Prmt7 deficiency causes reduced skeletal muscle oxidative metabolism and age-related obesity

Hyeon Ju Jeong, Hye Jin Lee, Tuan Anh Vuong, Kyu Sil Choi, Dahee Choi, Seung-Hoi Koo, Sung Chun Cho, Hana Cho, Jong Sun Kang

    Research output: Contribution to journalArticlepeer-review

    56 Citations (Scopus)

    Abstract

    Maintenance of skeletal muscle function is critical for metabolic health and the disruption of which exacerbates many chronic diseases such as obesity and diabetes. Skeletal muscle responds to exercise or metabolic demands by a fiber-type switch regulated by signaling-transcription networks that remains to be fully defined. Here, we report that protein arginine methyltransferase 7 (Prmt7) is a key regulator for skeletal muscle oxidative metabolism. Prmt7 is expressed at the highest levels in skeletal muscle and decreased in skeletal muscles with age or obesity. Prmt7-/- muscles exhibit decreased oxidative metabolism with decreased expression of genes involved in muscle oxidative metabolism, including PGC-1α. Consistently, Prmt7-/- mice exhibited significantly reduced endurance exercise capacities. Furthermore, Prmt7-/- mice exhibit decreased energy expenditure, which might contribute to the exacerbated age-related obesity of Prmt7-/- mice. Similarly to Prmt7-/- muscles, Prmt7 depletion in myoblasts also reduces PGC-1α expression and PGC-1α-promoter driven reporter activities. Prmt7 regulates PGC-1α expression through interaction with and activation of p38 mitogen-activated protein kinase (p38MAPK), which in turn activates ATF2, an upstream transcriptional activator for PGC-1α. Taken together, Prmt7 is a novel regulator for muscle oxidative metabolism via activation of p38MAPK/ATF2/PGC-1α.

    Original languageEnglish
    Pages (from-to)1868-1882
    Number of pages15
    JournalDiabetes
    Volume65
    Issue number7
    DOIs
    Publication statusPublished - 2016 Jul 1

    ASJC Scopus subject areas

    • Internal Medicine
    • Endocrinology, Diabetes and Metabolism

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