4.5 Article

MiR-320a down-regulation mediates bladder carcinoma invasion by targeting ITGB3

期刊

MOLECULAR BIOLOGY REPORTS
卷 41, 期 4, 页码 2521-2527

出版社

SPRINGER
DOI: 10.1007/s11033-014-3110-0

关键词

Bladder carcinoma; MiR-320a; ITGB3; Invasion

资金

  1. National Nature Science Foundation of China [81172408, 30901480, 81301834, 81272716, 81301862]

向作者/读者索取更多资源

To investigate whether the miR-320a could regulate bladder cancer cells invasion by down-regulation of ITGB3. Real-time quantitative PCR was applied to evaluate the expression level of miRNA-320a in bladder transitional cell carcinomas (TCC) and normal bladder transitional cell (NBTC) samples. The invasion ability of miR-320a in TCC T24 cells was analyzed by Transwell assay after pre-miR-320a or anti-miR-125b transfection. For the invasion mechanism analysis of miR-320a on T24 cells, TargetScan, PicTar and miRBase were used to predict the possible target gene of miR-320a. Luciferase activities assay and western blot were used to reveal the predicted target gene of miR-320a were direct and specific. RNA interference technology was used to confirm the invasion inhibition of miR-320a was directly induced by ITGB3. Our study showed that miR-320a was down-regulated in human TCC specimens compared to that in NBTC specimens. Over-expression of miR-320a in T24 cells inhibited TCC invasion and this inhibitory effect on T24 cells could be restore by miR-320a knocked down. Mechanism analysis revealed that ITGB3 was a direct and specific target of miR-320a. The advanced effect of anti-miR-320a on TCC cell invasion was mediated by expression silence of ITGB3. In summary, aberrantly expressed miR-320a contribute to T24 cells invasion partly through directly down-regulating ITGB3 protein expression in TCC and this miRNA signature offers a novel potential therapeutic strategy for TCC.

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