Acta Anatomica Sinica ›› 2019, Vol. 50 ›› Issue (2): 185-191.doi: 10.16098/j.issn.0529-1356.2019.02.008

• Cancer Biology • Previous Articles     Next Articles

MicroRNA-140-5p promotes cell proliferation via protein kinase C isoform ε in renal cell carcinoma 

LIU Wei-hong1 YU Xiao1 REN Yu 2,4 LIU Kai-tai3 LIN Chen1 WANG Ping 1,4*   

  1. 1.Department of Human Anatomy, Histology and Embryology, Medical School, Ningbo University, Zhejiang Ningbo 315211, China;  2.Laboratory Kidney Carcinoma, Ningbo Urology and Nephrology Hospital, Zhejiang Ningbo 315000, China;  3.Ningbo City Medical Treatment Center Lihuili Hospital, Medical School, Ningbo University,  Zhejiang Ningbo 315041, China;  4. Laboratory of Kidney Carcinoma, Urology and Nephrology Institute of Ningbo University, Zhejiang Ningbo 315000, China
  • Received:2018-05-15 Revised:2018-07-25 Online:2019-04-06 Published:2019-04-06
  • Contact: WANG Ping E-mail:89117968@qq.com

Abstract:

Objective To explore the role of micro RNA-140-5p(miR-140-5p) in renal cell carcinoma (RCC) tumorigenesis. Methods The expression of miR-140-5p was determined by Real-time PCR in RCC (Caki-1, ACHN, OS-RC-2 and 786-O), and compared with kidney cortex proximal tubule cell (HK-2). After Caki-1 and 786-O cells were transfected with miR-140-5p inhibitor or mimic, the cell proliferation, cell cycle and related proteins were evaluated by MTS assay, flow cytometry and Western blotting. Results Caki-1 and 786-O showed the highest and lowest expression of miR-140-5p respectively. After the level of miR-140-5p in Caki-1 cells was decreased, cell proliferation was inhibited and cell number in G0/G1 phase was increased significantly, along with the reduction of cyclin D, E and CDK2, 4. Furthermore, the increasing level of miR-140-5p in 786-O cells promoted cell proliferation in vitro and tumorigenesis in vivo.Moreover, microarray demonstrated that protein kinase C isoform ε(PKCε), a markedly enhanced gene in RCC cells with the changed level of miR-140-5p. The combination treatment with down-regulation of PKCε, inhibitor/mimic induced changes of cell proliferation and cell cycle arrests were marked reversed in Caki-1 and 786-O cells.Conclusion These result indicate that miR-140-5p may promote cell proliferation via PKCεin RCC.

Key words: Micro RNA-140-5p, Renal cell carcinoma, Cell proliferation, Cell cycle, Real-time PCR, Human