Journal of International Obstetrics and Gynecology ›› 2014, Vol. 41 ›› Issue (6): 658-662.

• 论著 • Previous Articles     Next Articles

The Effect of HPV16 E6 on ER Stress-Autophagic Response in the Cervical Cancer

WANG Yu-juan,HUO Jun-ling,LI Jing,WANG Zan-hong   

  1. Shanxi Medical University, Taiyuan 030001, China(WANG Yu-juan, HUO Jun-ling, LI Jing);Department of Obstetrics and Gynecology, Shanxi Academy of Medical Sciences,Shanxi Da Yi Hospital , Taiyuan 030032, China(WANG Zan-hong)
  • Received:1900-01-01 Revised:1900-01-01 Published:2014-12-15 Online:2014-12-15
  • Contact: WANG Zan-hong

Abstract: Objective:To investigate the effects of HPV16 E6 on endoplasmic reticulum(ER) stress-autophagic response in the cervical cancer C33A cells. Methods:The eukaryotic expression vector of HPV16 E6 was constructed and transfected via lipofectamine into C33A cells. Experimental cells was classified into 3 groups: pcDNA3.1(-)-HPV16 E6 group,pcDNA3.1(-) group and C33A group. Fluorescent quantitation-ploymerase chain reaction was used for detecting expression of mRNA of HPV16 E6, and Western blot was explored to measure expression of protein of HPV16 E6,Beclin 1,LC3Ⅱ and GRP78 in transfected cells. Flow cytometry(FCM) was employed to observe the effect of transfection on the autophagic of C33A, and proliferation was analyzed by MTT assay. Results:Eukaryotic expression vector pcDNA3.1(-)-HPV16 E6 was constructed successfully. The eukaryotic expression vector pcDNA3.1(-)-HPV16 E6 significantly improved the expression of mRNA and protein of HPV16 E6 in C33A cells. The cell proliferations of HeLa cells increased, and FCM investigation showed the autophagic rate of pcDNA3.1(-)-HPV16 E6 group was higher than that in pcDNA3.1(-) group and C33A group (P<0.05). The expression of Beclin 1, LC3Ⅱ and GRP78 were significantly improved after transfection with vector pcDNA3.1(+)-HPV16 E6(P<0.05). Furthermore, GRP78 protein level was reduced and the autophagic rate was decreased by treatment with ER stress inhibitor. Conclusions:ER stress-autophagic response plays an important role in the process of HPV16 E6 inducing cervical cancer. So it might be one of the new strategies for gene therapy of cervical carcinoma.

Key words: Uterine cervical neoplasms, Human papillomavirus 16, Endoplasmic reticulum, Stress, Autophagy