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Ye M, Zhu H, Lu X, Yang R, Wang H, Peng J, Pan H, Fang Y, Shi R, Li F, Chen Z, Hu W, Huang C. Central innate immunization induces tolerance against post-traumatic stress disorder-like behavior and neuroinflammatory responses in male mice. Brain Behav Immun 2024; 122:S0889-1591(24)00571-3. [PMID: 39197543 DOI: 10.1016/j.bbi.2024.08.049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/07/2024] [Revised: 08/23/2024] [Accepted: 08/24/2024] [Indexed: 09/01/2024] Open
Abstract
Post-traumatic stress disorder (PTSD) is a severe psychiatric disorder associated with abnormally elevated neuroinflammatory responses. Suppression of neuroinflammation is considered to be effective in ameliorating PTSD-like behaviors in rodents. Since pre-stimulation of microglia prior to stress exposure can prevent neuroinflammation, we hypothesized that pre-stimulation of microglia may prevent PTSD in animals. The results show that a single injection of a classical immune stimulant, lipopolysaccharide (LPS), at 50, 100 or 500, but not 10 μg/kg, one day before stress exposure, prevented the anxiety- and fear-like behaviors induced by modified single prolonged stress (mSPS). The time-dependent analysis shows that a single injection of LPS (100 μg/kg) either one or five, but not ten, days before stress prevented mSPS-induced anxiety- and fear-like behaviors. A second low-dose LPS injection 10 days after the first injection or a repeated LPS injection (4 × ) 10 days before stress induced tolerance to mSPS. Mechanistic studies show that a single injection of LPS one day before stress stimulation prevented mSPS-induced increases in levels of interleukin-1β (IL-1β), tumor necrosis factor-α (TNF-α), and IL-6 mRNA in the hippocampus and medial prefrontal cortex. Inhibition of microglia by pretreatment with minocycline or depletion of microglia by PLX3397 abolished the preventive effect of low-dose LPS pre-injection on mSPS-induced anxiety- and fear-like behavior and neuroinflammatory responses. These results suggest that pre-stimulation of microglia may prevent the development of PTSD-like behaviors by attenuating the development of neuroinflammatory responses. This could help to develop new strategies to prevent the damaging effects of harmful stress on the brain.
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Affiliation(s)
- Minxiu Ye
- Department of Pharmacy, Kunshan Hospital of Traditional Chinese Medicine, #388 Zuchongzhi South Road, Kunshan, Suzhou 215300, Jiangsu, China
| | - Haojie Zhu
- Department of Pharmacology, School of Pharmacy, Nantong University, #19 Qixiu Road, Nantong 226001, Jiangsu, China
| | - Xu Lu
- Department of Pharmacology, School of Pharmacy, Nantong University, #19 Qixiu Road, Nantong 226001, Jiangsu, China
| | - Rongrong Yang
- Department of Anesthesiology, Affiliated Hospital of Nantong University, #20 Xisi Road, Nantong 226001, Jiangsu, China
| | - Hanxiao Wang
- Department of Pharmacology, School of Pharmacy, Nantong University, #19 Qixiu Road, Nantong 226001, Jiangsu, China
| | - Jie Peng
- Department of Pharmacology, School of Pharmacy, Nantong University, #19 Qixiu Road, Nantong 226001, Jiangsu, China
| | - Hainan Pan
- Department of Pharmacology, School of Pharmacy, Nantong University, #19 Qixiu Road, Nantong 226001, Jiangsu, China
| | - Yunli Fang
- Department of Pharmacology, School of Pharmacy, Nantong University, #19 Qixiu Road, Nantong 226001, Jiangsu, China
| | - Ruiting Shi
- Faculty of Humanities and Social Sciences, City University of Macau, Av. Parde Tomas Pereira, Macau, Taipa 999078, China
| | - Fu Li
- Department of Pharmacy, Changzhou Geriatric Hospital Affiliated to Soochow University, Changzhou No.7 People's Hospital, 288# Yanling East Road, Changzhou 213000, Jiangsu, China
| | - Zhuo Chen
- Invasive Technology Department, the Second Affiliated Hospital of Nantong University, First People's Hospital of Nantong City, #666 Shengli Road, Nantong 226006, Jiangsu, China
| | - Wenfeng Hu
- Department of Pharmacy, Affiliated Maternal and Child Health Hospital of Nantong University, #399 Shijidadao, Nantong 226007, Jiangsu, China
| | - Chao Huang
- Department of Pharmacology, School of Pharmacy, Nantong University, #19 Qixiu Road, Nantong 226001, Jiangsu, China.
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Martins-Ferreira R, Calafell-Segura J, Chaves J, Ciudad L, Martins da Silva A, Pinho e Costa P, Leal B, Ballestar E. Purinergic exposure induces epigenomic and transcriptomic-mediated preconditioning resembling epilepsy-associated microglial states. iScience 2024; 27:110546. [PMID: 39184445 PMCID: PMC11342283 DOI: 10.1016/j.isci.2024.110546] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2023] [Revised: 03/10/2024] [Accepted: 07/16/2024] [Indexed: 08/27/2024] Open
Abstract
Microglia play a crucial role in a range of neuropathologies through exacerbated activation. Microglial inflammatory responses can be influenced by prior exposures to noxious stimuli, like increased levels of extracellular adenosine and ATP. These are characteristic of brain insults like epileptic seizures and could potentially shape subsequent responses through epigenetic regulation. We investigated DNA methylation and expression changes in human microglia-like cells differentiated from monocytes following ATP-mediated preconditioning. We demonstrate that microglia-like cells display homeostatic microglial features, shown by surface markers, transcriptome, and DNA methylome. After exposure to ATP, TLR-mediated activation leads to an exacerbated pro-inflammatory response. These changes are accompanied by methylation and transcriptional reprogramming associated with enhanced immune-related functions. The reprogramming associated with ATP-mediated preconditioning leads to profiles found in microglial subsets linked to epilepsy. Purine-driven microglia immune preconditioning drives epigenetic and transcriptional changes that could contribute to altered functions of microglia during seizure development and progression.
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Affiliation(s)
- Ricardo Martins-Ferreira
- Epigenetics and Immune Disease Group, Josep Carreras Leukaemia Research Institute (IJC), 08916 Badalona, Barcelona, Spain
- Immunogenetics Laboratory, Molecular Pathology and Immunology Department, Instituto de Ciências Biomédicas Abel Salazar – Universidade do Porto (ICBAS-UPorto), 4050-313 Porto, Portugal
- Autoimmunity and Neuroscience Group. Unit for Multidisciplinary Research in Biomedicine, ICBAS - School of Medicine and Biomedical Sciences, University of Porto, Porto, Portugal
- ITR - Laboratory for Integrative and Translational Research in Population Health, Porto, Portugal
| | - Josep Calafell-Segura
- Epigenetics and Immune Disease Group, Josep Carreras Leukaemia Research Institute (IJC), 08916 Badalona, Barcelona, Spain
| | - João Chaves
- Autoimmunity and Neuroscience Group. Unit for Multidisciplinary Research in Biomedicine, ICBAS - School of Medicine and Biomedical Sciences, University of Porto, Porto, Portugal
- ITR - Laboratory for Integrative and Translational Research in Population Health, Porto, Portugal
- Neurology Service, Centro Hospitalar Universitário de Santo António (CHUdSA), 4099-001 Porto, Portugal
| | - Laura Ciudad
- Epigenetics and Immune Disease Group, Josep Carreras Leukaemia Research Institute (IJC), 08916 Badalona, Barcelona, Spain
| | - António Martins da Silva
- Autoimmunity and Neuroscience Group. Unit for Multidisciplinary Research in Biomedicine, ICBAS - School of Medicine and Biomedical Sciences, University of Porto, Porto, Portugal
- ITR - Laboratory for Integrative and Translational Research in Population Health, Porto, Portugal
- Neurophysiology Service, CHUdSA 4099-001 Porto, Portugal
| | - Paulo Pinho e Costa
- Immunogenetics Laboratory, Molecular Pathology and Immunology Department, Instituto de Ciências Biomédicas Abel Salazar – Universidade do Porto (ICBAS-UPorto), 4050-313 Porto, Portugal
- Autoimmunity and Neuroscience Group. Unit for Multidisciplinary Research in Biomedicine, ICBAS - School of Medicine and Biomedical Sciences, University of Porto, Porto, Portugal
- ITR - Laboratory for Integrative and Translational Research in Population Health, Porto, Portugal
- Department of Human Genetics, Instituto Nacional de Saúde Dr. Ricardo Jorge 4000-055 Porto, Portugal
| | - Bárbara Leal
- Immunogenetics Laboratory, Molecular Pathology and Immunology Department, Instituto de Ciências Biomédicas Abel Salazar – Universidade do Porto (ICBAS-UPorto), 4050-313 Porto, Portugal
- Autoimmunity and Neuroscience Group. Unit for Multidisciplinary Research in Biomedicine, ICBAS - School of Medicine and Biomedical Sciences, University of Porto, Porto, Portugal
- ITR - Laboratory for Integrative and Translational Research in Population Health, Porto, Portugal
| | - Esteban Ballestar
- Epigenetics and Immune Disease Group, Josep Carreras Leukaemia Research Institute (IJC), 08916 Badalona, Barcelona, Spain
- Epigenetics in Inflammatory and Metabolic Diseases Laboratory, Health Science Center (HSC), East China Normal University (ECNU), Shanghai 200241, China
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3
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Yao Y, Du J, Wang D, Li N, Tao Z, Wu D, Peng F, Shi J, Zhou W, Zhao T, Tang Y. High-intensity interval training ameliorates postnatal immune activation-induced mood disorders through KDM6B-regulated glial activation. Brain Behav Immun 2024; 120:290-303. [PMID: 38851307 DOI: 10.1016/j.bbi.2024.06.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/17/2024] [Revised: 05/15/2024] [Accepted: 06/05/2024] [Indexed: 06/10/2024] Open
Abstract
Postnatal immune activation (PIA) induces persistent glial activation in the brain and causes various neuropathologies in adults. Exercise training improves stress-related mood disorders; however, the role of exercise in psychiatric disorders induced by early-life immune activation and the association between exercise training and glial activation remain unclear. We compared the effects of different exercise intensities on the PIA model, including high-intensity interval training (HIIT) and moderate-intensity continuous training (MICT). Both HIIT and MICT in adolescent mice inhibited neuroinflammation, remodeled synaptic plasticity, and improved PIA-induced mood disorders in adulthood. Importantly, HIIT was superior to MICT in terms of reducing inflammation and increasing body weight. RNA-seq of prefrontal cortex (PFC) tissues revealed a gene expression pattern, confirming that HIIT was more effective than MICT in improving brain glial cell activation through epigenetic modifications of KDM6B. We investigated the role of KDM6B, a specific histone lysine demethylation enzyme - histone 3 lysine 27 demethylase, in inhibiting glial activation against PIA-induced depression and anxiety by regulating the expression of IL-4 and brain-derived neurotrophic factor (BDNF). Overall, our data support the idea that HIIT improves PIA-induced mood disorders by regulating KDM6B-mediated epigenetic mechanisms and indicate that HIIT might be superior to MICT in improving mood disorders with PIA in mice. Our findings provide new insights into the treatment of anxiety and depression disorders.
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Affiliation(s)
- Yuan Yao
- Department of Anatomy and Neurobiology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Research Center for Sectional and Imaging Anatomy, Key Laboratory of Experimental Teratology of the Ministry of Education, Shandong Key Laboratory of Mental Disorders, Shandong Key Laboratory of Digital Human and Clinical Anatomy, Jinan, Shandong 250012, China; Institute of Brain and Brain-Inspired Science, Shandong University, Jinan, Shandong, 250012, China
| | - Jingyi Du
- Department of Anatomy and Neurobiology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Research Center for Sectional and Imaging Anatomy, Key Laboratory of Experimental Teratology of the Ministry of Education, Shandong Key Laboratory of Mental Disorders, Shandong Key Laboratory of Digital Human and Clinical Anatomy, Jinan, Shandong 250012, China
| | - Dongshuang Wang
- Department of Anatomy and Neurobiology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Research Center for Sectional and Imaging Anatomy, Key Laboratory of Experimental Teratology of the Ministry of Education, Shandong Key Laboratory of Mental Disorders, Shandong Key Laboratory of Digital Human and Clinical Anatomy, Jinan, Shandong 250012, China
| | - Naigang Li
- Department of Anatomy and Neurobiology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Research Center for Sectional and Imaging Anatomy, Key Laboratory of Experimental Teratology of the Ministry of Education, Shandong Key Laboratory of Mental Disorders, Shandong Key Laboratory of Digital Human and Clinical Anatomy, Jinan, Shandong 250012, China
| | - Zhouhang Tao
- Department of Anatomy and Neurobiology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Research Center for Sectional and Imaging Anatomy, Key Laboratory of Experimental Teratology of the Ministry of Education, Shandong Key Laboratory of Mental Disorders, Shandong Key Laboratory of Digital Human and Clinical Anatomy, Jinan, Shandong 250012, China
| | - Dong Wu
- Department of Anatomy and Neurobiology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Research Center for Sectional and Imaging Anatomy, Key Laboratory of Experimental Teratology of the Ministry of Education, Shandong Key Laboratory of Mental Disorders, Shandong Key Laboratory of Digital Human and Clinical Anatomy, Jinan, Shandong 250012, China
| | - Fan Peng
- Department of Anatomy and Neurobiology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Research Center for Sectional and Imaging Anatomy, Key Laboratory of Experimental Teratology of the Ministry of Education, Shandong Key Laboratory of Mental Disorders, Shandong Key Laboratory of Digital Human and Clinical Anatomy, Jinan, Shandong 250012, China
| | - Jiaming Shi
- Department of Anatomy and Neurobiology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Research Center for Sectional and Imaging Anatomy, Key Laboratory of Experimental Teratology of the Ministry of Education, Shandong Key Laboratory of Mental Disorders, Shandong Key Laboratory of Digital Human and Clinical Anatomy, Jinan, Shandong 250012, China; Institute of Brain and Brain-Inspired Science, Shandong University, Jinan, Shandong, 250012, China
| | - Wenjuan Zhou
- Department of Anatomy and Neurobiology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Research Center for Sectional and Imaging Anatomy, Key Laboratory of Experimental Teratology of the Ministry of Education, Shandong Key Laboratory of Mental Disorders, Shandong Key Laboratory of Digital Human and Clinical Anatomy, Jinan, Shandong 250012, China; Institute of Brain and Brain-Inspired Science, Shandong University, Jinan, Shandong, 250012, China
| | - Tiantian Zhao
- Department of Anatomy and Neurobiology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Research Center for Sectional and Imaging Anatomy, Key Laboratory of Experimental Teratology of the Ministry of Education, Shandong Key Laboratory of Mental Disorders, Shandong Key Laboratory of Digital Human and Clinical Anatomy, Jinan, Shandong 250012, China.
| | - Yuchun Tang
- Department of Anatomy and Neurobiology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Research Center for Sectional and Imaging Anatomy, Key Laboratory of Experimental Teratology of the Ministry of Education, Shandong Key Laboratory of Mental Disorders, Shandong Key Laboratory of Digital Human and Clinical Anatomy, Jinan, Shandong 250012, China; Institute of Brain and Brain-Inspired Science, Shandong University, Jinan, Shandong, 250012, China.
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4
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Lin Y, Liu M, Deng P, Zhang J. TET1 mediated m5C modification of RelB aggravates cerebral ischemia/reperfusion-induced neuroinflammation through regulating microglia polarization. Cell Signal 2024; 120:111210. [PMID: 38705503 DOI: 10.1016/j.cellsig.2024.111210] [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: 03/06/2024] [Revised: 04/11/2024] [Accepted: 05/02/2024] [Indexed: 05/07/2024]
Abstract
Microglia mediated neuroinflammation is one of the major contributors to brain damage in cerebral ischemia reperfusion injury (CI/RI). Recently, RNA modification was found to contribute to the regulation of microglia polarization and the subsequent development of cerebral I/R neuroinflammation. Herein, we investigated the effect and mechanism of m5C RNA modification in the microglia induced CI/RI neuroinflammation. We found that the m5C RNA modification levels decreased in the primary microglia isolated from a mouse model of intraluminal middle cerebral artery occlusion/reperfusion (MCAO/R) and the BV2 microglial cells subjected to oxygen-glucose deprivation and reoxygenation (OGD/R), and this change was accompanied by an increase in the M1/M2 polarization ratio. Furthermore, the expression of m5C demethylase TET1 in microglia increased, which promoted M1 polarization but impeded M2 polarization. Mechanistically, the higher TET1 expression decreased the m5C modification level of RelB and enhanced its mRNA stability, which subsequently increased the M1/M2 polarization ratio. In conclusion, this study provides insight into the role of m5C RNA modification in the pathogenesis of cerebral I/R neuroinflammation and may deepen our understanding on clinical therapy targeting the TET1-RelB axis.
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Affiliation(s)
- Yan Lin
- Department of Neurology, Sichuan Provincial People's Hospital, School of Medicine, University of Elctronic Science and Technology of China, 32 2rd Setion of Yihuan Road West, Qingyang District, Chengdu, 610072, Sichuan Province, China
| | - Mei Liu
- Department of Neurology, The Six People's Hospital of Chengdu, Chengdu, Sichuan Province 610072, China
| | - Pinghuan Deng
- Department of Encephalopathy, Dechang County Hospital of Traditional Chinese Medicine, Dechang, Sichuan Province 615500, China
| | - Jinzhi Zhang
- Department of Neurology, Sichuan Provincial People's Hospital, School of Medicine, University of Elctronic Science and Technology of China, 32 2rd Setion of Yihuan Road West, Qingyang District, Chengdu, 610072, Sichuan Province, China..
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5
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Charoensaensuk V, Yeh WL, Huang BR, Hsu TC, Xie SY, Chen CW, Wang YW, Yang LY, Tsai CF, Lu DY. Repetitive Administration of Low-Dose Lipopolysaccharide Improves Repeated Social Defeat Stress-Induced Behavioral Abnormalities and Aberrant Immune Response. J Neuroimmune Pharmacol 2024; 19:38. [PMID: 39066908 DOI: 10.1007/s11481-024-10141-x] [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: 01/30/2024] [Accepted: 07/14/2024] [Indexed: 07/30/2024]
Abstract
Repetitive exposure of innate immune cells to a subthreshold dosage of endotoxin components may modulate inflammatory responses. However, the regulatory mechanisms in the interactions between the central nervous system (CNS) and the immune system remain unclear. This study aimed to investigate the effects of lipopolysaccharide (LPS) preconditioning in repeated social defeat stress (RSDS)-induced abnormal immune responses and behavioral impairments. This study aimed to elucidate the mechanisms that underlie the protective effects of repeated administration of a subthreshold dose LPS on behavioral impairments using the RSDS paradigm. LPS preconditioning improved abnormal behaviors in RSDS-defeated mice, accompanied by decreased monoamine oxidases and increased glucocorticoid receptor expression in the hippocampus. In addition, pre-treated with LPS significantly decreased the recruited peripheral myeloid cells (CD11b+CD45hi), mainly circulating inflammatory monocytes (CD11b+CD45hiLy6ChiCCR2+) into the brain in response to RSDS challenge. Importantly, we found that LPS preconditioning exerts its protective properties by regulating lipocalin-2 (LCN2) expression in microglia, which subsequently induces expressions of chemokine CCL2 and pro-inflammatory cytokine. Subsequently, LPS-preconditioning lessened the resident microglia population (CD11b+CD45intCCL2+) in the brains of the RSDS-defeated mice. Moreover, RSDS-associated expressions of leukocytes (CD11b+CD45+CCR2+) and neutrophils (CD11b+CD45+Ly6G+) in the bone marrow, spleen, and blood were also attenuated by LPS-preconditioning. In particular, LPS preconditioning also promoted the expression of endogenous antioxidants and anti-inflammatory proteins in the hippocampus. Our results demonstrate that LPS preconditioning ameliorates lipocalin 2-associated microglial activation and aberrant immune response and promotes the expression of endogenous antioxidants and anti-inflammatory protein, thereby maintaining the homeostasis of pro-inflammation/anti-inflammation in both the brain and immune system, ultimately protecting the mice from RSDS-induced aberrant immune response and behavioral changes.
