A GABAergic projection from the zona incerta to cortex promotes cortical neuron development.

A GABAergic projection from the zona incerta to cortex promotes cortical neuron development.
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DOI:
10.1126/science.aac6472
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发表时间:
2015-10-30
期刊:
Science (New York, N.Y.)
影响因子:
--
通讯作者:
Kriegstein AR
Kriegstein AR
中科院分区:
其他
文献类型:
--
作者:
Chen J;Kriegstein AR

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γ-氨基丁酸 (GABA) 是成熟大脑中的主要抑制性递质,但在发育中的皮质中具有兴奋性。我们发现小鼠未定带(ZI)投射神经元在新生儿皮质第一层形成 GABA 能轴突丛,与深层和浅层神经元形成突触。发育中的人类皮层中也存在类似的去极化 GABA 神经丛。出生时选择性沉默小鼠 ZI GABA 能神经元会降低皮质神经元的突触活性和顶端树突复杂性。 ZI GABA 能投射随着成熟而变得具有抑制性,并且可以阻止成人大脑中的癫痫样活动。这些数据揭示了从 ZI 到皮质第 1 层的早期发育的 GABA 能投射,这对于皮质神经元的正常发育以及平衡成人皮质的兴奋与抑制至关重要。
γ-Aminobutyric acid (GABA) is the major inhibitory transmitter in the mature brain but is excitatory in the developing cortex. We found that mouse zona incerta (ZI) projection neurons form a GABAergic axon plexus in neonatal cortical layer 1, making synapses with neurons in both deep and superficial layers. A similar depolarizing GABAergic plexus exists in the developing human cortex. Selectively silencing mouse ZI GABAergic neurons at birth decreased synaptic activity and apical dendritic complexity of cortical neurons. The ZI GABAergic projection becomes inhibitory with maturation and can block epileptiform activity in the adult brain. These data reveal an early-developing GABAergic projection from the ZI to cortical layer 1 that is essential for proper development of cortical neurons and balances excitation with inhibition in the adult cortex.
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