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Xu Y, Shen FY, Liu YZ, Wang L, Wang YW, Wang Z. Dependence of Generation of Hippocampal CA1 Slow Oscillations on Electrical Synapses. Neurosci Bull 2019; 36:39-48. [PMID: 31468346 DOI: 10.1007/s12264-019-00419-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2018] [Accepted: 05/26/2019] [Indexed: 01/01/2023] Open
Abstract
Neuronal oscillations in the hippocampus are critical for many brain functions including learning and memory. The underlying mechanism of oscillation generation has been extensively investigated in terms of chemical synapses and ion channels. Recently, electrical synapses have also been indicated to play important roles, as reported in various brain areas in vivo and in brain slices. However, this issue remains to be further clarified, including in hippocampal networks. Here, using the completely isolated hippocampus, we investigated in vitro the effect of electrical synapses on slow CA1 oscillations (0.5 Hz-1.5 Hz) generated intrinsically by the hippocampus. We found that these oscillations were totally abolished by bath application of a general blocker of gap junctions (carbenoxolone) or a specific blocker of electrical synapses (mefloquine), as determined by whole-cell recordings in both CA1 pyramidal cells and fast-spiking cells. Our findings indicate that electrical synapses are required for the hippocampal generation of slow CA1 oscillations.
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Affiliation(s)
- Yuan Xu
- Institute and Key Laboratory of Brain Functional Genomics of The Chinese Ministry of Education, Shanghai Key Laboratory of Brain Functional Genomics, School of Life Sciences, East China Normal University, Shanghai, 200062, China
| | - Feng-Yan Shen
- Department of Anesthesiology, Huashan Hospital, Fudan University, Shanghai, 200040, China
| | - Yu-Zhang Liu
- Institute and Key Laboratory of Brain Functional Genomics of The Chinese Ministry of Education, Shanghai Key Laboratory of Brain Functional Genomics, School of Life Sciences, East China Normal University, Shanghai, 200062, China
| | - Lidan Wang
- Institute and Key Laboratory of Brain Functional Genomics of The Chinese Ministry of Education, Shanghai Key Laboratory of Brain Functional Genomics, School of Life Sciences, East China Normal University, Shanghai, 200062, China
| | - Ying-Wei Wang
- Department of Anesthesiology, Huashan Hospital, Fudan University, Shanghai, 200040, China
| | - Zhiru Wang
- Institute and Key Laboratory of Brain Functional Genomics of The Chinese Ministry of Education, Shanghai Key Laboratory of Brain Functional Genomics, School of Life Sciences, East China Normal University, Shanghai, 200062, China.
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Chen Q, Luo F, Yue F, Xia J, Xiao Q, Liao X, Jiang J, Zhang J, Hu B, Gao D, He C, Hu Z. Histamine Enhances Theta-Coupled Spiking and Gamma Oscillations in the Medial Entorhinal Cortex Consistent With Successful Spatial Recognition. Cereb Cortex 2017; 28:2439-2457. [DOI: 10.1093/cercor/bhx145] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2017] [Indexed: 12/22/2022] Open
Affiliation(s)
- Quanhui Chen
- Department of Physiology, Collaborative Innovation Center for Brain Science, Third Military Medical University, Chongqing, China
| | - Fenlan Luo
- Department of Physiology, Collaborative Innovation Center for Brain Science, Third Military Medical University, Chongqing, China
| | - Faguo Yue
- Department of Physiology, Collaborative Innovation Center for Brain Science, Third Military Medical University, Chongqing, China
| | - Jianxia Xia
- Department of Physiology, Collaborative Innovation Center for Brain Science, Third Military Medical University, Chongqing, China
| | - Qin Xiao
- Department of Physiology, Collaborative Innovation Center for Brain Science, Third Military Medical University, Chongqing, China
| | - Xiang Liao
- Brain Research Center, Third Military Medical University, Chongqing, China
| | - Jun Jiang
- Department of Basic Psychology, School of Psychology, Third Military Medical University, Chongqing, China
| | - Jun Zhang
- Department of Physiology, Collaborative Innovation Center for Brain Science, Third Military Medical University, Chongqing, China
| | - Bo Hu
- Department of Physiology, Collaborative Innovation Center for Brain Science, Third Military Medical University, Chongqing, China
| | - Dong Gao
- Department of Sleep and Psychology, Institute of Surgery Research, Daping Hospital, Third Military Medical University, Chongqing, China
| | - Chao He
- Department of Physiology, Collaborative Innovation Center for Brain Science, Third Military Medical University, Chongqing, China
| | - Zhian Hu
- Department of Physiology, Collaborative Innovation Center for Brain Science, Third Military Medical University, Chongqing, China
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Zhan Y. Harnessing GABAergic Transmission for Slow Oscillations. Neurosci Bull 2016; 32:501-2. [PMID: 27576517 DOI: 10.1007/s12264-016-0058-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2016] [Accepted: 08/16/2016] [Indexed: 10/21/2022] Open
Affiliation(s)
- Yang Zhan
- Brain Cognition and Brain Disease Institute, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, 518055, China.
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