Core Differences in Synaptic Signaling Between Primary Visual and Dorsolateral Prefrontal Cortex.

Core Differences in Synaptic Signaling Between Primary Visual and Dorsolateral Prefrontal Cortex.
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DOI:
10.1093/cercor/bhx357
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发表时间:
2018-04-01
期刊:
Cerebral cortex (New York, N.Y. : 1991)
影响因子:
--
通讯作者:
Arnsten AFT
Arnsten AFT
中科院分区:
其他
文献类型:
--
作者:
Yang ST;Wang M;Paspalas CD;Crimins JL;Altman MT;Mazer JA;Arnsten AFT

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Neurons in primary visual cortex (V1) are more resilient than those in dorsolateral prefrontal cortex (dlPFC) in aging, schizophrenia and Alzheimer’s disease. The current study compared glutamate and neuromodulatory actions in macaque V1 to those in dlPFC, and found striking regional differences. V1 neuronal firing to visual stimuli depended on AMPA receptors, with subtle NMDA receptor contributions, while dlPFC depends primarily on NMDA receptors. Neuromodulatory actions also differed between regions. In V1, cAMP signaling increased neuronal firing, and the phosphodiesterase PDE4A was positioned to regulate cAMP effects on glutamate release from axons. HCN channels in V1 were classically located on distal dendrites, and enhanced cell firing. These data contrast with dlPFC, where PDE4A and HCN channels are concentrated in thin spines, and cAMP-HCN signaling gates inputs and weakens firing. These regional differences may explain why V1 neurons are more resilient than dlPFC neurons to the challenges of age and disease.
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