| Project/Area Number |
10660288
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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 |
Basic veterinary science/Basic zootechnical science
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| Research Institution | Osaka Prefecture University |
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Principal Investigator |
OKADA Toshiya Graduate School of Agriculture and Biological Science, Osaka Prefecture University Assistant Professor, 農学生命科学研究科, 講師 (00169111)
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| Co-Investigator(Kenkyū-buntansha) |
MUKAMOTO Masafumi Graduate School of Agriculture and Biological Science, Osaka Prefecture University Assistant Professor, 農学生命科学研究科, 講師 (80231629)
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| Project Period (FY) |
1998 – 2000
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| Project Status |
Completed (Fiscal Year 2000)
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| Budget Amount *help |
¥3,400,000 (Direct Cost: ¥3,400,000)
Fiscal Year 2000: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1999: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 1998: ¥2,100,000 (Direct Cost: ¥2,100,000)
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| Keywords | maternal nephrectomy / fetal kidney / cell proliferation / apoptosis / growth factor / oncogene / tumor suppressor gene / apoptosis suppressor gene / p53 / WT1 / EGFR / 胎児腎臓 / insulin like growth factor1 / epidermal growth factor receptor / proliferating cell nuclear antigen / epidermal growth factor / vascular endothelial cell growth factor |
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| Research Abstract |
The present study designed to clarify the development of fetal kidney when maternal kidney become dysfunctional. During perinatal period, intense cell proliferation and apoptosis were present in the kidney. The number of proliferating cells was decreased with age at this period. Percentage of apoptotic cells in fetal kidney was significantly increased from fetal day 18 through 20 and decreased thereafter. Maternal uninephrectomy induced lowered proliferative activity of mature glomerulus, increased immunoreactivity of vascular endothelial growth factor (VEGF) of immature glomerulus and increased immunoreactivities of epidermal growth factor (EGF) and EGF receptor in proximal tubules in fetal kidney. Further, maternal uninephrectomy induced increased number of apoptotic cells of collecting ducts and decreased expressions of c-fos, bcl-2, p53 and WT 1 mRNA.These results indicate that the development of fetal kidney is accelerated by maternal uninephrectomy, that the lowered proliferative activity of mature glomerulus is due to the enhanced expression of VEGF in immature glomerulus and decreased expression of oncogene (c-fos), and that the increase of apoptosis in collecting ducts is due not to elevated expression of tumor suppressor gene but to decreased expression of apoptosis suppressor gene.
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