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Affiliation(s)
- Vichuda Charoensaensuk
- Department of Pharmacology, School of Medicine, China Medical University, Taichung, Taiwan
| | - Wei-Lan Yeh
- Department of Biochemistry, School of Medicine, China Medical University, Taichung, 40402, Taiwan
- Institute of New Drug Development, China Medical University, Taichung, Taiwan
| | - Bor-Ren Huang
- Department of Neurosurgery, Taichung Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, Taichung, Taiwan
- School of Medicine, Tzu Chi University, Hualien, Taiwan
| | - Tsung-Che Hsu
- School of Medicine, China Medical University, Taichung, 40402, Taiwan
| | - Sheng-Yun Xie
- Department of Pharmacology, School of Medicine, China Medical University, Taichung, Taiwan
| | - Chao-Wei Chen
- Institute of New Drug Development, China Medical University, Taichung, Taiwan
| | - Yu-Wen Wang
- Department of Biotechnology and Pharmaceutical Technology, Yuanpei University of Medical Technology, Hsinchu, Taiwan
| | - Liang-Yo Yang
- Department of Physiology, School of Medicine, China Medical University, Taichung, 404328, Taiwan
- Graduate Institute of Biomedical Science, China Medical University, Taichung, Taiwan
- Laboratory for Neural Repair, China Medical University Hospital, Taichung, 404327, Taiwan
| | - Cheng-Fang Tsai
- Department of Medical Laboratory Science and Biotechnology, Asia University, Taichung, Taiwan
| | - Dah-Yuu Lu
- Department of Pharmacology, School of Medicine, China Medical University, Taichung, Taiwan.
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Guerrero-Carrasco M, Targett I, Olmos-Alonso A, Vargas-Caballero M, Gomez-Nicola D. Low-grade systemic inflammation stimulates microglial turnover and accelerates the onset of Alzheimer's-like pathology. Glia 2024; 72:1340-1355. [PMID: 38597386 DOI: 10.1002/glia.24532] [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: 12/07/2023] [Revised: 03/22/2024] [Accepted: 03/26/2024] [Indexed: 04/11/2024]
Abstract
Several in vivo studies have shown that systemic inflammation, mimicked by LPS, triggers an inflammatory response in the CNS, driven by microglia, characterized by an increase in inflammatory cytokines and associated sickness behavior. However, most studies induce relatively high systemic inflammation, not directly compared with the more common low-grade inflammatory events experienced in humans during the life course. Using mice, we investigated the effects of low-grade systemic inflammation during an otherwise healthy early life, and how this may precondition the onset and severity of Alzheimer's disease (AD)-like pathology. Our results indicate that low-grade systemic inflammation induces sub-threshold brain inflammation and promotes microglial proliferation driven by the CSF1R pathway, contrary to the effects caused by high systemic inflammation. In addition, repeated systemic challenges with low-grade LPS induce disease-associated microglia. Finally, using an inducible model of AD-like pathology (Line 102 mice), we observed that preconditioning with repeated doses of low-grade systemic inflammation, prior to APP induction, promotes a detrimental effect later in life, leading to an increase in Aβ accumulation and disease-associated microglia. These results support the notion that episodic low-grade systemic inflammation has the potential to influence the onset and severity of age-related neurological disorders, such as AD.
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Affiliation(s)
- Monica Guerrero-Carrasco
- School of Biological Sciences, University of Southampton, Southampton General Hospital, Southampton, UK
| | - Imogen Targett
- School of Biological Sciences, University of Southampton, Southampton General Hospital, Southampton, UK
| | - Adrian Olmos-Alonso
- School of Biological Sciences, University of Southampton, Southampton General Hospital, Southampton, UK
| | - Mariana Vargas-Caballero
- School of Biological Sciences, University of Southampton, Southampton General Hospital, Southampton, UK
- Institute for Life Sciences (IfLS), University of Southampton, Southampton, UK
| | - Diego Gomez-Nicola
- School of Biological Sciences, University of Southampton, Southampton General Hospital, Southampton, UK
- Institute for Life Sciences (IfLS), University of Southampton, Southampton, UK
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Scholz R, Brösamle D, Yuan X, Beyer M, Neher JJ. Epigenetic control of microglial immune responses. Immunol Rev 2024; 323:209-226. [PMID: 38491845 DOI: 10.1111/imr.13317] [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: 12/18/2023] [Accepted: 03/02/2024] [Indexed: 03/18/2024]
Abstract
Microglia, the major population of brain-resident macrophages, are now recognized as a heterogeneous population comprising several cell subtypes with different (so far mostly supposed) functions in health and disease. A number of studies have performed molecular characterization of these different microglial activation states over the last years making use of "omics" technologies, that is transcriptomics, proteomics and, less frequently, epigenomics profiling. These approaches offer the possibility to identify disease mechanisms, discover novel diagnostic biomarkers, and develop new therapeutic strategies. Here, we focus on epigenetic profiling as a means to understand microglial immune responses beyond what other omics methods can offer, that is, revealing past and present molecular responses, gene regulatory networks and potential future response trajectories, and defining cell subtype-specific disease relevance through mapping non-coding genetic variants. We review the current knowledge in the field regarding epigenetic regulation of microglial identity and function, provide an exemplary analysis that demonstrates the advantages of performing joint transcriptomic and epigenomic profiling of single microglial cells and discuss how comprehensive epigenetic analyses may enhance our understanding of microglial pathophysiology.
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Affiliation(s)
- Rebekka Scholz
- Immunogenomics & Neurodegeneration, German Center for Neurodegenerative Diseases (DZNE), Bonn, Germany
- Systems Medicine, German Center for Neurodegenerative Diseases (DZNE), Bonn, Germany
| | - Desirée Brösamle
- Biomedical Center (BMC), Biochemistry, Faculty of Medicine, LMU Munich, Munich, Germany
- Neuroimmunology and Neurodegenerative Diseases, German Center for Neurodegenerative Diseases (DZNE), Munich, Germany
- Department of Cellular Neurology, Hertie Institute for Clinical Brain Research, University of Tübingen, Tübingen, Germany
- Munich Cluster for Systems Neurology (SyNergy), Munich, Germany
| | - Xidi Yuan
- Biomedical Center (BMC), Biochemistry, Faculty of Medicine, LMU Munich, Munich, Germany
- Neuroimmunology and Neurodegenerative Diseases, German Center for Neurodegenerative Diseases (DZNE), Munich, Germany
- Department of Cellular Neurology, Hertie Institute for Clinical Brain Research, University of Tübingen, Tübingen, Germany
- Munich Cluster for Systems Neurology (SyNergy), Munich, Germany
| | - Marc Beyer
- Immunogenomics & Neurodegeneration, German Center for Neurodegenerative Diseases (DZNE), Bonn, Germany
- Systems Medicine, German Center for Neurodegenerative Diseases (DZNE), Bonn, Germany
- Platform for Single Cell Genomics and Epigenomics, German Center for Neurodegenerative Diseases (DZNE) and University of Bonn and West German Genome Center, Bonn, Germany
| | - Jonas J Neher
- Biomedical Center (BMC), Biochemistry, Faculty of Medicine, LMU Munich, Munich, Germany
- Neuroimmunology and Neurodegenerative Diseases, German Center for Neurodegenerative Diseases (DZNE), Munich, Germany
- Department of Cellular Neurology, Hertie Institute for Clinical Brain Research, University of Tübingen, Tübingen, Germany
- Munich Cluster for Systems Neurology (SyNergy), Munich, Germany
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8
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Charoensaensuk V, Huang BR, Huang ST, Lin C, Xie SY, Chen CW, Chen YC, Cheng HT, Liu YS, Lai SW, Shen CK, Lin HJ, Yang LY, Lu DY. LPS priming-induced immune tolerance mitigates LPS-stimulated microglial activation and social avoidance behaviors in mice. J Pharmacol Sci 2024; 154:225-235. [PMID: 38485340 DOI: 10.1016/j.jphs.2024.02.006] [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: 11/13/2023] [Revised: 02/07/2024] [Accepted: 02/09/2024] [Indexed: 03/19/2024] Open
Abstract
In this study, we investigated the regulatory mechanisms underlying the effects of LPS tolerance on the inflammatory homeostasis of immune cells. LPS priming-induced immune tolerance downregulated cyclooxygenase-2, and lowered the production of prostaglandin-E2 in microglial cells. In addition, LPS tolerance downregulated the expression of suppressor of cytokine signaling 3, and inducible nitric oxide synthase/nitric oxide; suppressed the LPS-mediated induction of tumor necrosis factor-α, interleukin (IL)-6, and IL-1; and reduced reactive oxygen species production in microglial cells. LPS stimulation increased the levels of the adaptive response-related proteins heme oxygenase-1 and superoxide dismutase 2, and the levels of heme oxygenase-1 (HO-1) enhanced after LPS priming. Systemic administration of low-dose LPS (0.5 mg/kg) to mice for 4 consecutive days attenuated high-dose LPS (5 mg/kg)-induced inflammatory response, microglial activation, and proinflammatory cytokine expression. Moreover, repeated exposure to low-dose LPS suppressed the recruitment of peripheral monocytes or macrophages to brain regions and downregulated the expression of proinflammatory cytokines. Notably, LPS-induced social avoidance behaviors in mice were mitigated by immune tolerance. In conclusion, immune tolerance may reduce proinflammatory cytokine expression and reactive oxygen species production. Our findings provide insights into the effects of endotoxin tolerance on innate immune cells and social behaviors.
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Affiliation(s)
- Vichuda Charoensaensuk
- Department of Pharmacology, School of Medicine, China Medical University, Taichung, Taiwan
| | - Bor-Ren Huang
- Department of Neurosurgery, Taichung Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, Taichung, Taiwan; School of Medicine, Tzu Chi University, Hualien, Taiwan
| | - Sian-Ting Huang
- Department of Pharmacology, School of Medicine, China Medical University, Taichung, Taiwan
| | - Chingju Lin
- Department of Physiology, School of Medicine, China Medical University, Taichung, 404328, Taiwan
| | - Sheng-Yun Xie
- Department of Pharmacology, School of Medicine, China Medical University, Taichung, Taiwan
| | - Chao-Wei Chen
- Institute of New Drug Development, China Medical University, Taichung, Taiwan
| | - Yen-Chang Chen
- Institute of New Drug Development, China Medical University, Taichung, Taiwan
| | - Han-Tsung Cheng
- Department of Surgery, China Medical University Hospital, Taichung, Taiwan
| | - Yu-Shu Liu
- Department of Pharmacology, School of Medicine, China Medical University, Taichung, Taiwan
| | - Sheng-Wei Lai
- Department of Pharmacology, School of Medicine, China Medical University, Taichung, Taiwan
| | - Ching-Kai Shen
- Graduate Institute of Biomedical Science, China Medical University, Taichung, Taiwan
| | - Hui-Jung Lin
- Department of Pharmacology, School of Medicine, China Medical University, Taichung, Taiwan
| | - Liang-Yo Yang
- Department of Physiology, School of Medicine, China Medical University, Taichung, 404328, Taiwan; Laboratory for Neural Repair, China Medical University Hospital, Taichung, 404327, Taiwan; Biomedical Technology R&D Center, China Medical University Hospital, Taichung, 404327, Taiwan.
| | - Dah-Yuu Lu
- Department of Pharmacology, School of Medicine, China Medical University, Taichung, Taiwan; Department of Photonics and Communication Engineering, Asia University, Taichung, Taiwan.
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9
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Amro Z, Collins-Praino LE, Yool AJ. Protective roles of peroxiporins AQP0 and AQP11 in human astrocyte and neuronal cell lines in response to oxidative and inflammatory stressors. Biosci Rep 2024; 44:BSR20231725. [PMID: 38451099 DOI: 10.1042/bsr20231725] [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: 10/04/2023] [Revised: 03/03/2024] [Accepted: 03/06/2024] [Indexed: 03/08/2024] Open
Abstract
In addition to aquaporin (AQP) classes AQP1, AQP4 and AQP9 known to be expressed in mammalian brain, our recent transcriptomic analyses identified AQP0 and AQP11 in human cortex and hippocampus at levels correlated with age and Alzheimer's disease (AD) status; however, protein localization remained unknown. Roles of AQP0 and AQP11 in transporting hydrogen peroxide (H2O2) in lens and kidney prompted our hypothesis that up-regulation in brain might similarly be protective. Established cell lines for astroglia (1321N1) and neurons (SHSY5Y, differentiated with retinoic acid) were used to monitor changes in transcript levels for human AQPs (AQP0 to AQP12) in response to inflammation (simulated with 10-100 ng/ml lipopolysaccharide [LPS], 24 h), and hypoxia (5 min N2, followed by 0 to 24 h normoxia). AQP transcripts up-regulated in both 1321N1 and SHSY5Y included AQP0, AQP1 and AQP11. Immunocytochemistry in 1321N1 cells confirmed protein expression for AQP0 and AQP11 in plasma membrane and endoplasmic reticulum; AQP11 increased 10-fold after LPS and AQP0 increased 0.3-fold. In SHSY5Y cells, AQP0 expression increased 0.2-fold after 24 h LPS; AQP11 showed no appreciable change. Proposed peroxiporin roles were tested using melondialdehyde (MDA) assays to quantify lipid peroxidation levels after brief H2O2. Boosting peroxiporin expression by LPS pretreatment lowered subsequent H2O2-induced MDA responses (∼50%) compared with controls; conversely small interfering RNA knockdown of AQP0 in 1321N1 increased lipid peroxidation (∼17%) after H2O2, with a similar trend for AQP11 siRNA. Interventions that increase native brain peroxiporin activity are promising as new approaches to mitigate damage caused by aging and neurodegeneration.
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Affiliation(s)
- Zein Amro
- School of Biomedicine, University of Adelaide, Adelaide, SA 5005, Australia
| | | | - Andrea J Yool
- School of Biomedicine, University of Adelaide, Adelaide, SA 5005, Australia
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10
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Voshart DC, Oshima T, Jiang Y, van der Linden GP, Ainslie AP, Reali Nazario L, van Buuren-Broek F, Scholma AC, van Weering HRJ, Brouwer N, Sewdihal J, Brouwer U, Coppes RP, Holtman IR, Eggen BJL, Kooistra SM, Barazzuol L. Radiotherapy induces persistent innate immune reprogramming of microglia into a primed state. Cell Rep 2024; 43:113764. [PMID: 38358885 DOI: 10.1016/j.celrep.2024.113764] [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: 05/16/2023] [Revised: 12/06/2023] [Accepted: 01/25/2024] [Indexed: 02/17/2024] Open
Abstract
Over half of patients with brain tumors experience debilitating and often progressive cognitive decline after radiotherapy treatment. Microglia, the resident macrophages in the brain, have been implicated in this decline. In response to various insults, microglia can develop innate immune memory (IIM), which can either enhance (priming or training) or repress (tolerance) the response to subsequent inflammatory challenges. Here, we investigate whether radiation affects the IIM of microglia by irradiating the brains of rats and later exposing them to a secondary inflammatory stimulus. Comparative transcriptomic profiling and protein validation of microglia isolated from irradiated rats show a stronger immune response to a secondary inflammatory insult, demonstrating that radiation can lead to long-lasting molecular reprogramming of microglia. Transcriptomic analysis of postmortem normal-appearing non-tumor brain tissue of patients with glioblastoma indicates that radiation-induced microglial priming is likely conserved in humans. Targeting microglial priming or avoiding further inflammatory insults could decrease radiotherapy-induced neurotoxicity.
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Affiliation(s)
- Daniëlle C Voshart
- Department of Biomedical Sciences, Section of Molecular Cell Biology, University Medical Center Groningen, University of Groningen, 9700 AD Groningen, the Netherlands; Department of Radiation Oncology, University Medical Center Groningen, University of Groningen, 9700 RB Groningen, the Netherlands
| | - Takuya Oshima
- Department of Biomedical Sciences, Section of Molecular Neurobiology, University Medical Center Groningen, University of Groningen, 9700 AD Groningen, the Netherlands
| | - Yuting Jiang
- Department of Biomedical Sciences, Section of Molecular Cell Biology, University Medical Center Groningen, University of Groningen, 9700 AD Groningen, the Netherlands; Department of Radiation Oncology, University Medical Center Groningen, University of Groningen, 9700 RB Groningen, the Netherlands
| | - Gideon P van der Linden
- Department of Biomedical Sciences, Section of Molecular Cell Biology, University Medical Center Groningen, University of Groningen, 9700 AD Groningen, the Netherlands; Department of Radiation Oncology, University Medical Center Groningen, University of Groningen, 9700 RB Groningen, the Netherlands
| | - Anna P Ainslie
- Department of Biomedical Sciences, Section of Molecular Cell Biology, University Medical Center Groningen, University of Groningen, 9700 AD Groningen, the Netherlands; Department of Radiation Oncology, University Medical Center Groningen, University of Groningen, 9700 RB Groningen, the Netherlands; European Research Institute for the Biology of Ageing (ERIBA), University Medical Center Groningen, University of Groningen, 9700 AD Groningen, the Netherlands
| | - Luiza Reali Nazario
- Department of Biomedical Sciences, Section of Molecular Cell Biology, University Medical Center Groningen, University of Groningen, 9700 AD Groningen, the Netherlands; Department of Radiation Oncology, University Medical Center Groningen, University of Groningen, 9700 RB Groningen, the Netherlands
| | - Fleur van Buuren-Broek
- Department of Biomedical Sciences, Section of Molecular Cell Biology, University Medical Center Groningen, University of Groningen, 9700 AD Groningen, the Netherlands; Department of Radiation Oncology, University Medical Center Groningen, University of Groningen, 9700 RB Groningen, the Netherlands
| | - Ayla C Scholma
- Department of Biomedical Sciences, Section of Molecular Cell Biology, University Medical Center Groningen, University of Groningen, 9700 AD Groningen, the Netherlands; Department of Radiation Oncology, University Medical Center Groningen, University of Groningen, 9700 RB Groningen, the Netherlands
| | - Hilmar R J van Weering
- Department of Biomedical Sciences, Section of Molecular Neurobiology, University Medical Center Groningen, University of Groningen, 9700 AD Groningen, the Netherlands
| | - Nieske Brouwer
- Department of Biomedical Sciences, Section of Molecular Neurobiology, University Medical Center Groningen, University of Groningen, 9700 AD Groningen, the Netherlands
| | - Jeffrey Sewdihal
- Department of Biomedical Sciences, Section of Molecular Cell Biology, University Medical Center Groningen, University of Groningen, 9700 AD Groningen, the Netherlands; Department of Radiation Oncology, University Medical Center Groningen, University of Groningen, 9700 RB Groningen, the Netherlands
| | - Uilke Brouwer
- Department of Biomedical Sciences, Section of Molecular Cell Biology, University Medical Center Groningen, University of Groningen, 9700 AD Groningen, the Netherlands; Department of Radiation Oncology, University Medical Center Groningen, University of Groningen, 9700 RB Groningen, the Netherlands
| | - Rob P Coppes
- Department of Biomedical Sciences, Section of Molecular Cell Biology, University Medical Center Groningen, University of Groningen, 9700 AD Groningen, the Netherlands; Department of Radiation Oncology, University Medical Center Groningen, University of Groningen, 9700 RB Groningen, the Netherlands
| | - Inge R Holtman
- Department of Biomedical Sciences, Section of Molecular Neurobiology, University Medical Center Groningen, University of Groningen, 9700 AD Groningen, the Netherlands
| | - Bart J L Eggen
- Department of Biomedical Sciences, Section of Molecular Neurobiology, University Medical Center Groningen, University of Groningen, 9700 AD Groningen, the Netherlands
| | - Susanne M Kooistra
- Department of Biomedical Sciences, Section of Molecular Neurobiology, University Medical Center Groningen, University of Groningen, 9700 AD Groningen, the Netherlands
| | - Lara Barazzuol
- Department of Biomedical Sciences, Section of Molecular Cell Biology, University Medical Center Groningen, University of Groningen, 9700 AD Groningen, the Netherlands; Department of Radiation Oncology, University Medical Center Groningen, University of Groningen, 9700 RB Groningen, the Netherlands.
