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학술저널
저자정보
Jung Sungwon (Department of Genome Medicine and Science Gachon University College of Medicine) 이종률 (서울아산병원) 김태원 (성균관대학교) Lee Jongmin (Department of Genome Medicine and Science Gachon University College of Medicine) Yoon Yong Sik (Department of Surgery Asan Medical Center University of Ulsan College of Medicine) Lee Kil Yeon (Department of Surgery Kyung Hee University College of Medicine) Song Ki-hwan (Department of Surgery Koo Hospital) Yu Chang Sik (Division of Colon and Rectal Surgery Department of Surgery University of Ulsan College of Medicine) 조용범 (성균관대학교)
저널정보
대한대장항문학회 Annals of Coloproctology Annals of Coloproctolgy Vol.38 No.1
발행연도
2022.2
수록면
72 - 81 (10page)
DOI
10.3393/ac.2021.00290.0041

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Purpose: Ulcerative colitis (UC) is known to have an association with the increased risk of colorectal cancer (CRC), and UC-associated CRC does not follow the typical progress pattern of adenoma-carcinoma. The aim of this study is to investigate molecular characteristics of UC-associated CRC and further our understanding of the association between UC and CRC.Methods: From 5 patients with UC-associated CRC, matched normal, dysplasia, and tumor specimens were obtained from formalin-fixed paraffin-embedded (FFPE) samples for analysis. Genomic DNA was extracted and whole exome sequencing was conducted to identify somatic variations in dysplasia and tumor samples. Statistical analysis was performed to identify somatic variations with significantly higher frequencies in dysplasia-initiated tumors, and their relevant functions were investigated.Results: Total of 104 tumor mutation genes were identified with higher mutation frequencies in dysplasia-initiated tumors. Four of the 5 dysplasia-initiated tumors (80.0%) have TP53 mutations with frequent stop-gain mutations that were originated from matched dysplasia. APC and KRAS are known to be frequently mutated in general CRC, while none of the 5 patients have APC or KRAS mutation in their dysplasia and tumor samples. Glycoproteins including mucins were also frequently mutated in dysplasia-initiated tumors.Conclusion: UC-associated CRC tumors have distinct mutational characteristics compared to typical adenoma-carcinoma tumors and may have different cancer-driving molecular mechanisms that are initiated from earlier dysplasia status.

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