WO2020189561A1 - 被覆固定剤 - Google Patents
被覆固定剤 Download PDFInfo
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- WO2020189561A1 WO2020189561A1 PCT/JP2020/011144 JP2020011144W WO2020189561A1 WO 2020189561 A1 WO2020189561 A1 WO 2020189561A1 JP 2020011144 W JP2020011144 W JP 2020011144W WO 2020189561 A1 WO2020189561 A1 WO 2020189561A1
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- alginate
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L31/00—Materials for other surgical articles, e.g. stents, stent-grafts, shunts, surgical drapes, guide wires, materials for adhesion prevention, occluding devices, surgical gloves, tissue fixation devices
- A61L31/02—Inorganic materials
- A61L31/028—Other inorganic materials not covered by A61L31/022 - A61L31/026
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
- A61L27/36—Materials for grafts or prostheses or for coating grafts or prostheses containing ingredients of undetermined constitution or reaction products thereof, e.g. transplant tissue, natural bone, extracellular matrix
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L24/00—Surgical adhesives or cements; Adhesives for colostomy devices
- A61L24/04—Surgical adhesives or cements; Adhesives for colostomy devices containing macromolecular materials
- A61L24/08—Polysaccharides
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
- A61L27/02—Inorganic materials
- A61L27/025—Other specific inorganic materials not covered by A61L27/04 - A61L27/12
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
- A61L27/14—Macromolecular materials
- A61L27/20—Polysaccharides
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
- A61L27/28—Materials for coating prostheses
- A61L27/34—Macromolecular materials
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
- A61L27/50—Materials characterised by their function or physical properties, e.g. injectable or lubricating compositions, shape-memory materials, surface modified materials
- A61L27/52—Hydrogels or hydrocolloids
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
- A61L27/50—Materials characterised by their function or physical properties, e.g. injectable or lubricating compositions, shape-memory materials, surface modified materials
- A61L27/54—Biologically active materials, e.g. therapeutic substances
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L31/00—Materials for other surgical articles, e.g. stents, stent-grafts, shunts, surgical drapes, guide wires, materials for adhesion prevention, occluding devices, surgical gloves, tissue fixation devices
- A61L31/04—Macromolecular materials
- A61L31/042—Polysaccharides
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L31/00—Materials for other surgical articles, e.g. stents, stent-grafts, shunts, surgical drapes, guide wires, materials for adhesion prevention, occluding devices, surgical gloves, tissue fixation devices
- A61L31/14—Materials characterised by their function or physical properties, e.g. injectable or lubricating compositions, shape-memory materials, surface modified materials
- A61L31/145—Hydrogels or hydrocolloids
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L31/00—Materials for other surgical articles, e.g. stents, stent-grafts, shunts, surgical drapes, guide wires, materials for adhesion prevention, occluding devices, surgical gloves, tissue fixation devices
- A61L31/14—Materials characterised by their function or physical properties, e.g. injectable or lubricating compositions, shape-memory materials, surface modified materials
- A61L31/16—Biologically active materials, e.g. therapeutic substances
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D105/00—Coating compositions based on polysaccharides or on their derivatives, not provided for in groups C09D101/00 or C09D103/00
- C09D105/04—Alginic acid; Derivatives thereof
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2300/00—Biologically active materials used in bandages, wound dressings, absorbent pads or medical devices
- A61L2300/40—Biologically active materials used in bandages, wound dressings, absorbent pads or medical devices characterised by a specific therapeutic activity or mode of action
- A61L2300/412—Tissue-regenerating or healing or proliferative agents
- A61L2300/414—Growth factors
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2400/00—Materials characterised by their function or physical properties
- A61L2400/06—Flowable or injectable implant compositions
Definitions
- the present invention relates to a coating fixing agent.
- Liver transplantation is one of the curative treatments for liver failure. Liver transplantation is performed at the same location as the removed recipient's liver, and the portal vein, hepatic artery, hepatic vein, and bile duct are anastomosed. Hepatocyte transplantation and mesenchymal stem cell transplantation, which have been developed to make up for the absolute shortage of donors for liver transplantation, administer cells from the portal vein or peripheral vein (Non-Patent Documents 1 and 2).
- the present inventors have devised a completely new transplantation method in which the coating of parenchymal organs such as the liver is peeled off and the tissue is directly attached.
- preparations that can be coated intraperitoneally include cellulose oxide and hyaluronic acid for preventing adhesive ileus.
- fibrin glue is used for the purpose of preventing bile leakage and rebleeding from the hepatic incision surface, but these preparations are not used as a coating fixative for tissue transplantation on the organ surface.
- An object of the present invention is to provide a coating-fixing agent for transplanting cells or tissues on the surface of an organ, mesentery, peritoneum or the like.
- the present inventors have succeeded in transplanting cells and tissues to the surface of an organ and then engrafting them by adding Ca ions to sodium alginate and using the gelled material as a coating material. It came to be completed. In addition, the addition of growth factors to sodium alginate promoted the growth of transplanted tissues.
- the gist of the present invention is as follows.
- (3) The preparation is an aqueous solution containing at least one selected from the group consisting of sodium alginate, potassium alginate and ammonium alginate, and gelates alginate by adding divalent or higher metal ions at the time of use.
- the preparation according to (1) The preparation according to (1).
- the growth factor is at least one selected from the group consisting of EGF, TGF beta, bFGF, IGF1, EGF, PDGF, NGF, HGF, VEGF and S1P.
