WO2020080270A1 - 栄養組成物 - Google Patents
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- WO2020080270A1 WO2020080270A1 PCT/JP2019/040145 JP2019040145W WO2020080270A1 WO 2020080270 A1 WO2020080270 A1 WO 2020080270A1 JP 2019040145 W JP2019040145 W JP 2019040145W WO 2020080270 A1 WO2020080270 A1 WO 2020080270A1
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- A61K31/4164—1,3-Diazoles
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Definitions
- undifferentiated stem cells remain at the stage of culturing the cell population before transplantation, or the stem cells differentiate into target cells.
- the stem cells differentiate into target cells.
- suppress teratoma formation of undifferentiated stem cells and proliferation of cells that could not be differentiated into target cells There is a need to.
- suppressing the formation and / or proliferation of unintended cells derived from stem cells is important for improving the safety and efficacy of cell therapy and regenerative medicine.
- Non-Patent Document 1 discloses a methionine-deficient diet (human vegan diet) for suppressing cancer growth.
- Non-Patent Document 2 shows that a serine- and glycine-deficient diet delays tumor growth in HCT116 (invasive human colorectal cancer cell line) tumor-bearing rats and reduces in vivo proliferation of HCT116 cells. Is disclosed.
- Non-Patent Document 3 discloses autophagy cell death due to arginine deficiency in argininosuccinate synthetase 1 (ASS1) -deficient breast cancer cells.
- Non-Patent Document 4 suggests a therapeutic effect on various diseases including cancer by deficient arginine and glutamine.
- Non-Patent Document 5 discloses an antitumor effect by an enzyme that causes a deficiency of asparagine, glutamine, methionine, and the like.
- Non-Patent Document 6 discloses that a growth deficiency of methionine and valine suppressed tumor growth in tumor-bearing rats.
- Non-Patent Document 7 discloses that tumors have regressed in tumor-bearing rats due to a valine-deficient diet.
- Non-Patent Documents 1 to 7 all relate to the therapeutic effect on cancer (malignant tumor), and the nutritional compositions lacking a specific amino acid disclosed in each of them are cell populations containing cells differentiated from stem cells. , It is not described that the formation and / or proliferation of unintended cells derived from stem cells can be suppressed.
- Patent Document 1 is composed of all essential amino acids of human (histidine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan, valine, cysteine and tyrosine) and does not contain human non-essential amino acids other than arginine.
- a nutritional composition containing an amino acid composition for the treatment of inflammatory diseases (for example, inflammatory bowel diseases such as Crohn's disease and ulcerative colitis).
- JP2012-201625A Patent No. 5837315
- the present invention relates to the formation and / or proliferation of non-target cells derived from stem cells in a cell population containing cells differentiated from stem cells, which are used for cell therapy, regenerative medicine, etc. It is an object of the present invention to provide a means for suppressing the transplantation or administration of.
- the present inventors have found that the relationship between cancer cells and amino acid uptake does not necessarily match the relationship between unintended cells derived from stem cells and amino acid uptake, and completed the present invention. . That is, the present invention provides the following [1] to [11] to solve the above problems.
- a method for suppressing the formation and / or proliferation of unintended cells derived from stem cells which comprises ingesting the nutritional composition according to item [1] into a cell population containing cells differentiated from stem cells.
- a non-target cell derived from a stem cell in vivo which comprises ingesting the nutritional composition according to item [1] into a mammal to which a cell population containing cells differentiated from the stem cell has been transplanted or administered. Method for inhibiting the formation and / or proliferation of the bacterium.
- undesired cells eg, formation of teratoma
- iPS cells undifferentiated stem cells
- objective cells eg, endoderm, mesoderm, ectoderm
- FIG. 1 shows the weight of a kidney transplanted into a mouse (A), the weight change of a mouse after transplantation surgery (B), and the weight of a teratoma (C) in Test Example 1 (transplantation test 1) using a valine-deficient diet. It is a graph showing each.
- FIG. 2 shows (A) the weight of a kidney transplanted in a mouse, (B) the weight change of a mouse after transplantation surgery, and (C) a teratoma in Test Example 2 (transplantation test 2) using a serine / glycine deficient diet. It is a graph showing each of the weight of.
- FIG. 1 shows the weight of a kidney transplanted into a mouse (A), the weight change of a mouse after transplantation surgery (B), and the weight of a teratoma (C) in Test Example 1 (transplantation test 1) using a valine-deficient diet. It is a graph showing each.
- FIG. 2 shows (A) the weight of a kidney transplante
- FIG. 3 shows (A) the weight of a kidney transplanted in a mouse, (B) the weight change of a mouse after transplant surgery, and (C) a teratoma in Test Example 2 (transplantation test 2) using a non-essential amino acid-deficient diet. It is a graph showing each of the weight of.
- FIG. 4 is a graph showing the survival rate of human iPS cells in a valine-containing medium (+ valine) and a valine-free medium (-valine) in Test Example 4.
- FIG. 5 is a graph showing the survival rate of human iPS cells cultured with an organoid in a valine-containing medium (+ valine) and a valine-free medium (-valine) in Test Example 5.
- stem cells refer to, for example, pluripotent stem cells and “pluripotent stem cells”.
- “Pluripotent stem cells” are capable of differentiating into tissues and cells with various different morphologies and functions of living organisms, and can be transformed into cells of any of the three germ layers (endoderm, mesoderm, ectoderm) Also refers to stem cells that have the potential to differentiate.
- the “pluripotent stem cell” that can be used in the present invention is not particularly limited, but for example, embryonic stem cells (ES cells, which may be referred to as “ESC” in the present specification), nuclear transfer Examples of the obtained cloned embryo-derived embryonic stem cells, sperm stem cells, embryonic germ cells, induced pluripotent stem cells (iPS cells, sometimes referred to as “iPSC” in the present specification) and the like.
- induced pluripotent stem cells established by introducing the four factors of OCT3 / 4, SOX2, NANOG, and LIN28 produced by Thomson et al. (Yu J., Thomson JA. Et al., Science (2007) 318: 1917-1920.), Artificial pluripotent stem cells produced by Daley et al. (ParkIH, Daley GQ. Et al., Nature (2007) 451: 141-146), and artificial pluripotent stem cells produced by Sakurada et al. (Japanese Patent Laid-Open No. 2008-307007) and the like can also be used.
- all published papers e.g.
- iPSC Induced pluripotent stem cells
- NIH RIKEN
- Kyoto University etc.
- human iPSC strain Riken HiPS-RIKEN-1A strain, HiPS-RIKEN-2A strain, HiPS-RIKEN-12A strain, Nips-B2 strain, Kyoto University 201B7 strain, 253G1 strain, 253G4 strain, 409B2 Strains, 454E2 strains, 606A1 strains, 610B1 strains, 648A1 strains, 1201C1 strains, 1205D1 strains, 1210B2 strains, 1231A3 strains, 1383D2 strains, 1383D6 strains and the like.
- clinical-grade cell lines provided by Kyoto University, Cellular Dynamics International, and the like, and research and clinical cell lines produced using these cell lines may be used.
