Landscape and function of multiple mutations within individual oncogenes

Yuki Saito, Junji Koya, Mitsugu Araki, Yasunori Kogure, Sumito Shingaki, Mariko Tabata, Marni B. McClure, Kota Yoshifuji, Shigeyuki Matsumoto, Yuta Isaka, Hiroko Tanaka, Takanori Kanai, Satoru Miyano, Yuichi Shiraishi, Yasushi Okuno, Keisuke Kataoka

研究成果: Article査読

60 被引用数 (Scopus)


Sporadic reports have described cancer cases in which multiple driver mutations (MMs) occur in the same oncogene1,2. However, the overall landscape and relevance of MMs remain elusive. Here we carried out a pan-cancer analysis of 60,954 cancer samples, and identified 14 pan-cancer and 6 cancer-type-specific oncogenes in which MMs occur more frequently than expected: 9% of samples with at least one mutation in these genes harboured MMs. In various oncogenes, MMs are preferentially present in cis and show markedly different mutational patterns compared with single mutations in terms of type (missense mutations versus in-frame indels), position and amino-acid substitution, suggesting a cis-acting effect on mutational selection. MMs show an overrepresentation of functionally weak, infrequent mutations, which confer enhanced oncogenicity in combination. Cells with MMs in the PIK3CA and NOTCH1 genes exhibit stronger dependencies on the mutated genes themselves, enhanced downstream signalling activation and/or greater sensitivity to inhibitory drugs than those with single mutations. Together oncogenic MMs are a relatively common driver event, providing the underlying mechanism for clonal selection of suboptimal mutations that are individually rare but collectively account for a substantial proportion of oncogenic mutations.

出版ステータスPublished - 2020 6月 4

ASJC Scopus subject areas

  • 一般


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