- the transplant is a cell, a cell aggregate, a tissue or a combination thereof.
- the implant is transplanted to the transplant site of a human or non-human animal, an aqueous solution containing alginate is added dropwise to the implant, and a metal ion having a divalent value or higher is added dropwise to gel the alginate.
- a formulation kit for coating and fixing an implant which is a combination of a formulation containing alginate and a metal salt having a divalent value or higher.
- a method for transplanting a transplant which comprises transplanting the transplant to a transplant site of a human or non-human animal and coating the transplant with alginate.
- the transplant is transplanted to the transplant site of a human or non-human animal, and an aqueous solution containing at least one selected from the group consisting of sodium alginate, potassium alginate and ammonium alginate is added dropwise to the transplant, and 2
- the implant can be transplanted onto the surface of tissues and / or organs.
- This specification includes the contents described in the Japanese patent application, Japanese Patent Application No. 2019-53047 and / or drawings which are the basis of the priority of the present application.
- DPPIV + rat fetal liver tissue was transplanted onto the liver surface of a DPPIV-rat cirrhosis model, and coating was fixed using various preparations (sodium alginate, fibrin, cellulose oxide, sodium hyaluronate).
- the engraftment tissue 2 weeks after transplantation is shown. Upper: Macroscopic image of the cut surface. Bottom: DPPIV stained histology.
- the tissue engraftment rate after 2 weeks after transplantation of fetal liver tissue to the liver surface of a liver cirrhosis model and coating and fixation using various preparations (sodium alginate, fibrin, cellulose oxide, sodium hyaluronate) is shown.
- DPPIV + rat fetal liver tissue was transplanted onto the liver surface of a DPPIV-rat cirrhosis model, and coating and fixation was performed using sodium alginate. The engraftment tissue 3 weeks after transplantation is shown. Left: HE stain. Right: DPPIV staining.
- DPPIV + rat fetal liver tissue was transplanted onto the liver surface of a rat liver cirrhosis model, and the survival rate was shown for 3 weeks after transplantation, which was covered and fixed with sodium alginate.
- the transplanted (TP) group had a significantly improved survival rate compared to the non-transplanted (sham) group.
- TP transplanted
- sham non-transplanted
- PLT Platelets
- PT Prothrombin time
- AST Aspartate aminotransferase
- ALT Alanine aminotransferase
- ALB Albumin
- NH3 Ammonia
- T-Bil Total bilirubin. * p ⁇ 0.05 vs non-transplanted (sham) group.
- Human EGF was mixed with a gel obtained by reacting sodium alginate and calcium chloride, and the sustained release effect of human EGF on the supernatant (PBS) was examined. Low-viscosity sodium alginate showed a sustained sustained release of human EGF.
- DPPIV + rat fetal liver tissue was transplanted onto the liver surface of a DPPIV-rat liver cirrhosis model, and tissue engraftment was observed 2 weeks later.
- Fetal liver tissue was coated and fixed with low-viscosity sodium alginate alone and low-viscosity sodium alginate + growth factors (bFGF, EGF, NGF, TGF beta, PDGF) for comparison.
- the engraftment tissue 2 weeks after transplantation is shown. In the group to which the growth factor was added, the growth promoting effect of the engraftment tissue was observed.
- the present invention provides a preparation for coating and fixing a transplant, and the preparation containing alginate is provided.
- the alginate examples include a monovalent metal salt of alginic acid such as sodium alginate, potassium alginate, and ammonium alginate, and a divalent metal salt of alginic acid such as calcium alginate. Of these, the monovalent metal salt of alginic acid is preferable. , Sodium alginate is more preferred. Further, the alginate may be not only one kind but also a combination of two or more kinds.
- Alginic acid is a high molecular weight polysaccharide contained in the algae of brown algae, and is a polymer in which two types of uronic acids, D-mannuronic acid (M) and L-gluuronic acid (G), are linearly polymerized.
- the composition ratio (M / G ratio) of D-mannuronic acid and L-gluuronic acid differs depending on the type of seaweed from which it is derived, and even if it is the same species, it also differs depending on the habitat and season.
- Alginate is a neutral salt in the form of a carboxyl group of alginic acid bonded to a metal ion or an ammonium ion.
- Alginic acid is insoluble in water, but monovalent metal salts of alginic acid such as sodium alginate, potassium alginate, and ammonium alginate dissolve well in cold and hot water to form a viscous aqueous solution.
- a metal ion having a divalent value or higher for example, calcium ion
- ion cross-linking occurs instantly and gelation occurs.
- L-Gluronic acid (G) of alginic acid is mainly involved in the cross-linking reaction with divalent or higher metal ions, and alginic acid having a high ratio of G reacts quickly with divalent or higher metal ions and is formed.
- the gel to be made is hard and brittle.
- the alginate When the preparation is an aqueous solution containing at least one selected from the group consisting of sodium alginate, potassium alginate and ammonium alginate, the alginate is gelled by adding a divalent or higher metal ion at the time of use. Good. By gelling, a film is formed and it has a long-term tissue fixing force.
- the divalent or higher metal ion include magnesium ion, calcium ion, strontium ion, barium ion and the like, but calcium ion is preferable.
- aqueous solution of divalent or higher valent metal ions examples include aqueous solutions of metal salts such as calcium chloride, magnesium chloride, calcium sulfate, barium chloride, and strontium chloride.
