Abstract：
:Leptin signaling in the hypothalamus plays a crucial role in the regulation of body weight. Leptin resistance, in which leptin signaling is disrupted, is a major obstacle to the improvement of obesity. We herein demonstrated that protein tyrosine phosphatase receptor type J (Ptprj) is expressed in hypothalamic neurons together with leptin receptors, and that PTPRJ negatively regulates leptin signaling by inhibiting the activation of JAK2, the primary tyrosine kinase in leptin signaling, through the dephosphorylation of Y813 and Y868 in JAK2 autophosphorylation sites. Leptin signaling is enhanced in Ptprj-deficient mice, and they exhibit lower weight gain than wild-type mice because of a reduced food intake. Diet-induced obesity and the leptin treatment up-regulated PTPRJ expression in the hypothalamus, while the overexpression of PTPRJ induced leptin resistance. Thus, the induction of PTPRJ is a factor contributing to the development of leptin resistance, and the inhibition of PTPRJ may be a potential strategy for improving obesity.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Shintani T,Higashi S,Suzuki R,Takeuchi Y,Ikaga R,Yamazaki T,Kobayashi K,Noda Mdoi
10.1038/s41598-017-12070-7subject
Has Abstractpub_date
2017-09-14 00:00:00pages
11627issue
1issn
2045-2322pii
10.1038/s41598-017-12070-7journal_volume
7pub_type
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