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11
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Ren J, Zhang Y, Pan H, Shi R, Zhu H, Yang R, Zhang L, Chen B, Zhu T, Lu X, Huang C. Mobilization of the innate immune response by a specific immunostimulant β-glucan confers resistance to chronic stress-induced depression-like behavior by preventing neuroinflammatory responses. Int Immunopharmacol 2024; 127:111405. [PMID: 38118316 DOI: 10.1016/j.intimp.2023.111405] [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: 09/07/2023] [Revised: 12/12/2023] [Accepted: 12/14/2023] [Indexed: 12/22/2023]
Abstract
Pre-stimulation of the innate immune response is an effective strategy to prevent depression-like phenotypes in animals. However, the use of conventional immunostimulants may cause adverse effects. Therefore, the search for agents that stimulate the innate immune response but do not induce a pro-inflammatory response could be a new research direction for the prevention of depression. β-glucan is a polysaccharide from Saccharomyces cerevisiae with unique immunomodulatory activity in microglia without eliciting a pro-inflammatory response that could lead to tissue damage. This suggests that β-glucan may be a suitable drug that can be used to prevent depression-like phenotypes. Our results showed that a single injection of β-glucan 1 day before stress exposure at a dose of 10 or 20 mg/kg, but notat a dose of 5 mg/kg, prevented depression-like behavior in mice treated with chronic unpredictable stress (CUS). This effect of β-glucan disappeared when the time interval between β-glucan and stress was extended from 1 day or 5 days to 10 days, which was rescued by a second injection 10 days after the first injection or by a repeated injection (4×, once daily) 10 days before stress exposure. A single β-glucan injection (20 mg/kg) 1 day before stress exposure prevented the CUS-induced increase in brain pro-inflammatory cytokines, and inhibition of the innate immune response by minocycline (40 mg/kg) abolished the preventive effect of β-glucan on CUS-induced depression-like behaviors and neuroinflammatory responses. These results suggest that β-glucan may prevent chronic stress-induced depression-like phenotypes and neuroinflammatory responses by stimulating the innate immune response.
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Affiliation(s)
- Jie Ren
- Department of Pharmacology, School of Pharmacy, Nantong University, #19 Qixiu Road, Nantong 226001, Jiangsu, China
| | - Yi Zhang
- Department of Pharmacology, School of Pharmacy, Nantong University, #19 Qixiu Road, Nantong 226001, Jiangsu, China
| | - Hainan Pan
- Department of Pharmacology, School of Pharmacy, Nantong University, #19 Qixiu Road, Nantong 226001, Jiangsu, China
| | - Ruiting Shi
- Faculty of Humanities and Social Sciences, City University of Macau, Av. Parde Tomas Pereira, Taipa 999078, Macau
| | - Haojie Zhu
- Department of Pharmacology, School of Pharmacy, Nantong University, #19 Qixiu Road, Nantong 226001, Jiangsu, China
| | - Rongrong Yang
- Department of Anesthesiology, Affiliated Hospital of Nantong University, Nantong, Jiangsu 226001, China
| | - Lin Zhang
- Department of Pharmacology, School of Pharmacy, Nantong University, #19 Qixiu Road, Nantong 226001, Jiangsu, China; Department of Pharmacy, Affiliated Maternal and Child Health Hospital of Nantong University, #399 Shiji Dadao, Nantong 226007, Jiangsu, China
| | - Bingran Chen
- Department of Pharmacology, School of Pharmacy, Nantong University, #19 Qixiu Road, Nantong 226001, Jiangsu, China
| | - Tao Zhu
- Department of Pharmacology, School of Pharmacy, Nantong University, #19 Qixiu Road, Nantong 226001, Jiangsu, China
| | - Xu Lu
- Department of Pharmacology, School of Pharmacy, Nantong University, #19 Qixiu Road, Nantong 226001, Jiangsu, China.
| | - Chao Huang
- Department of Pharmacology, School of Pharmacy, Nantong University, #19 Qixiu Road, Nantong 226001, Jiangsu, China.
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12
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Ye S, Lyu Y, Chen L, Wang Y, He Y, Li Q, Tian L, Liu F, Wang X, Ai F. Construction of a molecular inflammatory predictive model with histone modification-related genes and identification of CAMK2D as a potential response signature to infliximab in ulcerative colitis. Front Immunol 2024; 14:1282136. [PMID: 38274809 PMCID: PMC10808628 DOI: 10.3389/fimmu.2023.1282136] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2023] [Accepted: 12/19/2023] [Indexed: 01/27/2024] Open
Abstract
Background Ulcerative colitis (UC) is a lifelong inflammatory disease affecting the rectum and colon with numerous treatment options that require an individualized treatment plan. Histone modifications regulate chromosome structure and gene expression, resulting in effects on inflammatory and immune responses. However, the relationship between histone modification-related genes and UC remains unclear. Methods Transcriptomic data from GSE59071 and GSE66407 were obtained from the Gene Expression Omnibus (GEO), encompassing colonic biopsy expression profiles of UC patients in inflamed and non-inflamed status. Differentially expressed gene (DEG) analyses, functional enrichment analyses, weighted gene co-expression network analysis (WGCNA), and random forest were performed to identify histone modification-related core genes associated with UC inflammation. Features were screened through the least absolute shrinkage and selection operator (LASSO) and support vector machine-recursive feature elimination (SVM-RFE), establishing a molecular inflammatory predictive model using logistic regression. The model was validated in the GSE107499 dataset, and the performance of the features was assessed using receiver operating characteristic (ROC) and calibration curves. Immunohistochemistry (IHC) staining of colonic biopsy tissues from UC patients treated with infliximab was used to further confirm the clinical application value. Univariate logistic regression on GSE14580 highlighted features linked to infliximab response. Results A total of 253 histone modification-related DEGs were identified between inflammatory and non-inflammatory patients with UC. Seven key genes (IL-1β, MSL3, HDAC7, IRF4, CAMK2D, AUTS2, and PADI2) were selected using WGCNA and random forest. Through univariate logistic regression, three core genes (CAMK2D, AUTS2, and IL-1β) were further incorporated to construct the molecular inflammatory predictive model. The area under the curve (AUC) of the model was 0.943 in the independent validation dataset. A significant association between CAMK2D protein expression and infliximab response was observed, which was validated in another independent verification set of GSE14580 from the GEO database. Conclusion The molecular inflammatory predictive model based on CAMK2D, AUTS2, and IL-1β could reliably distinguish the mucosal inflammatory status of UC patients. We further revealed that CAMK2D was a predictive marker of infliximab response. These findings are expected to provide a new evidence base for personalized treatment and management strategies for UC patients.
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Affiliation(s)
- Shuyu Ye
- Department of Gastroenterology, The Third Xiangya Hospital of Central South University, Changsha, China
- Hunan Key Laboratory of Non-Resolving Inflammation and Cancer, The Third Xiangya Hospital, Central South University, Changsha, China
| | - Yongqing Lyu
- Center for Medical Genetics and Hunan Key Laboratory of Medical Genetics, School of Life Sciences, Central South University, Changsha, Hunan, China
| | - Libin Chen
- Department of Gastroenterology, The Third Xiangya Hospital of Central South University, Changsha, China
- Hunan Key Laboratory of Non-Resolving Inflammation and Cancer, The Third Xiangya Hospital, Central South University, Changsha, China
| | - Yiwei Wang
- Department of Gastroenterology, The Third Xiangya Hospital of Central South University, Changsha, China
- Xiangya School of Medicine, Central South University, Changsha, Hunan, China
| | - Yue He
- Department of Gastroenterology, The Third Xiangya Hospital of Central South University, Changsha, China
- Xiangya School of Medicine, Central South University, Changsha, Hunan, China
| | - Quansi Li
- Department of Gastroenterology, The Third Xiangya Hospital of Central South University, Changsha, China
- Xiangya School of Medicine, Central South University, Changsha, Hunan, China
| | - Li Tian
- Department of Gastroenterology, The Third Xiangya Hospital of Central South University, Changsha, China
- Hunan Key Laboratory of Non-Resolving Inflammation and Cancer, The Third Xiangya Hospital, Central South University, Changsha, China
| | - Fen Liu
- Department of Gastroenterology, The Third Xiangya Hospital of Central South University, Changsha, China
- Hunan Key Laboratory of Non-Resolving Inflammation and Cancer, The Third Xiangya Hospital, Central South University, Changsha, China
| | - Xiaoyan Wang
- Department of Gastroenterology, The Third Xiangya Hospital of Central South University, Changsha, China
- Hunan Key Laboratory of Non-Resolving Inflammation and Cancer, The Third Xiangya Hospital, Central South University, Changsha, China
| | - Feiyan Ai
- Department of Gastroenterology, The Third Xiangya Hospital of Central South University, Changsha, China
- Hunan Key Laboratory of Non-Resolving Inflammation and Cancer, The Third Xiangya Hospital, Central South University, Changsha, China
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13
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Steinberg N, Galleguillos D, Zaidi A, Horkey M, Sipione S. Naïve Huntington's disease microglia mount a normal response to inflammatory stimuli but display a partially impaired development of innate immune tolerance that can be counteracted by ganglioside GM1. J Neuroinflammation 2023; 20:276. [PMID: 37996924 PMCID: PMC10668379 DOI: 10.1186/s12974-023-02963-y] [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: 03/07/2023] [Accepted: 11/18/2023] [Indexed: 11/25/2023] Open
Abstract
Chronic activation and dysfunction of microglia have been implicated in the pathogenesis and progression of many neurodegenerative disorders, including Huntington's disease (HD). HD is a genetic condition caused by a mutation that affects the folding and function of huntingtin (HTT). Signs of microglia activation have been observed in HD patients even before the onset of symptoms. It is unclear, however, whether pro-inflammatory microglia activation in HD results from cell-autonomous expression of mutant HTT, is the response of microglia to a diseased brain environment, or both. In this study, we used primary microglia isolated from HD knock-in (Q140) and wild-type (Q7) mice to investigate their response to inflammatory conditions in vitro in the absence of confounding effects arising from brain pathology. We show that naïve Q140 microglia do not undergo spontaneous pro-inflammatory activation and respond to inflammatory triggers, including stimulation of TLR4 and TLR2 and exposure to necrotic cells, with similar kinetics of pro-inflammatory gene expression as wild-type microglia. Upon termination of the inflammatory insult, the transcription of pro-inflammatory cytokines is tapered off in Q140 and wild-type microglia with similar kinetics. However, the ability of Q140 microglia to develop tolerance in response to repeated inflammatory stimulations is partially impaired in vitro and in vivo, potentially contributing to the establishment of chronic neuroinflammation in HD. We further show that ganglioside GM1, a glycosphingolipid with anti-inflammatory effects on wild-type microglia, not only decreases the production of pro-inflammatory cytokines and nitric oxide in activated Q140 microglia, but also dramatically dampen microglia response to re-stimulation with LPS in an experimental model of tolerance. These effects are independent from the expression of interleukin 1 receptor associated kinase 3 (Irak-3), a strong modulator of LPS signaling involved in the development of innate immune tolerance and previously shown to be upregulated by immune cell treatment with gangliosides. Altogether, our data suggest that external triggers are required for HD microglia activation, but a cell-autonomous dysfunction that affects the ability of HD microglia to acquire tolerance might contribute to the establishment of neuroinflammation in HD. Administration of GM1 might be beneficial to attenuate chronic microglia activation and neuroinflammation.
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Affiliation(s)
- Noam Steinberg
- Department of Pharmacology, Neuroscience and Mental Health Institute and Glycomics Institute of Alberta, University of Alberta, Edmonton, AB, Canada
| | - Danny Galleguillos
- Department of Pharmacology, Neuroscience and Mental Health Institute and Glycomics Institute of Alberta, University of Alberta, Edmonton, AB, Canada
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Asifa Zaidi
- Department of Pharmacology, Neuroscience and Mental Health Institute and Glycomics Institute of Alberta, University of Alberta, Edmonton, AB, Canada
| | | | - Simonetta Sipione
- Department of Pharmacology, Neuroscience and Mental Health Institute and Glycomics Institute of Alberta, University of Alberta, Edmonton, AB, Canada.
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14
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Schwabenland M, Mossad O, Sievert A, Peres AG, Ringel E, Baasch S, Kolter J, Cascone G, Dokalis N, Vlachos A, Ruzsics Z, Henneke P, Prinz M, Blank T. Neonatal immune challenge poses a sex-specific risk for epigenetic microglial reprogramming and behavioral impairment. Nat Commun 2023; 14:2721. [PMID: 37169749 PMCID: PMC10175500 DOI: 10.1038/s41467-023-38373-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2020] [Accepted: 04/27/2023] [Indexed: 05/13/2023] Open
Abstract
While the precise processes underlying a sex bias in the development of central nervous system (CNS) disorders are unknown, there is growing evidence that an early life immune activation can contribute to the disease pathogenesis. When we mimicked an early systemic viral infection or applied murine cytomegalovirus (MCMV) systemically in neonatal female and male mice, only male adolescent mice presented behavioral deficits, including reduced social behavior and cognition. This was paralleled by an increased amount of infiltrating T cells in the brain parenchyma, enhanced interferon-γ (IFNγ) signaling, and epigenetic reprogramming of microglial cells. These microglial cells showed increased phagocytic activity, which resulted in abnormal loss of excitatory synapses within the hippocampal brain region. None of these alterations were seen in female adolescent mice. Our findings underscore the early postnatal period's susceptibility to cause sex-dependent long-term CNS deficiencies following infections.
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Affiliation(s)
- Marius Schwabenland
- Institute of Neuropathology, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Omar Mossad
- Institute of Neuropathology, Faculty of Medicine, University of Freiburg, Freiburg, Germany
- Faculty of Biology, University of Freiburg, Freiburg, Germany
| | - Annika Sievert
- Institute of Neuropathology, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Adam G Peres
- Institute of Neuropathology, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Elena Ringel
- Institute of Neuropathology, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Sebastian Baasch
- Institute for Immunodeficiency, Center for Chronic Immunodeficiency (CCI), Medical Center, University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Julia Kolter
- Institute for Immunodeficiency, Center for Chronic Immunodeficiency (CCI), Medical Center, University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Giulia Cascone
- Institute of Neuropathology, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Nikolaos Dokalis
- Institute of Neuropathology, Faculty of Medicine, University of Freiburg, Freiburg, Germany
- Faculty of Biology, University of Freiburg, Freiburg, Germany
| | - Andreas Vlachos
- Department of Neuroanatomy, Institute of Anatomy and Cell Biology, Faculty of Medicine, University of Freiburg, Freiburg, Germany
- Center for Basics in Neuromodulation (NeuroModulBasics), Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Zsolt Ruzsics
- Institute for Virology, Faculty of Medicine, Medical Center, University of Freiburg, Freiburg, Germany
| | - Philipp Henneke
- Institute for Immunodeficiency, Center for Chronic Immunodeficiency (CCI), Medical Center, University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
- Center for Pediatrics and Adolescent Medicine, Medical Center, University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
- CIBSS Centre for Integrative Biological Signalling Studies, University of Freiburg, Freiburg, Germany
| | - Marco Prinz
- Institute of Neuropathology, Faculty of Medicine, University of Freiburg, Freiburg, Germany
- Center for Basics in Neuromodulation (NeuroModulBasics), Faculty of Medicine, University of Freiburg, Freiburg, Germany
- Signalling Research Centres BIOSS and CIBSS-Centre for Integrative Biological Signalling Studies, University of Freiburg, Freiburg, Germany
| | - Thomas Blank
- Institute of Neuropathology, Faculty of Medicine, University of Freiburg, Freiburg, Germany.
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15
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Otto-Dobos LD, Santos JC, Strehle LD, Grant CV, Simon LA, Oliver B, Godbout JP, Sheridan JF, Barrientos RM, Glasper ER, Pyter LM. The role of microglia in 67NR mammary tumor-induced suppression of brain responses to immune challenges in female mice. J Neurochem 2023:10.1111/jnc.15830. [PMID: 37084026 PMCID: PMC10589388 DOI: 10.1111/jnc.15830] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2023] [Revised: 03/31/2023] [Accepted: 04/04/2023] [Indexed: 04/22/2023]
Abstract
It is poorly understood how solid peripheral tumors affect brain neuroimmune responses despite the various brain-mediated side effects and higher rates of infection reported in cancer patients. We hypothesized that chronic low-grade peripheral tumor-induced inflammation conditions microglia to drive suppression of neuroinflammatory responses to a subsequent peripheral immune challenge. Here, Balb/c murine mammary tumors attenuated the microglial inflammatory gene expression responses to lipopolysaccharide (LPS) and live Escherichia coli (E. coli) challenges and the fatigue response to an E. coli infection. In contrast, the inflammatory gene expression in response to LPS or a toll-like receptor 2 agonist of Percoll-enriched primary microglia cultures was comparable between tumor-bearing and -free mice, as were the neuroinflammatory and sickness behavioral responses to an intracerebroventricular interleukin (IL)-1β injection. These data led to the hypothesis that Balb/c mammary tumors blunt the neuroinflammatory responses to an immune challenge via a mechanism involving tumor suppression of the peripheral humoral response. Balb/c mammary tumors modestly attenuated select circulating cytokine responses to LPS and E. coli challenges. Further, a second mammary tumor/mouse strain model (E0771 tumors in C57Bl/6 mice) displayed mildly elevated inflammatory responses to an immune challenge. Taken together, these data indicate that tumor-induced suppression of neuroinflammation and sickness behaviors may be driven by a blunted microglial phenotype, partly because of an attenuated peripheral signal to the brain, which may contribute to infection responses and behavioral side effects reported in cancer patients. Finally, these neuroimmune effects likely vary based on tumor type and/or host immune phenotype.
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Affiliation(s)
- L D Otto-Dobos
- Institute for Behavioral Medicine Research, The Ohio State University, Columbus, Ohio, USA
| | - J C Santos
- Institute for Behavioral Medicine Research, The Ohio State University, Columbus, Ohio, USA
| | - L D Strehle
- Institute for Behavioral Medicine Research, The Ohio State University, Columbus, Ohio, USA
| | - C V Grant
- Institute for Behavioral Medicine Research, The Ohio State University, Columbus, Ohio, USA
| | - L A Simon
- Institute for Behavioral Medicine Research, The Ohio State University, Columbus, Ohio, USA
| | - B Oliver
- Institute for Behavioral Medicine Research, The Ohio State University, Columbus, Ohio, USA
| | - J P Godbout
- Institute for Behavioral Medicine Research, The Ohio State University, Columbus, Ohio, USA
- Department of Neuroscience, The Ohio State University, Columbus, Ohio, USA
- Chronic Brain Injury Program, The Ohio State University, Columbus, Ohio, USA
| | - J F Sheridan
- Institute for Behavioral Medicine Research, The Ohio State University, Columbus, Ohio, USA
- Department of Neuroscience, The Ohio State University, Columbus, Ohio, USA
- Division of Biosciences College of Dentistry, The Ohio State University, Columbus, Ohio, USA
| | - R M Barrientos
- Institute for Behavioral Medicine Research, The Ohio State University, Columbus, Ohio, USA
- Department of Neuroscience, The Ohio State University, Columbus, Ohio, USA
- Chronic Brain Injury Program, The Ohio State University, Columbus, Ohio, USA
- Department of Psychiatry and Behavioral Health, The Ohio State University, Columbus, Ohio, USA
| | - E R Glasper
- Institute for Behavioral Medicine Research, The Ohio State University, Columbus, Ohio, USA
- Department of Neuroscience, The Ohio State University, Columbus, Ohio, USA
| | - L M Pyter
- Institute for Behavioral Medicine Research, The Ohio State University, Columbus, Ohio, USA
- Department of Neuroscience, The Ohio State University, Columbus, Ohio, USA
- Department of Psychiatry and Behavioral Health, The Ohio State University, Columbus, Ohio, USA
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16
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Yu H, Kan J, Tang M, Zhu Y, Hu B. Lipopolysaccharide Preconditioning Restricts Microglial Overactivation and Alleviates Inflammation-Induced Depressive-like Behavior in Mice. Brain Sci 2023; 13:brainsci13040549. [PMID: 37190515 DOI: 10.3390/brainsci13040549] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2023] [Revised: 03/20/2023] [Accepted: 03/23/2023] [Indexed: 03/29/2023] Open
Abstract
Overactive microglia and severe neuroinflammation play crucial roles in the development of major depressive disorder. Preconditioning with lipopolysaccharide (LPS) provides protection against severe neuroinflammation. However, administering high doses of LPS to mice triggers depressive symptoms. Therefore, the optimal dose of LPS preconditioning needs to be determined by further experiments. LPS preconditioning is an effective agent in anti-inflammation and neuroprotection, but the mechanism by which LPS preconditioning acts in depression remain unclear. This study finds that the anti-inflammation mechanism of low-dose LPS preconditioning is mainly dependent on G-protein-coupled receptor 84 (GPR84). We use low-dose LPS for preconditioning and re-challenged mice or BV2 microglia with high-dose LPS. In addition, RNA-seq is used to explore underlying changes with LPS preconditioning. Low-dose LPS preconditioning reduces the expression of pro-inflammatory mediators and inhibits microglial activation, as well as suppresses the depressive-like behavior when the mice are re-challenged with high-dose LPS. Further investigation reveals that the tolerance-like response in microglia is dependent on the GPR84. Here, we show that low-dose LPS preconditioning can exert anti-inflammation effects and alleviates inflammation-induced depressive-like behavior in mice. As a potential therapeutic target for depression, LPS preconditioning needs to be given further attention regarding its effectiveness and safety.
