WO2005123904A1 - 霊長類動物胚性幹細胞からの血管内皮細胞の製造方法 - Google Patents
霊長類動物胚性幹細胞からの血管内皮細胞の製造方法 Download PDFInfo
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- WO2005123904A1 WO2005123904A1 PCT/JP2005/010962 JP2005010962W WO2005123904A1 WO 2005123904 A1 WO2005123904 A1 WO 2005123904A1 JP 2005010962 W JP2005010962 W JP 2005010962W WO 2005123904 A1 WO2005123904 A1 WO 2005123904A1
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- 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
- C12N5/00—Undifferentiated human, animal or plant cells, e.g. cell lines; Tissues; Cultivation or maintenance thereof; Culture media therefor
- C12N5/06—Animal cells or tissues; Human cells or tissues
- C12N5/0602—Vertebrate cells
- C12N5/069—Vascular Endothelial cells
- C12N5/0691—Vascular smooth muscle cells; 3D culture thereof, e.g. models of blood vessels
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P9/00—Drugs for disorders of the cardiovascular system
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- 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
- C12N5/00—Undifferentiated human, animal or plant cells, e.g. cell lines; Tissues; Cultivation or maintenance thereof; Culture media therefor
- C12N5/06—Animal cells or tissues; Human cells or tissues
- C12N5/0602—Vertebrate cells
- C12N5/069—Vascular Endothelial cells
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K35/00—Medicinal preparations containing materials or reaction products thereof with undetermined constitution
- A61K35/12—Materials from mammals; Compositions comprising non-specified tissues or cells; Compositions comprising non-embryonic stem cells; Genetically modified cells
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
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- C12N2506/00—Differentiation of animal cells from one lineage to another; Differentiation of pluripotent cells
- C12N2506/02—Differentiation of animal cells from one lineage to another; Differentiation of pluripotent cells from embryonic cells
Definitions
- the present invention relates to a method for differentiating primate embryonic stem cells into vascular endothelial cells and a technique using the same. More specifically, the present invention provides a method for differentiating primate embryonic stem cells into vascular endothelial cells (for example, early-stage vascular endothelial cells, etc.) Method for producing, method for amplifying early-stage vascular endothelial cells, method for treating early-stage vascular endothelial cells obtained by the method, agent for treating vascular injury, method for regenerating blood vessels, use of the early-stage vascular endothelial cells, improvement of local blood flow
- the present invention relates to a condition in which a therapeutic effect can be expected by doing so, a method for treating Z or a disease, a method for constructing a vascular structure, and the like. Background art
- Non-Patent Document 1 Non-Patent Document 1
- VEGF vascular endothelial growth factor
- bFGF basic fibroblast growth factor
- HGF liver growth factor
- Non-Patent Document 1 Pera et al., Journal of Cell Science, 113, 5-10 (2000) Disclosure of Invention
- the present invention relates to providing means for dividing primate embryonic stem cells into vascular endothelial cells or early-stage vascular endothelial cells or a technique using the same.
- the present invention relates to performing long-term culture, subculturing, growing in vitro, engrafting with high efficiency, obtaining high suitability for an individual, and obtaining To provide vascular endothelial cells in the early stage of development that at least achieve at least one of generating vascular endothelial cells, improving the local blood flow, and achieving a therapeutic effect and treating Z or disease, etc.
- vascular endothelial cells Supplying a large amount of the vascular endothelial cells in the early stage of development; providing a material that can be expected to have a therapeutic effect by improving local blood flow, and providing a material for treating Z or a disease; a primate animal Early development from primate embryonic stem cells can achieve at least one of factors such as evaluating factors that exert a function in the process of dividing embryonic stem cells into embryonic endothelial cells. Relates to providing the minute I ⁇ method to the vascular endothelial cells.
- the present invention relates to performing long-term culture, subculturing, growing in vitro, engrafting with high efficiency, obtaining high suitability to an individual, obtaining Therefore, it has the excellent property of generating vascular endothelial cells, improving the local blood flow, and at least enabling the treatment effect to be expected and the treatment of Z or disease.
- Providing a method for producing early-stage vascular endothelial cells which can at least achieve any of providing a material and the like.
- the present invention at least achieves at least one of supplying a large amount of early-stage vascular endothelial cells, obtaining substantially uniform quality early-stage vascular endothelial cells, and the like. , An early stage of development of vascular endothelial cells.
- a method for efficiently treating vascular damage treating a condition where a therapeutic effect can be expected by improving local blood flow, and treating Z or a disease. It is intended to provide a therapeutic agent for treating vascular injury, which can at least achieve any of them.
- the present invention provides a method of performing long-term culture, subculturing, growing in vitro, engrafting with high efficiency, obtaining high suitability for an individual, Vascular endothelial cells that at least achieve at least one of generating vascular endothelial cells, improving the local blood flow, and achieving a therapeutic effect and treating Z or disease, etc.
- the present invention provides a method for treating a damaged portion of a blood vessel, treating a condition in which a therapeutic effect can be expected by improving local blood flow, and treating Z or a disease.
- the present invention relates to providing a blood vessel regenerating method that at least achieves displacement, such as regenerating a blood vessel in a place where a pipe needs to be regenerated.
- the present invention provides a method for obtaining high engraftment efficiency, obtaining high suitability for an individual, and having the transplanted initial vascular endothelial cell force in an individual transport the individual with the blood vessel of the individual.
- An object of the present invention is to provide a transplantation method that at least achieves any of the steps of generating a functional blood vessel.
- a blood vessel which is capable of treating a condition and a Z or a disease, for example, an ulcer, an ischemic disease, etc., in which a therapeutic effect can be expected by improving local blood flow.
- the present invention relates to providing a method for treating injury.
- the present invention relates to a condition for which a therapeutic effect can be expected by improving local blood flow, and a method for producing a medicament capable of treating Z or a disease.
- the present invention relates to the use of an early-stage vascular endothelial cell obtained by the production method.
- the present invention provides a method for constructing a vascular structure, obtaining a vascular structure exhibiting high compatibility with an individual, obtaining a vascular structure that can be engrafted with high efficiency, and the like. At least one of the following can be achieved: a state in which a therapeutic effect can be expected by improving local blood flow; and provision of a material for treating Z or a disease. And a method of constructing a vascular structure. [0017] Further objects of the present invention are apparent from the description in this specification.
- the gist of the present invention is as follows.
- a method for differentiating primate embryonic stem cells into vascular endothelial cells at an early stage of development comprising differentiating primate embryonic stem cells into a vascular endothelial cell marker-positive cell group
- step (II) a step of substantially separating vascular endothelial cell marker-positive cells from the cell group A obtained in the step (I);
- a therapeutic agent for vascular damage comprising as an active ingredient an early-stage vascular endothelial cell obtained by differentiating a primate embryonic stem cell,
- a method for regenerating a blood vessel comprising supplying an early-stage vascular endothelial cell obtained by the production method according to the above (3) or (4) to a site requiring revascularization,
- a method for constructing a vascular structure comprising culturing an early-stage vascular endothelial cell obtained by differentiating a primate embryonic stem cell in an environment suitable for angiogenesis.
