Deletion of Mecp2 in Sim1-expressing neurons reveals a critical role for MeCP2 in feeding behavior, aggression, and the response to stress.

Deletion of Mecp2 in Sim1-expressing neurons reveals a critical role for MeCP2 in feeding behavior, aggression, and the response to stress.
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Sim1 表达神经元中 Mecp2 的缺失揭示了 MeCP2 在进食行为、攻击性和应激反应中的关键作用。

DOI:
10.1016/j.neuron.2008.07.030
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发表时间:
2008-09-25
期刊:
影响因子:
16.2
通讯作者:
Zoghbi, Huda Y.
Zoghbi, Huda Y.
中科院分区:
医学1区
文献类型:
--
作者:
Fyffe, Sharyl L.;Neul, Jeff L.;Samaco, Rodney C.;Chao, Hsiao-Tuan;Ben-Shachar, Shay;Moretti, Paolo;McGill, Bryan E.;Goulding, Evan H.;Sullivan, Elinor;Tecott, Laurence H.;Zoghbi, Huda Y.

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Rett Syndrome (RTT) is an autism spectrum disorder caused by mutations in the X-linked gene encoding methyl-CpG binding protein 2 (MeCP2). In order to map the neuroanatomic origins of the complex neuropsychiatric behaviors observed in patients with RTT, and to uncover novel endogenous functions of MeCP2, we removed Mecp2 from Sim1-expressing neurons in the hypothalamus using Cre-loxP technology. Loss of MeCP2 in Sim1-expressing neurons resulted in mice that recapitulated the abnormal physiological stress response that is seen upon MeCP2 dysfunction in the entire brain. Surprisingly, we also uncovered a novel role for MeCP2 in the regulation of social and feeding behaviors since the Mecp2 conditional knockout (CKO) mice were aggressive, hyperphagic and obese. This study demonstrates that deleting Mecp2 in a defined brain region is an excellent approach to map the neuronal origins of complex behaviors and provides new insight about the function of MeCP2 in specific neurons.
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