101. Genomic landscape of lung adenocarcinoma in East Asians.
- Author
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Chen J, Yang H, Teo ASM, Amer LB, Sherbaf FG, Tan CQ, Alvarez JJS, Lu B, Lim JQ, Takano A, Nahar R, Lee YY, Phua CZJ, Chua KP, Suteja L, Chen PJ, Chang MM, Koh TPT, Ong BH, Anantham D, Hsu AAL, Gogna A, Too CW, Aung ZW, Lee YF, Wang L, Lim TKH, Wilm A, Choi PS, Ng PY, Toh CK, Lim WT, Ma S, Lim B, Liu J, Tam WL, Skanderup AJ, Yeong JPS, Tan EH, Creasy CL, Tan DSW, Hillmer AM, and Zhai W
- Subjects
- Adenocarcinoma of Lung etiology, Adenocarcinoma of Lung mortality, Adenocarcinoma of Lung therapy, Aged, Asian People genetics, Cohort Studies, DNA Copy Number Variations, ErbB Receptors genetics, Exome, Female, Gene Expression Profiling, Humans, Lung Neoplasms etiology, Lung Neoplasms mortality, Lung Neoplasms therapy, Male, Middle Aged, Proto-Oncogene Proteins p21(ras) genetics, Singapore, Tumor Suppressor Protein p53 genetics, Adenocarcinoma of Lung genetics, Lung Neoplasms genetics, Mutation
- Abstract
Lung cancer is the world's leading cause of cancer death and shows strong ancestry disparities. By sequencing and assembling a large genomic and transcriptomic dataset of lung adenocarcinoma (LUAD) in individuals of East Asian ancestry (EAS; n = 305), we found that East Asian LUADs had more stable genomes characterized by fewer mutations and fewer copy number alterations than LUADs from individuals of European ancestry. This difference is much stronger in smokers as compared to nonsmokers. Transcriptomic clustering identified a new EAS-specific LUAD subgroup with a less complex genomic profile and upregulated immune-related genes, allowing the possibility of immunotherapy-based approaches. Integrative analysis across clinical and molecular features showed the importance of molecular phenotypes in patient prognostic stratification. EAS LUADs had better prediction accuracy than those of European ancestry, potentially due to their less complex genomic architecture. This study elucidated a comprehensive genomic landscape of EAS LUADs and highlighted important ancestry differences between the two cohorts.
- Published
- 2020
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