WO2016031824A1 - 人工腹膜組織及びその製造方法 - Google Patents
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Definitions
- the present disclosure relates to an artificial peritoneal tissue and a method for manufacturing the same.
- the peritoneum is a continuous biological membrane that covers a part of the pelvic organ from the abdominal wall and all the abdominal organs, and is formed of a single mesothelial cell layer and a connective tissue containing the vascular network, lymphatic network, etc.
- the peritoneum has long been known to be closely involved in cancer metastasis. Many cancers of pelvic organs such as the gastrointestinal tract and ovaries are known to release into the abdominal cavity, adhere to and infiltrate the peritoneum (peritoneal dissemination), and cause further metastasis via blood vessels and lymphatic vessels. ing.
- peritoneal dialysis using the peritoneum is performed as one of the dialysis treatments. It has been reported that long-term peritoneal dialysis causes deterioration of peritoneal function and hardening / thickening of the peritoneum, and ultimately causes encapsulated peritoneal sclerosis (EPS).
- EPS encapsulated peritoneal sclerosis
- the inventors of the present invention have made extensive studies and are covering the surface of a cell tissue containing fibroblasts, an extracellular matrix, and at least one of vascular endothelial cells and lymphatic endothelial cells forming a lumen, and the surface of the cell tissues.
- An artificial peritoneal tissue with a skin cell layer was successfully completed.
- an artificial peritoneal tissue capable of reproducing an environment closer to that of a human living body and a method for producing the same are provided.
- FIG. 1 is an example of an image of the artificial peritoneal tissue of Example 1.
- FIG. 1A is an optical microscope image
- FIGS. 1B to 1F are transmission electron microscope images.
- FIG. 2 is an example of an image of the artificial peritoneal tissue of Example 2.
- FIG. 2A is an optical microscope image
- FIGS. 2B to 2D are transmission electron microscope images.
- the present disclosure provides a cellular tissue comprising fibroblasts, an extracellular matrix, and at least one of vascular endothelial cells and lymphatic endothelial cells forming a lumen, and a mesothelium covering the surface of the cellular tissue
- the present invention relates to an artificial peritoneal tissue including a cell layer.
- the present disclosure provides a cellular tissue comprising fibroblasts, an extracellular matrix, and at least one of vascular endothelial cells and lymphatic endothelial cells forming a lumen, and a mesothelium covering the surface of the cellular tissue
- a method for producing an artificial peritoneal tissue comprising a cell layer, comprising culturing at least one of vascular endothelial cells and lymphatic endothelial cells, fibroblasts, and an extracellular matrix to form the cellular tissue, and the cells
- the present invention relates to a method for producing an artificial peritoneal tissue including disposing mesothelial cells on a tissue.
- the “artificial peritoneal tissue” refers to a cell population that can function as a tissue called peritoneum, and can be a functional or structural model of the peritoneum.
- the artificial peritoneal tissue in the present disclosure may include, for example, a model imitating the structure of a peritoneum in a living body, a model that can reproduce the function of a peritoneum in a living body, a model for reproducing, or the like.
- the present disclosure provides a cellular tissue comprising fibroblasts, an extracellular matrix, and at least one of vascular endothelial cells and lymphatic endothelial cells forming a lumen, and a mesothelium covering the surface of the cellular tissue
- the present invention relates to an artificial peritoneal tissue having a cell layer (hereinafter also referred to as “artificial peritoneal tissue of the present disclosure”).
- the artificial peritoneal tissue of the present disclosure has a cell tissue and a mesothelial cell.
- the mesothelial cell layer forms a covered structure, and the mesothelial cell layer is composed of at least one of a fibroblast, a capillary-like structure, and a lymphatic-like structure. It has a structure connected to tissue through an extracellular matrix. That is, in one embodiment, the artificial peritoneal tissue of the present disclosure includes an extracellular matrix between fibroblasts and mesothelial cells.
- the structure, preferably the function, of the peritoneal tissue closer to the peritoneal tissue of a living body can be reproduced.
- the cellular tissue is an aggregate of cells including fibroblasts, extracellular matrix, and / or vascular endothelial cells and lymphatic endothelial cells, wherein the vascular endothelial cells and lymphatic endothelial cells A lumen containing at least one of the cells.
- the cell tissue has a structure in which a cell layer composed of fibroblasts and stroma sandwiches a vascular network composed of at least one of vascular endothelial cells and lymphatic endothelial cells in a sandwich shape.
- lumen refers to a hollow tubular structure formed by cells containing at least one of vascular endothelial cells and lymphatic endothelial cells.
- the cells constituting the lumen wall include either vascular endothelial cells or lymphatic endothelial cells. In one embodiment, it is preferable that the cells constituting the wall surface of the lumen are substantially formed by either vascular endothelial cells or lymphatic endothelial cells.
- the structure of the lumen include a capillary vessel-like structure and a lymph vessel-like structure.
- the lumens form a vascular network within the cellular tissue.
- the lumen may be a structure formed in a mesh network, such as a capillary network or a lymphatic network.
- the lumen formed by the vascular endothelial cells is formed to have a structure closer to the capillaries of the living body. From this point, in one embodiment, it is preferable that adjacent vascular endothelial cells form an intercellular adhesion.
- the inner wall of the lumen is formed so as to have a structure closer to the capillaries of the living body. In this respect, in another embodiment, the inner wall of the lumen is preferably a structure rich in vesicle-like structures.
