51
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Eor JY, Tan PL, Son YJ, Lee CS, Kim SH. Milk products fermented by
Lactobacillus
strains modulate the gut–bone axis in an ovariectomised murine model. INT J DAIRY TECHNOL 2020. [DOI: 10.1111/1471-0307.12708] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Ju Young Eor
- College of Life Sciences and Biotechnology Korea University Seoul 02841 South Korea
- Institute of Life Science and Natural Resources Korea University Seoul136‐713South Korea
| | - Pei Lei Tan
- College of Life Sciences and Biotechnology Korea University Seoul 02841 South Korea
| | - Yoon Ji Son
- College of Life Sciences and Biotechnology Korea University Seoul 02841 South Korea
- Institute of Life Science and Natural Resources Korea University Seoul136‐713South Korea
| | - Chul Sang Lee
- College of Life Sciences and Biotechnology Korea University Seoul 02841 South Korea
| | - Sae Hun Kim
- College of Life Sciences and Biotechnology Korea University Seoul 02841 South Korea
- Institute of Life Science and Natural Resources Korea University Seoul136‐713South Korea
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Chan RF, Turecki G, Shabalin AA, Guintivano J, Zhao M, Xie LY, van Grootheest G, Kaminsky ZA, Dean B, Penninx BW, Aberg KA, van den Oord EJ. Cell Type-Specific Methylome-wide Association Studies Implicate Neurotrophin and Innate Immune Signaling in Major Depressive Disorder. Biol Psychiatry 2020; 87:431-442. [PMID: 31889537 PMCID: PMC9933050 DOI: 10.1016/j.biopsych.2019.10.014] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/24/2019] [Revised: 09/26/2019] [Accepted: 10/10/2019] [Indexed: 01/06/2023]
Abstract
BACKGROUND We sought to characterize methylation changes in brain and blood associated with major depressive disorder (MDD). As analyses of bulk tissue may obscure association signals and hamper the biological interpretation of findings, these changes were studied on a cell type-specific level. METHODS In 3 collections of human postmortem brain (n = 206) and 1 collection of blood samples (N = 1132) of MDD cases and controls, we used epigenomic deconvolution to perform cell type-specific methylome-wide association studies within subpopulations of neurons/glia for the brain data and granulocytes/T cells/B cells/monocytes for the blood data. Sorted neurons/glia from a fourth postmortem brain collection (n = 58) were used for validation purposes. RESULTS Cell type-specific methylome-wide association studies identified multiple findings in neurons/glia that were detected across brain collections and were reproducible in physically sorted nuclei. Cell type-specific analyses in blood samples identified methylome-wide significant associations in T cells, monocytes, and whole blood that replicated findings from a past methylation study of MDD. Pathway analyses implicated p75 neurotrophin receptor/nerve growth factor signaling and innate immune toll-like receptor signaling in MDD. Top results in neurons, glia, bulk brain, T cells, monocytes, and whole blood were enriched for genes supported by genome-wide association studies for MDD and other psychiatric disorders. CONCLUSIONS We both replicated and identified novel MDD-methylation associations in human brain and blood samples at a cell type-specific level. Our results provide mechanistic insights into how the immune system may interact with the brain to affect MDD susceptibility. Importantly, our findings involved associations with MDD in human samples that implicated many closely related biological pathways. These disease-linked sites and pathways represent promising new therapeutic targets for MDD.
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53
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Zhang K, Lin W, Zhang J, Zhao Y, Wang X, Zhao M. Effect of Toll-like receptor 4 on depressive-like behaviors induced by chronic social defeat stress. Brain Behav 2020; 10:e01525. [PMID: 31945269 PMCID: PMC7066327 DOI: 10.1002/brb3.1525] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/11/2019] [Revised: 10/14/2019] [Accepted: 11/10/2019] [Indexed: 12/20/2022] Open
Abstract
INTRODUCTION A growing body of evidence suggests that stress is an important factor in depression, and pro-inflammatory cytokines contribute to the occurrence and development of depression in both animal models and human patients. Toll-like receptor 4 (TLR4) has been shown to be a key innate immune pattern recognition receptor involved in the regulation of stress responses and inflammation. However, the exact effects of TLR4 on depressive-like behaviors induced by chronic social defeat stress (CSDS) are not known. METHODS In this study, the effects of TLR4 on depressive-like behaviors were investigated in an animal model of depression induced by CSDS. The depressive-like behaviors were assessed by forced swimming test (FST), social interaction test (SIT), and light-dark box test (LDT). The protein expressions of TLR4 and tumor necrosis factor-α (TNF-α) in the hippocampus were measured using Western blotting. RESULTS We found that CSDS increased TLR4 protein levels in the hippocampus and induced behavioral despair in FST, social avoidance in SIT, and anxiety-like behavior in LDT. Fluoxetine normalized the increased expression of TLR4 and reversed behavioral despair, social avoidance, as well as anxiety-like behavior induced by CSDS. However, directly blocking TLR4, by using either TLR4 inhibitor TAK-242 or knockout of TLR4, only inhibited behavioral despair, but not social avoidance or anxiety-like behavior induced by CSDS. CONCLUSIONS These results demonstrate a specific modulating role of TLR4 in behavioral despair induced by CSDS and suggest that TAK-242 may be a beneficial treatment for patients with behavioral despair.
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Affiliation(s)
- Ke Zhang
- CAS Key Laboratory of Mental Health, Institute of Psychology, Chinese Academy of Sciences, Beijing, China.,Department of Psychology, University of Chinese Academy of Sciences, Beijing, China
| | - Wenjuan Lin
- CAS Key Laboratory of Mental Health, Institute of Psychology, Chinese Academy of Sciences, Beijing, China
| | - Juntao Zhang
- CAS Key Laboratory of Mental Health, Institute of Psychology, Chinese Academy of Sciences, Beijing, China.,Department of Psychology, University of Chinese Academy of Sciences, Beijing, China
| | - Yawei Zhao
- CAS Key Laboratory of Mental Health, Institute of Psychology, Chinese Academy of Sciences, Beijing, China.,Department of Psychology, University of Chinese Academy of Sciences, Beijing, China
| | - Xiaqing Wang
- CAS Key Laboratory of Mental Health, Institute of Psychology, Chinese Academy of Sciences, Beijing, China.,Department of Psychology, University of Chinese Academy of Sciences, Beijing, China
| | - Mei Zhao
- CAS Key Laboratory of Mental Health, Institute of Psychology, Chinese Academy of Sciences, Beijing, China.,Department of Psychology, University of Chinese Academy of Sciences, Beijing, China
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54
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Alshammari TK, Alghamdi H, Alkhader LF, Alqahtani Q, Alrasheed NM, Yacoub H, Alnaem N, AlNakiyah M, Alshammari MA. Analysis of the molecular and behavioral effects of acute social isolation on rats. Behav Brain Res 2020; 377:112191. [DOI: 10.1016/j.bbr.2019.112191] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2019] [Revised: 08/23/2019] [Accepted: 08/28/2019] [Indexed: 01/07/2023]
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Wang Z, Ni X, Zhang L, Sun L, Zhu X, Zhou Q, Yang Z, Yuan H. Toll-Like Receptor 4 and Inflammatory Micro-Environment of Pancreatic Islets in Type-2 Diabetes Mellitus: A Therapeutic Perspective. Diabetes Metab Syndr Obes 2020; 13:4261-4272. [PMID: 33204132 PMCID: PMC7666984 DOI: 10.2147/dmso.s279104] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/27/2020] [Accepted: 10/20/2020] [Indexed: 12/13/2022] Open
Abstract
Patients with type-2 diabetes mellitus (T2DM) display chronic low-grade inflammation induced by activation of the innate immune system. Toll-like receptor (TLR)4 is a pattern recognition receptor that plays a vital part in activation of the innate immune system. Results from animal and computer-simulation studies have demonstrated that targeting TLR4 to block the TLR4-nuclear factor-kappa B (NF-κB) pathway reduces the inflammatory response and complications associated with T2DM. Therefore, TLR4-targeted therapy has broad prospects. Here, we reviewed the role of TLR4 in inflammation during chronic hyperglycemia in T2DM and its therapeutic prospects.
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Affiliation(s)
- Zhaoping Wang
- The MOH Key Laboratory of Geriatrics, Beijing Hospital, National Center of Gerontology, Beijing, People’s Republic of China
| | - Xiaolin Ni
- The MOH Key Laboratory of Geriatrics, Beijing Hospital, National Center of Gerontology, Beijing, People’s Republic of China
- Graduate School of Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, People’s Republic of China
| | - Li Zhang
- The MOH Key Laboratory of Geriatrics, Beijing Hospital, National Center of Gerontology, Beijing, People’s Republic of China
| | - Liang Sun
- The MOH Key Laboratory of Geriatrics, Beijing Hospital, National Center of Gerontology, Beijing, People’s Republic of China
| | - Xiaoquan Zhu
- The MOH Key Laboratory of Geriatrics, Beijing Hospital, National Center of Gerontology, Beijing, People’s Republic of China
| | - Qi Zhou
- The MOH Key Laboratory of Geriatrics, Beijing Hospital, National Center of Gerontology, Beijing, People’s Republic of China
| | - Ze Yang
- The MOH Key Laboratory of Geriatrics, Beijing Hospital, National Center of Gerontology, Beijing, People’s Republic of China
| | - Huiping Yuan
- The MOH Key Laboratory of Geriatrics, Beijing Hospital, National Center of Gerontology, Beijing, People’s Republic of China
- Correspondence: Huiping Yuan The MOH Key Laboratory of Geriatrics, Beijing Hospital, National Center of Gerontology, Dongdan DaHua Road 1#, Beijing100730, People’s Republic of ChinaTel +86-10-58115043Fax +86-10-65237929 Email
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Alvarez-Mon MA, Gomez-Lahoz AM, Orozco A, Lahera G, Sosa-Reina MD, Diaz D, Albillos A, Quintero J, Molero P, Monserrat J, Alvarez-Mon M. Blunted Expansion of Regulatory T Lymphocytes Is Associated With Increased Bacterial Translocation in Patients With Major Depressive Disorder. Front Psychiatry 2020; 11:591962. [PMID: 33488424 PMCID: PMC7820111 DOI: 10.3389/fpsyt.2020.591962] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/17/2020] [Accepted: 12/04/2020] [Indexed: 12/20/2022] Open
Abstract
Background: Major Depressive Disorder (MDD) is associated with both proinflammatory and adaptive immune response abnormalities. Regulatory T lymphocytes (Tregs), a subtype of CD4+ T cells, are relevant for maintaining immune-inflammatory system homeostasis and control of inflammation such as the kind potentially induced by the interactions between the intestinal microbiome and gut mucosa. We investigated the Treg population and its distribution along their stages of differentiation/activation, as well as its function in MDD patients without concomitant diseases. We also studied the potential association between Treg alterations, intestinal barrier damage, and bacterial translocation. Methods: 30 MDD patients and 20 healthy controls were studied. The levels of circulating CD25FoxP3+ Tregs and their distribution on the naïve (TN), effector (TE), central (TCM), and effector memory(TEM) differentiation/activation stages were analyzed using polychromatic flow cytometry. Chemokine receptors (CCR) 2, 5, and 6, and the intracytoplasmic IL-10 expression by the Tregs were also analyzed. The serum IL-10 was measured using Luminex. The serum levels of zonulin and the intestinal fatty acid-binding protein (I-FABP), both markers of gut barrier function, and the LPS-binding protein (LBP), a marker of bacterial translocation, were measured using an enzyme-linked immunosorbent assay. Results: MDD patients had increased number of circulating Tregs cells with enhanced number of Tregs at the TN, TE, TCM, and TEM stages. The percentage of Tregs cells at TN stage was significantly higher in MDD patients. The percentage of Tregs that expressed CCR2 and CCR6 was increased as well as those expressing IL-10. MDD patients had significantly increased levels of circulating I-FABP and LBP. MDD patients with high LBP levels had a significant reduction in the number of circulating Tregs compared to normal-LBP MDD patients. Conclusions: MDD patients showed an expansion of circulating Tregs and their CD25highFoxP3+ and CD25lowFoxP3+ subsets throughout the different stages of CD4+ T lymphocyte differentiation/activation. Tregs also showed an increased frequency of cells expressing CCR6 and CCR2. IL-10 Treg production was also enhanced in MDD patients that concurrently had increased serum IL-10 levels. However, this Treg expansion was blunted in MDD patients with gut barrier damage and increased bacterial translocation.
