Chinese Clinical Oncology

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Effect of microRNA-96 on proliferation, apoptosis and expression of spindlin1 in cervical cancer cell line HeL

ZHAO Liang,XIA Chunjun,WU Tangbing,GU Wenlong,XIAO Yanhua.   

  1. Department of Physical Diagnosis,Brain Hospital Affiliated to Nanjing Medical University, Nanjing 210029,China
  • Received:2017-05-21 Revised:2017-08-11 Online:2017-10-30 Published:2017-10-30

Abstract: Objective To investigate the effect of microRNA-96 (miR-96) on proliferation, apoptosis and expression of spindlin1 (SPIN1) in cervical cancer cell line HeLa. Methods The miR-96 analog(mimics) and negative control were transfected into cervical cancer HeLa cells (miR-96 transfection group and miR-96 control group) by liposome, and the HeLa cells without transfection were chosen as non-transfection group. Real time quantitative PCR (QPCR) was used to detect the expression of miR-96 in each group at 48 h after transfection. MTT and flow cytometry were used to detect the proliferative and apoptotic rates at 48 h after transfection in each group. The mRNA and protein levels of SPIN1 in each group were detected by QPCR and Western blotting at 48 h after transfection,respectively. The relationship between miR-96 and SPIN1 was verified by double luciferase target test. Results At 48 h after transfection, the miR-96 levels were 1.068±0.053,1.175±0.084 and 2.434±0.088 in non-transfection group, miR-96 control group and miR-96 transfection group. The miR-96 level in miR-96 transfection group was higher than those of other two groups (P<0.05). The proliferative rates were (99.633±5.059)%, (97.727±3.079)% and (62.023±5.425)%, and the apoptotic rates were (7.515±0.924)%,(8.123±1.247)% and (26.845±4.126)% in non-transfection group, miR-96 control group and miR-96 transfection group, respectively. Compared with other two groups,the proliferative rate of miR-96 transfection group decreased and the apoptotic rate increased (P<0.05). The mRNA levels of SPIN1 were 0.965±0.046, 0.917±0.044 and 0.549±0.039,and the protein levels of SPIN1 were 0.667±0.042, 0.715±0.045 and 0.384±0.038 in non-transfection group,miR-96 control group and miR-96 transfection group, respectively. The mRNA and protein levels of SPIN1 in miR-96 transfection group were lower than those of other two groups,and the difference was statistically significant (P<0.05). MiR-96 inhibited luciferase activity of cells with wild-type SPIN1-3’UTR plasmid, but had no effect on luciferase activity in cells with mutant plasmid. Conclusion Overexpression of miR-96 can inhibit the proliferation and apoptosis of cervical cancer cells and reduce the expression level of SPIN1. MiR-96 can target SPIN1 effectively and can be used as an effective target for the treatment of cervical cancer.

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