Immortalized mesenchymal cells and utilization thereof
First Claim
1. An immortalized mesenchymal system-related cell, which is a mesenchymal system-related cell that is selected from mesenchymal stem cells, mesenchymal precursor cells, mesenchymal cells and cells derived from mesenchymal cells, and is immortalized by high expression or activation of an immortalizing gene.
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Abstract
The method developed herein is for expanding cord blood-derived hematopoietic stem cells to a degree that is sufficiently safe for clinical application, such as the transplantation of hematopoietic stem cells into adult patients. Further, to prepare a number of mesenchymal stem cells or mesenchymal cells that have conventionally been available only in an extremely small number, an immortalizing gene such as that of telomerase is introduced alone into mesenchymal stem cells, mesenchymal cells or the like, so as to induce the differentiation of the expanded mesenchymal stem cells.
12 Citations
60 Claims
- 1. An immortalized mesenchymal system-related cell, which is a mesenchymal system-related cell that is selected from mesenchymal stem cells, mesenchymal precursor cells, mesenchymal cells and cells derived from mesenchymal cells, and is immortalized by high expression or activation of an immortalizing gene.
- 31. A method for immortalizing and proliferating mesenchymal system-related cells, which comprises causing high expression of or activating an immortalizing gene in a mesenchymal system-related cell that is selected from mesenchymal precursor cells, mesenchymal stem cells, mesenchymal cells and cells derived from mesenchymal cells.
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37. A method for producing artificial bone marrow, which comprises culturing immortalized and expanded bone marrow stromal cells together with hematopoietic stem cells.
- 38. A bone morrow stromal cell that is immortalized by high expression or activation of an immortalizing gene selected from any one of a telomerase gene, a gene derived from telomerase, and a gene regulating the expression or activity of telomerase.
- 49. A method for immortalizing and proliferating bone marrow stromal cell, which comprises causing high expression of or activating an immortalizing gene in a bone marrow stromal cell.
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54. A method for producing artificial bone marrow, which comprises culturing immortalized and expanded bone marrow stromal cells together with hematopoietic stem cells.
Specification