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- 2018
C4orf7在牙周膜细胞成骨分化中的作用及机制
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Abstract:
摘要 目的:探讨C4orf7在牙周膜细胞成骨分化中的作用及机制。方法:首先采用免疫组织化学法(IHC)检测C4orf7在几种牙周组织内的表达情况。人牙周膜细胞(PDLCs)体外培养,利用慢病毒载体技术,构建C4orf7过表达细胞(LV-c4orf7)及空载体对照细胞(LV-con)。对两组细胞矿化诱导4 d、7 d、18 d,检测成骨指标碱性磷酸酶(ALP)、Ⅰ型胶原(COL1)、Runt相关转录因子2(RUNX2)及骨钙素(OCN)的表达变化,ALP活性及矿化结节形成情况;最后,利用免疫共沉淀技术检测C4orf7与骨形成蛋白2(BMP2),Ⅰ型胶原(COLⅠ),Ⅲ型胶原(COLⅢ)蛋白间的互作情况。结果:IHC结果显示,C4orf7仅在牙周韧带部位明显表达。成骨诱导后,与对照组相比,过表达组细胞的ALP活性及矿化结节形成明显减弱,成骨指标ALP,COL1,RUNX2,OCN的表达也均受到抑制(P<0.05)。免疫共沉淀表明,C4orf7可与BMP2分子结合,但与COLⅠ和COLⅢ无作用。结论:C4orf7负向调控PDLCs的成骨分化,并可能通过抑制BMP2功能来实现
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