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Affiliation(s)
- Miguel Angel Alvarez-Mon
- Department of Psychiatry and Medical Psychology, University Clinic of Navarra, Pamplona, Spain.,Department of Medicine and Medical Specialities, University of Alcala, Alcala de Henares, Spain.,Department of Psychiatry and Mental Health, Hospital Universitario Infanta Leonor, Madrid, Spain
| | - Ana Maria Gomez-Lahoz
- Department of Medicine and Medical Specialities, University of Alcala, Alcala de Henares, Spain
| | - Arantxa Orozco
- Department of Psychiatry, University Hospital "Principe de Asturias", Alcalá de Henares, Spain
| | - Guillermo Lahera
- Department of Medicine and Medical Specialities, University of Alcala, Alcala de Henares, Spain.,Department of Psychiatry, University Hospital "Principe de Asturias", Alcalá de Henares, Spain.,CIBERSAM (Biomedical Research Networking Centre in Mental Health), Madrid, Spain
| | - M Dolores Sosa-Reina
- Department of Medicine and Medical Specialities, University of Alcala, Alcala de Henares, Spain
| | - David Diaz
- Department of Medicine and Medical Specialities, University of Alcala, Alcala de Henares, Spain
| | - Agustin Albillos
- Department of Medicine and Medical Specialities, University of Alcala, Alcala de Henares, Spain.,Department of Gastroenterology, University Hospital Ramon y Cajal, Madrid, Spain.,Institute Ramon y Cajal for Health Research (IRYCIS), Madrid, Spain.,Biomedical Institute for Liver and Gut Diseases (CIBEREHD), Madrid, Spain
| | - Javier Quintero
- Department of Psychiatry and Mental Health, Hospital Universitario Infanta Leonor, Madrid, Spain.,Department of Legal and Psychiatry, Complutense University, Madrid, Spain
| | - Patricio Molero
- Department of Psychiatry and Medical Psychology, University Clinic of Navarra, Pamplona, Spain
| | - Jorge Monserrat
- Department of Medicine and Medical Specialities, University of Alcala, Alcala de Henares, Spain
| | - Melchor Alvarez-Mon
- Department of Medicine and Medical Specialities, University of Alcala, Alcala de Henares, Spain.,Institute Ramon y Cajal for Health Research (IRYCIS), Madrid, Spain.,Biomedical Institute for Liver and Gut Diseases (CIBEREHD), Madrid, Spain.,Service of Internal Medicine and Rheumatology, Autoimmune Diseases University Hospital "Principe de Asturias", Madrid, Spain
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Alvarez-Mon MA, Gómez AM, Orozco A, Lahera G, Sosa MD, Diaz D, Auba E, Albillos A, Monserrat J, Alvarez-Mon M. Abnormal Distribution and Function of Circulating Monocytes and Enhanced Bacterial Translocation in Major Depressive Disorder. Front Psychiatry 2019; 10:812. [PMID: 31803077 PMCID: PMC6873610 DOI: 10.3389/fpsyt.2019.00812] [Citation(s) in RCA: 50] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/13/2019] [Accepted: 10/14/2019] [Indexed: 12/16/2022] Open
Abstract
Introduction: Major depressive disorder (MDD) patients experience a systemic inflammatory stage. Monocytes play an important role in innate inflammatory responses and may be modulated by bacterial translocation. Our aim was to investigate the subset distribution and function of circulating monocytes, levels of proinflammatory cytokines, gut barrier damage, and bacterial translocation in MDD patients. Methods: Twenty-two MDD patients without concomitant diseases and 14 sex- and age-matched healthy controls were studied. The levels of circulating CD14++CD16- (classical), CD14++CD16++ (intermediate) and CD14-CD16++ (nonclassical) monocytes and the intracytoplasmic tumor necrosis factor (TNF)-α, interleukin (IL)-1β, IL-6, and IL-10 expression in the presence or absence of lipopolysaccharide (LPS) stimulation were analyzed by polychromatic flow cytometry. The serum TNF-α, IL-1β, IL-6, and IL-10 levels were measured by Luminex. LPS-binding protein (LBP), intestinal fatty acid-binding protein (I-FABP), and zonulin were measured by enzyme-linked immunosorbent assay (ELISA). Results: MDD patients had a significant increase in the frequency of intermediate monocytes and a significant decrease in the frequency of classical monocytes compared to those in the healthy controls. MDD patients had a significantly increased percentage of classical monocytes that expressed IL-1β, intermediate monocytes that expressed IL-1β and IL6 and nonclassical monocytes that expressed IL-1β, and decreased levels of nonclassical monocytes that expressed IL6 compared to those in the healthy controls. MDD patients had significantly increased levels of circulating TNF-α, IL-1β, LBP, and I-FABP compared to those in the healthy controls. MDD patients with high LBP levels had a significant reduction in the number of circulating monocytes compared to that in the normal-LBP MDD patients, which can be mainly ascribed to a decrease in the number of intermediate and nonclassical monocytes. Conclusions: We have demonstrated that compared to the healthy controls, MDD patients show a marked alteration in circulating monocytes, with an expansion of the intermediate subset with increased frequency of IL-1β and IL-6 producing cells. These patients also exhibited a systemic proinflammatory state, which was characterized by the enhanced serum TNF-α and IL-1β levels compared to those in the healthy controls. Furthermore, MDD patients showed increased LBP and I-FABP levels compared to those in healthy controls, indicating increased bacterial translocation and gut barrier damage.
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Affiliation(s)
- Miguel Angel Alvarez-Mon
- Department of Psychiatry and Medical Psychology, Clinica Universidad de Navarra, Pamplona, Spain
| | - Ana Maria Gómez
- Department of Medicine and Medical Specialties, University of Alcalá, Madrid, Spain
- Institute Ramón y Cajal for Health Research (IRYCIS), Madrid, Spain
| | - Arancha Orozco
- Division of Psychiatry, University Hospital “Principe de Asturias”, Alcalá de Henares, Spain
| | - Guillermo Lahera
- Department of Medicine and Medical Specialties, University of Alcalá, Madrid, Spain
- Institute Ramón y Cajal for Health Research (IRYCIS), Madrid, Spain
- Biomedical Research Centre for Mental Health Network (CIBERSAM), Madrid, Spain
| | - Maria Dolores Sosa
- Department of Medicine and Medical Specialties, University of Alcalá, Madrid, Spain
- Institute Ramón y Cajal for Health Research (IRYCIS), Madrid, Spain
| | - David Diaz
- Department of Medicine and Medical Specialties, University of Alcalá, Madrid, Spain
- Institute Ramón y Cajal for Health Research (IRYCIS), Madrid, Spain
- Biomedical Institute for Liver and Gut Diseases (CIBEREHD), Instituto de Salud Carlos III, Madrid, Spain
| | - Enrique Auba
- Department of Psychiatry and Medical Psychology, Clinica Universidad de Navarra, Pamplona, Spain
| | - Agustín Albillos
- Department of Medicine and Medical Specialties, University of Alcalá, Madrid, Spain
- Institute Ramón y Cajal for Health Research (IRYCIS), Madrid, Spain
- Biomedical Institute for Liver and Gut Diseases (CIBEREHD), Instituto de Salud Carlos III, Madrid, Spain
- Service of Gastroenterology, University Hospital Ramón 80 y Cajal, Madrid, Spain
| | - Jorge Monserrat
- Department of Medicine and Medical Specialties, University of Alcalá, Madrid, Spain
- Institute Ramón y Cajal for Health Research (IRYCIS), Madrid, Spain
- Biomedical Institute for Liver and Gut Diseases (CIBEREHD), Instituto de Salud Carlos III, Madrid, Spain
| | - Melchor Alvarez-Mon
- Department of Medicine and Medical Specialties, University of Alcalá, Madrid, Spain
- Institute Ramón y Cajal for Health Research (IRYCIS), Madrid, Spain
- Biomedical Institute for Liver and Gut Diseases (CIBEREHD), Instituto de Salud Carlos III, Madrid, Spain
- Immune System Diseases and Oncology, Internal Medicine Service, University Hospital “Príncipe de Asturias”, Alcalá de Henares, Spain
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The selenium-containing compound 3-((4-chlorophenyl)selanyl)-1-methyl-1H-indole reverses depressive-like behavior induced by acute restraint stress in mice: modulation of oxido-nitrosative stress and inflammatory pathway. Psychopharmacology (Berl) 2019; 236:2867-2880. [PMID: 30610349 DOI: 10.1007/s00213-018-5151-x] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/21/2018] [Accepted: 12/11/2018] [Indexed: 01/17/2023]
Abstract
RATIONALE AND OBJECTIVES Stress-induced alterations in oxidative and inflammatory parameters have been implicated in the pathophysiology of mood disorders. Based on the antioxidant and anti-inflammatory properties of the selenium-containing compound 3-((4-chlorophenyl)selanyl)-1-methyl-1H-indole (CMI), we assessed its ability to reverse depression-like behavioral alterations, neuroinflammation, and oxidative imbalance induced by acute restraint stress. METHODS Mice submitted to restraint for 240 min received CMI (1 or 10 mg/kg, orally) 10 min after the end of the stress induction. Behavioral and biochemical tests were carried out after further 30 min. RESULTS Restraint-induced depression-like behavior in the tail suspension test (TST), splash test, and new object exploration test was reversed by CMI. None of the treatments evoked locomotor alteration. In addition, CMI abrogated restraint-induced increases in plasma levels of corticosterone and in markers of oxidative stress and impaired superoxide dismutase and catalase activity in the prefrontal cortex (PFC) and hippocampus (HC). CMI also blocked stress-induced downregulation of mRNA levels of glucocorticoid receptor and brain-derived neurotrophic factor and upregulation of nuclear factor kappa B, inducible nitric oxide synthase, tumor necrosis alpha, indoelamine-2,3-dioxygenase, and glycogen synthase kinase 3 beta in PFC and HC. CONCLUSIONS These preclinical results indicate that administration of selenium-containing compounds might help to treat depression associated with inflammation and oxidative stress. Graphical abstract ᅟ.