- Mesenchymal stem cells are multipotent stem cells that can differentiate into mesenchymal cells including osteoblasts, muscle cells, chondrocytes, and adipocytes.
- the mesenchymal stem cells may be cells isolated from living tissues or cells derived from ES cells or iPS cells. Markers specific to mesenchymal stem cells include, for example,ieriios Karantalis and Joshua M. Hare, Circ Res. 2015 April10; 116 (8): 1413-1430, and Imran Ullah, et al., Biosci. Rep. ( 2015), 35 / art: e00191 etc., but is not limited to these.
- Neurosar stem cells are multipotent stem cells that can differentiate into the central nervous system such as neurons and glial cells (astrocytes, oligodendrocytes).
- the neural stem cell may be a cell isolated from a living tissue such as the periphery of the lateral ventricle, or a cell derived from an ES cell or iPS cell.
- Cell populations can also be purified for target cell types by cell selection and sorting methods known in the art. Cell populations can also be purified by the particular sorting or selection processes described herein. In certain embodiments of the invention, the method of purifying a target cell population results in a target cell population purity of at least 70%, 80%, 85%, 90%, 95%, 97%, 98%, 99% or 99.9% or impurities (including contaminating cells) can be undetectable.
- cell culture may be performed by suspension culture.
- suspension culture the components of the culture solution and the oxygen concentration in the culture solution are made uniform by stirring or shaking, and the cells are grown through the formation of aggregates.
- a suitable stirring speed is appropriately set according to the cell density and the size of the culture vessel, but excessive stirring or shaking gives physical stress to the cells and inhibits the formation of cell aggregates. Therefore, the components of the culture solution and the oxygen concentration in the culture solution can be made uniform, and the stirring or shaking speed is controlled so as not to inhibit the formation of aggregates.
- the culture temperature is not particularly limited, but is typically 30 to 40 ° C (for example, 37 ° C).
- the carbon dioxide concentration in the culture vessel is not particularly limited, for example, about 5%, and the oxygen concentration is not particularly limited, but is typically about 1% to 21%.
- “Growth factor” is an endogenous protein that promotes the differentiation and / or proliferation of specific cells.
- growth factor examples include epidermal growth factor (EGF), acidic fibroblast growth factor (aFGF), basic fibroblast growth factor (bFGF), hepatocyte growth factor (HGF), insulin-like growth factor 1 (IGF-1), insulin-like growth factor 2 (IGF-2), keratinocyte growth factor (KGF), nerve growth factor (NGF), platelet-derived growth factor (PDGF), transforming growth factor beta (TGF- ⁇ ), Vascular endothelial growth factor (VEGF), transferrin, various interleukins (eg IL-1 to IL-18), various colony-stimulating factors (eg granulocyte / macrophage colony-stimulating factor (GM-CSF)) , Various interferons (such as IFN- ⁇ ) and other cytokines that have effects on stem cells, such as stem cell factor (SCF) and erythropoietin (Ep
- essential amino acid means an essential amino acid for human (adult) (human essential amino acid), that is, valine (V), isoleucine (I), leucine (L), methionine. (M), lysine (K), phenylalanine (F), tryptophan (W), threonine (T), and histidine (H) 9 kinds of amino acids.
- valine V
- isoleucine I
- leucine L
- M methionine
- K lysine
- F phenylalanine
- W tryptophan
- T threonine
- histidine histidine
- non-essential amino acid means a non-essential amino acid for human (adult) (human non-essential amino acid), that is, arginine (R), glycine (G), serine (S), unless otherwise specified. , Asparagine (N), glutamine (Q), alanine (A), cysteine (C), aspartic acid (D), glutamic acid (E), tyrosine (Y), proline (P).
- the "group consisting of arginine, glycine, serine, asparagine and glutamine” is referred to as "specific non-essential amino acid group" in the present specification.
- essential amino acids and non-essential amino acids are L-forms, which are forms that can be used by humans and other mammals, and they are further in the form of salts and / or derivatives (for example, L- Histidine hydrochloride, L-lysine hydrochloride, N-acetyl-L-cysteine, L-cystine, N-acetyl-L-tryptophan, etc.) may be used.
- the nutritional composition of the present invention contains one or more essential amino acids selected from the group (specific essential amino acids) consisting of isoleucine, leucine, methionine, lysine, phenylalanine, tryptophan, threonine and histidine, excluding valine, and is non-essential. It is for suppressing the formation and / or proliferation of unintended cells derived from stem cells in a cell population containing cells differentiated from stem cells, which optionally contain amino acids.
- group specific essential amino acids
- amino acid component "Containing at least one essential amino acid selected from the group consisting of isoleucine, leucine, methionine, lysine, phenylalanine, tryptophan, threonine, and histidine, excluding valine” means that valine is not contained among the essential amino acids.
- one or more selected (a group consisting of a specific essential amino acid group) of “a group consisting of isoleucine, leucine, methionine, lysine, phenylalanine, tryptophan, threonine and histidine” one kind or plural kinds, all ) Is included, and those not selected are not included.
- the nutritional composition of the present invention may contain at least methionine as an essential amino acid. That is, of the specific essential amino acid group, at least methionine is selected as one to be contained in the nutritional composition, and other than that selected as one to be contained in the nutritional composition (that is, the nutritional composition of the present invention contains Also, the nutritional composition may not be selected to be included (that is, the nutritional composition of the present invention may not be included).
- the nutritional composition of the present invention does not contain valine (deficient), contains at least methionine in the specific essential amino acid group, and contains the other (essential amino acid to be contained). It is a nutritional composition that does not need to be contained (not necessarily selected as an essential amino acid to be contained).
- the nutritional composition of the present invention may optionally contain non-essential amino acids, that is, one or more individual amino acids corresponding to non-essential amino acids, or none at all.
- the essential amino acids contained in the nutritional composition of the present invention may be as described in the present specification.
- the nutritional composition of the present invention does not contain all non-essential amino acids.
- the essential amino acids may be, for example, all essential amino acids other than valine (including all essential amino acids belonging to the specific essential amino acid group), or described in relation to the essential amino acids. It may be as in the two specific embodiments.
- the nutritional composition of the present invention is a nutritional composition containing one or more non-essential amino acids selected from the group consisting of arginine, glycine, serine, asparagine and glutamine (specific non-essential amino acid group). That is, the nutritional composition contains one or more (only one kind, plural kinds, or all) selected from the group of specific non-essential amino acids, and does not contain those not selected. .
- the nutritional composition of the present invention includes (i) arginine-containing, (ii) glycine and serine-containing, (iii) arginine and glutamine-containing, (iv) asparagine and Contains glutamine, or (v) contains arginine, glycine, serine, asparagine, and glutamine, does not contain a specific non-essential amino acid group other than the above (i) to (v), and, if necessary, a specific non-essential amino acid Non-essential amino acids that do not belong to the group (one or more selected from the group consisting of alanine, cysteine, aspartic acid, glutamic acid, tyrosine and proline (P)) may also be contained.
