2013 Fiscal Year Final Research Report
Inhibition of Spry2 Induces Proliferation and Differentiation of Osteoblasts through bFGF and EGF Stimulation but Inhibits Proliferation of Gingival Epithelial Cells.
| Project/Area Number |
24792334
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Periodontal dentistry
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| Research Institution | Kyushu University |
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Principal Investigator |
SANUI Terukazu 九州大学, 歯学研究科(研究院), 助教 (70507780)
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| Project Period (FY) |
2012-04-01 – 2014-03-31
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| Keywords | Spry2 / 歯周組織再生 / ｂFGF / EGF |
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| Research Abstract |
Transduction of a dominant-negative mutant of Spry2 (Y55A-Spry2) enhanced basic fibroblast growth factor (bFGF)- and epidermal growth factor (EGF)-induced ERK activation in MC3T3-E1 osteoblastic cells. In contrast, it decreased their activation in GE1 cells. Consistent with these observations, Y55A-Spry2 increased osteoblast proliferation with bFGF and EGF stimulation, whereas the proliferation of Y55A-Spry2-introduced GE1 cells was decreased via the ubiquitination and degradation of EGF receptors (EGFRs). In addition, Y55A-Spry2 caused upregulation of Runx2 expression and downregulation of Twist, a negative regulator of Runx2, with treatment of bFGF and EGF, resulting in enhanced osteoblastogenesis accompanied by alkaline phosphatase activation and osteocalcin expression in MC3T3-E1 cells.
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