A study of bone atrophy treatment by detection of factors in osteocytes involved in mechanical stress

• Project/Area Number: 23659717
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Orthopaedic surgery
• Research Institution: Kyoto University
• Principal Investigator: AKIYAMA Haruhiko 京都大学, 医学研究科, 准教授 (60402830)
• Project Period (FY): 2011 – 2012
• Project Status: Completed (Fiscal Year 2012)
• Budget Amount: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000); Fiscal Year 2012: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000); Fiscal Year 2011: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
• Keywords: 骨細胞 / メカノセンサー / イオンチャネル / 廃用性骨萎縮 / 遺伝子改変マウス / マイクロアレイ

Research Abstract

Genome-wide screening using osteocytes in disused bone showed upregulation of BK channel genes. RT-PCR revealed that osteocytes express KCNMB1, 2 and 4 subunit genes. CaK-GFP transgenic mice were generated, and then Col1a1-mRFP1; CaK-GFP double hemi-transgenic mice were produced. We are trying live imaging of osteoblasts and osteclasts in these mice using confocal microscope when BK channel opener or blocker reagents are administered.