1
|
Jiao H, Kalsbeek A, Yi CX. Microglia, circadian rhythm and lifestyle factors. Neuropharmacology 2024; 257:110029. [PMID: 38852838 DOI: 10.1016/j.neuropharm.2024.110029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2024] [Revised: 05/30/2024] [Accepted: 06/03/2024] [Indexed: 06/11/2024]
Abstract
Microglia, a vital homeostasis-keeper of the central nervous system, perform critical functions such as synaptic pruning, clearance of cellular debris, and participation in neuroinflammatory processes. Recent research has shown that microglia exhibit strong circadian rhythms that not only actively regulate their own immune activity, but also affect neuronal function. Disruptions of the circadian clock have been linked to a higher risk of developing a variety of diseases. In this article we will provide an overview of how lifestyle factors impact microglial function, with a focus on disruptions caused by irregular sleep-wake patterns, reduced physical activity, and eating at the wrong time-of-day. We will also discuss the potential connection between these lifestyle factors, disrupted circadian rhythms, and the role of microglia in keeping brain health. This article is part of the Special Issue on "Microglia".
Collapse
Affiliation(s)
- Han Jiao
- Department of Endocrinology and Metabolism, Amsterdam University Medical Center, location AMC, University of Amsterdam, Amsterdam, the Netherlands; Amsterdam Gastroenterology Endocrinology and Metabolism, Amsterdam, the Netherlands; Department of Clinical Chemistry, Laboratory of Endocrinology, Amsterdam University Medical Center, location AMC, Amsterdam, the Netherlands; Netherlands Institute for Neuroscience, Amsterdam, the Netherlands
| | - Andries Kalsbeek
- Department of Endocrinology and Metabolism, Amsterdam University Medical Center, location AMC, University of Amsterdam, Amsterdam, the Netherlands; Amsterdam Gastroenterology Endocrinology and Metabolism, Amsterdam, the Netherlands; Department of Clinical Chemistry, Laboratory of Endocrinology, Amsterdam University Medical Center, location AMC, Amsterdam, the Netherlands; Netherlands Institute for Neuroscience, Amsterdam, the Netherlands
| | - Chun-Xia Yi
- Department of Endocrinology and Metabolism, Amsterdam University Medical Center, location AMC, University of Amsterdam, Amsterdam, the Netherlands; Amsterdam Gastroenterology Endocrinology and Metabolism, Amsterdam, the Netherlands; Department of Clinical Chemistry, Laboratory of Endocrinology, Amsterdam University Medical Center, location AMC, Amsterdam, the Netherlands; Netherlands Institute for Neuroscience, Amsterdam, the Netherlands.
| |
Collapse
|
2
|
Xu S, Jia M, Guo J, He J, Chen X, Xu Y, Hu W, Wu D, Wu C, Ji X. Ticking Brain: Circadian Rhythm as a New Target for Cerebroprotection. Stroke 2024; 55:2385-2396. [PMID: 39011642 DOI: 10.1161/strokeaha.124.046684] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/17/2024]
Abstract
Circadian rhythm is a master process observed in nearly every type of cell throughout the body, and it macroscopically regulates daily physiology. Recent clinical trials have revealed the effects of circadian variation on the incidence, pathophysiological processes, and prognosis of acute ischemic stroke. Furthermore, core clock genes, the cell-autonomous pacemakers of the circadian rhythm, affect the neurovascular unit-composing cells in a nonparallel manner after the same pathophysiological processes of ischemia/reperfusion. In this review, we discuss the influence of circadian rhythms and clock genes on each type of neurovascular unit cell in the pathophysiological processes of acute ischemic stroke.
Collapse
Affiliation(s)
- Shuaili Xu
- Beijing Institute of Brain Disorders, Laboratory of Brain Disorders, Ministry of Science and Technology, Collaborative Innovation Center for Brain Disorders (S.X., X.J.), Capital Medical University, Beijing, China
- China-America Institute of Neuroscience, Xuanwu Hospital (S.X., J.G., J.H., X.C., Y.X., W.H., D.W., X.J.), Capital Medical University, Beijing, China
| | - Milan Jia
- Department of Neurology, Xuanwu Hospital (M.J., X.C., Y.X., W.H., C.W., X.J.), Capital Medical University, Beijing, China
| | - Jiaqi Guo
- China-America Institute of Neuroscience, Xuanwu Hospital (S.X., J.G., J.H., X.C., Y.X., W.H., D.W., X.J.), Capital Medical University, Beijing, China
| | - Jiachen He
- China-America Institute of Neuroscience, Xuanwu Hospital (S.X., J.G., J.H., X.C., Y.X., W.H., D.W., X.J.), Capital Medical University, Beijing, China
| | - Xi Chen
- Department of Neurology, Xuanwu Hospital (M.J., X.C., Y.X., W.H., C.W., X.J.), Capital Medical University, Beijing, China
- China-America Institute of Neuroscience, Xuanwu Hospital (S.X., J.G., J.H., X.C., Y.X., W.H., D.W., X.J.), Capital Medical University, Beijing, China
| | - Yi Xu
- Department of Neurology, Xuanwu Hospital (M.J., X.C., Y.X., W.H., C.W., X.J.), Capital Medical University, Beijing, China
- China-America Institute of Neuroscience, Xuanwu Hospital (S.X., J.G., J.H., X.C., Y.X., W.H., D.W., X.J.), Capital Medical University, Beijing, China
| | - Wenbo Hu
- Department of Neurology, Xuanwu Hospital (M.J., X.C., Y.X., W.H., C.W., X.J.), Capital Medical University, Beijing, China
- China-America Institute of Neuroscience, Xuanwu Hospital (S.X., J.G., J.H., X.C., Y.X., W.H., D.W., X.J.), Capital Medical University, Beijing, China
| | - Di Wu
- China-America Institute of Neuroscience, Xuanwu Hospital (S.X., J.G., J.H., X.C., Y.X., W.H., D.W., X.J.), Capital Medical University, Beijing, China
| | - Chuanjie Wu
- Department of Neurology, Xuanwu Hospital (M.J., X.C., Y.X., W.H., C.W., X.J.), Capital Medical University, Beijing, China
| | - Xunming Ji
- Beijing Institute of Brain Disorders, Laboratory of Brain Disorders, Ministry of Science and Technology, Collaborative Innovation Center for Brain Disorders (S.X., X.J.), Capital Medical University, Beijing, China
- Department of Neurology, Xuanwu Hospital (M.J., X.C., Y.X., W.H., C.W., X.J.), Capital Medical University, Beijing, China
- China-America Institute of Neuroscience, Xuanwu Hospital (S.X., J.G., J.H., X.C., Y.X., W.H., D.W., X.J.), Capital Medical University, Beijing, China
- Department of Neurosurgery, Xuanwu Hospital (X.J.), Capital Medical University, Beijing, China
| |
Collapse
|
3
|
Bouteldja AA, Penichet D, Srivastava LK, Cermakian N. The circadian system: A neglected player in neurodevelopmental disorders. Eur J Neurosci 2024; 60:3858-3890. [PMID: 38816965 DOI: 10.1111/ejn.16423] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2024] [Revised: 04/18/2024] [Accepted: 05/07/2024] [Indexed: 06/01/2024]
Abstract
Patients with neurodevelopmental disorders, such as autism spectrum disorder, often display abnormal circadian rhythms. The role of the circadian system in these disorders has gained considerable attention over the last decades. Yet, it remains largely unknown how these disruptions occur and to what extent they contribute to the disorders' development. In this review, we examine circadian system dysregulation as observed in patients and animal models of neurodevelopmental disorders. Second, we explore whether circadian rhythm disruptions constitute a risk factor for neurodevelopmental disorders from studies in humans and model organisms. Lastly, we focus on the impact of psychiatric medications on circadian rhythms and the potential benefits of chronotherapy. The literature reveals that patients with neurodevelopmental disorders display altered sleep-wake cycles and melatonin rhythms/levels in a heterogeneous manner, and model organisms used to study these disorders appear to support that circadian dysfunction may be an inherent characteristic of neurodevelopmental disorders. Furthermore, the pre-clinical and clinical evidence indicates that circadian disruption at the environmental and genetic levels may contribute to the behavioural changes observed in these disorders. Finally, studies suggest that psychiatric medications, particularly those prescribed for attention-deficit/hyperactivity disorder and schizophrenia, can have direct effects on the circadian system and that chronotherapy may be leveraged to offset some of these side effects. This review highlights that circadian system dysfunction is likely a core pathological feature of neurodevelopmental disorders and that further research is required to elucidate this relationship.
Collapse
Affiliation(s)
- Ahmed A Bouteldja
- Douglas Mental Health University Institute, Montréal, Québec, Canada
- Integrated Program in Neuroscience, McGill University, Montréal, Québec, Canada
| | - Danae Penichet
- Douglas Mental Health University Institute, Montréal, Québec, Canada
- Integrated Program in Neuroscience, McGill University, Montréal, Québec, Canada
| | - Lalit K Srivastava
- Douglas Mental Health University Institute, Montréal, Québec, Canada
- Department of Psychiatry, McGill University, Montréal, Québec, Canada
| | - Nicolas Cermakian
- Douglas Mental Health University Institute, Montréal, Québec, Canada
- Department of Psychiatry, McGill University, Montréal, Québec, Canada
| |
Collapse
|
4
|
Carvalho Cabral P, Richard VR, Borchers CH, Olivier M, Cermakian N. Circadian Control of the Response of Macrophages to Plasmodium Spp.-Infected Red Blood Cells. Immunohorizons 2024; 8:442-456. [PMID: 38916585 PMCID: PMC11220744 DOI: 10.4049/immunohorizons.2400021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2024] [Accepted: 05/23/2024] [Indexed: 06/26/2024] Open
Abstract
Malaria is a serious vector-borne disease characterized by periodic episodes of high fever and strong immune responses that are coordinated with the daily synchronized parasite replication cycle inside RBCs. As immune cells harbor an autonomous circadian clock that controls various aspects of the immune response, we sought to determine whether the intensity of the immune response to Plasmodium spp., the parasite causing malaria, depends on time of infection. To do this, we developed a culture model in which mouse bone marrow-derived macrophages are stimulated with RBCs infected with Plasmodium berghei ANKA (iRBCs). Lysed iRBCs, but not intact iRBCs or uninfected RBCs, triggered an inflammatory immune response in bone marrow-derived macrophages. By stimulating at four different circadian time points (16, 22, 28, or 34 h postsynchronization of the cells' clock), 24-h rhythms in reactive oxygen species and cytokines/chemokines were found. Furthermore, the analysis of the macrophage proteome and phosphoproteome revealed global changes in response to iRBCs that varied according to circadian time. This included many proteins and signaling pathways known to be involved in the response to Plasmodium infection. In summary, our findings show that the circadian clock within macrophages determines the magnitude of the inflammatory response upon stimulation with ruptured iRBCs, along with changes of the cell proteome and phosphoproteome.
Collapse
Affiliation(s)
| | - Vincent R. Richard
- Lady Davis Institute for Medical Research, McGill University, Montreal, Quebec, Canada
| | - Christoph H. Borchers
- Lady Davis Institute for Medical Research, McGill University, Montreal, Quebec, Canada
| | - Martin Olivier
- Research Institute of the McGill University Health Centre, McGill University, Montreal, Quebec, Canada
| | - Nicolas Cermakian
- Douglas Research Centre, McGill University, Montreal, Quebec, Canada
| |
Collapse
|
5
|
Liang Z, Gong X, Zhao Y, Zhao Y, Yu J, Huang T, Yang C, Wu L, Huang M, Wang X, Shu X, Bao J. Long-Term High-Fat Diet Consumption Aggravates β-Amyloid Deposition and Tau Pathology Accompanied by Microglial Activation in an Alzheimer's Disease Model. Mol Nutr Food Res 2024; 68:e2300669. [PMID: 38491393 DOI: 10.1002/mnfr.202300669] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2023] [Revised: 01/15/2024] [Indexed: 03/18/2024]
Abstract
Alzheimer's disease (AD) is the most prevailing form of dementia, with long-term high-fat diet (HFD) consumption being a pivotal contributor to AD pathogenesis. As microglial dysfunction is a crucial factor in the AD onset, it becomes imperative to explore the effects of HFD on microglial function and AD pathogenesis. In the present study, 3xTg-AD model mice at the age of 9-month are subjected to random allocation, with one group receiving a standard diet (ND) and the other an HFD for 3 months. Subsequently, transcriptomic profiling of microglia unveils that HFD alters fatty acid metabolism and mediates T cell infiltration. Within the hippocampus, microglia exhibit aberrant morphology and lipid accretion in response to the HFD, evidenced by conspicuously enlarged microglial cell bodies and accumulation of lipid droplets. These lipid-droplet-accumulating microglia exhibit diminished migratory capacity and compromise plaque consolidation, thereby exacerbating the accumulation of β-amyloid. Noteworthy, the HFD induces T cell infiltration, thereby aggravating neuroinflammation and Tau phosphorylation. Morris water maze test reveals that HFD-consuming mice display marked impairment in memory performance. In summary, this study demonstrates that prolonged HFD consumption exacerbates amyloid deposition, tau pathology, and cognitive deficits, which is associated with the accumulation of lipid droplets within microglia.
