| Budget Amount *help |
¥17,290,000 (Direct Cost: ¥13,300,000、Indirect Cost: ¥3,990,000)
Fiscal Year 2017: ¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2016: ¥5,850,000 (Direct Cost: ¥4,500,000、Indirect Cost: ¥1,350,000)
Fiscal Year 2015: ¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
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| Outline of Final Research Achievements |
We studied the functions of class II phosphoinositide 3-kinase (PI3K) isoforms and their functional difference, by analyzing PI3K-C2α- and PI3K-C2β-knockout (KO) mice. Single KO mice of either gene apparently exhibited normal phenotypes whereas the PI3K-C2α/ PI3K-C2β double KO mice showed abnormalities in two different tissues. We also generated KO mice of the degrading enzyme, PI3Pase, of the class II PI3K product PI-3-P. Tissue-specific homozygous KO mice of PI3Pase showed the similar phenotypes to global KO mice, and the analyses of PI3Pase-deficient cells demonstrated abnormalities in membrane traffic. Homozygous KO mice of sphingolipid metabolizing enzyme, sphingosine kinase, showed exacerbation of vascular lesions. This was mediated by impaired membrane traffic.
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