- the ratio of monovalent metal salts of alginic acid (eg, sodium alginate, potassium alginate, ammonium alginate, etc.) to divalent or higher metal ions (eg, calcium ions) is 0.1-4.0% sodium alginate solution, 1 mM-500 mM chloride. 5 mM to 300 mM calcium chloride is preferred in calcium, more preferably in a 0.3-3.0% sodium alginate solution.
- the preparation of the present invention may be combined with a divalent or higher valent metal salt (for example, calcium chloride, magnesium chloride, calcium sulfate, barium chloride, strontium chloride, etc.) to form a kit.
- a divalent or higher valent metal salt for example, calcium chloride, magnesium chloride, calcium sulfate, barium chloride, strontium chloride, etc.
- the kit includes a solvent for preparing the preparation of the present invention or a solution of a metal salt having a valence of 2 or more (for example, purified water, distilled water, ion-exchanged water, MilliQ water, physiological saline, phosphate buffered saline, etc. ), A device for dropping the preparation of the present invention or a solution of a divalent or higher valent metal salt onto the transplantation site (syringe and injection needle, silicon mold (temporarily during transplantation operation so that alginic acid and calcium chloride do not scatter around) The transplanted tissue may be surrounded and removed after the coating is fixed), and the instruction manual may be included.
- a solvent for preparing the preparation of the present invention or a solution of a metal salt having a valence of 2 or more for example, purified water, distilled water, ion-exchanged water, MilliQ water, physiological saline, phosphate buffered saline, etc.
- the monovalent metal salt of alginic acid may have a low viscosity (20 to 100 mPa ⁇ s), a medium viscosity (100 to 200 mPa ⁇ s), or a high viscosity (400 to 600 mPa ⁇ s). Those with low viscosity are preferable.
- a sustained release action of the growth factor was observed by adding the growth factor to low-viscosity sodium alginate. When the engraftment tissue was coated and fixed with low-viscosity sodium alginate to which a growth factor was added, growth was promoted.
- the M / G ratio of the monovalent metal salt of alginic acid is preferably about 1.0 to 1.6.
- the viscosity of the alginic acid aqueous solution can be measured by a known method using, for example, a rotational viscometer (cone plate type).
- a known method is, for example, the 16th revised Japanese Pharmacopoeia general test method viscosity measurement method (cone-plate type rotational viscometer).
- the viscosity of the monovalent metal salt of alginic acid is determined by dissolving the monovalent metal salt of alginic acid in MilliQ water to make a 1 w / w% concentration solution, and using a cone plate type viscometer.
- the preparation of the present invention may further contain a growth factor.
- the growth factor may be EGF, TGFbeta, bFGF, IGF1, EGF, PDGF, NGF, HGF, VEGF, S1P or a combination thereof.
- the medical material used in the living body has a lower endotoxin than the conventional sodium alginate (Na alginate).
- Alginate Na which is used as a base material for prescription drugs (oral preparations) and wound dressings on the market, is made from alginate that has not been treated with low endotoxin (usually endotoxin content is tens of thousands to hundreds of thousands EU (usually tens of thousands to hundreds of thousands EU). Endotoxin unit) / g). It is preferable to improve the naturally-derived material containing a large amount of this endotoxin as a raw material that can be used more safely in the living body.
- the low endotoxin treatment can be carried out by a known method such as washing, filtration with a filter, ultrafiltration, purification using a column, adsorption to resin or activated carbon, organic solvent treatment, surfactant treatment, or a method similar thereto. ..
- the endotoxin level can be measured by a known method such as a method using a Limulus reagent or a method using a toxinometer.
- the method for treating the low endotoxin of alginate contained in the preparation of the present invention is not particularly limited, but the endotoxin content is preferably 500 EU / g or less, preferably 50 EU / g, when endotoxin measurement with a Limulus reagent is performed. It is / g or less, more preferably 30 EU / g or less.
- SeaMatrix registered trademark
- Mochida Pharmaceutical Co., Ltd. are commercially available and available.
- the preparation of the present invention may be in any dosage form such as liquid preparation, powder, and granule.
- the solvent may be any pharmaceutically acceptable solvent, and examples thereof include purified water, distilled water, ion-exchanged water, MilliQ water, physiological saline, and phosphate buffered saline. be able to. These solvents are preferably treated with low endotoxin.
- the concentration of alginate in the preparation is preferably 0.001 to 10 w / w%, preferably 0.005 to 8 w / w%, and more preferably 0.01 to 5.0 w / w%. ..
- the preparation of the present invention is a powder or granules
- excipients, binders, disintegrants and the like may be added.
- the concentration of alginate in the preparation is preferably 0.1 to 100 w / w%, preferably 1 to 80 w / w%, and more preferably 10 to 50 w / w%. Is.
- a solvent such as water at the time of use to use as a solution.
- solubilizers such as solubilizers, solubilizers, emulsifiers, dispersants, antioxidants, preservatives, and light-shielding agents may be added to the formulations of the present invention.
- the formulation of the present invention can be used to coat and immobilize the implant on the surface of an organ and / or tissue.
- Organs refer to organs in the abdominal cavity, but also include lungs, heart, and blood vessels. Examples of organs include liver, bile duct, intestinal tract, pancreas, kidney, heart, lung, blood vessel, trachea and the like.
- Tissue refers to a structure in which one or more types of cells are assembled in a certain pattern, such as connective tissue (skin, tendon, cartilage, bone, etc.), muscle tissue, nervous tissue (central nerves such as brain and spinal cord). Peripheral nerves, etc.) can be exemplified.