- the diameter of the lumen formed by the vascular endothelial cells is, for example, 5 ⁇ m to 28 ⁇ m, but is not limited thereto.
- the medium components reach cells inside the cell tissue more easily and the tissue structure can be easily maintained.
- the diameter of the lumen can be measured by a conventionally known method such as immunostained images of vascular endothelial cells.
- the lumen formed by the lymphatic endothelial cells is formed so as to have a structure closer to the capillary lymphatic vessel of the living body. From this point, in one embodiment, it is preferable to include a portion where adjacent lymphatic endothelial cells form intercellular adhesion and a portion where adjacent lymphatic endothelial cells are separated from each other.
- fibroblasts in a cellular tissue are arranged via an extracellular matrix to form a three-dimensional structure.
- the concentration of fibroblasts contained in the cell tissue is, for example, 4 ⁇ 10 8 cells / cm 3 to 1.2 ⁇ 10 9 cells / cm 3 because it optimizes the microenvironment for tube formation. Yes, preferably 1.0 ⁇ 10 9 cells / cm 3 to 1.2 ⁇ 10 9 cells / cm 3 .
- the above-described fibroblasts, endothelial cells and lymphatic endothelial cells may be cells derived from humans or cells derived from animals other than humans. In other embodiments, these cells may be cells derived from mesenchymal stem cells, embryonic stem cells, induced pluripotent stem cells, or the like. In another embodiment, the cell may be a cultured cell. Examples of cultured cells include, but are not limited to, primary cultured cells, subcultured cells, and cell line cells.
- the cell tissue may include cells other than those described above.
- cells other than those described above include, but are not limited to, pericytes and smooth muscle cells. These cells may be human-derived cells or non-human animal-derived cells.
- the cells may be cells derived from mesenchymal stem cells, embryonic stem cells, induced pluripotent stem cells, or the like.
- the cell may be a cultured cell. Examples of cultured cells include, but are not limited to, primary cultured cells, subcultured cells, and cell line cells.
- the extracellular matrix may include a substance that can play the above role in in vitro cell culture, an artificially synthesized substance, or a part thereof.
- Specific examples of the extracellular matrix include fibronectin, gelatin, collagen, collagen peptide, laminin and polylysine.
- the extracellular matrix is not limited to these examples, and examples thereof include those disclosed in JP2007-228921A (Patent No. 4919464) and JP2012-115254A.
- the extracellular matrix contained in the cellular tissue may be one type or two or more types.
- the combination of the extracellular matrix contained in the cell tissue includes a combination of the first substance and the second substance that interacts with the first substance.
- the combination of the first substance and the second substance has a combination of a polymer having an RGD sequence and a polymer that interacts with a polymer having an RGD sequence, or a polymer having a positive charge and a negative charge. Examples include a combination of polymers.
- the combination of the first substance and the second substance include fibronectin and gelatin (or collagen peptide), fibronectin and ⁇ -polylysine, fibronectin and hyaluronic acid, fibronectin and dextran sulfate, fibronectin and heparin, laminin and gelatin, etc. Is mentioned.
- the mesothelial cell layer is formed so as to cover the cell tissue surface.
- the mesothelial cell layer is located on the top surface of the cellular tissue.
- the mesothelial cells are cells that form the outermost layer (capped cells).
- the mesothelial cell layer is formed of substantially one layer of mesothelial cells.
- the density of mesothelial cells in the mesothelial cell layer is 5.2 ⁇ 10 2 cells / mm 2 to 2.5 ⁇ 10 3 cells / mm 2 .
- 5.2 ⁇ 10 2 cells / mm 2 to 1.3 ⁇ 10 3 cells / mm 2 are preferable.
- adjacent mesothelial cells preferably form an intercellular adhesion.
- the mesothelial cell layer has one or more microvilli on its surface.
- the mesothelial cells described above may be human-derived cells or cells derived from animals other than humans.
- the mesothelial cells may be cells derived from mesenchymal stem cells, embryonic stem cells, induced pluripotent stem cells, or the like.
- the mesothelial cell may be a cultured cell. Examples of cultured cells include, but are not limited to, primary cultured cells, subcultured cells, and cell line cells.
- the artificial peritoneal tissue of the present disclosure can be used for drug evaluation such as a medicinal effect test, a pharmacological test, and a safety test on the peritoneum of a test substance.
- the artificial peritoneal tissue of the present disclosure can be used for applications for screening candidate substances as active ingredients.
- the artificial peritoneal tissue of the present disclosure can be used for basic research and evaluation of peritoneum in a living body.
- the artificial peritoneal tissue of the present disclosure can be used as an experimental tool for studying and evaluating functions inherent in the peritoneum, such as absorption and transport of body fluids and immune cells.
- the artificial peritoneal tissue of the present disclosure can be used for applications for evaluating the behavior of cancer cells in the peritoneal tissue.
- the artificial peritoneal tissue of the present disclosure can be used for screening candidate substances that are active ingredients of drugs used for the treatment of peritoneum such as anticancer agents.
- the artificial peritoneal tissue of the present disclosure can be used as an experimental tool to reproduce cancer invasion, cancer metastasis associated with peritoneal dissemination, or to elucidate the mechanism.
- the artificial peritoneal tissue of the present disclosure is used as an experimental tool to elucidate the mechanism of peritoneal function deterioration associated with peritoneal dialysis, peritoneal sclerosis or thickening, encapsulating peritoneal sclerosis (EPS). Can be used.