- step (II) a step of substantially separating vascular endothelial cell marker-positive cells from the cell group A obtained in the step (I);
- the invention's effect [0019] According to the method for differentiating primate embryonic stem cells into vascular endothelial cells in the early stage of development according to the present invention, long-term culture, subculture, and growth in the in vivo mouth are possible, and high engraftment efficiency and individual Highly compatible, can generate vascular endothelial cells in individuals, and has the excellent property of being able to treat conditions or Z or diseases that can be expected to have therapeutic effects by improving local blood flow.
- an excellent effect of being able to supply a large amount of early-stage vascular endothelial cells having Further, according to the differentiation method of the present invention, there is an excellent effect that a state where a therapeutic effect can be expected by improving local blood flow and a material for treating Z or a disease can be provided. . Further, according to the differentiation method of the present invention, an excellent effect that a factor exerting a function in a differentiation process from a primate embryonic stem cell to a vascular endothelial cell at an early stage of development can be evaluated is provided.
- the method for producing early-stage vascular endothelial cells of the present invention an excellent effect of being able to supply a large amount of early-stage vascular endothelial cells having the above properties can be obtained. Further, according to the production method of the present invention, it is possible to stably provide a large amount of a material that can be expected to have a therapeutic effect by improving local blood flow, and a material for treating Z or a disease. And, it has an excellent effect.
- the early-stage vascular endothelial cells of the present invention have an excellent effect that they can be cultured and passaged for a long period of time and can be proliferated in vitro. Further, according to the early stage vascular endothelial cells of the present invention, there is an excellent effect that they can be engrafted in a living body with high efficiency. According to the early stage vascular endothelial cells of the present invention, they can be used in individuals with high compatibility, can generate vascular endothelial cells in individuals, and can be expected to have therapeutic effects by improving local blood flow. It has an excellent effect of enabling treatment of Z or a disease.
- the therapeutic agent for vascular damage of the present invention has an excellent effect that vascular damage can be efficiently treated. Furthermore, according to the therapeutic agent for vascular damage of the present invention, it is possible to improve the local blood flow to treat a condition that can be expected to have a therapeutic effect, Z or a disease, etc.! According to the revascularization method of the present invention, it is possible to treat a damaged site of a blood vessel and improve a local blood flow to treat a condition or a Z or a disease that can be expected to have a therapeutic effect. If a blood vessel can be regenerated at a site requiring regeneration, an excellent effect can be obtained.
- a functional method having a high engraftment efficiency and a high suitability for an individual having a communication from the transplanted early-stage vascular endothelial cells to the individual's own blood vessels in the individual.
- An excellent effect is obtained in which a blood vessel can be generated and a local therapeutic effect can be expected by improving local blood flow, and treatment of Z or disease can be achieved.
- a drug that can be expected to have a therapeutic effect by improving local blood flow, and that is capable of treating Z or a disease is produced. It has an excellent effect that it can be performed.
- vascular injury of the present invention a condition and a Z or a disease that can be expected to have a therapeutic effect by improving local blood flow, for example, ulcer, ischemic disease, obstructive arterial sclerosis, etc. It has an excellent effect that it can be treated.
- a vascular structure of the present invention According to the method of constructing a vascular structure of the present invention, it is possible to construct a vascular structure exhibiting high and efficient engraftment and exhibiting high and suitability for an individual, and thereby achieve an excellent effect. Play. ADVANTAGE OF THE INVENTION According to the method of constructing a vascular structure of the present invention, an excellent effect that a therapeutic effect can be expected by improving local blood flow and a material for treating Z or a disease can be provided. Play.
- FIG. 1 is a diagram showing changes in the appearance of a skin ulcer site in a skin ulcer model mouse.
- Panel (A) shows the appearance change on day 3 after transplantation of VE cadherin positive cells (early human vascular endothelial cells), and panel (B) shows the macroscopic findings on day 6.
- the skin ulcer site on the left is the site where VE-cadherin-positive cells (early-stage vascular endothelial cells) were transplanted, and the skin ulcer site on the right was where the VE-cadherin-positive cells were not transplanted and phosphate buffered. This is the site where no saline was injected (untreated).
- FIG. 2 is a view showing the area of skin ulcer after transplantation of VE-cadherin-positive cells (human early-stage vascular endothelial cells) in a skin ulcer model mouse.
- Panel (A) shows transplant 3 A comparison of the skin ulcer area on day 6 is shown, and panel (B) shows a comparison of the skin ulcer area on day 6 after transplantation.
- VPC indicates the skin ulcer area on the side where VE-cadherin-positive cells are transplanted
- PBS indicates the skin ulcer area on the side where phosphate buffered saline was injected (untreated).
- p is 0.05.
- the results shown by the powerful figures are the results of investigations on 11 cases.
- FIG. 3 shows a tissue section of skin at a cell transplant site in a skin ulcer model mouse transplanted with VE-cadherin-positive cells (early human vascular endothelial cells).
- red indicates Dil-labeled transplanted cells (VE cadherin-positive cells)
- green indicates vascular endothelial cells present in the blood vessels of KSN nude mice labeled (stained) with ISOLECTIN B4 (trade name). Vesicles.
- the yellow area indicates that the transplanted VE cadherin-positive cells (red) are judged to have blood vessels and traffic in KSN nude mice (green).
- Scale bar is 100 ⁇ m.
- FIG. 4 is a diagram showing an outline of the transplantation of VE cadherin-positive cells into the femoral artery of a KSN nude mouse.
- Panel (A) shows the location where the right thigh of the KSN nude mouse was vertically incised to expose the femoral artery and vein, and panels (B) and (C) are shown in panel (A) above. At the point, the process of exposing the femoral artery is shown, and panel (D) shows the process of injecting cells into the femoral artery.
- FIG. 5 is a view showing the results of measuring the effect of improving blood flow by transplantation of VE-cadherin-positive cells (early human vascular endothelial cells) using a laser Doppler blood flow meter.
- 1) is p ⁇ 0.05, 2) 05, ⁇ ⁇ 0.01, 3) ⁇ ⁇ 0.001.
- FIG. 6 is a diagram showing the results of examining the engraftment of transplanted cells in the ischemic lower leg muscle on day 7 after transplantation of VE-cadherin-positive cells (early human endothelial endothelial cells). It is.
- the red color indicates Dil-labeled transplanted cells (VE cadherin-positive cells)
- the green color indicates the blood vessels in the blood vessels of KSN nude mice labeled (stained) with ISOLECT IN B4 (trade name). 1 shows skin cells.
- the yellow area indicates that the transplanted VE cadherin-positive cells (red) are determined to have been taken into the blood vessels (green) of the KSN nude mouse.
- FIG. 7 is a diagram showing the results of immunohistological analysis of the ischemic leg muscles 42 days after transplantation of VE-cadherin-positive cells (human early-stage vascular endothelial cells).
- Panel (A) shows the tissue (control group) of KSN nude mice injected with phosphate-buffered saline without transplanting VE-cadherin-positive cells (control group), and panel) shows VE-cadherin-positive cells.
- the tissue of the transplanted KSN nude mouse is shown.
- green indicates mouse PECAM1 and red indicates human PECAM1.
- the scale bar is 100 m.
