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1α,25-二羟维生素D_3对成骨细胞增殖分化和OPG mRNA/RANKL mRNA表达的影响 被引量:7

Impact of 1 alpha, 25-dihydroxy vitamin D_3 on osteoblastic proliferation and differentiation and the expressionof OPG mRNA / RNAKL mRNA.
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摘要 目的研究1α,25-二羟维生素D3[1α,25-(OH)2D3]对体外培育SD大鼠成骨细胞(OB)增殖、分化和细胞核因子κ配体(RANKL)及骨保素(OPG)mRNA表达的影响。方法采用胰蛋白酶和胶原酶消化法从24 h新生SD乳鼠颅盖骨分离得到的OB,经1 nmol/L、10 nmol/L、100 nmol/L的1α,25-(OH)2D3干预24 h、48 h和72 h后,MTT比色法检测OB增殖率;PNPP法测定碱性磷酸酶(ALP)活性;应用RT-PCR法检测细胞中OPG和RANKL的mRNA表达。结果 1 nmol/L组成骨细胞A值在干预24 h、48 h、72 h后,分别为(0.335±0.080)、(0.451±0.086)、(0.545±0.085);100 nmol/L组OB ALP活性分别增加至(6.274±1.561)U/g、(5.021±1.703)U/g、(6.854±1.468)U/g;OPG mRNA表达分别降低至(0.365±0.068)、(0.340±0.046)、(0.381±0.051);RANKL mRNA表达分别增加至(0.622±0.089)、(0.550±0.064)、(0.468±0.062);与0 nmol/L组比较,RANKL/OPG比值分别增加138.53%、153.45%、157.71%,差异均具有统计学意义(P<0.05)。结论高浓度1α,25-(OH)2D3可抑制OB增值和OPG mRNA表达,促进其分化和矿化,上调RANKL/OPG的基因表达,从而促进破骨细胞介导的骨吸收,增强骨更新。 Objective To research the influence of let, 25-(OH)2D3 on osteoblastic proliferation, differentia- tion, the expression of Nuclear factor kappa ligand and osteoprotegerin mRNA in vitro cultured osteoblasts of SD rats
出处 《海南医学》 CAS 2014年第1期5-9,共5页 Hainan Medical Journal
基金 湖北科技厅资助课题(编号:鄂科技2011CDB01804)
关键词 25一二羟维生素D3 成骨细胞 增殖分化 细胞核因子K配体 骨保素 lα, 25-(OH)zD3 Osteoblast Proliferation and differentiation Nuclear factor kappa ligand Osteo-protegerin
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