The effect of miRNA-34b/c-5p on neurokinin-1 receptor-truncated expression in breast cancer / 中国肿瘤临床

ABSTRACT

Objective:To investigate the effect of miRNA-34b/c-5p on the expression of neurokinin 1 receptor-truncated(NK1R-Tr)in breast cancer and the effect of miRNA-34b/c-5p and NK1R-Tr on the migration and invasion abilities of breast cancer cells.Methods:Real-time fluorescence quantitative PCR(RT-PCR)was used to detect the expression of miRNA-34b/c-5p and NK1R-Tr in 50 breast can-cer specimens that were collected at Tianjin Medical University Cancer Institute&Hospital from February to May 2013.Western blot analysis was performed to detect the expression of miRNA-34b/c-5p and NK1R-Tr in breast cancer cell lines MDA-MB-231 and MCF-7. Scratch and Transwell assays were carried out to explore the effects of miRNA-34b/c-5p and NK1R-Tr on the migration and invasion abilities of MDA-MB-231 cells.Results:The expression of miRNA-34b/c-5p and NK1R-Tr in breast cancer tissues and cells were signifi-cantly negatively correlated.The relative expression of NK1R-Tr in breast cancer patients with lymph node metastasis was 5.75,and the relative expression of NK1R-Tr in patients with non-lymph node metastasis was 4.29.The relative expression was significantly dif-ferent between the two groups(P=0.026).Overexpression of miRNA-34b/c-5p and knockdown of NK1R-Tr could significantly inhibit the migration and invasion abilities of MDA-MB-231 cells(all P<0.001).Conclusions:The expression of miRNA-34b/c-5p and NK1R-Tr was significantly negatively correlated.MiRNA-34b/c-5p and NK1R-Tr might be potential therapeutic targets for inhibiting the invasion of breast cancer cells.