- transplanted product examples include cells, cell aggregates, tissues, and combinations thereof.
- the cell to be transplanted may be any cell that can be expected to exert its function by being transplanted into a living body, and examples thereof include functional cells constituting an organ or tissue, undifferentiated cells that differentiate into functional cells, and the like. .. Undifferentiated organs or tissue cells are differentiated into functional cells or organs constituting ectodermal organs such as brain, spinal cord, adrenal medulla, epidermis, hair / nail / skin glands, sensory organs, peripheral nerves, and crystalline organs.
- ectodermal organs such as brain, spinal cord, adrenal medulla, epidermis, hair / nail / skin glands, sensory organs, peripheral nerves, and crystalline organs.
- Functional cells that make up the mesodermal organs such as possible cells, kidneys, urinary tract, heart, blood, gonads, adrenal cortex, muscles, skeleton, dermal, connective tissue, mesentery, or cells that can differentiate into those organs, liver, Functional cells constituting endoderm organs such as pancreas, intestinal tract, lungs, thyroid gland, parathyroid gland, and urinary tract, or cells capable of differentiating into these organs can be mentioned.
- hepatoblast hepatic progenitor cells, pancreatoblast, hepatic precursor cells, pancreatoblast, pancreatic progenitors, pancreatic progenitor cells, pancreatic precursor cells, endocrine precursor, internal progenitor cells, intestinal progenitor cells , Metanephric mesenchymal precursor cells, multipotent nephron progenitor, renal progenitor cell, cardiac mesoderm, cardiovascular progenitor cells, cardiac progenitor cells, (JR. Spence, et al. Nature .; 470 (733) , Et al. EMBO J .; 25 (21): 5214-5228. (2006), J.
- Undifferentiated organs or histiocytes can be prepared from pluripotent stem cells such as induced pluripotent stem cells (iPS cells) and embryonic stem cells (ES cells) according to known methods.
- the cells may be derived from an organ or tissue, or may be derived from cancer, and a cancer model animal can be prepared by transplanting the cancer cells into a non-human animal.
- the cell aggregate to be transplanted may be any cell aggregate such as an organoid, a spheroid, a cell aggregate, or a cell sphere, and even if it contains one type of cell, two or more types of cells May be included.
- An "organ bud” is a structure that can differentiate into an organ by maturation. As an example, in WO2013 / 047639, an organ or tissue cell (precursor cell), a vascular cell (preferably a blood vessel).
- a method for producing an organ bud from three types of cells (endothelial cell) and an undifferentiated mesenchymal cell or a cell differentiated from the cell is disclosed. By using the preparation of the present invention, the organ bud produced by this method is disclosed.
- the organ bud produced by this method is disclosed.
- the tissue to be transplanted may be a tissue separated from an individual (for example, all or a part of a tissue constituting an organ such as an organ), or differentiated into a functional cell or a functional cell constituting the organ or tissue. It may be a tissue derived from undifferentiated cells or pluripotent cells.
- a tissue derived from a living body could be suitably transplanted into a living body and engrafted (Examples described later).
- the preparation of the present invention was found to have a growth-promoting effect on transplanted tissues as compared with fibrin glue, cellulose oxide, and sodium hyaluronate.
- a transplant is transplanted to a transplant site of a human or non-human animal, an aqueous solution containing alginate is added dropwise to the transplant, and a metal ion having a valence of 2 or more is added dropwise to obtain alginate. It can be used in the form of gelling and coating the implant.
- the transplant site may be a site where the coating covering the tissues and / or organs of human or non-human animals has been peeled off.
- the present invention also provides a method for transplanting a transplant, which comprises transplanting the transplant into a human or non-human animal transplant site and coating the transplant with alginate.
- the transplant is transplanted to the transplant site of a human or non-human animal, and an aqueous solution containing at least one selected from the group consisting of sodium alginate, potassium alginate and ammonium alginate is added dropwise to the transplant, and the divalent solution is further added.
- the above metal ions can be added dropwise to gel the alginate to coat the implant.
- the transplant site may be a site where the coating covering the tissues and / or organs of human or non-human animals has been peeled off.
- non-human animals examples include mice, rats, rabbits, pigs, dogs, monkeys, cows, horses, sheep, and chickens.
- membrane covering tissues and / or organs examples include mesentery, peritoneum, cerebral pia mater, fascia, epicardium, visceral pleura, intestinal serosa, hepatic capsule, and renal capsule.
- the coating can be peeled off using an injection needle, an electric scalpel, a bipolar electric scalpel, a surgical scalpel, an ultrasonic surgical device (CUSA), etc.
- the amount of alginate used is preferably 0.1 to 100 mg, preferably 1 to 10 mg, and more preferably 2 to 5 mg per 1 cm 2 of the transplant site.
- Alginate and divalent or higher metal ions can be dropped using a syringe, dropper, nebulizer, or the like.
- the preparation and transplantation method of the present invention include tissue transplantation to the liver surface for the treatment of liver cirrhosis, treatment of chronic hepatitis such as non-alcoholic steatohepatitis and alcoholic hepatitis, lung, kidney, pancreas, and other organs or tissues. It can be used for regenerative medicine, etc.
- Example 1 Experimental method ⁇ Coating agent for transplantation
- sodium alginate Mochida Pharmaceutical SeaMatrix diluted 1% is used, AL20 / viscosity 20 ⁇ 100mPa ⁇ s, AL100 / viscosity 100 ⁇ 200mPa ⁇ s, AL500 / viscosity 400 ⁇ 600 mPa ⁇ s), Matrigel (Corning), Fibrinogen (Sigma Aldrich F8630), Thrombin (Sigma Aldrich T7513), Fibrin was used by mixing fibrinogen and thrombin at a ratio of 100: 1 immediately before use.