- first nutritional composition an embodiment suitable for being ingested by mammals such as humans so as to exhibit the action and effect of the present invention in vivo
- second nutritional composition an embodiment suitable for being used for culturing cells so as to exert the effects of the present invention in vitro. Items)) are described in order.
- cell population comprising cells differentiated from stem cells means a cell population for transplantation or administration to a mammal for the purpose of cell therapy or regenerative medicine.
- a method of using the “cell population containing cells differentiated from stem cells”, for example, a method for transplanting or administering to a target mammal, and other technical matters related to such a cell population are also commonly used. According to the law, various known embodiments can be used.
- the “cell population containing cells differentiated from stem cells” is limited to the cell population prepared for therapeutic use such as the above-mentioned cell therapy or regenerative medicine. However, it may be a cell population prepared for other purposes (for example, construction of drug screening system or toxicity evaluation system).
- the "cell population containing cells differentiated from stem cells” in the cell population includes target cells and non-target cells, which can be arbitrarily selected from various cells depending on the use of the cell population and the culture method. You can
- target cell examples include, for example, tile cells, nerve cells, glial cells, pancreatic ⁇ cells, bone marrow cells, mesangial cells, Langerhans cells, epidermal cells, epithelial cells, endothelial cells, fibroblasts, fiber cells, muscle cells ( Examples: Skeletal muscle cells, cardiomyocytes, myoblasts, muscle satellite cells), adipocytes, immune cells (eg macrophages, T cells, B cells, natural killer cells, mast cells, neutrophils, basophils, neutrophils) Matured after differentiation, such as eosinophils, monocytes, megakaryocytes, synovial cells, chondrocytes, osteocytes, osteoblasts, osteoclasts, mammary gland cells, hepatocytes, stromal cells, oocytes and spermatids Cells or their functional progenitor cells.
- tile cells nerve cells, glial cells, pancreatic ⁇ cells, bone marrow cells, me
- target cells dopaminergic cells, neural stem cells, corneas, retinal pigment epithelial cells, myocardium, photoreceptors, platelets, erythrocytes, bone, cartilage, skeletal muscle, which are used in regenerative medicine using iPS cells, Examples thereof include kidney cells, pancreatic ⁇ cells, hepatocytes or their functional precursor cells.
- “functional progenitor cell” means a cell that exhibits the same or similar effect as the corresponding mature cell.
- non-target cells undifferentiated or immature cells (eg, undifferentiated stem cells) that do not have the intended effect and / or may have an undesired effect based on the target cell are used.
- iPS cells cells that have stopped differentiating into target cells in the middle of culture
- endoderm mesoderm, ectoderm
- cells that have undergone unintended differentiation eg, teratoma
- the “non-target cells” also include stem cells that have not differentiated (undifferentiated) in the process of inducing differentiation of target cells from stem cells.
- the content of the non-target cells derived from the stem cells in the cell population is determined by ingesting the first nutritional composition described below to form non-target cells (eg, formation of teratoma). And / or proliferation of undesired cells (eg, undifferentiated stem cells (eg, iPS cells)), cells that have ceased to differentiate into cells of interest in the middle of culture (eg, endoderm, mesoderm, exodermis) This is a preferable range for suppressing the growth of germ layers). That is, the content ratio of the non-target cells in the cell population is appropriately determined by those skilled in the art according to the desired therapeutic effect, and is not uniformly defined.
- the second nutritional composition by using the second nutritional composition described below, in a cell population containing cells differentiated from stem cells in vitro, undesired cells derived from stem cells (eg, undifferentiated stem cells) It is possible to suppress the formation and / or proliferation of (eg, iPS cells), cells (eg, endoderm, mesoderm, ectoderm) whose differentiation into target cells has stopped in the middle of culture.
- iPS cells eg, endoderm, mesoderm, ectoderm
- other depletion (purification) means may be used in combination with the second nutritional composition.
- a differentiation-inducing condition a medium component, a culturing method, and other technical matters for preparing a cell population containing a desired target cell from a stem cell are described later in the second nutritional composition.
- a conventional method can be used except that the above method is used, and various known embodiments can be used.
- the shape of the first nutritional composition for ingestion by mammals such as humans is not particularly limited as long as it can be orally or parenterally administered.
- Solid preparations for oral intake powder preparations, semi-solid foods (eg, jelly, liquid foods), semi-solid preparations (eg, jelly preparations for oral intake), beverages, liquid preparations (liquid preparations for oral intake, parenteral intake)
- Liquid medicines eg, infusion preparations
- the content of the amino acid in the first nutritional composition can be appropriately adjusted according to the type of the amino acid, and for example, 1.25 to 12.5 g / 100 kcal nutritional composition per energy of the entire nutritional composition. can do.
- the content of the essential amino acids (other than those intended to be deficient) in the first nutritional composition is, for example, shown in the following table, and the recommended daily intake of the essential amino acids by WHO for adults (FAO / WHO / UNU (2007). PROTEIN AND AND AMINO ACID REQUIREMENTS INHU HUMANNUTRITION ”.WHO Press.p150), referring to the mode of intake of the nutritional composition of the present invention (intake of the nutritional composition per day or once) Amount, energy amount, etc.).
- the intake for children aged 3 and over is about 10 to 20% higher than for adults, and the intake for 0-year-olds is about 150% higher than for adults.
- cysteine and tyrosine are classified as non-essential amino acids rather than essential amino acids, they are included in the table because the recommended intake amount as a total amount in combination with methionine and phenylalanine is defined.
- the content of cysteine and tyrosine is also appropriately determined with reference to the above table, in consideration of the intake form of the nutritional composition of the present invention (intake amount of the nutritional composition per day or once, energy amount, etc.). It can be adjusted.
- non-essential amino acids other than cysteine and tyrosine is appropriately adjusted in consideration of the mode of intake of the nutritional composition of the present invention (intake amount of the nutritional composition per day or once, energy amount, etc.). can do.
- the content of each essential amino acid in the first nutritional composition is, for example, as follows.
- Valine 0 mg / kg body weight; Isoleucine: 0 mg / kg body weight to 30 mg / kg body weight, preferably 0 mg / kg body weight to 20 mg / kg body weight;
- Leucine 0 mg / kg body weight to 50 mg / kg body weight, preferably 0 mg / kg body weight to 40 mg / kg body weight;
- Methionine 0 mg / kg body weight to 30 mg / kg body weight, preferably 0 mg / kg body weight to 15 mg / kg body weight;
- Lysine 0 mg / kg body weight to 50 mg / kg body weight, preferably 0 mg / kg body weight to 30 mg / kg body weight;
- Phenylalanine 0 mg / kg body weight to 50 mg / kg body weight, preferably 0 mg / kg body weight to 25 mg / kg body weight; Tryptophan: 0 mg / /
- the first nutritional composition for example, after setting the composition of the essential amino acids and non-essential amino acids that the nutritional composition should contain as described above, commercially available individual amino acid raw materials are mixed to form an amino acid mixture. From the viewpoint of handleability, it is preferable to prepare a composition having a desired form after preparing.