- FIG. 8 shows the uptake of VE-cadherin-positive cells into the blood vessels of the ischemic lower leg muscle on day 7 after transplantation of VE-cadherin-positive cells (early human vascular endothelial cells).
- the present invention is based on the finding that cells obtained by differentiating VE-cadherin-positive cells from primate embryonic stem cells as a vascular endothelial cell at an early stage of development develop well when transplanted into a living body, and are functionally functional. Based on our findings that blood vessels are constructed.
- One aspect of the present invention is to differentiate primate embryonic stem cells into vascular endothelial cell marker-positive cells, wherein the primate embryonic stem cells are capable of developing primary endothelial endothelial cells. It relates to the differentiation method.
- Early-stage vascular endothelial cells obtained by the differentiation method of the present invention have excellent properties that they can be cultured and passaged for a long period of time and can be grown in vitro.
- the early-stage vascular endothelial cells obtained by the differentiation method of the present invention are obtained by sorting from a desired animal species, for example, embryonic stem cells such as humans and monkeys, they can be used in living organisms. It has excellent properties such as high engraftment efficiency and high compatibility with individuals.
- the early stage vascular endothelial cells obtained by the method of the present invention have an excellent property that vascular endothelial cells can be generated in an individual. Therefore, according to the cells obtained by the differentiation method of the present invention, it is possible to treat a condition, a Z, or a disease in which a therapeutic effect can be expected by improving local blood flow.
- primate embryonic stem cells that can be expanded indefinitely by self-replication particularly human embryonic stem cells
- early-stage vascular endothelial cells of substantially uniform quality can be obtained in large quantities. Therefore, according to the differentiation method of the present invention, a vascular structuring material suitable for use in the field of regenerative medicine, a condition in which a therapeutic effect can be expected by improving local blood flow, and a method for treating Z or disease. Material and the like can be efficiently and stably supplied in large quantities.
- primate embryonic stem cells since primate embryonic stem cells are used, primate animals, for example, humans and monkeys, preferably human organisms, can be efficiently treated. Early-stage vascular endothelial cells that can be engrafted and have high compatibility can be obtained.
- condition and Z or disease in which a therapeutic effect can be expected by improving local blood flow include, for example, ulcer, obstructive arteriosclerosis, ischemic heart disease, cerebrovascular disease, and the like. Disorders, Barge's disease, skin ulcers and the like.
- vascular endothelial cell means a concept including early-stage vascular endothelial cells and mature vascular endothelial cells, unless otherwise specified.
- the term “early developmental endothelial cells” refers to VE-cadherin (Vascular Endothelial-cadherin) positive and CD34-positive and VEGF (Vascular Endothelial Growth Factor) differentiated from primate embryonic stem cells.
- R2 positive and PECA M Platinum and Endothelial Cell Adhesion Molecule 1 positive cells.
- the “early-stage vascular endothelial cells” are different from completely mature vascular endothelial cells in adults, and have properties such as constructing a functional blood vessel and improving blood flow when transplanted into a living body.
- mature vascular endothelial cells refers to cells that exhibit properties equivalent to those of fully mature adult vascular endothelial cells.
- primaryate refers to humans, monkeys, and the like.
- examples of the monkey include, but are not particularly limited to, monkeys such as cynomolgus monkeys, macaques, Japanese macaques, and marmosets.
- the term "primate embryonic stem cell” refers to an undifferentiated cell having pluripotency and self-renewal ability. More specifically, the primate embryonic stem cells include alkaline phosphatase (ALP) activity positive, SSEA (Stage Specific Embrvonic Anion). (tigen) -3 cells, SSEA-4 cells, TRA (Tumor Rejection Antigen) 1-60 cells, TRA1-81 cells.
- ALP alkaline phosphatase
- SSEA Serial Exponase
- tigen Strejection Antigen
- TRA1-81 cells TRA1-81 cells.
- the above-mentioned properties are based on immunostaining using a conventional antibody, for example, an anti-SSEA-1 antibody, an anti-SSEA-3 antibody, an anti-SSEA-4 antibody, an anti-TRA1-60 antibody, an anti-TRA1-81 antibody, or the like.
- Alkaline phosphatase activity can be confirmed by a method such as a method for detecting alkaline phosphatase using a means for measuring alkaline phosphatase activity ⁇ eg, a commercially available ALP assay kit (manufactured by Sigma) or the like ⁇ .
- the immunostaining can be carried out by a conventional procedure (for example, see Hirashima et al., Blood, 93, 1253-1263 (1999)).
- undifferentiated primate embryonic stem cell markers include, for example, ALP, SSEA-3, SSEA-4, TRA1-60, TRA1-81 and the like. Can be
- vascular endothelial marker used in the present invention examples include those usually used in the art.
- examples of the vascular endothelial marker include VE cadherin, CD34, and PECAM1. Among them, VE cadherin is preferred.
- Primate embryonic stem cells used in the present invention include, for example, CMK
- the primate embryonic stem cells can be maintained in an undifferentiated state according to, for example, the literature by Hirofumi Suemori et al., The literature by Benjaminy.
- the primate embryonic stem cells can be maintained, proliferated, or supplied by culturing them in an embryonic stem cell culture medium using an appropriate feeder cell.
- the feeder cell used for maintaining and expanding the undifferentiated state of the embryonic stem cell may be any cell that is commonly used for culturing embryonic stem cells.
- As the feeder cells for example, primary cultured cells of mouse fetal fibroblasts on days 12 to 16 of gestation, STO cells as a mouse fetal fibroblast cell line, etc. are treated with mitomycin C or X-ray. And the like.
- a feeder used for maintaining and expanding the undifferentiated state of the embryonic stem cell One cell has different power depending on the cell type. For example, when fibroblasts derived from mouse fetus are used as feeder cells, 0.1% by weight aqueous gelatin solution ⁇ derived from skin, eg, gelatin manufactured by SIGMA, etc. The fibroblasts derived from the mouse embryos are treated with mitomycin C or irradiated with X-rays on a 10 cm dish coated with ⁇ , and cultured until they become confluent.
- Culture conditions for the feeder cell may vary depending on the type of the cell.
- the medium used for maintaining and growing the undifferentiated state of the embryonic stem cells is not particularly limited.
- conventional culture media depending on the animal species serving as the source of the embryonic stem cells to be used are used. May be used.
- the media components vary depending on the type of embryonic stem cells.
- ⁇ -mercaptoethanol, non-essential amino acids, serum or serum replacement eg, 20% by weight KNOCKOUT- TM Serum Replacement
- serum or serum replacement eg, 20% by weight KNOCKOUT- TM Serum Replacement
- j8 - mercaptoethanol and non essential amino acids and serum or serum replacement ⁇ e.g., in Bitorojen (Invitrogen) Co., 20 weight 0/0 KNOCKOUT- TM Serum Replacement ⁇ .
- Culture conditions for maintaining and expanding the undifferentiated state of the primate embryonic stem cells may vary depending on the type of embryonic stem cells.
- embryonic stem cells preferably 5% by volume In the gas phase of CO, at 36-38 ° C, more preferably at 37 ° C,
- the culture conditions can be set by appropriately changing the range within which the cells can survive and proliferate.