- Growth factor bFGF (Sigma B5887 0.1pg / ml), EGF (Sigma E9644 1ng / ml), NGF (Sigma N1408 0.2ng / ml), IGF-1 (Sigma I3769 15ng / ml), TGFbeta (Sigma H8541 2.5 ⁇ g / ml), PDGF (Sigma P3201 12 pg / ml).
- liver cirrhosis model rats DPP4-F344 rats (Charles River, Japan, Kanagawa, Japan) 3 weeks old was acclimatized for 2 weeks, and N-Nitrosodimethylamin (WAKO) (DMN) was 10 mg / kg (Body) 3 times a week every day. Weight) concentration was injected intraperitoneally for 3 weeks.
- IL2rg KO F344 rats used those provided by Kyoto University.
- Liver tissue was collected from a 14-day-old fetus of DPPIV + F344 rats (Japan SLC, Shizuoka, Japan) and used.
- the cells were washed 3 times with PBST for 10 minutes, and then a secondary antibody solution appropriately diluted with Blocking One was placed on the reaction, and the mixture was reacted at room temperature for 1 hour. After that, wash with PBS for 10 minutes, add DAPI (4', 6-diamidino-2-phenylindole dihydrochloride, invitrogen) mixed with Apache encapsulant (WAKO) at a ratio of 1: 1000, and slide glass (MATSUNAMI). Was covered and enclosed.
- DAPI 4, 6-diamidino-2-phenylindole dihydrochloride, invitrogen
- WAKO Apache encapsulant
- MATSUNAMI slide glass
- the antibodies used are as follows. Primary antibody Anti-Rat CD26 (BD Bioscience, 559639) ⁇ Anti-Rat CD31 (BD Bioscience, 550300) ⁇ Anti-Keratin CK19 (Progen Biotechnik GmbH, 61029) ⁇ Anti-Rat Hepatic Sinusoid Endothelial Cell (SE-1) (Immuno-Biological Laboratories, 10078) ⁇ Anti-HNF4 ⁇ (H-1) (Santa Cruz, sc-374229) Anti-human Albumin (Sigma) Anti-human nuclei (Merck MAB1281)
- Rat sera were collected and measured using a hyaluronic acid ELISA kit (duoset, Invitrogen).
- HE intrahepatic endoderm cells
- HE human iPS cell-derived endoderm cells
- PXB cells PXB cells (Phoenix Bio) Etc.
- Dexamethasone and Oncostatin M were added to a 1: 1 mixture of GM BulletKit (manufactured by Lonza) and HCM BulletKit (manufactured by Lonza) excluding hEGF (recombinant human epidermal growth factor). I used the one.
- MC mesenchymal cells
- MC mesenchymal cells
- vascular cells for EC, any of human iPS cell-derived vascular endothelial cells (Cell Reports 21, 2661-2670, 2017), normal umbilical vein endothelial cells (HUVEC), etc. was used.
- HUVEC uses EGM (registered trademark) Bulletkit (registered trademark) for cells isolated from the umbilical cord provided at the time of delivery of pregnant women who have obtained explanation and consent, or purchased cells (HUVECs (Lonza, cat. No. 191027), etc.). ) (Lonza CC-4133) was used, and the cells were cultured within 5 passages.
- the tissue transplantation method used in this study is a method that can sympatrically engraft larger tissues in the liver than the cells used for portal vein transplantation, which is performed as conventional cell therapy. .. Therefore, it is considered to contribute to solving the number of transplanted cells, which is a problem in portal vein transplantation.
- bFGF growth factors
- the new coating fixative according to the present invention 1. Low invasiveness to transplanted tissue 2. Long-term engraftment of transplanted tissue is possible 3. Significant improvement over the conventional technique has been seen in that it contributes to the promotion of proliferation and maturation of the transplanted tissue. Further, by adding an arbitrary growth factor to the reduced viscosity sodium alginate, it is possible to contribute to further promotion of the growth of the transplanted tissue.
- the present invention can be used for transplantation of cells, cell aggregates and tissues into a living body.
