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38 results about "Megakaryocytic cell" patented technology

Methods and compositions for the differentiation of stem cells

The present invention provides methods and compositions for the production of hematopoietic progenitor cells or endothelial progenitor cells from human pluripotent stem cells using a defined cell culture medium without the need to utilize feeder cells or serum. In some embodiments, differentiation is accomplished using hypoxic atmospheric conditions. The defined medium of the present invention may contain growth factors and a matrix component. The hematopoietic progenitor cells may be further differentiated into cell lineages including red blood cells, macrophages, granulocytes, and megakaryocytes. The endothelial progenitor cells may be further differentiated into endothelial cells. Also disclosed are screening assays for identification of candidate substances that affect differentiation of pluripotent stem cells into progenitor cells.
Owner:FUJIFILM CELLULAR DYNAMICS INC

METHOD FOR PREPARATION OF PLATELET FROM iPS CELL

ActiveUS20110053267A1Avoid generationEfficiently obtainMammal material medical ingredientsSkeletal/connective tissue cellsHematopoietic progenitor cell differentiationMolecular biology
It is an object of the present invention to provide a method for efficiently preparing blood cells, such as mature megakaryocytes and platelets, from iPS cells in an in vitro culture system.The present invention provides a sac-like structure enclosing hematopoietic progenitor cells, which is obtained by inoculating iPS cells onto feeder cells and then culturing the iPS cells under conditions suitable for inducing the differentiation of hematopoietic progenitor cells. Moreover, the present invention also provides a method for producing various types of blood cells, which comprises culturing hematopoietic progenitor cells enclosed in the sac-like structure under conditions suitable for inducing the differentiation of blood cells. Furthermore, the present invention also provides a method for producing various types of blood cells, particularly megakaryocytes and platelets, without involving the sac-like structure.
Owner:THE UNIV OF TOKYO

Construction of megakaryocyte model and cell bank of megakaryocyte by virtue of SV40 gene recombination

The invention relates to construction of an SV40LT gene-mediated megakaryocyte model and a cell bank of megakaryocyte, belonging to the field of medical research. The construction is mainly characterized in that an SV40LTag-pcDNA3.1 (-) recombinant is constructed from T4DNA ligase, BamHI, pcDNA3.1 (-) DNA and SV40LTag DNA by virtue of conventional means; the recombinant is purified by virtue of competent escherichia coli; the recombinant is introduced into megakaryocyte cultured in vitro through a lipofection transfection method, so that the recombinant is integrated with the DNA of the cell; a cell screened by virtue of G418 and containing a positive recombinant is subjected to subculture and enlarged cultivation; a cell which is consistent with the biological properties of an immortalized cell in cellular morphology, cell growth curve, karyotype, nude mice carcinogenicity test, detection of SV40 large T gene in transfection cell DNA, determination of an mRNA expression product and a DNA sequence determination result is screened out as a megakaryocyte model, and is cryopreserved in liquid nitrogen, so as to construct an SV40LT gene-mediated megakaryocyte model and the cell bank of megakaryocyte; therefore, a method for long-term in vitro subculture of the megakaryocyte is established, and the method is applicable to the in vitro research of development, function and pathogenic mechanism of the megakaryocyte.
Owner:翁炳焕
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