Collapse
Affiliation(s)
- Zheng Liang
- Institutes of Biomedical Sciences, School of Medicine, Jianghan University, Wuhan, 430056, China
- Hubei Key Laboratory of Cognitive and Affective Disorders, School of Medicine, Jianghan University, Wuhan, 430056, China
| | - Xiaokang Gong
- Institutes of Biomedical Sciences, School of Medicine, Jianghan University, Wuhan, 430056, China
- Hubei Key Laboratory of Cognitive and Affective Disorders, School of Medicine, Jianghan University, Wuhan, 430056, China
| | - Yang Zhao
- Institutes of Biomedical Sciences, School of Medicine, Jianghan University, Wuhan, 430056, China
| | - Yanna Zhao
- Institutes of Biomedical Sciences, School of Medicine, Jianghan University, Wuhan, 430056, China
- Department of Pathology and Pathophysiology, School of Medicine, Jianghan University, Wuhan, 430056, China
- Department of Pathology, Zhoukou Central Hospital, Zhoukou, 466000, China
| | - Jing Yu
- Institutes of Biomedical Sciences, School of Medicine, Jianghan University, Wuhan, 430056, China
- Department of Pathology and Pathophysiology, School of Medicine, Jianghan University, Wuhan, 430056, China
- Department of Pathology, General Hospital of Ningxia Medical University, Ningxia, 750003, China
| | - Tiantian Huang
- Institutes of Biomedical Sciences, School of Medicine, Jianghan University, Wuhan, 430056, China
- Hubei Key Laboratory of Cognitive and Affective Disorders, School of Medicine, Jianghan University, Wuhan, 430056, China
- Department of Pathology and Pathophysiology, School of Medicine, Jianghan University, Wuhan, 430056, China
| | - Chaoqing Yang
- Institutes of Biomedical Sciences, School of Medicine, Jianghan University, Wuhan, 430056, China
- Hubei Key Laboratory of Cognitive and Affective Disorders, School of Medicine, Jianghan University, Wuhan, 430056, China
- Department of Pathology and Pathophysiology, School of Medicine, Jianghan University, Wuhan, 430056, China
| | - Liangwei Wu
- Institutes of Biomedical Sciences, School of Medicine, Jianghan University, Wuhan, 430056, China
- Hubei Key Laboratory of Cognitive and Affective Disorders, School of Medicine, Jianghan University, Wuhan, 430056, China
- Department of Pathology and Pathophysiology, School of Medicine, Jianghan University, Wuhan, 430056, China
| | - Mengbing Huang
- Institutes of Biomedical Sciences, School of Medicine, Jianghan University, Wuhan, 430056, China
- Hubei Key Laboratory of Cognitive and Affective Disorders, School of Medicine, Jianghan University, Wuhan, 430056, China
- Department of Pathology and Pathophysiology, School of Medicine, Jianghan University, Wuhan, 430056, China
| | - Xiaochuan Wang
- Department of Pathophysiology, School of Basic Medicine, Key Laboratory of Education Ministry of China for Neurological Disorders, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Xiji Shu
- Institutes of Biomedical Sciences, School of Medicine, Jianghan University, Wuhan, 430056, China
- Hubei Key Laboratory of Cognitive and Affective Disorders, School of Medicine, Jianghan University, Wuhan, 430056, China
- Department of Pathology and Pathophysiology, School of Medicine, Jianghan University, Wuhan, 430056, China
| | - Jian Bao
- Institutes of Biomedical Sciences, School of Medicine, Jianghan University, Wuhan, 430056, China
- Hubei Key Laboratory of Cognitive and Affective Disorders, School of Medicine, Jianghan University, Wuhan, 430056, China
- Department of Pathology and Pathophysiology, School of Medicine, Jianghan University, Wuhan, 430056, China
| |
Collapse
|
6
|
Li W, Tiedt S, Lawrence JH, Harrington ME, Musiek ES, Lo EH. Circadian Biology and the Neurovascular Unit. Circ Res 2024; 134:748-769. [PMID: 38484026 DOI: 10.1161/circresaha.124.323514] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/10/2024] [Accepted: 02/14/2024] [Indexed: 03/19/2024]
Abstract
Mammalian physiology and cellular function are subject to significant oscillations over the course of every 24-hour day. It is likely that these daily rhythms will affect function as well as mechanisms of disease in the central nervous system. In this review, we attempt to survey and synthesize emerging studies that investigate how circadian biology may influence the neurovascular unit. We examine how circadian clocks may operate in neural, glial, and vascular compartments, review how circadian mechanisms regulate cell-cell signaling, assess interactions with aging and vascular comorbidities, and finally ask whether and how circadian effects and disruptions in rhythms may influence the risk and progression of pathophysiology in cerebrovascular disease. Overcoming identified challenges and leveraging opportunities for future research might support the development of novel circadian-based treatments for stroke.
Collapse
Affiliation(s)
- Wenlu Li
- Neuroprotection Research Laboratories, Departments of Radiology and Neurology, Massachusetts General Hospital, Harvard Medical School, Boston (W.L., E.H.L.)
- Consortium International pour la Recherche Circadienne sur l'AVC, Munich, Germany (W.L., S.T., J.H.L., M.E.H., E.S.M., E.H.L.)
| | - Steffen Tiedt
- Consortium International pour la Recherche Circadienne sur l'AVC, Munich, Germany (W.L., S.T., J.H.L., M.E.H., E.S.M., E.H.L.)
- Institute for Stroke and Dementia Research, University Hospital, Ludwig-Maximilians-Universität München, Munich, Germany (S.T.)
| | - Jennifer H Lawrence
- Consortium International pour la Recherche Circadienne sur l'AVC, Munich, Germany (W.L., S.T., J.H.L., M.E.H., E.S.M., E.H.L.)
- Department of Neurology, Washington University School of Medicine, St. Louis, MO (J.H.L., E.S.M.)
| | - Mary E Harrington
- Consortium International pour la Recherche Circadienne sur l'AVC, Munich, Germany (W.L., S.T., J.H.L., M.E.H., E.S.M., E.H.L.)
- Neuroscience Program, Smith College, Northampton, MA (M.E.H.)
| | - Erik S Musiek
- Consortium International pour la Recherche Circadienne sur l'AVC, Munich, Germany (W.L., S.T., J.H.L., M.E.H., E.S.M., E.H.L.)
- Department of Neurology, Washington University School of Medicine, St. Louis, MO (J.H.L., E.S.M.)
| | - Eng H Lo
- Neuroprotection Research Laboratories, Departments of Radiology and Neurology, Massachusetts General Hospital, Harvard Medical School, Boston (W.L., E.H.L.)
- Consortium International pour la Recherche Circadienne sur l'AVC, Munich, Germany (W.L., S.T., J.H.L., M.E.H., E.S.M., E.H.L.)
| |
Collapse
|
7
|
Kou L, Chi X, Sun Y, Yin S, Wu J, Zou W, Wang Y, Jin Z, Huang J, Xiong N, Xia Y, Wang T. Circadian regulation of microglia function: Potential targets for treatment of Parkinson's Disease. Ageing Res Rev 2024; 95:102232. [PMID: 38364915 DOI: 10.1016/j.arr.2024.102232] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2023] [Revised: 02/11/2024] [Accepted: 02/11/2024] [Indexed: 02/18/2024]
Abstract
Circadian rhythms are involved in the regulation of many aspects of the body, including cell function, physical activity and disease. Circadian disturbance often predates the typical symptoms of neurodegenerative diseases and is not only a non-motor symptom, but also one of the causes of their occurrence and progression. Glial cells possess circadian clocks that regulate their function to maintain brain development and homeostasis. Emerging evidence suggests that the microglial circadian clock is involved in the regulation of many physiological processes, such as cytokine release, phagocytosis, and nutritional and metabolic support, and that disruption of the microglia clock may affect multiple aspects of Parkinson's disease, especially neuroinflammation and α-synuclein processes. Herein, we review recent advances in the circadian control of microglia function in health and disease, and discuss novel pharmacological interventions for microglial clocks in neurodegenerative disorders.
Collapse
Affiliation(s)
- Liang Kou
- Department of Neurology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China
| | - Xiaosa Chi
- Department of Neurology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China
| | - Yadi Sun
- Department of Neurology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China
| | - Sijia Yin
- Department of Neurology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China
| | - Jiawei Wu
- Department of Neurology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China
| | - Wenkai Zou
- Department of Neurology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China
| | - Yiming Wang
- Department of Neurology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China
| | - Zongjie Jin
- Department of Neurology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China
| | - Jinsha Huang
- Department of Neurology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China
| | - Nian Xiong
- Department of Neurology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China
| | - Yun Xia
- Department of Neurology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China.
| | - Tao Wang
- Department of Neurology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China.
| |
Collapse
|
8
|
Wang W, Li J, Cui S, Li J, Ye X, Wang Z, Zhang T, Jiang X, Kong Y, Chen X, Chen YQ, Zhu S. Microglial Ffar4 deficiency promotes cognitive impairment in the context of metabolic syndrome. SCIENCE ADVANCES 2024; 10:eadj7813. [PMID: 38306420 PMCID: PMC10836723 DOI: 10.1126/sciadv.adj7813] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2023] [Accepted: 01/03/2024] [Indexed: 02/04/2024]
Abstract
Metabolic syndrome (MetS) is closely associated with an increased risk of dementia and cognitive impairment, and a complex interaction of genetic and environmental dietary factors may be implicated. Free fatty acid receptor 4 (Ffar4) may bridge the genetic and dietary aspects of MetS development. However, the role of Ffar4 in MetS-related cognitive dysfunction is unclear. In this study, we found that Ffar4 expression is down-regulated in MetS mice and MetS patients with cognitive impairment. Conventional and microglial conditional knockout of Ffar4 exacerbated high-fat diet (HFD)-induced cognitive dysfunction and anxiety, whereas microglial Ffar4 overexpression improved HFD-induced cognitive dysfunction and anxiety. Mechanistically, we found that microglial Ffar4 regulated microglial activation through type I interferon signaling. Microglial depletion and NF-κB inhibition partially reversed cognitive dysfunction and anxiety in microglia-specific Ffar4 knockout MetS mice. Together, these findings uncover a previously unappreciated role of Ffar4 in negatively regulating the NF-κB-IFN-β signaling and provide an attractive therapeutic target for delaying MetS-associated cognitive decline.
Collapse
Affiliation(s)
- Wei Wang
- Wuxi School of Medicine, Jiangnan University, Wuxi 214000, China
| | - Jinyou Li
- Affiliated Hospital of Jiangnan University, Wuxi 214122, China
| | - Siyuan Cui
- Jiangnan University Medical Center, Wuxi 214002, China
| | - Jiayu Li
- Wuxi School of Medicine, Jiangnan University, Wuxi 214000, China
| | - Xianlong Ye
- Ganjiang Chinese Medicine Innovation Center, Nanchang 330000, China
| | - Zhe Wang
- Wuxi School of Medicine, Jiangnan University, Wuxi 214000, China
| | - Tingting Zhang
- Wuxi School of Medicine, Jiangnan University, Wuxi 214000, China
| | - Xuan Jiang
- Wuxi School of Medicine, Jiangnan University, Wuxi 214000, China
| | - Yulin Kong
- Wuxi School of Medicine, Jiangnan University, Wuxi 214000, China
| | - Xin Chen
- Jiangnan University Medical Center, Wuxi 214002, China
| | - Yong Q. Chen
- Wuxi School of Medicine, Jiangnan University, Wuxi 214000, China
| | - Shenglong Zhu
- Wuxi School of Medicine, Jiangnan University, Wuxi 214000, China
- Jiangnan University Medical Center, Wuxi 214002, China
| |
Collapse
|
9
|
Salvi J, Andreoletti P, Audinat E, Balland E, Ben Fradj S, Cherkaoui-Malki M, Heurtaux T, Liénard F, Nédélec E, Rovère C, Savary S, Véjux A, Trompier D, Benani A. Microgliosis: a double-edged sword in the control of food intake. FEBS J 2024; 291:615-631. [PMID: 35880408 DOI: 10.1111/febs.16583] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2022] [Revised: 06/30/2022] [Accepted: 07/25/2022] [Indexed: 02/16/2024]
Abstract
Maintaining energy balance is essential for survival and health. This physiological function is controlled by the brain, which adapts food intake to energy needs. Indeed, the brain constantly receives a multitude of biological signals that are derived from digested foods or that originate from the gastrointestinal tract, energy stores (liver and adipose tissues) and other metabolically active organs (muscles). These signals, which include circulating nutrients, hormones and neuronal inputs from the periphery, collectively provide information on the overall energy status of the body. In the brain, several neuronal populations can specifically detect these signals. Nutrient-sensing neurons are found in discrete brain areas and are highly enriched in the hypothalamus. In turn, specialized brain circuits coordinate homeostatic responses acting mainly on appetite, peripheral metabolism, activity and arousal. Accumulating evidence shows that hypothalamic microglial cells located at the vicinity of these circuits can influence the brain control of energy balance. However, microglial cells could have opposite effects on energy balance, that is homeostatic or detrimental, and the conditions for this shift are not totally understood yet. One hypothesis relies on the extent of microglial activation, and nutritional lipids can considerably change it.
Collapse
Affiliation(s)
- Juliette Salvi
- CSGA, Centre des Sciences du Goût et de l'Alimentation, CNRS, INRAE, Institut Agro Dijon, Université Bourgogne Franche-Comté, Dijon, France
| | - Pierre Andreoletti
- Laboratoire Bio-PeroxIL, Université Bourgogne Franche-Comté, Dijon, France
| | - Etienne Audinat
- IGF, Université de Montpellier, CNRS, Inserm, Montpellier, France
| | - Eglantine Balland
- Department of Nutrition, Dietetics and Food, School of Clinical Sciences at Monash Health, Faculty of Medicine, Nursing and Health Sciences, Monash University, Notting Hill, Australia
| | - Selma Ben Fradj
- IPMC, Institut de Pharmacologie Moléculaire et Cellulaire, CNRS, Université Côte d'Azur, Valbonne, France
| | | | - Tony Heurtaux
- Luxembourg Center of Neuropathology (LCNP), Dudelange, Luxembourg
- Department of Life Sciences and Medicine, University of Luxembourg, Belvaux, Luxembourg
| | - Fabienne Liénard
- CSGA, Centre des Sciences du Goût et de l'Alimentation, CNRS, INRAE, Institut Agro Dijon, Université Bourgogne Franche-Comté, Dijon, France
| | - Emmanuelle Nédélec
- CSGA, Centre des Sciences du Goût et de l'Alimentation, CNRS, INRAE, Institut Agro Dijon, Université Bourgogne Franche-Comté, Dijon, France
| | - Carole Rovère
- IPMC, Institut de Pharmacologie Moléculaire et Cellulaire, CNRS, Université Côte d'Azur, Valbonne, France
| | - Stéphane Savary
- Laboratoire Bio-PeroxIL, Université Bourgogne Franche-Comté, Dijon, France
| | - Anne Véjux
- Laboratoire Bio-PeroxIL, Université Bourgogne Franche-Comté, Dijon, France
| | - Doriane Trompier
- Laboratoire Bio-PeroxIL, Université Bourgogne Franche-Comté, Dijon, France
| | - Alexandre Benani
- CSGA, Centre des Sciences du Goût et de l'Alimentation, CNRS, INRAE, Institut Agro Dijon, Université Bourgogne Franche-Comté, Dijon, France
| |
Collapse
|
10
|
Wen L, Bi D, Shen Y. Complement-mediated synapse loss in Alzheimer's disease: mechanisms and involvement of risk factors. Trends Neurosci 2024; 47:135-149. [PMID: 38129195 DOI: 10.1016/j.tins.2023.11.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2023] [Revised: 10/25/2023] [Accepted: 11/27/2023] [Indexed: 12/23/2023]
Abstract
The complement system is increasingly recognized as a key player in the synapse loss and cognitive impairments observed in Alzheimer's disease (AD). In particular, the process of complement-dependent synaptic pruning through phagocytosis is over-activated in AD brains, driving detrimental excessive synapse elimination and contributing to synapse loss, which is the strongest neurobiological correlate of cognitive impairments in AD. Herein we review recent advances in characterizing complement-mediated synapse loss in AD, summarize the underlying mechanisms, and discuss the possible involvement of AD risk factors such as aging and various risk genes. We conclude with an overview of key questions that remain to be addressed.
