Regulation of presynaptic neurotransmission by macroautophagy.

Regulation of presynaptic neurotransmission by macroautophagy.
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DOI:
10.1016/j.neuron.2012.02.020
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发表时间:
2012-04-26
期刊:
影响因子:
16.2
通讯作者:
Sulzer D
Sulzer D
中科院分区:
医学1区
文献类型:
--
作者:
Hernandez D;Torres CA;Setlik W;Cebrián C;Mosharov EV;Tang G;Cheng HC;Kholodilov N;Yarygina O;Burke RE;Gershon M;Sulzer D

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mTOR is a regulator of cell growth and survival, protein synthesis-dependent synaptic plasticity, and autophagic degradation of cellular components. When triggered by mTOR inactivation, macroautophagy degrades long-lived proteins and organelles via sequestration into autophagic vacuoles. mTOR further regulates synaptic plasticity, and neurodegeneration occurs when macroautophagy is deficient. Nevertheless, whether macroautophagy is a modulator of presynaptic function was previously unknown. We find that the mTOR inhibitor, rapamycin, induces formation of autophagic vacuoles in prejunctional dopaminergic axons with associated decreased axonal profile volumes, synaptic vesicle numbers, and evoked dopamine release. Evoked dopamine secretion was enhanced and recovery accelerated in transgenic mice in which macroautophagy deficiency was restricted to dopaminergic neurons; rapamycin failed to decrease evoked dopamine release in the striatum of these mice. Macroautophagy that follows mTOR inhibition in presynaptic terminals, therefore, rapidly alters presynaptic structure and neurotransmission.
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