Comprehensive profiling of DNA methylation in Korean patients with colorectal cancer

Hyeran Shim, Kiwon Jang, Yeong Hak Bang, Hoang Bao Khanh Chu, Jisun Kang, Jin Young Lee, Sheehyun Cho, Hong Seok Lee, Jongbum Jeon, Taeyeon Hwang, Soobok Joe, Jinyeong Lim, Ji Hye Choi, Eun Hye Joo, Kyunghee Park, Ji Hwan Moon, Kyung Yeon Han, Yourae Hong, Woo Yong Lee, Hee Cheol KimSeong Hyeon Yun, Yong Beom Cho, Yoon Ah Park, Jung Wook Huh, Jung Kyong Shin, Dae Hee Pyo, Hyekyung Hong, Hae Ock Lee, Woong Yang Park, Jin Ok Yang, Young Joon Kim

Research output: Contribution to journalArticlepeer-review

Abstract

Alterations in DNA methylation play an important pathophysiological role in the development and progression of colorectal cancer. We comprehensively profiled DNA methylation alterations in 165 Korean patients with colorectal cancer (CRC), and conducted an in-depth investigation of cancer-specific methylation patterns. Our analysis of the tumor samples revealed a significant presence of hypomethylated probes, primarily within the gene body regions; few hypermethylated sites were observed, which were mostly enriched in promoter-like and CpG island regions. The CpG Island Methylator Phenotype-High (CIMP-H) exhibited notable enrichment of microsatellite instability-high (MSI-H). Additionally, our findings indicated a significant correlation between methylation of the MLH1 gene and MSI-H status. Furthermore, we found that the CIMP-H had a higher tendency to affect the right-side of the colon tissues and was slightly more prevalent among older patients. Through our methylome profile analysis, we successfully verified the methylation patterns and clinical characteristics of Korean patients with CRC.

Original languageEnglish
Pages (from-to)110-115
Number of pages6
JournalBMB Reports
Volume57
Issue number2
DOIs
StatePublished - 2024

Bibliographical note

Publisher Copyright:
© 2024 by the The Korean Society for Biochemistry and Molecular Biology. All Rights Reserved.

Keywords

  • Colorectal cancer
  • CpG island methylator phenotype (CIMP)
  • DNA methylation
  • MutL homolog 1 (MLH1)

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