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Zhao K, Li Y, Lai H, Niu R, Li H, He S, Su Z, Gui Y, Ren L, Yang X, Zhou L. Alterations in HCN1 expression and distribution during epileptogenesis in rats. Epilepsy Res 2024; 202:107355. [PMID: 38555654 DOI: 10.1016/j.eplepsyres.2024.107355] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2023] [Revised: 03/10/2024] [Accepted: 03/21/2024] [Indexed: 04/02/2024]
Abstract
BACKGROUND The hyperpolarization-activated cyclic nucleotide-gated cation channel (HCN1) is predominantly located in key regions associated with epilepsy, such as the neocortex and hippocampus. Under normal physiological conditions, HCN1 plays a crucial role in the excitatory and inhibitory regulation of neuronal networks. In temporal lobe epilepsy, the expression of HCN1 is decreased in the hippocampi of both animal models and patients. However, whether HCN1 expression changes during epileptogenesis preceding spontaneous seizures remains unclear. OBJECTIVE The aim of this study was to determine whether the expression of HCN1 is altered during the epileptic prodromal phase, thereby providing evidence for its role in epileptogenesis. METHODS We utilized a cobalt wire-induced rat epilepsy model to observe changes in HCN1 during epileptogenesis and epilepsy. Additionally, we also compared HCN1 alterations in epileptogenic tissues between cobalt wire- and pilocarpine-induced epilepsy rat models. Long-term video EEG recordings were used to confirm seizures development. Transcriptional changes, translation, and distribution of HCN1 were assessed using high-throughput transcriptome sequencing, total protein extraction, membrane and cytoplasmic protein fractionation, western blotting, immunohistochemistry, and immunofluorescence techniques. RESULTS In the cobalt wire-induced rat epilepsy model during the epileptogenesis phase, total HCN1 mRNA and protein levels were downregulated. Specifically, the membrane expression of HCN1 was decreased, whereas cytoplasmic HCN1 expression showed no significant change. The distribution of HCN1 in the distal dendrites of neurons decreased. During the epilepsy period, similar HCN1 alterations were observed in the neocortex of rats with cobalt wire-induced epilepsy and hippocampus of rats with lithium pilocarpine-induced epilepsy, including downregulation of mRNA levels, decreased total protein expression, decreased membrane expression, and decreased distal dendrite expression. CONCLUSIONS Alterations in HCN1 expression and distribution are involved in epileptogenesis beyond their association with seizure occurrence. Similarities in HCN1 alterations observed in epileptogenesis-related tissues from different models suggest a shared pathophysiological pathway in epileptogenesis involving HCN1 dysregulation. Therefore, the upregulation of HCN1 expression in neurons, maintenance of the HCN1 membrane, and distal dendrite distribution in neurons may represent promising disease-modifying strategies in epilepsy.
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Affiliation(s)
- Ke Zhao
- Department of Neurology, The Seventh Affiliated Hospital of Sun Yat-sen University, Shenzhen, China; Guangzhou National Laboratory, Guangzhou, China; Department of Neurology, The First Affiliated Hospital of Shenzhen University, Shenzhen Second People's Hospital, Shenzhen, China
| | - Yinchao Li
- Department of Neurology, The Seventh Affiliated Hospital of Sun Yat-sen University, Shenzhen, China
| | | | - Ruili Niu
- Guangzhou National Laboratory, Guangzhou, China
| | - Huifeng Li
- Guangzhou National Laboratory, Guangzhou, China
| | - Shipei He
- Guangzhou National Laboratory, Guangzhou, China
| | - Zhengwei Su
- Department of Neurology, The Seventh Affiliated Hospital of Sun Yat-sen University, Shenzhen, China
| | - Yue Gui
- Guangzhou National Laboratory, Guangzhou, China
| | - Lijie Ren
- Department of Neurology, The First Affiliated Hospital of Shenzhen University, Shenzhen Second People's Hospital, Shenzhen, China.
| | | | - Liemin Zhou
- Department of Neurology, The Seventh Affiliated Hospital of Sun Yat-sen University, Shenzhen, China.