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Abstract
Description
1. 移植組織への侵襲性が低い
2. 移植組織の長期生着が可能であること
3. 移植組織の増殖促進や成熟化に寄与すること
等があげられるが、従来技術ではそれらの課題を解決できていない。
(1)移植物を被覆固定するための製剤であって、アルギン酸塩を含有する前記製剤。
(2)アルギン酸塩が、アルギン酸ナトリウム、アルギン酸カリウム、アルギン酸カルシウム及びアルギン酸アンモニウムからなる群より選択される少なくとも1種である(1)記載の製剤。
(3)製剤が、アルギン酸ナトリウム、アルギン酸カリウム及びアルギン酸アンモニウムからなる群より選択される少なくとも1種を含有する水溶液であり、使用時に、2価以上の金属イオンを添加することによりアルギン酸塩をゲル化させる(1)記載の製剤。
(4)2価以上の金属イオンがカルシウムイオンである(3)記載の製剤。
(5)さらに、増殖因子を含む(1)~(4)のいずれかに記載の製剤。
(6)増殖因子が、EGF、TGF beta、bFGF、IGF1、EGF、PDGF、NGF、HGF、VEGF及びS1Pからなる群より選択される少なくとも1種である(5)記載の製剤。
(7)移植物が、細胞、細胞集合体、組織又はそれらの組み合わせである(1)~(6)のいずれかに記載の製剤。
(8)移植物を臓器及び/又は組織の表面に被覆固定するための(1)~(7)のいずれかに記載の製剤。
(9)ヒト又は非ヒト動物の移植部位に移植物を移植し、移植物にアルギン酸塩を含有する水溶液を滴下し、さらに、2価以上の金属イオンを滴下して、アルギン酸塩をゲル化して、移植物を被覆することを特徴とする、(1)~(8)のいずれかに記載の製剤。
(10)移植部位が、ヒト又は非ヒト動物の組織及び/又は臓器を覆っている被膜を剥離した部位である(9)記載の製剤。
(11)アルギン酸塩を含有する製剤と2価以上の金属塩とを組み合わせた、移植物を被覆固定するための製剤キット。
(12)ヒト又は非ヒト動物の移植部位に移植物を移植し、アルギン酸塩で移植物を被覆することを含む、移植物の移植方法。
(13)ヒト又は非ヒト動物の移植部位に移植物を移植し、移植物にアルギン酸ナトリウム、アルギン酸カリウム及びアルギン酸アンモニウムからなる群より選択される少なくとも1種を含有する水溶液を滴下し、さらに、2価以上の金属イオンを滴下して、アルギン酸塩をゲル化して、移植物を被覆する(12)記載の移植方法。
(14)移植部位が、ヒト又は非ヒト動物の組織及び/又は臓器を覆っている被膜を剥離した部位である(12)又は(13)記載の移植物の移植方法。
本明細書は、本願の優先権の基礎である日本国特許出願、特願2019‐53047の明細書および/または図面に記載される内容を包含する。
本発明は、ヒト又は非ヒト動物の移植部位に移植物を移植し、アルギン酸塩で移植物を被覆することを含む、移植物の移植方法も提供する。例えば、ヒト又は非ヒト動物の移植部位に移植物を移植し、移植物にアルギン酸ナトリウム、アルギン酸カリウム及びアルギン酸アンモニウムからなる群より選択される少なくとも1種を含有する水溶液を滴下し、さらに、2価以上の金属イオンを滴下して、アルギン酸塩をゲル化して、移植物を被覆することができる。移植部位は、ヒト又は非ヒト動物の組織及び/又は臓器を覆っている被膜を剥離した部位であるとよい。
〔実施例1〕
実験方法
・移植用被覆剤
移植用被覆剤として、アルギン酸ナトリウム(持田製薬SeaMatrix を1%希釈して使用、AL20/粘度20~100mPa・s, AL100/粘度100~200mPa・s, AL500/粘度 400~600mPa・s)、マトリゲル (Corning)、フィブリノーゲン(Sigma Aldrich F8630), トロンビン(Sigma Aldrich T7513), フィブリンはフィブリノーゲンとトロンビンを100:1で使用直前に混合させ用いた。酸化セルロース(ジョンソン エンド ジョンソン)、ヒアルロン酸ナトリウム(科研製薬)を用いた。アルギン酸ナトリウムは組織上に添加後、塩化カルシウム(ナカライテスクを蒸留水にて10%に希釈して使用)溶液を滴下してゲル化した。
bFGF(Sigma B5887 0.1pg/ml), EGF (Sigma E9644 1ng/ml), NGF (Sigma N1408 0.2ng/ml), IGF-1(Sigma I3769 15ng/ml), TGFbeta (Sigma H8541 2.5μg/ml), PDGF (Sigma P3201 12pg/ml)。
DPP4- F344ラット (日本チャールズリバー、神奈川、日本)3週齢を2週間順化させ、週3回連日でN-Nitrosodimethylamin (WAKO) (DMN)を10 mg/kg (Body Weight)の濃度で3週間腹腔内に注射した。IL2rg KO F344ラットは京都大学より提供されたものを使用した。
DPPIV+ F344ラット (日本SLC、静岡、日本)の胎齢14日の胎仔より肝組織を採取して使用した。
ラットの門脈血流を血管クランプ鉗子で遮断したのち、中葉表面を18G注射針 (TERUMO)で鋭利に剥離した。剥離後、綿棒で圧迫止血し、胎齢14日目の胎仔肝組織を移植し、上から被覆剤を用いて被覆し、血管クランプ鉗子を外したのちに閉腹した。移植14日後に肝臓を摘出して生着組織を比較検討した。
凍結組織切片をAcetone (WAKO)とChloroform (WAKO)を等量混合した溶液を用いて組織固定した。その後1xPBS 1mLに対して1mgの割合でFast Blue BB Salt hemi (zinc chloride)salt (SIGMA-ALDRICH)を溶解した液と、Dimethyl Sulfoxide (WAKO)1mLに対して8mgの割合でGly-Pro 4-methoxy-β-naphthylamide hydrochloride (SIGMA-ALDRICH)を溶解した液を20:1で混合し作成した染色液で常温で20分、酵素組織化学染色を行なった。染色後、硫酸銅 (II)五水和物 (WAKO)をMilli Q水に溶解して作製した2%硫酸銅水溶液に5分浸け、色素を定着させた。その後、10%ホルマリンに10分浸し組織固定を行い、Milli Q水に置換した後、Carrazi’s Haematoxylin (武藤化学)で10分間、染色を行った。水道水で洗浄後、流水で30分間色だしを行った。最後にアパチ封入剤 (WAKO)を滴下し、スライドグラス (MATSUNAMI)を被せて封入した。