- the artificial peritoneum of the present disclosure can be used as a graft for transplantation medicine.
- the present disclosure provides a cellular tissue comprising fibroblasts, an extracellular matrix, and at least one of vascular endothelial cells and lymphatic endothelial cells forming a lumen, and a mesothelium covering the surface of the cellular tissue
- the present invention relates to a method for producing an artificial peritoneal tissue including a cell layer (hereinafter also referred to as “the method for producing an artificial peritoneal tissue of the present disclosure”).
- the method for producing an artificial peritoneal tissue of the present disclosure includes forming the cellular tissue by culturing at least one of a vascular endothelial cell and a lymphatic endothelial cell, a fibroblast, and an extracellular matrix, and on the cellular tissue. Including placing mesothelial cells.
- a lumen blood vessel-like structure in which adjacent vascular endothelial cells form an intercellular adhesion and a vesicle-like structure is formed on the inner wall.
- a lumen (lymphatic tube-like structure) having a portion where adjacent lymphatic endothelial cells form intercellular adhesion and a separated portion. ) Can be produced. Therefore, according to the method for manufacturing an artificial peritoneal tissue of the present disclosure, in one embodiment, an artificial peritoneal tissue capable of reproducing an environment closer to that of a human living body can be manufactured.
- an artificial peritoneal tissue with high tissue reproducibility can be manufactured.
- the artificial peritoneal tissue of the present disclosure can be produced.
- Formation of cellular tissue includes culturing at least one of vascular endothelial cells and lymphatic endothelial cells, fibroblasts, and extracellular matrix.
- the formation of cellular tissue can be performed by sandwiching one cell layer containing vascular endothelial cells and / or lymphatic endothelial cells between cell layers of fibroblasts and culturing in that state. (Sandwich type).
- the cell tissue can be formed by placing and culturing a mixture of fibroblasts and at least one of vascular endothelial cells and lymphatic endothelial cells on a substrate ( Mixture type).
- the formation of cellular tissue may be performed by combining a sandwich type and a mixture type.
- the culture of at least one of vascular endothelial cells and lymphatic endothelial cells, fibroblasts, and extracellular matrix is performed by arranging these cells coated with a coating containing the extracellular matrix in a three-dimensional arrangement. Can be done. Alternatively, such culturing may be performed by alternately laminating (LbL) these cells (one layer) and the extracellular matrix.
- LbL laminating
- the formation of cellular tissue may be a combination of cells coated with a coating comprising an extracellular matrix and cells not coated.
- formation of a cellular tissue using coated cells can be produced based on the methods disclosed in Examples and Japanese Patent Application Laid-Open No. 2012-115254.
- the formation of a cell tissue by LbL can be prepared based on the method disclosed in JP 2007-228921 A (Patent No. 4919464).
- the fibroblasts are stacked such that the cell layer of fibroblasts is preferably 4 layers or more, more preferably 5 layers, 6 layers, 7 layers, 8 layers, 9 layers or 10 layers or more. Be placed.
- the fibroblast placement (seeding) density optimizes the microenvironment for lumen formation and monolayer mesothelial cell layer formation, 4 ⁇ 10 8 cells / cm 3. -1.2 ⁇ 10 9 cells / cm 3 are preferable, and 1 ⁇ 10 9 cells / cm 3 to 1.2 ⁇ 10 9 cells / cm 3 are more preferable.
- the formation of a mesothelial cell layer includes placing and culturing mesothelial cells on a cellular tissue.
- mesothelial cells are placed over the cell tissue surface.
- the mesothelial cells are arranged such that substantially one layer of mesothelial cells is formed.
- the density of mesothelial cells is 5.2 ⁇ 10 2 cells / mm 2 to 2.5 ⁇ 10 3 cells / mm 2 . In other embodiments, such density is between 5.2 ⁇ 10 2 cells / mm 2 and 1.3 ⁇ 10 3 cells / mm 2 in terms of optimal conditions for forming a uniform mesothelial cell layer. Preferably there is.
- the mesothelial cells are preferably seeded without covering the surface with an extracellular matrix from the viewpoint of forming a uniform mesothelial cell layer.
- the mesothelial cell is a cellular tissue because the mesothelial cell forms an integral structure with the cellular tissue via the extracellular matrix, and an artificial peritoneal tissue closer to the living peritoneal tissue is obtained. It is preferable to seed on the cell tissue 6 to 24 hours after the cell seeding (for example, seeding of fibroblasts located in the uppermost layer of the cell tissue).
- the culture is preferably performed for 5 days or more after mesothelial cell seeding from the viewpoint that an adhesion structure is formed between adjacent mesothelial cells and an artificial peritoneal tissue closer to the peritoneal tissue of a living body is obtained.
- the present disclosure relates to an artificial peritoneal tissue comprising co-culturing the artificial peritoneal tissue of the present disclosure and cancer cells, and observing the behavior of cancer cells in the co-cultured artificial peritoneal tissue.
- the present invention relates to a method for evaluating behavior of cancer cells (hereinafter, also referred to as “evaluation method of the present disclosure”).
- Evaluation of cancer cell behavior includes evaluating or observing the ability of cancer cells to proliferate, infiltrate, metastasize and influence other cells in artificial peritoneal tissue, and the state of their suppression, It is not limited to these.