- the primate embryonic stem cells are monkey embryonic stem cells
- appropriate means for example, a reagent suitable for dissociation between cells ⁇ for example, manufactured by Gibco, trade name: Deisoshation Buffer , Collagenase, dispase, trypsin, etc. It is desirable that the cells be treated and dissociated from each other.
- appropriate means such as dissociation between cells can be used.
- a small lump obtained by treatment with a reagent ⁇ e.g., collagenase, dispase, etc.
- the feeder cell has an ability to induce differentiation into vascular endothelial cells, and from the viewpoint of securing the engraftment of cells, promotes the differentiation of embryonic stem cells into blood vessels and blood cells, Any cell that expresses various physiologically active substances and adhesion factors!
- the feeder cells include stromal cells such as calvarial fibroblasts. Specific examples include the OP9 cell line.
- primate embryonic stem cells are co-cultured with a feeder cell under conditions suitable for inducing differentiation, whereby primate embryonic stem cells are It can be differentiated into a vascular endothelial cell marker positive cell group.
- the co-culture of the primate embryonic stem cells and the feeder cells is performed, for example, by seeding the primate embryonic stem cells on one of the feeders to induce differentiation. It can be performed by culturing under suitable conditions.
- the amount of primate embryonic stem cells to be seeded is, for example, in the case of sal embryonic stem cells, preferably 2 ⁇ Desirably, 10 4 cells to 5 ⁇ 10 5 cells.
- the number of cells cannot be counted and it may be difficult to accurately determine the number of cells.However, this is equivalent to the passage of normal embryonic stem cells. It is desirable to seed at a cell density of
- the culture conditions at the time of inducing induction vary depending on the type of embryonic stem cells.
- embryonic stem cells preferably in the gas phase of 5% by volume CO. , 36
- the medium used for the co-culture may be selected as appropriate depending on the type of embryonic stem cells, as long as medium suitable for differentiation of said embryonic stem cells Yogu example, 5 X 10- 5 M 2-mercapto An aliquot culture solution such as a MEM containing ethanol and 10% by weight serum can be used.
- the culture vessel used in the co-culture may be any culture vessel suitable for cell culture. Examples thereof include a 6cm diameter tissue culture dish and a 10cm diameter tissue culture dish.
- the concentration of serum in the medium can be appropriately set, but is preferably about 10% by weight.
- a functionally equivalent substance for example, a serum substitute or the like may be used instead of the serum.
- the vascular endothelial cell marker-positive cell group A is obtained, for example, by means of an antibody against the vascular endothelial marker, for example, immunostaining, flow cytometry, or the like. It can be confirmed by including a cell marker positive cell as an index.
- the antibody may be a commercially available antibody, an antibody produced by a conventional technique, or a fragment of an antibody fragment thereof.
- the vascular endothelial cell marker-positive cells are substantially separated from the cell group A obtained in the step (I) ⁇ step ( ⁇ ) ⁇ .
- the separation of the vascular endothelial cell marker-positive cells is carried out by a suitable cell sorting means, for example, cell sorting by conventional flow cytometry ⁇ FACS (Fluorescent Cell Activated Cell Sorter) ⁇ .
- Cell sorting by MACS (Magnetic Activated Cell Sorter) and the like In the FACS, cells of interest may be sorted using a label of a labeled antibody suitable for sorting as an index.
- the target cells can be sorted by binding the magnetic beads holding antibodies suitable for sorting to the target cells, and collecting the magnetic beads.
- Examples of the antibody used in the cell sorting include at least one antibody against a vascular endothelial cell marker.
- a cell group is suspended in an appropriate solution to obtain a cell suspension having an appropriate cell concentration, and the obtained cell suspension is supplied to a flow cytometer. Then, by performing cell sorting, target cells can be sorted.
- the "suitable solution” used for suspending the cells may be any solution suitable for performing flow cytometry and cell sorting, for example, phosphate buffered saline (PBS), Hank's buffer (HBSS) and the like.
- PBS phosphate buffered saline
- HBSS Hank's buffer
- the cell concentration in the cell suspension is appropriately set according to the cell sorting equipment used in flow cytometry and cell sorting as long as the cell concentration is sufficient to electrically identify a plurality of cells. be able to.
- the cell concentration in the cell suspension is desirably, for example, preferably 1 ⁇ 10 6 cells / ml to 1 ⁇ 10 7 cells / ml.
- the conditions of flow cytometry and cell sorting can be appropriately set according to the sorting method (eg, water drop charging method, cell capture method) in the flow cytometer to be used.
- the sorting method eg, water drop charging method, cell capture method
- the conditions may be, for example, the number of sort drops, the number of sort cells, and the flow rate suitable for obtaining target cells with high purity.
- examples of the labeling substance used for the labeled antibody include a fluorescent dye, which can be appropriately selected depending on the type of the laser light and the filter of the flow cytometer used.
- the fluorescent dye include fluorescein isothiocyanate (FITC), phycoerythrin (PE), arophycocynin (APC), texa red (TR), Cy3, Cy5, PerCO (registered trademark) (BD Bioscience Seeds), Red613 (registered trademark) (manufactured by Gibco), Red670 (registered trademark) (manufactured by Gibco), Alexa647 (manufactured by Molecular Sieves), Alexa488 (manufactured by Molecular Sieves), and the like.
- each of the antibodies may be labeled with a different labeling substance.
- the differentiation method of the present invention it is also possible to evaluate a factor that exerts a function in the process of dividing primate embryonic stem cells into vascular endothelial cells at an early stage of development. Therefore, according to the differentiation method of the present invention, the progress of the process of dividing the primate embryonic stem cell force into vascular endothelial cells in the early stage of development based on the dividing method is promoted or inhibited by the substance to be evaluated.
- the present invention can be applied to a screening method of screening for an inducer or inhibitor of differentiation into vascular endothelial cells at an early stage of development using the harm as an indicator. In addition, such a screening method can be applied to drug evaluation.
- step (I) may be performed by adding a substance to be evaluated to the medium used in step (I) of the screening method.
- the promotion or inhibition of the progress of the differentiation process can be determined by using, for example, the number of differentiated cells over a certain period of time, the morphology of the differentiated cells, the properties of the sorted cells (e.g., expression of a marker), etc., as indicators.
- the inducer is useful for, for example, developing a therapeutic condition for Z or a disease in which a therapeutic effect can be expected by improving the local blood flow.
- the inhibitor is useful for, for example, developing therapeutic means based on inhibiting angiogenesis in tumor growth, metastasis, and the like.
- primate embryonic stem cells can be differentiated into vascular endothelial cells in the early stage of development. Can be applied to the production of
- another aspect of the present invention relates to (I) a step of co-culturing primate embryonic stem cells with feeder cells and dividing them into vascular endothelial cell marker-positive cell group A; II) a step of substantially separating vascular endothelial cell marker-positive cells from the cell group A obtained in the above step (I)
- primate embryonic stem cells for example, human embryonic stem cells, which can be expanded indefinitely by self-renewal. Used. Therefore, according to the production method of the present invention, substantially uniformity is obtained. A large quantity of the early-stage vascular endothelial cells of a certain quality can be supplied. Further, according to the production method of the present invention, since primate embryonic stem cells, particularly human embryonic stem cells, are used, a therapeutic effect can be expected by improving the local blood flow, and Z and Can provide materials for the treatment of diseases and the like, and can efficiently produce a large amount of vascular building materials for clinical application in the field of regenerative medicine.