- the first nutritional composition can be efficiently produced by further mixing such an amino acid mixture with other components used as necessary as described below.
- Butanoic acid butyric acid, 4: 0
- hexanoic acid caproic acid, 6: 0
- heptanoic acid 7: 0
- octanoic acid caprylic acid, 8: 0
- decanoic acid capric acid, 10: 0
- Dodecanoic acid lauric acid, 12: 0
- tridecanoic acid 13: 0
- tetradecanoic acid myristic acid, 14: 0
- pentadecanoic acid (15: 0), hexadecanoic acid (palmitic acid, 16: 0)
- Heptadecanoic acid (17: 0
- Octadecanoic acid stearic acid 18: 0
- Icosanoic acid arachidic acid, 20: 0
- Docosanoic acid behenic acid, 22: 0
- fats and oils that serve as a source of fatty acids include natural fats and oils such as soybean oil, corn oil, palm oil, perilla oil, canola oil, safflower oil, sunflower oil, sesame oil, rice oil, grape seed oil and fish oil; Examples thereof include synthetic fats and oils such as medium chain fatty acid triglyceride (MCT) having about 6 to 12 carbon atoms.
- MCTs include caproic acid triglyceride, dicaprylic acid capric acid triglyceride, lauric acid capric acid caprylic acid triglyceride, caprylic acid triglyceride (tricaprylin), and the like.
- the content of minerals in the first nutritional composition can be appropriately adjusted according to the type of minerals.
- the total content of minerals (the weight in the form of salt etc.) It can be 1 mg to 50 g / 100 kcal nutritional composition per energy.
- vitamin E examples include, for example, ⁇ -tocopherol, ⁇ -tocopherol, ⁇ -tocopherol, ⁇ -tocopherol, ⁇ -tocopherol, ⁇ -tocotrienol, ⁇ -tocotrienol, ⁇ -tocotrienol, ⁇ -tocotrienol, their acetic acid esters, nicotinic acid esters, Examples thereof include derivatives such as phosphoric acid esters and salts thereof such as ⁇ -tocopherol disodium.
- vitamin K examples include phytonadione (vitamin K 1 ), menaquinone (vitamin K 2 ), menadione (vitamin K 3 ), and salts thereof.
- vitamin B examples include thiamine (vitamin B 1 ), riboflavin (vitamin B 2 ), nicotinic acid, nicotinamide (above, niacin; vitamin B 3 ), pantothenic acid (vitamin B 5 ), pyridoxine, pyridoxal, pyridoxamine.
- vitamin B 6 biotin
- vitamin B 7 biotin
- folic acid vitamin B 9
- cyanocobalamin adenosyl cobalamin
- methylcobalamin sulfitocobalamin
- hydroxocobalamin hydroxocobalamin
- vitamin B 12 examples include choline and its salts (for example, choline bitartrate, choline hydrochloride) can be included in vitamin B.
- the content of vitamins in the first nutritional composition can be appropriately adjusted according to the type of vitamins.
- the total nutritional composition can be the total vitamins (the weight of which is in the form of salts, derivatives, etc.).
- a nutritional composition of 0.005 mg to 1000 mg / 100 kcal can be obtained.
- the first nutritional composition is used for general foods and formulations such as excipients, emulsifiers, stabilizers, pH adjusters, gelling agents, flavors, colorings and other additives in addition to the above components. It may further contain the components described above.
- Mammals to which the first nutritional composition is administered include humans and non-human mammals (non-human mammals such as mouse, rat, hamster, guinea pig, rabbit, dog, cat, pig, cow, horse, sheep. , Monkeys) are included.
- the administration route of the first nutritional composition is not particularly limited, and may be oral administration (eg, eating) or parenteral administration (eg, intravenous administration, enteral administration using a PEG tube, etc.).
- the frequency of administration may be once to several times a day, and an appropriate amount of the first nutritional composition may be administered each time.
- the daily dose of the first nutritional composition is not particularly limited as long as it satisfies the daily amino acid intake.
- it can be administered to an adult in an amount of 0.001 g to 1.5 g / kg body weight / day, preferably 0.1 g to 1.0 g / kg body weight / day, in terms of amino acid composition.
- the dose can be appropriately increased or decreased depending on the age, body weight, sex of the administration subject (human or non-human mammal), transplantation of a cell population including cells differentiated from stem cells, and / or administration method and / or method. Is.
- the administration period of the first nutritional composition is from the day when the cell population containing the cells differentiated from the stem cells is transplanted or administered (herein referred to as “surgical day”), and the cell population containing the cells differentiated from the stem cells.
- the period may be any period required to suppress the formation and / or proliferation of the undesired cells derived from the stem cells.
- the administration period of the first nutritional composition is 7 days, 8 days, 9 days, 10 days, 11 days, 12 days, 13 days consecutively from the day after the surgery day (day 0) (day 1). It can be 14 days, 21 days, 28 days, 30 days, 60 days, 90 days, 120 days, etc. In one embodiment, the administration period of the first nutritional composition is 11 days or more.
- the above administration period is appropriately determined based on the age, weight, sex, symptoms, etc. of the administration subject (human or non-human mammal). For example, when the administration period is determined on the basis of body weight, when the administration subject has a body weight of 25 g (eg, male adult mouse), the administration period is typically 7 days to 21 days, 7 days to 28 days, 11 days. -21 days, or 11-28 days. When the administration subject weighs 60 kg (eg, human adult male), the administration period is typically 90 days to 120 days. If the nutritional composition of the present invention is ingested for a certain period of time, the risk of the formation and / or proliferation of undesired cells derived from stem cells is reduced even after the end of ingestion.
- the effect of suppressing the formation and / or proliferation of undesired cells derived from stem cells in a cell population containing cells differentiated from stem cells in vivo is, for example, when a mammal is ingested with the first nutritional composition.
- the weight or size of the non-target cells in the transplanted or administered cell population is reduced as compared with the case where the first nutritional composition is not ingested.
- Target cells and non-target cells can also be detected, for example, by using surface markers, antigens, sugar chains, etc. specific to each cell.
- the second nutritional composition for use in culturing a cell population that includes cells differentiated from stem cells typically takes the form of a medium for the cells. That is, the shape of the second nutritional composition is in accordance with the shape of a medium generally used for culturing cells (in particular, culture for inducing differentiation of target cells from stem cells) or other known medium. can do.
- the medium generally contains components such as inorganic salts, carbohydrates, amino acids, vitamins, fatty acids or lipids, proteins or peptides, serum or its substitutes, and trace elements.
- Components such as vitamins (vitamin B12, vitamin A, vitamin E, riboflavin, thiamine, biotin), fatty acids / lipids (cholesterol and other steroids), proteins / peptides (albumin, transferrin, fibronectin, fetuin, etc.) Addition to the medium is particularly important when in serum-free form (usually supplied by serum).
- the second nutritional composition also contains growth factors and other components necessary for inducing differentiation of stem cells into target cells.