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17
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Lajqi T, Köstlin-Gille N, Bauer R, Zarogiannis SG, Lajqi E, Ajeti V, Dietz S, Kranig SA, Rühle J, Demaj A, Hebel J, Bartosova M, Frommhold D, Hudalla H, Gille C. Training vs. Tolerance: The Yin/Yang of the Innate Immune System. Biomedicines 2023; 11:biomedicines11030766. [PMID: 36979747 PMCID: PMC10045728 DOI: 10.3390/biomedicines11030766] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2023] [Revised: 02/26/2023] [Accepted: 02/27/2023] [Indexed: 03/06/2023] Open
Abstract
For almost nearly a century, memory functions have been attributed only to acquired immune cells. Lately, this paradigm has been challenged by an increasing number of studies revealing that innate immune cells are capable of exhibiting memory-like features resulting in increased responsiveness to subsequent challenges, a process known as trained immunity (known also as innate memory). In contrast, the refractory state of endotoxin tolerance has been defined as an immunosuppressive state of myeloid cells portrayed by a significant reduction in the inflammatory capacity. Both training as well tolerance as adaptive features are reported to be accompanied by epigenetic and metabolic alterations occurring in cells. While training conveys proper protection against secondary infections, the induction of endotoxin tolerance promotes repairing mechanisms in the cells. Consequently, the inappropriate induction of these adaptive cues may trigger maladaptive effects, promoting an increased susceptibility to secondary infections—tolerance, or contribute to the progression of the inflammatory disorder—trained immunity. This review aims at the discussion of these opposing manners of innate immune and non-immune cells, describing the molecular, metabolic and epigenetic mechanisms involved and interpreting the clinical implications in various inflammatory pathologies.
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Affiliation(s)
- Trim Lajqi
- Department of Neonatology, Heidelberg University Children’s Hospital, D-69120 Heidelberg, Germany
- Correspondence: (T.L.); (C.G.)
| | - Natascha Köstlin-Gille
- Department of Neonatology, Heidelberg University Children’s Hospital, D-69120 Heidelberg, Germany
- Department of Neonatology, University of Tübingen, D-72076 Tübingen, Germany
| | - Reinhard Bauer
- Institute of Molecular Cell Biology, Jena University Hospital, D-07745 Jena, Germany
| | - Sotirios G. Zarogiannis
- Department of Physiology, School of Health Sciences, Faculty of Medicine, University of Thessaly, GR-41500 Larissa, Greece
| | - Esra Lajqi
- Department of Radiation Oncology, Heidelberg University Hospital, D-69120 Heidelberg, Germany
| | - Valdrina Ajeti
- Department of Pharmacy, Alma Mater Europaea—Campus College Rezonanca, XK-10000 Pristina, Kosovo
| | - Stefanie Dietz
- Department of Neonatology, Heidelberg University Children’s Hospital, D-69120 Heidelberg, Germany
- Department of Neonatology, University of Tübingen, D-72076 Tübingen, Germany
| | - Simon A. Kranig
- Department of Neonatology, Heidelberg University Children’s Hospital, D-69120 Heidelberg, Germany
| | - Jessica Rühle
- Department of Neonatology, University of Tübingen, D-72076 Tübingen, Germany
| | - Ardian Demaj
- Faculty of Medical Sciences, University of Tetovo, MK-1200 Tetova, North Macedonia
| | - Janine Hebel
- Department of Neonatology, University of Tübingen, D-72076 Tübingen, Germany
| | - Maria Bartosova
- Center for Pediatric and Adolescent Medicine Heidelberg, University of Heidelberg, D-69120 Heidelberg, Germany
| | - David Frommhold
- Klinik für Kinderheilkunde und Jugendmedizin, D-87700 Memmingen, Germany
| | - Hannes Hudalla
- Department of Neonatology, Heidelberg University Children’s Hospital, D-69120 Heidelberg, Germany
| | - Christian Gille
- Department of Neonatology, Heidelberg University Children’s Hospital, D-69120 Heidelberg, Germany
- Correspondence: (T.L.); (C.G.)
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18
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Zhao T, Wang D, Wu D, Du J, Zhao M, Peng F, Zhang M, Zhou W, Hao A. Astilbin attenuates neonatal postnatal immune activation-induced long-lasting cognitive impairment in adult mice. J Funct Foods 2023. [DOI: 10.1016/j.jff.2023.105434] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2023] Open
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19
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Nass SR, Hahn YK, Ohene-Nyako M, McLane VD, Damaj MI, Thacker LR, Knapp PE, Hauser KF. Depressive-like Behavior Is Accompanied by Prefrontal Cortical Innate Immune Fatigue and Dendritic Spine Losses after HIV-1 Tat and Morphine Exposure. Viruses 2023; 15:v15030590. [PMID: 36992299 PMCID: PMC10052300 DOI: 10.3390/v15030590] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2022] [Revised: 02/06/2023] [Accepted: 02/09/2023] [Indexed: 02/23/2023] Open
Abstract
Opioid use disorder (OUD) and HIV are comorbid epidemics that can increase depression. HIV and the viral protein Tat can directly induce neuronal injury within reward and emotionality brain circuitry, including the prefrontal cortex (PFC). Such damage involves both excitotoxic mechanisms and more indirect pathways through neuroinflammation, both of which can be worsened by opioid co-exposure. To assess whether excitotoxicity and/or neuroinflammation might drive depressive behaviors in persons infected with HIV (PWH) and those who use opioids, male mice were exposed to HIV-1 Tat for eight weeks, given escalating doses of morphine during the last two weeks, and assessed for depressive-like behavior. Tat expression decreased sucrose consumption and adaptability, whereas morphine administration increased chow consumption and exacerbated Tat-induced decreases in nesting and burrowing—activities associated with well-being. Across all treatment groups, depressive-like behavior correlated with increased proinflammatory cytokines in the PFC. Nevertheless, supporting the theory that innate immune responses adapt to chronic Tat exposure, most proinflammatory cytokines were unaffected by Tat or morphine. Further, Tat increased PFC levels of the anti-inflammatory cytokine IL-10, which were exacerbated by morphine administration. Tat, but not morphine, decreased dendritic spine density on layer V pyramidal neurons in the anterior cingulate. Together, our findings suggest that HIV-1 Tat and morphine differentially induce depressive-like behaviors associated with increased neuroinflammation, synaptic losses, and immune fatigue within the PFC.
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Affiliation(s)
- Sara R. Nass
- Department of Pharmacology and Toxicology, Medical College of Virginia (MCV) Campus, Virginia Commonwealth University, Richmond, VA 23298-0613, USA
| | - Yun K. Hahn
- Department of Anatomy and Neurobiology, Medical College of Virginia (MCV) Campus, Virginia Commonwealth University, Richmond, VA 23298-0709, USA
| | - Michael Ohene-Nyako
- Department of Pharmacology and Toxicology, Medical College of Virginia (MCV) Campus, Virginia Commonwealth University, Richmond, VA 23298-0613, USA
| | - Virginia D. McLane
- Department of Pharmacology and Toxicology, Medical College of Virginia (MCV) Campus, Virginia Commonwealth University, Richmond, VA 23298-0613, USA
| | - M. Imad Damaj
- Department of Pharmacology and Toxicology, Medical College of Virginia (MCV) Campus, Virginia Commonwealth University, Richmond, VA 23298-0613, USA
| | - Leroy R. Thacker
- Department of Biostatistics, Medical College of Virginia (MCV) Campus, Virginia Commonwealth University, Richmond, VA 23219, USA
| | - Pamela E. Knapp
- Department of Pharmacology and Toxicology, Medical College of Virginia (MCV) Campus, Virginia Commonwealth University, Richmond, VA 23298-0613, USA
- Department of Anatomy and Neurobiology, Medical College of Virginia (MCV) Campus, Virginia Commonwealth University, Richmond, VA 23298-0709, USA
- Institute for Drug and Alcohol Studies, Medical College of Virginia (MCV) Campus, Virginia Commonwealth University, Richmond, VA 23298-0059, USA
| | - Kurt F. Hauser
- Department of Pharmacology and Toxicology, Medical College of Virginia (MCV) Campus, Virginia Commonwealth University, Richmond, VA 23298-0613, USA
- Department of Anatomy and Neurobiology, Medical College of Virginia (MCV) Campus, Virginia Commonwealth University, Richmond, VA 23298-0709, USA
- Institute for Drug and Alcohol Studies, Medical College of Virginia (MCV) Campus, Virginia Commonwealth University, Richmond, VA 23298-0059, USA
- Correspondence: ; Tel.: +1-804-628-7579; Fax: +1-804-828-0676
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20
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Huang Z. A Function of Amyloid-β in Mediating Activity-Dependent Axon/Synapse Competition May Unify Its Roles in Brain Physiology and Pathology. J Alzheimers Dis 2023; 92:29-57. [PMID: 36710681 PMCID: PMC10023438 DOI: 10.3233/jad-221042] [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: 01/28/2023]
Abstract
Amyloid-β protein precursor (AβPP) gives rise to amyloid-β (Aβ), a peptide at the center of Alzheimer's disease (AD). AβPP, however, is also an ancient molecule dating back in evolution to some of the earliest forms of metazoans. This suggests a possible ancestral function that may have been obscured by those that evolve later. Based on literature from the functions of Aβ/AβPP in nervous system development, plasticity, and disease, to those of anti-microbial peptides (AMPs) in bacterial competition as well as mechanisms of cell competition uncovered first by Drosophila genetics, I propose that Aβ/AβPP may be part of an ancient mechanism employed in cell competition, which is subsequently co-opted during evolution for the regulation of activity-dependent neural circuit development and plasticity. This hypothesis is supported by foremost the high similarities of Aβ to AMPs, both of which possess unique, opposite (i.e., trophic versus toxic) activities as monomers and oligomers. A large body of data further suggests that the different Aβ oligomeric isoforms may serve as the protective and punishment signals long predicted to mediate activity-dependent axonal/synaptic competition in the developing nervous system and that the imbalance in their opposite regulation of innate immune and glial cells in the brain may ultimately underpin AD pathogenesis. This hypothesis can not only explain the diverse roles observed of Aβ and AβPP family molecules, but also provide a conceptual framework that can unify current hypotheses on AD. Furthermore, it may explain major clinical observations not accounted for and identify approaches for overcoming shortfalls in AD animal modeling.
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Affiliation(s)
- Zhen Huang
- Departments of Neuroscience and Neurology, University of Wisconsin-Madison, Madison, WI, USA
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21
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Larosa A, Wong TP. The hippocampus in stress susceptibility and resilience: Reviewing molecular and functional markers. Prog Neuropsychopharmacol Biol Psychiatry 2022; 119:110601. [PMID: 35842073 DOI: 10.1016/j.pnpbp.2022.110601] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/21/2022] [Revised: 06/22/2022] [Accepted: 07/10/2022] [Indexed: 10/17/2022]
Abstract
Understanding the individual variability that comes with the likelihood of developing stress-related psychopathologies is of paramount importance when addressing mechanisms of their neurobiology. This article focuses on the hippocampus as a region that is highly influenced by chronic stress exposure and that has strong ties to the development of related disorders, such as depression and post-traumatic stress disorder. We first outline three commonly used animal models that have been used to separate animals into susceptible and resilient cohorts. Next, we review molecular and functional hippocampal markers of susceptibility and resilience. We propose that the hippocampus plays a crucial role in the differences in the processing and storage of stress-related information in animals with different stress susceptibilities. These hippocampal markers not only help us attain a more comprehensive understanding of the various facets of stress-related pathophysiology, but also could be targeted for the development of new treatments.
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Affiliation(s)
- Amanda Larosa
- Neuroscience Division, Douglas Research Centre, Montreal, QC, Canada; Integrated Program in Neuroscience, McGill University, Montreal, QC, Canada
| | - Tak Pan Wong
- Neuroscience Division, Douglas Research Centre, Montreal, QC, Canada; Dept. of Psychiatry, McGill University, Montreal, QC, Canada.
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22
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Reemst K, Kracht L, Kotah JM, Rahimian R, van Irsen AAS, Congrains Sotomayor G, Verboon LN, Brouwer N, Simard S, Turecki G, Mechawar N, Kooistra SM, Eggen BJL, Korosi A. Early-life stress lastingly impacts microglial transcriptome and function under basal and immune-challenged conditions. Transl Psychiatry 2022; 12:507. [PMID: 36481769 PMCID: PMC9731997 DOI: 10.1038/s41398-022-02265-6] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/11/2022] [Revised: 11/18/2022] [Accepted: 11/23/2022] [Indexed: 12/13/2022] Open
Abstract
Early-life stress (ELS) leads to increased vulnerability to psychiatric disorders including depression later in life. Neuroinflammatory processes have been implicated in ELS-induced negative health outcomes, but how ELS impacts microglia, the main tissue-resident macrophages of the central nervous system, is unknown. Here, we determined the effects of ELS-induced by limited bedding and nesting material during the first week of life (postnatal days [P]2-9) on microglial (i) morphology; (ii) hippocampal gene expression; and (iii) synaptosome phagocytic capacity in male pups (P9) and adult (P200) mice. The hippocampus of ELS-exposed adult mice displayed altered proportions of morphological subtypes of microglia, as well as microglial transcriptomic changes related to the tumor necrosis factor response and protein ubiquitination. ELS exposure leads to distinct gene expression profiles during microglial development from P9 to P200 and in response to an LPS challenge at P200. Functionally, synaptosomes from ELS-exposed mice were phagocytosed less by age-matched microglia. At P200, but not P9, ELS microglia showed reduced synaptosome phagocytic capacity when compared to control microglia. Lastly, we confirmed the ELS-induced increased expression of the phagocytosis-related gene GAS6 that we observed in mice, in the dentate gyrus of individuals with a history of child abuse using in situ hybridization. These findings reveal persistent effects of ELS on microglial function and suggest that altered microglial phagocytic capacity is a key contributor to ELS-induced phenotypes.
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Affiliation(s)
- Kitty Reemst
- grid.7177.60000000084992262Swammerdam Institute for Life Sciences, Center for Neuroscience, Brain Plasticity Group, University of Amsterdam, Amsterdam, Science Park 904, 1098 XH The Netherlands
| | - Laura Kracht
- grid.4494.d0000 0000 9558 4598Department of Biomedical Sciences of Cells & Systems, Section Molecular Neurobiology, University of Groningen, University Medical Center Groningen, Antonius Deusinglaan 1, 9713 AV Groningen, The Netherlands
| | - Janssen M. Kotah
- grid.7177.60000000084992262Swammerdam Institute for Life Sciences, Center for Neuroscience, Brain Plasticity Group, University of Amsterdam, Amsterdam, Science Park 904, 1098 XH The Netherlands
| | - Reza Rahimian
- grid.412078.80000 0001 2353 5268McGill Group for Suicide Studies, Douglas Hospital Research Center, Montreal, QC H4H 1R3 Canada ,grid.14709.3b0000 0004 1936 8649Department of Psychiatry, McGill University, Montreal, QC H3A 1A1 Canada
| | - Astrid A. S. van Irsen
- grid.7177.60000000084992262Swammerdam Institute for Life Sciences, Center for Neuroscience, Brain Plasticity Group, University of Amsterdam, Amsterdam, Science Park 904, 1098 XH The Netherlands
| | - Gonzalo Congrains Sotomayor
- grid.7177.60000000084992262Swammerdam Institute for Life Sciences, Center for Neuroscience, Brain Plasticity Group, University of Amsterdam, Amsterdam, Science Park 904, 1098 XH The Netherlands
| | - Laura N. Verboon
- grid.7177.60000000084992262Swammerdam Institute for Life Sciences, Center for Neuroscience, Brain Plasticity Group, University of Amsterdam, Amsterdam, Science Park 904, 1098 XH The Netherlands
| | - Nieske Brouwer
- grid.4494.d0000 0000 9558 4598Department of Biomedical Sciences of Cells & Systems, Section Molecular Neurobiology, University of Groningen, University Medical Center Groningen, Antonius Deusinglaan 1, 9713 AV Groningen, The Netherlands
| | - Sophie Simard
- grid.412078.80000 0001 2353 5268McGill Group for Suicide Studies, Douglas Hospital Research Center, Montreal, QC H4H 1R3 Canada ,grid.14709.3b0000 0004 1936 8649Department of Psychiatry, McGill University, Montreal, QC H3A 1A1 Canada
| | - Gustavo Turecki
- grid.412078.80000 0001 2353 5268McGill Group for Suicide Studies, Douglas Hospital Research Center, Montreal, QC H4H 1R3 Canada ,grid.14709.3b0000 0004 1936 8649Department of Psychiatry, McGill University, Montreal, QC H3A 1A1 Canada
| | - Naguib Mechawar
- grid.412078.80000 0001 2353 5268McGill Group for Suicide Studies, Douglas Hospital Research Center, Montreal, QC H4H 1R3 Canada ,grid.14709.3b0000 0004 1936 8649Department of Psychiatry, McGill University, Montreal, QC H3A 1A1 Canada
| | - Susanne M. Kooistra
- grid.4494.d0000 0000 9558 4598Department of Biomedical Sciences of Cells & Systems, Section Molecular Neurobiology, University of Groningen, University Medical Center Groningen, Antonius Deusinglaan 1, 9713 AV Groningen, The Netherlands
| | - Bart J. L. Eggen
- grid.4494.d0000 0000 9558 4598Department of Biomedical Sciences of Cells & Systems, Section Molecular Neurobiology, University of Groningen, University Medical Center Groningen, Antonius Deusinglaan 1, 9713 AV Groningen, The Netherlands
| | - Aniko Korosi
- Swammerdam Institute for Life Sciences, Center for Neuroscience, Brain Plasticity Group, University of Amsterdam, Amsterdam, Science Park 904, 1098 XH, The Netherlands.
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23
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Innate immune tolerance against adolescent intermittent alcohol exposure-induced behavioral abnormalities in adult mice. Int Immunopharmacol 2022; 113:109250. [DOI: 10.1016/j.intimp.2022.109250] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2022] [Revised: 08/23/2022] [Accepted: 09/09/2022] [Indexed: 11/05/2022]
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24
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Mora VP, Loaiza RA, Soto JA, Bohmwald K, Kalergis AM. Involvement of trained immunity during autoimmune responses. J Autoimmun 2022:102956. [DOI: 10.1016/j.jaut.2022.102956] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2022] [Accepted: 11/14/2022] [Indexed: 12/23/2022]
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25
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Xiao Z, Xie Y, Huang F, Yang J, Liu X, Lin X, Zhu P, Zheng S. MicroRNA-205-5p plays a suppressive role in the high-fat diet-induced atrial fibrosis through regulation of the EHMT2/IGFBP3 axis. GENES & NUTRITION 2022; 17:11. [PMID: 35858845 PMCID: PMC9297569 DOI: 10.1186/s12263-022-00712-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/23/2022] [Accepted: 05/25/2022] [Indexed: 11/28/2022]
Abstract
Objective MicroRNAs (miRNAs) targeting has been revealed to be an appealing strategy for the treatment and management of atrial fibrillation (AF). In this research, we aimed to explore the mechanisms of miR-205-5p in reducing the high-fat diet (HFD)-induced atrial fibrosis through the EHMT2/IGFBP3 axis. Methods Expression levels of miR-205-5p, IGFBP3 and EHMT2 were determined in AF patients, cell fibrosis models and mouse atrial fibrosis models. Luciferase activity and RIP assays were performed to detect the binding between miR-205-5p and EHMT2, and ChIP assays were implemented to detect the enrichment of H3K9me2 and H3K4me3 in the promoter region of IGFBP3 in cells. The related experiments focusing on the inflammatory response, atrial fibrosis, mitochondrial damage, and metabolic abnormalities were performed to figure out the roles of miR-205-5p, IGFBP3, and EHMT2 in cell and mouse atrial fibrosis models. Results Low expression levels of miR-205-5p and IGFBP3 and a high expression of EHMT2 were found in AF patients, cell fibrosis models and mouse atrial fibrosis models. Upregulation of miR-205-5p reduced the expression of TGF-β1, α-SMA, Col III and other fibrosis-related proteins. miR-205-5p overexpression targeted EHMT2 to regulate the methylation of H3 histones to promote IGFBP3 expression, which in turn affected the fibrosis of atrial muscle cells. In HFD-induced atrial fibrosis mice, upregulated miR-205-5p or elevated IGFBP3 alleviated atrial fibrosis, mitochondrial damage, and metabolic abnormalities. Conclusion This study suggests that miR-205-5p attenuates HFD-induced atrial fibrosis via modulating the EHMT2/IGFBP3 axis. Graphical Abstract miR-205-5p alleviates high-fat diet-induced atrial fibrosis in mice via EHMT2/IGFBP3. ![]()
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26
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Paolicelli RC, Sierra A, Stevens B, Tremblay ME, Aguzzi A, Ajami B, Amit I, Audinat E, Bechmann I, Bennett M, Bennett F, Bessis A, Biber K, Bilbo S, Blurton-Jones M, Boddeke E, Brites D, Brône B, Brown GC, Butovsky O, Carson MJ, Castellano B, Colonna M, Cowley SA, Cunningham C, Davalos D, De Jager PL, de Strooper B, Denes A, Eggen BJL, Eyo U, Galea E, Garel S, Ginhoux F, Glass CK, Gokce O, Gomez-Nicola D, González B, Gordon S, Graeber MB, Greenhalgh AD, Gressens P, Greter M, Gutmann DH, Haass C, Heneka MT, Heppner FL, Hong S, Hume DA, Jung S, Kettenmann H, Kipnis J, Koyama R, Lemke G, Lynch M, Majewska A, Malcangio M, Malm T, Mancuso R, Masuda T, Matteoli M, McColl BW, Miron VE, Molofsky AV, Monje M, Mracsko E, Nadjar A, Neher JJ, Neniskyte U, Neumann H, Noda M, Peng B, Peri F, Perry VH, Popovich PG, Pridans C, Priller J, Prinz M, Ragozzino D, Ransohoff RM, Salter MW, Schaefer A, Schafer DP, Schwartz M, Simons M, Smith CJ, Streit WJ, Tay TL, Tsai LH, Verkhratsky A, von Bernhardi R, Wake H, Wittamer V, Wolf SA, Wu LJ, Wyss-Coray T. Microglia states and nomenclature: A field at its crossroads. Neuron 2022; 110:3458-3483. [PMID: 36327895 PMCID: PMC9999291 DOI: 10.1016/j.neuron.2022.10.020] [Citation(s) in RCA: 544] [Impact Index Per Article: 272.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2022] [Revised: 08/06/2022] [Accepted: 10/12/2022] [Indexed: 11/06/2022]
Abstract
Microglial research has advanced considerably in recent decades yet has been constrained by a rolling series of dichotomies such as "resting versus activated" and "M1 versus M2." This dualistic classification of good or bad microglia is inconsistent with the wide repertoire of microglial states and functions in development, plasticity, aging, and diseases that were elucidated in recent years. New designations continuously arising in an attempt to describe the different microglial states, notably defined using transcriptomics and proteomics, may easily lead to a misleading, although unintentional, coupling of categories and functions. To address these issues, we assembled a group of multidisciplinary experts to discuss our current understanding of microglial states as a dynamic concept and the importance of addressing microglial function. Here, we provide a conceptual framework and recommendations on the use of microglial nomenclature for researchers, reviewers, and editors, which will serve as the foundations for a future white paper.