- steps (I) and ( ⁇ ) are the same as in the above-described differentiation method.
- ⁇ Step ( ⁇ ) ⁇ for amplifying the cells obtained in the above step ( ⁇ ) may be further performed.
- the step (III) by performing the step (III), the vascular endothelial cells in the early stage of development can be obtained in a larger amount.
- the cells obtained in the step ( ⁇ ) may be expanded, for example, by culturing the cells obtained in the step ( ⁇ ) in a culture vessel coated with an extracellular matrix.
- it can be carried out by culturing the cells on a medium containing an appropriate growth factor, serum or serum substitute, etc. under con- ditions suitable for inducing differentiation until confluent.
- Examples of the extracellular matrix include collagen IV and fibronectin.
- the coating of the culture vessel with the extracellular matrix or the like can be performed by a conventional method.
- growth factor examples include VEGF (vascular endothelial growth factor).
- a medium that can be used in said step ( ⁇ ) if the medium suitable for the amplification of a cell Yogu example, of 5 X 10- 5 M 2- mercaptoethanol and 10 wt% serum and growth factors And a medium containing ⁇ MEM or the like. Specifically, for example, (X MEM or the like containing 2-mercaptoethanol for 5 X 10- 5 M and a 10 wt% serum.
- the content of the growth factor in the medium can be appropriately set, and from the viewpoint of sufficiently exhibiting the cell growth effect, for example, in the case of VEGF, the content of VEGF in the medium is From the viewpoint of obtaining a sufficient proliferation effect of vascular endothelial cells in the early stage of development, the amount is preferably 10 ngZml or more, preferably 50 ngZml or more, and 100 ngZml or less.
- the concentration can be appropriately set within a vigorous range.
- the concentration of serum or serum substitute in the medium can be appropriately set, Preferably, it is 2% by weight or more, 20% by weight or less, preferably 10% by weight or less.
- the concentration can be appropriately set within a vigorous range.
- step (II) when the vascular endothelial cell marker-positive cells became confluent,
- a solution suitable for dissociating cells for example, a 0.25% by weight trypsin solution or the like is added.
- vascular endothelial cell marker-positive cells are seeded on a plate containing the same medium components as described above so as to be 1 ⁇ 10 4 cells / cm 2 to 1.5 ⁇ 10 4 cells Zcm 2 , Similarly, culture
- vascular endothelial cell marker-positive cells can be expanded. Such passage can be performed repeatedly as appropriate. Since the primate embryonic stem cells are used in the production method of the present invention, unlike the mouse embryonic stem cells, etc., unexpectedly, the desired vascular endothelial cell marker-positive cells are obtained by the above-described passage. Can be further amplified.
- Another aspect of the present invention includes:
- step (II) a step of substantially separating vascular endothelial cell marker-positive cells from the cell group A obtained in the step (I);
- vascular endothelial cells at an early stage of development can be expanded by the same steps as those of the above-described method of producing and producing.
- the expansion method of the present invention relates to a primate embryonic stem cell that can be amplified indefinitely by self-replication, for example, a human embryonic stem cell. Since the vesicles are used, a large amount of the embryonic vascular endothelial cells having substantially uniform quality can be supplied.
- Early-stage vascular endothelial cells obtained by the differentiation method, the production method, and the amplification method of the present invention have substantially uniform quality and can be supplied in large quantities. According to the method, the production method, and the amplification method, it is possible to stably supply a material for revascularization (for example, treatment of a damaged portion of a blood vessel).
- the early-stage vascular endothelial cells obtained by the present invention can regenerate blood vessels and the like and can be engrafted with high efficiency, and can be used in primates, specifically, humans and monkeys, particularly, If it shows particularly high compatibility with human organisms, it exhibits excellent properties.
- another aspect of the present invention relates to early-stage vascular endothelial cells obtained by differentiating primate embryonic stem cells into a vascular endothelial cell marker one positive cell group.
- the early-stage vascular endothelial cells of the present invention are produced from primate embryonic stem cells, they can be engrafted to living organisms with high efficiency and can be used for individuals with high compatibility.
- the early-stage vascular endothelial cells of the present invention have the ability to differentiate into vascular endothelial cells of primates, and exhibit high engraftment efficiency and high suitability to individuals. Therefore, according to the early-stage vascular endothelial cells of the present invention, vascular endothelial cells can be generated in an individual, and a condition in which a therapeutic effect can be expected by improving local blood flow, Z or a disease is treated. It becomes possible.
- the engraftment efficiency and suitability can be determined, for example, by injecting cells of a test subject into a skin ulcer site of a nude mouse and detecting the presence of a marker specific to the cells of the test subject at the skin ulcer site. Furthermore, by specifically staining the vascular endothelium via the blood flow of the individual, it can be evaluated by confirming that a functional blood vessel having the blood flow and traffic of the individual is constructed.
- the therapeutic effect by revascularization can be measured, for example, by injecting test subject cells into the skin ulcer site of a nude mouse, observing the skin ulcer site over time, and injecting the cells to increase the size of the skin ulcer site. It can be evaluated by observing the change in height.
- the early-stage vascular endothelial cells of the present invention are different from the antigen of the antibody used for sorting. Targeting early vascular endothelial cells based on immunological staining using an antibody against a vascular endothelial cell marker, etc., indicating that cadherin, CD34, PECAM1 and VEGF-R2 are all positive. Can be evaluated.
- the early-stage vascular endothelial cells of the present invention can be stably stored by, for example, cryopreservation in liquid nitrogen in the presence of 10% by weight of dimethyl sulfoxide and 90% by weight of serum.
- a therapeutic agent for vascular damage can be provided.
- Still another aspect of the present invention relates to a blood vessel containing an early stage vascular endothelial cell obtained by differentiating a primate embryonic stem cell into a vascular endothelial cell marker positive cell group as an active ingredient.
- the present invention relates to a therapeutic agent for injury.
- the therapeutic agent for vascular damage of the present invention is useful for treating ischemic diseases such as obstructive arteriosclerosis, ischemic heart disease (myocardial infarction, angina pectoris, heart failure, etc.), cerebrovascular disorder, skin ulcer, ischemic enteritis It can also be used for treatment of diseases such as renal sclerosis, regeneration of blood vessels at wound sites, and the like.
- ischemic diseases such as obstructive arteriosclerosis, ischemic heart disease (myocardial infarction, angina pectoris, heart failure, etc.), cerebrovascular disorder, skin ulcer, ischemic enteritis It can also be used for treatment of diseases such as renal sclerosis, regeneration of blood vessels at wound sites, and the like.
- examples of the "site requiring blood vessel regeneration” include a damaged blood vessel site. More specifically, the “site requiring regeneration of blood vessels” includes, for example, ischemic sites such as lower limb ischemia, myocardial ischemia, and cerebral ischemia, skin ulcer sites, and blood vessels in wound sites. Examples include cut or broken locations.
- the therapeutic agent for vascular damage of the present invention is a solution (for example, a pharmaceutically acceptable buffer or the like) suitable for maintaining early-stage vascular endothelial cells obtained by the present invention, or a pharmaceutically acceptable auxiliary.
