國家衛生研究院 NHRI:Item 3990099045/13055
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    Please use this identifier to cite or link to this item: http://ir.nhri.org.tw/handle/3990099045/13055


    Title: Clinicopathological and molecular profiles of sporadic microsatellite unstable colorectal cancer with or without the CpG Island Methylator Phenotype (CIMP)
    Authors: Chang, SC;Li, AF;Lin, PC;Lin, CC;Lin, HH;Huang, SC;Lin, CH;Liang, WY;Chen, WS;Jiang, JK;Lin, JK;Yang, SH;Lan, YT
    Contributors: Institute of Molecular and Genomic Medicine
    Abstract: BACKGROUND: The 5'-C-phosphate-G-3' island methylator phenotype (CIMP) is a specific phenotype of colorectal cancer (CRC) associated with microsatellite instability-high (MSI-high) tumors. METHODS: In this study, we determined the CIMP status using eight methylation markers in 92 MSI-high CRC patients after excluding five germline mismatch repair (MMR) gene mutations analyzed by next-generation sequencing (NGS) and confirmed by Sanger sequencing. The mutation spectra of 22 common CRC-associated genes were analyzed by NGS. RESULTS: Of the 92 sporadic MSI-high tumors, 23 (25%) were considered CIMP-high (expressed more than 5 of 8 markers). CIMP-high tumors showed proximal colon preponderance and female predominance. The mutation profiles of CIMP-high tumors were significantly different from those of CIMP-low or CIMP-0 tumors (i.e., higher frequencies of BRAF, POLD1, MSH3, and SMAD4 mutations but lower frequencies of APC, TP53, and KRAS mutations). Multivariate analysis demonstrated that tumor, node, metastasis (TNM) stage was the independent prognostic factor affecting overall survival (OS). Among the MSI-high cases, the CIMP status did not impact the outcome of patients with MSI-high tumors. CONCLUSIONS: Only TNM stage was a statistically significant predictor of outcomes independent of CIMP profiles in MSI-high CRC patients. Sporadic MSI-high CRCs with different mechanisms of carcinogenesis have specific mutation profiles and clinicopathological features.
    Date: 2020-11-23
    Relation: Cancers. 2020 Nov 23;12(11):Article number 3487.
    Link to: http://dx.doi.org/10.3390/cancers12113487
    JIF/Ranking 2023: http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=NHRI&SrcApp=NHRI_IR&KeyISSN=2072-6694&DestApp=IC2JCR
    Cited Times(WOS): https://www.webofscience.com/wos/woscc/full-record/WOS:000593500300001
    Cited Times(Scopus): https://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85096449478
    Appears in Collections:[Others] Periodical Articles

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