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Guo T, Hou D, Yu D. Bioinformatics analysis of gene expression profile data to screen key genes involved in intracranial aneurysms. Mol Med Rep 2019; 20:4415-4424. [PMID: 31545495 PMCID: PMC6797989 DOI: 10.3892/mmr.2019.10696] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2018] [Accepted: 04/17/2019] [Indexed: 01/10/2023] Open
Abstract
Intracranial aneurysm (IA) is a cerebrovascular disease with a high mortality rate. The pathogenesis of IA remains unclear and the treatment limited. The purpose of the present study was to identify the key genes expressed in IAs and provide the basis for further research and treatment. The raw dataset GSE75436 was downloaded from Gene Expression Omnibus, including 15 IA samples and 15 matched superficial temporal artery (STA) samples. Then, differentially expressed genes (DEGs) were identified using the limma package in R software. Hierarchical clustering analysis was performed on the DEGs using the gplot2 package in R. Database for Annotation, Visualization, and Integrated Discovery (DAVID) online tools were used to perform gene ontology (GO) functional enrichment analysis. DAVID and gene set enrichment analysis were separately used to perform the Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway enrichment analyses. The intersections of the two results were selected as common KEGG pathways. Protein-protein interaction (PPI) analysis among the DEGs involved in the common KEGG pathways was performed using Search Tool for the Retrieval of Interacting Genes online tools, and visualized with Cytoscape software. A total of 782 DEGs were identified, comprising 392 upregulated and 390 downregulated DEGs. Hierarchical clustering demonstrated that the DEGs could precisely distinguish the IAs from the STAs. The GO enrichment analysis demonstrated that the upregulated DEGs were mainly involved in the inflammatory response and the management of extracellular matrix, and the downregulated DEGs were mainly involved in the process of vascular smooth muscle contraction. The KEGG pathway enrichment analysis demonstrated that the common pathways were ‘leishmaniasis’, ‘Toll-like receptor signaling pathway’ and ‘vascular smooth muscle contraction’. In the PPI network, tumor necrosis factor (TNF), interleukin 8 and Toll-like receptor 4 had the highest degrees; they were associated with the inflammatory response. The Toll-like receptor signaling pathway and TNF gene may serve as targets for future research and treatment.
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Affiliation(s)
- Tie Guo
- Department of Neurology, Haikou Hospital Affiliated to Xiangya School of Medicine, Central South University, Haikou, Hainan 570208, P.R. China
| | - Dan Hou
- Department of Neurology, Haikou Hospital Affiliated to Xiangya School of Medicine, Central South University, Haikou, Hainan 570208, P.R. China
| | - Dan Yu
- Department of Neurology, Haikou Hospital Affiliated to Xiangya School of Medicine, Central South University, Haikou, Hainan 570208, P.R. China
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Behavioral effects of toll-like receptor-4 antagonist 'eritoran' in an experimental model of depression: role of prefrontal and hippocampal neurogenesis and γ-aminobutyric acid/glutamate balance. Behav Pharmacol 2019; 29:413-425. [PMID: 29561292 DOI: 10.1097/fbp.0000000000000390] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Depression is the disease of the modern era. The lack of response to the available antidepressants, which were developed on the basis of the monoaminergic deficit hypothesis of depression, has encouraged scientists to think about new mechanisms explaining the pathogenesis of depression. In this context, the inflammatory theory has emerged to clarify many aspects of depression that the previous theories have failed to explain. Toll-like receptor-4 (TLR-4) has a regulatory role in the brain's immune response to stress, and its activation is suggested to play a pivotal role in the pathophysiology of depression. In this study, we tested eritoran (ERI), a TLR-4 receptor-4 antagonist, as a potential antidepressant. We investigated the effect of long-term administration of ERI in three different doses on behavioral changes, hippocampal and prefrontal cortex (PFC) neurogenesis, and γ-aminobutyric acid (GABA)/glutamate balance in male Wistar rats exposed to chronic restraint stress (CRS). Long-term administration of ERI ameliorated CRS-induced depressive-like symptoms and hypothalamic-pituitary-adrenal axis hyperactivity alongside reducing levels of hippocampal and PFC inflammatory cytokines, restoring GABA and glutamate balance, and enhancing PFC and hippocampal neurogenesis, by increasing BDNF gene and protein expression in a dose-dependent manner. The results demonstrate an antidepressant-like activity of ERI in Wistar rats exposed to CRS, which may be largely mediated by its ability to reduce neuroinflammation, increase BDNF, and restore GABA/glutamate balance in prefrontal cortex and hippocampus. Nonetheless, further studies are needed to characterize the mechanism of the antidepressant effect of ERI.
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Cell Type Specific Expression of Toll-Like Receptors in Human Brains and Implications in Alzheimer's Disease. BIOMED RESEARCH INTERNATIONAL 2019; 2019:7420189. [PMID: 31396533 PMCID: PMC6668540 DOI: 10.1155/2019/7420189] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/18/2019] [Accepted: 07/07/2019] [Indexed: 12/20/2022]
Abstract
Toll-like receptors mediate important cellular immune responses upon activation via various pathogenic stimuli such as bacterial or viral components. The activation and subsequent secretion of cytokines and proinflammatory factors occurs in the whole body including the brain. The subsequent inflammatory response is crucial for the immune system to clear the pathogen(s) from the body via the innate and adaptive immune response. Within the brain, astrocytes, neurons, microglia, and oligodendrocytes all bear unique compositions of Toll-like receptors. Besides pathogens, cellular damage and abnormally folded protein aggregates, such as tau and Amyloid beta peptides, have been shown to activate Toll-like receptors in neurodegenerative diseases such as Alzheimer's disease. This review provides an overview of the different cell type-specific Toll-like receptors of the human brain, their activation mode, and subsequent cellular response, as well as their activation in Alzheimer's disease. Finally, we critically evaluate the therapeutic potential of targeting Toll-like receptors for treatment of Alzheimer's disease as well as discussing the limitation of mouse models in understanding Toll-like receptor function in general and in Alzheimer's disease.
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Guo LT, Wang SQ, Su J, Xu LX, Ji ZY, Zhang RY, Zhao QW, Ma ZQ, Deng XY, Ma SP. Baicalin ameliorates neuroinflammation-induced depressive-like behavior through inhibition of toll-like receptor 4 expression via the PI3K/AKT/FoxO1 pathway. J Neuroinflammation 2019; 16:95. [PMID: 31068207 PMCID: PMC6507025 DOI: 10.1186/s12974-019-1474-8] [Citation(s) in RCA: 194] [Impact Index Per Article: 38.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2018] [Accepted: 04/01/2019] [Indexed: 12/27/2022] Open
Abstract
Background Baicalin, which is isolated from Radix Scutellariae, possesses strong biological activities including an anti-inflammation property. Recent studies have shown that the anti-inflammatory effect of baicalin is linked to toll-like receptor 4 (TLR4), which participates in pathological changes of central nervous system diseases such as depression. In this study, we explored whether baicalin could produce antidepressant effects via regulation of TLR4 signaling in mice and attempted to elucidate the underlying mechanisms. Methods A chronic unpredictable mild stress (CUMS) mice model was performed to explore whether baicalin could produce antidepressant effects via the inhibition of neuroinflammation. To clarify the role of TLR4 in the anti-neuroinflammatory efficacy of baicalin, a lipopolysaccharide (LPS) was employed in mice to specially activate TLR4 and the behavioral changes were determined. Furthermore, we used LY294002 to examine the molecular mechanisms of baicalin in regulating the expression of TLR4 in vivo and in vitro using western blot, ELISA kits, and immunostaining. In the in vitro tests, the BV2 microglia cell lines and primary microglia cultures were pretreated with baicalin and LY292002 for 1 h and then stimulated 24 h with LPS. The primary microglial cells were transfected with the forkhead transcription factor forkhead box protein O 1 (FoxO1)-specific siRNA for 5 h and then co-stimulated with baicalin and LPS to investigate whether FoxO1 participated in the effect of baicalin on TLR4 expression. Results The administration of baicalin (especially 60 mg/kg) dramatically ameliorated CUMS-induced depressive-like symptoms; substantially decreased the levels of interleukin-1 beta (IL-1β), interleukin-6 (IL-6), and tumor necrosis factor alpha (TNF-α) in the hippocampus; and significantly decreased the expression of TLR4. The activation of TLR4 by the LPS triggered neuroinflammation and evoked depressive-like behaviors in mice, which were also alleviated by the treatment with baicalin (60 mg/kg). Furthermore, the application of baicalin significantly increased the phosphorylation of phosphatidylinositol 3-kinase (PI3K), protein kinase B (AKT), and FoxO1. The application of baicalin also promoted FoxO1 nuclear exclusion and contributed to the inhibition of the FoxO1 transactivation potential, which led to the downregulation of the expression of TLR4 in CUMS mice or LPS-treated BV2 cells and primary microglia cells. However, prophylactic treatment of LY294002 abolished the above effects of baicalin. In addition, we found that FoxO1 played a vital role in baicalin by regulating the TLR4 and TLR4-mediating neuroinflammation triggered by the LPS via knocking down the expression of FoxO1 in the primary microglia. Conclusion Collectively, these results demonstrate that baicalin ameliorated neuroinflammation-induced depressive-like behaviors through the inhibition of TLR4 expression via the PI3K/AKT/FoxO1 pathway. Electronic supplementary material The online version of this article (10.1186/s12974-019-1474-8) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Li-Ting Guo
- Department of Pharmacology of Chinese Materia Medica, China Pharmaceutical University, Tongjiaxiang 24, Nanjing, 210009, Jiangsu, People's Republic of China
| | - Si-Qi Wang
- Department of Pharmacology of Chinese Materia Medica, China Pharmaceutical University, Tongjiaxiang 24, Nanjing, 210009, Jiangsu, People's Republic of China
| | - Jing Su
- Department of Pharmacology of Chinese Materia Medica, China Pharmaceutical University, Tongjiaxiang 24, Nanjing, 210009, Jiangsu, People's Republic of China
| | - Li-Xing Xu
- Department of Pharmacology of Chinese Materia Medica, China Pharmaceutical University, Tongjiaxiang 24, Nanjing, 210009, Jiangsu, People's Republic of China
| | - Zhou-Ye Ji
- Department of Pharmacology of Chinese Materia Medica, China Pharmaceutical University, Tongjiaxiang 24, Nanjing, 210009, Jiangsu, People's Republic of China
| | - Ru-Yi Zhang
- Department of Pharmacology of Chinese Materia Medica, China Pharmaceutical University, Tongjiaxiang 24, Nanjing, 210009, Jiangsu, People's Republic of China
| | - Qin-Wen Zhao
- Department of Pharmacology of Chinese Materia Medica, China Pharmaceutical University, Tongjiaxiang 24, Nanjing, 210009, Jiangsu, People's Republic of China
| | - Zhan-Qiang Ma
- Department of Pharmacology of Chinese Materia Medica, China Pharmaceutical University, Tongjiaxiang 24, Nanjing, 210009, Jiangsu, People's Republic of China.