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Affiliation(s)
- Rosa C Paolicelli
- Department of Biomedical Sciences, Faculty of Biology and Medicine, University of Lausanne, Lausanne, Switzerland.
| | - Amanda Sierra
- Achucarro Basque Center for Neuroscience, Glial Cell Biology Lab, Leioa, Spain; Department of Neuroscience, University of the Basque Country EHU/UPV, Leioa, Spain; Ikerbasque Foundation, Bilbao, Spain.
| | - Beth Stevens
- Broad Institute of MIT and Harvard, Cambridge, MA, USA; Howard Hughes Medical Institute, (HHMI), MD, USA; Boston Children's Hospital, Boston, MA, USA.
| | - Marie-Eve Tremblay
- Centre de recherche du CHU de Québec-Université Laval, Québec City, QC, Canada; Department of Neurology and Neurosurgery, McGill University, Montréal, QC, Canada; Division of Medical Sciences, University of Victoria, Victoria, BC, Canada; Center for Advanced Materials and Related Technology (CAMTEC), University of Victoria, Victoria, BC, Canada; Department of Biochemistry and Molecular Biology, University of British Columbia, Vancouver, BC, Canada.
| | - Adriano Aguzzi
- Institute of Neuropathology, University of Zurich, Zurich, Switzerland
| | - Bahareh Ajami
- Department of Molecular Microbiology & Immunology, Department of Behavioral and Systems Neuroscience, Oregon Health & Science University School of Medicine, Portland, OR, USA
| | - Ido Amit
- Department of Systems Immunology, Weizmann Institute of Science, Rehovot, Israel
| | - Etienne Audinat
- Institut de Génomique Fonctionnelle, Université de Montpellier, CNRS, INSERM, Montpellier, France
| | - Ingo Bechmann
- Institute of Anatomy, University of Leipzig, Leipzig, Germany
| | - Mariko Bennett
- Children's Hospital of Philadelphia, Department of Psychiatry, Department of Pediatrics, Division of Child Neurology, Philadelphia, PA, USA
| | - Frederick Bennett
- Children's Hospital of Philadelphia, University of Pennsylvania, Philadelphia, PA, USA
| | - Alain Bessis
- École Normale Supérieure, Institut National de la Santé et de la Recherche Médicale, Centre National de la Recherche Scientifique, Paris Sciences et Lettres Research University, Paris, France
| | - Knut Biber
- Neuroscience Discovery, AbbVie Deutschland GmbH, Ludwigshafen, Germany
| | - Staci Bilbo
- Departments of Psychology & Neuroscience, Neurobiology, and Cell Biology, Duke University, Durham, NC, USA
| | - Mathew Blurton-Jones
- Center for the Neurobiology of Learning and Memory, UCI MIND, University of California, Irvine, CA, USA
| | - Erik Boddeke
- Department Biomedical Sciences of Cells & Systems, Section Molecular Neurobiology, University of Groningen, University Medical Center, Groningen, the Netherlands
| | - Dora Brites
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, Lisbon, Portugal
| | - Bert Brône
- BIOMED Research Institute, University of Hasselt, Hasselt, Belgium
| | - Guy C Brown
- Department of Biochemistry, University of Cambridge, Cambridge, UK
| | - Oleg Butovsky
- Ann Romney Center for Neurologic Diseases, Department Neurology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Monica J Carson
- Center for Glial-Neuronal Interactions, Division of Biomedical Sciences, University of California Riverside School of Medicine, Riverside, CA, USA
| | - Bernardo Castellano
- Unidad de Histología Medica, Depto. Biología Celular, Fisiología e Inmunología, Barcelona, Spain; Instituto de Neurociencias, Universidad Autónoma de Barcelona, Barcelona, Spain
| | - Marco Colonna
- Department of Pathology and Immunology, Washington University School of Medicine in St. Louis, St. Louis, MO, USA
| | - Sally A Cowley
- James and Lillian Martin Centre for Stem Cell Research, Sir William Dunn School of Pathology, University of Oxford, Oxford, UK
| | - Colm Cunningham
- School of Biochemistry & Immunology, Trinity Biomedical Sciences Institute, Trinity College, Dublin, Republic of Ireland; Trinity College Institute of Neuroscience, Trinity College, Dublin, Republic of Ireland
| | - Dimitrios Davalos
- Department of Neurosciences, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, USA; Department of Molecular Medicine, Cleveland Clinic Lerner College of Medicine, Case Western Reserve University, Cleveland, OH, USA
| | - Philip L De Jager
- Center for Translational & Computational Neuroimmunology, Department of Neurology, Columbia University Irving Medical Center, New York, NY, USA; Taub Institute for Research on Alzheimer's Disease and the Aging Brain, Columbia University Irving Medical Center, New York, NY, USA
| | - Bart de Strooper
- UK Dementia Research Institute at University College London, London, UK; Vlaams Instituut voor Biotechnologie at Katholieke Universiteit Leuven, Leuven, Belgium
| | - Adam Denes
- "Momentum" Laboratory of Neuroimmunology, Institute of Experimental Medicine, Budapest, Hungary
| | - Bart J L Eggen
- Department of Biomedical Sciences of Cells & Systems, section Molecular Neurobiology, University of Groningen, Groningen, the Netherlands; University Medical Center Groningen, Groningen, the Netherlands
| | - Ukpong Eyo
- Department of Neuroscience, Center for Brain Immunology and Glia, University of Virginia School of Medicine, Charlottesville, VA, USA
| | - Elena Galea
- Institut de Neurociències and Departament de Bioquímica, Unitat de Bioquímica, Universitat Autònoma de Barcelona, Barcelona, Spain; ICREA, Barcelona, Spain
| | - Sonia Garel
- Institut de Biologie de l'ENS (IBENS), Département de Biologie, École Normale Supérieure, CNRS, INSERM, Paris, France; College de France, Paris, France
| | - Florent Ginhoux
- Singapore Immunology Network (SIgN), Agency for Science, Technology and Research (A(∗)STAR), Singapore, Singapore
| | | | - Ozgun Gokce
- Institute for Stroke and Dementia Research, Ludwig Maximillian's University of Munich, Munich, Germany
| | - Diego Gomez-Nicola
- School of Biological Sciences, University of Southampton, Southampton General Hospital, Southampton, UK
| | - Berta González
- Unidad de Histología Medica, Depto. Biología Celular, Fisiología e Inmunología and Instituto de Neurociencias, Universidad Autónoma de Barcelona, Barcelona, Spain
| | - Siamon Gordon
- Chang Gung University, Taoyuan City, Taiwan (ROC); Sir William Dunn School of Pathology, Oxford, UK
| | - Manuel B Graeber
- Ken Parker Brain Tumour Research Laboratories, Brain and Mind Centre, Faculty of Medicine and Health, The University of Sydney, Camperdown, NSW, Australia
| | - Andrew D Greenhalgh
- Lydia Becker Institute of Immunology and Inflammation, Geoffrey Jefferson Brain Research Centre, Division of Infection, Immunity & Respiratory Medicine, Faculty of Biology, Medicine and Health, The University of Manchester, Manchester, UK
| | - Pierre Gressens
- Université Paris Cité, Inserm, NeuroDiderot, 75019 Paris, France
| | - Melanie Greter
- Institute of Experimental Immunology, University of Zurich, Zurich, Switzerland
| | - David H Gutmann
- Department of Neurology, Washington University School of Medicine, St. Louis, MO, USA
| | - Christian Haass
- Division of Metabolic Biochemistry, Faculty of Medicine, Biomedical Center (BMC), Ludwig-Maximilians-Universität Munchen, Munich, Germany; German Center for Neurodegenerative Diseases (DZNE), Munich, Germany; Munich Cluster for Systems Neurology (SyNergy); Munich, Germany
| | - Michael T Heneka
- Luxembourg Centre for Systems Biomedicine, University of Luxembourg, Belvaux, Luxembourg
| | - Frank L Heppner
- Department of Neuropathology, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Soyon Hong
- UK Dementia Research Institute at University College London, London, UK
| | - David A Hume
- Mater Research Institute-University of Queensland, Brisbane, QLD, Australia
| | - Steffen Jung
- Department of Immunology and Regenerative Biology, Weizmann Institute of Science, Rehovot, Israel
| | - Helmut Kettenmann
- Max-Delbrück Center for Molecular Medicine, Berlin, Germany; Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China
| | - Jonathan Kipnis
- Center for Brain Immunology and Glia (BIG), Department of Pathology and Immunology, Washington University in St. Louis, St. Louis, MO, USA
| | - Ryuta Koyama
- Laboratory of Chemical Pharmacology, Graduate School of Pharmaceutical Sciences, The University of Tokyo, Tokyo, Japan
| | - Greg Lemke
- MNL-L, The Salk Institute for Biological Studies, La Jolla, CA, USA
| | - Marina Lynch
- Trinity College Institute of Neuroscience, Trinity College, Dublin, Republic of Ireland
| | - Ania Majewska
- Department of Neuroscience, University of Rochester, Rochester, NY, USA
| | - Marzia Malcangio
- Wolfson Centre for Age-Related Diseases, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK
| | - Tarja Malm
- University of Eastern Finland, Kuopio, Finland
| | - Renzo Mancuso
- Microglia and Inflammation in Neurological Disorders (MIND) Lab, VIB Center for Molecular Neurology, VIB, Antwerp, Belgium; Department of Biomedical Sciences, University of Antwerp, Antwerp, Belgium
| | - Takahiro Masuda
- Department of Molecular and System Pharmacology, Graduate School of Pharmaceutical Sciences, Kyushu University, Japan
| | - Michela Matteoli
- Humanitas University, Department of Biomedical Sciences, Milan, Italy
| | - Barry W McColl
- UK Dementia Research Institute, Centre for Discovery Brain Sciences, University of Edinburgh, Edinburgh BioQuarter, Edinburgh, UK
| | - Veronique E Miron
- MRC Centre for Reproductive Health, The Queen's Medical Research Institute, Edinburgh BioQuarter, Edinburgh, UK; UK Dementia Research Institute at the University of Edinburgh, Edinburgh BioQuarter, Edinburgh, UK
| | | | - Michelle Monje
- Howard Hughes Medical Institute, (HHMI), MD, USA; Department of Neurology and Neurological Sciences, Stanford University School of Medicine, Stanford University, Stanford, CA, USA
| | | | - Agnes Nadjar
- Neurocentre Magendie, University of Bordeaux, Bordeaux, France; Institut Universitaire de France (IUF), Paris, France
| | - Jonas J Neher
- German Center for Neurodegenerative Diseases (DZNE), Tübingen, Germany; Department of Cellular Neurology, Hertie Institute for Clinical Brain Research, University of Tübingen, Tübingen, Germany
| | - Urte Neniskyte
- VU LSC-EMBL Partnership for Genome Editing Technologies, Life Sciences Center, Vilnius University, Vilnius, Lithuania; Institute of Biosciences, Life Sciences Center, Vilnius University, Vilnius, Lithuania
| | - Harald Neumann
- Institute of Reconstructive Neurobiology, Medical Faculty and University Hospital of Bonn, University of Bonn, Bonn, Germany
| | - Mami Noda
- Laboratory of Pathophysiology, Graduate School of Pharmaceutical Sciences, Kyushu University, Fukuoka, Japan; Institute of Mitochondrial Biology and Medicine of Xi'an Jiaotong University School of Life Science and Technology, Xi'an, China
| | - Bo Peng
- Department of Neurosurgery, Huashan Hospital, Institute for Translational Brain Research, State Key Laboratory of Medical Neurobiology, MOE Frontiers Center for Brain Science, Fudan University, Shanghai, China
| | - Francesca Peri
- Department of Molecular Life Sciences, University of Zurich, Zurich, Switzerland
| | - V Hugh Perry
- UK Dementia Research Institute, University College London, London, UK; School of Biological Sciences, University of Southampton, Southampton, UK
| | - Phillip G Popovich
- Department of Neuroscience, College of Medicine, The Ohio State University, Columbus, OH, USA
| | - Clare Pridans
- University of Edinburgh, Centre for Inflammation Research, Edinburgh, UK
| | - Josef Priller
- Department of Psychiatry & Psychotherapy, School of Medicine, Technical University of Munich, Munich, Germany; Charité - Universitätsmedizin Berlin and DZNE, Berlin, Germany; University of Edinburgh and UK DRI, Edinburgh, UK
| | - Marco Prinz
- Institute of Neuropathology, Faculty of Medicine, University of Freiburg, Freiburg, Germany; Center for Basics in NeuroModulation (NeuroModulBasics), Faculty of Medicine, University of Freiburg, Freiburg, Germany; Signalling Research Centres BIOSS and CIBSS, University of Freiburg, Freiburg, Germany
| | - Davide Ragozzino
- Department of Physiology and Pharmacology, Sapienza University of Rome, Rome, Italy; Santa Lucia Foundation (IRCCS Fondazione Santa Lucia), Rome, Italy
| | | | - Michael W Salter
- Hospital for Sick Children, Toronto, ON, Canada; University of Toronto, Toronto, ON, Canada
| | - Anne Schaefer
- Nash Family Department of Neuroscience, Center for Glial Biology, Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA; Max Planck Institute for Biology of Ageing, Koeln, Germany
| | - Dorothy P Schafer
- Department of Neurobiology, Brudnick Neuropsychiatric Research Institute, University of Massachusetts Medical School, Worcester, MA, USA
| | - Michal Schwartz
- Department of Neurobiology, Weizmann Institute of Science, Rehovot, Israel
| | - Mikael Simons
- Institute of Neuronal Cell Biology, Technical University Munich, German Center for Neurodegenerative Diseases, Munich, Germany
| | - Cody J Smith
- Galvin Life Science Center, University of Notre Dame, Indianapolis, IN, USA
| | - Wolfgang J Streit
- Department of Neuroscience, University of Florida, Gainesville, FL, USA
| | - Tuan Leng Tay
- Faculty of Biology, University of Freiburg, Freiburg, Germany; BrainLinks-BrainTools Centre, University of Freiburg, Freiburg, Germany; Freiburg Institute of Advanced Studies, University of Freiburg, Freiburg, Germany; Department of Biology, Boston University, Boston, MA, USA; Department of Anatomy and Neurobiology, Boston University School of Medicine, Boston, MA, USA
| | - Li-Huei Tsai
- Broad Institute of MIT and Harvard, Cambridge, MA, USA; Picower Institute for Learning and Memory, Massachusetts Institute of Technology, Cambridge, MA, USA; Department of Brain and Cognitive Sciences, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - Alexei Verkhratsky
- Achucarro Basque Center for Neuroscience, Glial Cell Biology Lab, Leioa, Spain; Department of Neuroscience, University of the Basque Country EHU/UPV, Leioa, Spain; Faculty of Biology, Medicine and Health, The University of Manchester, Manchester, UK
| | | | - Hiroaki Wake
- Department of Anatomy and Molecular Cell Biology, Graduate School of Medicine, Nagoya University, Nagoya, Japan
| | - Valérie Wittamer
- Institut de Recherche Interdisciplinaire en Biologie Humaine et Moléculaire (IRIBHM), Université Libre de Bruxelles (ULB), Brussels, Belgium; ULB Neuroscience Institute (UNI), Université Libre de Bruxelles (ULB), Brussels, Belgium
| | - Susanne A Wolf
- Charité Universitätsmedizin, Experimental Ophthalmology and Neuroimmunology, Berlin, Germany
| | - Long-Jun Wu
- Department of Neurology and Department of Immunology, Mayo Clinic, Rochester, MN, USA
| | - Tony Wyss-Coray
- Department of Neurology and Neurological Sciences, Stanford University School of Medicine, Stanford University, Stanford, CA, USA
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Martins B, Novo JP, Fonseca É, Raposo R, Sardão VA, Pereira F, Oriá RB, Fontes-Ribeiro C, Malva J. Necrotic-like BV-2 microglial cell death due to methylmercury exposure. Front Pharmacol 2022; 13:1003663. [PMID: 36408241 PMCID: PMC9667718 DOI: 10.3389/fphar.2022.1003663] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2022] [Accepted: 10/18/2022] [Indexed: 12/01/2022] Open
Abstract
Methylmercury (MeHg) is a dangerous environmental contaminant with strong bioaccumulation in the food chain and neurotoxic properties. In the nervous system, MeHg may cause neurodevelopment impairment and potentially interfere with immune response, compromising proper control of neuroinflammation and aggravating neurodegeneration. Human populations are exposed to environmental contamination with MeHg, especially in areas with strong mining or industrial activity, raising public health concerns. Taking this into consideration, this work aims to clarify pathways leading to acute toxic effects caused by MeHg exposure in microglial cells. BV-2 mouse microglial cells were incubated with MeHg at different concentrations (0.01, 0.1, 1 and 10 µM) for 1 h prior to continuous Lipopolysaccharide (LPS, 0.5 μg/ml) exposure for 6 or 24 h. After cell exposure, reactive oxygen species (ROS), IL-6 and TNF-α cytokines production, inducible nitric oxide synthase (iNOS) expression, nitric oxide (NO) release, metabolic activity, propidium iodide (PI) uptake, caspase-3 and -9 activities and phagocytic activity were assessed. MeHg 10 µM decreased ROS formation, the production and secretion of pro-inflammatory cytokines IL-6, TNF-α, iNOS immunoreactivity, the release of NO in BV-2 cells. Furthermore, MeHg 10 µM decreased the metabolic activity of BV-2 and increased the number of PI-positive cells (necrotic-like cell death) when compared to the respective control group. Besides, MeHg did not interfere with caspase activity or the phagocytic profile of cells. The short-term effects of a high concentration of MeHg on BV-2 microglial cells lead to impaired production of several pro-inflammatory mediators, as well as a higher microglial cell death via necrosis, compromising their neuroinflammatory response. Clarifying the mechanisms underlying MeHg-induced neurotoxicity and neurodegeneration in brain cells is relevant to better understand acute and long-term chronic neuroinflammatory responses following MeHg exposure.
