Abstract:
:Crosstalk between liver and skeletal muscle is vital for glucose homeostasis. Hepatokines, liver-derived proteins that play an important role in regulating muscle metabolism, are important to this communication. Here we identify apolipoprotein J (ApoJ) as a novel hepatokine targeting muscle glucose metabolism and insulin sensitivity through a low-density lipoprotein receptor-related protein-2 (LRP2)-dependent mechanism, coupled with the insulin receptor (IR) signaling cascade. In muscle, LRP2 is necessary for insulin-dependent IR internalization, an initial trigger for insulin signaling, that is crucial in regulating downstream signaling and glucose uptake. Of physiologic significance, deletion of hepatic ApoJ or muscle LRP2 causes insulin resistance and glucose intolerance. In patients with polycystic ovary syndrome and insulin resistance, pioglitazone-induced improvement of insulin action is associated with an increase in muscle ApoJ and LRP2 expression. Thus, the ApoJ-LRP2 axis is a novel endocrine circuit that is central to the maintenance of normal glucose homeostasis and insulin sensitivity.
journal_name
Nat Communjournal_title
Nature communicationsauthors
Seo JA,Kang MC,Yang WM,Hwang WM,Kim SS,Hong SH,Heo JI,Vijyakumar A,Pereira de Moura L,Uner A,Huang H,Lee SH,Lima IS,Park KS,Kim MS,Dagon Y,Willnow TE,Aroda V,Ciaraldi TP,Henry RR,Kim YBdoi
10.1038/s41467-020-15963-wsubject
Has Abstractpub_date
2020-04-24 00:00:00pages
2024issue
1issn
2041-1723pii
10.1038/s41467-020-15963-wjournal_volume
11pub_type
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