- the evaluation method in the present disclosure also includes observing culture conditions in reproduction of cancer growth, invasion and / or metastasis using the artificial peritoneal tissue of the present disclosure and / or the presence or absence of variation in reproduction due to external changes. May be included.
- co-culture of artificial peritoneal tissue and cancer cells can be performed by placing cancer cells in the artificial peritoneal tissue and culturing them.
- the above-mentioned medium can be used.
- the culture temperature is as described above.
- the evaluation method of the present disclosure may include bringing a test substance into contact with an artificial peritoneal tissue co-cultured with cancer cells.
- the artificial peritoneal tissue of the present disclosure may be able to reproduce cancer growth, invasion and / or metastasis by co-culturing with cancer cells. Therefore, in one embodiment, the present disclosure relates to a cancer infiltration model in a peritoneal tissue including the artificial peritoneal tissue of the present disclosure and a cancer cell.
- the present disclosure includes co-culturing the artificial peritoneal tissue of the present disclosure and a cancer cell, contacting the artificial peritoneal tissue in contact with the cancer cell and a test substance, and contacting the cancer cell.
- the present invention relates to a screening method for a candidate substance as an active ingredient of an anticancer agent (hereinafter, also referred to as “screening method of the present disclosure”), which comprises evaluating the action of the test substance on the artificial peritoneal tissue.
- screening method of the present disclosure in one embodiment, since the artificial peritoneal tissue of the present disclosure is used, the test substance can be evaluated in an environment close to a living body as compared with the conventional method. Can be played.
- the action of the test substance includes an action of suppressing at least one selected from the group consisting of metastasis, invasion, and proliferation of the test substance to cancer cells.
- the present disclosure provides a kit for screening a candidate substance that is an active ingredient of an anticancer agent, including the artificial peritoneal tissue of the present disclosure and cancer cells (hereinafter, “the screening kit of the present disclosure”). Also called). According to the screening kit of the present disclosure, in one embodiment, the screening method of the present disclosure can be performed.
- the screening kit of the present disclosure may further include a product including at least one of a reagent, a material, a tool, and a device used for a predetermined test, and an instruction (instruction manual). Good.
- coated fibroblasts are prepared.
- coated fibroblasts can be formed by alternately stacking fibronectin and gelatin.
- the coated fibroblasts are seeded on a substrate such as a cell culture insert and cultured.
- the seeding of the coated fibroblasts is performed so that the coated fibroblasts are laminated in 4 layers or more, preferably 5 layers, 6 layers, 7 layers, 8 layers, 9 layers or 10 layers or more.
- the density of fibroblasts at seeding is 1 ⁇ 10 2 to 1 ⁇ 10 9 cells / cm 3 , 1 ⁇ 10 4 to 1 ⁇ 10 8 cells / cm 3, or 1 ⁇ 10 5 to 1 ⁇ 10 7 cells / cm 3 .
- the culture is performed by adding a medium.
- the medium include, but are not limited to, Eagle's MEM medium, Dulbecco's Modified Eagle medium (DMEM), Modified Eagle medium (MEM), Medium Essential medium, RDMI, and GlutaMax medium.
- DMEM Dulbecco's Modified Eagle medium
- MEM Modified Eagle medium
- MEM Medium Essential medium
- RDMI RMI
- GlutaMax medium GlutaMax medium.
- a person skilled in the art can appropriately select a medium according to the type of cells to be cultured.
- a medium supplemented with serum is used as the medium.
- the culture temperature is 37 ° C., for example.
- the culture time is, for example, 6 to 24 hours.
- a person skilled in the art can appropriately set the culture temperature and the culture time according to the type of cells to be cultured.
- vascular endothelial cells are seeded on the formed fibroblast laminate and cultured.
- Vascular endothelial cells are arranged so that one layer of vascular endothelial cells is formed.
- those coated with an extracellular matrix may be used, or those not coated may be used.
- the culture conditions are as described above.
- coated fibroblasts are seeded on the vascular endothelial cells and cultured.
- the seeding and culture of the coated fibroblasts are performed in the same manner as described above.
- mesothelial cells are seeded on the cell tissue and cultured.
- mesothelial cells cells that are not coated with the extracellular matrix are used from the viewpoint of efficiently forming one mesothelial cell layer.
- the seeding density of mesothelial cells is as described above.
- the culture medium and culture temperature are as described above for the cell tissue.
- the culture time varies depending on the culture temperature, but is, for example, 5 days or longer. In one embodiment, the culture time is preferably 5-14 days.
- vascular endothelial cell layer one layer
- fibroblast cell layers four or more layers
- the cell tissue may be formed by mixing, seeding and culturing vascular endothelial cells and coated fibroblasts.
- a cell tissue may be produced using pericytes, smooth muscle cells, and mesenchymal stem cells instead of or in combination with fibroblasts.
- cell tissue may be produced using lymphatic endothelial cells instead of or in combination with vascular endothelial cells.
- An artificial comprising a fibroblast, an extracellular matrix, a cell tissue containing at least one of a vascular endothelial cell and a lymphatic endothelial cell forming a lumen, and a mesothelial cell layer covering the surface of the cell tissue Peritoneal tissue.
- the mesothelial cell layer forms a covered structure, and the mesothelial cell binds to a tissue composed of at least one of a fibroblast and a capillary-like structure and a lymphatic-like structure via an extracellular matrix.
- [5] The artificial peritoneal tissue according to any one of [1] to [4], wherein the extracellular matrix includes at least fibronectin and gelatin.
