ERK5信号通路介导下的流体剪切力对成骨细胞增殖作用的实验研究
发布时间:2018-07-27 17:22
【摘要】:[目的]本实验主要探讨流体剪切力与ERK5信号通路在成骨细胞增殖反应中的作用关系,为确立骨组织中的机械应力传导机制提供依据。 [方法]通过对体外培养的成骨细胞施加相同强度不同时间的流体剪切力,结合EKR5阻断剂,应用MTT和免疫荧光标记的方法检测成骨细胞的增殖活性,分析ERK5信号通路介导的流体剪切力对成骨细胞的增殖的影响。 [结果]在相同强度(12dyn/cm2)、不同时间的流体剪切力作用下,比较静置对照组,短时间内的流体剪切力(t≤1h)促进成骨细胞增殖的作用明显(P0.05),细胞生长曲线前移,CylinD1与CDK4表达量显著增高(P0.05);但在1.5h、2h却明显表现出抑制增殖的作用(P0.05);而相同时间FSS作用下,利用ERK5阻断剂BIX02188阻断ERK5信号通路后,成骨细胞的增殖反应受到抑制CylinD1与CDK4的表达量随之降低,与对照组比较表现出显著差异(P0.05),且CylinD1与CDK4的表达呈正相关关系(r=0.55,P0.05)。 [结论]正常生理环境中,ERK5信号通路存在且参与成骨细胞的正常增殖活动。12dyne/cm2的FSS刺激可以通过ERK5-CylinD1-CDK4信号传导通路起到调节成骨细胞增殖活动的作用,短时间(t≤60min)持续FSS刺激可通过ERK5-CylinD1-CDK4信号传导通路正性调节细胞周期,促进成骨细胞增殖;而长时间(t60min)FSS刺激则会抑制ERK5的磷酸化,通过ERK5-CylinD1-CDK4信号传导通路调控细胞周期调控因子起到抑制细胞增殖的作用。
[Abstract]:[objective] to investigate the relationship between fluid shear stress and ERK5 signaling pathway in osteoblast proliferation, and to provide a basis for establishing the mechanism of mechanical stress conduction in bone tissue. [methods] the proliferation activity of osteoblasts was detected by MTT and immunofluorescence labeling by applying fluid shear force of the same strength and different time to the osteoblasts cultured in vitro, combined with EKR5 blocker. To investigate the effect of fluid shear stress mediated by ERK5 signaling pathway on the proliferation of osteoblasts. [results] under the same strength (12dyn/cm2) and different time of fluid shear stress, the static control group was compared. The effect of fluid shear stress (t 鈮,
本文编号:2148589
[Abstract]:[objective] to investigate the relationship between fluid shear stress and ERK5 signaling pathway in osteoblast proliferation, and to provide a basis for establishing the mechanism of mechanical stress conduction in bone tissue. [methods] the proliferation activity of osteoblasts was detected by MTT and immunofluorescence labeling by applying fluid shear force of the same strength and different time to the osteoblasts cultured in vitro, combined with EKR5 blocker. To investigate the effect of fluid shear stress mediated by ERK5 signaling pathway on the proliferation of osteoblasts. [results] under the same strength (12dyn/cm2) and different time of fluid shear stress, the static control group was compared. The effect of fluid shear stress (t 鈮,
本文编号:2148589
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