| Project/Area Number |
26462817
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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 |
Functional basic dentistry
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| Research Institution | Kagoshima University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
大西 智和 鹿児島大学, 医歯学域歯学系, 准教授 (30244247)
柿元 協子 鹿児島大学, 医歯学域歯学系, 助教 (40274849)
坂東 健二郎 明海大学, 歯学部, 講師 (50347093)
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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 |
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2016: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2015: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2014: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
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| Keywords | 骨代謝 / 骨芽細胞 / 細胞内シグナル伝達 / 細胞分化 / ＪＮＫ / オステオポンチン / オステオカルシン / 幹細胞 / 口腔生化学 / 軟骨細胞 / サイトカイン / ケモカイン / メカニカルストレス |
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| Outline of Final Research Achievements |
Osteopontin (OPN) is osteogenic marker protein which have regulatory effects on inflammatory diseases and bone metabolic disorders. Inhibition of JNK significantly inhibited osteogenic differentiation characterized by matrix mineralization and the gene expression of osteocalcin (OCN), whereas it increased OPN expression, indicating two types of osteogenic differentiation: OCN secretion type and OPN secretion type. The appearance of OPN type was decreased in DUSP16, a JNK specific phosphatase, knockout mouse. Gene expression analysis using DNA microarray revealed that OPN type osteoblasts specifically express secretory proteins and some surface markers. Moreover, inhibitor of differentiation 4 (Id4) suppressed the inhibitory effect of Hey1 on OPN promoter activity and regulated the induction of OPN type osteoblasts. Our findings suggested that JNK signaling regulates multifunctional differentiation of OPN and OCN type osteoblasts.
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