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Zhang X, Zhao Y, Du Y, Sun H, Zhang W, Wang A, Li Q, Li C, Wang Y, Du Z, Sun H, Sun L. Effect of ketamine on mood dysfunction and spatial cognition deficits in PTSD mouse models via HCN1-BDNF signaling. J Affect Disord 2021; 286:248-258. [PMID: 33752039 DOI: 10.1016/j.jad.2021.02.058] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/06/2020] [Revised: 01/15/2021] [Accepted: 02/27/2021] [Indexed: 11/19/2022]
Abstract
BACKGROUND Post-traumatic stress disorder (PTSD) is a debilitating mental disease with high morbidity and major social and economic relevance. No efficient treatment for PTSD has thus far been identified. Clinical research has shown that ketamine can rapidly alleviate symptoms in patients with chronic PTSD; however, its pharmacological mechanism has yet to be determined. METHODS This study aimed to identify a model of single prolonged stress (SPS), which induced PTSD-like features in adult mice. Once the model was established, stress-related behavioral changes in the mouse model were evaluated after intraperitoneal injection of ketamine (10 mg/kg). Alterations in certain proteins (HCN1, BDNF, and PSD95) and synaptic ultrastructure in the prefrontal cortex (PFC) and hippocampus (HIP) were measured. RESULTS The mice under the SPS model exhibited anxiety- and depression-like behaviors and induced spatial cognitive deficits, accompanied by elevated HCN1 protein expression in the PFC and HIP, reduced brain-derived neurotrophic factor (BDNF) and PSD95 proteins, and alterations in synaptic morphology. After ketamine administration, the SPS-treated mice restored their protein levels and synaptic ultrastructure in the PFC, and their PTSD-like behaviors improved. However, learning and memory in the SPS-treated mice did not improve in the water maze test, and no significant changes in protein level and synaptic ultrastructure in the HIP were shown. LIMITATIONS The electrophysiological mechanism of the HCN1 ion channel after ketamine administration was not explored. CONCLUSION Ketamine could generally improve SPS-induced mood dysfunction in mice but exerted no effect on the spatial cognitive function, which could be related to the alterations in synaptic morphology and function mediated by HCN1-related BDNF signaling in the PFC and HIP.
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Affiliation(s)
- Xianqiang Zhang
- School of Psychology, Weifang Medical University, 7166# Baotong West Street, Weifang, Shandong 261053, China; National Clinical Research Center for Mental Disorders, Peking University Sixth Hospital/Institute of Mental Health and the Key Laboratory of Mental Health, Ministry of Health (Peking University), Beijing, China
| | - Yanan Zhao
- Student affairs office, Silicon Lake College, 168 Greenland Avenue, Huaqiao International Business Zone, Kunshan, Jiangsu 215332, China
| | - Yalin Du
- Department of Clinical Medicine, Weifang Medical University, 7166# Baotong West Street, Weifang, Shandong 261053, China
| | - Haoran Sun
- Department of Clinical Medicine, Weifang Medical University, 7166# Baotong West Street, Weifang, Shandong 261053, China
| | - Wenlei Zhang
- Department of Clinical Medicine, Weifang Medical University, 7166# Baotong West Street, Weifang, Shandong 261053, China
| | - Aihong Wang
- Department of Hematology, Affiliated Hospital of Weifang Medical University, Weifang, Shandong Province 261031, P. R. China
| | - Qi Li
- Department of Psychiatry and Centre for Reproduction Growth and Development, University of Hong Kong, China
| | - Changjiang Li
- School of Psychology, Weifang Medical University, 7166# Baotong West Street, Weifang, Shandong 261053, China
| | - Yanyu Wang
- School of Psychology, Weifang Medical University, 7166# Baotong West Street, Weifang, Shandong 261053, China
| | - Zhongde Du
- Department of Neurology, Sunshine Union Hospital, 9000# Yingqian Street, Weifang, Shandong 261000, China
| | - Hongwei Sun
- School of Psychology, Weifang Medical University, 7166# Baotong West Street, Weifang, Shandong 261053, China
| | - Lin Sun
- School of Psychology, Weifang Medical University, 7166# Baotong West Street, Weifang, Shandong 261053, China.