| | - Xue-Yang Deng
- Department of Pharmacology of Chinese Materia Medica, China Pharmaceutical University, Tongjiaxiang 24, Nanjing, 210009, Jiangsu, People's Republic of China.
| | - Shi-Ping Ma
- Department of Pharmacology of Chinese Materia Medica, China Pharmaceutical University, Tongjiaxiang 24, Nanjing, 210009, Jiangsu, People's Republic of China. .,Qinba Traditional Chinese Medicine Resources Research and Development Center, AnKang University, AnKang, 725000, People's Republic of China.
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Yang J, Liu R, Lu F, Xu F, Zheng J, Li Z, Cui W, Wang C, Zhang J, Xu S, Zhou W, Wang Q, Chen J, Chen X. Fast Green FCF Attenuates Lipopolysaccharide-Induced Depressive-Like Behavior and Downregulates TLR4/Myd88/NF-κB Signal Pathway in the Mouse Hippocampus. Front Pharmacol 2019; 10:501. [PMID: 31139084 PMCID: PMC6519320 DOI: 10.3389/fphar.2019.00501] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2018] [Accepted: 04/23/2019] [Indexed: 01/09/2023] Open
Abstract
Depression is a common neuropsychiatric disorder and new anti-depressive treatments are still in urgent demand. Fast Green FCF, a safe biocompatible color additive, has been suggested to mitigate chronic pain. However, Fast green FCF’s effect on depression is unknown. We aimed to investigate Fast green FCF’s effect on lipopolysaccharide (LPS)-induced depressive-like behavior and the underlying mechanisms. Pretreatment of Fast green FCF (100 mg/kg, i.p. daily for 7 days) alleviated depressive-like behavior in LPS-treated mice. Fast green FCF suppressed the LPS-induced microglial and astrocyte activation in the hippocampus. Fast green FCF decreased the mRNA and protein levels of Toll-like receptor 4 (TLR4) and Myeloid differentiation primary response 88 (Myd88) and suppressed the phosphorylation of nuclear factor-κB (NF-κB) in the hippocampus of LPS-treated mice. Fast green FCF also downregulated hippocampal tumor necrosis factor (TNF)-α, interleukin (IL)-1β, and IL-6, but did not alter the level of the brain-derived neurotrophic factor (BDNF) in the hippocampus of LPS-treated mice. The molecular docking simulation predicts that Fast green FCF may interact with TLR4 and interrupt the formation of the TLR4-MD2 complex. In conclusion, the anti-depressive action of Fast green FCF in LPS-treated mice may involve the suppression of neuroinflammation and the downregulation of TLR4/Myd88/NF-κB signal pathway in mouse hippocampus. Our findings indicate the potential of Fast green FCF for controlling depressive symptoms.
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Affiliation(s)
- Jing Yang
- Zhejiang Key Laboratory of Pathophysiology, School of Medicine, Ningbo University, Ningbo, China
| | - Rongjun Liu
- Zhejiang Key Laboratory of Pathophysiology, School of Medicine, Ningbo University, Ningbo, China
| | - Fan Lu
- Zhejiang Key Laboratory of Pathophysiology, School of Medicine, Ningbo University, Ningbo, China
| | - Fang Xu
- Department of Anesthesiology, Ningbo No. 2 Hospital, Ningbo, China
| | - Jinwei Zheng
- Department of Anesthesiology, Ningbo No. 2 Hospital, Ningbo, China
| | - Zhao Li
- Department of Anesthesiology, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China
| | - Wei Cui
- Zhejiang Key Laboratory of Pathophysiology, School of Medicine, Ningbo University, Ningbo, China
| | - Chuang Wang
- Zhejiang Key Laboratory of Pathophysiology, School of Medicine, Ningbo University, Ningbo, China
| | - Junfang Zhang
- Zhejiang Key Laboratory of Pathophysiology, School of Medicine, Ningbo University, Ningbo, China
| | - Shujun Xu
- Zhejiang Key Laboratory of Pathophysiology, School of Medicine, Ningbo University, Ningbo, China
| | - Wenhua Zhou
- Zhejiang Key Laboratory of Pathophysiology, School of Medicine, Ningbo University, Ningbo, China
| | - Qinwen Wang
- Zhejiang Key Laboratory of Pathophysiology, School of Medicine, Ningbo University, Ningbo, China
| | - Junping Chen
- Department of Anesthesiology, Ningbo No. 2 Hospital, Ningbo, China
| | - Xiaowei Chen
- Zhejiang Key Laboratory of Pathophysiology, School of Medicine, Ningbo University, Ningbo, China
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Tsuboi H, Sakakibara H, Tatsumi A, Yamakawa-Kobayashi K, Matsunaga M, Kaneko H, Shimoi K. Serum IL-6 levels and oxidation rate of LDL cholesterol were related to depressive symptoms independent of omega-3 fatty acids among female hospital and nursing home workers in Japan. J Affect Disord 2019; 249:385-393. [PMID: 30818247 DOI: 10.1016/j.jad.2019.02.031] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/02/2018] [Revised: 01/10/2019] [Accepted: 02/11/2019] [Indexed: 01/04/2023]
Abstract
BACKGROUND Chronic low-grade inflammation and oxidative stress are commonly observed in persons with depression or depressive symptoms. We explored the degree of depressive symptoms under psychological stress in relation to serum LDL oxidation, inflammatory markers, and fatty acid (FA) distribution among female population. The purpose of this study was to identify peripheral factors that are related to depressive symptoms, and to assess how each factor is related to depressive symptoms. METHODS 133 female workers in a hospital and nursing homes were recruited in Japan. Depressive symptoms were assessed using the Japanese version of the Centre for Epidemiologic Studies Depression Scale (CES-D), and perceived stress was assessed using the visual analogue scale. Cytokine levels and oxidation rate of LDL cholesterol (ox-LDL/LDL) were measured as indices of inflammation and oxidation. Omega-3 FA distribution was also measured. Path analysis and hierarchical regression analysis were used to determine if each factor was predictive of depressive symptoms. RESULTS It was identified that serum ox-LDL/LDL was positively connected with depressive symptoms, but was more strongly related to perceived psychological stress. Elevated serum IL-6 was positively correlated with depressive symptoms, though the effect was partly transmitted via ox-LDL/LDL. Additionally, serum ω3 PUFAs were inversely associated with depressive symptoms independently of IL-6 or ox-LDL/LDL. CONCLUSION Although this study is unlikely to fully explain the causes of depressive symptoms, it suggests that psychological stress and somatic factors such as inflammation, oxidation and nutrition are related to depressive symptoms. These findings suggest the therapeutic potential of lifestyle targets to alleviate the identified depression risk factors, anti-oxidative therapies, anti-inflammatory therapies and nutritional interventions to prevent depression.
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Affiliation(s)
- Hirohito Tsuboi
- Institute of Medical, Pharmaceutical & Health Sciences, Kanazawa University, Kanazawa, Japan; Department of Neurology and Internal Psychosomatic Medicine, Bantane Hospital, Fujita Health University School of Medicine, Nagoya, Japan.
| | - Hiroyuki Sakakibara
- School of Food and Nutritional Sciences, University of Shizuoka, Shizuoka, Japan; Faculty of Agriculture, University of Miyazaki, Japan.
| | - Asami Tatsumi
- Department of Community Health Nursing, Hamamatsu University School of Medicine, Hamamatsu, Japan.
| | | | - Masahiro Matsunaga
- Department of Neurology and Internal Psychosomatic Medicine, Bantane Hospital, Fujita Health University School of Medicine, Nagoya, Japan; Department of Health and Psychosocial Medicine, Aichi Medical University School of Medicine, Nagakute, Japan.
| | - Hiroshi Kaneko
- Department of Neurology and Internal Psychosomatic Medicine, Bantane Hospital, Fujita Health University School of Medicine, Nagoya, Japan; Department of Internal Medicine, Hoshigaoka Maternity Hospital, Nagoya, Japan.
| | - Kayoko Shimoi
- School of Food and Nutritional Sciences, University of Shizuoka, Shizuoka, Japan.
