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논문 기본 정보

자료유형
학술저널
저자정보
Kim Jeong Eun (University of Ulsan College of Medicine) Choi Jaeyong (Seoul National University College of Medicine) Sung Chang-Ohk (University of Ulsan College of Medicine) Hong Yong Sang (University of Ulsan College of Medicine) Kim Sun Young (University of Ulsan College of Medicine) Lee Hyunjung (Seoul National University College of Medicine) Kim Tae Won (University of Ulsan College of Medicine) Kim Jong-Il (Seoul National University College of Medicine)
저널정보
대한생화학·분자생물학회 Experimental and Molecular Medicine Experimental and Molecular Medicine 제53권
발행연도
2021.3
수록면
1 - 11 (11page)
DOI
10.1038/s12276-021-00583-1

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The global incidence of early-onset colorectal cancer (EO-CRC) is rapidly rising. However, the reason for this rise in incidence as well as the genomic characteristics of EO-CRC remain largely unknown. We performed whole-exome sequencing in 47 cases of EO-CRC and targeted deep sequencing in 833 cases of CRC. Mutational profiles of EO-CRC were compared with previously published large-scale studies. EO-CRC and The Cancer Genome Atlas (TCGA) data were further investigated according to copy number profiles and mutation timing. We classified colorectal cancer into three subgroups: the hypermutated group consisted of mutations in POLE and mismatch repair genes; the whole-genome doubling group had early functional loss of TP53 that led to whole-genome doubling and focal oncogene amplification; the genome-stable group had mutations in APC and KRAS , similar to conventional colon cancer. Among non-hypermutated samples, whole-genome doubling was more prevalent in early-onset than in late-onset disease (54% vs 38%, Fisher’s exact P =?0.04). More than half of non-hypermutated EO-CRC cases involved early TP53 mutation and whole-genome doubling, which led to notable differences in mutation frequencies between age groups. Alternative carcinogenesis involving genomic instability via loss of TP53 may be related to the rise in EO-CRC.

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