Leptin action on GABAergic neurons prevents obesity and reduces inhibitory tone to POMC neurons.

Leptin action on GABAergic neurons prevents obesity and reduces inhibitory tone to POMC neurons.
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DOI:
10.1016/j.neuron.2011.05.028
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发表时间:
2011-07-14
期刊:
影响因子:
16.2
通讯作者:
Lowell BB
Lowell BB
中科院分区:
医学1区
文献类型:
--
作者:
Vong L;Ye C;Yang Z;Choi B;Chua S Jr;Lowell BB

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Leptin acts in the brain to prevent obesity. The underlying neurocircuitry responsible for this is poorly understood, in part due to incomplete knowledge regarding first order, leptin-responsive neurons. To address this, we and others have been removing leptin receptors from candidate first order neurons. While functionally relevant neurons have been identified, the observed effects have been small suggesting that most first order neurons remain unidentified. Here we take an alternative approach and test whether first order neurons are inhibitory (GABAergic, VGAT+) or excitatory (glutamatergic, VGLUT2+). Remarkably, the vast majority of leptin’s anti-obesity effects are mediated by GABAergic neurons; glutamatergic neurons play only a minor role. Leptin, working directly on presynaptic GABAergic neurons, many of which appear not to express AgRP, reduces inhibitory tone to postsynaptic POMC neurons. As POMC neurons prevent obesity, their disinhibition by leptin action on presynaptic GABAergic neurons likely mediates, at least in part, leptin’s anti-obesity effects.
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