Xbp1s in pomc neurons connects ER stress with energy balance and glucose homeostasis

Kevin W. Williams, Tiemin Liu, Xingxing Kong, Makoto Fukuda, Yingfeng Deng, Eric D. Berglund, Zhuo Deng, Yong Gao, Tianya Liu, Jong Woo Sohn, Lin Jia, Teppei Fujikawa, Daisuke Kohno, Michael M. Scott, Syann Lee, Charlotte E. Lee, Kai Sun, Yongsheng Chang, Philipp E. Scherer, Joel K. Elmquist

Research output: Contribution to journalArticlepeer-review

135 Scopus citations

Abstract

Summary The molecular mechanisms underlying neuronal leptin and insulin resistance in obesity and diabetes remain unclear. Here we show that induction of the unfolded protein response transcription factor spliced X-box binding protein 1 (Xbp1s) in pro-opiomelanocortin (Pomc) neurons alone is sufficient to protect against diet-induced obesity as well as improve leptin and insulin sensitivity, even in the presence of strong activators of ER stress. We also demonstrate that constitutive expression of Xbp1s in Pomc neurons contributes to improved hepatic insulin sensitivity and suppression of endogenous glucose production. Notably, elevated Xbp1s levels in Pomc neurons also resulted in activation of the Xbp1s axis in the liver via a cell-nonautonomous mechanism. Together our results identify critical molecular mechanisms linking ER stress in arcuate Pomc neurons to acute leptin and insulin resistance as well as liver metabolism in diet-induced obesity and diabetes.

Original languageEnglish (US)
Pages (from-to)471-482
Number of pages12
JournalCell Metabolism
Volume20
Issue number3
DOIs
StatePublished - Sep 2 2014

ASJC Scopus subject areas

  • Physiology
  • Molecular Biology
  • Cell Biology

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