| Project/Area Number |
06670232
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Research Field |
Experimental pathology
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| Research Institution | Nagasaki Unversity School of Medicine |
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Principal Investigator |
FURUKAWA Koichi (1995) Nagasaki University School of Medicine Associate Professor, 医学部, 助手 (80211530)
山本 朗仁 (1994) 長崎大学, 医学部, 助手 (50244083)
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| Co-Investigator(Kenkyū-buntansha) |
古川 鋼一 長崎大学, 医学部, 助教授 (80211530)
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| Project Period (FY) |
1994 – 1995
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| Project Status |
Completed (Fiscal Year 1995)
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| Budget Amount *help |
¥2,200,000 (Direct Cost: ¥2,200,000)
Fiscal Year 1995: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 1994: ¥1,500,000 (Direct Cost: ¥1,500,000)
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| Keywords | Glycosyltransferase / Ganglioside / In situ hybridization / development / brain / 糖鎖遺伝子 / ニューロン / 遺伝子発現 / 神経細胞 / 分化 / 修復 / 糖転移酵素遺伝子 / in situ hybridigation / カイニン酸 / 脳虚血 |
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| Research Abstract |
Gangliosides are synthesized by sequential catalytic reaction of multiple glycosyltransferases. GM2/GD2 synthase and GD3 synthase are key enzymes for ganglioside synthesis, because their relative activities regulate the main profiles of ganglioside expression. Mouse GD3 synthase (EC2.4.99.8) cDNA was cloned by eukaryotic expression cloning, and its mRNA expression as well as that of GM2/GD2 synthase gene during the development of the mouse CNS was analyzed by using northern blotting, reverse transcription-polymerase chain reaction, and in situ hybridization. When brain tissue was analyzed as a whole mass, a typical pattern corresponding to the reported findings obtained by biochemical analyzes was observed, i.e., high expression of GD3 synthase gene in the early stage and gradual increase of GM2/GD2 synthase gene expression in the late stage of the development. However, the results of in situ hybridization of these two genes revealed that the expression kinetics of these two genes were heterogeneous among various sites in the brain under development. These findings suggest that various expression patterns of the two genes reflect differences in the course of the development of individual sites, and also different ganglioside components are required in individual portions of the brain for development and maintenance of the function.
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