- the medium may further contain antibiotics (eg, Antibiotic-Antimycotic, penicillin, streptomycin, or a mixture thereof), antibacterial agents (eg, amphotericin B), antioxidants, pyruvic acid, and a buffer, if necessary.
- antibiotics eg, Antibiotic-Antimycotic, penicillin, streptomycin, or a mixture thereof
- antibacterial agents eg, amphotericin B
- antioxidants eg, amphotericin B
- pyruvic acid e.g, pyruvic acid
- the composition of the second nutritional composition (type and amount of each component) is based on a general medium (in particular, a medium for inducing differentiation of target cells from stem cells), and amino acids are described herein according to the present invention.
- the other components can be adjusted in the same manner as in a general medium, or can be adjusted as necessary (for example, corresponding to the adjustment of amino acids).
- the components such as fatty acids or lipids, carbohydrates, inorganic salts, trace elements and vitamins contained in the second nutritional composition
- the components such as fats, sugars, minerals and vitamins contained in the first embodiment are described below. It can be selected or adjusted (changed) to be suitable for use in culturing cells by appropriately referring to the matters described in the specification.
- the kit according to the present invention comprises the nutritional composition of the present invention and a cell population containing cells differentiated from stem cells.
- the technical matters described in the context of the nutritional composition of the present invention can be similarly applied in the context of the kit of the present invention using the nutritional composition.
- the kit of the present invention includes a cell population used for transplantation in surgery for cell therapy or regenerative medicine, and a human (patient) or non-human mammal (experimental animal) who has undergone the surgery ingested after transplant surgery. And a first nutritional composition for dosing.
- the use of the nutritional composition according to the present invention is the use of the nutritional composition of the present invention for suppressing the formation and / or proliferation of undesired cells derived from stem cells in a cell population containing cells differentiated from stem cells.
- the technical matters described in relation to the nutritional composition of the present invention can be similarly applied in relation to the use of the nutritional composition described above.
- the use of the nutritional composition according to the invention may be carried out in vivo or in vitro.
- Transplantation test 2 Serine and glycine deficient feed NOG mice used in the experiment arrived at 6 weeks of age, and were used for 1 week after acclimatization. The body weight was measured, and under inhalation anesthesia with isoflurane of 1.5-2.0%, an incision was made from the right center of the back or the left center of the back to expose the kidney. Under the renal capsule, a human iPS cell 1383D2 strain (obtained from Kyoto University iPS Cell Research Institute) (5 million cells) was transplanted under the renal capsule using an injection needle. A total of 18 mice were transplanted with iPS cells, and 4 mice were used as a Sham group in which the surgical procedure was the same but only transplantation was not performed.
- MC human mesenchymal stem cells
- Human iPS cells 1383D2 were added to DMEM / F-12 (Gibco) (10 ml) with 1% B-27 Supplement (GIBCO) and BMP4 (25 ng).
- / ml) and CHIR99021 8 ⁇ M were added to the medium to induce mesodermal cells by culturing at 37 ° C. in 5% CO 2 for 3 days.