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Hou L, Qi Y, Sun H, Wang G, Li Q, Wang Y, Zhang Z, Du Z, Sun L. Applying ketamine to alleviate the PTSD-like effects by regulating the HCN1-related BDNF. Prog Neuropsychopharmacol Biol Psychiatry 2018; 86:313-321. [PMID: 29596995 DOI: 10.1016/j.pnpbp.2018.03.019] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/10/2018] [Revised: 03/07/2018] [Accepted: 03/23/2018] [Indexed: 01/23/2023]
Abstract
BACKGROUND Post-traumatic stress disorder (PTSD) is commonly associated with concurrent anxiety and depression symptoms, and reduce the expression of the Brain-Derived Neurotrophic Factor (BDNF) which promotes the proliferation and survival of neurons. The hyperpolarization-activated cyclic nucleotide-gated channel 1(HCN1) could be inhibited by the ketamine, a drug to alleviate depression and anxiety, and regulated the BDNF expression, however, the effects of ketamine in alleviating PTSD symptoms by regulating the HCN1-related BDNF have been poorly perceived. METHODS In the present study, the effects of ketamine were examined on the PTSD-like effects in a rat model of PTSD induced by SPS&S procedure. After the SPS&S procedure and model testing, PTSD rats were subjected to behavioral testing and biochemical assessments, followed by single treatment with certain doses of ketamine (5, 10, 15 and 20 mg/kg IP). RESULTS The results showed that the SPS&S procedure induced severe PTSD-like behaviors, with lower levels of BDNF protein levels and higher level of the HCN1 protein in the prefrontal cortex (PFC). These were reversed by a single administration of ketamine. The ketamine with dose of 15 mg/kg significantly increased locomotor behavior in the open field test, aggrandized exploratory behavior in the elevated plus maze test, and decreased immobility time spent in the forced swim test. Meanwhile, ketamine with dose of 15 mg/kg could increase the BDNF protein level, while down-regulate the expression of the HCN1. Eventually, there was a negative correlation between the level of BDNF and HCN1 in the PFC. CONCLUSION Ketamine affects the HCN1-related BDNF signaling pathways to alleviate PTSD-like effects in rat.
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Affiliation(s)
- Lanwei Hou
- Department of Clinical Medicine, Weifang Medical University, 7166# Baotong West Street, Weifang, 261053, Shandong, China
| | - Yirui Qi
- Department of Clinical Medicine, Weifang Medical University, 7166# Baotong West Street, Weifang, 261053, Shandong, China
| | - Hongwei Sun
- Department of Psychology, Weifang Medical University, 7166# Baotong West Street, Weifang, 261053, Shandong, China
| | - Gang Wang
- Laboratory for Cognitive Neuroscience, Weifang Medical University, 7166# Baotong West Street, Weifang, 261053, Shandong, China
| | - Qi Li
- Department of Psychiatry, Centre for Reproduction Growth and Development, University of Hong Kong, China
| | - Yanyu Wang
- Department of Psychology, Weifang Medical University, 7166# Baotong West Street, Weifang, 261053, Shandong, China
| | - Zuoji Zhang
- Behavior Medical Education Research Center, Jining Medical University, NO. 16 Hehua Road, Taibaihu District, Jining, 272067, Shandong, China
| | - Zhongde Du
- Department of Neurology, Chinese People's Liberation Army Eighty-Nine Hospital, 256# Beigong West Street, Weifang, 261021, Shandong, China
| | - Lin Sun
- Department of Clinical Medicine, Weifang Medical University, 7166# Baotong West Street, Weifang, 261053, Shandong, China; Department of Psychology, Weifang Medical University, 7166# Baotong West Street, Weifang, 261053, Shandong, China.
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