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NDRG1 disruption alleviates cisplatin/sodium glycididazole-induced DNA damage response and apoptosis in ERCC1-defective lung cancer cells
- He, Lang, Liu, Kang, Wang, Xiaoshan, Chen, Hong, Zhou, Jin, Wu, Xun, Liu, Tao, Yang, Yongxue, Yang, Xuemei, Cui, Dandan, Song, Guiqin, Wang, un, Lei, Jianguo
- The international journal of biochemistry & cell biology 2018 v.100 pp. 54-60
- DNA damage, DNA repair, Western blotting, apoptosis, cisplatin, drug resistance, drug therapy, flow cytometry, genes, humans, lung neoplasms, neoplasm cells, sequence analysis, stress response
- Resistance to platinum-based chemotherapy becomes a major obstacle in lung cancer treatment. Compensatory activation of nucleotide excision repair (NER) pathway is the major mechanism accounting for cisplatin-resistance. We aimed at identifying additional regulators in NER-mediated chemoresistance in a hypoxic setting induced by sodium glycididazole (CMNa)-sensitized cisplatin chemotherapy of non-small cell lung cancer (NSCLC).We performed an RNA-sequencing (RNA-Seq) analysis to identify the genes whose expression had been differentially regulated in NER-deficient cells that had been treated by cisplatin/CMNa. DNA damage, apoptosis, and correlational analysis between the differentially expressed gene and drug sensitivity were determined by Western blots, flow cytometry and Oncomine expression analysis.The stress response gene, NDRG1 (N-Myc downstream-regulated gene 1), was among the differentially expressed genes in NER-deficient cells upon treatment of cisplatin/CMNa. Downregulation of NDRG1 by ERCC1 (excision repair cross-complementing 1) could be a prevalent mechanism for drug resistance. Furthermore, lower NDRG1 level is observed in human lung cancer cells showing chemotherapeutic drug resistance compared with the drug-sensitive cells.NDRG1 is an important modulator linking DNA damage response and hypoxia-related cellular stress response during the development of drug resistance to cisplatin/CMNa in lung cancer. Targeting both NDRG1 and ERCC1 may be a viable strategy for overcoming drug resistance in cancer therapy, and has significant clinical implications.