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Affiliation(s)
- B. Martins
- Coimbra Institute for Clinical and Biomedical Research (iCBR), University of Coimbra, Coimbra, Portugal,Institute of Pharmacology and Experimental Therapeutics, Faculty of Medicine, University of Coimbra, Coimbra, Portugal,Center for Innovative Biomedicine and Biotechnology (CIBB), University of Coimbra, Coimbra, Portugal
| | - J. P. Novo
- Coimbra Institute for Clinical and Biomedical Research (iCBR), University of Coimbra, Coimbra, Portugal,Institute of Pharmacology and Experimental Therapeutics, Faculty of Medicine, University of Coimbra, Coimbra, Portugal,Center for Innovative Biomedicine and Biotechnology (CIBB), University of Coimbra, Coimbra, Portugal
| | - É. Fonseca
- Coimbra Institute for Clinical and Biomedical Research (iCBR), University of Coimbra, Coimbra, Portugal,Institute of Pharmacology and Experimental Therapeutics, Faculty of Medicine, University of Coimbra, Coimbra, Portugal,Center for Innovative Biomedicine and Biotechnology (CIBB), University of Coimbra, Coimbra, Portugal
| | - R. Raposo
- Coimbra Institute for Clinical and Biomedical Research (iCBR), University of Coimbra, Coimbra, Portugal,Institute of Pharmacology and Experimental Therapeutics, Faculty of Medicine, University of Coimbra, Coimbra, Portugal,Center for Innovative Biomedicine and Biotechnology (CIBB), University of Coimbra, Coimbra, Portugal,Experimental Biology Core, Health Sciences Center, University of Fortaleza, Fortaleza, Brazil
| | - V. A. Sardão
- Center for Innovative Biomedicine and Biotechnology (CIBB), University of Coimbra, Coimbra, Portugal,Center for Neuroscience and Cell Biology (CNC), UC Biotech, University of Coimbra, Cantanhede, Portugal
| | - F. Pereira
- Coimbra Institute for Clinical and Biomedical Research (iCBR), University of Coimbra, Coimbra, Portugal,Institute of Pharmacology and Experimental Therapeutics, Faculty of Medicine, University of Coimbra, Coimbra, Portugal,Center for Innovative Biomedicine and Biotechnology (CIBB), University of Coimbra, Coimbra, Portugal
| | - R. B. Oriá
- Laboratory of Tissue Healing, Ontogeny, and Nutrition, Department of Morphology and Institute of Biomedicine, School of Medicine, Federal University of Ceará, Fortaleza, Brazil
| | - C. Fontes-Ribeiro
- Coimbra Institute for Clinical and Biomedical Research (iCBR), University of Coimbra, Coimbra, Portugal,Institute of Pharmacology and Experimental Therapeutics, Faculty of Medicine, University of Coimbra, Coimbra, Portugal,Center for Innovative Biomedicine and Biotechnology (CIBB), University of Coimbra, Coimbra, Portugal
| | - J. Malva
- Coimbra Institute for Clinical and Biomedical Research (iCBR), University of Coimbra, Coimbra, Portugal,Institute of Pharmacology and Experimental Therapeutics, Faculty of Medicine, University of Coimbra, Coimbra, Portugal,Center for Innovative Biomedicine and Biotechnology (CIBB), University of Coimbra, Coimbra, Portugal,*Correspondence: J. Malva,
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Wang Y, Hu Z, Liu H, Gu Y, Ye M, Lu Q, Lu X, Huang C. Adolescent microglia stimulation produces long-lasting protection against chronic stress-induced behavioral abnormalities in adult male mice. Brain Behav Immun 2022; 105:44-66. [PMID: 35781008 DOI: 10.1016/j.bbi.2022.06.015] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/14/2022] [Revised: 06/05/2022] [Accepted: 06/28/2022] [Indexed: 11/18/2022] Open
Abstract
Our previous studies had reported that microglia activation one day before stress exposure prevented the behavioral abnormalities induced by chronic stress in adult mice, and a 10-day interval between microglia stimulation and stress exposure can abolish the prophylactic effect of LPS preinjection on the behavioral abnormalities induced by chronic stress, which, however, could be rescued by repeated LPS injection. This suggests that increased stimulation of microglia results in animals developing a strong ability to prevent deleterious stress stimuli. Because microglia in the adolescent brain exhibit flexible immunological plasticity, we hypothesize that a single low-dose LPS injection during adolescence may provide long-lasting protection against behavioral abnormalities induced by chronic stress in adult mice. As expected, our results showed that a single injection of LPS (100 μg/kg) at post-natal day 28 (PND 28) prevented the development of abnormal behaviors and shifted neuroinflammatory responses toward an anti-inflammatory phenotype in adult mice treated with CSDS at their different stages of the age (PND 56, 140, and 252). Moreover, pretreatment with minocycline or PLX3397 to inhibit microglial activation abolished the prophylactic effect of LPS preinjection after PND 28 on behavioral abnormalities and neuroinflammatory responses induced by CSDS in adult mice at their different stages of the age, PND 56, 140, and 252. These results indicate that stimulation of microglia in adolescence may confer long-lasting protection against neuroinflammatory responses and behavioral abnormalities induced by chronic stress in adult mice. This may offer the potential for the development of a "vaccine-like strategy" to prevent mental disorders.
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Affiliation(s)
- Yue Wang
- Department of Pharmacology, School of Pharmacy, Nantong University, #19 Qixiu Road, Nantong 226001, Jiangsu, China
| | - Zhichao Hu
- Department of Pharmacology, School of Pharmacy, Nantong University, #19 Qixiu Road, Nantong 226001, Jiangsu, China
| | - Huijun Liu
- Department of Pharmacy, Yancheng First Hospital, the Fourth Affiliated Hospital of Nantong University, #66 Renmin South Road, Yancheng 224006, Jiangsu, China
| | - Yue Gu
- Department of Pharmacology, School of Pharmacy, Nantong University, #19 Qixiu Road, Nantong 226001, Jiangsu, China
| | - Minxiu Ye
- Department of Pharmacology, School of Pharmacy, Nantong University, #19 Qixiu Road, Nantong 226001, Jiangsu, China
| | - Qun Lu
- Department of Pharmacy, Nantong Third Hospital Affiliated to Nantong University, #60 Middle Qingnian Road, Nantong 226006, Jiangsu, China
| | - Xu Lu
- Department of Pharmacology, School of Pharmacy, Nantong University, #19 Qixiu Road, Nantong 226001, Jiangsu, China
| | - Chao Huang
- Department of Pharmacology, School of Pharmacy, Nantong University, #19 Qixiu Road, Nantong 226001, Jiangsu, China.
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Rowe RK, Green TRF, Giordano KR, Ortiz JB, Murphy SM, Opp MR. Microglia Are Necessary to Regulate Sleep after an Immune Challenge. BIOLOGY 2022; 11:1241. [PMID: 36009868 PMCID: PMC9405260 DOI: 10.3390/biology11081241] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/04/2022] [Revised: 07/29/2022] [Accepted: 08/17/2022] [Indexed: 12/31/2022]
Abstract
Microglia play a critical role in the neuroimmune response, but little is known about the role of microglia in sleep following an inflammatory trigger. Nevertheless, decades of research have been predicated on the assumption that an inflammatory trigger increases sleep through microglial activation. We hypothesized that mice (n = 30) with depleted microglia using PLX5622 (PLX) would sleep less following the administration of lipopolysaccharide (LPS) to induce inflammation. Brains were collected and microglial morphology was assessed using quantitative skeletal analyses and physiological parameters were recorded using non-invasive piezoelectric cages. Mice fed PLX diet had a transient increase in sleep that dissipated by week 2. Subsequently, following a first LPS injection (0.4 mg/kg), mice with depleted microglia slept more than mice on the control diet. All mice were returned to normal rodent chow to repopulate microglia in the PLX group (10 days). Nominal differences in sleep existed during the microglia repopulation period. However, following a second LPS injection, mice with repopulated microglia slept similarly to control mice during the dark period but with longer bouts during the light period. Comparing sleep after the first LPS injection to sleep after the second LPS injection, controls exhibited temporal changes in sleep patterns but no change in cumulative minutes slept, whereas cumulative sleep in mice with repopulated microglia decreased during the dark period across all days. Repopulated microglia had a reactive morphology. We conclude that microglia are necessary to regulate sleep after an immune challenge.
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Affiliation(s)
- Rachel K. Rowe
- Department of Integrative Physiology, University of Colorado, Boulder, CO 80301, USA
- Barrow Neurological Institute at Phoenix Children’s Hospital, Phoenix, AZ 85016, USA
- Department of Child Health, University of Arizona College of Medicine-Phoenix, Phoenix, AZ 85004, USA
| | - Tabitha R. F. Green
- Department of Child Health, University of Arizona College of Medicine-Phoenix, Phoenix, AZ 85004, USA
| | - Katherine R. Giordano
- Department of Child Health, University of Arizona College of Medicine-Phoenix, Phoenix, AZ 85004, USA
- Phoenix Veterans Affairs Health Care System, Phoenix, AZ 85012, USA
| | - J. Bryce Ortiz
- Department of Child Health, University of Arizona College of Medicine-Phoenix, Phoenix, AZ 85004, USA
- Phoenix Veterans Affairs Health Care System, Phoenix, AZ 85012, USA
| | - Sean M. Murphy
- Department of Child Health, University of Arizona College of Medicine-Phoenix, Phoenix, AZ 85004, USA
| | - Mark R. Opp
- Department of Integrative Physiology, University of Colorado, Boulder, CO 80301, USA
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Barczuk J, Siwecka N, Lusa W, Rozpędek-Kamińska W, Kucharska E, Majsterek I. Targeting NLRP3-Mediated Neuroinflammation in Alzheimer’s Disease Treatment. Int J Mol Sci 2022; 23:ijms23168979. [PMID: 36012243 PMCID: PMC9409081 DOI: 10.3390/ijms23168979] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2022] [Revised: 08/10/2022] [Accepted: 08/10/2022] [Indexed: 12/13/2022] Open
Abstract
Alzheimer’s disease (AD) is the most common cause of dementia in the general population and, to date, constitutes a major therapeutic challenge. In the pathogenesis of AD, aggregates of amyloid β (Aβ) and neurofibrillary tangles (NFTs) containing Tau-microtubule-associated protein (tau) are known to trigger a neuroinflammatory response with subsequent formation of an inflammasome. In particular, the NOD-like receptor pyrin domain-containing 3 (NLRP3) inflammasome is thought to play a crucial role in AD-related pathology. While the mechanisms for NLRP3 activation are not fully understood, it has been demonstrated that, after detection of protein aggregates, NLRP3 induces pro-inflammatory cytokines, such as interleukin 18 (IL-18) or interleukin 1β (IL-1β), that further potentiate AD progression. Specific inhibitors of NLRP3 that exhibit various mechanisms to attenuate the activity of NLRP3 have been tested in in vivo studies and have yielded promising results, as shown by the reduced level of tau and Aβ aggregates and diminished cognitive impairment. Herein, we would like to summarize the current state of knowledge on NLRP3 inflammasome priming, activation, and its actual role in AD pathogenesis, and to characterize the NLRP3 inhibitors that have been studied most and their impact on AD-related pathology.
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Affiliation(s)
- Julia Barczuk
- Department of Clinical Chemistry and Biochemistry, Medical University of Lodz, 90-419 Lodz, Poland
| | - Natalia Siwecka
- Department of Clinical Chemistry and Biochemistry, Medical University of Lodz, 90-419 Lodz, Poland
| | - Weronika Lusa
- Department of Clinical Chemistry and Biochemistry, Medical University of Lodz, 90-419 Lodz, Poland
| | | | - Ewa Kucharska
- Department of Gerontology, Geriatrics and Social Work, Jesuit University Ignatianum, 31-501 Krakow, Poland
| | - Ireneusz Majsterek
- Department of Clinical Chemistry and Biochemistry, Medical University of Lodz, 90-419 Lodz, Poland
- Correspondence: ; Tel.: +48-42-272-53-00
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31
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Chen Z, Liu H, Ye Y, Chen D, Lu Q, Lu X, Huang C. Granulocyte-macrophage colony-stimulating factor-triggered innate immune tolerance against chronic stress-induced behavioral abnormalities in mice. Int Immunopharmacol 2022; 109:108924. [PMID: 35704970 DOI: 10.1016/j.intimp.2022.108924] [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: 04/26/2022] [Revised: 05/25/2022] [Accepted: 06/02/2022] [Indexed: 11/05/2022]
Abstract
Pre-stimulation of the innate immune is considered a potential strategy to prevent chronic stress-induced behavioral abnormalities in animals. In this study, we investigated whether granulocyte-macrophage colony-stimulating factor (GM-CSF), an immunostimulant used in the clinic to treat diseases of the hematopoietic system, can prevent chronic stress-induced behavioral abnormalities in mice. Our results showed that a single intraperitoneal injection of GM-CSF (100 μg/kg) one day before stress exposure prevented the depression- and anxiety-like behaviors induced by chronic social defeat stress (CSDS) in mice, including preventing the CSDS-induced increase in the immobility time in the tail suspension test and forced swimming test and decrease in the time spent in the interaction zone in the social interaction test, as well as preventing the CSDS-induced decrease in the time spent (i) in open arms in the elevated plus maze test, (ii) on the illuminated side in the light-dark test, and (iii) in the central region of the open field test. The single GM-CSF preinjection (100 μg/kg) also prevented the CSDS-induced increase in the expression levels of interleukin-6 (IL-6), IL-1β, and tumor necrosis factor-α (TNF-α) mRNA in the hippocampus and medial prefrontal cortex of the mice. Further analysis showed that the preventive effect of GM-CSF on CSDS-induced depression- and anxiety-like behaviors and neuroinflammatory responses was abolished by pretreatment with minocycline (an innate immune inhibitor). These results indicate that a single low dose of GM-CSF before injection could be a potential way to prevent behavioral abnormalities induced by chronic stress in mice.
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Affiliation(s)
- Zhuo Chen
- Invasive Technology Department, Affiliated Hospital 2 of Nantong University, First People's Hospital of Nantong City, No. 6 Haierxiang North Road, Nantong, 226001, China.
| | - Huijun Liu
- Department of Pharmacy, Yancheng First Hopital, the Fourth Affiliated Hospital of Nantong University, #66 Renmin South Road, Yancheng 224008, Jiangsu, China
| | - Ying Ye
- Department of Ultrasound, Affiliated Hospital of Nantong University, #20 Xisi Road, Nantong 226001, Jiangsu, China
| | - Dongjian Chen
- Invasive Technology Department, Affiliated Hospital 2 of Nantong University, First People's Hospital of Nantong City, No. 6 Haierxiang North Road, Nantong, 226001, China
| | - Qun Lu
- Department of Pharmacy, Nantong Third Hospital Affiliated to Nantong University, #60 Middle Qingnian Road, Nantong 226006, Jiangsu, China
| | - Xu Lu
- Department of Pharmacology, School of Pharmacy, Nantong University, #19 Qixiu Road, Nantong 226001, Jiangsu, China
| | - Chao Huang
- Department of Pharmacology, School of Pharmacy, Nantong University, #19 Qixiu Road, Nantong 226001, Jiangsu, China.
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32
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Lajqi T, Frommhold D, Gille C, Hudalla H. Induction of memory-like adaptive responses in murine neutrophils in vitro. Cell Immunol 2022; 376:104535. [DOI: 10.1016/j.cellimm.2022.104535] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2022] [Revised: 04/29/2022] [Accepted: 04/29/2022] [Indexed: 01/02/2023]
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Zhang X, Kracht L, Lerario AM, Dubbelaar ML, Brouwer N, Wesseling EM, Boddeke EWGM, Eggen BJL, Kooistra SM. Epigenetic regulation of innate immune memory in microglia. J Neuroinflammation 2022; 19:111. [PMID: 35568856 PMCID: PMC9107649 DOI: 10.1186/s12974-022-02463-5] [Citation(s) in RCA: 29] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2021] [Accepted: 04/16/2022] [Indexed: 12/13/2022] Open
Abstract
Background Microglia are the tissue-resident macrophages of the CNS. They originate in the yolk sac, colonize the CNS during embryonic development and form a self-sustaining population with limited turnover. A consequence of their relative slow turnover is that microglia can serve as a long-term memory for inflammatory or neurodegenerative events. Methods Using ATAC-, ChIP- and RNA-sequencing, we characterized the epigenomes and transcriptomes of FACS-purified microglia from mice exposed to different stimuli. A repeated endotoxin challenge (LPS) was used to induce tolerance in microglia, while genotoxic stress (DNA repair deficiency-induced accelerated aging through Ercc1 deficiency) resulted in primed (hypersensitive) microglia. Results Whereas the enrichment of permissive epigenetic marks at enhancer regions could explain training (hyper-responsiveness) of primed microglia to an LPS challenge, the tolerized response of microglia seems to be regulated by loss of permissive epigenetic marks. We identify that inflammatory stimuli and accelerated aging as a result of genotoxic stress activate distinct gene networks. These gene networks and associated biological processes are partially overlapping, which is likely driven by specific transcription factor networks, resulting in altered epigenetic signatures and distinct functional (desensitized vs. primed) microglia phenotypes. Conclusion This study provides insight into epigenetic profiles and transcription factor networks associated with transcriptional signatures of tolerized and trained microglia in vivo, leading to a better understanding of innate immune memory of microglia. Supplementary Information The online version contains supplementary material available at 10.1186/s12974-022-02463-5.
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Affiliation(s)
- Xiaoming Zhang
- Department of Biomedical Sciences of Cells and Systems, Section Molecular Neurobiology, University Medical Center Groningen, University of Groningen, Antonius Deusinglaan 1, Hpc-FB43, 9713 AV, Groningen, The Netherlands
| | - Laura Kracht
- Department of Biomedical Sciences of Cells and Systems, Section Molecular Neurobiology, University Medical Center Groningen, University of Groningen, Antonius Deusinglaan 1, Hpc-FB43, 9713 AV, Groningen, The Netherlands
| | - Antonio M Lerario
- Department of Internal Medicine, Division of Metabolism, Endocrinology, and Diabetes, University of Michigan, Ann Arbor, MI, USA
| | - Marissa L Dubbelaar
- Department of Biomedical Sciences of Cells and Systems, Section Molecular Neurobiology, University Medical Center Groningen, University of Groningen, Antonius Deusinglaan 1, Hpc-FB43, 9713 AV, Groningen, The Netherlands
| | - Nieske Brouwer
- Department of Biomedical Sciences of Cells and Systems, Section Molecular Neurobiology, University Medical Center Groningen, University of Groningen, Antonius Deusinglaan 1, Hpc-FB43, 9713 AV, Groningen, The Netherlands
| | - Evelyn M Wesseling
- Department of Biomedical Sciences of Cells and Systems, Section Molecular Neurobiology, University Medical Center Groningen, University of Groningen, Antonius Deusinglaan 1, Hpc-FB43, 9713 AV, Groningen, The Netherlands
| | - Erik W G M Boddeke
- Department of Biomedical Sciences of Cells and Systems, Section Molecular Neurobiology, University Medical Center Groningen, University of Groningen, Antonius Deusinglaan 1, Hpc-FB43, 9713 AV, Groningen, The Netherlands.,Center for Healthy Aging, Department of Cellular and Molecular Medicine, University of Copenhagen, Blegdamsvej 3B, 2200, Copenhagen, Denmark
| | - Bart J L Eggen
- Department of Biomedical Sciences of Cells and Systems, Section Molecular Neurobiology, University Medical Center Groningen, University of Groningen, Antonius Deusinglaan 1, Hpc-FB43, 9713 AV, Groningen, The Netherlands.
| | - Susanne M Kooistra
- Department of Biomedical Sciences of Cells and Systems, Section Molecular Neurobiology, University Medical Center Groningen, University of Groningen, Antonius Deusinglaan 1, Hpc-FB43, 9713 AV, Groningen, The Netherlands.
