Ablation of LMO4 in glutamatergic neurons impairs leptin control of fat metabolism.
Ablation of LMO4 in glutamatergic neurons impairs leptin control of fat metabolism.
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DOI:
10.1007/s00018-011-0794-3
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发表时间:
2012-03
影响因子:
8
通讯作者:
Chen, Hsiao-Huei
中科院分区:
文献类型:
--
作者:
Zhou, Xun;Gomez-Smith, Mariana;Qin, Zhaohong;Duquette, Philippe M.;Cardenas-Blanco, Arturo;Rai, Punarpreet S.;Harper, Mary-Ellen;Tsai, Eve C.;Anisman, Hymie;Chen, Hsiao-Huei
The LIM domain only 4 (LMO4) protein is expressed in the hypothalamus, but its function there is not known. Using mice with LMO4 ablated in postnatal glutamatergic neurons, including most neurons of the paraventricular (PVN) and ventromedial (VMH) hypothalamic nuclei where LMO4 is expressed, we asked whether LMO4 is required for metabolic homeostasis. LMO4 mutant mice exhibited early onset adiposity. These mice had reduced energy expenditure and impaired thermogenesis together with reduced sympathetic outflow to adipose tissues. The peptide hormone leptin, produced from adipocytes, activates Jak/Stat3 signaling at the hypothalamus to control food intake, energy expenditure, and fat metabolism. Intracerebroventricular infusion of leptin suppressed feeding similarly in LMO4 mutant and control mice. However, leptin-induced fat loss was impaired and activation of Stat3 in the VMH was blunted in these mice. Thus, our study identifies LMO4 as a novel modulator of leptin function in selective hypothalamic nuclei to regulate fat metabolism.
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影响因子:
16.2
作者:
Dhillon, H;Zigman, JM;Lowelll, BB
通讯作者:
Lowelll, BB
影响因子:
3.7
作者:
Duquette PM;Zhou X;Yap NL;MacLaren EJ;Lu JJ;Wallace VA;Chen HH
通讯作者:
Chen HH
影响因子:
--
作者:
MINOKOSHI, Y;SAITO, M;SHIMAZU, T
通讯作者:
SHIMAZU, T
影响因子:
5.3
作者:
Hahm, KM;Sum, EYM;Orkin, SH
通讯作者:
Orkin, SH
影响因子:
2.5
作者:
Elmquist, JK;Coppari, R;Lowell, BB
通讯作者:
Lowell, BB