Collapse
Affiliation(s)
- Lang Wen
- Department of Neurology and Institute on Aging and Brain Disorders, The First Affiliated Hospital of USTC, Neurodegenerative Disease Research Center, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, 230026, China
| | - Danlei Bi
- Department of Neurology and Institute on Aging and Brain Disorders, The First Affiliated Hospital of USTC, Neurodegenerative Disease Research Center, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, 230026, China; Anhui Province Key Laboratory of Biomedical Aging Research, University of Science and Technology of China, Hefei, 230026, China; Institute of Artificial Intelligence, Hefei Comprehensive National Science Center, Hefei, 230026, China; CAS Key Laboratory of Brain Function and Disease, School of Life Sciences, University of Science and Technology of China, Hefei, 230026, China; Center for Excellence in Brain Science and Intelligence Technology, Chinese Academy of Sciences, Shanghai, 200031, China.
| | - Yong Shen
- Department of Neurology and Institute on Aging and Brain Disorders, The First Affiliated Hospital of USTC, Neurodegenerative Disease Research Center, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, 230026, China; Anhui Province Key Laboratory of Biomedical Aging Research, University of Science and Technology of China, Hefei, 230026, China; CAS Key Laboratory of Brain Function and Disease, School of Life Sciences, University of Science and Technology of China, Hefei, 230026, China; Center for Excellence in Brain Science and Intelligence Technology, Chinese Academy of Sciences, Shanghai, 200031, China.
| |
Collapse
|
11
|
Zou C, Yang T, Zhang J, Chen X, Zhao J, Wu D, Yang C, Liu P, Huang X, Liu J, Xu B. A quantitative proteomic study reveals oxidative stress and synapse-related proteins contributed to TDCIPP exposure induced neurotoxicity. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2024; 271:116005. [PMID: 38262093 DOI: 10.1016/j.ecoenv.2024.116005] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/10/2023] [Revised: 01/17/2024] [Accepted: 01/19/2024] [Indexed: 01/25/2024]
Abstract
Tris(1,3-dichloro-2-propyl) phosphate (TDCIPP) has been consistently identified in various environmental media and biological specimens. Current understanding of the in vivo toxicities of TDCIPP is limited, especially for potential for neurotoxic and cognitive impairment effects. To better evaluate the potential adverse effect of the chemical on learning and memory, Sprague Dawley (SD) rats were administered TDCIPP via gavage at doses of 40, 120, and 360 mg/kg/day for a period of 90 days. Quantitative proteomic analysis, immunohistochemistry, and Western blotting were employed to assess alterations in proteins following exposure to TDCIPP. An open field test and the Morris Water Maze were used to assess anxiety and spatial learning memory capacity. Administration of TDCIPP induced anxiety and cognitive impairments in rats. Additionally, a noteworthy decrease in the number of neurons was observed in the hippocampal CA3 and dentate gyrus (DG) regions. Proteomic and bioinformatic analyses revealed dysregulation of numerous hippocampal proteins, particularly those associated with synapses (PKN1) or oxidative stress (GSTM4, NQO1, and BMAL1), which was further confirmed by Western blot analysis. In sum, the cognitive impairment of rats caused by TDCIPP exposure was associated with dysregulation of synaptic and oxidative stress-related proteins.
Collapse
Affiliation(s)
- Chunli Zou
- Shenzhen Key Laboratory of Modern Toxicology, Shenzhen Medical Key Discipline of Health Toxicology (2020-2024), Shenzhen Center for Disease Control and Prevention, Shenzhen 518000, China; College of Public Health, Zunyi Medical University, Zunyi 563000, China
| | - Tingting Yang
- Shenzhen Key Laboratory of Modern Toxicology, Shenzhen Medical Key Discipline of Health Toxicology (2020-2024), Shenzhen Center for Disease Control and Prevention, Shenzhen 518000, China; College of Public Health, Zunyi Medical University, Zunyi 563000, China
| | - Jiuhong Zhang
- Shenzhen Key Laboratory of Modern Toxicology, Shenzhen Medical Key Discipline of Health Toxicology (2020-2024), Shenzhen Center for Disease Control and Prevention, Shenzhen 518000, China
| | - Xiao Chen
- Shenzhen Key Laboratory of Modern Toxicology, Shenzhen Medical Key Discipline of Health Toxicology (2020-2024), Shenzhen Center for Disease Control and Prevention, Shenzhen 518000, China
| | - Jing Zhao
- Shenzhen Key Laboratory of Modern Toxicology, Shenzhen Medical Key Discipline of Health Toxicology (2020-2024), Shenzhen Center for Disease Control and Prevention, Shenzhen 518000, China
| | - Desheng Wu
- Shenzhen Key Laboratory of Modern Toxicology, Shenzhen Medical Key Discipline of Health Toxicology (2020-2024), Shenzhen Center for Disease Control and Prevention, Shenzhen 518000, China
| | - Chen Yang
- Shenzhen Key Laboratory of Modern Toxicology, Shenzhen Medical Key Discipline of Health Toxicology (2020-2024), Shenzhen Center for Disease Control and Prevention, Shenzhen 518000, China
| | - Peiyi Liu
- Shenzhen Key Laboratory of Modern Toxicology, Shenzhen Medical Key Discipline of Health Toxicology (2020-2024), Shenzhen Center for Disease Control and Prevention, Shenzhen 518000, China
| | - Xinfeng Huang
- Shenzhen Key Laboratory of Modern Toxicology, Shenzhen Medical Key Discipline of Health Toxicology (2020-2024), Shenzhen Center for Disease Control and Prevention, Shenzhen 518000, China
| | - Jianjun Liu
- Shenzhen Key Laboratory of Modern Toxicology, Shenzhen Medical Key Discipline of Health Toxicology (2020-2024), Shenzhen Center for Disease Control and Prevention, Shenzhen 518000, China.
| | - Benhong Xu
- Shenzhen Key Laboratory of Modern Toxicology, Shenzhen Medical Key Discipline of Health Toxicology (2020-2024), Shenzhen Center for Disease Control and Prevention, Shenzhen 518000, China.
| |
Collapse
|
12
|
Zhan M, Liu X, Xia X, Yang Y, Xie Y, Zhang L, Lin C, Zhu J, Ding W, Xu S. Promotion of neuroinflammation by the glymphatic system: a new insight into ethanol extracts from Alisma orientale in alleviating obesity-associated cognitive impairment. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2024; 122:155147. [PMID: 37864890 DOI: 10.1016/j.phymed.2023.155147] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/27/2023] [Revised: 09/20/2023] [Accepted: 10/12/2023] [Indexed: 10/23/2023]
Abstract
BACKGROUND Obesity is one of the critical risk factors for cognitive dysfunction. The glymphatic system (GS) plays a key role in the pathogenesis of cognitive deficits. Alisma orientale has been shown to have anti-inflammatory and antihyperlipidemic effects, whereas its effects and underlying mechanisms on obesity-associated cognitive impairment (OACI) are unclear. PURPOSE This work aims to decipher the mechanism of ethanol extracts from Alisma orientale (EEAO) in restoring cognitive impairment in HFD-induced obese mice through a GS approach. METHODS The restoration of abnormal glucose/lipid metabolism and excess adipose deposition by EEAO were assayed by biochemical analysis and visually displayed by a micro-CT scanner and Oil Red O staining. Biochemical assays and Western blotting (WB) were used to measure cerebral blood flow (CBF), free fatty acid (FFAs) levels and the structural integrity of the blood-brain barrier (BBB). Microglial activation and neuroinflammation were assessed with immunohistochemistry staining, ELISA and WB. Moreover, GS function was determined by immunofluorescence staining, fluorescence tracer imaging and WB. Finally, the neuropathological features and cognitive functions were detested with immunohistochemistry staining, immunofluorescence and Morris Water Maze. RESULTS EEAO not only alleviated body weight, cerebral lipid accumulation and serum FFAs in HFD-induced obese mice, but also increased CBF and BBB integrity. EEAO suppressed microglial activation and lipid deposition in the hippocampus and reduced the level of inflammatory cytokines including IL-6, IL-1β and TNF-α in brain tissue. Interestingly, long-term HFD-induced GS dysfunction was significantly restored after EEAO intervention, and neuropathological lesions and cognitive deficits were also markedly rescued. CONCLUSION EEAO rescued the cognitive deficits of OACI by inhibiting neuroinflammation and restoring GS dysfunction, indicating a potential remedy for OACI.
Collapse
Affiliation(s)
- Meng Zhan
- State Key Laboratory of Southwestern Chinese Medicine Resources, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China; Institute of Material Medica Integration and Transformation for Brain Disorders, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China
| | - Xiao Liu
- State Key Laboratory of Southwestern Chinese Medicine Resources, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China; Institute of Material Medica Integration and Transformation for Brain Disorders, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China
| | - Xiuwen Xia
- School of Basic Medical Sciences, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China
| | - Youjun Yang
- School of Basic Medical Sciences, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China
| | - Ya Xie
- School of Basic Medical Sciences, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China
| | - Lu Zhang
- School of Basic Medical Sciences, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China
| | - Chunqiao Lin
- School of Basic Medical Sciences, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China
| | - Jiushuang Zhu
- School of Basic Medical Sciences, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China
| | - Weijun Ding
- School of Basic Medical Sciences, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China.
| | - Shijun Xu
- State Key Laboratory of Southwestern Chinese Medicine Resources, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China; Institute of Material Medica Integration and Transformation for Brain Disorders, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China.
| |
Collapse
|
13
|
Kim JD, Copperi F, Diano S. Microglia in Central Control of Metabolism. Physiology (Bethesda) 2024; 39:0. [PMID: 37962895 PMCID: PMC11283896 DOI: 10.1152/physiol.00021.2023] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2023] [Revised: 11/12/2023] [Accepted: 11/12/2023] [Indexed: 11/15/2023] Open
Abstract
Beyond their role as brain immune cells, microglia act as metabolic sensors in response to changes in nutrient availability, thus playing a role in energy homeostasis. This review highlights the evidence and challenges of studying the role of microglia in metabolism regulation.
Collapse
Affiliation(s)
- Jung Dae Kim
- Institute of Human Nutrition, Columbia University Irving Medical Center, New York, New York, United States
| | - Francesca Copperi
- Institute of Human Nutrition, Columbia University Irving Medical Center, New York, New York, United States
| | - Sabrina Diano
- Institute of Human Nutrition, Columbia University Irving Medical Center, New York, New York, United States
- Department of Molecular Pharmacology and Therapeutics, Columbia University Irving Medical Center, New York, New York, United States
- Department of Physiology and Cellular Biophysics, Columbia University Irving Medical Center, New York, New York, United States
| |
Collapse
|
14
|
Halawani D, Wang Y, Ramakrishnan A, Estill M, He X, Shen L, Friedel RH, Zou H. Circadian clock regulator Bmal1 gates axon regeneration via Tet3 epigenetics in mouse sensory neurons. Nat Commun 2023; 14:5165. [PMID: 37620297 PMCID: PMC10449865 DOI: 10.1038/s41467-023-40816-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2022] [Accepted: 08/11/2023] [Indexed: 08/26/2023] Open
Abstract
Axon regeneration of dorsal root ganglia (DRG) neurons after peripheral axotomy involves reconfiguration of gene regulatory circuits to establish regenerative gene programs. However, the underlying mechanisms remain unclear. Here, through an unbiased survey, we show that the binding motif of Bmal1, a central transcription factor of the circadian clock, is enriched in differentially hydroxymethylated regions (DhMRs) of mouse DRG after peripheral lesion. By applying conditional deletion of Bmal1 in neurons, in vitro and in vivo neurite outgrowth assays, as well as transcriptomic profiling, we demonstrate that Bmal1 inhibits axon regeneration, in part through a functional link with the epigenetic factor Tet3. Mechanistically, we reveal that Bmal1 acts as a gatekeeper of neuroepigenetic responses to axonal injury by limiting Tet3 expression and restricting 5hmC modifications. Bmal1-regulated genes not only concern axon growth, but also stress responses and energy homeostasis. Furthermore, we uncover an epigenetic rhythm of diurnal oscillation of Tet3 and 5hmC levels in DRG neurons, corresponding to time-of-day effect on axon growth potential. Collectively, our studies demonstrate that targeting Bmal1 enhances axon regeneration.
Collapse
Affiliation(s)
- Dalia Halawani
- Nash Family Department of Neuroscience, Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Yiqun Wang
- Nash Family Department of Neuroscience, Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA
- Department of Orthopedics, Second Affiliated Hospital of Xi'an Jiaotong University, Shaanxi, China
| | - Aarthi Ramakrishnan
- Nash Family Department of Neuroscience, Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Molly Estill
- Nash Family Department of Neuroscience, Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Xijing He
- Department of Orthopedics, Second Affiliated Hospital of Xi'an Jiaotong University, Shaanxi, China
- Department of Orthopedics, Xi'an International Medical Center Hospital, Xi'an, China
| | - Li Shen
- Nash Family Department of Neuroscience, Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Roland H Friedel
- Nash Family Department of Neuroscience, Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA
- Department of Neurosurgery, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Hongyan Zou
- Nash Family Department of Neuroscience, Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA.
- Department of Neurosurgery, Icahn School of Medicine at Mount Sinai, New York, NY, USA.
| |
Collapse
|
15
|
Lear CA, Maeda Y, King VJ, Dhillon SK, Beacom MJ, Gunning MI, Lear BA, Davidson JO, Stone PR, Ikeda T, Gunn AJ, Bennet L. Circadian patterns of heart rate variability in fetal sheep after hypoxia-ischaemia: A biomarker of evolving brain injury. J Physiol 2023. [PMID: 37432936 DOI: 10.1113/jp284560] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2023] [Accepted: 06/23/2023] [Indexed: 07/13/2023] Open
Abstract
Hypoxia-ischaemia (HI) before birth is a key risk factor for stillbirth and severe neurodevelopmental disability in survivors, including cerebral palsy, although there are no reliable biomarkers to detect at risk fetuses that may have suffered a transient period of severe HI. We investigated time and frequency domain measures of fetal heart rate variability (FHRV) for 3 weeks after HI in preterm fetal sheep at 0.7 gestation (equivalent to preterm humans) until 0.8 gestation (equivalent to term humans). We have previously shown that this is associated with delayed development of severe white and grey matter injury, including cystic white matter injury (WMI) resembling that observed in human preterm infants. HI was associated with suppression of time and frequency domain measures of FHRV and reduced their circadian rhythmicity during the first 3 days of recovery. By contrast, circadian rhythms of multiple measures of FHRV were exaggerated over the final 2 weeks of recovery, mediated by a greater reduction in FHRV during the morning nadir, but no change in the evening peak. These data suggest that the time of day at which FHRV measurements are taken affects their diagnostic utility. We further propose that circadian changes in FHRV may be a low-cost, easily applied biomarker of antenatal HI and evolving brain injury. KEY POINTS: Hypoxia-ischaemia (HI) before birth is a key risk factor for stillbirth and probably for disability in survivors, although there are no reliable biomarkers for antenatal brain injury. In preterm fetal sheep, acute HI that is known to lead to delayed development of severe white and grey matter injury over 3 weeks, was associated with early suppression of multiple time and frequency domain measures of fetal heart rate variability (FHRV) and loss of their circadian rhythms during the first 3 days after HI. Over the final 2 weeks of recovery after HI, exaggerated circadian rhythms of frequency domain FHRV measures were observed. The morning nadirs were lower with no change in the evening peak of FHRV. Circadian changes in FHRV may be a low-cost, easily applied biomarker of antenatal HI and evolving brain injury.