凍結組織切片をAcetone (WAKO)とMethanol (WAKO)を等量混合した溶液で組織固定を行なった。風乾後、染色対象を撥水ペン (DAKO)で囲み、撥水処理後、0.05% Tween20-PBS (PBST)で10分、3回透過処理を行った。次に、Blocking One (ナカライテスク)を用い、室温で1時間ブロッキングを行なった。その後、Blocking Oneで適切な濃度に希釈した一次抗体溶液をのせて、4℃でOver Night反応させた。反応後、PBSTで10分、3回洗浄した後、Blocking Oneで適切に希釈した二次抗体溶液をのせて、室温で1時間反応させた。その後、PBSで10分間洗浄を行い、DAPI (4’,6-diamidino-2-phenylindole dihydrochloride、invitrogen)をアパチ封入剤 (WAKO)に1:1000で混合したものを滴下し、スライドグラス (MATSUNAMI)を被せて封入した。
一次抗体
Anti-Rat CD26 (BD Bioscience、559639)
・ Anti-Rat CD31 (BD Bioscience、550300)
・ Anti-Keratin CK19 (Progen Biotechnik GmbH、61029)
・ Anti-Rat Hepatic Sinusoid Endothelial Cell (SE-1) (Immuno-Biological Laboratories、10078)
・ Anti-HNF4α (H-1) (Santa Cruz、sc-374229)
Anti-human Albumin (Sigma)
Anti-human nuclei (Merck MAB1281)
実験に用いた動物から採取した血液をコアグチェック(登録商標)XS (ロシュ)を用いて測定を行った。
実験に用いた動物から採取した血液をEDTAで抗凝固処理したのちに、全自動血球計数器 MEK-6550 セルタックα (日本光電)を用いて測定を行った。
血液生化学検査
実験に用いた動物から採取した血液を4000rpm、20分間遠心し、血清を回収した。回収した血清を富士ドライケムスライド (富士フィルム)を用いてAST (アスパラギン酸アミノトランスフェラーゼ)、ALT (アラニンアミノトランスフェラーゼ)、NH3 (アンモニア)、ALB (アルブミン)、T-Bil (総ビリルビン)について解析を行った。測定には、DRI-CHEM 7000V (富士フィルム)を使用した。
ラット血清を採取し、ヒアルロン酸ELISA kit(duoset, インビトロジェン)を用いて測定した。
(1)肝内胚葉細胞(HE)の調製
HEについてはヒトiPS細胞由来肝内胚葉細胞(Cell Reports 21, 2661-2670, 2017)、PXB細胞(フェニックスバイオ社)などを用いた。培地はGM BulletKit(Lonza社製)とHCM BulletKit(Lonza社製)よりhEGF(組換えヒト上皮細胞成長因子)を除いたものとを1:1で混ぜたものに、Dexamethasone、Oncostatin Mを添加したものを用いた。
(2)間葉系細胞(MC)の調製
MCについては、ヒト骨髄より分離した細胞 (Lonza, cat. No. PT-2501)他、ヒト臍帯間質(ワルトン鞘)より分離した細胞、ヒトiPS細胞由来間葉系細胞(Cell Reports 21, 2661-2670, 2017)などのいずれかを用いた。本実験で主として用いた、ヒト骨髄より分離した間葉系幹細胞(Mesenchymal Stem Cell: hMSC) は、hMSC培養に調製された専用の培地(MSCGM2TM (登録商標))(Promocell C-28009)を用いて培養した。
(3)血管細胞(EC)の調製
ECについては、ヒトiPS細胞由来血管内皮細胞(Cell Reports 21, 2661-2670, 2017)、正常臍帯静脈内皮細胞(Normal Umbilical Vein Endothelial Cells: HUVEC)などのいずれかを用いた。HUVECは、説明と同意を取得した妊産婦の分娩時に提供を頂いた臍帯より分離した細胞、ないし購入した細胞(HUVECs (Lonza, cat. No. 191027)他)をEGM(登録商標)Bulletkit(登録商標)(Lonza CC-4133)を用いて、5回以内の継代回数で培養したものを用いた。
(4)3種細胞集合体
マトリゲルコーティング(Corning(登録商標)Matrigel(登録商標)の原液、ないしマトリゲルと培地を1:1の割合で混合した溶液を1ウェル毎に300μlずつ入れ、37℃、5% CO2のインキュベーター内に10分以上静置し固めた)を行った、24ウェルプレートの1ウェルに細胞数として5x105 cellsのiPS細胞由来肝内胚葉細胞、ないしヒト成体肝細胞と、3.5x105 cellsのヒトiPS細胞由来血管細胞またはヒト臍帯静脈由来血管内皮細胞、1x104 cellsのヒトiPS細胞由来間葉系細胞またはヒト間葉系細胞と混合後、37℃のインキュベーターで2日間培養した。マイクロパターンプレートを用いて3種細胞集合体を作製することも可能である。
・ラット肝臓表面への胎仔肝組織移植における最適な被覆剤の検討