- the extracellular matrix includes a first substance and a second substance
- a combination of the first substance and the second substance is selected from the group consisting of: Artificial peritoneal tissue according to crab: (A) fibronectin and gelatin; (B) fibronectin and ⁇ -polylysine; (C) fibronectin and hyaluronic acid; (D) fibronectin and dextran sulfate; (E) fibronectin and heparin; and (f) laminin and gelatin.
- the artificial peritoneal tissue according to [6] wherein the combination of the first substance and the second substance is fibronectin and gelatin.
- An artificial peritoneum comprising a fibroblast, an extracellular matrix, a cell tissue containing at least one of vascular endothelial cells and lymphatic endothelial cells forming a lumen, and a mesothelial cell layer covering the surface of the cell tissue
- a method for producing a tissue comprising culturing at least one of a vascular endothelial cell and a lymphatic endothelial cell, a fibroblast, and an extracellular matrix to form the cellular tissue, and a mesothelial cell on the cellular tissue.
- a method for producing an artificial peritoneal tissue comprising arranging.
- the method for producing an artificial peritoneal tissue according to [8], wherein the formation of the cellular tissue includes arranging fibroblasts coated with an extracellular matrix.
- 50 mM Tris-HCl 50 mM Tris adjusted to pH 7.4 with HCl (manufactured by Nacalai Tesque) sterilized by wet heat in an autoclave (121 ° C., 20 minutes)
- BFN Fibronectin from plasma plasma (Sigma- (Aldrich) FN solution: 0.04 mg BFN / 1 ml 50 mM Tris-HCl (pH 7.4)
- G solution 0.04 mg Gelatin / 1 ml 50 mM Tris-HCl (pH 7.4)
- Coated cells were prepared based on the description in JP2012-115254A.
- NHDF normal human skin fibroblasts
- FN extracellular matrix components used fibronectin
- G gelatin
- the cells were immersed in the FN solution and the G solution alternately for a total of 9 times to prepare a coated NHDF having a (FN / G) 4 FN film formed on the surface (the thickness of the coating: about 10 nm).
- the FN solution was immersed 5 times and the G solution was immersed 4 times.
- the thickness of the film was measured by the method described in the examples of JP2012-115254A.
- ⁇ Human umbilical vein intravascular cells (HUVEC)> A coated HUVEC with a (FN / G) 4 FN film was prepared in the same manner as above except that HUVEC was used instead of NHDF (thickness of the coating: about 10 nm).
- ⁇ Human skin lymphatic endothelial cells (HDLEC)> A coated HDLEC with a (FN / G) 4 FN film formed in the same manner as above except that HDLEC was used instead of NHDF (thickness of the coating: about 10 nm).
- Example 1 [Production of artificial peritoneal tissue with vascular network structure]
- an insert equipped with a perforated polyester membrane (pore diameter: 0.4 ⁇ m) and a 24-well multiplate were prepared.
- the coated NHDF was seeded at 4 ⁇ 10 5 cells / well and cultured for 6 hours to prepare an NHDF layer (four layers).
- the coated HUVEC was seeded on the NHDF layer at 1 ⁇ 10 5 cells / well and cultured for 6 hours (HUVEC layer: 1 layer).
- the coated NHDF was seeded at 4 ⁇ 10 5 cells / well on the HUVEC layer and cultured for 6 hours to prepare an NHDF layer (four layers) on the HUVEC layer.
- 5 ⁇ 10 4 cells / well (1.3 ⁇ 10 3 cells / mm 2 ) of human omentum-derived mesothelial cells were seeded and cultured for 5 days to produce artificial peritoneal tissue.
- the obtained artificial peritoneal tissue is shown in FIG.
- the medium used was DMEM containing 10% FBS, and the culture was performed at 5% CO 2 and 37 ° C.
- the obtained artificial peritoneal tissue had a thickness of 45 ⁇ m.
- the thickness of the cell tissue was 42 ⁇ m
- the diameter of the capillary-like structure was 18 ⁇ m
- the thickness of the mesothelial cell layer was 3 ⁇ m.
- FIG. 1A is an optical microscope image
- FIGS. 1B to F are transmission electron microscope images.
- 1A to F BV represents a capillary-like structure
- MC represents a mesothelial cell
- Fb represents a fibroblast
- ECM represents an extracellular matrix.
- the arrows in FIG. 1A indicate the sheet structure of mesothelial cells. As shown in FIGS.
- the obtained artificial peritoneal tissue has a lumen formed by vascular endothelial cells and a connective tissue layer containing fibroblasts and an extracellular matrix, and the surface of the connective tissue layer is It was confirmed that the structure was covered with a single layer of mesothelial cells, indicating a structure similar to the peritoneum of a living body. As shown by the arrow in FIG. 1C, an adhesion structure could be confirmed between adjacent mesothelial cells. Moreover, as shown in FIG. 1D, microvilli were confirmed on the surface of the mesothelial cell layer. As shown in FIG.
- FIG. 1F is an enlarged view of a part of a vascular endothelial cell forming a lumen. As shown in FIG. 1F, it was confirmed that the inner wall of the lumen was rich in vesicle-like structures (arrowheads in the figure) distributed in a large amount in the capillary wall of the living body.