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65
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Glutamatergic Signaling Along The Microbiota-Gut-Brain Axis. Int J Mol Sci 2019; 20:ijms20061482. [PMID: 30934533 PMCID: PMC6471396 DOI: 10.3390/ijms20061482] [Citation(s) in RCA: 165] [Impact Index Per Article: 33.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2019] [Revised: 03/04/2019] [Accepted: 03/21/2019] [Indexed: 12/21/2022] Open
Abstract
A complex bidirectional communication system exists between the gastrointestinal tract and the brain. Initially termed the “gut-brain axis” it is now renamed the “microbiota-gut-brain axis” considering the pivotal role of gut microbiota in maintaining local and systemic homeostasis. Different cellular and molecular pathways act along this axis and strong attention is paid to neuroactive molecules (neurotransmitters, i.e., noradrenaline, dopamine, serotonin, gamma aminobutyric acid and glutamate and metabolites, i.e., tryptophan metabolites), sustaining a possible interkingdom communication system between eukaryota and prokaryota. This review provides a description of the most up-to-date evidence on glutamate as a neurotransmitter/neuromodulator in this bidirectional communication axis. Modulation of glutamatergic receptor activity along the microbiota-gut-brain axis may influence gut (i.e., taste, visceral sensitivity and motility) and brain functions (stress response, mood and behavior) and alterations of glutamatergic transmission may participate to the pathogenesis of local and brain disorders. In this latter context, we will focus on two major gut disorders, such as irritable bowel syndrome and inflammatory bowel disease, both characterized by psychiatric co-morbidity. Research in this area opens the possibility to target glutamatergic neurotransmission, either pharmacologically or by the use of probiotics producing neuroactive molecules, as a therapeutic approach for the treatment of gastrointestinal and related psychiatric disorders.
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66
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Varodayan FP, Khom S, Patel RR, Steinman MQ, Hedges DM, Oleata CS, Homanics GE, Roberto M, Bajo M. Role of TLR4 in the Modulation of Central Amygdala GABA Transmission by CRF Following Restraint Stress. Alcohol Alcohol 2019; 53:642-649. [PMID: 29309503 PMCID: PMC6203127 DOI: 10.1093/alcalc/agx114] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2017] [Accepted: 12/08/2017] [Indexed: 12/20/2022] Open
Abstract
Aims Stress induces neuroimmune responses via Toll-like receptor 4 (TLR4) activation. Here, we investigated the role of TLR4 in the effects of the stress peptide corticotropin-releasing factor (CRF) on GABAergic transmission in the central nucleus of the amygdala (CeA) following restraint stress. Methods Tlr4 knock out (KO) and wild-type rats were exposed to no stress (naïve), a single restraint stress (1 h) or repeated restraint stress (1 h per day for 3 consecutive days). After 1 h recovery from the final stress session, whole-cell patch-clamp electrophysiology was used to investigate the effects of CRF (200 nM) on CeA GABAA-mediated spontaneous inhibitory postsynaptic currents (sIPSCs). Results TLR4 does not regulate baseline GABAergic transmission in the CeA of naive and stress-treated animals. However, CRF significantly increased the mean sIPSC frequencies (indicating enhanced GABA release) across all genotypes and stress treatments, except for the Tlr4 KO rats that experienced repeated restraint stress. Conclusions Overall, our results suggest a limited role for TLR4 in CRF's modulation of CeA GABAergic synapses in naïve and single stress rats, though TLR4-deficient rats that experienced repeated psychological stress exhibit a blunted CRF cellular response. Short Summary TLR4 has a limited role in CRF's activation of the CeA under basal conditions, but interacts with the CRF system to regulate GABAergic synapse function in animals that experience repeated psychological stress.
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Affiliation(s)
- F P Varodayan
- Department of Neuroscience, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA, USA
| | - S Khom
- Department of Neuroscience, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA, USA
| | - R R Patel
- Department of Neuroscience, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA, USA
| | - M Q Steinman
- Department of Neuroscience, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA, USA
| | - D M Hedges
- Department of Neuroscience, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA, USA
| | - C S Oleata
- Department of Neuroscience, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA, USA
| | - G E Homanics
- Departments of Anesthesiology, Pharmacology & Chemical Biology, and Neurobiology, University of 6060 Biomedical Science Tower 3, Pittsburgh, Pittsburgh, PA, USA
| | - M Roberto
- Department of Neuroscience, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA, USA
| | - M Bajo
- Department of Neuroscience, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA, USA
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Liu S, Li E, Sun Z, Fu D, Duan G, Jiang M, Yu Y, Mei L, Yang P, Tang Y, Zheng P. Altered gut microbiota and short chain fatty acids in Chinese children with autism spectrum disorder. Sci Rep 2019; 9:287. [PMID: 30670726 PMCID: PMC6342986 DOI: 10.1038/s41598-018-36430-z] [Citation(s) in RCA: 241] [Impact Index Per Article: 48.2] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2018] [Accepted: 11/21/2018] [Indexed: 02/06/2023] Open
Abstract
Autism spectrum disorder (ASD) is a neurodevelopmental disorder that is characterized by impairments in social interactions and communication, restricted interests and repetitive behaviors. Several studies report a high prevalence of gastrointestinal (GI) symptoms in autistic individuals. Cumulative evidence reveals that the gut microbiota and its metabolites (especially short-chain fatty acids, SCFAs) play an important role in GI disorders and the pathogenesis of ASD. However, the composition of the gut microbiota and its association with fecal SCFAs and GI symptoms of autistic children remain largely unknown. In the present study, we sequenced the bacterial 16S rRNA gene, detected fecal SCFAs, assessed GI symptoms and analyzed the relationship between the gut microbiome and fecal SCFAs in autistic and neurotypical individuals. The results showed that the compositions of the gut microbiota and SCFAs were altered in ASD individuals. We found lower levels of fecal acetic acid and butyrate and a higher level of fecal valeric acid in ASD subjects. We identified decreased abundances of key butyrate-producing taxa (Ruminococcaceae, Eubacterium, Lachnospiraceae and Erysipelotrichaceae) and an increased abundance of valeric acid associated bacteria (Acidobacteria) among autistic individuals. Constipation was the only GI disorder in ASD children in the present study. We also found enriched Fusobacterium, Barnesiella, Coprobacter and valeric acid-associated bacteria (Actinomycetaceae) and reduced butyrate-producing taxa in constipated autistic subjects. It is suggested that the gut microbiota contributes to fecal SCFAs and constipation in autism. Modulating the gut microbiota, especially butyrate-producing bacteria, could be a promising strategy in the search for alternatives for the treatment of autism spectrum disorder.
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Affiliation(s)
- Simeng Liu
- Department of Gastroenterology, the Fifth Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, China
| | - Enyao Li
- Department of Children Rehabilitation Medicine, the Fifth Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, China
| | - Zhenyu Sun
- Department of Children Rehabilitation Medicine, the Fifth Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, China
| | - Dongjun Fu
- School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou, Henan, 450001, China
| | - Guiqin Duan
- Center of Children Psychology and Behavior, the Third Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, China
| | - Miaomiao Jiang
- Department of Children Rehabilitation Medicine, the Fifth Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, China
| | - Yong Yu
- Department of Gastroenterology, the Fifth Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, China
| | - Lu Mei
- Department of Gastroenterology, the Fifth Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, China
| | - Pingchang Yang
- Brain Body Institute, McMaster University, Hamilton, ON, Canada
| | - Youcai Tang
- Department of Children Rehabilitation Medicine, the Fifth Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, China. .,Department of Pediatrics, the Fifth Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, China.
| | - Pengyuan Zheng
- Department of Gastroenterology, the Fifth Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, China.
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Chronic stress-induced gut dysfunction exacerbates Parkinson's disease phenotype and pathology in a rotenone-induced mouse model of Parkinson's disease. Neurobiol Dis 2018; 135:104352. [PMID: 30579705 DOI: 10.1016/j.nbd.2018.12.012] [Citation(s) in RCA: 154] [Impact Index Per Article: 25.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2018] [Revised: 11/19/2018] [Accepted: 12/19/2018] [Indexed: 02/07/2023] Open
Abstract
Recent evidence provides support for involvement of the microbiota-gut-brain axis in Parkinson's disease (PD) pathogenesis. We propose that a pro-inflammatory intestinal milieu, due to intestinal hyper-permeability and/or microbial dysbiosis, initiates or exacerbates PD pathogenesis. One factor that can cause intestinal hyper-permeability and dysbiosis is chronic stress which has been shown to accelerate neuronal degeneration and motor deficits in Parkinsonism rodent models. We hypothesized that stress-induced intestinal barrier dysfunction and microbial dysbiosis lead to a pro-inflammatory milieu that exacerbates the PD phenotype in the low-dose oral rotenone PD mice model. To test this hypothesis, mice received unpredictable restraint stress (RS) for 12 weeks, and during the last six weeks mice also received a daily administration of low-dose rotenone (10 mg/kg/day) orally. The initial six weeks of RS caused significantly higher urinary cortisol, intestinal hyperpermeability, and decreased abundance of putative "anti-inflammatory" bacteria (Lactobacillus) compared to non-stressed mice. Rotenone alone (i.e., without RS) disrupted the colonic expression of the tight junction protein ZO-1, increased oxidative stress (N-tyrosine), increased myenteric plexus enteric glial cell GFAP expression and increased α-synuclein (α-syn) protein levels in the colon compared to controls. Restraint stress exacerbated these rotenone-induced changes. Specifically, RS potentiated rotenone-induced effects in the colon including: 1) intestinal hyper-permeability, 2) disruption of tight junction proteins (ZO-1, Occludin, Claudin1), 3) oxidative stress (N-tyrosine), 4) inflammation in glial cells (GFAP + enteric glia cells), 5) α-syn, 6) increased relative abundance of fecal Akkermansia (mucin-degrading Gram-negative bacteria), and 7) endotoxemia. In addition, RS promoted a number of rotenone-induced effects in the brain including: 1) reduced number of resting microglia and a higher number of dystrophic/phagocytic microglia as well as (FJ-C+) dying cells in the substantia nigra (SN), 2) increased lipopolysaccharide (LPS) reactivity in the SN, and 3) reduced dopamine (DA) and DA metabolites (DOPAC, HVA) in the striatum compared to control mice. Our findings support a model in which chronic stress-induced, gut-derived, pro-inflammatory milieu exacerbates the PD phenotype via a dysfunctional microbiota-gut-brain axis.
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Meknatkhah S, Sharif Dashti P, Mousavi MS, Zeynali A, Ahmadian S, Karima S, Saboury AA, Riazi GH. Psychological stress effects on myelin degradation in the cuprizone-induced model of demyelination. Neuropathology 2018; 39:14-21. [PMID: 30536911 DOI: 10.1111/neup.12522] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2018] [Revised: 09/28/2018] [Accepted: 09/29/2018] [Indexed: 01/02/2023]
Abstract
Multiple sclerosis (MS) is known as the most common demyelinating disease worldwide in which previous studies have shown that stress is a risk factor for the disease's onset and progression. Nevertheless, further studies are needed to investigate the consequences of stress in MS pathology. In this study, after 5 days of exposure to psychological and physical stress as a repetitive distress modality, rats were treated with cuprizone. The demyelination degree was compared in animal groups using Luxol fast blue staining, immunohistochemical staining for myelin basic protein and transmission electron microscopy. Outcomes revealed that animals exposed to stress prior to cuprizone ingestion, elicit more intense demyelination. Continuous psychological distress has more severe effects on myelin sheath destruction in the preclinical stage.
