Expression correlation between Efp and Plk3 in estrogen receptor-positive breast cancer
10.19401/j.cnki.1007-3639.2016.10.007
- VernacularTitle:ER阳性乳腺癌中Efp和Plk3蛋白表达相关性探讨
- Author:
Jiajun DUAN
;
Tianyu ZOU
;
Ji ZHANG
;
Dequan LIU
- Publication Type:Journal Article
- Keywords:
Breast cancer;
Estrogen receptor;
Estrogen-responsive finger protein;
Polo-like kinase 3;
Drug resistance
- From:
China Oncology
2016;26(10):848-853
- CountryChina
- Language:Chinese
-
Abstract:
Background and purpose:Estrogen receptor (ER)-positive breast cancer always presents a dilemma for resistance to endocrine therapy in a long time. The recent studies showed that the expression of estrogen-responsive ifnger protein (Efp) and polo-like kinase 3 (Plk3) had a close relationship with breast cancer development. This study was to explore the expression correlation between Efp and Plk3 in ER-positive breast cancer in order to understand the inlfuence of Efp and Plk3 on the drug resistance.Methods:The expression of Efp and Plk3 in 74 cases of ER-positive breast cancer was detected by SP immunohistochemistry. The clinical signiifcance was then analyzed. Real-time lfuorescent quantitative polymerase chain reaction (RTFQ-PCR) and Western blot were used to detect the expression of Efp and Plk3 in ER-positive MCF-7 cells.Results:No signiifcant relationship was found between Efp and Plk3 expression and the clinicopathological features of 74 cases of ER-positive breast cancer (P>0.05). The number of cases whose Efp showed positive expression was 51 (68.9%), while the number of cases whose Plk3 showed positive expression was 23 (31.1%). Chi-square test analysis showed the expression of Efp and Plk3 was negatively correlated in 74 cases of ER-positive breast cancer (χ2=8.837,P<0.05). The result of RTFQ-PCR showed that the expression of Efp mRNA in MCF-7 cells was up-regulated by estrogen stimulation, whereas Plk3 mRNA was not changed. The result of Western blot showed that the expression of Efp protein in MCF-7 cells was increased by estrogen and MG132 stimulation, whereas Plk3 protein was decreased.Conclusion:The expression of the Efp protein is negatively correlated with Plk3 protein in ER-positive breast cancer. High expression of Efp may be involved in the resistance to endocrine therapy.