- a substance capable of promoting angiogenesis or a sustained-release carrier containing the substance examples include bFGF, VEGF, HGF, and a substance exhibiting a function equivalent thereto.
- examples of the sustained-release carrier include gelatin particles, carriers exhibiting the same function as the gelatin particles, and the like.
- the content of vascular endothelial cells in the early stage of development in the therapeutic agent for vascular damage of the present invention depends on the maintenance of the survival and function of the early stage vascular endothelial cells and the transfer of the vascular endothelial cells from the early stage of development to other vascular endothelial cells. Any range may be used as long as it is in a range suitable for maintaining the dangling ability.
- the therapeutic agent for vascular damage of the present invention requires regeneration of blood vessels according to the disease to be applied, the severity of the disease, the age of the individual to be administered, the physical strength of the individual, the site of the disease, and the like. Department It can be administered directly or indirectly to the location.
- Specific examples of the method for administering the therapeutic agent for vascular damage of the present invention include local injection, intravascular administration, delivery via a catheter, and the like.
- a surgical operation or the like may be performed as necessary.
- the dose of the therapeutic agent for vascular damage of the present invention depends on the disease to be applied, the severity of the disease, the age of the individual to be administered, the physical strength of the individual, the site of the disease, and the like. "Effective amount”, that is, an amount suitable for engraftment at the target site and an amount that can sufficiently exert a blood vessel regeneration effect (for example, a therapeutic effect on blood vessel damage). Just fine.
- the effect of the therapeutic agent for vascular damage of the present invention can be determined by, for example, observing a site where blood vessel regeneration is required by angiography, immunostaining of vascular tissue of a tissue section, or the like, by the laser Doppler method.
- vascular regeneration can be performed.
- another aspect of the present invention relates to a method for regenerating vascular endothelial cells obtained by differentiating primate embryonic stem cells into a vascular endothelial cell marker one positive cell group, which requires vascular regeneration.
- the present invention relates to a method for regenerating a blood vessel, which is supplied to a site, for example, a site where a blood vessel is damaged.
- the method of regenerating blood vessels of the present invention can treat a damaged site of a blood vessel and reduce local blood flow. By improving the condition, it is possible to treat a condition, a Z, a disease, or the like where a therapeutic effect can be expected. Further, in the blood vessel regeneration method of the present invention, since the above-mentioned early-stage vascular endothelial cells are used, according to the blood vessel regeneration method of the present invention, a region requiring regeneration of a blood vessel is used. In addition, the blood vessels can be regenerated.
- the method of regenerating blood vessels of the present invention is carried out by being able to directly or indirectly administer the early-stage vascular endothelial cells to a target site, similarly to the method of administering the therapeutic agent for vascular damage of the present invention.
- Specific examples of the method of administering the early-stage vascular endothelial cells to a target site include local injection, intravascular administration, and delivery via a catheter.
- a surgical operation or the like may be performed as necessary.
- the dose of the early-stage vascular endothelial cells of the present invention can be set in the same manner as in the case of the above-mentioned therapeutic agent for vascular damage, and is an amount suitable for engraftment to a site to be applied. If it is an amount that can fully demonstrate the regenerating effect.
- the regenerative effect of the revascularization method of the present invention can be evaluated by the same method and index as in the evaluation of the effect of the therapeutic agent for vascular damage. Specifically, the regenerative effect is obtained by observing a target site by angiography, immunostaining of vascular tissue of a tissue section, or measuring blood flow by a laser Doppler method.
- vascular endothelial cells By the administration of vascular endothelial cells at the early stage of development, compared to before administration, regeneration of blood vessel structure, improvement of blood flow, improvement of function of target site, improvement of local blood pressure, normalization of skin temperature, An increase in the number of capillaries can be evaluated as an indicator that the blood vessels have been regenerated.
- a substance capable of promoting angiogenesis, a sustained-release carrier containing the substance, or the like may be further administered after administration of the vascular endothelial cells in the early stage of development.
- the early-stage vascular endothelial cells may be used in coexistence with mural cells or cells that are precursors to the generative lineage thereof.
- the present invention relates to a transplantation method, which comprises transplanting an early-stage vascular endothelial cell obtained by the production method of the present invention into a living body.
- the transplantation method of the present invention can be performed in the same manner as the revascularization method of the present invention.
- the transplantation method of the present invention since the early-stage vascular endothelial cells obtained by the production method of the present invention are used, according to the transplantation method of the present invention, a high engraftment efficiency to a living body and a high transplantation rate to an individual are achieved. Suitability can be obtained.
- the production method of the present invention Since the obtained early-stage vascular endothelial cells are used, according to the transplantation method of the present invention, blood vessels can be regenerated at the transplantation target site in an individual. Therefore, according to the transplantation method of the present invention, it is possible to treat diseases that can be expected to have a therapeutic effect by regenerating blood vessels, for example, the above-mentioned ischemic diseases and the like, and to recover blood vessels in wounds.
- step 2) performing a process suitable for transplanting the embryonic vascular endothelial cells obtained by the production method of the present invention to the site specified in the step 1) (transplant target site), and
- a drug or the like capable of promoting angiogenesis may be appropriately administered to the transplanted individual! / !.
- the identification of the "transplantation target site” in the step 1) includes, for example, angiography, X-ray irradiation [computed tomography, CT (computed tomography nos and yang), MRI (magnetic resonance imaging), and various diagnostic markers. Expression, vascular echo examination, scintigraphy, ABI measurement, percutaneous enzyme localization measurement, etc., can be used to identify the etiology and identify the disease site.
- transplant target site examples include the same site as the "site requiring blood vessel regeneration”.
- the “treatment suitable for transplanting early-stage vascular endothelial cells” in the step 2) includes the transplantation by a surgical operation for facilitating delivery of the early-stage vascular endothelial cells to the transplantation target site. Exposure of the target site, insertion of a catheter to facilitate delivery of the initial vascular endothelial cells to the transplant target site, and generation of a stable initial vascular endothelial cell to the transplant target site Initial vascular endothelial cell treatment and the like. [0129] In the above step 3), transplantation of vascular endothelial cells at an early stage of development can be performed by local injection, intravascular administration, delivery via a catheter, or the like.
- the amount of the initial vascular endothelial cells used at the time of transplantation in the step 3) can be set in the same manner as in the case of the above-mentioned therapeutic agent for vascular damage, and is an amount suitable for engraftment to the transplantation target site. Any amount can be used as long as it can sufficiently exert a blood vessel regeneration effect and the like.
- transplantation method of the present invention can be applied to primates, for example, humans and monkeys.
- the transplantation method of the present invention provides a method for treating ischemic diseases such as obstructive arteriosclerosis, ischemic heart disease (myocardial infarction, angina pectoris, heart failure, etc.), cerebrovascular disorder, skin ulcer, etc. It can be applied to treatment, regeneration of blood vessels at the wound site, and the like.
- ischemic diseases such as obstructive arteriosclerosis, ischemic heart disease (myocardial infarction, angina pectoris, heart failure, etc.), cerebrovascular disorder, skin ulcer, etc. It can be applied to treatment, regeneration of blood vessels at the wound site, and the like.
