| Project/Area Number |
13670683
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Neurology
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| Research Institution | National Center of Neurology and Psychiatry |
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Principal Investigator |
KIKUCHI Aiko National Center of Neurology and Psychiatry (NCNP), National Institute of Neuroscience, Dept. of Ultrastructural Res., Section Chief, 神経研究所・微細構造研究部, 室長 (70159010)
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| Co-Investigator(Kenkyū-buntansha) |
KAMO Isao National Center of Neurology and Psychiatry (NCNP), National Institute of Neuroscience, Dept. of Ultrastructural Res., Section Chief, 神経研究所・微細構造研究部, 室長 (70108489)
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| Project Period (FY) |
2000 – 2003
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| Project Status |
Completed (Fiscal Year 2003)
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| Budget Amount *help |
¥4,100,000 (Direct Cost: ¥4,100,000)
Fiscal Year 2003: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 2002: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 2001: ¥2,100,000 (Direct Cost: ¥2,100,000)
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| Keywords | microglia / neuron / astrocytee / thymic myoid cell / monocyte / 脳 / 胸腺 / 筋様細胞 / 胸腺筋様細胞 / 細胞増殖 / 細胞分化 / 神経 |
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| Research Abstract |
Thymic myoid cells were found in many vertebrates. In particular, in human these cells are suggested to relate to autoimmune disease myasthenia gravis. We thought that these cells might have important roles in physiology. We succeeded in cloning myoid cells from the rat thymus. Indeed, these cells produce many cytokines, including an 80-kDa and 100-kDa haemopoietic factors. Both of them preferentially induce monocytic lineage cells. Using specific antibodies against these factors, we found that many myoid cells are increased in number and are producing these factors in the hyperplastic thymus associated with myasthenia gravis. Furthermore, we detected that these factors play important roles in specific proliferation of B-cells that recognized myoid cell s-own AChR. Brain also uses cytokines. Some of them are common to those used in the immune system. Expectedly, brain cells including neurons and glial cells produce the two factors. The purified two factors stimulate the growth and differentiation of microglial cells, suggesting that the new factors play important roles in diversification of monocytic lineage cells, together with macrophage colony stimulating factor and granulocyte-macrophage colony stimulating factor. Furthermore, these factors also stimulated MAPK of neurons, suggesting that they play important roles in neuron survival. We also succeeded in producing recombinant 80-kDa and 100-kDa factors.
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