J Mater Sci Mater Med:氧化锆刺激ECM重塑作为前成骨细胞粘附/增殖的先决条件,可能干扰细胞锚固

2019-03-16 不详 网络

目前对氧化锆(ZrO2)的生物反应尚不完全清楚,本研究中,我们以直接和间接的方式探究其对前成骨细胞的影响。结果表明,氧化锆主要通过控制存活信号触发重要的细胞内信号传导,通过调节负责动态细胞骨架重排的信号级联,导致细胞粘附和增殖,如通过荧光显微镜观察到的。Focal 粘附酶(FAK)和Rac1的磷酸化因富含ZrO2的培养基而降低,与结晶紫测定的结果一致,即富含ZrO2的培养基,前成骨细胞粘附明显降低

目前对氧化锆(ZrO2)的生物反应尚不完全清楚,本研究中,我们以直接和间接的方式探究其对前成骨细胞的影响。

结果表明,氧化锆主要通过控制存活信号触发重要的细胞内信号传导,通过调节负责动态细胞骨架重排的信号级联,导致细胞粘附和增殖,如通过荧光显微镜观察到的。Focal 粘附酶(FAK)和Rac1的磷酸化因富含ZrO2的培养基而降低,与结晶紫测定的结果一致,即富含ZrO2的培养基,前成骨细胞粘附明显降低。然而,我们认为这种前成骨细胞粘附的减少需要控制与细胞周期进程有关的细胞内通路的细胞内存在,因为我们发现了丝裂原活化蛋白激酶(MAPK)-p38和细胞周期蛋白依赖性激酶2(CDK2)的磷酸化显著上调,而p15(细胞周期抑制因子)磷酸化降低。重要的是,蛋白磷酸酶2A(PP2A)活性降低,保证了MAPK-p38对富含ZrO2的培养基磷酸化上调。补充地,对氧化锆有基质金属蛋白酶(MMPs)的调节,并且这种重塑可能通过干扰细胞锚定来影响细胞表型。

总而言之,该研究结果显示了信号分子的库存,这表明ECM重塑作为前成骨细胞表型的先决条件,通过影响它们对氧化锆响应的锚定。

原始出处:

da Costa Fernandes CJ, Ferreira MR, et al., Zirconia stimulates ECM-remodeling as a prerequisite to pre-osteoblast adhesion/proliferation by possible interference with cellular anchorage. J Mater Sci Mater Med. 2018 Mar 26;29(4):41. doi: 10.1007/s10856-018-6041-9.

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