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Enomoto S, Kato TA. Involvement of microglia in disturbed fear memory regulation: Possible microglial contribution to the pathophysiology of posttraumatic stress disorder. Neurochem Int 2020; 142:104921. [PMID: 33232758 DOI: 10.1016/j.neuint.2020.104921] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2020] [Revised: 11/11/2020] [Accepted: 11/18/2020] [Indexed: 02/07/2023]
Abstract
Microglia, immune cells in the brain, play a crucial role in brain inflammation and synaptic plasticity by releasing inflammatory mediators and neurotrophic factors as well as, phagocytosing synaptic elements. Recent studies have shown peripheral inflammation, immune alteration in the brain are associated with post-traumatic stress disorder (PTSD) in humans. Several preclinical studies using Pavlovian fear conditioning have suggested that microglia are involved in fear memory dysregulation and altered fear neuronal networks. Microglial priming resulting from previous stressful experiences may also have an effect. This review will introduce the current knowledge of microglial contribution to disturbed fear memory regulation, a fundamental feature of PTSD.
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Affiliation(s)
- Shingo Enomoto
- Self Defense Force, Fukuoka Hospital, 1-61 Kokura Higashi, Kasuga-Si, Fukuoka, 816-0826, Japan; Department of Neuropsychiatry, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi Higashi-Ku, Fukuoka, 812-8582, Japan
| | - Takahiro A Kato
- Department of Neuropsychiatry, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi Higashi-Ku, Fukuoka, 812-8582, Japan.
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Yang L, Wang J, Wang D, Hu G, Liu Z, Yan D, Serikuly N, Alpyshov ET, Demin KA, Strekalova T, de Abreu MS, Song C, Kalueff AV. Delayed behavioral and genomic responses to acute combined stress in zebrafish, potentially relevant to PTSD and other stress-related disorders: Focus on neuroglia, neuroinflammation, apoptosis and epigenetic modulation. Behav Brain Res 2020; 389:112644. [PMID: 32344037 DOI: 10.1016/j.bbr.2020.112644] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2020] [Revised: 03/22/2020] [Accepted: 04/05/2020] [Indexed: 12/30/2022]
Abstract
Stress is a common trigger of stress-related illnesses, such as anxiety, phobias, depression and post-traumatic stress disorder (PTSD). Various animal models successfully reproduce core behaviors of these clinical conditions. Here, we develop a novel zebrafish model of stress (potentially relevant to human stress-related disorders), based on delayed persistent behavioral, endocrine and genomic responses to an acute severe 'combined' stressor. Specifically, one week after adult zebrafish were exposed to a complex combined 90-min stress, we assessed their behaviors in the novel tank and the light-dark box tests, as well as whole-body cortisol and brain gene expression, focusing on genomic biomarkers of microglia, astrocytes, neuroinflammation, apoptosis and epigenetic modulation. Overall, stressed fish displayed persistent anxiety-like behavior, elevated whole-body cortisol, as well as upregulated brain mRNA expression of genes encoding the glucocorticoid receptor, neurotrophin BDNF and its receptors (TrkB and P75), CD11b (a general microglial biomarker), COX-2 (an M1-microglial biomarker), CD206 (an M2-microglial biomarker), GFAP (a general astrocytal biomarker), C3 (an A1-astrocytal biomarker), S100α10 (an A2-astrocytal biomarker), as well as pro-inflammatory cytokines IL-6, IL-1β, IFN-γ and TNF-α. Stress exposure also persistently upregulated the brain expression of several key apoptotic (Bax, Caspase-3, Bcl-2) and epigenetic genes (DNMT3a, DNMT3b, HAT1, HDAC4) in these fish. Collectively, the present model not only successfully recapitulates lasting behavioral and endocrine symptoms of clinical stress-related disorders, but also implicates changes in neuroglia, neuroinflammation, apoptosis and epigenetic modulation in long-term effects of stress pathogenesis in vivo.
