过表达ER恢复雌激素对子宫内膜癌KLE细胞中Notch信号通路的调控

目的:通过观察雌激素对子宫内膜癌KLE细胞中Notch信号通路的影响,探讨过表达雌激素核受体（estrogen receptor,ER）是否可以恢复雌激素对Notch信号通路的调控作用,继而调节细胞增殖活性。方法:MTT检测雌激素及Notch信号通路对细胞增殖活性的影响;RT-PCR及Western-blotting检测雌激素及Notch通路抑制剂DAPT对Notch表达的影响;质粒的抽提及转染使KLE细胞中的雌激素核受体ER过表达。结果:雌激素呈剂量依赖效应促进KLE细胞的增殖活性,其中以雌激素浓度为1.0×10^-9M时最明显（相对于对照组为1.25±0.026,P<0.05）;抑制Notch信号通路的表达可以明显下调KLE细胞的增殖活性（0.76±0.02,P<0.05）;在KLE细胞中,雌激素对Notch的表达没有明显的调控作用,但是将其雌激素核受体过表达后,雌激素可明显上调Notch的表达,并显著促进细胞的增殖活性（1.24±0.02,P<0.05）。结论:在ER阴性的子宫内膜癌细胞中过表达ER,可以恢复雌激素对Notch信号通路的调控,从而进一步的调控细胞增殖活性。

Effect of Extra-expression of Estrogen Receptor in Restoration of Regulation of Estrogen on Notch Signaling Pathway in Endometrial Cancer Cells

Objective:To observe the effect of estrogen on Notch signaling pathway in endometrial cancer cells,and to explore whether estrogen can induce the expression of Notch when estrogen receptor(ER) is up-regulated,further affecting the cell proliferation. Methods:MTT was used to measure the proliferative activity after various treatments.RT-PCR and Western-blotting were used to determine the effect of estrogen and DAPT on Notch expression in mRNA and protein levels.Plasmid was transfected into KLE to induce the ...