The Rho-guanine nucleotide exchange factor PDZ-RhoGEF governs susceptibility to diet-induced obesity and type 2 diabetes

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningfagfællebedømt


  • Ying-Ju Chang
  • Scott Pownall
  • Jensen, Thomas Elbenhardt
  • Samar Mouaaz
  • Warren Foltz
  • Lily Zhou
  • Nicole Liadis
  • Minna Woo
  • Zhenyue Hao
  • Previn Dutt
  • Philip J. Bilan
  • Amira Klip
  • Tak Mak
  • Vuk Stambolic
Adipose tissue is crucial for the maintenance of energy and metabolic homeostasis and its deregulation can lead to obesity and type II diabetes (T2D).
Using gene disruption in the mouse, we discovered a function for a RhoA-specific guanine nucleotide exchange factor PDZ-RhoGEF (Arhgef11) in white adipose tissue biology. While PDZ-RhoGEF was dispensable for a number of RhoA signaling-mediated processes in mouse embryonic fibroblasts, including stress fiber formation and cell migration, it's deletion led to a reduction in their
proliferative potential. On a whole organism level, PDZ-RhoGEF deletion resulted
in an acute increase in energy expenditure, selectively impaired early adipose
tissue development and decreased adiposity in adults. PDZ-RhoGEF-deficient
mice were protected from diet-induced obesity and T2D. Mechanistically, PDZ-
RhoGEF enhanced insulin/IGF-1 signaling in adipose tissue by controlling
ROCK-dependent phosphorylation of the insulin receptor substrate-1 (IRS-1).
Our results demonstrate that PDZ-RhoGEF acts as a key determinant of
mammalian metabolism and obesity-associated pathologies.
Antal sider24
StatusUdgivet - 2015
Eksternt udgivetJa

Bibliografisk note

CURIS 2016 NEXS 015

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