- Example 2 [Production of artificial peritoneal tissue with lymphatic network structure] An artificial peritoneal tissue was prepared in the same manner as in Example 1 except that the coated HDLEC was used instead of the coated HUVEC. The obtained artificial peritoneal tissue is shown in FIG. The resulting artificial peritoneal tissue had a thickness of 44 ⁇ m. The thickness of the cell tissue was 41 ⁇ m, the diameter of the lymphatic tube-like structure was 13 ⁇ m, and the thickness of the mesothelial cell layer was 3 ⁇ m.
- FIG. 2A is an optical microscope image, and B to D are transmission electron microscope images. 2A to 2D, L represents a lymphatic structure, Fb represents a fibroblast, and ECM represents an extracellular matrix.
- the arrows in FIG. 2A indicate the sheet structure of mesothelial cells.
- the obtained artificial peritoneal tissue has a lumen formed by lymphatic endothelial cells and a connective tissue layer containing fibroblasts and an extracellular matrix.
- the surface of the connective tissue layer is one layer. It was confirmed that the structure was covered with mesothelial cells.
- the lumen formed by lymphatic endothelial cells has a portion where lymphatic endothelial cells adhere (arrows in FIG. 2B) and a portion where lymphatic endothelial cells dissociate (FIG. 2B). 2D arrow) was confirmed, and it was confirmed that the structure was close to the capillaries of the living body.
- artificial peritoneal tissue with vascular network structure and artificial peritoneal tissue with lymphatic network structure can be prepared using mesothelial cell lines that can be subcultured for a long time instead of human omental mesothelial cells We were able to.
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Abstract
Description
一つの実施態様において、本開示は、線維芽細胞、細胞外マトリックス、並びに管腔を形成する血管内皮細胞及びリンパ管内皮細胞の少なくとも一方を含む細胞組織と、前記細胞組織の表面を覆う中皮細胞層とを備える人工腹膜組織(以下、「本開示の人工腹膜組織」ともいう)に関する。
一つの実施形態において、細胞組織は、線維芽細胞と、細胞外マトリックスと、血管内皮細胞及びリンパ管内皮細胞の少なくとも一方とを含む細胞の集合体であって、血管内皮細胞及びリンパ管内皮細胞の少なくとも一方の細胞を含む管腔を有している。他の実施形態において、細胞組織は、線維芽細胞と間質からなる細胞層が血管内皮細胞及びリンパ管内皮細胞の少なくとも一方による脈管ネットワークをサンドイッチ状に挟んだ構造を成す。
中皮細胞層は、細胞組織表面を覆うように形成されている。一つの実施形態において、中皮細胞層は、細胞組織の上面に位置している。他の実施形態において、中皮細胞は、最表層を形成する細胞(被蓋細胞)となる。別の実施形態において、中皮細胞層は、実質的に一層の中皮細胞の層で形成されている。
他の実施態様において、本開示は、線維芽細胞、細胞外マトリックス、並びに管腔を形成する血管内皮細胞及びリンパ管内皮細胞の少なくとも一方を含む細胞組織と、前記細胞組織の表面を覆う中皮細胞層とを備える人工腹膜組織の製造方法(以下、「本開示の人工腹膜組織の製造方法」ともいう)に関する。本開示の人工腹膜組織の製造方法は、血管内皮細胞及びリンパ管内皮細胞の少なくとも一方と線維芽細胞と細胞外マトリックスとを培養することによって前記細胞組織を形成すること、及び前記細胞組織上に中皮細胞を配置することを含む。
細胞組織の形成は、血管内皮細胞及びリンパ管内皮細胞の少なくとも一方と線維芽細胞と細胞外マトリックスとを培養することを含む。一つの実施形態において、細胞組織の形成は、血管内皮細胞及び/又はリンパ管内皮細胞を含む1層の細胞層を線維芽細胞の細胞層で挟み、その状態で培養することにより行うことができる(サンドイッチ型)。また、他の実施形態において、細胞組織の形成は、線維芽細胞と、血管内皮細胞及びリンパ管内皮細胞の少なくとも一方との混合物を基材上に配置して培養することにより行うことができる(ミクスチャー型)。別の実施形態において、細胞組織の形成は、サンドイッチ型とミクスチャー型を組み合わせて行ってもよい。
