| Budget Amount *help |
¥18,720,000 (Direct Cost: ¥14,400,000、Indirect Cost: ¥4,320,000)
Fiscal Year 2014: ¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000)
Fiscal Year 2013: ¥6,240,000 (Direct Cost: ¥4,800,000、Indirect Cost: ¥1,440,000)
Fiscal Year 2012: ¥7,020,000 (Direct Cost: ¥5,400,000、Indirect Cost: ¥1,620,000)
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| Outline of Final Research Achievements |
We studied the mechanisms by which sphingosine-1-phosphate receptor S1P2 and phosphatidylinositol 3-kinase (PI3K) class II α-isoform (PI3K-C2α). S1P2 in the vascular endothelium protected the vasculature from acute disruption of vascular barrier integrity induced by anaphylactic mediators and lipopolysaccharide. This effect was mediated by S1P2-mediated inhibition of Akt and eNOS. S1P2 decreased the generation of nitric oxide (NO) by eNOS, resulting in inhibition of NO-mediated disruption of adherens junctions. Genetic deletion of PI3K-C2α impaired developmental and pathological angiogenesis. PI3K-C2α was necessary for VE-cadherin transport to the cell-cell junction, VEGF receptor endocytosis and endosomal receptor signaling, through which PI3K-C2α served an essential role in angiogenesis.
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