Budget Amount *help |
¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
Fiscal Year 2013: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2012: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2011: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
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Research Abstract |
Cell adhesion mediated-drug resistance (CAM-DR) is a major obstacle in achieving cure in patients with hematologic malignancies including multiple myeloma (MM). We found that di or trimethylation was moderately induced in histone H3 lysine 4 (K4) and K36, and markedly in K9 and K27 by anti-MM drug treatment without adhesion to stromal cells. In contrast, trimethylation to K27 (H3K27me3) was absent in cell adhesion mediated-drug resistant MM cells. Inhibition of H3K27me3 significantly inhibited anti-MM drug-induced apoptosis in stroma free condition. These results suggest that cell adhesion-induced H3K27me3 inhibition is a critical step in drug resistance of MM cells.
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