Identification of somatic mutations in non-small cell lung carcinomas using whole-exome sequencing.

Abstract

Lung cancer is the leading cause of cancer-related death, with non-small cell lung cancer (NSCLC) being the predominant form of the disease. Most lung cancer is caused by the accumulation of genomic alterations due to tobacco exposure. To uncover its mutational landscape, we performed whole-exome sequencing in 31 NSCLCs and their matched normal tissue samples. We identified both common and unique mutation spectra and pathway activation in lung adenocarcinomas and squamous cell carcinomas, two major histologies in NSCLC. In addition to identifying previously known lung cancer genes (TP53, KRAS, EGFR, CDKN2A and RB1), the analysis revealed many genes not previously implicated in this malignancy. Notably, a novel gene CSMD3 was identified as the second most frequently mutated gene (next to TP53) in lung cancer. We further demonstrated that loss of CSMD3 results in increased proliferation of airway epithelial cells. The study provides unprecedented insights into mutational processes, cellular pathways and gene networks associated with lung cancer. Of potential immediate clinical relevance, several highly mutated genes identified in our study are promising druggable targets in cancer therapy including ALK, CTNNA3, DCC, MLL3, PCDHIIX, PIK3C2B, PIK3CG and ROCK2.

DOI: 10.1093/carcin/bgs148
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@article{Liu2012IdentificationOS, title={Identification of somatic mutations in non-small cell lung carcinomas using whole-exome sequencing.}, author={Pengyuan Liu and Carl Morrison and Liang Wang and Donghai Xiong and Peter Vedell and Peng Cui and Xing Hua and Feng Ding and Yan Lu and Michael James and John D Ebben and Haiming Xu and Alex A Adjei and Karen Head and Jaime W Andrae and Michael R Tschannen and Howard Jacob and Jing Pan and Qi Zhang and Francoise Van den Bergh and Haijie Xiao and Ken C Lo and Jigar Patel and Todd Richmond and Mary-Anne Watt and Thomas Albert and Rebecca Selzer and Marshall Anderson and Jiang Wang and Yian Wang and Sandra Starnes and Ping Yang and Ming You}, journal={Carcinogenesis}, year={2012}, volume={33 7}, pages={1270-6} }