Collapse
Affiliation(s)
- Christopher A Lear
- Department of Physiology, Fetal Physiology and Neuroscience Group, The University of Auckland, Auckland, New Zealand
| | - Yoshiki Maeda
- Department of Physiology, Fetal Physiology and Neuroscience Group, The University of Auckland, Auckland, New Zealand
- The Department of Obstetrics and Gynaecology, Mie University, Mie, Japan
| | - Victoria J King
- Department of Physiology, Fetal Physiology and Neuroscience Group, The University of Auckland, Auckland, New Zealand
| | - Simerdeep K Dhillon
- Department of Physiology, Fetal Physiology and Neuroscience Group, The University of Auckland, Auckland, New Zealand
| | - Michael J Beacom
- Department of Physiology, Fetal Physiology and Neuroscience Group, The University of Auckland, Auckland, New Zealand
| | - Mark I Gunning
- Department of Physiology, Fetal Physiology and Neuroscience Group, The University of Auckland, Auckland, New Zealand
| | - Benjamin A Lear
- Department of Physiology, Fetal Physiology and Neuroscience Group, The University of Auckland, Auckland, New Zealand
| | - Joanne O Davidson
- Department of Physiology, Fetal Physiology and Neuroscience Group, The University of Auckland, Auckland, New Zealand
| | - Peter R Stone
- The Department of Obstetrics and Gynaecology, The University of Auckland, Auckland, New Zealand
| | - Tomoaki Ikeda
- The Department of Obstetrics and Gynaecology, Mie University, Mie, Japan
| | - Alistair J Gunn
- Department of Physiology, Fetal Physiology and Neuroscience Group, The University of Auckland, Auckland, New Zealand
| | - Laura Bennet
- Department of Physiology, Fetal Physiology and Neuroscience Group, The University of Auckland, Auckland, New Zealand
| |
Collapse
|
16
|
McKee CA, Polino AJ, King MW, Musiek ES. Circadian clock protein BMAL1 broadly influences autophagy and endolysosomal function in astrocytes. Proc Natl Acad Sci U S A 2023; 120:e2220551120. [PMID: 37155839 PMCID: PMC10194014 DOI: 10.1073/pnas.2220551120] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2022] [Accepted: 04/12/2023] [Indexed: 05/10/2023] Open
Abstract
An emerging role for the circadian clock in autophagy and lysosome function has opened new avenues for exploration in the field of neurodegeneration. The daily rhythms of circadian clock proteins may coordinate gene expression programs involved not only in daily rhythms but in many cellular processes. In the brain, astrocytes are critical for sensing and responding to extracellular cues to support neurons. The core clock protein BMAL1 serves as the primary positive circadian transcriptional regulator and its depletion in astrocytes not only disrupts circadian function but also leads to a unique cell-autonomous activation phenotype. We report here that astrocyte-specific deletion of Bmal1 influences endolysosome function, autophagy, and protein degradation dynamics. In vitro, Bmal1-deficient astrocytes exhibit increased endocytosis, lysosome-dependent protein cleavage, and accumulation of LAMP1- and RAB7-positive organelles. In vivo, astrocyte-specific Bmal1 knockout (aKO) brains show accumulation of autophagosome-like structures within astrocytes by electron microscopy. Transcriptional analysis of isolated astrocytes from young and aged Bmal1 aKO mice indicates broad dysregulation of pathways involved in lysosome function which occur independently of TFEB activation. Since a clear link has been established between neurodegeneration and endolysosome dysfunction over the course of aging, this work implicates BMAL1 as a key regulator of these crucial astrocyte functions in health and disease.
Collapse
Affiliation(s)
- Celia A. McKee
- Department of Neurology, Washington University School of Medicine in St. Louis, St. Louis, MO63110
- Center on Biological Rhythms and Sleep, Washington University School of Medicine in St. Louis, St. Louis, MO63110
| | - Alexander J. Polino
- Department of Cell Biology and Physiology, Washington University School of Medicine in St. Louis, St. Louis, MO63110
| | - Melvin W. King
- Department of Neurology, Washington University School of Medicine in St. Louis, St. Louis, MO63110
- Center on Biological Rhythms and Sleep, Washington University School of Medicine in St. Louis, St. Louis, MO63110
| | - Erik S. Musiek
- Department of Neurology, Washington University School of Medicine in St. Louis, St. Louis, MO63110
- Center on Biological Rhythms and Sleep, Washington University School of Medicine in St. Louis, St. Louis, MO63110
| |
Collapse
|
17
|
Sun Y, Che J, Zhang J. Emerging non-proinflammatory roles of microglia in healthy and diseased brains. Brain Res Bull 2023; 199:110664. [PMID: 37192719 DOI: 10.1016/j.brainresbull.2023.110664] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2022] [Revised: 04/04/2023] [Accepted: 05/13/2023] [Indexed: 05/18/2023]
Abstract
Microglia, the resident myeloid cells of the central nervous system, are the first line of defense against foreign pathogens, thereby confining the extent of brain injury. However, the role of microglia is not limited to macrophage-like functions. In addition to proinflammatory response mediation, microglia are involved in neurodevelopmental remodeling and homeostatic maintenance in the absence of disease. An increasing number of studies have also elucidated microglia-mediated regulation of tumor growth and neural repair in diseased brains. Here, we review the non-proinflammatory roles of microglia, with the aim of promoting a deeper understanding of the functions of microglia in healthy and diseased brains and contributing to the development of novel therapeutics that target microglia in neurological disorders.
Collapse
Affiliation(s)
- Yinying Sun
- Department of Anesthesiology, Fudan University Shanghai Cancer Center, 200032, Shanghai China.
| | - Ji Che
- Department of Anesthesiology, Fudan University Shanghai Cancer Center, 200032, Shanghai China.
| | - Jun Zhang
- Department of Anesthesiology, Fudan University Shanghai Cancer Center, 200032, Shanghai China; Department of Oncology, Shanghai Medical College, Fudan University, 200032, Shanghai China.
| |
Collapse
|
18
|
Muscat SM, Butler MJ, Mackey-Alfonso SE, Barrientos RM. Young adult and aged female rats are vulnerable to amygdala-dependent, but not hippocampus-dependent, memory impairment following short-term high-fat diet. Brain Res Bull 2023; 195:145-156. [PMID: 36870621 PMCID: PMC10257807 DOI: 10.1016/j.brainresbull.2023.03.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2022] [Revised: 02/18/2023] [Accepted: 03/01/2023] [Indexed: 03/06/2023]
Abstract
Global populations are increasingly consuming diets high in saturated fats and refined carbohydrates, and such diets have been well-associated with heightened inflammation and neurological dysfunction. Notably, older individuals are particularly vulnerable to the impact of unhealthy diet on cognition, even after a single meal, and pre-clinical rodent studies have demonstrated that short-term consumption of high-fat diet (HFD) induces marked increases in neuroinflammation and cognitive impairment. Unfortunately though, to date, most studies on the topic of nutrition and cognition, especially in aging, have been performed only in male rodents. This is especially concerning given that older females are more vulnerable to develop certain memory deficits and/or severe memory-related pathologies than males. Thus, the aim of the present study was to determine the extent to which short-term HFD consumption impacts memory function and neuroinflammation in female rats. Young adult (3 months) and aged (20-22 months) female rats were fed HFD for 3 days. Using contextual fear conditioning, we found that HFD had no effect on long-term contextual memory (hippocampus-dependent) at either age, but impaired long-term auditory-cued memory (amygdala-dependent) regardless of age. Gene expression of Il-1β was markedly dysregulated in the amygdala, but not hippocampus, of both young and aged rats after 3 days of HFD. Interestingly, modulation of IL-1 signaling via central administration of the IL-1 receptor antagonist (which we have previously demonstrated to be protective in males) had no impact on memory function following the HFD in females. Investigation of the memory-associated gene Pacap and its receptor Pac1r revealed differential effects of HFD on their expression in the hippocampus and amygdala. Specifically, HFD induced increased expression of Pacap and Pac1r in the hippocampus, whereas decreased Pacap was observed in the amygdala. Collectively, these data suggest that both young adult and aged female rats are vulnerable to amygdala-dependent (but not hippocampus-dependent) memory impairments following short-term HFD consumption, and identify potential mechanisms related to IL-1β and PACAP signaling in these differential effects. Notably, these findings are strikingly different than those previously reported in male rats using the same diet regimen and behavioral paradigms, and highlight the importance of examining potential sex differences in the context of neuroimmune-associated cognitive dysfunction.
Collapse
Affiliation(s)
- Stephanie M Muscat
- Institute for Behavioral Medicine Research, The Ohio State University, Columbus, OH, USA; Biomedical Sciences Graduate Program, The Ohio State University, Columbus, OH, USA
| | - Michael J Butler
- Institute for Behavioral Medicine Research, The Ohio State University, Columbus, OH, USA
| | - Sabrina E Mackey-Alfonso
- Institute for Behavioral Medicine Research, The Ohio State University, Columbus, OH, USA; Medical Scientist Training Program, The Ohio State University, Columbus, OH, USA
| | - Ruth M Barrientos
- Institute for Behavioral Medicine Research, The Ohio State University, Columbus, OH, USA; Department of Psychiatry and Behavioral Health, The Ohio State University, Columbus, OH, USA; Department of Neuroscience, The Ohio State University, Columbus, OH, USA; Chronic Brain Injury Program, The Ohio State University, Columbus, OH, USA.
| |
Collapse
|
19
|
Brécier A, Li VW, Smith CS, Halievski K, Ghasemlou N. Circadian rhythms and glial cells of the central nervous system. Biol Rev Camb Philos Soc 2023; 98:520-539. [PMID: 36352529 DOI: 10.1111/brv.12917] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2022] [Revised: 10/17/2022] [Accepted: 10/25/2022] [Indexed: 11/12/2022]
Abstract
Glial cells are the most abundant cells in the central nervous system and play crucial roles in neural development, homeostasis, immunity, and conductivity. Over the past few decades, glial cell activity in mammals has been linked to circadian rhythms, the 24-h chronobiological clocks that regulate many physiological processes. Indeed, glial cells rhythmically express clock genes that cell-autonomously regulate glial function. In addition, recent findings in rodents have revealed that disruption of the glial molecular clock could impact the entire organism. In this review, we discuss the impact of circadian rhythms on the function of the three major glial cell types - astrocytes, microglia, and oligodendrocytes - across different locations within the central nervous system. We also review recent evidence uncovering the impact of glial cells on the body's circadian rhythm. Together, this sheds new light on the involvement of glial clock machinery in various diseases.
Collapse
Affiliation(s)
- Aurélie Brécier
- Pain Chronobiology & Neuroimmunology Laboratory, Queen's University, Botterell Hall, room 754, Kingston, ON, K7L 3N6, Canada
- Department of Biomedical & Molecular Sciences, 18 Stuart Street, Kingston, ON, K7L 3N6, Canada
| | - Vina W Li
- Pain Chronobiology & Neuroimmunology Laboratory, Queen's University, Botterell Hall, room 754, Kingston, ON, K7L 3N6, Canada
- Department of Biomedical & Molecular Sciences, 18 Stuart Street, Kingston, ON, K7L 3N6, Canada
| | - Chloé S Smith
- Pain Chronobiology & Neuroimmunology Laboratory, Queen's University, Botterell Hall, room 754, Kingston, ON, K7L 3N6, Canada
- Department of Biomedical & Molecular Sciences, 18 Stuart Street, Kingston, ON, K7L 3N6, Canada
| | - Katherine Halievski
- Pain Chronobiology & Neuroimmunology Laboratory, Queen's University, Botterell Hall, room 754, Kingston, ON, K7L 3N6, Canada
| | - Nader Ghasemlou
- Pain Chronobiology & Neuroimmunology Laboratory, Queen's University, Botterell Hall, room 754, Kingston, ON, K7L 3N6, Canada
- Department of Biomedical & Molecular Sciences, 18 Stuart Street, Kingston, ON, K7L 3N6, Canada
- Department of Anesthesiology & Perioperative Medicine, 76 Stuart Street, Kingston, ON, K7L 2V7, Canada
- Centre for Neuroscience Studies, Queen's University, 18 Stuart Street, Kingston, ON, K7L 3N6, Canada
| |
Collapse
|
20
|
Logiacco F, Grzegorzek LC, Cordell EC, Popp O, Mertins P, Gutmann DH, Kettenmann H, Semtner M. Neurofibromatosis type 1-dependent alterations in mouse microglia function are not cell-intrinsic. Acta Neuropathol Commun 2023; 11:36. [PMID: 36890585 PMCID: PMC9996880 DOI: 10.1186/s40478-023-01525-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2022] [Accepted: 02/05/2023] [Indexed: 03/10/2023] Open
Abstract
We previously discovered a sex-by-genotype defect in microglia function using a heterozygous germline knockout mouse model of Neurofibromatosis type 1 (Nf1 ± mice), in which only microglia from male Nf1 ± mice exhibited defects in purinergic signaling. Herein, we leveraged an unbiased proteomic approach to demonstrate that male, but not female, heterozygous Nf1 ± microglia exhibit differences in protein expression, which largely reflect pathways involved in cytoskeletal organization. In keeping with these predicted defects in cytoskeletal function, only male Nf1 ± microglia had reduced process arborization and surveillance capacity. To determine whether these microglial defects were cell autonomous or reflected adaptive responses to Nf1 heterozygosity in other cells in the brain, we generated conditional microglia Nf1-mutant knockout mice by intercrossing Nf1flox/flox with Cx3cr1-CreER mice (Nf1flox/wt; Cx3cr1-CreER mice, Nf1MG ± mice). Surprisingly, neither male nor female Nf1MG ± mouse microglia had impaired process arborization or surveillance capacity. In contrast, when Nf1 heterozygosity was generated in neurons, astrocytes and oligodendrocytes by intercrossing Nf1flox/flox with hGFAP-Cre mice (Nf1flox/wt; hGFAP-Cre mice, Nf1GFAP ± mice), the microglia defects found in Nf1 ± mice were recapitulated. Collectively, these data reveal that Nf1 ± sexually dimorphic microglia abnormalities are likely not cell-intrinsic properties, but rather reflect a response to Nf1 heterozygosity in other brain cells.
Collapse
Affiliation(s)
- Francesca Logiacco
- Cellular Neurosciences, Max-Delbrück-Center for Molecular Medicine in the Helmholtz Association, 13125, Berlin, Germany
- Institute of Cell Biology and Neurobiology, Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität Berlin, and Berlin Institute of Health, 10117, Berlin, Germany
| | - Laura Cathleen Grzegorzek
- Cellular Neurosciences, Max-Delbrück-Center for Molecular Medicine in the Helmholtz Association, 13125, Berlin, Germany
- Institute of Cell Biology and Neurobiology, Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität Berlin, and Berlin Institute of Health, 10117, Berlin, Germany
| | - Elizabeth C Cordell
- Department of Neurology, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Oliver Popp
- Proteomics Platform, Max-Delbrück-Center for Molecular Medicine in the Helmholtz Association, 13125, Berlin, Germany
| | - Philipp Mertins
- Proteomics Platform, Max-Delbrück-Center for Molecular Medicine in the Helmholtz Association, 13125, Berlin, Germany
| | - David H Gutmann
- Department of Neurology, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Helmut Kettenmann
- Cellular Neurosciences, Max-Delbrück-Center for Molecular Medicine in the Helmholtz Association, 13125, Berlin, Germany
- Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China
| | - Marcus Semtner
- Cellular Neurosciences, Max-Delbrück-Center for Molecular Medicine in the Helmholtz Association, 13125, Berlin, Germany.
| |
Collapse
|
21
|
Iweka CA, Seigneur E, Hernandez AL, Paredes SH, Cabrera M, Blacher E, Pasternak CT, Longo FM, de Lecea L, Andreasson KI. Myeloid deficiency of the intrinsic clock protein BMAL1 accelerates cognitive aging by disrupting microglial synaptic pruning. J Neuroinflammation 2023; 20:48. [PMID: 36829230 PMCID: PMC9951430 DOI: 10.1186/s12974-023-02727-8] [Citation(s) in RCA: 14] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2022] [Accepted: 02/10/2023] [Indexed: 02/26/2023] Open
Abstract
Aging is associated with loss of circadian immune responses and circadian gene transcription in peripheral macrophages. Microglia, the resident macrophages of the brain, also show diurnal rhythmicity in regulating local immune responses and synaptic remodeling. To investigate the interaction between aging and microglial circadian rhythmicity, we examined mice deficient in the core clock transcription factor, BMAL1. Aging Cd11bcre;Bmallox/lox mice demonstrated accelerated cognitive decline in association with suppressed hippocampal long-term potentiation and increases in immature dendritic spines. C1q deposition at synapses and synaptic engulfment were significantly decreased in aging Bmal1-deficient microglia, suggesting that BMAL1 plays a role in regulating synaptic pruning in aging. In addition to accelerated age-associated hippocampal deficits, Cd11bcre;Bmallox/lox mice also showed deficits in the sleep-wake cycle with increased wakefulness across light and dark phases. These results highlight an essential role of microglial BMAL1 in maintenance of synapse homeostasis in the aging brain.
