Carcinogenesis, Teratogenesis & Mutagenesis

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Effect of DENND2Don the cisplatinum cytotoxicity in H1299 cells by regulating PARP1

LING Bing,FENG Lin,CHENG Shu-jun*   

  1. Department of Etiology and Carcinogenesis, Cancer Institute & Hospital, Peking Union Medical College & Chinese Academy of Medical Sciences, Beijing 100021, China
  • Received:2012-11-19 Revised:2013-02-25 Online:2013-03-30 Published:2013-03-30
  • Contact: CHENG Shu-jun ,E-mail:chengshj@263.net.cn

Abstract:

OBJECTIVE: To investigate the effect of DENN/MADD domain containing 2D (DENND2D) gene on the cytotoxity of cisplatinum in non-small cell lung cancer cell line H1299 and explore the mechanism preliminarily. METHODSDENND2D gene was transient & stably transfected into H1299 cells. CCK-8 assay was used to test the cell counts of DENND2D transfected H1299 cells treated with various concentrations of cisplatinum and IC50 results were attained. PARP1 protein expression was evaluated by western blot. DENND2D over-expressed H1299 cells were treated with cisplatinum for 0,1,2,4 and 8 h. The PAR expressions were measured by Western blot. RESULTS:IC50 was decreased in DENND2D over-expressed group compared to vector group. PARP1 and PAR were down-regulated in DENND2D over-expressed H1299 cells. With the prolonged platinum treatment time,the expression of PAR was down-regulated in DENND2D group whereas it was opposite in the vector group. CONCLUSION:DENND2D may enhanced the cytotoxicity of cisplatinum in H1299 cells by down regulating PARP1.

Key words: DENND2D, PARP1, cisplatinum, non-small cell lung cancer, cytotoxicity