N-Nitrosodimethylamin (WAKO) (DMN)投与2週間後の肝硬変状態のラット肝表面に胎仔肝組織を移植し、アルギン酸ナトリウム、フィブリン、酸化セルロース、ヒアルロン酸ナトリウムでそれぞれ被覆固定を行った(図1a)。DPPIV染色により移植組織の生着を確認したところ、全ての被覆剤において7割以上の生着率を確認した (図1b)。それぞれの被覆剤による生着組織の最大割面積を比較したところ、4種の被覆剤の中ではアルギン酸ナトリウムが有意に高いことを確認した (図1c)。
ラット非代償性肝硬変モデルにおける肝臓表面へのラット胎仔肝移植による治療効果を検討した。その結果、アルギン酸ナトリウム被覆による肝表面へのラット胎仔肝組織移植において、移植組織の生着及び脈管構造の構築と肝組織の成熟を確認した (図2a)。また、sham手術群(肝被膜の剥離操作のみ施行)と比較検討し、肝表面へのラット胎仔肝組織移植において生存率が改善することが確認された (図2b)。血液生化学検査を行ったところ、移植一週間後に肝機能マーカーであるAST, ALTの改善が見られた。またChild-Pugh分類関連マーカーであるT-Bil、NH3の改善、プロトロンビン時間の短縮、血中ALB、移植1週間後の血中ヒアルロン酸が有意に改善した(図2c)。
本研究で用いた組織移植法は、従来の細胞治療として行われている経門脈的移植に用いる細胞よりも、大きな組織を肝臓へ同所的に生着させることが可能な手法である。そのため、経門脈的移植における課題である移植細胞数の解決に寄与することが考えられる。マトリゲルに含まれている増殖因子 (bFGF, EGF, IGF-1, PDGF, NGF, TGF beta)を添加したアルギン酸ナトリウムを用いる事により移植組織の増殖性を更に高めることが可能である。
1. 移植組織への侵襲性が低い
2. 移植組織の長期生着が可能である
3. 移植組織の増殖促進や成熟化に寄与する
という点で従来技術より大幅な改善が見られている。さらに低粘度化したアルギン酸ナトリウムに任意の増殖因子を添加することにより、さらなる移植組織の増殖促進に寄与することが出来る。
Claims (14)
- 移植物を被覆固定するための製剤であって、アルギン酸塩を含有する前記製剤。
- アルギン酸塩が、アルギン酸ナトリウム、アルギン酸カリウム、アルギン酸カルシウム及びアルギン酸アンモニウムからなる群より選択される少なくとも1種である請求項1記載の製剤。
- 製剤が、アルギン酸ナトリウム、アルギン酸カリウム及びアルギン酸アンモニウムからなる群より選択される少なくとも1種を含有する水溶液であり、使用時に、2価以上の金属イオンを添加することによりアルギン酸塩をゲル化させる請求項1記載の製剤。
- 2価以上の金属イオンがカルシウムイオンである請求項3記載の製剤。
- さらに、増殖因子を含む請求項1~4のいずれかに記載の製剤。
- 増殖因子が、EGF、TGF beta、bFGF、IGF1、EGF、PDGF、NGF、HGF、VEGF及びS1Pからなる群より選択される少なくとも1種である請求項5記載の製剤。
- 移植物が、細胞、細胞集合体、組織又はそれらの組み合わせである請求項1~6のいずれかに記載の製剤。
- 移植物を臓器及び/又は組織の表面に被覆固定するための請求項1~7のいずれかに記載の製剤。
- ヒト又は非ヒト動物の移植部位に移植物を移植し、移植物にアルギン酸塩を含有する水溶液を滴下し、さらに、2価以上の金属イオンを滴下して、アルギン酸塩をゲル化して、移植物を被覆することを特徴とする、請求項1~8のいずれかに記載の製剤。
- 移植部位が、ヒト又は非ヒト動物の組織及び/又は臓器を覆っている被膜を剥離した部位である請求項9記載の製剤。
- アルギン酸塩を含有する製剤と2価以上の金属塩とを組み合わせた、移植物を被覆固定するための製剤キット。
- ヒト又は非ヒト動物の移植部位に移植物を移植し、アルギン酸塩で移植物を被覆することを含む、移植物の移植方法。
- ヒト又は非ヒト動物の移植部位に移植物を移植し、移植物にアルギン酸ナトリウム、アルギン酸カリウム及びアルギン酸アンモニウムからなる群より選択される少なくとも1種を含有する水溶液を滴下し、さらに、2価以上の金属イオンを滴下して、アルギン酸塩をゲル化して、移植物を被覆する請求項12記載の移植方法。
- 移植部位が、ヒト又は非ヒト動物の組織及び/又は臓器を覆っている被膜を剥離した部位である請求項12又は13記載の移植物の移植方法。
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| JP2021507310A JP7440100B2 (ja) | 2019-03-20 | 2020-03-13 | 被覆固定剤 |
| CN202080020657.8A CN113573746A (zh) | 2019-03-20 | 2020-03-13 | 包覆固定剂 |
| CN202310685797.2A CN116712618A (zh) | 2019-03-20 | 2020-03-13 | 包覆固定剂 |
| EP20774456.6A EP3943129A4 (en) | 2019-03-20 | 2020-03-13 | COATING PROTECTION AGENT |
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| Publication number | Publication date |
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| JPWO2020189561A1 (ja) | 2020-09-24 |
| US20220184271A1 (en) | 2022-06-16 |
| CN116712618A (zh) | 2023-09-08 |
| US12558452B2 (en) | 2026-02-24 |
| JP7440100B2 (ja) | 2024-02-28 |
| EP3943129A4 (en) | 2022-12-14 |
| CN113573746A (zh) | 2021-10-29 |
| EP3943129A1 (en) | 2022-01-26 |
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