Collapse
Affiliation(s)
- Chinyere Agbaegbu Iweka
- Department of Neurology and Neurological Sciences, Stanford School of Medicine, Stanford, CA, USA
| | - Erica Seigneur
- Department of Psychiatry and Behavioral Sciences, Stanford University, Stanford, CA, USA
| | - Amira Latif Hernandez
- Department of Neurology and Neurological Sciences, Stanford School of Medicine, Stanford, CA, USA
| | | | - Mica Cabrera
- Department of Neurology and Neurological Sciences, Stanford School of Medicine, Stanford, CA, USA
| | - Eran Blacher
- Department of Neurology and Neurological Sciences, Stanford School of Medicine, Stanford, CA, USA
- Department of Biological Chemistry, The Alexander Silberman Institute of Life Sciences, The Hebrew University of Jerusalem, Edmond J. Safra Campus Givat-Ram, 9190401, Jerusalem, Israel
| | - Connie Tsai Pasternak
- Department of Neurology and Neurological Sciences, Stanford School of Medicine, Stanford, CA, USA
- Wu Tsai Neurosciences Institute, Stanford University, Stanford, CA, USA
| | - Frank M Longo
- Department of Neurology and Neurological Sciences, Stanford School of Medicine, Stanford, CA, USA
| | - Luis de Lecea
- Department of Psychiatry and Behavioral Sciences, Stanford University, Stanford, CA, USA
| | - Katrin I Andreasson
- Department of Neurology and Neurological Sciences, Stanford School of Medicine, Stanford, CA, USA.
- Wu Tsai Neurosciences Institute, Stanford University, Stanford, CA, USA.
- Stanford Immunology Program, Stanford University, Stanford, CA, USA.
- Chan Zuckerberg Biohub, San Francisco, CA, 94158, USA.
| |
Collapse
|
22
|
Guzmán-Ruiz MA, Guerrero-Vargas NN, Lagunes-Cruz A, González-González S, García-Aviles JE, Hurtado-Alvarado G, Mendez-Hernández R, Chavarría-Krauser A, Morin JP, Arriaga-Avila V, Buijs RM, Guevara-Guzmán R. Circadian modulation of microglial physiological processes and immune responses. Glia 2023; 71:155-167. [PMID: 35971989 PMCID: PMC10087862 DOI: 10.1002/glia.24261] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2022] [Revised: 07/11/2022] [Accepted: 08/01/2022] [Indexed: 11/09/2022]
Abstract
Microglia is considered the central nervous system (CNS) resident macrophages that establish an innate immune response against pathogens and toxins. However, the recent studies have shown that microglial gene and protein expression follows a circadian pattern; several immune activation markers and clock genes are expressed rhythmically without the need for an immune stimulus. Furthermore, microglia responds to an immune challenge with different magnitudes depending on the time of the day. This review examines the circadian control of microglia function and the possible physiological implications. For example, we discuss that synaptic prune is performed in the cortex at a certain moment of the day. We also consider the implications of daily microglial function for maintaining biological rhythms like general activity, body temperature, and food intake. We conclude that the developmental stage, brain region, and pathological state are not the only factors to consider for the evaluation of microglial functions; instead, emerging evidence indicates that circadian time as an essential aspect for a better understanding of the role of microglia in CNS physiology.
Collapse
Affiliation(s)
- Mara A Guzmán-Ruiz
- Departamento de Fisiología, Facultad de Medicina, Universidad Nacional Autónoma de México, México City, Mexico
| | - Natalí N Guerrero-Vargas
- Departamento de Anatomía, Facultad de Medicina, Universidad Nacional Autónoma de México, México City, Mexico
| | - Alejandra Lagunes-Cruz
- Departamento de Fisiología, Facultad de Medicina, Universidad Nacional Autónoma de México, México City, Mexico
| | - Shellye González-González
- Departamento de Anatomía, Facultad de Medicina, Universidad Nacional Autónoma de México, México City, Mexico
| | - Jesús Enrique García-Aviles
- Área de Neurociencias, Departamento de Biología de la Reproducción, Ciencias Biológicas y de la Salud, Universidad Autónoma Metropolitana, México City, Mexico
| | | | - Rebeca Mendez-Hernández
- Instituto Investigaciones Biomédicas, Universidad Nacional Autónoma de México, México City, Mexico
| | - Anahí Chavarría-Krauser
- Unidad de Investigación en Medicina Experimental, Facultad de Medicina, Universidad Nacional Autónoma de México, México City, Mexico
| | - Jean-Pascal Morin
- Departamento de Fisiología, Facultad de Medicina, Universidad Nacional Autónoma de México, México City, Mexico
| | - Virginia Arriaga-Avila
- Departamento de Fisiología, Facultad de Medicina, Universidad Nacional Autónoma de México, México City, Mexico
| | - Ruud M Buijs
- Instituto Investigaciones Biomédicas, Universidad Nacional Autónoma de México, México City, Mexico
| | - Rosalinda Guevara-Guzmán
- Departamento de Fisiología, Facultad de Medicina, Universidad Nacional Autónoma de México, México City, Mexico
| |
Collapse
|
23
|
Zheng Y, Pan L, Wang F, Yan J, Wang T, Xia Y, Yao L, Deng K, Zheng Y, Xia X, Su Z, Chen H, Lin J, Ding Z, Zhang K, Zhang M, Chen Y. Neural function of Bmal1: an overview. Cell Biosci 2023; 13:1. [PMID: 36593479 PMCID: PMC9806909 DOI: 10.1186/s13578-022-00947-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2022] [Accepted: 12/19/2022] [Indexed: 01/04/2023] Open
Abstract
Bmal1 (Brain and muscle arnt-like, or Arntl) is a bHLH/PAS domain transcription factor central to the transcription/translation feedback loop of the biologic clock. Although Bmal1 is well-established as a major regulator of circadian rhythm, a growing number of studies in recent years have shown that dysfunction of Bmal1 underlies a variety of psychiatric, neurodegenerative-like, and endocrine metabolism-related disorders, as well as potential oncogenic roles. In this review, we systematically summarized Bmal1 expression in different brain regions, its neurological functions related or not to circadian rhythm and biological clock, and pathological phenotypes arising from Bmal1 knockout. This review also discusses oscillation and rhythmicity, especially in the suprachiasmatic nucleus, and provides perspective on future progress in Bmal1 research.
Collapse
Affiliation(s)
- Yuanjia Zheng
- grid.464402.00000 0000 9459 9325Research Institute of Acupuncture and Moxibustion, Shandong University of Traditional Chinese Medicine, Jinan, China ,grid.411866.c0000 0000 8848 7685South China Research Center for Acupuncture and Moxibustion, Medical College of Acu-Moxi and Rehabilitation, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Lingyun Pan
- grid.411866.c0000 0000 8848 7685South China Research Center for Acupuncture and Moxibustion, Medical College of Acu-Moxi and Rehabilitation, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Feixue Wang
- grid.464402.00000 0000 9459 9325Research Institute of Acupuncture and Moxibustion, Shandong University of Traditional Chinese Medicine, Jinan, China
| | - Jinglan Yan
- grid.464402.00000 0000 9459 9325Research Institute of Acupuncture and Moxibustion, Shandong University of Traditional Chinese Medicine, Jinan, China
| | - Taiyi Wang
- grid.464402.00000 0000 9459 9325Research Institute of Acupuncture and Moxibustion, Shandong University of Traditional Chinese Medicine, Jinan, China
| | - Yucen Xia
- grid.464402.00000 0000 9459 9325Research Institute of Acupuncture and Moxibustion, Shandong University of Traditional Chinese Medicine, Jinan, China
| | - Lin Yao
- grid.464402.00000 0000 9459 9325Research Institute of Acupuncture and Moxibustion, Shandong University of Traditional Chinese Medicine, Jinan, China
| | - Kelin Deng
- grid.411866.c0000 0000 8848 7685South China Research Center for Acupuncture and Moxibustion, Medical College of Acu-Moxi and Rehabilitation, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Yuqi Zheng
- grid.411866.c0000 0000 8848 7685South China Research Center for Acupuncture and Moxibustion, Medical College of Acu-Moxi and Rehabilitation, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Xiaoye Xia
- grid.411866.c0000 0000 8848 7685South China Research Center for Acupuncture and Moxibustion, Medical College of Acu-Moxi and Rehabilitation, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Zhikai Su
- grid.411866.c0000 0000 8848 7685The Second Clinical College, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong China
| | - Hongjie Chen
- grid.411866.c0000 0000 8848 7685South China Research Center for Acupuncture and Moxibustion, Medical College of Acu-Moxi and Rehabilitation, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Jie Lin
- grid.411866.c0000 0000 8848 7685South China Research Center for Acupuncture and Moxibustion, Medical College of Acu-Moxi and Rehabilitation, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Zhenwei Ding
- grid.411866.c0000 0000 8848 7685South China Research Center for Acupuncture and Moxibustion, Medical College of Acu-Moxi and Rehabilitation, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Kaitong Zhang
- grid.411866.c0000 0000 8848 7685South China Research Center for Acupuncture and Moxibustion, Medical College of Acu-Moxi and Rehabilitation, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Meng Zhang
- grid.464402.00000 0000 9459 9325Research Institute of Acupuncture and Moxibustion, Shandong University of Traditional Chinese Medicine, Jinan, China
| | - Yongjun Chen
- grid.464402.00000 0000 9459 9325Research Institute of Acupuncture and Moxibustion, Shandong University of Traditional Chinese Medicine, Jinan, China ,grid.411866.c0000 0000 8848 7685South China Research Center for Acupuncture and Moxibustion, Medical College of Acu-Moxi and Rehabilitation, Guangzhou University of Chinese Medicine, Guangzhou, China ,Center for Brain Science and Brain-Inspired Intelligence, Guangdong-Hong Kong-Macao Greater Bay Area, Guangzhou, China
| |
Collapse
|
24
|
Jang DY, Yang B, You MJ, Rim C, Kim HJ, Sung S, Kwon MS. Fluoxetine Decreases Phagocytic Function via REV-ERBα in Microglia. Neurochem Res 2023; 48:196-209. [PMID: 36048349 DOI: 10.1007/s11064-022-03733-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2022] [Revised: 08/16/2022] [Accepted: 08/21/2022] [Indexed: 01/11/2023]
Abstract
Although fluoxetine (FLX) is a commonly used drug in psychiatric disorders, such as major depressive disorder, anxiety disorder, panic disorder, and obsessive-compulsive disorder, the mechanism by which FLX exerts its therapeutic effect is not completely understood. In this study, we aimed to determine the possible mechanism by which FLX focuses on microglial phagocytosis. FLX reduced phagocytic function in BV2 cells and increased REV-ERBα without affecting other microglia-related genes, such as inflammation and phagocytosis. Although FLX did not change BMAL1 protein levels, it restricted the nucleocytoplasmic transport (NCT) of BMAL1, leading to its cytosolic accumulation. REV-ERBα antagonist SR8278 rescued the decreased phagocytic activity and restricted NCT of BMAL1. We also found that REV-ERBα mediates the effect of FLX via the inhibition of phospho-ERK (pERK). The ERK inhibitor FR180204 was sufficient to reduce phagocytic function in BV2 cells and restrict the NCT of BMAL1. These results were recapitulated in the primary microglia. In conclusion, we propose that FLX decreases phagocytic function and restricts BMAL1 NCT via REV-ERBα. In addition, ERK inhibition mimics the effects of FLX on microglia.
Collapse
Affiliation(s)
- Da-Yoon Jang
- Department of Pharmacology, School of Medicine, Research Institute for Basic Medical Science, CHA University, CHA BIO COMPLEX, 335 Pangyo, Bundang-Gu, Seongnam-si, 13488, Gyeonggi-do, Republic of Korea.,Research Competency Milestones Program (RECOMP) of School of Medicine, CHA University, Seongnam-si, South Korea
| | - Bohyun Yang
- Department of Pharmacology, School of Medicine, Research Institute for Basic Medical Science, CHA University, CHA BIO COMPLEX, 335 Pangyo, Bundang-Gu, Seongnam-si, 13488, Gyeonggi-do, Republic of Korea
| | - Min-Jung You
- Department of Pharmacology, School of Medicine, Research Institute for Basic Medical Science, CHA University, CHA BIO COMPLEX, 335 Pangyo, Bundang-Gu, Seongnam-si, 13488, Gyeonggi-do, Republic of Korea
| | - Chan Rim
- Department of Pharmacology, School of Medicine, Research Institute for Basic Medical Science, CHA University, CHA BIO COMPLEX, 335 Pangyo, Bundang-Gu, Seongnam-si, 13488, Gyeonggi-do, Republic of Korea
| | - Hui-Ju Kim
- Department of Pharmacology, School of Medicine, Research Institute for Basic Medical Science, CHA University, CHA BIO COMPLEX, 335 Pangyo, Bundang-Gu, Seongnam-si, 13488, Gyeonggi-do, Republic of Korea
| | - Soyoung Sung
- Department of Pharmacology, School of Medicine, Research Institute for Basic Medical Science, CHA University, CHA BIO COMPLEX, 335 Pangyo, Bundang-Gu, Seongnam-si, 13488, Gyeonggi-do, Republic of Korea
| | - Min-Soo Kwon
- Department of Pharmacology, School of Medicine, Research Institute for Basic Medical Science, CHA University, CHA BIO COMPLEX, 335 Pangyo, Bundang-Gu, Seongnam-si, 13488, Gyeonggi-do, Republic of Korea.
| |
Collapse
|
25
|
Yin JCP, Cui E, Hardin PE, Zhou H. Circadian disruption of memory consolidation in Drosophila. Front Syst Neurosci 2023; 17:1129152. [PMID: 37034015 PMCID: PMC10073699 DOI: 10.3389/fnsys.2023.1129152] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2022] [Accepted: 02/27/2023] [Indexed: 04/11/2023] Open
Abstract
The role of the circadian system in memory formation is an important question in neurobiology. Despite this hypothesis being intuitively appealing, the existing data is confusing. Recent work in Drosophila has helped to clarify certain aspects of the problem, but the emerging sense is that the likely mechanisms are more complex than originally conceptualized. In this report, we identify a post-training window of time (during consolidation) when the circadian clock and its components are involved in memory formation. In the broader context, our data suggest that circadian biology might have multiple roles during memory formation. Testing for its roles at multiple timepoints, and in different cells, will be necessary to resolve some of the conflicting data.
