Loss of MEN1 activates DNMT1 implicating DNA hypermethylation as a driver of MEN1 tumorigenesis

Ziqiang Yuan, Carmen Sánchez Claros, Masako Suzuki, Elaine C. Maggi, Justin D. Kaner, Noah Kinstlinger, Jolanta Gorecka, Thomas J. Quinn, Rula Geha, Amanda Corn, Jessica Pastoriza, Qiang Jing, Asha Adem, Hao Wu, Girum Alemu, Yi Chieh Du, Deyou Zheng, John M. Greally, Steven K. Libutti

    Research output: Contribution to journalArticlepeer-review

    13 Scopus citations

    Abstract

    Multiple endocrine neoplasia type 1 (MEN1) syndrome results from mutations in the MEN1 gene and causes tumor formation via largely unknown mechanisms. Using a novel genome-wide methylation analysis, we studied tissues from MEN1- parathyroid tumors, Men1 knockout (KO) mice, and Men1 null mouse embryonic fibroblast (MEF) cell lines. We demonstrated that inactivation of menin (the protein product of MEN1) increases activity of DNA (cytosine-5)-methyltransferase 1 (DNMT1) by activating retinoblastoma-binding protein 5 (Rbbp5). The increased activity of DNMT1 mediates global DNA hypermethylation, which results in aberrant activation of the Wnt/β- catenin signaling pathway through inactivation of Sox regulatory genes. Our study provides important insights into the role of menin in DNA methylation and its impact on the pathogenesis of MEN1 tumor development.

    Original languageEnglish (US)
    Pages (from-to)12633-12650
    Number of pages18
    JournalOncotarget
    Volume7
    Issue number11
    DOIs
    StatePublished - Mar 15 2016

    All Science Journal Classification (ASJC) codes

    • Oncology

    Keywords

    • DNMT1
    • Global DNA methylation
    • HELP-tagging
    • MEN1
    • Sox/Wnt/β-catenin signaling pathway

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