Abstract:
The present invention provides a means for reconstituting tissues and organs having mature functions.A method of preparing a tissue or an organ, comprising coculturing an organ cell with a vascular endothelial cell and a mesenchymal cell, generating an organ bud, transplanting the organ bud into a non-human animal, and then isolating from the non-human animal the transplanted organ bud-derived tissue or organ.
Abstract:
An object of the present invention is to provide a cell structure for brain damage treatment which does not contain glutaraldehyde and in which it is possible to exhibit a sufficient effect of treating brain damage, a production method thereof, and a brain damage treatment agent. According to the present invention, there is provided a cell structure for brain damage treatment which contains biocompatible macromolecular blocks and at least one kind of cell and in which a plurality of the biocompatible macromolecular blocks are disposed in gaps between a plurality of the cells, in which the tap density of the biocompatible macromolecular block is 10 mg/cm3 to 500 mg/cm3 or a value obtained by dividing a square root of a cross-sectional area in a two-dimensional cross-sectional image of the biocompatible macromolecular block by a peripheral length is 0.01 to 0.13.
Abstract:
A nanocomposite hydrogel formed from free radical dissociation of an initiator and polymerization of a water soluble monomer. The resulting hydrogel finds particular application within the medical field for both soft and hard tissue repair in human and animals. The hydrogel is particularly advantageous for spinal disc repair.
Abstract:
A printed tissue construct comprises one or more tissue patterns, where each tissue pattern comprises a plurality of viable cells of one or more predetermined cell types. A network of vascular channels interpenetrates the one or more tissue patterns. An extracellular matrix composition at least partially surrounds the one or more tissue patterns and the network of vascular channels. A method of printing a tissue construct with embedded vasculature comprises depositing one or more cell-laden filaments, each comprising a plurality of viable cells, on a substrate to form one or more tissue patterns. Each of the one or more tissue patterns comprises one or more predetermined cell types. One or more sacrificial filaments, each comprising a fugitive ink, are deposited on the substrate to form a vascular pattern interpenetrating the one or more tissue patterns. The vascular pattern and the one or more tissue patterns are at least partially surrounded with an extracellular matrix composition. The fugitive ink is then removed to create vascular channels in the extracellular matrix composition, thereby forming an interpenetrating vascular network in a tissue construct.
Abstract:
The present invention provides a method of constituting a tissue construct in vitro using a tissue without depending on scaffold materials.A method of integrating a biological tissue with a vascular system in vitro, comprising coculturing a biological tissue with vascular cells and mesenchymal cells. A biological tissue which has been integrated with a vascular system by the above-described method. A method of preparing a tissue or an organ, comprising transplanting the biological tissue described above into a non-human animal and differentiating the biological tissue into a tissue or an organ in which vascular networks have been constructed. A method of regeneration or function recovery of a tissue or an organ, comprising transplanting the biological tissue described above into a human or a non-human animal and differentiating the biological tissue into a tissue or an organ in which vascular networks have been constructed. A method of preparing a non-human chimeric animal, comprising transplanting the biological tissue described above into a non-human animal and differentiating the biological tissue into a tissue or organ in which vascular networks have been constructed. A method of evaluating a drug, comprising using at least one member selected from the group consisting of the biological tissue described above, the tissue or organ prepared by the method described above, and the non-human chimeric animal prepared by the method described above. A composition for regenerative medicine, comprising a biological tissue which has been integrated with a vascular system by the method described above.
Abstract:
Therapeutic and drug delivery systems are provided in the form of medical devices with coatings for capturing and immobilizing target cells such as circulating progenitor or genetically-altered mammalian cells in vivo. The genetically-altered cells are transfected with genetic material for expressing a marker gene and at least one therapeutic gene in a constitutively or controlled manner. The marker gene is a cell membrane antigen not found in circulating cells in the blood stream and therapeutic gene encodes a peptide for the treatment of disease, such as, vascular disease and cancer. The coating on the medical device may be a biocompatible matrix comprising at least one type of ligand, such as antibodies, antibody fragments, other peptides and small molecules, which recognize and bind the target cells. The therapeutic and/or drug delivery systems may be provided with a signal source such as activator molecules for stimulating the modified cells to express and secrete the desired marker and therapeutic gene products.
Abstract:
Described herein are bioprinters comprising: one or more printer heads, wherein a printer head comprises a means for receiving and holding at least one cartridge, and wherein said cartridge comprises contents selected from one or more of: bio-ink and support material; a means for calibrating the position of at least one cartridge; and a means for dispensing the contents of at least one cartridge. Further described herein are methods for fabricating a tissue construct, comprising: a computer module receiving input of a visual representation of a desired tissue construct; a computer module generating a series of commands, wherein the commands are based on the visual representation and are readable by a bioprinter; a computer module providing the series of commands to a bioprinter; and the bioprinter depositing bio-ink and support material according to the commands to form a construct with a defined geometry.
Abstract:
The invention provides a method for maintaining capillary lumen diameter, reducing a decrease in capillary vessel lumen diameter or expanding capillary vessel lumen diameter in a re-endothelialized decellularized organ or tissue graft with an intact extracellular matrix vascular network. The method is based on administration of endothelial cells and microparticles to the decellularized ECM.
Abstract:
The present invention provides a human corneal endothelial cell sheet having a curvature fitting a human corneal endothelial surface, particularly, the human corneal endothelial cell sheet supported by a cell support having a curvature fitting a human corneal endothelial surface, and a production method of a human corneal endothelial cell sheet having a curvature fitting a human corneal endothelial surface, which includes the following steps: (1) a step of gelling a gelatin aqueous solution poured into a template having a curvature fitting a human corneal endothelial surface; (2) a step of forming a sheet-like gelatin by drying the gelled gelatin obtained in (1); (3) a step of obtaining a gelatin sheet by thermally crosslinking the sheet-like gelatin obtained in (2); (4) a step of seeding human corneal endothelial cells on the gelatin sheet obtained in (3) to form a human corneal endothelial cell layer.
Abstract:
The present invention provides: a method for producing mixed cells comprising cardiomyocytes, endothelial cells and mural cells from induced pluripotent stem cells, the method comprising (a) a step of producing cardiomyocytes from induced pluripotent stem cells and (b) a step of culturing the cardiomyocytes in the presence of VEGF; and a therapeutic agent for heart diseases, comprising the mixed cells produced by the method.