Collapse
Affiliation(s)
- Jerry C. P. Yin
- Laboratory of Genetics, School of Medicine and Public Health, University of Wisconsin—Madison, Madison, WI, United States
- Neurology Department, School of Medicine and Public Health, University of Wisconsin—Madison, Madison, WI, United States
- *Correspondence: Jerry C. P. Yin
| | - Ethan Cui
- Laboratory of Genetics, School of Medicine and Public Health, University of Wisconsin—Madison, Madison, WI, United States
| | - Paul E. Hardin
- Department of Biology and Center for Biological Clocks Research, Texas A&M University, College Station, College Station, TX, United States
| | - Hong Zhou
- Laboratory of Genetics, School of Medicine and Public Health, University of Wisconsin—Madison, Madison, WI, United States
| |
Collapse
|
26
|
Zhang Y, Zhao X, Zhang Y, Zeng F, Yan S, Chen Y, Li Z, Zhou D, Liu L. The role of circadian clock in astrocytes: From cellular functions to ischemic stroke therapeutic targets. Front Neurosci 2022; 16:1013027. [PMID: 36570843 PMCID: PMC9772621 DOI: 10.3389/fnins.2022.1013027] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2022] [Accepted: 11/10/2022] [Indexed: 12/14/2022] Open
Abstract
Accumulating evidence suggests that astrocytes, the abundant cell type in the central nervous system (CNS), play a critical role in maintaining the immune response after cerebral infarction, regulating the blood-brain barrier (BBB), providing nutrients to the neurons, and reuptake of glutamate. The circadian clock is an endogenous timing system that controls and optimizes biological processes. The central circadian clock and the peripheral clock are consistent, controlled by various circadian components, and participate in the pathophysiological process of astrocytes. Existing evidence shows that circadian rhythm controls the regulation of inflammatory responses by astrocytes in ischemic stroke (IS), regulates the repair of the BBB, and plays an essential role in a series of pathological processes such as neurotoxicity and neuroprotection. In this review, we highlight the importance of astrocytes in IS and discuss the potential role of the circadian clock in influencing astrocyte pathophysiology. A comprehensive understanding of the ability of the circadian clock to regulate astrocytes after stroke will improve our ability to predict the targets and biological functions of the circadian clock and gain insight into the basis of its intervention mechanism.
Collapse
Affiliation(s)
- Yuxing Zhang
- Department of Neurology, The First Affiliated Hospital of Hunan University of Chinese Medicine, Changsha, Hunan, China,The Graduate School, Hunan University of Chinese Medicine, Changsha, Hunan, China
| | - Xin Zhao
- The Medical School, Hunan University of Chinese Medicine, Changsha, Hunan, China
| | - Ying Zhang
- Department of Neurology, The First Affiliated Hospital of Hunan University of Chinese Medicine, Changsha, Hunan, China,The Graduate School, Hunan University of Chinese Medicine, Changsha, Hunan, China
| | - Fukang Zeng
- Department of Neurology, The First Affiliated Hospital of Hunan University of Chinese Medicine, Changsha, Hunan, China,The Graduate School, Hunan University of Chinese Medicine, Changsha, Hunan, China
| | - Siyang Yan
- Department of Neurology, The First Affiliated Hospital of Hunan University of Chinese Medicine, Changsha, Hunan, China
| | - Yao Chen
- Department of Neurology, The First Affiliated Hospital of Hunan University of Chinese Medicine, Changsha, Hunan, China
| | - Zhong Li
- Department of Neurology, The First Affiliated Hospital of Hunan University of Chinese Medicine, Changsha, Hunan, China
| | - Desheng Zhou
- Department of Neurology, The First Affiliated Hospital of Hunan University of Chinese Medicine, Changsha, Hunan, China,Desheng Zhou,
| | - Lijuan Liu
- Department of Neurology, The First Affiliated Hospital of Hunan University of Chinese Medicine, Changsha, Hunan, China,*Correspondence: Lijuan Liu,
| |
Collapse
|
27
|
Rojo D, Badner A, Gibson EM. Circadian Control of Glial Cell Homeodynamics. J Biol Rhythms 2022; 37:593-608. [PMID: 36068711 PMCID: PMC9729367 DOI: 10.1177/07487304221120966] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
The molecular mechanisms that maintain circadian rhythms in mammalian as well as non-mammalian systems are well documented in neuronal populations but comparatively understudied in glia. Glia are highly dynamic in form and function, and the circadian clock provides broad dynamic ranges for the maintenance of this homeostasis, thus glia are key to understanding the role of circadian biology in brain function. Here, we highlight the implications of the molecular circadian clock on the homeodynamic nature of glia, underscoring the current gap in understanding the role of the circadian system in oligodendroglia lineage cells and subsequent myelination. Through this perspective, we will focus on the intersection of circadian and glial biology and how it interfaces with global circadian rhythm maintenance associated with normative and aberrant brain function.
Collapse
Affiliation(s)
- Daniela Rojo
- Department of Psychiatry and Behavioral Sciences, Stanford University School of Medicine, Palo Alto, CA 94305, USA
| | - Anna Badner
- Department of Psychiatry and Behavioral Sciences, Stanford University School of Medicine, Palo Alto, CA 94305, USA
| | - Erin M. Gibson
- Department of Psychiatry and Behavioral Sciences, Stanford University School of Medicine, Palo Alto, CA 94305, USA,Corresponding Author: Erin M. Gibson, PhD, 3165 Porter Drive, #2178, Palo Alto, CA 94304, (650)725-6659,
| |
Collapse
|
28
|
Wang J, Li L, Zhang Z, Zhang X, Zhu Y, Zhang C, Bi Y. Extracellular vesicles mediate the communication of adipose tissue with brain and promote cognitive impairment associated with insulin resistance. Cell Metab 2022; 34:1264-1279.e8. [PMID: 36070680 DOI: 10.1016/j.cmet.2022.08.004] [Citation(s) in RCA: 60] [Impact Index Per Article: 30.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/21/2022] [Revised: 05/24/2022] [Accepted: 08/04/2022] [Indexed: 12/18/2022]
Abstract
Type 2 diabetes with obesity-related insulin resistance as the main manifestation is associated with an increased risk of cognitive impairment. Adipose tissue plays an important role in this process. Here, we demonstrated that adipose tissue-derived extracellular vesicles (EVs) and their cargo microRNAs (miRNAs) mediate inter-organ communication between adipose tissue and the brain, which can be transferred into the brain in a membrane protein-dependent manner and enriched in neurons, especially in the hippocampus. Further investigation suggests that adipose tissue-derived EVs from high-fat diet (HFD)-fed mice or patients with diabetes induce remarkable synaptic loss and cognitive impairment. Depletion of miRNA cargo in these EVs significantly alleviates their detrimental effects on cognitive function. Collectively, these data suggest that targeting adipose tissue-derived EVs or their cargo miRNAs may provide a promising strategy for pharmaceutical interventions for cognitive impairment in diabetes.
Collapse
Affiliation(s)
- Jin Wang
- Department of Endocrinology, Drum Tower Hospital affiliated to Nanjing University Medical School, Branch of National Clinical Research Centre for Metabolic Diseases, Nanjing 210008, China
| | - Liang Li
- State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, 163 Xianlin Avenue, Nanjing 210023, China; Institute for Brain Sciences, Nanjing University, 163 Xianlin Avenue, Nanjing 210023, China
| | - Zhou Zhang
- Department of Endocrinology, Drum Tower Hospital affiliated to Nanjing University Medical School, Branch of National Clinical Research Centre for Metabolic Diseases, Nanjing 210008, China
| | - Xuhong Zhang
- State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, 163 Xianlin Avenue, Nanjing 210023, China
| | - Ye Zhu
- Department of Endocrinology, Drum Tower Hospital affiliated to Nanjing University Medical School, Branch of National Clinical Research Centre for Metabolic Diseases, Nanjing 210008, China
| | - Chenyu Zhang
- Nanjing Drum Tower Hospital Center of Molecular Diagnostic and Therapy, State Key Laboratory of Pharmaceutical Biotechnology, Jiangsu Engineering Research Center for MicroRNA Biology and Biotechnology, NJU Advanced Institute of Life Sciences (NAILS), NJU Institute of AI Biomedicine and Biotechnology, School of Life Sciences, Nanjing University, Nanjing 210023, China
| | - Yan Bi
- Department of Endocrinology, Drum Tower Hospital affiliated to Nanjing University Medical School, Branch of National Clinical Research Centre for Metabolic Diseases, Nanjing 210008, China.
| |
Collapse
|
29
|
Chen M, Zhang L, Shao M, Du J, Xiao Y, Zhang F, Zhang T, Li Y, Zhou Q, Liu K, Wang Z, Wu B. E4BP4 Coordinates Circadian Control of Cognition in Delirium. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2022; 9:e2200559. [PMID: 35713240 PMCID: PMC9376827 DOI: 10.1002/advs.202200559] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/28/2022] [Revised: 04/24/2022] [Indexed: 05/07/2023]
Abstract
Improved understanding of the etiologies of delirium, a common and severe neuropsychiatric syndrome, would facilitate the disease prevention and treatment. Here, the authors invesitgate the role of circadian rhythms in the pathogenesis of delirium. They observe perturbance of circadian rhythms in mouse models of delirium and disrupted clock gene expression in patients with delirium. In turn, physiological and genetic circadian disruptions sensitize mice to delirium with aggravated cognitive impairment. Likewise, global deletion of E4bp4 (E4 promoter-binding protein), a clock gene markedly altered in delirium conditions, results in exacerbated delirium-associated cognitive decline. Cognitive decline in delirium models is attributed to microglial activation and impaired long-term potentiation in the hippocampus. Single-cell RNA-sequencing reveals microglia as the regulatory target of E4bp4. E4bp4 restrains microglial activation via inhibiting the ERK1/2 signaling pathway. Supporting this, mice lacking in microglial E4bp4 are delirious prone, whereas mice with E4bp4 specifically deleted in hippocampal CA1 neurons have a normal phenotype. Mechanistically, E4bp4 inhibits ERK1/2 signaling by trans-repressing Mapk1/3 (genes encoding ERK1/2) via direct binding to a D-box element in the promoter region. These findings define a causal role of clock dysfunction in delirium development and indicate E4bp4 as a regulator of cognition at the crosstalk between circadian clock and delirium.
Collapse
Affiliation(s)
- Min Chen
- Institute of Molecular Rhythm and MetabolismGuangzhou University of Chinese MedicineGuangzhou510006China
- College of PharmacyJinan UniversityGuangzhou510632China
| | - Li Zhang
- College of PharmacyJinan UniversityGuangzhou510632China
| | - Mingting Shao
- Guangdong‐Hongkong‐Macau Institute of CNS RegenerationJinan UniversityGuangzhou510632China
| | - Jianhao Du
- College of PharmacyJinan UniversityGuangzhou510632China
| | - Yifei Xiao
- Institute of Molecular Rhythm and MetabolismGuangzhou University of Chinese MedicineGuangzhou510006China
| | - Fugui Zhang
- Institute of Molecular Rhythm and MetabolismGuangzhou University of Chinese MedicineGuangzhou510006China
| | - Tianpeng Zhang
- Institute of Molecular Rhythm and MetabolismGuangzhou University of Chinese MedicineGuangzhou510006China
| | - Yifang Li
- College of PharmacyJinan UniversityGuangzhou510632China
| | - Qianqian Zhou
- Shenzhen People's Hospital (The Second Clinical Medical CollegeJinan University; The First Affiliated HospitalSouthern University of Science and Technology)Shenzhen518119China
| | - Kaisheng Liu
- Shenzhen People's Hospital (The Second Clinical Medical CollegeJinan University; The First Affiliated HospitalSouthern University of Science and Technology)Shenzhen518119China
| | - Zhigang Wang
- Department of Intensive Care UnitFirst Affiliated Hospital of Jinan UniversityGuangzhou510630China
| | - Baojian Wu
- Institute of Molecular Rhythm and MetabolismGuangzhou University of Chinese MedicineGuangzhou510006China
| |
Collapse
|
30
|
High-Fat Diet Consumption in Adolescence Induces Emotional Behavior Alterations and Hippocampal Neurogenesis Deficits Accompanied by Excessive Microglial Activation. Int J Mol Sci 2022; 23:ijms23158316. [PMID: 35955450 PMCID: PMC9368636 DOI: 10.3390/ijms23158316] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2022] [Revised: 07/24/2022] [Accepted: 07/26/2022] [Indexed: 11/17/2022] Open
Abstract
Adolescence is a developmental epoch characterized by massive neural circuit remodeling; thus, the brain is particularly vulnerable to environmental influences during this period. Excessive high-fat diet (HFD) consumption, which is very common among adolescents, has long been recognized as a potent risk factor for multiple mood disorders, including depression and anxiety. However, the precise mechanisms underlying the influences of HFD consumption in adolescence on emotional health are far from clear. In the present study, C57BL/6 mice were fed a control diet (CD) or HFD for about 4 weeks from postnatal day (P) 28 to P60, spanning most of the adolescence period, and then subjected to behavioral assessments and histological examinations. HFD mice exhibited elevated levels of depression and anxiety, decreased hippocampal neurogenesis, and excessive microglial activation in the ventral hippocampus. Furthermore, in HFD-fed mice, microglia showed increased DCX+ inclusions, suggesting aberrant microglial engulfment of newborn neurons in HFD-fed adolescents. To our knowledge, this is the first observation suggesting that the negative effects of HFD consumption in adolescence on emotion and neuroplasticity may be attributed at least in part to aberrant microglial engulfment of nascent neurons, extending our understanding of the mechanism underlying HFD-related affective disorders in young people.
Collapse
|
31
|
Zhang Q, Jin K, Chen B, Liu R, Cheng S, Zhang Y, Lu J. Overnutrition Induced Cognitive Impairment: Insulin Resistance, Gut-Brain Axis, and Neuroinflammation. Front Neurosci 2022; 16:884579. [PMID: 35873818 PMCID: PMC9298971 DOI: 10.3389/fnins.2022.884579] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2022] [Accepted: 06/02/2022] [Indexed: 12/11/2022] Open
Abstract
Overnutrition-related obesity has become a worldwide epidemic, and its prevalence is expected to steadily rise in the future. It is widely recognized that obesity exerts negative impacts on metabolic disorders such as type 2 diabetes mellitus (T2DM) and cardiovascular diseases. However, relatively fewer reports exist on the impairment of brain structure and function, in the form of memory and executive dysfunction, as well as neurogenerative diseases. Emerging evidence indicates that besides obesity, overnutrition diets independently induce cognitive impairments via multiple mechanisms. In this study, we reviewed the clinical and preclinical literature about the detrimental effects of obesity or high-nutrition diets on cognitive performance and cerebral structure. We mainly focused on the role of brain insulin resistance (IR), microbiota-gut-brain axis, and neuroinflammation. We concluded that before the onset of obesity, short-term exposure to high-nutrition diets already blunted central responses to insulin, altered gut microbiome composition, and activated inflammatory mediators. Overnutrition is linked with the changes in protein expression in brain insulin signaling, leading to pathological features in the brain. Microbiome alteration, bacterial endotoxin release, and gut barrier hyperpermeability also occur to trigger mental and neuronal diseases. In addition, obesity or high-nutrition diets cause chronic and low-grade systematic inflammation, which eventually spreads from the peripheral tissue to the central nervous system (CNS). Altogether, a large number of unknown but potential routes interact and contribute to obesity or diet-induced cognitive impairment. The challenge for future research is to identify effective interventions involving dietary shifts and personalized therapy targeting the underlying mechanisms to prevent and improve cognition deficits.