- the obtained mesodermal cells were added with PDGFBB (10 ng / ml) and activin A (2 ng / ml) to the same medium, and further cultured at 37 ° C. in 5% CO 2 for 3 days.
- the culture medium was HCM (Lonza) plus FBS (5%), HGF (10 ng / ml), OSM (20 ng / ml) and Dex (100 nM) for liver cell medium (A), A mixture of Stempro-34 SFM (Gibco) and VEGF (50 ng / ml) and FGF2 (10 ng / ml) for vascular endothelial cell medium (A) at a volume ratio of 1: 1 (herein, " The medium for organoid (A) "was used. After 1 day of co-culture, the organoid medium (A) was changed to the following medium, and 1 day after medium exchange, the cell viability was measured by FACS fortessa.
- Valine-containing medium DMEM / F-12 (Gibco) with KSR (5%), HGF (10 ng / ml), OSM (20 ng / ml) and Dex (100 nM) added to the liver cell medium (B)
- Valine-free medium KMEM (5%), HGF (10ng / ml), OSM (20ng / ml) and Dex (100nM) were added to DMEM / F-12 (-Val) (Functional Peptide Research Institute, custom-made).
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Abstract
Description
細胞治療や再生医療では、in vitroでiPS細胞などの幹細胞を、目的とする細胞またはそれを含む細胞集団(組織)に分化誘導させた後、それを移植または投与して疾患の治療や病変組織を再生することが図られる。しかしながら、移植する細胞または細胞集団に未分化の幹細胞(例、iPS細胞)や目的細胞に分化できなかった細胞(例、内胚葉、中胚葉、外胚葉)が残存している場合、移植後に生体内でテラトーマ(奇形腫)が形成されるおそれや、目的細胞に分化できなかった細胞が増殖するおそれがある。移植等に用いる細胞集団からこのような事象が起きないようにするためには、(1)移植前の細胞集団の培養の段階において、未分化の幹細胞が残存したり、幹細胞から目的細胞に分化できなかった細胞が形成および/または残存したりすることを極力防ぐか、(2)移植後の細胞集団において、未分化の幹細胞のテラトーマ化や、目的細胞に分化できなかった細胞の増殖を抑制する必要がある。幹細胞から分化した細胞を含む細胞集団においては、幹細胞由来の目的外細胞の形成および/または増殖を抑制することは、細胞治療や再生医療の安全性や有効性を向上させる上で重要である。
すなわち本発明は、上記課題解決のため、以下の[1]~[11]を提供する。
[1] バリンを除く、イソロイシン、ロイシン、メチオニン、リジン、フェニルアラニン、トリプトファン、スレオニンおよびヒスチジンからなる群より選択される1以上の必須アミノ酸を含有し、非必須アミノ酸を任意で含有する、幹細胞から分化した細胞を含む細胞集団において幹細胞由来の目的外細胞の形成および/または増殖を抑制するための、栄養組成物。
[2] 必須アミノ酸として、少なくともメチオニンを含有する、項[1]に記載の栄養組成物。
[3] 非必須アミノ酸を含有しない、項[1]に記載の栄養組成物。
[4] アルギニン、グリシン、セリン、アスパラギンおよびグルタミンからなる群より選択される1以上の非必須アミノ酸を含有する、項[1]に記載の栄養組成物。
[5] アミノ酸以外の栄養素をさらに含む、項[1]に記載の栄養組成物。
[6] 11日間以上摂取される、項[1]に記載の栄養組成物。
[7]栄養組成物が、1)固形食、固形剤、半固形食、半固形剤、飲料、液剤から選ばれるものであるか、または2)培地である、項[1]に記載の栄養組成物。
[8] 項[1]記載の栄養組成物、および幹細胞から分化した細胞を含む細胞集団を含むキット。
[9] 幹細胞から分化した細胞を含む細胞集団に、項[1]に記載の栄養組成物を摂取させることを含む、幹細胞由来の目的外細胞の形成および/または増殖の抑制方法。
[10] 幹細胞から分化した細胞を含む細胞集団において幹細胞由来の目的外細胞の形成および/または増殖を抑制するための、項[1]に記載の栄養組成物の使用。
[11] 幹細胞から分化した細胞を含む細胞集団が移植または投与された哺乳動物に、項[1]に記載の栄養組成物を摂取させることを含む、生体内での、幹細胞由来の目的外細胞の形成および/または増殖の抑制方法。
本発明の栄養組成物は、バリンを除く、イソロイシン、ロイシン、メチオニン、リジン、フェニルアラニン、トリプトファン、スレオニンおよびヒスチジンからなる群(特定必須アミノ酸)より選択される1以上の必須アミノ酸を含有し、非必須アミノ酸を任意で含有する、幹細胞から分化した細胞を含む細胞集団において幹細胞由来の目的外細胞の形成および/または増殖を抑制するためのものである。
「バリンを除く、イソロイシン、ロイシン、メチオニン、リジン、フェニルアラニン、トリプトファン、スレオニンおよびヒスチジンからなる群より選択される1以上の必須アミノ酸を含有」するとは、必須アミノ酸のうち、バリンは含有していないこと、かつ「イソロイシン、ロイシン、メチオニン、リジン、フェニルアラニン、トリプトファン、スレオニンおよびヒスチジンからなる群」(特定必須アミノ酸群)のうち、選択される1以上(1種のみでも、複数種でも、全てであってもよい。)を含有し、選択されなかったものは含有しないことを意味する。
「幹細胞から分化した細胞を含む細胞集団」は、典型的には、幹細胞を目的細胞に分化誘導させるための培養工程の途中段階または最終段階において生成する細胞集団であって、幹細胞から分化誘導した目的細胞と、目的細胞に分化できなかった目的外細胞(例、未分化の幹細胞(例、iPS細胞)、培養の途中段階で目的細胞への分化が止まった細胞(例、内胚葉、中胚葉、外胚葉))とが混合した状態の細胞集団である。
ヒト等の哺乳動物に摂取させるための第1栄養組成物の形状は、経口投与または非経口投与が可能な形状であれば特に限定されるものではないが、例えば、固形食、固形剤(例、経口摂取用固形剤、粉末剤)、半固形食(例、ゼリー、流動食)、半固形剤(例、経口摂取用ゼリー剤)、飲料、液剤(例、経口摂取用液剤、非経口摂取用液剤(例、輸液製剤))が挙げられる。
バリン:0mg/kg体重;
イソロイシン:0mg/kg体重~30mg/kg体重、好ましくは0mg/kg体重~20mg/kg体重;
ロイシン:0mg/kg体重~50mg/kg体重、好ましくは0mg/kg体重~40mg/kg体重;
メチオニン:0mg/kg体重~30mg/kg体重、好ましくは0mg/kg体重~15mg/kg体重;
リジン:0mg/kg体重~50mg/kg体重、好ましくは0mg/kg体重~30mg/kg体重;
フェニルアラニン:0mg/kg体重~50mg/kg体重、好ましくは0mg/kg体重~25mg/kg体重;
トリプトファン:0mg/kg体重~30mg/kg体重、好ましくは0mg/kg体重~5mg/kg体重;
スレオニン:0mg/kg体重~30mg/kg体重、好ましくは0mg/kg体重~15mg/kg体重;
ヒスチジン:0mg/kg体重~30mg/kg体重、好ましくは0mg/kg体重~10mg/kg体重。
第1栄養組成物は、アミノ酸以外の栄養素(その他成分)をさらに含んでいてもよい。幹細胞から分化した細胞を含む細胞集団を移植または投与された哺乳動物が、その後一定期間にわたって第1栄養組成物を摂取し続けることを考慮すると、第1栄養組成物は所定のアミノ酸に加えて、アミノ酸以外の栄養素をさらに含み、第1栄養組成物のみでその哺乳動物にとって必要な栄養素をすべて摂取できるような形態とすることが好ましい。