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Zhang Q, Kong WL, Yuan JJ, Chen Q, Gong CX, Liu L, Wang FX, Huang JC, Yang GQ, Zhou K, Xu R, Xiong XY, Yang QW. Redistribution of Histone Marks on Inflammatory Genes Associated With Intracerebral Hemorrhage-Induced Acute Brain Injury in Aging Rats. Front Neurosci 2022; 16:639656. [PMID: 35495024 PMCID: PMC9051396 DOI: 10.3389/fnins.2022.639656] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2020] [Accepted: 03/21/2022] [Indexed: 11/13/2022] Open
Abstract
The contribution of histone mark redistribution to the age-induced decline of endogenous neuroprotection remains unclear. In this study, we used an intracerebral hemorrhage (ICH)-induced acute brain injury rat model to study the transcriptional and chromatin responses in 13- and 22-month-old rats. Transcriptome analysis (RNA-seq) revealed that the expression of neuroinflammation-associated genes was systematically upregulated in ICH rat brains, irrespective of age. Further, we found that interferon-γ (IFN-γ) response genes were activated in both 13- and 22-month-old rats. Anti-IFN-γ treatment markedly reduced ICH-induced acute brain injury in 22-month-old rats. At the chromatin level, ICH induced the redistribution of histone modifications in the promoter regions, especially H3K4me3 and H3K27me3, in neuroinflammation-associated genes in 13- and 22-month-old rats, respectively. Moreover, ICH-induced histone mark redistribution and gene expression were found to be correlated. Collectively, these findings demonstrate that histone modifications related to gene expression are extensively regulated in 13- and 22-month-old rats and that anti-IFN-γ is effective for ICH treatment, highlighting the potential of developing therapies targeting histone modifications to cure age-related diseases, including brain injury and neuroinflammation.
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Affiliation(s)
- Qin Zhang
- Department of Neurology, Xinqiao Hospital, The Army Medical University (Third Military Medical University), Chongqing, China
| | - Wei-lin Kong
- Department of Neurology, Xinqiao Hospital, The Army Medical University (Third Military Medical University), Chongqing, China
| | - Jun-Jie Yuan
- Department of Neurology, Xinqiao Hospital, The Army Medical University (Third Military Medical University), Chongqing, China
| | - Qiong Chen
- Department of Neurology, Xinqiao Hospital, The Army Medical University (Third Military Medical University), Chongqing, China
| | - Chang-Xiong Gong
- Department of Neurology, Xinqiao Hospital, The Army Medical University (Third Military Medical University), Chongqing, China
| | - Liang Liu
- Department of Neurology, Xinqiao Hospital, The Army Medical University (Third Military Medical University), Chongqing, China
| | - Fa-Xiang Wang
- Department of Neurology, Xinqiao Hospital, The Army Medical University (Third Military Medical University), Chongqing, China
| | - Jia-Cheng Huang
- Department of Neurology, Xinqiao Hospital, The Army Medical University (Third Military Medical University), Chongqing, China
| | - Guo-Qiang Yang
- Department of Neurology, Xinqiao Hospital, The Army Medical University (Third Military Medical University), Chongqing, China
| | - Kai Zhou
- Department of Neurology, Xinqiao Hospital, The Army Medical University (Third Military Medical University), Chongqing, China
| | - Rui Xu
- Department of Neurology, Xinqiao Hospital, The Army Medical University (Third Military Medical University), Chongqing, China
| | - Xiao-Yi Xiong
- Department of Neurology, Xinqiao Hospital, The Army Medical University (Third Military Medical University), Chongqing, China
- Acupuncture and Tuina School, Third Teaching Hospital, Chengdu University of Traditional Chinese Medicine, Chengdu, China
- Acupuncture and Chronobiology Key Laboratory of Sichuan, Chengdu, China
- Xiao-Yi Xiong ;
| | - Qing-Wu Yang
- Department of Neurology, Xinqiao Hospital, The Army Medical University (Third Military Medical University), Chongqing, China
- *Correspondence: Qing-Wu Yang
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Camacho-Morales A. Glycolytic metabolism supports microglia training during age-related neurodegeneration. Pharmacol Rep 2022; 74:818-831. [DOI: 10.1007/s43440-022-00363-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2022] [Revised: 03/17/2022] [Accepted: 03/18/2022] [Indexed: 11/29/2022]
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Nemeth DP, Liu X, McKim DB, DiSabato DJ, Oliver B, Herd A, Katta A, Negray CE, Floyd J, McGovern S, Pruden PS, Zhutang F, Smirnova M, Godbout JP, Sheridan J, Quan N. Dynamic Interleukin-1 Receptor Type 1 Signaling Mediates Microglia-Vasculature Interactions Following Repeated Systemic LPS. J Inflamm Res 2022; 15:1575-1590. [PMID: 35282272 PMCID: PMC8906862 DOI: 10.2147/jir.s350114] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Accepted: 02/16/2022] [Indexed: 01/18/2023] Open
Abstract
Introduction Lipopolysaccharide (LPS) preconditioning involves repeated, systemic, and sub-threshold doses of LPS, which induces a neuroprotective state within the CNS, thus preventing neuronal death and functional losses. Recently, proinflammatory cytokine, Interleukin-1 (IL-1), and its primary signaling partner, interleukin-1 receptor type 1 (IL-1R1), have been associated with neuroprotection in the CNS. However, it is still unknown how IL-1/IL-1R1 signaling impacts the processes associated with neuroprotection. Methods Using our IL-1R1 restore genetic mouse model, mouse lines were generated to restrict IL-1R1 expression either to endothelia (Tie2-Cre-Il1r1r/r) or microglia (Cx3Cr1-Cre-Il1r1 r/r), in addition to either global ablation (Il1r1 r/r) or global restoration of IL-1R1 (Il1r1 GR/GR). The LPS preconditioning paradigm consisted of four daily i.p. injections of LPS at 1 mg/kg (4d LPS). 24 hrs following the final i.p. LPS injection, tissue was collected for qPCR analysis, immunohistochemistry, or FAC sorting. Results Following 4d LPS, we found multiple phenotypes that are dependent on IL-1R1 signaling such as microglia morphology alterations, increased microglial M2-like gene expression, and clustering of microglia onto the brain vasculature. We determined that 4d LPS induces microglial morphological changes, clustering at the vasculature, and gene expression changes are dependent on endothelial IL-1R1, but not microglial IL-1R1. A novel observation was the induction of microglial IL-1R1 (mIL-1R1) following 4d LPS. The induced mIL-1R1 permits a unique response to central IL-1β: the mIL-1R1 dependent induction of IL-1R1 antagonist (IL-1RA) and IL-1β gene expression. Analysis of RNA sequencing datasets revealed that mIL-1R1 is also induced in neurodegenerative diseases. Discussion Here, we have identified cell type-specific IL-1R1 mediated mechanisms, which may contribute to the neuroprotection observed in LPS preconditioning. These findings identify key cellular and molecular contributors in LPS-induced neuroprotection.
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Affiliation(s)
- Daniel P Nemeth
- College of Dentistry, The Ohio State University, Columbus, OH, USA,Institute for Behavioral Medicine Research, The Ohio State University, Columbus, OH, USA,Stiles-Nicholson Brain Institute, Florida Atlantic University, Jupiter, FL, USA,Correspondence: Daniel P Nemeth; Ning Quan, 5353 Parkside Drive, Jupiter, FL, 33458, USA, Email ;
| | - Xiaoyu Liu
- Stiles-Nicholson Brain Institute, Florida Atlantic University, Jupiter, FL, USA
| | - Daniel B McKim
- Department of Animal Sciences, University of Illinois Urbana-Champaign, Champaign, IL, USA
| | - Damon J DiSabato
- Institute for Behavioral Medicine Research, The Ohio State University, Columbus, OH, USA,Department of Neuroscience, The Ohio State University, Columbus, OH, USA
| | - Braedan Oliver
- Institute for Behavioral Medicine Research, The Ohio State University, Columbus, OH, USA
| | - Anu Herd
- Stiles-Nicholson Brain Institute, Florida Atlantic University, Jupiter, FL, USA
| | - Asish Katta
- College of Dentistry, The Ohio State University, Columbus, OH, USA
| | - Christina E Negray
- College of Dentistry, The Ohio State University, Columbus, OH, USA,Institute for Behavioral Medicine Research, The Ohio State University, Columbus, OH, USA
| | - James Floyd
- Stiles-Nicholson Brain Institute, Florida Atlantic University, Jupiter, FL, USA
| | - Samantha McGovern
- Stiles-Nicholson Brain Institute, Florida Atlantic University, Jupiter, FL, USA
| | - Paige S Pruden
- Institute for Behavioral Medicine Research, The Ohio State University, Columbus, OH, USA
| | - Feiyang Zhutang
- Institute for Behavioral Medicine Research, The Ohio State University, Columbus, OH, USA
| | - Maria Smirnova
- Stiles-Nicholson Brain Institute, Florida Atlantic University, Jupiter, FL, USA
| | - Jonathan P Godbout
- Institute for Behavioral Medicine Research, The Ohio State University, Columbus, OH, USA,Department of Neuroscience, The Ohio State University, Columbus, OH, USA
| | - John Sheridan
- College of Dentistry, The Ohio State University, Columbus, OH, USA,Institute for Behavioral Medicine Research, The Ohio State University, Columbus, OH, USA
| | - Ning Quan
- Stiles-Nicholson Brain Institute, Florida Atlantic University, Jupiter, FL, USA
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Kuo HC, Lee KF, Chen SL, Chiu SC, Lee LY, Chen WP, Chen CC, Chu CH. Neuron–Microglia Contacts Govern the PGE2 Tolerance through TLR4-Mediated de Novo Protein Synthesis. Biomedicines 2022; 10:biomedicines10020419. [PMID: 35203628 PMCID: PMC8962342 DOI: 10.3390/biomedicines10020419] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2021] [Revised: 02/02/2022] [Accepted: 02/07/2022] [Indexed: 02/05/2023] Open
Abstract
Cellular and molecular mechanisms of the peripheral immune system (e.g., macrophage and monocyte) in programming endotoxin tolerance (ET) have been well studied. However, regulatory mechanism in development of brain immune tolerance remains unclear. The inducible COX-2/PGE2 axis in microglia, the primary innate immune cells of the brain, is a pivotal feature in causing inflammation and neuronal injury, both in acute excitotoxic insults and chronic neurodegenerative diseases. This present study investigated the regulatory mechanism of PGE2 tolerance in microglia. Multiple reconstituted primary brain cells cultures, including neuron–glial (NG), mixed glial (MG), neuron-enriched, and microglia-enriched cultures, were performed and consequently applied to a treatment regimen for ET induction. Our results revealed that the levels of COX-2 mRNA and supernatant PGE2 in NG cultures, but not in microglia-enriched and MG cultures, were drastically reduced in response to the ET challenge, suggesting that the presence of neurons, rather than astroglia, is required for PGE2 tolerance in microglia. Furthermore, our data showed that neural contact, instead of its soluble factors, is sufficient for developing microglial PGE2 tolerance. Simultaneously, this finding determined how neurons regulated microglial PGE2 tolerance. Moreover, by inhibiting TLR4 activation and de novo protein synthesis by LPS-binding protein (LBP) manipulation and cycloheximide, our data showed that the TLR4 signal and de novo protein synthesis are necessary for microglia to develop PGE2 tolerance in NG cells under the ET challenge. Altogether, our findings demonstrated that neuron–microglia contacts are indispensable in emerging PGE2 tolerance through the regulation of TLR4-mediated de novo protein synthesis.
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Affiliation(s)
- Hsing-Chun Kuo
- Division of Basic Medical Sciences, Department of Nursing, Chang Gung University of Science and Technology, Chiayi 61363, Taiwan;
- Chang Gung Memorial Hospital, Chiayi 61363, Taiwan
- Research Center for Food and Cosmetic Safety, College of Human Ecology, Chang Gung University of Science and Technology, Taoyuan 33303, Taiwan
- Chronic Diseases and Health Promotion Research Center, Chang Gung University of Science and Technology, Chiayi 61363, Taiwan
| | - Kam-Fai Lee
- Department of Pathology, Chang Gung Memorial Hospital, Chiayi 61363, Taiwan;
| | - Shiou-Lan Chen
- Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical University (KMU), Kaohsiung 80708, Taiwan;
| | - Shu-Chen Chiu
- National Laboratory Animal Center (NLAC), NARLabs, Tainan 74147, Taiwan;
| | - Li-Ya Lee
- Grape King Biotechnology Inc (Grape King Bio Ltd.), Zhong-Li, Taoyuan 32542, Taiwan; (L.-Y.L.); (W.-P.C.); (C.-C.C.)
| | - Wan-Ping Chen
- Grape King Biotechnology Inc (Grape King Bio Ltd.), Zhong-Li, Taoyuan 32542, Taiwan; (L.-Y.L.); (W.-P.C.); (C.-C.C.)
| | - Chin-Chu Chen
- Grape King Biotechnology Inc (Grape King Bio Ltd.), Zhong-Li, Taoyuan 32542, Taiwan; (L.-Y.L.); (W.-P.C.); (C.-C.C.)
| | - Chun-Hsien Chu
- Institute of Molecular Medicine, College of Medicine, National Cheng Kung University, Tainan 70456, Taiwan
- Correspondence: or ; Tel.: +886-6-235-3535 (ext. 3592); Fax: +886-6-209-5845
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Rani A, Barter J, Kumar A, Stortz JA, Hollen M, Nacionales D, Moldawer LL, Efron PA, Foster TC. Influence of age and sex on microRNA response and recovery in the hippocampus following sepsis. Aging (Albany NY) 2022; 14:728-746. [PMID: 35094981 PMCID: PMC8833110 DOI: 10.18632/aging.203868] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2021] [Accepted: 01/20/2022] [Indexed: 11/25/2022]
Abstract
Sepsis, defined as a dysregulated host immune response to infection, is a common and dangerous clinical syndrome. The excessive host inflammatory response can induce immediate and persistent cognitive decline, which can be worse in older individuals. Sex-specific differences in the outcome of infectious diseases and sepsis appear to favor females. We employed a murine model to examine the influence of age and sex on the brain's microRNA (miR) response following sepsis. Young and old mice of both sexes underwent cecal ligation and puncture (CLP) with daily restraint stress. Expression of hippocampal miR was examined in age- and sex-matched controls at 1 and 4 days post-CLP. Few miR were modified in a similar manner across age or sex and these few miR were generally associated with neuroprotection against inflammation. Similar to previous work examining transcription, young females exhibited a better recovery of the miR profile from day 1 to day 4, relative to young males and old females. For young males and all female groups, the initial response mainly involved a decrease in miR expression. In contrast, old males exhibited only upregulated miR on day 1 and day 4 and many of the miR upregulated on day 1 and day 4 were linked to neurodegeneration, increased neuroinflammation, and cognitive impairment. The results emphasize age and sex differences in epigenetic mechanisms that likely contribute to susceptibility or resilience to cognitive impairment due to sepsis.
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Affiliation(s)
- Asha Rani
- Department of Neuroscience, McKnight Brain Institute, University of Florida, Gainesville, FL 32611, USA
| | - Jolie Barter
- Department of Neuroscience, McKnight Brain Institute, University of Florida, Gainesville, FL 32611, USA
| | - Ashok Kumar
- Department of Neuroscience, McKnight Brain Institute, University of Florida, Gainesville, FL 32611, USA
| | - Julie A Stortz
- Department of Surgery, University of Florida, Gainesville, FL 32611, USA
| | - McKenzie Hollen
- Department of Surgery, University of Florida, Gainesville, FL 32611, USA
| | - Dina Nacionales
- Department of Surgery, University of Florida, Gainesville, FL 32611, USA
| | - Lyle L Moldawer
- Department of Surgery, University of Florida, Gainesville, FL 32611, USA
| | - Philip A Efron
- Department of Surgery, University of Florida, Gainesville, FL 32611, USA
| | - Thomas C Foster
- Department of Neuroscience, McKnight Brain Institute, University of Florida, Gainesville, FL 32611, USA.,Genetics and Genomics Program, University of Florida, Gainesville, FL 32611, USA
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Innate immune stimulation prevents the development of anxiety-like behaviors in chronically stressed mice. Neuropharmacology 2022; 207:108950. [PMID: 35074304 DOI: 10.1016/j.neuropharm.2022.108950] [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: 06/07/2021] [Revised: 12/30/2021] [Accepted: 01/12/2022] [Indexed: 12/19/2022]
Abstract
Anxiety is a common psychological disease which can induce severe social burdens. Searching methods that prevent the onset of anxiety is of great significance for ameliorating the social and individual problems induced by this type of disease. In this study, we investigated how innate immune pre-stimulation influences the anxiety-like behaviors in chronically stressed mice. Our results showed that a single injection of an innate immune stimulant lipopolysaccharide (LPS) at the dose of 50, 100, and 500 μg/kg 1 day before stress exposure prevented chronic social defeat stress (CSDS)-induced anxiety-like behaviors in mice. A single injection of LPS (100 μg/kg) 5 days before stress exposure produced similar preventive effects on CSDS-induced anxiety-like behaviors, while similar effects were not observed at the condition of 10-days interval between LPS injection and stress exposure. A second LPS injection 10 days after the first LPS injection or a 4 × LPS injection 10 days before stress exposure also prevented CSDS-induced anxiety-like behaviors. Moreover, a single injection of LPS (100 μg/kg) 1 day before stress exposure prevented the production of pro-inflammatory cytokines in the hippocampus and prefrontal cortex of CSDS mice. Suppression of innate immune stimulation by minocycline pretreatment simultaneously abrogated the preventive effect of LPS pre-injection (100 μg/kg) on CSDS-induced anxiety-like behaviors and pro-inflammatory cytokine production in the brain. Our results demonstrated that the pre-stimulation of the innate immune system can prevent the development of anxiety-like behaviors and the progression of the neuroinflammatory responses in the brain in chronically stressed mice.
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Li F, Lu X, Ma Y, Gu Y, Ye T, Huang C. Monophosphoryl Lipid A Tolerance Against Chronic Stress-Induced Depression-Like Behaviors in Mice. Int J Neuropsychopharmacol 2022; 25:399-411. [PMID: 35015863 PMCID: PMC9154281 DOI: 10.1093/ijnp/pyab097] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/30/2021] [Revised: 11/29/2021] [Accepted: 01/06/2022] [Indexed: 11/27/2022] Open
Abstract
BACKGROUNDS Our recent studies reported that a single injection with lipopolysaccharide (LPS) before stress exposure prevents depression-like behaviors in stressed mice. Monophosphoryl lipid A (MPL) is a derivative of LPS that lacks the undesirable properties of LPS. We hypothesize that MPL can exert a prophylactic effect on depression. METHODS The experimental mice were pre-injected with MPL before stress exposure. Depression in mice was induced through chronic social defeat stress (CSDS). Behavioral tests were conducted to identify depression-like behaviors. Real-time polymerase chain reaction and biochemical assays were performed to examine the gene and protein expression levels of pro-inflammatory cytokines. RESULTS A single MPL injection 1 day before stress exposure at the dosages of 400, 800, and 1600 μg/kg but not 200 μg/kg prevented CSDS-induced depression-like behaviors in mice. This effect of MPL, however, vanished with the extension of the interval time between drug injection and stress exposure from 1 day or 5 days to 10 days, which was rescued by a second MPL injection 10 days after the first MPL injection or by a 4× MPL injection 10 days before stress exposure. A single MPL injection (800 μg/kg) before stress exposure prevented CSDS-induced increases in the gene expression levels of pro-inflammatory cytokines in the hippocampus and prefrontal cortex. Pre-inhibiting the innate immune stimulation by minocycline pretreatment (40 mg/kg) abrogated the preventive effect of MPL on CSDS-induced depression-like behaviors and neuroinflammatory responses in animal brains. CONCLUSIONS MPL, through innate immune stimulation, prevents stress-induced depression-like behaviors in mice by preventing neuroinflammatory responses.
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Affiliation(s)
| | | | | | | | - Ting Ye
- Department of Pharmacology, School of Pharmacy, Nantong University, Nantong, Jiangsu, China
| | - Chao Huang
- Correspondence: Chao Huang, Department of Pharmacology, School of Pharmacy, Nantong University, #19 Qixiu Road, Nantong 226001, Jiangsu Province, China ()
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Li F, Xiang H, Gu Y, Ye T, Lu X, Huang C. Innate immune stimulation by monophosphoryl lipid A prevents chronic social defeat stress-induced anxiety-like behaviors in mice. J Neuroinflammation 2022; 19:12. [PMID: 34996472 PMCID: PMC8742352 DOI: 10.1186/s12974-021-02377-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2021] [Accepted: 12/29/2021] [Indexed: 02/06/2023] Open
Abstract
Background Innate immune pre-stimulation can prevent the development of depression-like behaviors in chronically stressed mice; however, whether the same stimulation prevents the development of anxiety-like behaviors in animals remains unclear. We addressed this issue using monophosphoryl lipid A (MPL), a derivative of lipopolysaccharide (LPS) that lacks undesirable properties of LPS but still keeps immune-enhancing activities. Methods The experimental mice were pre-injected intraperitoneally with MPL before stress exposure. Depression was induced through chronic social defeat stress (CSDS). Behavioral tests were conducted to identify anxiety-like behaviors. Real-time polymerase chain reaction (PCR) and biochemical assays were employed to examine the gene and protein expression levels of pro-inflammatory markers. Results A single MPL injection at the dose of 400 and 800 μg/kg 1 day before stress exposure prevented CSDS-induced anxiety-like behaviors, and a single MPL injection (400 μg/kg) five but not 10 days before stress exposure produced similar effect. The preventive effect of MPL on anxiety-like behaviors was also observed in CSDS mice who received a second MPL injection 10 days after the first MPL injection or a 4 × MPL injection 10 days before stress exposure. MPL pre-injection also prevented the production of pro-inflammatory cytokines in the hippocampus and medial prefrontal cortex in CSDS mice, and inhibiting the central immune response by minocycline pretreatment abrogated the preventive effect of MPL on CSDS-induced anxiety-like behaviors and pro-inflammatory cytokine productions in the brain. Conclusions Pre-stimulation of the innate immune system by MPL can prevent chronic stress-induced anxiety-like behaviors and neuroinflammatory responses in the brain in mice.
