摘要
目的:探讨14-3-3tau蛋白对滋养细胞侵袭功能的影响及可能机制。方法:免疫组化法检测人早孕期绒毛、蜕膜以及人绒癌滋养细胞株BeWo中14-3-3tau的表达。RNA干扰方法下调BeWo细胞14-3-3tau的表达,RT-PCR和Western blotting方法检测E钙黏附素及转录因子snail的表达变化,Transwell小室方法检测侵袭细胞数目的变化。用U0126特异性阻断胞外信号调节蛋白激酶1/2(ERK1/2)信号通路,观察下调14-3-3tau对BeWo细胞侵袭能力的变化。结果:(1)14-3-3tau在早孕期绒毛外细胞滋养细胞和侵袭入蜕膜组织的游离型滋养细胞以及BeWo细胞中均有表达。(2)下调BeWo细胞14-3-3tau表达后,E钙黏附素表达下降,Snail表达增加,穿过Transwell小室的细胞数增加(P<0.05)。(3)U0126阻断14-3-3tau下调引起的BeWo细胞侵袭增加(P<0.05)。结论:14-3-3tau通过ERK1/2信号通路抑制滋养细胞的侵袭能力。
AIM： To investigate the potential role of 14-3-3 tau in trophoblast cells on invasiveness. METHODS： 14-3-3 tau expression was detected in first-trimester villi, deciduas and human trophoblastic cell line （BeWo） by immunohistochemistry. Small interference RNA （siRNA） targeting 14-3-3 tau was transfected into BeWo cells. The effects of down-regulated 14-3-3 tau on invasion of human trophoblasts cell line BeWo were examined by matrigel invasion assay, and the transcription, translation of E-cadherin and snail were estimated by RT-PCR or Western blotting. U0126 was used to detect the extracellular-signal related kinase 1/2 （ERK1/2） function on down-regulation of 14-3-3 tau induced cell invasion. RESULTS： 14-3-3 tau was detected in the invasive trophoblastic cells in the first trimester villi and that invaded to the deciduas. BeWo cells also expressed 14-3-3 tau. Down-regulation of 14-3-3 tau increased the invasive cell-number of BeWo, as well as the expression of snail, and inhibited E-cadherin. U0126 inhibited the enhanced invasiveness in these cells induced by the down-regulation of 14-3-3 tau. CONCLUSION： 14-3-3 tau may regulate the invasiveness of human trophoblastic cells through ERK1/2 signaling pathway.
出处
《中国病理生理杂志》
CAS
CSCD
北大核心
2010年第3期563-567,共5页
Chinese Journal of Pathophysiology
基金
国家青年科学基金资助项目(No.30600657)
国家自然科学基金资助项目(No.30872777)
高等学校博士学科点专项科研基金资助项目(No.20070246021)
复旦大学青年基金资助项目(No.EYF157003)