Collapse
Affiliation(s)
- Qin Zhang
- First Clinical Medical College, Zhejiang Chinese Medical University, Hangzhou, China
| | - Kangyu Jin
- Department of Psychiatry, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Bing Chen
- Department of Psychiatry, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Ripeng Liu
- First Clinical Medical College, Zhejiang Chinese Medical University, Hangzhou, China.,Second Clinical Medical College, Zhejiang Chinese Medical University, Hangzhou, China
| | - Shangping Cheng
- School of Life Sciences, Zhejiang Chinese Medical University, Hangzhou, China
| | - Yuyan Zhang
- School of Life Sciences, Zhejiang Chinese Medical University, Hangzhou, China
| | - Jing Lu
- Department of Psychiatry, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China.,Key Laboratory of Mental Disorder Management in Zhejiang Province, Hangzhou, China
| |
Collapse
|
32
|
Banerjee J, Dorfman MD, Fasnacht R, Douglass JD, Wyse-Jackson AC, Barria A, Thaler JP. CX3CL1 Action on Microglia Protects from Diet-Induced Obesity by Restoring POMC Neuronal Excitability and Melanocortin System Activity Impaired by High-Fat Diet Feeding. Int J Mol Sci 2022; 23:6380. [PMID: 35742824 PMCID: PMC9224384 DOI: 10.3390/ijms23126380] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2022] [Revised: 05/31/2022] [Accepted: 06/04/2022] [Indexed: 02/04/2023] Open
Abstract
Both hypothalamic microglial inflammation and melanocortin pathway dysfunction contribute to diet-induced obesity (DIO) pathogenesis. Previous studies involving models of altered microglial signaling demonstrate altered DIO susceptibility with corresponding POMC neuron cytological changes, suggesting a link between microglia and the melanocortin system. We addressed this hypothesis using the specific microglial silencing molecule, CX3CL1 (fractalkine), to determine whether reducing hypothalamic microglial activation can restore POMC/melanocortin signaling to protect against DIO. We performed metabolic analyses in high fat diet (HFD)-fed mice with targeted viral overexpression of CX3CL1 in the hypothalamus. Electrophysiologic recording in hypothalamic slices from POMC-MAPT-GFP mice was used to determine the effects of HFD feeding and microglial silencing via minocycline or CX3CL1 on GFP-labeled POMC neurons. Finally, mice with hypothalamic overexpression of CX3CL1 received central treatment with the melanocortin receptor antagonist SHU9119 to determine whether melanocortin signaling is required for the metabolic benefits of CX3CL1. Hypothalamic overexpression of CX3CL1 increased leptin sensitivity and POMC gene expression, while reducing weight gain in animals fed an HFD. In electrophysiological recordings from hypothalamic slice preparations, HFD feeding was associated with reduced POMC neuron excitability and increased amplitude of inhibitory postsynaptic currents. Microglial silencing using minocycline or CX3CL1 treatment reversed these HFD-induced changes in POMC neuron electrophysiologic properties. Correspondingly, blockade of melanocortin receptor signaling in vivo prevented both the acute and chronic reduction in food intake and body weight mediated by CX3CL1. Our results show that suppressing microglial activation during HFD feeding reduces DIO susceptibility via a mechanism involving increased POMC neuron excitability and melanocortin signaling.
Collapse
Affiliation(s)
- Jineta Banerjee
- Department of Medicine, Division of Metabolism, Endocrinology and Nutrition, University of Washington Medicine Diabetes Institute, University of Washington, Seattle, WA 98109, USA; (J.B.); (M.D.D.); (R.F.); (J.D.D.); (A.C.W.-J.)
| | - Mauricio D. Dorfman
- Department of Medicine, Division of Metabolism, Endocrinology and Nutrition, University of Washington Medicine Diabetes Institute, University of Washington, Seattle, WA 98109, USA; (J.B.); (M.D.D.); (R.F.); (J.D.D.); (A.C.W.-J.)
| | - Rachael Fasnacht
- Department of Medicine, Division of Metabolism, Endocrinology and Nutrition, University of Washington Medicine Diabetes Institute, University of Washington, Seattle, WA 98109, USA; (J.B.); (M.D.D.); (R.F.); (J.D.D.); (A.C.W.-J.)
| | - John D. Douglass
- Department of Medicine, Division of Metabolism, Endocrinology and Nutrition, University of Washington Medicine Diabetes Institute, University of Washington, Seattle, WA 98109, USA; (J.B.); (M.D.D.); (R.F.); (J.D.D.); (A.C.W.-J.)
| | - Alice C. Wyse-Jackson
- Department of Medicine, Division of Metabolism, Endocrinology and Nutrition, University of Washington Medicine Diabetes Institute, University of Washington, Seattle, WA 98109, USA; (J.B.); (M.D.D.); (R.F.); (J.D.D.); (A.C.W.-J.)
| | - Andres Barria
- Department of Physiology and Biophysics, University of Washington, Seattle, WA 98109, USA;
| | - Joshua P. Thaler
- Department of Medicine, Division of Metabolism, Endocrinology and Nutrition, University of Washington Medicine Diabetes Institute, University of Washington, Seattle, WA 98109, USA; (J.B.); (M.D.D.); (R.F.); (J.D.D.); (A.C.W.-J.)
| |
Collapse
|
33
|
Ke P, Zheng C, Liu F, Wu L, Tang Y, Wu Y, Lv D, Chen H, Qian L, Wu X, Zeng K. Relationship between circadian genes and memory impairment caused by sleep deprivation. PeerJ 2022; 10:e13165. [PMID: 35341046 PMCID: PMC8944342 DOI: 10.7717/peerj.13165] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2021] [Accepted: 03/04/2022] [Indexed: 01/12/2023] Open
Abstract
Background Sleep deprivation (SD)-induced cognitive impairment is highly prevalent worldwide and has attracted widespread attention. The temporal and spatial oscillations of circadian genes are severely disturbed after SD, leading to a progressive loss of their physiological rhythms, which in turn affects memory function. However, there is a lack of research on the role of circadian genes and memory function after SD. Therefore, the present study aims to investigate the relationship between circadian genes and memory function and provide potential therapeutic insights into the mechanism of SD-induced memory impairment. Methods Gene expression profiles of GSE33302 and GSE9442 from the Gene Expression Omnibus (GEO) were applied to identify differentially expressed genes (DEGs). Subsequently, both datasets were subjected to Gene Set Enrichment Analysis (GSEA) to determine the overall gene changes in the hippocampus and brain after SD. A Gene Oncology (GO) analysis and Protein-Protein Interaction (PPI) analysis were employed to explore the genes related to circadian rhythm, with their relationship and importance determined through a correlation analysis and a receiver operating characteristic curve (ROC), respectively. The water maze experiments detected behavioral changes related to memory function in SD rats. The expression of circadian genes in several critical organs such as the brain, heart, liver, and lungs and their correlation with memory function was investigated using several microarrays. Finally, changes in the hippocampal immune environment after SD were analyzed using the CIBERSORT in R software. Results The quality of the two datasets was very good. After SD, changes were seen primarily in genes related to memory impairment and immune function. Genes related to circadian rhythm were highly correlated with engagement in muscle structure development and circadian rhythm. Seven circadian genes showed their potential therapeutic value in SD. Water maze experiments confirmed that SD exacerbates memory impairment-related behaviors, including prolonged escape latencies and reduced numbers of rats crossing the platform. The expression of circadian genes was verified, while some genes were also significant in the heart, liver, and lungs. All seven circadian genes were also associated with memory markers in SD. The contents of four immune cells in the hippocampal immune environment changed after SD. Seven circadian genes were related to multiple immune cells. Conclusions In the present study, we found that SD leads to memory impairment accompanied by changes in circadian rhythm-related genes. Seven circadian genes play crucial roles in memory impairment after SD. Naïve B cells and follicular helper T cells are closely related to SD. These findings provide new insights into the treatment of memory impairment caused by SD.
Collapse
Affiliation(s)
- Peng Ke
- Department of Anesthesiology, Anesthesiology Research Institute, the First Affiliated Hospital of Fujian Medical University, Fuzhou, Fujian, China,Department of Anesthesiology, Shengli Clinical Medical College, Fujian Medical University, Fuzhou, Fujian, China
| | - Chengjie Zheng
- Department of Anesthesiology, Shengli Clinical Medical College, Fujian Medical University, Fuzhou, Fujian, China
| | - Feng Liu
- Department of Anesthesiology, Shengli Clinical Medical College, Fujian Medical University, Fuzhou, Fujian, China
| | - LinJie Wu
- Institute of Pharmaceutics, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, Zhejiang, China
| | - Yijie Tang
- Department of Anesthesiology, Shengli Clinical Medical College, Fujian Medical University, Fuzhou, Fujian, China
| | - Yanqin Wu
- Department of Anesthesiology, Shengli Clinical Medical College, Fujian Medical University, Fuzhou, Fujian, China
| | - Dongdong Lv
- Department of Anesthesiology, Shengli Clinical Medical College, Fujian Medical University, Fuzhou, Fujian, China
| | - Huangli Chen
- Department of Anesthesiology, Shengli Clinical Medical College, Fujian Medical University, Fuzhou, Fujian, China
| | - Lin Qian
- Department of Anesthesiology, Shengli Clinical Medical College, Fujian Medical University, Fuzhou, Fujian, China
| | - Xiaodan Wu
- Department of Anesthesiology, Shengli Clinical Medical College, Fujian Medical University, Fuzhou, Fujian, China
| | - Kai Zeng
- Department of Anesthesiology, Anesthesiology Research Institute, the First Affiliated Hospital of Fujian Medical University, Fuzhou, Fujian, China
| |
Collapse
|
34
|
Milanova IV, Korpel NL, Correa-da-Silva F, Berends E, Osman S, la Fleur SE, Fliers E, Kalsbeek A, Yi CX. Loss of Microglial Insulin Receptor Leads to Sex-Dependent Metabolic Disorders in Obese Mice. Int J Mol Sci 2022; 23:ijms23062933. [PMID: 35328354 PMCID: PMC8954452 DOI: 10.3390/ijms23062933] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2022] [Revised: 02/27/2022] [Accepted: 03/05/2022] [Indexed: 02/08/2023] Open
Abstract
Obesity and type 2 diabetes mellitus (T2DM) are highly prevalent disorders, associated with insulin resistance and chronic inflammation. The brain is key for energy homeostasis and contains many insulin receptors. Microglia, the resident brain immune cells, are known to express insulin receptors (InsR) and to be activated by a hypercaloric environment. The aim of this study was to evaluate whether microglial insulin signaling is involved in the control of systemic energy homeostasis and whether this function is sex-dependent. We generated a microglia-specific knockout of the InsR gene in male and female mice and exposed them to control or obesogenic dietary conditions. Following 10 weeks of diet exposure, we evaluated insulin tolerance, energy metabolism, microglial morphology and phagocytic function, and neuronal populations. Lack of microglial InsR resulted in increased plasma insulin levels and insulin resistance in obese female mice. In the brain, loss of microglial InsR led to a decrease in microglial primary projections in both male and female mice, irrespective of the diet. In addition, in obese male mice lacking microglial InsR the number of proopiomelanocortin neurons was decreased, compared to control diet, while no differences were observed in female mice. Our results demonstrate a sex-dependent effect of microglial InsR-signaling in physiology and obesity, and stress the importance of a heterogeneous approach in the study of diseases such as obesity and T2DM.
Collapse
Affiliation(s)
- Irina V. Milanova
- Department of Endocrinology and Metabolism, Amsterdam University Medical Centers, University of Amsterdam, 1105 AZ Amsterdam, The Netherlands; (I.V.M.); (N.L.K.); (F.C.-d.-S.); (E.B.); (S.O.); (S.E.l.F.); (E.F.); (A.K.)
- Laboratory of Endocrinology, Amsterdam University Medical Centers, Amsterdam Gastroenterology Endocrinology Metabolism (AGEM), 1105 AZ Amsterdam, The Netherlands
| | - Nikita L. Korpel
- Department of Endocrinology and Metabolism, Amsterdam University Medical Centers, University of Amsterdam, 1105 AZ Amsterdam, The Netherlands; (I.V.M.); (N.L.K.); (F.C.-d.-S.); (E.B.); (S.O.); (S.E.l.F.); (E.F.); (A.K.)
- Laboratory of Endocrinology, Amsterdam University Medical Centers, Amsterdam Gastroenterology Endocrinology Metabolism (AGEM), 1105 AZ Amsterdam, The Netherlands
| | - Felipe Correa-da-Silva
- Department of Endocrinology and Metabolism, Amsterdam University Medical Centers, University of Amsterdam, 1105 AZ Amsterdam, The Netherlands; (I.V.M.); (N.L.K.); (F.C.-d.-S.); (E.B.); (S.O.); (S.E.l.F.); (E.F.); (A.K.)
- Laboratory of Endocrinology, Amsterdam University Medical Centers, Amsterdam Gastroenterology Endocrinology Metabolism (AGEM), 1105 AZ Amsterdam, The Netherlands
| | - Eline Berends
- Department of Endocrinology and Metabolism, Amsterdam University Medical Centers, University of Amsterdam, 1105 AZ Amsterdam, The Netherlands; (I.V.M.); (N.L.K.); (F.C.-d.-S.); (E.B.); (S.O.); (S.E.l.F.); (E.F.); (A.K.)
- Laboratory of Endocrinology, Amsterdam University Medical Centers, Amsterdam Gastroenterology Endocrinology Metabolism (AGEM), 1105 AZ Amsterdam, The Netherlands
| | - Samar Osman
- Department of Endocrinology and Metabolism, Amsterdam University Medical Centers, University of Amsterdam, 1105 AZ Amsterdam, The Netherlands; (I.V.M.); (N.L.K.); (F.C.-d.-S.); (E.B.); (S.O.); (S.E.l.F.); (E.F.); (A.K.)
- Laboratory of Endocrinology, Amsterdam University Medical Centers, Amsterdam Gastroenterology Endocrinology Metabolism (AGEM), 1105 AZ Amsterdam, The Netherlands
| | - Susanne E. la Fleur
- Department of Endocrinology and Metabolism, Amsterdam University Medical Centers, University of Amsterdam, 1105 AZ Amsterdam, The Netherlands; (I.V.M.); (N.L.K.); (F.C.-d.-S.); (E.B.); (S.O.); (S.E.l.F.); (E.F.); (A.K.)
- Laboratory of Endocrinology, Amsterdam University Medical Centers, Amsterdam Gastroenterology Endocrinology Metabolism (AGEM), 1105 AZ Amsterdam, The Netherlands
- Netherlands Institute for Neuroscience, Royal Netherlands Academy of Arts and Sciences, 1105 BA Amsterdam, The Netherlands
| | - Eric Fliers
- Department of Endocrinology and Metabolism, Amsterdam University Medical Centers, University of Amsterdam, 1105 AZ Amsterdam, The Netherlands; (I.V.M.); (N.L.K.); (F.C.-d.-S.); (E.B.); (S.O.); (S.E.l.F.); (E.F.); (A.K.)
| | - Andries Kalsbeek
- Department of Endocrinology and Metabolism, Amsterdam University Medical Centers, University of Amsterdam, 1105 AZ Amsterdam, The Netherlands; (I.V.M.); (N.L.K.); (F.C.-d.-S.); (E.B.); (S.O.); (S.E.l.F.); (E.F.); (A.K.)
- Laboratory of Endocrinology, Amsterdam University Medical Centers, Amsterdam Gastroenterology Endocrinology Metabolism (AGEM), 1105 AZ Amsterdam, The Netherlands
- Netherlands Institute for Neuroscience, Royal Netherlands Academy of Arts and Sciences, 1105 BA Amsterdam, The Netherlands
| | - Chun-Xia Yi
- Department of Endocrinology and Metabolism, Amsterdam University Medical Centers, University of Amsterdam, 1105 AZ Amsterdam, The Netherlands; (I.V.M.); (N.L.K.); (F.C.-d.-S.); (E.B.); (S.O.); (S.E.l.F.); (E.F.); (A.K.)
