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- 2018
重组人骨形态发生蛋白-9对人牙周膜成纤维细胞成骨分化的影响
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Abstract:
摘要 目的:研究重组人骨形态发生蛋白-9(recombinant human bone morphogenetic protein-9, rhBMP-9)对体外人牙周膜成纤维细胞成骨细胞分化的影响。方法:体外培养人牙周膜成纤维细胞,成骨分化培养基(osteogenic differentiation medium,ODM)诱导成骨分化,加入不同浓度rhBMP-9或p38和胞外信号调节激酶1/2(extracellular signalregulated kinase1/2,ERK1/2)抑制剂SB203580和U0126处理。采用LabAssayTM碱性磷酸酶(alkaline phosphatase,ALP)检测试剂盒检测ALP活性。提取总RNA,实时荧光定量聚合酶链反应(Real time fluorescence quantitative PCR,qPCR)检测RUNT相关转录因子2(Runt-related transcription factor 2,RUNX2)、分化抑制因子1(inhibitor of differentiation factor 1,ID1)、骨唾液酸蛋白(bone sialoprotein,BSP)和骨桥蛋白(osteopontin,OPN)表达情况。结果:rhBMP-9可以显著增加人牙周膜成纤维细胞ALP活性,且呈浓度和时间依赖性。成骨分化相关转录因子RUNX2和ID1以及晚期成骨标志物BSP和OPN的表达在rhBMP-9的刺激下也显著升高。与rhBMP-9单独刺激组比较,加入SB203580和U0126共刺激后可完全抑制rhBMP-9促人牙周膜成纤维细胞成骨分化的作用。结论:rhBMP-9能够显著诱导人牙周膜成纤维细胞向成骨细胞样细胞分化,且其可能机制为调节p38和ERK1/2通路
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