ブタン酸(酪酸、4:0)、ヘキサン酸(カプロン酸、6:0)、ヘプタン酸(7:0)、オクタン酸(カプリル酸、8:0)、デカン酸(カプリン酸、10:0)、ドデカン酸(ラウリン酸、12:0)、トリデカン酸(13:0)、テトラデカン酸(ミリスチン酸、14:0)、ペンタデカン酸(15:0)、ヘキサデカン酸(パルミチン酸、16:0)、ヘプタデカン酸(17:0)、オクタデカン酸(ステアリン酸18:0)、イコサン酸(アラキジン酸、20:0)、ドコサン酸(ベヘン酸、22:0)、テトライコサン酸(リグノセリン酸、24:0)、デセン酸(10:1)、テトラデセン酸(ミリストレイン酸、14:1)、ペンタデセン酸(15:1)、ヘキサデセン酸(パルミトレイン酸、16:1)、ヘプタデセン酸(17:1)、オクタデセン酸(オレイン酸、18:1、n-9)、オクタデセン酸(シス-バクセン酸、18:1、n-7)、イコセン酸(エイコセン酸、20:1)、ドコセン酸(22:1)、テトラコセン酸(24:1)、ヘキサデカジエン酸(16:2)、ヘキサデカトリエン酸(16:3)、ヘキサデカテトラエン酸(16:4)、ヘプタデカジエン酸(17:2)、オクタデカジエン酸(18:2)、オクタデカジエン酸(リノール酸、18:2、n-6)、オクタデカトリエン酸(18:3)、オクタデカトリエン酸(α-リノレン酸、18:3、n-3)、オクタデカトリエン酸(γ-リノレン酸、18:3、n-6)、オクタデカテトラエン酸(18:4、n-3)、イコサジエン酸(エイコサジエン酸、20:2、n-6)、イコサトリエン酸(エイコサトリエン酸、20:3、n-6)、イコサテトラエン酸(エイコサテトラエン酸、20:4、n-3)、イコサテトラエン酸(アラキドン酸、20:4、n-6)、イコサペンタエン酸(エイコサペンタエン酸、20:5、n-3)、ヘンイコサペンタエン酸(21:5、n-3)、ドコサジエン酸(22:2)、ドコサテトラエン酸(22:4、n-6)、ドコサペンタエン酸(22:5、n-3)、ドコサペンタエン酸(22:5、n-6)、ドコサヘキサエン酸(22:6、n-3)。
幹細胞から分化した細胞を含む細胞集団の培養に使用するための第2栄養組成物は、代表的には、細胞の培地の形状をとる。すなわち、第2栄養組成物の形状は、細胞の培養(特に幹細胞から目的細胞を分化誘導するための培養)に一般的に用いられている培地またはその他の公知の培地の形状に準じたものとすることができる。
本発明によるキットは、本発明の栄養組成物、および幹細胞から分化した細胞を含む細胞集団を含む。本明細書において、本発明の栄養組成物との関係で記載した技術的事項は、当該栄養組成物を使用する本発明のキットとの関係においても同様に適用することができる。例えば、本発明のキットは、細胞治療または再生医療の手術において移植のために用いられる細胞集団と、その手術を受けたヒト(患者)またはヒト以外の哺乳動物(実験動物)が移植手術後に摂取するための第1栄養組成物とを含むものとすることができる。
本試験例において用いるマウスは、ヒトiPS細胞を移植するに際して、異種細胞移植となることから、免疫不全マウス雄性NOD/Shi-scid-IL2Rγnullマウス(以下、「NOGマウス」)を利用する。これらはヒトiPS細胞の移植実験で広く用いられている動物種である(K.Miura, et al. Nat Biotechnol (2009), 27:743-5)。該マウスは実験動物中央研究所から入手した。
以下の試験例において、固形飼料のコントロールとしてリサーチダイエット社A10021Bを用いた。この飼料をベースに各種アミノ酸を抜いた固形飼料、A05080209(バリン欠乏飼料)(リサーチダイエット社)、A05080220(非必須アミノ酸欠乏飼料)(リサーチダイエット社)を作製した。これらA10021B、A05080209、A05080220は3.87 kCal/gでエネルギー量は統一されている。セリンおよびグリシン欠乏飼料としてはTest diet社(Mod TestDiet (登録商標) 5CC7 w/ No Added Serine or Glycine, 5BJX 5CC7, 3.97 kCal/g)を用いた。各飼料の組成を下記表に示す。
*2 Vitamin Mix V10001の組成(当該Mix 10gあたりの各成分の重量):ビタミンAパルミテート(20,000 IU)、ビタミンD3(1,000 IU)、ビタミンE酢酸塩(50 IU)、メナジオンナトリウムビサルファイト(0.5 mg)、ビオチン(0.3 mg)、シアノコバラミン(10 μg)、葉酸(6 mg)、ニコチン酸(30 mg)、パントテン酸カルシウム(30 mg)、ピリドキシン塩酸塩(6 mg)、リボフラビン(6 mg)、チアミン塩酸塩(6 mg)、アスコルビン酸(500 mg)、スクロース(9.7842 g)
*4 Baker Amino Acid Mineral Premixの成分:コーンスターチ、リン酸カルシウム、リン酸カリウム、塩化ナトリウム、炭酸カルシウム、硫酸マグネシウム、クエン酸鉄、硫酸マグネシウム、炭酸亜鉛、モリブデン酸ナトリウム、ホウ酸、ヨウ化カリウム、硫酸銅、セレン酸ナトリウム、硫酸コバルト
*5 Baker AA Premix / No Ser or Gly:L-リシン一塩酸塩、L-ロイシン、L-アルギニン-HCl、L-アラニン、L-アスパラギン、グルタミン酸、L-グルタミン、L-プロリン、L-フェニルアラニン、L-バリン、L-スレオニン、L-イソロイシン、L-メチオニン、L-ヒスチジン-HCl-H2O、L-チロシン、L-システイン、L-トリプトファン
実験に使用するNOGマウスは6週齢で入荷し、入荷後1週間の馴化飼育期間を経て使用した。体重を測定し、1.5-2.0%のイソフルラン吸入麻酔下において背部中央右側または背部中央左側より切開し、腎臓を露出させた。腎被膜下に注射針を用いてヒトiPS細胞1383D2株(京都大学iPS細胞研究所から入手)(100万細胞)を腎被膜下に移植した。合計18匹のマウスにiPS細胞を移植し、4匹のマウスは手術処置は同様にするが、移植のみおこなわないSham群として用いた。その後、腎臓を腹部に戻して縫合した。麻酔から覚醒したことを確認してケージに戻した(3匹/ケージ, Sham群のみ2匹/ケージ)。その後移植群18匹をそれぞれコントロール飼料(6匹)、バリン欠乏飼料2群(6匹×2)に分割し、Sham群4匹にはバリン欠乏飼料を給餌した。1週間毎に飼料を新しいものに取替え、3週間目に体重を測定し、体重低下の回復のためバリン欠乏飼料2群(6匹×2)の飼料をコントロール飼料に変更した。翌週移植4週後にバリン欠乏飼料1群(6匹)の飼料を再びバリン欠乏飼料に戻した。その後この群は実験終了まで1週間毎にバリン欠乏飼料とコントロール飼料を交互に給餌した。3週前でコントロール飼料に戻した別のバリン欠乏飼料1群(6匹)についてはこの後実験終了までコントロール飼料を給餌した。移植後68日目に該マウスを麻酔下で解剖し、移植腎と移植していない反対側の腎臓の双方の重量を測定し、その差をテラトーマ重量として算出した。
実験に使用するNOGマウスは6週齢で入荷し、入荷後1週間の馴化飼育期間を経て使用した。体重を測定し、1.5-2.0%のイソフルラン吸入麻酔下において背部中央右側または背部中央左側より切開し、腎臓を露出させた。腎被膜下に注射針を用いてヒトiPS細胞1383D2株(京都大学iPS細胞研究所から入手)(500万細胞)を腎被膜下に移植した。合計18匹のマウスにiPS細胞を移植し、4匹のマウスは手術処置は同様にするが、移植のみおこなわないSham群として用いた。その後、腎臓を腹部に戻して縫合した。麻酔から覚醒したことを確認してケージに戻した(3-4匹/ケージ, Sham群のみ2-4匹/ケージ)。その後移植群20匹をそれぞれコントロール飼料(10匹)、セリン・グリシン欠乏飼料群(10匹)に分割し、Sham群5匹にはセリンおよびグリシン欠乏飼料を給餌した。1週間毎に飼料を新しいものに取替え、移植後7, 14, 28, 48日目に体重を測定し、移植後48日目に該マウスを麻酔下で解剖し、移植腎と移植していない反対側の腎臓の双方の重量を測定し、その差をテラトーマ重量として算出した。