一つの実施形態において、中皮細胞層の形成は、細胞組織上に中皮細胞を配置して培養することを含む。他の実施形態において、中皮細胞は、細胞組織表面を覆うように配置される。また、別の実施形態において、中皮細胞は、中皮細胞の層が実質的に一層形成されるように配置される。
別の実施態様において、本開示は、本開示の人工腹膜組織と癌細胞とを共培養すること、及び共培養させた人工腹膜組織における癌細胞の挙動を観察することを含む、人工腹膜組織における癌細胞の挙動を評価する方法(以下、「本開示の評価方法」ともいう)に関する。
別の実施態様において、本開示は、本開示の人工腹膜組織と癌細胞とを共培養させること、癌細胞と接触させた人工腹膜組織と被験物質とを接触させること、及び前記癌細胞と接触させた人工腹膜組織に対する前記被験物質の作用を評価することを含む、抗癌剤の有効成分となる候補物質のスクリーニング方法(以下、「本開示のスクリーニング方法」ともいう)に関する。本開示のスクリーニング方法によれば、一つの実施形態において、本開示の人工腹膜組織を使用するため、従来の方法と比較して生体に近い環境で被検物質の評価を行うことができるという効果を奏しうる。
別の実施態様において、本開示は、本開示の人工腹膜組織と、癌細胞とを含む、抗癌剤の有効成分となる候補物質のスクリーニングを行うためのキット(以下、「本開示のスクリーニング用キット」ともいう)に関する。本開示のスクリーニング用キットによれば、一つの実施形態において、本開示のスクリーニング方法を行うことができる。
[1] 線維芽細胞、細胞外マトリックス、並びに管腔を形成する血管内皮細胞及びリンパ管内皮細胞の少なくとも一方を含む細胞組織と、前記細胞組織の表面を覆う中皮細胞層とを備える、人工腹膜組織。
[2] 前記管腔が、毛細血管様構造及びリンパ管様構造の少なくとも一方である、[1]記載の人工腹膜組織。
[3] 前記中皮細胞層が被蓋構造を形成し、前記中皮細胞が線維芽細胞と毛細血管様構造及びリンパ管様構造の少なくとも一方からなる組織に細胞外マトリックスを介して結合した、[1]記載の人工腹膜組織。
[4] 前記中皮細胞層の表面に微絨毛を有する、[1]から[3]のいずれかに記載の人工腹膜組織。
[5] 前記細胞外マトリックスが、フィブロネクチン及びゼラチンを少なくとも含む、[1]から[4]のいずれかに記載の人工腹膜組織。
[6] 前記細胞外マトリックスが、第1物質及び第2物質を含み、前記第1物質と前記第2物質との組み合わせが以下からなる群から選択される、[1]から[4]のいずれかに記載の人工腹膜組織:
(a)フィブロネクチン及びゼラチン;
(b)フィブロネクチン及びε-ポリリジン;
(c)フィブロネクチン及びヒアルロン酸;
(d)フィブロネクチン及びデキストラン硫酸;
(e)フィブロネクチン及びヘパリン;ならびに
(f)ラミニン及びゼラチン。
[7] 前記第1物質と前記第2物質との組み合わせがフィブロネクチン及びゼラチンである、[6]記載の人工腹膜組織。
[8] 線維芽細胞、細胞外マトリックス、並びに管腔を形成する血管内皮細胞及びリンパ管内皮細胞の少なくとも一方を含む細胞組織と、前記細胞組織の表面を覆う中皮細胞層とを備える人工腹膜組織の製造方法であって、血管内皮細胞及びリンパ管内皮細胞の少なくとも一方と線維芽細胞と細胞外マトリックスとを培養して前記細胞組織を形成すること、及び前記細胞組織上に中皮細胞を配置することを含む、人工腹膜組織の製造方法。
[9] 細胞組織の形成が、細胞外マトリックスで被覆された線維芽細胞を配置することを含む、[8]記載の人工腹膜組織の製造方法。
[10] 前記中皮細胞を、5.2×102細胞/mm2~1.3×103細胞/mm2の密度で配置する、[8]又は[9]に記載の人工腹膜組織の製造方法。
[11] 前記細胞外マトリックスが、フィブロネクチン及びゼラチンを少なくとも含む、[8]から[10]のいずれかに記載の人工腹膜組織の製造方法。
[12] 前記細胞外マトリックスが、第1物質及び第2物質を含み、前記第1物質と前記第2物質との組み合わせが以下からなる群から選択される、[8]から[10]のいずれかに記載の人工腹膜組織の製造方法:
(a)フィブロネクチン及びゼラチン;
(b)フィブロネクチン及びε-ポリリジン;
(c)フィブロネクチン及びヒアルロン酸;
(d)フィブロネクチン及びデキストラン硫酸;
(e)フィブロネクチン及びヘパリン;ならびに
(f)ラミニン及びゼラチン。
[13] 前記第1物質と前記第2物質との組み合わせがフィブロネクチン及びゼラチンである、[12]記載の人工腹膜組織の製造方法。
[14] [1]から[7]のいずれかに記載の人工腹膜組織を製造する、[8]から[13]のいずれかに記載の人工腹膜組織の製造方法。
50mM Tris-HCl(pH7.4):HCl(Nacalai Tesque社製)でpH7.4に調整した50mM Trisを、オートクレーブ(121℃、20分)で湿熱滅菌したもの
BFN:Fibronectin from bovine plasma(Sigma-Aldrich社製)
FN液:0.04mg BFN/1ml 50mM Tris-HCl(pH7.4) G液:0.04mg Gelatin/1ml 50mM Tris-HCl(pH7.4)
特開2012-115254号公報の記載に基づき被覆細胞を調製した。
<正常ヒト皮膚線維芽細胞(NHDF)>
細胞はNHDF、細胞外マトリックス成分はフィブロネクチン(FN)及びゼラチン(G)を使用した。細胞をFN液及びG液に交互に計9回浸漬させることによって、表面に(FN/G)4FN膜が形成された被覆NHDFを作製した(被膜の厚み:約10nm)。FN液の浸漬は5回、G液の浸漬は4回行った。なお、被膜の厚みは特開2012-115254号公報の実施例に記載の方法により測定した。
