The effect and significance of inhibitting ERKon PCAF in breast cancercell MCF-7
- VernacularTitle:ERK抑制对乳腺癌细胞(MCF-7)PCAF的影响和意义
- Author:
Suhua LI
- Publication Type:Journal Article
- Keywords:
17?-estradiol;
PD98059;
ERK;
Wild-type p53;
PCAF;
Breast cancer line MCF-7
- From:
Journal of Chongqing Medical University
2007;0(08):-
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To explore the mechanisms of ERK in affecting estrogen receptor signaling pathway by investigating the changes of the expression levels of nuclear receptor co-activatorPCAF protein and wild-type P53 protein and their gene transcription in the process of estrogen promoting transformation of cell cycle and resisting apoptosis of breast cancer cell MCF-7 after inhibitting ERK. Methods:Estrogen receptor-positive breast cancer cells MCF-7 were divided into 17?-estradiol treatment group,17 ?-E2 + ERK inhibitor PD98059 treatment group,and the control group. The apoptosis of cell and cycle were analyzed by flow cytometry. The expression of phosphorylated ERK1/2 and PCAF protein and wild-type p53 were detected by Western blot.The expression of pcaf mRNA and wild-type p53 mRNA were detected by RT-PCR. Results:With phosphorylation inhibitor of ERK PD98059,the effect of 17?-estradiol in resisting apoptosis and prmoting transformation of MCF-7 cell cycle was reversed,and the rate of early apoptosis of MCF-7 cell was raised(P0.05).The protein expression level and gene transcription of wild-type P53 were reinforced (P