実験に使用するNOGマウスは8週齢で入荷し、入荷後1週間の馴化飼育期間を経て使用した。体重を測定し、1.5-2.0%のイソフルラン吸入麻酔下において背部中央右側または背部中央左側より切開し、腎臓を露出させた。腎被膜下に注射針を用いてヒトiPS細胞1383D2株(京都大学iPS細胞研究所から入手)(500万細胞)を腎被膜下に移植した。合計15匹のマウスにiPS細胞を移植した。その後、腎臓を腹部に戻して縫合した。麻酔から覚醒したことを確認してケージに戻した(2-4匹/ケージ)。その後移植群15匹をそれぞれコントロール飼料(5匹)、非必須アミノ酸(アスパラギン、アスパラギン酸、アラニン、アルギニン、グリシン、グルタミン、グルタミン酸、システイン、セリン、チロシンおよびプロリン)欠乏飼料群(10匹)に分割した。1週間毎に飼料を新しいものに取替え、移植後3, 10, 24, 43, 50日目に体重を測定し、移植後50日目に該マウスを麻酔下で解剖し、移植腎と移植していない反対側の腎臓の双方の重量を測定し、その差をテラトーマ重量として算出した。
(1)ヒトiPS細胞の培養
ヒトiPS細胞(1383D2;京都大学iPS研究所)をLaminin-511コーティング上にStemFit AK02Nで播種1日後に、以下の培地に変更し、培地交換2日後に細胞生存率をCell-Titer Glo(Promega)で測定した。
バリン含有培地:DMEM/F-12(Gibco),E8 supplement(Thermo)。
バリン不含培地:DMEM/F-12(-Val)(機能ペプチド研究所、特注),E8 supplement(Thermo)。
結果を図4に示す。バリン不含培地で培養したヒトiPS細胞は培地交換2日後にはほとんど生存が認められなかった。
(1)ヒト血管内皮細胞(human endothelial cell;EC)の作製
ヒトiPS細胞(1383D2;京都大学iPS研究所)を、DMEM/F-12(Gibco)(10ml)に1% B-27 Supplements(GIBCO)、BMP4(25ng/ml)およびCHIR99021(8μM)を添加した培地中、5%CO2、37℃で3日間培養することで中胚葉系細胞を誘導した。得られた中胚葉系細胞をさらに、Stempro-34 SFM(Gibco)(10ml)にVEGF(200ng/ml)およびFolskolin(2μM)を添加した培地中、5%CO2、37℃で7日間培養することで、CD31陽性、CD73陽性およびCD144陽性のヒト非造血性血管内皮細胞集団を得た。
ヒトiPS細胞(1383D2)を、RPMI 1640(富士フィルム)(2ml)にWnt3a(50ng/mL)およびアクチビンA(100ng/ml)を添加した培地中、5%CO2、37℃で5日間培養することで、内胚葉系細胞を誘導した。得られた内胚葉系細胞を、同培地に1%B27 Supplements(GIBCO)およびFGF2(10ng/ml)を添加した上で、5%CO2、37℃で、さらに5日間培養することで、AFP、ALBおよびHNF4αが陽性のヒト肝臓内胚葉細胞集団を得た。
ヒトiPS細胞(1383D2)を、DMEM/F-12(Gibco)(10ml)に1% B-27 Supplement(GIBCO)、BMP4(25ng/ml)およびCHIR99021(8μM)を添加した培地中、5%CO2、37℃で3日間培養することで中胚葉系細胞を誘導した。得られた中胚葉系細胞を、同培地にPDGFBB(10ng/ml)およびアクチビンA(2 ng/ml)を添加した上で、5%CO2、37℃で、さらに3日間培養した。その後、DMEM/F-12(Gibco)(10ml)に1% B-27 Supplements(GIBCO)、FGF2(10 ng/ml)およびBMP4(12ng/ml)を添加した培地中、5%CO2、37℃で、さらに3日間培養することで、ヒト間葉系幹細胞を得た。
作製したヒト肝臓内胚葉細胞(HE)、ヒト血管内皮細胞(EC)、ヒト間葉系幹細胞(MC)およびヒトiPS細胞(1383D2)を10:7:1:5の割合の細胞数(総数2.3×106個)で混合し、三次元培養容器Elplasia(クラレ)上で一日間、5%CO2、37℃で共培養することで凝集体を作製した。この共培養において、培養培地は、HCM(Lonza)にFBS(5%)、HGF(10ng/ml)、OSM(20ng/ml)およびDex(100nM)を加えた肝臓細胞用培地(A)と、Stempro-34 SFM(Gibco)にVEGF(50ng/ml)およびFGF2(10ng/ml)を加えた血管内皮細胞用培地(A)を、1:1の体積割合で混合したもの(本明細書中「オルガノイド用培地(A)」という)を用いた。共培養1日後にオルガノイド用培地(A)を以下の培地に変更し、培地交換1日後に細胞生存率をFACS fortessaで測定した。
バリン含有培地:DMEM/F-12(Gibco)にKSR(5%)、HGF(10ng/ml)、OSM(20ng/ml)およびDex(100nM)を加えた肝臓細胞用培地(B)に、上記血管内皮細胞用培地(A)を、1:1の体積割合で混合したもの。
バリン不含培地:DMEM/F-12(-Val)(機能ペプチド研究所、特注)にKSR(5%)、HGF(10ng/ml)、OSM(20ng/ml)およびDex(100nM)を加えた肝臓細胞用培地(B’)に、上記血管内皮細胞用培地(A)を、1:1の体積割合で混合したもの。
結果を図5に示す。オルガノイドとともに培養したヒトiPS細胞は、バリン不含培地では培地交換1日後でバリン含有培地の1/3に減少していた。
Claims (11)
- バリンを除く、イソロイシン、ロイシン、メチオニン、リジン、フェニルアラニン、トリプトファン、スレオニンおよびヒスチジンからなる群より選択される1以上の必須アミノ酸を含有し、非必須アミノ酸を任意で含有する、幹細胞から分化した細胞を含む細胞集団において幹細胞由来の目的外細胞の形成および/または増殖を抑制するための、栄養組成物。
- 必須アミノ酸として、少なくともメチオニンを含有する、請求項1に記載の栄養組成物。
- 非必須アミノ酸を含有しない、請求項1に記載の栄養組成物。
- アルギニン、グリシン、セリン、アスパラギンおよびグルタミンからなる群より選択される1以上の非必須アミノ酸を含有する、請求項1に記載の栄養組成物。
- アミノ酸以外の栄養素をさらに含む、請求項1に記載の栄養組成物。
- 11日間以上摂取される、請求項1に記載の栄養組成物。
- 栄養組成物が、1)固形食、固形剤、半固形食、半固形剤、飲料、液剤から選ばれるものであるか、または2)培地である、請求項1に記載の栄養組成物。
- 請求項1記載の栄養組成物、および幹細胞から分化した細胞を含む細胞集団を含む、キット。
- 幹細胞から分化した細胞を含む細胞集団に、請求項1に記載の栄養組成物を摂取させることを含む、幹細胞由来の目的外細胞の形成および/または増殖の抑制方法。
- 幹細胞から分化した細胞を含む細胞集団において幹細胞由来の目的外細胞の形成および/または増殖を抑制するための、請求項1に記載の栄養組成物の使用。
- 幹細胞から分化した細胞を含む細胞集団が移植または投与された哺乳動物に、請求項1に記載の栄養組成物を摂取させることを含む、生体内での、幹細胞由来の目的外細胞の形成および/または増殖の抑制方法。
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| CN117017929A (zh) * | 2023-09-11 | 2023-11-10 | 山东奥克斯畜牧种业有限公司 | 一种用于提高采卵效果的组合物及其制备方法和应用 |
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| WO2022130162A1 (en) * | 2020-12-14 | 2022-06-23 | Clear Meat Private Limited | A supplement composition for cell culture |
| CN117017929A (zh) * | 2023-09-11 | 2023-11-10 | 山东奥克斯畜牧种业有限公司 | 一种用于提高采卵效果的组合物及其制备方法和应用 |
Also Published As
| Publication number | Publication date |
|---|---|
| US20220135938A1 (en) | 2022-05-05 |
| EP3868869A4 (en) | 2022-08-03 |
| JPWO2020080270A1 (ja) | 2021-09-16 |
| EP3868869A1 (en) | 2021-08-25 |
| JP7553918B2 (ja) | 2024-09-19 |
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