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Affiliation(s)
- Sogol Meknatkhah
- Institute of Biochemistry and Biophysics, University of Tehran, Tehran, Iran
| | - Pouya Sharif Dashti
- Department of Chemical Engineering, Faculty of Engineering, University of Tehran, Tehran, Iran
| | | | - Amirbahador Zeynali
- Department of Physics, Iran University of Science and Technology, Tehran, Iran
| | - Shahin Ahmadian
- Institute of Biochemistry and Biophysics, University of Tehran, Tehran, Iran
| | - Saeed Karima
- Clinical Biochemistry Department, Faculty of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Ali Akbar Saboury
- Institute of Biochemistry and Biophysics, University of Tehran, Tehran, Iran
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Astragaloside IV ameliorates neuroinflammation-induced depressive-like behaviors in mice via the PPARγ/NF-κB/NLRP3 inflammasome axis. Acta Pharmacol Sin 2018; 39:1559-1570. [PMID: 29795356 DOI: 10.1038/aps.2017.208] [Citation(s) in RCA: 67] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2017] [Accepted: 12/31/2017] [Indexed: 12/28/2022] Open
Abstract
Major depressive disorder is a common but devastating mental disorder, and recent evidence shows that neuroinflammation may play a pivotal role in the etiology of depression. Astragaloside IV (AS-IV) is an active component purifed from Astragalus membranaceus (Fisch) Bge, which has shown anti-inflammatory, anti-oxidative and anti-apoptotic effects. In this study, we explored whether AS-IV produced antidepressant effects via its inhibition of neuroinflammation in mouse models of depression. Depressive-like behaviors including decreased sucrose consumption, reduced locomotor activity and increased immobility time were induced in mice using repeated restraint stress (RRS). We found that administration of AS-IV (16, 32 and 64 mg·kg-1·d-1, ig) significantly attenuated RRS-induced depressive-like behaviors. Furthermore, AS-IV administration significantly reduced the levels of TNF-α and IL-1β, increased PPARγ expression and GSK3β phosphorylation, decreased NF-κB phosphorylation, and reduced NOD-, LRR- and pyrin domain-containingprotein 3 (NLRP3) inflammasome and caspase-1 p20 generation in the hippocampus of the mice. LPS-induced depression-like behaviors were induced by LPS injection (1 mg·kg-1·d-1, ip), which were ameliorated by administration of AS-IV (20, 40 mg·kg-1·d-1, ig). The results of the LPS-induced mouse model were in accordance with those acquired from the RRS-induced mouse model: LPS injection significantly increased TNF-α and IL-1β expression in the mouse hippocampus, which was reversed by administration of AS-IV. Moreover, administration of AS-IV significantly increased PPARγ expression and GSK3β phosphorylation, and decreased NF-κB phosphorylation and NLRP3 inflammasome. These results suggest that AS-IV is a potential drug against depression, and its antidepressant effects are partially mediated by inhibition of neuroinflammation via the upregulation of PPARγ expression.
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Martín-Hernández D, Caso JR, Javier Meana J, Callado LF, Madrigal JLM, García-Bueno B, Leza JC. Intracellular inflammatory and antioxidant pathways in postmortem frontal cortex of subjects with major depression: effect of antidepressants. J Neuroinflammation 2018; 15:251. [PMID: 30180869 PMCID: PMC6122627 DOI: 10.1186/s12974-018-1294-2] [Citation(s) in RCA: 52] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2018] [Accepted: 08/28/2018] [Indexed: 12/25/2022] Open
Abstract
BACKGROUND Studies show that Toll-like receptors (TLRs), members of the innate immune system, might participate in the pathogenesis of the major depressive disorder (MDD). However, evidence of this participation in the brain of patients with MDD has been elusive. METHODS This work explores whether the protein expression by immunodetection assays (Western blot) of elements of TLR-4 pathways controlling inflammation and the oxidative/nitrosative stress are altered in postmortem dorsolateral prefrontal cortex of subjects with MDD. The potential modulation induced by the antidepressant treatment on these parameters was also assessed. Thirty MDD subjects (15 antidepressant-free and 15 under antidepressant treatment) were matched for gender and age to 30 controls in a paired design. RESULTS No significant changes in TLR-4 expression were detected. An increased expression of the TLR-4 endogenous ligand Hsp70 (+ 33%), but not of Hsp60, and the activated forms of mitogen-activated protein kinases (MAPKs) p38 (+ 47%) and JNK (+ 56%) was observed in MDD. Concomitantly, MDD subjects present a 45% decreased expression of DUSP2 (a regulator of MAPKs) and reduced (- 21%) expression of the antioxidant nuclear factor Nrf2. Antidepressant treatment did not modify the changes detected in the group with MDD and actually increased (+ 25%) the expression of p11, a protein linked with the transport of neurotransmitters and depression. CONCLUSION Data indicate an altered TLR-4 immune response in the brain of subjects with MDD. Additional research focused on the mechanisms contributing to the antidepressant-induced TLR-4 pathway modulation is warranted and could help to develop new treatment strategies for MDD.
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Affiliation(s)
- David Martín-Hernández
- Centro de Investigación Biomédica en Red de Salud Mental (CIBERSAM), Instituto de Salud Carlos III (ISCIII), C/ Monforte de Lemos 3-5, 28029, Madrid, Spain.,Departamento de Farmacología y Toxicología, Facultad de Medicina, Universidad Complutense de Madrid, Instituto Universitario de Investigación en Neuroquímica UCM, Avda. Complutense s/n, 28040, Madrid, Spain.,Instituto de Investigación Sanitaria Hospital 12 de Octubre (Imas12), Avda. de Córdoba, s/n, 28041, Madrid, Spain
| | - Javier R Caso
- Centro de Investigación Biomédica en Red de Salud Mental (CIBERSAM), Instituto de Salud Carlos III (ISCIII), C/ Monforte de Lemos 3-5, 28029, Madrid, Spain. .,Departamento de Farmacología y Toxicología, Facultad de Medicina, Universidad Complutense de Madrid, Instituto Universitario de Investigación en Neuroquímica UCM, Avda. Complutense s/n, 28040, Madrid, Spain. .,Instituto de Investigación Sanitaria Hospital 12 de Octubre (Imas12), Avda. de Córdoba, s/n, 28041, Madrid, Spain.
| | - J Javier Meana
- Centro de Investigación Biomédica en Red de Salud Mental (CIBERSAM), Instituto de Salud Carlos III (ISCIII), C/ Monforte de Lemos 3-5, 28029, Madrid, Spain.,Departamento de Farmacología, Universidad del País Vasco, UPV/EHU, B. Sarriena s/n, 48940, Leioa, Bizkaia, Spain.,Instituto de Investigación Sanitaria Biocruces, Plaza de Cruces s/n, 48903, Barakaldo, Bizkaia, Spain
| | - Luis F Callado
- Centro de Investigación Biomédica en Red de Salud Mental (CIBERSAM), Instituto de Salud Carlos III (ISCIII), C/ Monforte de Lemos 3-5, 28029, Madrid, Spain.,Departamento de Farmacología, Universidad del País Vasco, UPV/EHU, B. Sarriena s/n, 48940, Leioa, Bizkaia, Spain.,Instituto de Investigación Sanitaria Biocruces, Plaza de Cruces s/n, 48903, Barakaldo, Bizkaia, Spain
| | - José L M Madrigal
- Centro de Investigación Biomédica en Red de Salud Mental (CIBERSAM), Instituto de Salud Carlos III (ISCIII), C/ Monforte de Lemos 3-5, 28029, Madrid, Spain.,Departamento de Farmacología y Toxicología, Facultad de Medicina, Universidad Complutense de Madrid, Instituto Universitario de Investigación en Neuroquímica UCM, Avda. Complutense s/n, 28040, Madrid, Spain.,Instituto de Investigación Sanitaria Hospital 12 de Octubre (Imas12), Avda. de Córdoba, s/n, 28041, Madrid, Spain
| | - Borja García-Bueno
- Centro de Investigación Biomédica en Red de Salud Mental (CIBERSAM), Instituto de Salud Carlos III (ISCIII), C/ Monforte de Lemos 3-5, 28029, Madrid, Spain.,Departamento de Farmacología y Toxicología, Facultad de Medicina, Universidad Complutense de Madrid, Instituto Universitario de Investigación en Neuroquímica UCM, Avda. Complutense s/n, 28040, Madrid, Spain.,Instituto de Investigación Sanitaria Hospital 12 de Octubre (Imas12), Avda. de Córdoba, s/n, 28041, Madrid, Spain
| | - Juan C Leza
- Centro de Investigación Biomédica en Red de Salud Mental (CIBERSAM), Instituto de Salud Carlos III (ISCIII), C/ Monforte de Lemos 3-5, 28029, Madrid, Spain.,Departamento de Farmacología y Toxicología, Facultad de Medicina, Universidad Complutense de Madrid, Instituto Universitario de Investigación en Neuroquímica UCM, Avda. Complutense s/n, 28040, Madrid, Spain.,Instituto de Investigación Sanitaria Hospital 12 de Octubre (Imas12), Avda. de Córdoba, s/n, 28041, Madrid, Spain
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Gong H, Su WJ, Cao ZY, Lian YJ, Peng W, Liu YZ, Zhang Y, Liu LL, Wu R, Wang B, Zhang T, Wang YX, Jiang CL. Hippocampal Mrp8/14 signaling plays a critical role in the manifestation of depressive-like behaviors in mice. J Neuroinflammation 2018; 15:252. [PMID: 30180864 PMCID: PMC6122683 DOI: 10.1186/s12974-018-1296-0] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2017] [Accepted: 08/29/2018] [Indexed: 12/17/2022] Open
Abstract