- Still another aspect of the present invention relates to a condition in which a therapeutic effect can be expected by improving local blood flow, and a method for producing a subject obtained by the production method of the present invention in a mammalian subject having Z or a disease.
- the present invention relates to a method for treating a condition or a Z or disease in which a therapeutic effect can be expected by improving local blood flow in a mammalian subject, which comprises administering a therapeutically effective amount of initial vascular endothelial cells.
- the treatment method of the present invention is effective for a condition and a Z or disease in which a therapeutic effect can be expected by improving local blood flow, for example, ulcer, ischemic disease and the like.
- the treatment method of the present invention can be implemented by using the therapeutic agent for vascular damage of the present invention, performing the transplantation method of the present invention, and the like.
- the early-stage vascular endothelial cells of the present invention can be used as a site in which a therapeutic effect can be expected by improving local blood flow, and a site requiring the regeneration of blood vessels in a mammalian subject having Z or disease.
- it can be used for the manufacture of a medicament for treating a mammalian subject by regenerating a blood vessel by supplying it to a site of vascular injury or the like.
- Another aspect of the present invention relates to a condition in which a therapeutic effect can be expected by improving local blood flow, and supply to a site requiring regeneration of a blood vessel of a mammalian subject having Z or disease.
- the early-stage vascular endothelial cells of the present invention have a higher supply property than progenitor cells of vascular endothelial cells. Excellent and shows higher engraftment.
- vascular structure containing mature vascular endothelial cells can be generated.
- Still another aspect of the present invention is characterized in that embryonic vascular endothelial cells obtained by differentiating primate embryonic stem cells are cultured in an environment suitable for angiogenesis, This is a method for constructing a blood vessel structure.
- step ( ⁇ ) As a method for constructing a vascular structure of the present invention, in addition to steps (I) and ( ⁇ ) in the method for producing an early-stage vascular endothelial cell and, if desired, step ( ⁇ ),
- the method of constructing a vascular structure of the present invention it is possible to stably provide a state in which a therapeutic effect can be expected by improving local blood flow and a material for treating Z or a disease. Becomes possible. Further, in the method for constructing a vascular structure of the present invention, the early-stage vascular endothelial cells obtained by differentiating primate embryonic stem cells (vascular endothelial cell marker-positive cells) are used. According to the method for constructing a structure, the above-mentioned condition and material for treating Z or a disease, which can engraft with high efficiency, construct a vascular structure, and obtain high suitability to an individual, can be obtained. Can be provided.
- collagen gel e.g., collagen IA gels, etc.
- the concentration of VEGF in the medium is the same as described above. Further, the concentration of phorbol 12-myristate 13-acetate in the medium is desirably 10 M to: LOO / zM, more preferably 100 M, from the viewpoint of obtaining an appropriate lumen structure.
- the “environment suitable for angiogenesis or vascular environment” may be defined as an environment in a living body, in which the embryonic vascular endothelial cells are maintained in or around blood vessels. And the like.
- a blood vessel structure can be constructed.
- step (ii) other vascular cells such as mural cells may coexist in addition to vascular endothelial cells at an early stage of development. .
- CMK-6 cell line ⁇ Hirofumi Suemori et al., Developmental Dynamics, 222, 273—279 (2001) ⁇ , which is a force-quiz monkey embryonic stem cell, was used.
- the monkey embryonic stem cells maintained on the containing dish were supplemented with a cell differentiation buffer ⁇ GIBCO (manufactured by GIBCO) ⁇ and incubated at 37 ° C for 10 minutes. Thereafter, the dish was tapped, and the embryonic stem cells were detached by pipetting in a single cell state by pipetting and collected.
- a cell differentiation buffer ⁇ GIBCO (manufactured by GIBCO) ⁇
- the OP9 cell line was cultured on a 10cm dish coated with a 0.1% by weight aqueous gelatin solution ⁇ derived from ⁇ shi skin, manufactured by SIGMA ⁇ until confluent, and the OP9 feeder layer was cultivated. Obtained.
- the collected embryonic stem cells 5 x 10 4 cells were seeded on the OP9 cell line. Later, differentiation culture ⁇ composition: 5 X 10- 5 M 2- mercaptoethanol and a MEM culture solution containing a 10 weight 0/0 serum (Gibco (GIBCO) Ltd.) ⁇ The 20ml was ⁇ Ka ⁇ Embryonic stem cells were co-cultured with OP9 cells for 8-10 days at 37 ° C., 5% by volume CO.
- the culture supernatant was removed from the obtained culture, and the dish was washed with phosphate buffered saline. Then, add 2 ml of Cell Dissociation Buffer to the washed dishes. And incubated at 37 ° C for 10 minutes. As a result, the OP9 cells remained in the structure on the sheet, and the embryonic stem cell-derived cells detached in a single cell state. Then, the solution on the dish obtained after the incubation is passed through a cell strainer (a filter having a diameter of 70 ⁇ m) ⁇ manufactured by BD Biosciences ⁇ , whereby the cells derived from embryonic stem cells are obtained. Only groups were collected.
- a cell strainer a filter having a diameter of 70 ⁇ m
- BSA serum albumin
- an anti-VE cadherin antibody ⁇ manufactured by BD Biosciences ⁇ was added, and incubated at room temperature for 20 minutes. Thereafter, the obtained product was washed twice with an HBSS solution containing 1% by weight of BSA. The washed product was subjected to flow cytometry analysis.
- flow cytometry analysis a trade name: FACS Vantage ⁇ manufactured by BD Biosciences ⁇ was used.
- VE-cadherin-positive cells were CD34-positive, PECAM1-positive, and VEGF-R2-positive, indicating that they were vascular endothelial cells.
- VE-cadherin-positive cells were separated from the embryonic stem cell-derived cell group by cell sorting using the anti-VE cadherin antibody and FACSVantage ⁇ manufactured by BD Biosciences ⁇ .
- HES-3 cell line established at Monash University, Australia ⁇ Benjamin E. Reubinof et al., Nature Biotechnology, 18, 399—404 (2000) ⁇ was used. .
- Human embryonic stem cells were treated with 0.1% by weight collagenase (manufactured by Wako Pure Chemical Industries, Ltd.) at 37 ° C for 10 minutes, and the undifferentiated human embryonic stem cells were subjected to tapping and pipetting. Collected as a small lump. Next, the obtained human embryonic stem cells were seeded on one layer of an OP9 feeder of a gelatin-coated dish in the same manner as in the case of the monkey embryonic stem cells of Example 1. Hi The embryonic stem cells were co-cultured with OP9 cells as small clumps.
- collagenase manufactured by Wako Pure Chemical Industries, Ltd.
- VE cadherin-positive cells appeared 8 to 10 days after the start of the co-culture.
- the VE-cadherin-positive cells were CD34-positive, VEGF-R2-positive and
- PECAM1 was positive. Therefore, it was suggested that the obtained cells were vascular endothelial cells.
