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Comparative analysis of co-occurring mutations of specific tumor suppressor genes in lung adenocarcinoma between Asian and Caucasian populations

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  • Yiliang Zhang, Fudan University Shanghai Cancer Center, Fudan University Shanghai Medical College
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  • Yuan Ma, Fudan University Shanghai Cancer Center, Fudan University Shanghai Medical College
  • ,
  • Yuan Li, Fudan University Shanghai Cancer Center, Fudan University Shanghai Medical College
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  • Xuxia Shen, Fudan University Shanghai Cancer Center, Fudan University Shanghai Medical College
  • ,
  • Yongfu Yu
  • Yunjian Pan, Fudan University Shanghai Cancer Center, Fudan University Shanghai Medical College
  • ,
  • Yang Zhang, Fudan University Shanghai Cancer Center, Fudan University Shanghai Medical College
  • ,
  • Difan Zheng, Fudan University Shanghai Cancer Center, Fudan University Shanghai Medical College
  • ,
  • Yue Zhao, Fudan University Shanghai Cancer Center, Fudan University Shanghai Medical College
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  • Ting Ye, Fudan University Shanghai Cancer Center, Fudan University Shanghai Medical College
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  • Bin Li, Fudan University Shanghai Cancer Center, Fudan University Shanghai Medical College
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  • Hong Hu, Fudan University Shanghai Cancer Center, Fudan University Shanghai Medical College
  • ,
  • Yihua Sun, Fudan University Shanghai Cancer Center, Fudan University Shanghai Medical College
  • ,
  • Yawei Zhang, Fudan University Shanghai Cancer Center, Fudan University Shanghai Medical College
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  • Jiaqing Xiang, Fudan University Shanghai Cancer Center, Fudan University Shanghai Medical College
  • ,
  • Haiquan Chen, Fudan University Shanghai Cancer Center, Fudan University Shanghai Medical College

Introduction: Mutated tumor suppressor genes (TSG) such as TP53, STK11, and MGA are widely-reported. We hypothesized the presence of single mutation or co-occurring mutations in these specific genes may represent a significant therapeutic target for lung adenocarcinoma. Methods: We sequenced lung adenocarcinoma samples from 677 East-Asian patients, combined them with those from cBioPortal public database (including TCGA) and performed a comparative analysis between Asian and Caucasian populations. Results: East-Asian lung adenocarcinomas presented distinct driver-mutational distribution compared to that of Caucasians (79% vs 56%, p < 0.001). Similar results were observed in TSG mutations of TP53 (35% vs 46%, p = 0.150), STK11 (4% vs 17%, p = 0.006) and MGA (10% vs 4%, p = 0.166). Compared with none-mutational cases, the patients harboring TSG mutations are more likely to be male (p = 0.009), smokers (p < 0.001), and more advanced disease (p = 0.004). In addition, the TSG-mutated tumors had poorer differentiation (p < 0.001), and more likely to be solid or micropapillary-predominant adenocarcinomas (p < 0.001). Survival analysis showed that both overall survival (OS, p < 0.001) and post-recurrence survival (PRS, p < 0.001) became worse with the accumulation of TSG mutations. However, the prognostic variety was not found in Caucasian patients. Moreover, multivariate analysis proved the accumulation of TSG mutations independently predicts both unfavorable OS (HR = 0.435, 95% CI 0.245–0.774, p = 0.005) and PRS (HR = 0.491, 95% CI 0.269–0.894, p = 0.020) in East-Asian patients, adjusting all other survival-associated factors. Conclusions: Co-occurring mutations of specific TSGs define unfavorable subgroups of lung adenocarcinoma, implying that the tumor promotion mechanisms contribute to the heterogeneity in tumor evolution. However, the Caucasian population did not show the same results, providing insights into the molecular basis underlying the striking racial disparities of this disease and evidence for different gene-panel designs for different population in the purpose of targeted therapy.

Original languageEnglish
JournalJournal of Cancer Research and Clinical Oncology
Volume145
Issue3
Pages (from-to)747-757
Number of pages11
ISSN0171-5216
DOIs
Publication statusPublished - 2019

    Research areas

  • Lung adenocarcinoma, Survival, Tumor suppressor gene (TSG)

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