Rhythmic light flicker rescues hippocampal low gamma and protects ischemic neurons by enhancing presynaptic plasticity
Rhythmic light flicker rescues hippocampal low gamma and protects ischemic neurons by enhancing presynaptic plasticity
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有节律的光闪烁可挽救海马低伽玛并通过增强突触前可塑性来保护缺血神经元
DOI:
10.1038/s41467-020-16826-0
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发表时间:
2020-06
期刊:
影响因子:
--
通讯作者:
Hou Shengtao
中科院分区:
文献类型:
--
作者:
Zheng Lifeng;Yu Mei;Rui Lin;Yunxuan Wang;Zhan Zhuo;Ning Cheng;Mengzhen Wang;Yongqiang Tang;Liping Wang;Hou Shengtao
Abstract The complex relationship between specific hippocampal oscillation frequency deficit and cognitive dysfunction in the ischemic brain is unclear. Here, using a mouse two-vessel occlusion (2VO) cerebral ischemia model, we show that visual stimulation with a 40 Hz light flicker drove hippocampal CA1 slow gamma and restored 2VO-induced reduction in CA1 slow gamma power and theta-low gamma phase-amplitude coupling, but not those of the high gamma. Low gamma frequency lights at 30 Hz, 40 Hz, and 50 Hz, but not 10 Hz, 80 Hz, and arrhythmic frequency light, were protective against degenerating CA1 neurons after 2VO, demonstrating the importance of slow gamma in cognitive functions after cerebral ischemia. Mechanistically, 40 Hz light flicker enhanced RGS12-regulated CA3-CA1 presynaptic N-type calcium channel-dependent short-term synaptic plasticity and associated postsynaptic long term potentiation (LTP) after 2VO. These results support a causal relationship between CA1 slow gamma and cognitive dysfunctions in the ischemic brain.
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