- Laboratory of Endocrinology, Amsterdam University Medical Centers, Amsterdam Gastroenterology Endocrinology Metabolism (AGEM), 1105 AZ Amsterdam, The Netherlands
- Correspondence:
| |
Collapse
|
35
|
Engel DF, Velloso LA. The timeline of neuronal and glial alterations in experimental obesity. Neuropharmacology 2022; 208:108983. [PMID: 35143850 DOI: 10.1016/j.neuropharm.2022.108983] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2021] [Revised: 01/03/2022] [Accepted: 02/02/2022] [Indexed: 12/14/2022]
Abstract
In experimental models, hypothalamic dysfunction is a key component of the pathophysiology of diet-induced obesity. Early after the introduction of a high-fat diet, neurons, microglia, astrocytes and tanycytes of the mediobasal hypothalamus undergo structural and functional changes that impact caloric intake, energy expenditure and systemic glucose tolerance. Inflammation has emerged as a central component of this response, and as in other inflammatory conditions, there is a time course of events that determine the fate of distinct cells involved in the central regulation of whole-body energy homeostasis. Here, we review the work that identified key mechanisms, cellular players and temporal features of diet-induced hypothalamic abnormalities.
Collapse
Affiliation(s)
- Daiane F Engel
- School of Pharmacy, Federal University of Ouro Preto, Brazil
| | - Licio A Velloso
- Laboratory of Cell Signaling, Obesity and Comorbidities Research Center, University of Campinas, Brazil.
| |
Collapse
|
36
|
Barahona RA, Morabito S, Swarup V, Green KN. Cortical diurnal rhythms remain intact with microglial depletion. Sci Rep 2022; 12:114. [PMID: 34997092 PMCID: PMC8742049 DOI: 10.1038/s41598-021-04079-w] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2021] [Accepted: 12/01/2021] [Indexed: 12/15/2022] Open
Abstract
Microglia are subject to change in tandem with the endogenously generated biological oscillations known as our circadian rhythm. Studies have shown microglia harbor an intrinsic molecular clock which regulates diurnal changes in morphology and influences inflammatory responses. In the adult brain, microglia play an important role in the regulation of condensed extracellular matrix structures called perineuronal nets (PNNs), and it has been suggested that PNNs are also regulated in a circadian and diurnal manner. We sought to determine whether microglia mediate the diurnal regulation of PNNs via CSF1R inhibitor dependent microglial depletion in C57BL/6J mice, and how the absence of microglia might affect cortical diurnal gene expression rhythms. While we observe diurnal differences in microglial morphology, where microglia are most ramified at the onset of the dark phase, we do not find diurnal differences in PNN intensity. However, PNN intensity increases across many brain regions in the absence of microglia, supporting a role for microglia in the regulation of PNNs. Here, we also show that cortical diurnal gene expression rhythms are intact, with no cycling gene changes without microglia. These findings demonstrate a role for microglia in the maintenance of PNNs, but not in the maintenance of diurnal rhythms.
Collapse
Affiliation(s)
- Rocio A Barahona
- Department of Neurobiology and Behavior, University of California, 3208 Biological Sciences III, Irvine, CA, 92697, USA
| | - Samuel Morabito
- Mathematical, Computational and Systems Biology (MCSB) Program, University of California, Irvine, CA, USA
| | - Vivek Swarup
- Department of Neurobiology and Behavior, University of California, 3208 Biological Sciences III, Irvine, CA, 92697, USA
| | - Kim N Green
- Department of Neurobiology and Behavior, University of California, 3208 Biological Sciences III, Irvine, CA, 92697, USA.
| |
Collapse
|
37
|
Choudhury ME, Mikami K, Nakanishi Y, Matsuura T, Utsunomiya R, Yano H, Kubo M, Ando R, Iwanami J, Yamashita M, Nagai M, Tanaka J. Insomnia and depressive behavior of MyD88-deficient mice: Relationships with altered microglial functions. J Neuroimmunol 2021; 363:577794. [PMID: 34971898 DOI: 10.1016/j.jneuroim.2021.577794] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2021] [Revised: 12/16/2021] [Accepted: 12/19/2021] [Indexed: 12/27/2022]
Abstract
Myeloid differentiation primary response gene 88 (MyD88) is essential for microglial activation. Despite the significant role of microglia in regulating sleep homeostasis, the contribution of MyD88 to sleep is yet to be determined. To address this, we performed electroencephalographic and electromyographic recordings on MyD88-KO mice and wild-type mice to investigate their sleep/wake cycles. In the daytime, MyD88-KO mice exhibited prolonged wakefulness and shorter non-rapid eye movement sleep duration. Tail suspension and sucrose preference tests revealed that MyD88-KO mice displayed a depressive-like phenotype. We determined monoamines in the prefrontal cortex (PFC) using high-performance liquid chromatography and observed a decreased content of serotonin in the PFC of MyD88-KO mice. Flow cytometry revealed that CD11b, CD45, and F4/80 expressions were elevated at Zeitgeber time (ZT) 1 compared to at ZT13 only in wild-type mice. Furthermore, MFG-E8 and C1qB-tagged synapses were enhanced at ZT1 in the PFC of wild-type mice but not in MyD88-KO mice. Primary cultured microglia from MyD88-KO mice revealed decreased phagocytic ability. These findings indicate that genetic deletion of MyD88 induces insomnia and depressive behavior, at least in part, by affecting microglial homeostasis functions and lowering the serotonergic neuronal output.
Collapse
Affiliation(s)
- Mohammed E Choudhury
- Department of Molecular and Cellular Physiology, Ehime University Graduate School of Medicine, Toon, Ehime, Japan.
| | - Kanta Mikami
- Department of Molecular and Cellular Physiology, Ehime University Graduate School of Medicine, Toon, Ehime, Japan
| | - Yuiko Nakanishi
- Department of Molecular and Cellular Physiology, Ehime University Graduate School of Medicine, Toon, Ehime, Japan
| | - Taisei Matsuura
- Department of Molecular and Cellular Physiology, Ehime University Graduate School of Medicine, Toon, Ehime, Japan
| | - Ryo Utsunomiya
- Department of Molecular and Cellular Physiology, Ehime University Graduate School of Medicine, Toon, Ehime, Japan
| | - Hajime Yano
- Department of Molecular and Cellular Physiology, Ehime University Graduate School of Medicine, Toon, Ehime, Japan
| | - Madoka Kubo
- Department of Clinical Pharmacology and Therapeutics, Ehime University Graduate School of Medicine, Toon, Ehime, Japan
| | - Rina Ando
- Department of Clinical Pharmacology and Therapeutics, Ehime University Graduate School of Medicine, Toon, Ehime, Japan
| | - Jun Iwanami
- Department of Cell Biology and Molecular Medicine, Ehime University Graduate School of Medicine, Toon, Ehime, Japan
| | - Masakatsu Yamashita
- Department of Immunology, Ehime University Graduate School of Medicine, Toon, Ehime, Japan
| | - Masahiro Nagai
- Department of Clinical Pharmacology and Therapeutics, Ehime University Graduate School of Medicine, Toon, Ehime, Japan
| | - Junya Tanaka
- Department of Molecular and Cellular Physiology, Ehime University Graduate School of Medicine, Toon, Ehime, Japan
| |
Collapse
|
38
|
Lieu CV, Loganathan N, Belsham DD. Mechanisms Driving Palmitate-Mediated Neuronal Dysregulation in the Hypothalamus. Cells 2021; 10:3120. [PMID: 34831343 PMCID: PMC8617942 DOI: 10.3390/cells10113120] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2021] [Revised: 11/03/2021] [Accepted: 11/04/2021] [Indexed: 12/17/2022] Open
Abstract
The hypothalamus maintains whole-body homeostasis by integrating information from circulating hormones, nutrients and signaling molecules. Distinct neuronal subpopulations that express and secrete unique neuropeptides execute the individual functions of the hypothalamus, including, but not limited to, the regulation of energy homeostasis, reproduction and circadian rhythms. Alterations at the hypothalamic level can lead to a myriad of diseases, such as type 2 diabetes mellitus, obesity, and infertility. The excessive consumption of saturated fatty acids can induce neuroinflammation, endoplasmic reticulum stress, and resistance to peripheral signals, ultimately leading to hyperphagia, obesity, impaired reproductive function and disturbed circadian rhythms. This review focuses on the how the changes in the underlying molecular mechanisms caused by palmitate exposure, the most commonly consumed saturated fatty acid, and the potential involvement of microRNAs, a class of non-coding RNA molecules that regulate gene expression post-transcriptionally, can result in detrimental alterations in protein expression and content. Studying the involvement of microRNAs in hypothalamic function holds immense potential, as these molecular markers are quickly proving to be valuable tools in the diagnosis and treatment of metabolic disease.
Collapse
Affiliation(s)
- Calvin V. Lieu
- Department of Physiology, University of Toronto, Medical Sciences Building 3247A, 1 King’s College Circle, Toronto, ON M5S 1A8, Canada; (C.V.L.); (N.L.)
| | - Neruja Loganathan
- Department of Physiology, University of Toronto, Medical Sciences Building 3247A, 1 King’s College Circle, Toronto, ON M5S 1A8, Canada; (C.V.L.); (N.L.)
| | - Denise D. Belsham
- Department of Physiology, University of Toronto, Medical Sciences Building 3247A, 1 King’s College Circle, Toronto, ON M5S 1A8, Canada; (C.V.L.); (N.L.)
- Departments of Obstetrics/Gynecology and Medicine, University of Toronto, Toronto, ON M5S 1A8, Canada
| |
Collapse
|
39
|
Wang XL, Li L. Microglia Regulate Neuronal Circuits in Homeostatic and High-Fat Diet-Induced Inflammatory Conditions. Front Cell Neurosci 2021; 15:722028. [PMID: 34720877 PMCID: PMC8549960 DOI: 10.3389/fncel.2021.722028] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2021] [Accepted: 09/27/2021] [Indexed: 12/12/2022] Open
Abstract
Microglia are brain resident macrophages, which actively survey the surrounding microenvironment and promote tissue homeostasis under physiological conditions. During this process, microglia participate in synaptic remodeling, neurogenesis, elimination of unwanted neurons and cellular debris. The complex interplay between microglia and neurons drives the formation of functional neuronal connections and maintains an optimal neural network. However, activation of microglia induced by chronic inflammation increases synaptic phagocytosis and leads to neuronal impairment or death. Microglial dysfunction is implicated in almost all brain diseases and leads to long-lasting functional deficiency, such as hippocampus-related cognitive decline and hypothalamus-associated energy imbalance (i.e., obesity). High-fat diet (HFD) consumption triggers mediobasal hypothalamic microglial activation and inflammation. Moreover, HFD-induced inflammation results in cognitive deficits by triggering hippocampal microglial activation. Here, we have summarized the current knowledge of microglial characteristics and biological functions and also reviewed the molecular mechanism of microglia in shaping neural circuitries mainly related to cognition and energy balance in homeostatic and diet-induced inflammatory conditions.
Collapse
Affiliation(s)
- Xiao-Lan Wang
- Department of Nephrology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Lianjian Li
- Department of Surgery, Hubei Provincial Hospital of Traditional Chinese Medicine, Wuhan, China.,Hubei Province Academy of Traditional Chinese Medicine, Wuhan, China
| |
Collapse
|
40
|
Wang XL, Li L. Circadian Clock Regulates Inflammation and the Development of Neurodegeneration. Front Cell Infect Microbiol 2021; 11:696554. [PMID: 34595127 PMCID: PMC8476957 DOI: 10.3389/fcimb.2021.696554] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2021] [Accepted: 08/18/2021] [Indexed: 12/15/2022] Open
Abstract
The circadian clock regulates numerous key physiological processes and maintains cellular, tissue, and systemic homeostasis. Disruption of circadian clock machinery influences key activities involved in immune response and brain function. Moreover, Immune activation has been closely linked to neurodegeneration. Here, we review the molecular clock machinery and the diurnal variation of immune activity. We summarize the circadian control of immunity in both central and peripheral immune cells, as well as the circadian regulation of brain cells that are implicated in neurodegeneration. We explore the important role of systemic inflammation on neurodegeneration. The circadian clock modulates cellular metabolism, which could be a mechanism underlying circadian control. We also discuss the circadian interventions implicated in inflammation and neurodegeneration. Targeting circadian clocks could be a potential strategy for the prevention and treatment of inflammation and neurodegenerative diseases.
Collapse
Affiliation(s)
- Xiao-Lan Wang
- Department of Nephrology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Lianjian Li
- Department of Surgery, Hubei Provincial Hospital of Traditional Chinese Medicine, Wuhan, China
- Hubei Province Academy of Traditional Chinese Medicine, Wuhan, China
| |
Collapse
|
41
|
Abstract
Circadian rhythm pathway was demonstrated pathological functions in glioma on single-gene level. We aim to depict the multi-omics landscape of circadian rhythm pathway alteration in glioma using bioinformatic analyses. Multi-omics data were obtained from “cBioPortal” database. Comparisons were done regarding clinical parameters, differential-expressed genes and functional annotations. A pathway index was generated using the expression data from TCGA and GTEx to quantify the general alteration level of the pathway with clinical association of circadian rhythm pathway index explored. A total of 30 genes were mapped on the circadian rhythm pathway. Genomic profile ofcircadian rhythm pathway genes exhibited distinct characteristics on multiple levels between lower grade glioma (LGG) and glioblastoma multiforme (GBM) patients. LGG patients presented significantly higher frequencies of multi-omics mutations, as well as significant clinical relevance, on single-gene level. Differential-expressed genes between LGG and GBM patients revealed different functions between subtypes that related to the alteration of circadian rhythm pathway. LGG have significantly higher pathway index than normal brain tissue, while GBM significantly lower than normal tissue (P < 0.01), indicating distinctly altered circadian pathway in LGG. Circadian rhythm pathway index correlated with the prognosis of LGG, but not GBM, patients, with higher score indicating better survival outcome (LGG: HR = 0.39, 95% CI: 0.26 − 0.59, P < 0.001). In conclusion, LGG have more multi-omics alterations of circadian rhythm pathway than GBM. Quantification of circadian rhythm pathway using pathway index demonstrated hyperactivated pathway status in LGG and correlated with the prognosis of LGG patients.
Collapse
Affiliation(s)
- Chang Zhang
- Department of Internal Medicine, Guang Dong Second Hospital of Traditional Chinese Medicine, Guangzhou, China.,Department of Internal Medicine, Guangdong Key Laboratory of Traditional Chinese Medicine Research and Development, Guangzhou, Guangdong, China
| | - Jiahui Xu
- Department of Internal Medicine, Guang Dong Second Hospital of Traditional Chinese Medicine, Guangzhou, China.,Department of Internal Medicine, Guangdong Key Laboratory of Traditional Chinese Medicine Research and Development, Guangzhou, Guangdong, China
| | - Lijun Chen
- Department of Pediatrics, The Fifth Clinical College of Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Xiaojie Lin
- Department of Internal Medicine, Guang Dong Second Hospital of Traditional Chinese Medicine, Guangzhou, China.,Department of Internal Medicine, Guangdong Key Laboratory of Traditional Chinese Medicine Research and Development, Guangzhou, Guangdong, China
| |
Collapse
|