Shimizu, M. Yamato, S. Miyoshi, A. et al., Development of a new assay system for evaluating the permeability of various substances through three-dimensional tissue. Tissue Eng. Part C Methods. 16 (2010) 685-692.
[3] Y. Haraguchi, T. Shimizu, T. Sasagawa, H. Sekine, K. Sakaguchi, et al., Fabrication of functional three-dimensional tissues by stacking cell sheets in vitro. Nat. Protoc. 7 (2012) 850-858.
[4] S. McCusker, P.R. Buff, Z. Yu, A.J Fascetti, Amino acid content of selected plant, algae and insect species: a search for alternative protein sources for use in pet foods. J. Nutr. Sci. 3 (2014) e39.
[5] E.W. Becker, Micro-algae as a source of protein. Biotechnol. Adv. 25 (2007) 207-210.
[6] P. Spolaore, C. Joannis-Cassan, E. Duran, A. Isambert, Commercial applications of microalgae. J. Biosci. Bioeng. 101 (2006) 87-96.
[7] S.H. Ho, S.W. Huang, C.Y. Chen, T. Hasunuma, A. Kondo, et al., Bioethanol production using carbohydrate-rich microalgae biomass as feedstock. Bioresour. Technol. 135 (2013) 191-198.
Claims (13)
- 細胞培養用組成物の製造方法であって、
以下:
(1)藻類を、酸加水分解処理及び/又はアルカリ加水分解処理に供する工程;及び
(2)前記工程(1)により得られる加水分解産物を中和し、藻類抽出物を得る工程;
(3)前記藻類抽出物を細胞培養用培地と混合する工程であって、前記細胞培養用培地はL-グルタミンを実質的に含まないものである、
を含む、前記製造方法。 - 前記細胞培養用培地は、さらに、L-アルギニン、L-シスチン、グリシン、L-ヒスチジン、L-イソロイシン、L-ロイシン、L-リジン、L-メチオニン、L-フェニルアラニン、L-セリン、L-スレオニン、L-トリプトファン、L-チロシン、及びL-バリンからなる群から1又は複数選択されるアミノ酸を実質的に含まない、請求項1に記載の方法。
- 前記細胞培養用培地が、ビタミン類を実質的に含まない、請求項1又は2に記載の方法。
- 前記細胞培養用培地が、グルコースを実質的に含まない、請求項1~3のいずれか1項に記載の方法。
- 前記細胞培養用培地が、無機塩培地である、請求項1~4のいずれか1項に記載の方法。
- 培養される細胞が、動物細胞である、請求項1~5のいずれか1項に記載の方法。
- 前記藻類が、単細胞藻類である、請求項1~6のいずれか1項に記載の方法。
- 前記藻類が、単細胞性の緑藻類、単細胞性の藍藻類、単細胞性の紅藻類、単細胞性の車軸藻類及び単細胞性のアオサ藻網からなる群から1以上選択される、請求項1~7のいずれか1項に記載の方法。
- 前記藻類が、クロロコックム・リトラレ(Chlorococcum littorale)、スティココックス属(Stichococcus sp.)、クロレラ・ブルカリス・ベイエリンク(Chlorella vulgaris Beijerinck)、ユーグレナ・グラシリス(Euglena gracilis)、スピルリナ・サブサルサ(Spirulina subsalsa)、アルスロスピラ・プラテンシス(Arthrospira platensis)からなる群から1以上選択される、請求項1~8のいずれか1項に記載の方法。
- 前記工程(1)が、加圧下において実施される、請求項1~9のいずれか1項に記載の方法。
- 前記工程(1)が、60℃~200℃で実施される、請求項1~10のいずれか1項に記載の方法。
- 請求項1~11のいずれか1項に記載の方法により得られる、細胞培養用組成物。
- 請求項1~11のいずれか1項に記載の方法により得られる細胞培養用組成物を用いる、細胞の培養方法。
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| CN115125195A (zh) * | 2022-07-11 | 2022-09-30 | 中国海洋大学 | 一种单细胞绿藻组合功能因子及其在细胞培养肉中的应用 |
| JP2025533862A (ja) * | 2022-12-15 | 2025-10-09 | シージェイ チェイルジェダン コーポレーション | 微細藻類抽出物を含む細胞培養用組成物およびその用途 |
| CN118207066A (zh) * | 2024-04-10 | 2024-06-18 | 山东大学 | 一种盐泽螺旋藻培养单元、培养装置及培养方法 |
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| Publication number | Publication date |
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| JPWO2021066113A1 (ja) | 2021-04-08 |
| US20220340864A1 (en) | 2022-10-27 |
| EP4039796A4 (en) | 2023-11-01 |
| JP7248349B2 (ja) | 2023-03-29 |
| EP4039796A1 (en) | 2022-08-10 |
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