| Project/Area Number |
26450383
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Animal production science
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| Research Institution | Rakuno Gakuen University |
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Principal Investigator |
Amano Tomoko 酪農学園大学, 農食環境学群, 准教授 (60388585)
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| Research Collaborator |
Albrecht Urs University of Fribourg, Department of Medicine, Division of Biochemistry, 教授
Ripperger Juergen University of Fribourg, Department of Medicine, Division of Biochemistry, 研究員
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| Project Period (FY) |
2014-04-01 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2016: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2015: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2014: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
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| Keywords | 生物時計 / 胚盤胞期胚 / 時計遺伝子 / Clock / 概日時計 / マウス / 着床 / 初期胚 |
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| Outline of Final Research Achievements |
Clock gene (Clock) is involved in expression of many genes to control events occurring at particular timing in a day. Since there are many events that occur timely in mammalian reproduction processes, it is likely that circadian genes including Clock are involved in reproduction physiologies. In our study, we found a decrease in the number of pups and abnormal spacing (abnormality of length between implantation sites in the uterus) when one or both parents bore a Clock homozygote mutation. The pup number and implantation sites were decreased more when the spacing abnormality was greater, suggesting spacing abnormality affected the implantation process. We also revealed that not only Clock mutation of the mother but also that of embryos affected the spacing abnormality. We are now searching for implantation-promoting genes regulated by Clock among genes expressed in blastocysts such as Cox2, known as a gene activating implantation ability of blastocysts.
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