Open AccessIdentification of two methylated fragments of an SDC2 CpG island using a sliding window technique for early detection of colorectal cancer
Author(s) -
Li Ruibin,
Qu Bing,
Wan Kangkang,
Lu Changming,
Li Tingting,
Zhou Fuxiang,
Lin Jun
Publication year - 2021
Publication title -
febs open bio
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.718
H-Index - 31
ISSN - 2211-5463
DOI - 10.1002/2211-5463.13180
Subject(s) - cpg site , colorectal cancer , dna methylation , differentially methylated regions , methylation , biomarker , biology , cancer , cancer research , oncology , medicine , gene , genetics , gene expression
Colorectal cancer (CRC) is one of the most common cancer types globally with a 5‐year survival rate of < 50% in China. Aberrant DNA methylation is one of the hallmarks of tumor initiation, progression, and metastasis. Here, we investigated the clinical performance of two differentially methylated regions (DMRs) in SDC2 CpG islands for the detection of CRC. A sliding window technique was used to identify the DMRs, and methylation‐specific PCR assay was used to assess the DMRs in 198 CRC samples and 54 normal controls. Two DMRs (DMR2 and DMR5) were identified using The Cancer Genome Atlas (TCGA) data, and the hypermethylation of DMR2 and DMR5 was detected in 90.91% (180/198) and 89.90% (178/198) of CRC samples, respectively. When combining DMR2 and DMR5, the sensitivity for CRC detection was 94.4% higher than that of DMR2 or DMR5 alone. Based on the above results, we propose using DMR2 and DMR5 as a sensitive biomarker to detect CRC.