2011 Fiscal Year Final Research Report
Role of transient receptor potential(TRP) of Ca^<2+>-permeable cation channels in osteoclast apoptosis
| Project/Area Number |
21592380
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Functional basic dentistry
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| Research Institution | Fukuoka Dental College |
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Principal Investigator |
OKAMOTO Fujio 福岡歯科大学, 歯学部, 講師 (60153938)
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| Co-Investigator(Kenkyū-buntansha) |
KAJIYA Hiroshi 福岡歯科大学, 歯学部, 講師 (80177378)
OKABE Koji 福岡歯科大学, 歯学部, 教授 (80224046)
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| Project Period (FY) |
2009 – 2011
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| Keywords | 破骨細胞 / TRPM7チャネル / 陽イオン輸送 / アポトーシス |
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| Research Abstract |
Osteoclasts express TRPM7, a Ca^<2+-> and Mg^<2+-> permeable cation channel. However, the functional role of TRPM7 in osteoclasts is unknown. We examined the properties of cation transport through TRPM7 in mature osteoclasts and further investigated the contribution of TRPM7 to osteoclast apoptosis. Although cation transport via TRPM7 was inactive in the presence of physiological concentration of Mg^<2+>, extracellular acidification abrogated the Mg^<2+-> dependent blockade. Osteoclasts extrude H+and Cl-and form an acidic compartment to dissolve inorganic component of bone matrix. Abrogation of Mg^<2+-> dependent block of cation transport at acidic extracellular milieu is convenient for uptake of Ca^<2+> and Mg^<2+> eluted from bone during bone resorption. Our evidence also showed that TRPM7 was less likely to participate in osteoclast apoptosis.
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Research Products
(8 results)