Background Depression is one of the most common mental disorders characterized mainly by low mood and loss of interest or pleasure. About a third of patients with depression do not respond to classic antidepressant treatments. Recent evidence suggests that Mrp8/14 (myeloid-related protein 8/14) plays a crucial role in cognitive dysfunction and neuroinflammatory diseases, yet its role in mood regulation remains largely uninvestigated. In the present work, we explored the potential role of Mrp8/14 in the progression of depression. Methods After 4 weeks of chronic unpredictable mild stress (CUMS), depressive-like symptoms and Mrp8/14 were determined. To verify the effects of Mrp8/14 on depressive-like behaviors, the inhibitor TAK-242 and recombinant Mrp8/14 were used. Furthermore, the molecular mechanisms in Mrp8/14-induced behavioral and biological changes were examined in vivo and ex vivo. Results Four-week CUMS contributed to the development of depressive symptoms. Mrp8 and Mrp14 were upregulated in the hippocampus and serum after exposure to CUMS. Pharmacological inhibition of Mrp14 attenuated CUMS-induced TLR4/NF-κB signaling activation and depressive-like behaviors. Furthermore, central administration of recombinant Mrp8, Mrp14, and Mrp8/14 resulted in neuroinflammation and depressive-like behaviors. Mrp8/14-provoked proinflammatory effects and depressive-like behaviors were improved by pretreatment with a TLR4 inhibitor. Moreover, pharmacological inhibition of TLR4 reduced the release of nitric oxide and reactive oxygen species in Mrp8/14-activated BV2 microglia. Conclusions These data suggest that the hippocampal Mrp8/14-TLR4-mediated neuroinflammation contributes to the development of depressive-like behaviors. Targeting the Mrp8/14 may be a novel promising antidepressant approach. Electronic supplementary material The online version of this article (10.1186/s12974-018-1296-0) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Hong Gong
- Department of Stress Medicine, Faculty of Psychology and Mental Health, Second Military Medical University, Shanghai, 200433, People's Republic of China.,Hainan Branch of Chinese PLA General Hospital, Sanya, 572013, People's Republic of China
| | - Wen-Jun Su
- Department of Stress Medicine, Faculty of Psychology and Mental Health, Second Military Medical University, Shanghai, 200433, People's Republic of China
| | - Zhi-Yong Cao
- Department of Stress Medicine, Faculty of Psychology and Mental Health, Second Military Medical University, Shanghai, 200433, People's Republic of China.,Department of Psychiatry, The 102nd Hospital of PLA, Changzhou, 213003, People's Republic of China
| | - Yong-Jie Lian
- Department of Stress Medicine, Faculty of Psychology and Mental Health, Second Military Medical University, Shanghai, 200433, People's Republic of China
| | - Wei Peng
- Department of Stress Medicine, Faculty of Psychology and Mental Health, Second Military Medical University, Shanghai, 200433, People's Republic of China
| | - Yun-Zi Liu
- Department of Stress Medicine, Faculty of Psychology and Mental Health, Second Military Medical University, Shanghai, 200433, People's Republic of China
| | - Yi Zhang
- Department of Psychiatry, Faculty of Psychology and Mental Health, Second Military Medical University, Shanghai, 200433, People's Republic of China
| | - Lin-Lin Liu
- Department of Stress Medicine, Faculty of Psychology and Mental Health, Second Military Medical University, Shanghai, 200433, People's Republic of China
| | - Ran Wu
- Department of Stress Medicine, Faculty of Psychology and Mental Health, Second Military Medical University, Shanghai, 200433, People's Republic of China
| | - Bo Wang
- Department of Stress Medicine, Faculty of Psychology and Mental Health, Second Military Medical University, Shanghai, 200433, People's Republic of China
| | - Ting Zhang
- Department of Navy Medicine, Second Military Medical University, Shanghai, 200433, People's Republic of China
| | - Yun-Xia Wang
- Department of Stress Medicine, Faculty of Psychology and Mental Health, Second Military Medical University, Shanghai, 200433, People's Republic of China
| | - Chun-Lei Jiang
- Department of Stress Medicine, Faculty of Psychology and Mental Health, Second Military Medical University, Shanghai, 200433, People's Republic of China.
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73
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Ciavarra RP, Machida M, Lundberg PS, Gauronskas P, Wellman LL, Steel C, Aflatooni JO, Sanford LD. Controllable and uncontrollable stress differentially impact pathogenicity and survival in a mouse model of viral encephalitis. J Neuroimmunol 2018; 319:130-141. [PMID: 29580714 DOI: 10.1016/j.jneuroim.2018.02.014] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2018] [Revised: 02/20/2018] [Accepted: 02/21/2018] [Indexed: 01/08/2023]
Abstract
Intranasal instillation of vesicular stomatitis virus (VSV) into mice given controllable stress (modeled by escapable foot shock, ES) resulted in enhanced pathogenicity and decreased survival relative to infected mice given uncontrollable stress (modeled by inescapable foot shock, IS) and non-shocked control mice. Survival likely reflected differential cytokine gene expression that may have been regulated by miR146a, a predicted stress-responsive upstream regulator. Controllability also enhanced the accumulation of brain T resident memory cells that persisted long after viral clearance. The unexpected facilitatory effect of ES on antiviral neuroimmune responses and pathogenicity may arise from differential immunoactivating and immunosuppressive effects of uncontrollable and controllable stress.
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Affiliation(s)
- Richard P Ciavarra
- Department of Microbiology and Molecular Cell Biology, Eastern Virginia Medical School, Norfolk, VA 23501, United States; Department of Microbiology and Molecular and Cell Biology, Eastern Virginia Medical School, 700 W Olney Road, Norfolk, VA 23501, United States.
| | - Mayumi Machida
- Sleep Research Laboratory, Department of Pathology and Anatomy, Eastern Virginia Medical School, Norfolk, VA 23501, United States
| | - Patric S Lundberg
- Department of Microbiology and Molecular Cell Biology, Eastern Virginia Medical School, Norfolk, VA 23501, United States
| | - Phillip Gauronskas
- Department of Microbiology and Molecular Cell Biology, Eastern Virginia Medical School, Norfolk, VA 23501, United States
| | - Laurie L Wellman
- Sleep Research Laboratory, Department of Pathology and Anatomy, Eastern Virginia Medical School, Norfolk, VA 23501, United States
| | - Christina Steel
- Department of Microbiology and Molecular Cell Biology, Eastern Virginia Medical School, Norfolk, VA 23501, United States
| | - Justin O Aflatooni
- Department of Microbiology and Molecular Cell Biology, Eastern Virginia Medical School, Norfolk, VA 23501, United States
| | - Larry D Sanford
- Sleep Research Laboratory, Department of Pathology and Anatomy, Eastern Virginia Medical School, Norfolk, VA 23501, United States
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74
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Bauer ME, Teixeira AL. Inflammation in psychiatric disorders: what comes first? Ann N Y Acad Sci 2018; 1437:57-67. [PMID: 29752710 DOI: 10.1111/nyas.13712] [Citation(s) in RCA: 267] [Impact Index Per Article: 44.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2017] [Revised: 02/26/2018] [Accepted: 03/14/2018] [Indexed: 12/13/2022]
Abstract
Neuropsychiatric disorders (i.e., mood disorders and schizophrenia) and inflammation are closely intertwined, and possibly powering each other in a bidirectional loop. Depression facilitates inflammatory reactions and inflammation promotes depression and other neuropsychiatric disorders. Patients with neuropsychiatric disorders exhibit all cardinal features of inflammation, including increased circulating levels of inflammatory inducers, activated sensors, and inflammatory mediators targeting all tissues. Inflammation may contribute to the pathophysiology and clinical progression of these disorders. Of note, proinflammatory cytokines modulate mood behavior and cognition by reducing brain monoamine levels, activating neuroendocrine responses, promoting excitotoxicity (increased glutamate levels), and impairing brain plasticity. What are the sources of this chronic inflammation? Increasing evidence indicates that changes in neuroendocrine regulation, metabolism, diet/microbiota, and negative health behaviors are important triggers of inflammation. Finally, recent data indicate that early-life stress is associated with overt inflammation prior to the development of neuropsychiatric disorders.
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Affiliation(s)
- Moisés E Bauer
- Laboratory of Stress Immunology, School of Sciences, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre, Brazil.,National Institute of Science and Technology - Neuroimmunomodulation (INCT-NIM), Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq), Brasília, Brazil
| | - Antonio L Teixeira
- Department of Psychiatry and Behavioral Sciences, The University of Texas Health Science Center at Houston, Houston, Texas
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75
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Amiresmaeili A, Roohollahi S, Mostafavi A, Askari N. Effects of oregano essential oil on brain TLR4 and TLR2 gene expression and depressive-like behavior in a rat model. Res Pharm Sci 2018; 13:130-141. [PMID: 29606967 PMCID: PMC5842484 DOI: 10.4103/1735-5362.223795] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
The aim of the present study was to evaluate the effects of oregano essential oil (OEO) on the hippocampus and prefrontal cortex TLR 2/4 gene expression and depressive like behavior induced by chronic unpredictable stress (CUS). Sucrose preference and forced swim tests were adopted to examine the antidepressant effect. Control (CON), OEO, CUS, and CUS + OEO groups were used. The OEO and CUS + OEO groups received OEO (0.2 mL/kg, i.p.), CON and CUS received saline (0.2 mL/kg, i.p.), and the positive drug groups of CUS rats received fluoxetine (10 mg/kg) and diazepam (3 mg/kg) once daily for 14 days. The expression of TLR 2/4 was determined using real time quantitative polymerase chain reaction with the SYBR green reporter dye. The compositions of the OEO were determined by gas chromatography-mass spectroscopy. The main constituents were thymol (20.72%), gamma-terpinene (8.83%), borneol (8.72%), cymene (6.83%), carvacrol (6.274%), alfa-terpinene (5.26%), and sabinene (4.92%). Administration of OEO significantly alleviated the depressive symptoms of CUS. A higher level of TLR2/4 mRNA was seen in the brain of CUS group (P < 0.05). The CUS-induced increases in the TLR2/4 levels were not reversed by OEO. According to the present study OEO may have the antidepressant-like activity but have no effect on the stress-induced TLR-2/4 upregulation.
