Wnt signaling regulates hepatic metabolism.
Wnt signaling regulates hepatic metabolism.
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DOI:
10.1126/scisignal.2001249
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发表时间:
2011-02-01
影响因子:
7.3
通讯作者:
Finkel T
中科院分区:
文献类型:
--
作者:
Liu H;Fergusson MM;Wu JJ;Rovira II;Liu J;Gavrilova O;Lu T;Bao J;Han D;Sack MN;Finkel T
The contribution of the Wnt pathway has been extensively characterized in embryogenesis, differentiation, and stem cell biology but not in mammalian metabolism. Here, using in vivo gain- and loss-of-function models, we demonstrate an important role for Wnt signaling in hepatic metabolism. In particular, β-Catenin, the downstream mediator of canonical Wnt signaling, altered serum glucose concentrations and regulated hepatic glucose production. β-catenin also modulated hepatic insulin signaling. Furthermore, β-catenin interacted with the transcription factor FoxO1 in livers from mice under starved conditions. The interaction of FoxO1 with β-catenin regulated the transcriptional activation of the genes encoding glucose-6-phosphatase (G6Pase) and phosphoenolpyruvate carboxykinase (PEPCK), the two rate-limiting enzymes in hepatic gluconeogenesis. Moreover, starvation induced the hepatic expression of mRNAs encoding different Wnt isoforms. In addition, nutrient deprivation appeared to favor the association of β-catenin with FoxO family members, rather than with members of the T cell factor of transcriptional activators. Notably, in a model of diet-induced obesity, hepatic deletion of β-catenin improved overall metabolic homeostasis. These observations implicate Wnt signaling in the modulation of hepatic metabolism and raise the possibility that Wnt signaling may play a similar role in the metabolic regulation of other tissues.
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影响因子:
64.8
作者:
Liu, Yi;Dentin, Renaud;Chen, Danica;Hedrick, Susan;Ravnskjaer, Kim;Schenk, Simon;Milne, Jill;Meyers, David J.;Cole, Phil;Yates, John, III;Olefsky, Jerrold;Guarente, Leonard;Montminy, Marc
通讯作者:
Montminy, Marc
影响因子:
4.2
作者:
Gross, Danielle N.;Wan, Min;Birnbaum, Morris J.
通讯作者:
Birnbaum, Morris J.
影响因子:
56.9
作者:
Brack, Andrew S.;Conboy, Michael J.;Rando, Thomas A.
通讯作者:
Rando, Thomas A.
影响因子:
4.8
作者:
Liu, Zhengyu;Habener, Joel F.
通讯作者:
Habener, Joel F.
影响因子:
56.9
作者:
Mani, Arya;Radhakrishnan, Jayaram;Lifton, Richard P.
通讯作者:
Lifton, Richard P.