<ヒト臍帯静脈血管内細胞(HUVEC)>
NHDFに替えてHUVECを使用した以外は、上記と同様にして(FN/G)4FN膜が形成された被覆HUVECを作製した(被膜の厚み:約10nm)。
<ヒト皮膚リンパ管内皮細胞(HDLEC)>
NHDFに替えてHDLECを使用した以外は、上記と同様にして(FN/G)4FN膜が形成された被覆HDLECを作製した(被膜の厚み:約10nm)。
[血管網構造を有する人工腹膜組織の作製]
培養器として、有孔ポリエステルメンブラン(孔径:0.4μm)を備えるインサート及び24ウェルマルチプレートを準備した。インサート底面にBFNをコーティングした後、被覆NHDFを4×105細胞/well播種し、6時間培養し、NHDF層(4層)を作製した。NHDF層上に被覆HUVECを1×105細胞/well播種し、6時間培養した(HUVEC層:1層)。HUVEC層上に被覆NHDFを4×105細胞/well播種し、6時間培養し、HUVEC層上にNHDF層(4層)を作製した。HUVEC層上に作製したNHDF層の上に、ヒト大網由来中皮細胞を5×104細胞/well(1.3×103細胞/mm2)播種し、5日間培養して人工腹膜組織を得た。得られた人工腹膜組織を図1に示す。なお、培地は10%FBS含有DMEMを使用し、培養は5%CO2、37℃で行った。得られた人工腹膜組織は厚みが45μmであった。また、細胞組織の厚みは42μm、毛細血管様構造の径は18μm、中皮細胞層の厚みは3μmであった。これらの厚みは免疫染色像により測定した。
[リンパ管網構造を有する人工腹膜組織の作製]
被覆HUVECに替えて被覆HDLECを用いた以外は実施例1と同様にして人工腹膜組織を作製した。得られた人工腹膜組織を図2に示す。得られた人工腹膜組織は厚みが44μmであった。また、細胞組織の厚みは41μm、リンパ管様構造の径は13μm、中皮細胞層の厚みは3μmであった。図2Aは光学顕微鏡像、B~Dは透過型電子顕微鏡画像である。図2A~Dにおいて、Lはリンパ管様構造、Fbは線維芽細胞、及びECMは細胞外マトリックスをそれぞれ示す。図2Aの矢印は、中皮細胞によるシート構造を示す。得られた人工腹膜組織は、リンパ管内皮細胞により形成された管腔と線維芽細胞及び細胞外マトリックスを含む結合組織層とを有し、図2Aに示すように、結合組織層の表面が一層の中皮細胞で覆われた構造であることが確認できた。図2B~Dに示すように、リンパ管内皮細胞により形成された管腔は、リンパ管内皮細胞同士が接着する部分(図2Bの矢印)と、リンパ管内皮細胞が解離している部分(図2Dの矢印)とが確認され、生体の毛細リンパ管に近い構造であることが確認できた。
Claims (10)
- 線維芽細胞、細胞外マトリックス、並びに管腔を形成する血管内皮細胞及びリンパ管内皮細胞の少なくとも一方を含む細胞組織と、前記細胞組織の表面を覆う中皮細胞層とを備える、人工腹膜組織。
- 前記管腔が、毛細血管様構造及びリンパ管様構造の少なくとも一方である、請求項1記載の人工腹膜組織。
- 前記中皮細胞層が被蓋構造を形成し、前記中皮細胞は前記線維芽細胞と前記毛細血管様構造及び前記リンパ管様構造の少なくとも一方からなる組織に細胞外マトリックスを介して結合した、請求項2記載の人工腹膜組織。
- 前記中皮細胞層の表面に微絨毛を有する、請求項1から3のいずれかに記載の人工腹膜組織。
- 前記細胞外マトリックスが、フィブロネクチン及びゼラチンを少なくとも含む、請求項1から4のいずれかに記載の人工腹膜組織。
- 線維芽細胞、細胞外マトリックス、並びに管腔を形成する血管内皮細胞及びリンパ管内皮細胞の少なくとも一方を含む細胞組織と、前記細胞組織の表面を覆う中皮細胞層とを備える人工腹膜組織の製造方法であって、血管内皮細胞及びリンパ管内皮細胞の少なくとも一方と線維芽細胞と細胞外マトリックスとを培養して前記細胞組織を形成すること、及び前記細胞組織上に中皮細胞を配置することを含む、人工腹膜組織の製造方法。
- 細胞組織の形成が、細胞外マトリックスで被覆された線維芽細胞を配置することを含む、請求項6記載の人工腹膜組織の製造方法。
- 前記中皮細胞が、5.2×102細胞/mm2~1.3×103細胞/mm2の密度で配置される、請求項6又は7に記載の人工腹膜組織の製造方法。
- 前記細胞外マトリックスが、フィブロネクチン及びゼラチンを少なくとも含む、請求項6から8のいずれかに記載の人工腹膜組織の製造方法。
- 請求項1から5のいずれかに記載の人工腹膜組織を製造する、請求項6から9のいずれかに記載の人工腹膜組織の製造方法。
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WO2022181776A1 (ja) * | 2021-02-25 | 2022-09-01 | 学校法人関西医科大学 | 多能性幹細胞から腹膜中皮細胞を分化誘導する方法 |
WO2024085257A1 (ja) * | 2022-10-20 | 2024-04-25 | 学校法人慈恵大学 | 三次元組織培養物およびその製造方法 |
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WO2024085257A1 (ja) * | 2022-10-20 | 2024-04-25 | 学校法人慈恵大学 | 三次元組織培養物およびその製造方法 |
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EP3187580A1 (en) | 2017-07-05 |
JP6296262B2 (ja) | 2018-03-28 |
US20170283778A1 (en) | 2017-10-05 |
EP3187580B1 (en) | 2022-01-12 |
EP3187580A4 (en) | 2018-02-21 |
US10837002B2 (en) | 2020-11-17 |
JPWO2016031824A1 (ja) | 2017-06-08 |
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