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Affiliation(s)
- LongEn Yang
- School of Pharmacy, Southwest University, Chongqing, China
| | - Jingtao Wang
- School of Pharmacy, Southwest University, Chongqing, China
| | - Dongmei Wang
- School of Pharmacy, Southwest University, Chongqing, China
| | - Guojun Hu
- School of Pharmacy, Southwest University, Chongqing, China
| | - ZiYuan Liu
- School of Pharmacy, Southwest University, Chongqing, China
| | - Dongni Yan
- School of Pharmacy, Southwest University, Chongqing, China
| | - Nazar Serikuly
- School of Pharmacy, Southwest University, Chongqing, China
| | - Erik T Alpyshov
- School of Pharmacy, Southwest University, Chongqing, China; Granov Russian Scientific Center of Radiology and Surgical Technologies, Ministry of Healthcare of Russian Federation, St. Petersburg, Russia; Scientific Research Institute of Physiology and Basic Medicine, Novosibirsk, Russia; Institute of Medicine and Psychology, Novosibirsk State University, Novosibirsk, Russia
| | - Konstantin A Demin
- Institute of Experimental Medicine, Almazov Medical Research Center, Ministy of Healthcare of Russian Federation, St. Petersburg, Russia
| | - Tatyana Strekalova
- I.M. Sechenov First Moscow State Medical University, Moscow, Russia; Maastricht University, Maastricht, the Netherlands; Research Institute of General Pathology and Pathophysiology, Moscow, Russia
| | - Murilo S de Abreu
- Bioscience Institute, University of Passo Fundo, Passo Fundo, Brazil
| | - Cai Song
- Institute for Marine Drugs and Nutrition, Marine Medicine Development Center, Shenzhen Institute, Guangdong Ocean University, Zhanjiang, China
| | - Allan V Kalueff
- School of Pharmacy, Southwest University, Chongqing, China; Ural Federal University, Ekaterinburg, Russia.
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Miao Z, Wang Y, Sun Z. The Relationships Between Stress, Mental Disorders, and Epigenetic Regulation of BDNF. Int J Mol Sci 2020; 21:ijms21041375. [PMID: 32085670 PMCID: PMC7073021 DOI: 10.3390/ijms21041375] [Citation(s) in RCA: 46] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2019] [Revised: 02/01/2020] [Accepted: 02/15/2020] [Indexed: 12/25/2022] Open
Abstract
Brain-derived neurotrophic factor (BDNF), a critical member of the neurotrophic family, plays an important role in multiple stress-related mental disorders. Although alterations in BDNF in multiple brain regions of individuals experiencing stress have been demonstrated in previous studies, it appears that a set of elements are involved in the complex regulation. In this review, we summarize the specific brain regions with altered BDNF expression during stress exposure. How various environmental factors, including both physical and psychological stress, affect the expression of BDNF in specific brain regions are further summarized. Moreover, epigenetic regulation of BDNF, including DNA methylation, histone modification, and noncoding RNA, in response to diverse types of stress, as well as sex differences in the sensitivity of BDNF to the stress response, is also summarized. Clarification of the underlying role of BDNF in the stress process will promote our understanding of the pathology of stress-linked mental disorders and provide a potent target for the future treatment of stress-related illness.
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Affiliation(s)
- Zhuang Miao
- Institute of Genomic Medicine, Wenzhou Medical University, Wenzhou 325000, China;
- Beijing Institutes of Life Science, Chinese Academy of Sciences, Beijing 100101, China;
- Department of Physiology, University of Toronto, Toronto, ON M5S 1A8, Canada
| | - Yan Wang
- Beijing Institutes of Life Science, Chinese Academy of Sciences, Beijing 100101, China;
- School of Life Sciences, University of the Chinese Academy of Sciences, Beijing 100049, China
| | - Zhongsheng Sun
- Institute of Genomic Medicine, Wenzhou Medical University, Wenzhou 325000, China;
- Beijing Institutes of Life Science, Chinese Academy of Sciences, Beijing 100101, China;
- School of Life Sciences, University of the Chinese Academy of Sciences, Beijing 100049, China
- Correspondence:
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