title: Up-regulation of microRNA-664 inhibits cell growth and increases cisplatin sensitivity in cervical cancer.
abstract: BACKGROUND
  Cervical cancer is one of the leading causes of cancer-related death in woman worldwide. In the present study, we investigated the role of microRNA 664 (miR-664) in regulating cancer migration and chemotherapy sensitivity in cervical cancer.
  
  
  METHODS
  Quantitative real-time PCR (qPCR) was used to assess the mRNA levels of miR-664 in both cervical cancer cell lines and cancer tissues from human patients. Lentiviral vector containing miR-664 mimics (lv-miR-664) was used to upregulate endogenous miR-664 in cervical cancer HeLa cells. The effects of miR-664 up-regulation on cervical cancer cell migration and cisplatin sensitivity were assessed by MTT and Cisplatin assays. Furthermore, the effect of miR-664 up-regulation on E-Cadherin expression was examined by western blot. E-Cadherin was then silenced by siRNA to examine its effect on miR-664 regulation on cervical cancer cell.
  
  
  RESULTS
  MiR-664 was downregulated in both cervical cancer cell lines and cancer tissues in patients. In HeLa cells, lentivirus mediated miR-664 up-regulation reduced cancer cell migration and increased chemosensitivity to cisplatin. Western blot showed E-Cadherin was upregulated upon miR-664 overexpression in HeLa cells. Genetic silencing of E-Cadherin by siRNA reversed the inhibitory effect of miR-664 up-regulation on cervical cancer cell migration.
  
  
  CONCLUSIONS
  Our study demonstrated that miR-664 played an important role in regulating cervical cancer, possibly modulated by E-Cadherin.
authors.affiliation: Department of Gynecology, Qingdao Municipal Hospital 1 Jiaozhou Road, Qingdao 266000, China.
authors.forename: Yao
authors.initials: Y
authors.lastname: Yang
authors.affiliation: Department of Gynecology, Qingdao Municipal Hospital 1 Jiaozhou Road, Qingdao 266000, China.
authors.forename: Hong
authors.initials: H
authors.lastname: Liu
authors.affiliation: Department of Gynecology, Qingdao Municipal Hospital 1 Jiaozhou Road, Qingdao 266000, China.
authors.forename: Xi
authors.initials: X
authors.lastname: Wang
authors.affiliation: Department of Gynecology, Qingdao Municipal Hospital 1 Jiaozhou Road, Qingdao 266000, China.
authors.forename: Long
authors.initials: L
authors.lastname: Chen
keywords: E-cadherin; cervical cancer; miR-664