PI3K signaling in the ventromedial hypothalamic nucleus is required for normal energy homeostasis.
PI3K signaling in the ventromedial hypothalamic nucleus is required for normal energy homeostasis.
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DOI:
10.1016/j.cmet.2010.05.002
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发表时间:
2010-07-07
期刊:
影响因子:
29
通讯作者:
Elmquist JK
中科院分区:
文献类型:
--
作者:
Xu Y;Hill JW;Fukuda M;Gautron L;Sohn JW;Kim KW;Lee CE;Choi MJ;Lauzon DA;Dhillon H;Lowell BB;Zigman JM;Zhao JJ;Elmquist JK
Phosphatidyl inositol 3-kinase (PI3K) signalling in the hypothalamus has been implicated in the regulation of energy homeostasis, but the critical brain sites where this intracellular signal integrates various metabolic cues to regulate food intake and energy expenditure are unknown. Here we show that mice with reduced PI3K activity in the ventromedial hypothalamic nucleus (VMH) are more sensitive to high fat diet-induced obesity due to reduced energy expenditure. In addition, inhibition of PI3K in the VMH impaired the ability to alter energy expenditure in response to acute high fat diet feeding and food deprivation. Furthermore, the acute anorexigenic effects induced by exogenous leptin were blunted in the mutant mice. Collectively, our results indicate that PI3K activity in VMH neurons plays a physiologically relevant role in the regulation of energy expenditure.
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影响因子:
16.2
作者:
Dhillon, H;Zigman, JM;Lowelll, BB
通讯作者:
Lowelll, BB
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