- the VE-cadherin-positive cell group (5 ⁇ 10 4 cells) obtained in (2) of Example 1 was used for 6-Eldish ⁇ BD Biosciences ⁇ coated with collagen IV or fibronectin. They were seeded in each Ueru, trade name: the presence of human Recombinant VEGF ⁇ PeproTech (Peprotech) Co. ⁇ 50NgZml, culture ⁇ composition: 2-mercaptoethanol 5 X 10- 5 M and a 10 wt% serum 20 ml of an ⁇ MEM culture solution (manufactured by GIBCO) containing the same was added, and the cells were cultured at 37 ° C. and 5% by volume CO. In addition, the culture solution was
- the VE-cadherin-positive cells became confluent, the VE-cadherin-positive cells were detached from the dish with a 0.25% by weight trypsin solution ⁇ manufactured by GIBCO ⁇ .
- the obtained cells were diluted with the culture solution to a dilution ratio of 1: 2 to 1: 3, and the obtained cells were further coated with collagen IV or fibronectin in the same manner as described above. Seed each well of the dish ⁇ manufactured by BD Biosciences ⁇ and subculture using a new culture medium in the presence of 50 ngZml of trade name: human recombinant VEGF ⁇ manufactured by PEPROTECH ⁇ . Done.
- VE cadherin-positive cells could not be expanded in the same manner as in Example 2 because they died after the passage process.
- VE cadherin-positive cells (5 ⁇ 10 5 cells / 50 ⁇ phosphate buffered saline) obtained in Example 2 and subcultured and amplified in the same manner as in Example 2 were trade names: Vybrant CM—Dil cell -labeling solution Labeling was performed using ⁇ Molecular Probes ⁇ according to the Molecular Probes manual attached to the product.
- VE cadherin-positive cells were injected subcutaneously into one skin ulcer of the KSN nude mouse.
- the cells were transplanted by subcutaneously injecting only 50 ⁇ l of phosphate buffered saline ⁇ GIBCO ⁇ on the opposite side of the skin ulcer injected with VE-cadherin-positive cells. The healing process of the ulcer was observed.
- the KSN nude mouse was intraperitoneally injected with 10 1 16% Nembutal (registered trademark, manufactured by Dainippon Pharmaceutical Co., Ltd.) per 1 g of body weight. Dogs were anesthetized.
- Nembutal registered trademark, manufactured by Dainippon Pharmaceutical Co., Ltd.
- Pentobarbital (manufactured by Dainippon Pharmaceutical Co., Ltd.) SOmgZkg was intraperitoneally administered to an 8-week-old male KSN nude mouse (Japan SLC, Inc.), and the KSN nude mouse was anesthetized.
- VE cadherin-positive cells (1 ⁇ 10 6 cells) obtained in Example 2 were added to a trade name: Vybrant CM-Dil cell-labeling solution ⁇ manufactured by Molecular Probes ⁇ . And cell suspension was prepared with 100 ⁇ l of phosphate buffered saline in the same manner as described above.
- the cell suspension was injected into the right femoral artery of a KSN nude mouse, and immediately after that, the artery was ligated and excised.
- the obtained mouse was used as a lower limb ischemia model mouse.
- Pentobarbital 80 mg Zkg was intraperitoneally administered to the lower limb ischemia model mouse on day 7 after the cell group transplantation to anesthetize a KSN nude mouse (lower limb ischemia model mouse).
- the thoracic cavity of the anesthetized KSN nude mouse (lower limb ischemia model mouse) was dissected.
- a 23G injection needle (Terumo Corporation) was inserted into the left ventricle to release the right ventricle. Thereafter, subjected to 15 min perfusion with saline, further subjected to perfusion for 15 minutes at 4 weight 0/0 Bruno la phosphate-buffered saline solution of formaldehyde were fixed. Thereafter, the ischemic lower leg muscle was collected to obtain a tissue specimen.
- anesthetized KSN nude mouse (lower limb ischemia model mouse) was treated in the same manner as described above. After fixation, the ischemic lower leg muscle was collected. The solution components in the fixed tissue were replaced with a phosphate buffer containing 30% by weight of sucrose (PH 7.2). Thereafter, the tissue was embedded in a trade name: OCT compound (manufactured by Sakura Seiki Co., Ltd.), frozen, and a tissue section was prepared using a cryostat (manufactured by Rai Riki Co., Ltd.). As a control group, tissue sections were similarly prepared from KSN nude mice (lower limb ischemia model mice) injected with phosphate buffered saline without transplanting VE-cadherin-positive cells.
- OCT compound manufactured by Sakura Seiki Co., Ltd.
- the obtained tissue section was subjected to immunostaining using an anti-mouse PECAM1 antibody and an anti-human PECAM1 antibody.
- Fig. 7 shows the results.
- Fig. 7 panel (B) As a result, as shown in Fig. 7 panel (B), after transplantation of VE-cadherin-positive cells, On the day, anti-human PECAM1 antibody-positive cells were detected at the site of cell transplantation of the ischemic leg muscle. Therefore, it can be seen that human vascular endothelial cells derived from the transplanted VE-cadherin-positive cells are present.
- tissue sections were subjected to immunostaining using an anti-human PECAM1 antibody.
- Fig. 8 shows the results.
- the present invention it is possible to apply the present invention to the treatment of a condition or disease in which a therapeutic effect can be expected by improving local blood flow.
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JP2006514767A JPWO2005123904A1 (ja) | 2004-06-22 | 2005-06-15 | 霊長類動物胚性幹細胞からの血管内皮細胞の製造方法 |
US11/630,208 US20080025955A1 (en) | 2004-06-22 | 2005-06-15 | Method Of Producing Vascular Endothelial Cells From Primate Embryonic Stem Cells |
EP05751180A EP1783207A4 (en) | 2004-06-22 | 2005-06-15 | PRODUCTION PROCESS FOR VASCULAR ENDOTHELIAL CELLS FROM EMBRYONIC STEM CELLS |
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US20110236971A2 (en) | 2007-09-25 | 2011-09-29 | Maksym Vodyanyk | Generation of Clonal Mesenchymal Progenitors and Mesenchymal Stem Cell Lines Under Serum-Free Conditions |
KR101109125B1 (ko) | 2009-03-24 | 2012-02-15 | 한국과학기술연구원 | 줄기세포를 혈관세포로 분화시키는 방법 및 이를 이용한 생체 내 혈관신생 유도 |
WO2010110596A2 (en) * | 2009-03-24 | 2010-09-30 | Korea Institute Of Science And Technology | Method for differentiation of stem cells into vascular cells and the induction of angiogenesis using the same |
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US20120064040A1 (en) * | 2010-06-03 | 2012-03-15 | The Regents Of The University Of California | Serum free culture medium and supplement |
US20150349831A1 (en) * | 2014-06-02 | 2015-12-03 | Two Technologies, Inc. | Protective case for an electronic device |
WO2015186981A1 (en) * | 2014-06-05 | 2015-12-10 | Samsung Electronics Co., Ltd. | Wearable device, main unit of wearable device, fixing unit of wearable device, and control method of wearable device |
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- 2005-06-15 US US11/630,208 patent/US20080025955A1/en not_active Abandoned
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Also Published As
Publication number | Publication date |
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EP1783207A1 (en) | 2007-05-09 |
JPWO2005123904A1 (ja) | 2008-04-10 |
EP1783207A4 (en) | 2008-07-30 |
US20080025955A1 (en) | 2008-01-31 |
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