1. Long interspersed nuclear element 1 hypomethylation has novel prognostic value and potential utility in liquid biopsy for oral cavity cancer
- Author
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Kiyoshi Misawa, Satoshi Yamada, Masato Mima, Takuya Nakagawa, Tomoya Kurokawa, Atsushi Imai, Daiki Mochizuki, Daichi Shinmura, Taiki Yamada, Junya Kita, Ryuji Ishikawa, Yuki Yamaguchi, Yuki Misawa, Takeharu Kanazawa, Hideya Kawasaki, and Hiroyuki Mineta
- Subjects
LINE-1 ,5-hmC ,HNSCC ,Disease-free survival ,Oral cavity cancer ,Therapeutics. Pharmacology ,RM1-950 - Abstract
Abstract Background New biomarkers are urgently needed to improve personalized treatment approaches for head and neck squamous cell carcinoma (HNSCC). Global DNA hypomethylation has wide-ranging functions in multistep carcinogenesis, and the hypomethylation of long interspersed nucleotide element-1 (LINE-1) is related to increased retrotransposon activity and induced genome instability. However, little information is available regarding LINE-1 hypomethylation and its prognostic implications in HNSCC. Methods In this study, we analyzed LINE-1 hypomethylation levels in a well-characterized dataset of 317 primary HNSCC tissues and 225 matched pairs of normal mucosa tissues, along with five oral cavity cancer (OCC) circulating tumor DNA (ctDNA) samples using quantitative real-time methylation and unmethylation PCR. The analysis was performed according to various clinical characteristics and prognostic implications. Results The results demonstrated that LINE-1 hypomethylation levels were significantly higher in the HNSCC tissues than in corresponding normal tissues from the same individuals (P
- Published
- 2020
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