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Affiliation(s)
- Fu Li
- Department of Pharmacy, Changzhou Geriatric Hospital Affiliated to Soochow University, Changzhou No.7 People's Hospital, 288# Yanling East Road, Changzhou, 213000, Jiangsu, China
| | - Haitao Xiang
- Department of Neurosurgery, Suzhou Kowloon Hospital, Shanghai Jiaotong University School of Medicine, #118 Wansheng Street, Suzhou, 215028, Jiangsu, China
| | - Yue Gu
- Department of Pharmacology, School of Pharmacy, Nantong University, #19 Qixiu Road, Jiangsu, 226001, Nantong, China
| | - Ting Ye
- Department of Pharmacology, School of Pharmacy, Nantong University, #19 Qixiu Road, Jiangsu, 226001, Nantong, China
| | - Xu Lu
- Department of Pharmacology, School of Pharmacy, Nantong University, #19 Qixiu Road, Jiangsu, 226001, Nantong, China.
| | - Chao Huang
- Department of Pharmacology, School of Pharmacy, Nantong University, #19 Qixiu Road, Jiangsu, 226001, Nantong, China.
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Abstract
The gut microbiome influences many host physiologies, spanning gastrointestinal function, metabolism, immune homeostasis, neuroactivity, and behavior. Many microbial effects on the host are orchestrated by bidirectional interactions between the microbiome and immune system. Imbalances in this dialogue can lead to immune dysfunction and immune-mediated conditions in distal organs including the brain. Dysbiosis of the gut microbiome and dysregulated neuroimmune responses are common comorbidities of neurodevelopmental, neuropsychiatric, and neurological disorders, highlighting the importance of the gut microbiome–neuroimmune axis as a regulator of central nervous system homeostasis. In this review, we discuss recent evidence supporting a role for the gut microbiome in regulating the neuroimmune landscape in health and disease. Expected final online publication date for the Annual Review of Immunology, Volume 40 is April 2022. Please see http://www.annualreviews.org/page/journal/pubdates for revised estimates.
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Affiliation(s)
- Lewis W. Yu
- Department of Integrative Biology and Physiology, University of California, Los Angeles, California 90095, USA;, ,
| | - Gulistan Agirman
- Department of Integrative Biology and Physiology, University of California, Los Angeles, California 90095, USA;, ,
| | - Elaine Y. Hsiao
- Department of Integrative Biology and Physiology, University of California, Los Angeles, California 90095, USA;, ,
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Choi BY, Han M, Kwak JW, Kim TH. Genetics and Epigenetics in Allergic Rhinitis. Genes (Basel) 2021; 12:2004. [PMID: 34946955 PMCID: PMC8700872 DOI: 10.3390/genes12122004] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2021] [Revised: 12/13/2021] [Accepted: 12/13/2021] [Indexed: 12/12/2022] Open
Abstract
The pathogenesis of allergic rhinitis is associated with genetic, environmental, and epigenetic factors. Genotyping of single nucleotide polymorphisms (SNPs) is an advanced technique in the field of molecular genetics that is closely correlated with genome-wide association studies (GWASs) in large population groups with allergic diseases. Many recent studies have paid attention to the role of epigenetics, including alteration of DNA methylation, histone acetylation, and miRNA levels in the pathogenesis of allergic rhinitis. In this review article, genetics and epigenetics of allergic rhinitis, including information regarding functions and significance of previously known and newly-discovered genes, are summarized. Directions for future genetic and epigenetic studies of allergic rhinitis are also proposed.
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Affiliation(s)
| | | | | | - Tae Hoon Kim
- Department of Otorhinolaryngology-Head & Neck Surgery, College of Medicine, Korea University, Seoul 02841, Korea; (B.Y.C.); (M.H.); (J.W.K.)
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Carloni E, Ramos A, Hayes LN. Developmental Stressors Induce Innate Immune Memory in Microglia and Contribute to Disease Risk. Int J Mol Sci 2021; 22:13035. [PMID: 34884841 PMCID: PMC8657756 DOI: 10.3390/ijms222313035] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2021] [Revised: 11/23/2021] [Accepted: 11/25/2021] [Indexed: 12/26/2022] Open
Abstract
Many types of stressors have an impact on brain development, function, and disease susceptibility including immune stressors, psychosocial stressors, and exposure to drugs of abuse. We propose that these diverse developmental stressors may utilize a common mechanism that underlies impaired cognitive function and neurodevelopmental disorders such as schizophrenia, autism, and mood disorders that can develop in later life as a result of developmental stressors. While these stressors are directed at critical developmental windows, their impacts are long-lasting. Immune activation is a shared pathophysiology across several different developmental stressors and may thus be a targetable treatment to mitigate the later behavioral deficits. In this review, we explore different types of prenatal and perinatal stressors and their contribution to disease risk and underlying molecular mechanisms. We highlight the impact of developmental stressors on microglia biology because of their early infiltration into the brain, their critical role in brain development and function, and their long-lived status in the brain throughout life. Furthermore, we introduce innate immune memory as a potential underlying mechanism for developmental stressors' impact on disease. Finally, we highlight the molecular and epigenetic reprogramming that is known to underlie innate immune memory and explain how similar molecular mechanisms may be at work for cells to retain a long-term perturbation after exposure to developmental stressors.
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Affiliation(s)
- Elisa Carloni
- Department of Molecular and Cellular Biology, Dartmouth College, Hanover, NH 03755, USA;
| | - Adriana Ramos
- Department of Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02115, USA;
| | - Lindsay N. Hayes
- Solomon H. Snyder Department of Neuroscience, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
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Lu Q, Xiang H, Zhu H, Chen Y, Lu X, Huang C. Intranasal lipopolysaccharide administration prevents chronic stress-induced depression- and anxiety-like behaviors in mice. Neuropharmacology 2021; 200:108816. [PMID: 34599975 DOI: 10.1016/j.neuropharm.2021.108816] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2021] [Revised: 08/24/2021] [Accepted: 09/26/2021] [Indexed: 02/06/2023]
Abstract
We recently reported that intraperitoneal injection of a low dose of lipopolysaccharide (LPS) prevents chronic stress-induced depression-like behaviors in mice. In this study, we reported that a single intranasal LPS administration (10 μg/mouse) one day prior to stress exposure produced prophylactic effects on chronic social defeat stress (CSDS)-induced depression-like behaviors, which was indicated by the reduction in social interaction time in the social interaction test and the decrease in immobility time in the tail suspension test and forced swimming test. The single intranasal LPS administration prior to stress exposure was also found to prevent CSDS-induced anxiety-like behaviors, including prevention of CSDS-induced decrease in the time spent in open arms in the elevated plus maze test, decrease in the time spent in lit side in the light-dark test, and decrease in the time spent in central regions in the open field test, along with no changes in locomotor activity. Further analysis showed that the single intranasal LPS administration one day prior to stress exposure prevented CSDS-induced increase in levels of tumor necrosis factor-α (TNF-α), interleukin-6 (IL-6), and IL-1β mRNA in the hippocampus and prefrontal cortex. Inhibition of innate immune stimulation by minocycline pretreatment not only abrogated the preventive effect of intranasal LPS administration on CSDS-induced depression- and anxiety-like behaviors, but also abrogated the preventive effect of intranasal LPS administration on CSDS-induced neuroinflammatory responses in the hippocampus and prefrontal cortex. These results demonstrate that intranasal administration of innate immune stimulants could be a potential approach for the prevention of depression and anxiety.
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Affiliation(s)
- Qun Lu
- Department of Pharmacy, Nantong Third Hospital Affiliated to Nantong University, #60 Middle Qingnian Road, Nantong, 226006, Jiangsu, China
| | - Haitao Xiang
- Department of Neurosurgery, Suzhou Kowloon Hospital, Shanghai Jiaotong University School of Medicine, #118 Wansheng Street, Suzhou, 215028, Jiangsu, China
| | - Haojie Zhu
- Department of Pharmacology, School of Pharmacy, Nantong University, #19 Qixiu Road, Nantong, 226001, Jiangsu, China
| | - Yifan Chen
- Department of Medical Imaging, School of Medicine, Nantong University, #19 Qixiu Road, Nantong, 226001, Jiangsu, China
| | - Xu Lu
- Department of Pharmacology, School of Pharmacy, Nantong University, #19 Qixiu Road, Nantong, 226001, Jiangsu, China.
| | - Chao Huang
- Department of Pharmacology, School of Pharmacy, Nantong University, #19 Qixiu Road, Nantong, 226001, Jiangsu, China.
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Hayley S, Sun H. Neuroimmune multi-hit perspective of coronaviral infection. J Neuroinflammation 2021; 18:231. [PMID: 34645457 PMCID: PMC8512650 DOI: 10.1186/s12974-021-02282-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2021] [Accepted: 09/26/2021] [Indexed: 12/27/2022] Open
Abstract
It is well accepted that environmental stressors experienced over a one’s life, from microbial infections to chemical toxicants to even psychological stressors, ultimately shape central nervous system (CNS) functioning but can also contribute to its eventual breakdown. The severity, timing and type of such environmental “hits”, woven together with genetic factors, likely determine what CNS outcomes become apparent. This focused review assesses the current COVID-19 pandemic through the lens of a multi-hit framework and disuses how the SARS-COV-2 virus (causative agent) might impact the brain and potentially interact with other environmental insults. What the long-term consequences of SAR2 COV-2 upon neuronal processes is yet unclear, but emerging evidence is suggesting the possibility of microglial or other inflammatory factors as potentially contributing to neurodegenerative illnesses. Finally, it is critical to consider the impact of the virus in the context of the substantial psychosocial stress that has been associated with the global pandemic. Indeed, the loneliness, fear to the future and loss of social support alone has exerted a massive impact upon individuals, especially the vulnerable very young and the elderly. The substantial upswing in depression, anxiety and eating disorders is evidence of this and in the years to come, this might be matched by a similar spike in dementia, as well as motor and cognitive neurodegenerative diseases.
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Affiliation(s)
- Shawn Hayley
- Department of Neuroscience, Carleton University, 1125 Colonel By Drive, Ottawa, ON, K1S 5B6, Canada.
| | - Hongyu Sun
- Department of Neuroscience, Carleton University, 1125 Colonel By Drive, Ottawa, ON, K1S 5B6, Canada
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Couch ACM, Berger T, Hanger B, Matuleviciute R, Srivastava DP, Thuret S, Vernon AC. Maternal immune activation primes deficiencies in adult hippocampal neurogenesis. Brain Behav Immun 2021; 97:410-422. [PMID: 34352366 PMCID: PMC8478664 DOI: 10.1016/j.bbi.2021.07.021] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/03/2021] [Revised: 06/25/2021] [Accepted: 07/28/2021] [Indexed: 12/19/2022] Open
Abstract
Neurogenesis, the process in which new neurons are generated, occurs throughout life in the mammalian hippocampus. Decreased adult hippocampal neurogenesis (AHN) is a common feature across psychiatric disorders, including schizophrenia, depression- and anxiety-related behaviours, and is highly regulated by environmental influences. Epidemiological studies have consistently implicated maternal immune activation (MIA) during neurodevelopment as a risk factor for psychiatric disorders in adulthood. The extent to which the reduction of hippocampal neurogenesis in adulthood may be driven by early life exposures, such as MIA, is however unclear. We therefore reviewed the literature for evidence of the involvement of MIA in disrupting AHN. Consistent with our hypothesis, data from both in vivo murine and in vitro human models of AHN provide evidence for key roles of specific cytokines induced by MIA in the foetal brain in disrupting hippocampal neural progenitor cell proliferation and differentiation early in development. The precise molecular mechanisms however remain unclear. Nonetheless, these data suggest a potential latent vulnerability mechanism, whereby MIA primes dysfunction in the unique hippocampal pool of neural stem/progenitor cells. This renders offspring potentially more susceptible to additional environmental exposures later in life, such as chronic stress, resulting in the unmasking of psychopathology. We highlight the need for studies to test this hypothesis using validated animal models of MIA, but also to test the relevance of such data for human pathology at a molecular basis through the use of patient-derived induced pluripotent stem cells (hiPSC) differentiated into hippocampal progenitor cells.
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Affiliation(s)
- Amalie C M Couch
- Department of Basic and Clinical Neuroscience, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK; MRC Centre for Neurodevelopmental Disorders, King's College London, London, UK
| | - Thomas Berger
- Department of Basic and Clinical Neuroscience, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK
| | - Bjørn Hanger
- Department of Basic and Clinical Neuroscience, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK; MRC Centre for Neurodevelopmental Disorders, King's College London, London, UK
| | | | - Deepak P Srivastava
- Department of Basic and Clinical Neuroscience, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK; MRC Centre for Neurodevelopmental Disorders, King's College London, London, UK
| | - Sandrine Thuret
- Department of Basic and Clinical Neuroscience, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK
| | - Anthony C Vernon
- Department of Basic and Clinical Neuroscience, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK; MRC Centre for Neurodevelopmental Disorders, King's College London, London, UK.
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Mizobuchi H, Soma GI. Low-dose lipopolysaccharide as an immune regulator for homeostasis maintenance in the central nervous system through transformation to neuroprotective microglia. Neural Regen Res 2021; 16:1928-1934. [PMID: 33642362 PMCID: PMC8343302 DOI: 10.4103/1673-5374.308067] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2020] [Revised: 10/26/2020] [Accepted: 12/16/2020] [Indexed: 12/25/2022] Open
Abstract
Microglia, which are tissue-resident macrophages in the brain, play a central role in the brain innate immunity and contribute to the maintenance of brain homeostasis. Lipopolysaccharide is a component of the outer membrane of gram-negative bacteria, and activates immune cells including microglia via Toll-like receptor 4 signaling. Lipopolysaccharide is generally known as an endotoxin, as administration of high-dose lipopolysaccharide induces potent systemic inflammation. Also, it has long been recognized that lipopolysaccharide exacerbates neuroinflammation. In contrast, our study revealed that oral administration of lipopolysaccharide ameliorates Alzheimer's disease pathology and suggested that neuroprotective microglia are involved in this phenomenon. Additionally, other recent studies have accumulated evidence demonstrating that controlled immune training with low-dose lipopolysaccharide prevents neuronal damage by transforming the microglia into a neuroprotective phenotype. Therefore, lipopolysaccharide may not a mere inflammatory inducer, but an immunomodulator that can lead to neuroprotective effects in the brain. In this review, we summarized current studies regarding neuroprotective microglia transformed by immune training with lipopolysaccharide. We state that microglia transformed by lipopolysaccharide preconditioning cannot simply be characterized by their general suppression of proinflammatory mediators and general promotion of anti-inflammatory mediators, but instead must be described by their complex profile comprising various molecules related to inflammatory regulation, phagocytosis, neuroprotection, anti-apoptosis, and antioxidation. In addition, microglial transformation seems to depend on the dose of lipopolysaccharide used during immune training. Immune training of neuroprotective microglia using low-dose lipopolysaccharide, especially through oral lipopolysaccharide administration, may represent an innovative prevention or treatment for neurological diseases; however more vigorous studies are still required to properly modulate these treatments.
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Affiliation(s)
- Haruka Mizobuchi
- Control of Innate Immunity, Technology Research Association, Kagawa, Japan
| | - Gen-Ichiro Soma
- Control of Innate Immunity, Technology Research Association, Kagawa, Japan
- Macrophi Inc., Kagawa, Japan
- Research Institute for Healthy Living, Niigata University of Pharmacy and Applied Life Sciences, Niigata, Japan
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Adulthood systemic inflammation accelerates the trajectory of age-related cognitive decline. Aging (Albany NY) 2021; 13:22092-22108. [PMID: 34587117 PMCID: PMC8507275 DOI: 10.18632/aging.203588] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2021] [Accepted: 09/20/2021] [Indexed: 11/25/2022]
Abstract
In order to understand the long-term effects of systemic inflammation, it is important to distinguish inflammation-induced changes in baseline cognitive function from changes that interact with aging to influence the trajectory of cognitive decline. Lipopolysaccharide (LPS; 1 mg/kg) or vehicle was administered to young adult (6 months) male rats via intraperitoneal injections, once a week for 7 weeks. Longitudinal effects on cognitive decline were examined 6 and 12 months after the initial injections. Repeated LPS treatment, in adults, resulted in a long-term impairment in memory, examined in aged animals (age 18 months), but not in middle-age (age 12 months). At 12 months following injections, LPS treatment was associated with a decrease in N-methyl-D-aspartate receptor-mediated component of synaptic transmission and altered expression of genes linked to the synapse and to regulation of the response to inflammatory signals. The results of the current study suggest that the history of systemic inflammation is one component of environmental factors that contribute to the resilience or susceptibility to age-related brain changes and associated trajectory of cognitive decline.
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Lajqi T, Braun M, Kranig SA, Frommhold D, Pöschl J, Hudalla H. LPS Induces Opposing Memory-like Inflammatory Responses in Mouse Bone Marrow Neutrophils. Int J Mol Sci 2021; 22:ijms22189803. [PMID: 34575963 PMCID: PMC8469609 DOI: 10.3390/ijms22189803] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2021] [Revised: 08/23/2021] [Accepted: 09/07/2021] [Indexed: 01/03/2023] Open
Abstract
A growing body of evidence suggests that innate immune cells can respond in a memory-like (adaptive) fashion, which is referred to as trained immunity. Only few in vivo studies have shown training effects in neutrophils; however, no in vitro setup has been established to study the induction of trained immunity or tolerance in neutrophils by microbial agents. In light of their short lifespan (up to 48 h), we suggest to use the term trained sensitivity for neutrophils in an in vitro setting. Here, we firstly describe a feasible two-hit model, using different doses of lipopolysaccharide (LPS) in bone marrow neutrophils. We found that low doses (10 pg/mL) induce pro-inflammatory activation (trained sensitivity), whereas priming with high doses (100 ng/mL) leads to suppression of pro-inflammatory mediators such as TNF-α or IL-6 (tolerance) (p < 0.05). On a functional level, trained neutrophils displayed increased phagocytic activity and LFA-1 expression as well as migrational capacity and CD11a expression, whereas tolerant neutrophils show contrasting effects in vitro. Mechanistically, TLR4/MyD88/PI3Ks regulate the activation of p65, which controls memory-like responses in mouse bone marrow neutrophils (p < 0.05). Our results open a new window for further in vitro studies on memory-like inflammatory responses of short-lived innate immune cells such as neutrophils.
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Affiliation(s)
- Trim Lajqi
- Department of Neonatology, Heidelberg University Children’s Hospital, D-69120 Heidelberg, Germany; (T.L.); (M.B.); (S.A.K.); (D.F.); (J.P.)
| | - Maylis Braun
- Department of Neonatology, Heidelberg University Children’s Hospital, D-69120 Heidelberg, Germany; (T.L.); (M.B.); (S.A.K.); (D.F.); (J.P.)
| | - Simon Alexander Kranig
- Department of Neonatology, Heidelberg University Children’s Hospital, D-69120 Heidelberg, Germany; (T.L.); (M.B.); (S.A.K.); (D.F.); (J.P.)
| | - David Frommhold
- Department of Neonatology, Heidelberg University Children’s Hospital, D-69120 Heidelberg, Germany; (T.L.); (M.B.); (S.A.K.); (D.F.); (J.P.)
- Klinik für Kinderheilkunde und Jugendmedizin, D-87700 Memmingen, Germany
| | - Johannes Pöschl
- Department of Neonatology, Heidelberg University Children’s Hospital, D-69120 Heidelberg, Germany; (T.L.); (M.B.); (S.A.K.); (D.F.); (J.P.)
| | - Hannes Hudalla
- Department of Neonatology, Heidelberg University Children’s Hospital, D-69120 Heidelberg, Germany; (T.L.); (M.B.); (S.A.K.); (D.F.); (J.P.)
- Correspondence: ; Tel.: +49-6221-56-1983; Fax: +49-6221-56-5626
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