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Affiliation(s)
- Azam Amiresmaeili
- Department of Biology, Faculty of Sciences, Shahid Bahonar University of Kerman, Kerman, I.R. Iran
| | - Samira Roohollahi
- Department of Biology, Faculty of Sciences, Shahid Bahonar University of Kerman, Kerman, I.R. Iran
| | - Ali Mostafavi
- Department of Chemistry, Faculty of Sciences, Shahid Bahonar University of Kerman, Kerman, I.R. Iran
| | - Nayere Askari
- Department of Biology, Faculty of Sciences, Shahid Bahonar University of Kerman, Kerman, I.R. Iran
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76
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Femenia T, Qian Y, Arentsen T, Forssberg H, Diaz Heijtz R. Toll-like receptor-4 regulates anxiety-like behavior and DARPP-32 phosphorylation. Brain Behav Immun 2018; 69:273-282. [PMID: 29221855 DOI: 10.1016/j.bbi.2017.11.022] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/30/2017] [Revised: 11/30/2017] [Accepted: 11/30/2017] [Indexed: 12/28/2022] Open
Abstract
Toll-like receptors (TLRs) play a crucial role in early innate immune responses to inflammatory agents and pathogens. In the brain, some members of the TLR family are expressed in glial cells and neurons. In particular, TLR4 has been involved in learning and memory processes, stress-induced adaptations, and pathogenesis of neurodegenerative disorders. However, the role of TLR4 in emotional behaviors and their underlying mechanisms are poorly understood. In this study, we investigated the role of TLR4 in emotional and social behavior by using different behavioral approaches, and assessed potential molecular alterations in important brain areas involved in emotional responses. TLR4 knockout (KO) mice displayed increased anxiety-like behavior and reduced social interaction compared to wild type control mice. This behavioral phenotype was associated with an altered expression of genes known to be involved in emotional behavior [e.g., brain-derived neurotrophic factor (BDNF) and metabotropic glutamate receptors (mGluRs)]. Interestingly, the mRNA expression of dopamine- and cAMP-regulated phosphoprotein-32 (DARPP-32) was strongly upregulated in emotion-related regions of the brain in TLR4 KO mice. In addition, the phosphorylation levels at Thr75 and Ser97 in DARPP-32 were increased in the frontal cortex of TLR4 KO male mice. These findings indicate that TLR4 signaling is involved in emotional regulation through modulation of DARPP-32, which is a signaling hub that plays a critical role in the integration of numerous neurotransmitter systems, including dopamine and glutamate.
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Affiliation(s)
- T Femenia
- Department of Neuroscience, Karolinska Institutet, 171 77 Stockholm, Sweden.
| | - Y Qian
- Department of Neuroscience, Karolinska Institutet, 171 77 Stockholm, Sweden
| | - T Arentsen
- Department of Neuroscience, Karolinska Institutet, 171 77 Stockholm, Sweden
| | - H Forssberg
- Department of Women's and Children's Health, Karolinska Institutet, 171 76 Stockholm, Sweden
| | - R Diaz Heijtz
- Department of Neuroscience, Karolinska Institutet, 171 77 Stockholm, Sweden
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77
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Moschopoulos C, Kratimenos P, Koutroulis I, Shah BV, Mowes A, Bhandari V. The Neurodevelopmental Perspective of Surgical Necrotizing Enterocolitis: The Role of the Gut-Brain Axis. Mediators Inflamm 2018; 2018:7456857. [PMID: 29686534 PMCID: PMC5866871 DOI: 10.1155/2018/7456857] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2017] [Revised: 01/22/2018] [Accepted: 02/05/2018] [Indexed: 02/07/2023] Open
Abstract
This state-of-the-art review article aims to highlight the most recent evidence about the therapeutic options of surgical necrotizing enterocolitis, focusing on the molecular basis of the gut-brain axis in relevance to the neurodevelopmental outcomes of primary peritoneal drainage and primary laparotomy. Current evidence favors primary laparotomy over primary peritoneal drainage as regards neurodevelopment in the surgical treatment of necrotizing enterocolitis. The added exposure to inhalational anesthesia in infants undergoing primary laparotomy is an additional confounding variable but requires further study. The concept of the gut-brain axis suggests that bowel injury initiates systemic inflammation potentially affecting the developing central nervous system. Signals about microbes in the gut are transduced to the brain and the limbic system via the enteric nervous system, autonomic nervous system, and hypothalamic-pituitary axis. Preterm infants with necrotizing enterocolitis have significant differences in the diversity of the microbiome compared with preterm controls. The gut bacterial flora changes remarkably prior to the onset of necrotizing enterocolitis with a predominance of pathogenic organisms. The type of initial surgical approach correlates with the length of functional gut and microbiome equilibrium influencing brain development and function through the gut-brain axis. Existing data favor patients who were treated with primary laparotomy over those who underwent primary peritoneal drainage in terms of neurodevelopmental outcomes. We propose that this is due to the sustained injurious effect of the remaining diseased and necrotic bowel on the developing newborn brain, in patients treated with primary peritoneal drainage, through the gut-brain axis and probably not due to the procedure itself.
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Affiliation(s)
- Chariton Moschopoulos
- 1Department of Pediatrics, Flushing Hospital Medical Center, SUNY-Stonybrook School of Medicine, Flushing, NY, USA
| | - Panagiotis Kratimenos
- 2Division of Neonatology and Center for Research in Neuroscience, Children's National Medical Center, George Washington University School of Medicine, Washington, DC, USA
| | - Ioannis Koutroulis
- 3Department of Emergency Medicine, Children's National Medical Center, George Washington University School of Medicine, Washington, DC, USA
| | - Bhairav V. Shah
- 4Division of Pediatric Surgery, Palmetto Health Children's Hospital, University of South Carolina School of Medicine, Columbia, SC, USA
| | - Anja Mowes
- 5St. Christopher's Hospital for Children, Drexel University College of Medicine, Philadelphia, PA, USA
| | - Vineet Bhandari
- 5St. Christopher's Hospital for Children, Drexel University College of Medicine, Philadelphia, PA, USA
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Cathepsin C Aggravates Neuroinflammation Involved in Disturbances of Behaviour and Neurochemistry in Acute and Chronic Stress-Induced Murine Model of Depression. Neurochem Res 2018. [DOI: 10.1007/s11064-017-2320-y] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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79
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Yang C, Gao J, Du J, Yang X, Jiang J. Altered Neuroendocrine Immune Responses, a Two-Sword Weapon against Traumatic Inflammation. Int J Biol Sci 2017; 13:1409-1419. [PMID: 29209145 PMCID: PMC5715524 DOI: 10.7150/ijbs.21916] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2017] [Accepted: 09/23/2017] [Indexed: 12/22/2022] Open
Abstract
During the occurrence and development of injury (trauma, hemorrhagic shock, ischemia and hypoxia), the neuroendocrine and immune system act as a prominent navigation leader and possess an inter-system crosstalk between the reciprocal information dissemination. The fundamental reason that neuroendocrinology and immunology could mix each other and permeate toward the field of traumatology is owing to their same biological languages or chemical information molecules (hormones, neurotransmitters, neuropeptides, cytokines and their corresponding receptors) shared by the neuroendocrine and immune systems. The immune system is not only modulated by the neuroendocrine system, but also can modulate the biological functions of the neuroendocrine system. The interactive linkage of these three systems precipitates the complicated space-time patterns for the courses of traumatic inflammation. Recently, compelling evidence indicates that the network linkage pattern that initiating agents of neuroendocrine responses, regulatory elements of immune cells and effecter targets for immune regulatory molecules arouse the resistance mechanism disorders, which supplies the beneficial enlightenment for the diagnosis and therapy of traumatic complications from the view of translational medicine. Here we review the alternative protective and detrimental roles as well as possible mechanisms of the neuroendocrine immune responses in traumatic inflammation.
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Affiliation(s)
- Ce Yang
- State Key Laboratory of Trauma, Burns and Combined Injury, Institute of Surgery Research, Daping Hospital, Third Military Medical University, Chongqing, 400042, China
| | - Jie Gao
- State Key Laboratory of Trauma, Burns and Combined Injury, Institute of Surgery Research, Daping Hospital, Third Military Medical University, Chongqing, 400042, China
| | - Juan Du
- State Key Laboratory of Trauma, Burns and Combined Injury, Institute of Surgery Research, Daping Hospital, Third Military Medical University, Chongqing, 400042, China
| | - Xuetao Yang
- State Key Laboratory of Trauma, Burns and Combined Injury, Institute of Surgery Research, Daping Hospital, Third Military Medical University, Chongqing, 400042, China
| | - Jianxin Jiang
- State Key Laboratory of Trauma, Burns and Combined Injury, Institute of Surgery Research, Daping Hospital, Third Military Medical University, Chongqing, 400042, China
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Pharmacologic activation of cholinergic alpha7 nicotinic receptors mitigates depressive-like behavior in a mouse model of chronic stress. J Neuroinflammation 2017; 14:234. [PMID: 29197398 PMCID: PMC5712092 DOI: 10.1186/s12974-017-1007-2] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2017] [Accepted: 11/20/2017] [Indexed: 02/07/2023] Open
Abstract
Background It has been shown that chronic stress-induced depression is associated with exaggerated inflammatory response in the brain. Alpha7 nicotinic acetylcholine receptors (α7nAChRs) regulate the cholinergic anti-inflammatory pathway, but the role of cholinergic signaling and α7nAChR in chronic stress has not yet been examined. Methods In this study, we used a well-documented model of depression in which mice were exposed to 6 h of restraint stress for 21 consecutive days. Components of cholinergic signaling and TLR4 signaling were analyzed in the hippocampus. The main targets of neuroinflammation and neuronal damage were also evaluated after a series of tests for depression-like behavior. Results Chronic restraint stress (CRS) induced alterations in components of central cholinergic signaling in hippocampus, including increases in choline acetyltransferase protein expression and decreases in nuclear STAT3 signaling. CRS also increased TLR4 signaling activity, interleukin-1β, and tumor necrosis factor-α expression, microglial activation, and neuronal morphologic changes. Cholinergic stimulation with the α7nAChR agonist DMXBA significantly alleviated CRS-induced depressive-like behavior, neuroinflammation, and neuronal damage, but these effects were abolished by the selective α7nAChR antagonist α-bungarotoxin. Furthermore, activation of α7nAChRs restored the central cholinergic signaling function, inhibited TLR4-mediated inflammatory signaling and microglial activity, and increased the number of regulatory T cells in the hippocampus. Conclusions These findings provide evidence that α7nAChR activation mitigates CRS-induced neuroinflammation and cell death, suggesting that α7nAChRs could be a new therapeutic target for the prevention and treatment of depression. Electronic supplementary material The online version of this article (10.1186/s12974-017-1007-2) contains supplementary material, which is available to authorized users.
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81
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Holzer P, Farzi A, Hassan AM, Zenz G, Jačan A, Reichmann F. Visceral Inflammation and Immune Activation Stress the Brain. Front Immunol 2017; 8:1613. [PMID: 29213271 PMCID: PMC5702648 DOI: 10.3389/fimmu.2017.01613] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2017] [Accepted: 11/07/2017] [Indexed: 12/20/2022] Open
Abstract
Stress refers to a dynamic process in which the homeostasis of an organism is challenged, the outcome depending on the type, severity, and duration of stressors involved, the stress responses triggered, and the stress resilience of the organism. Importantly, the relationship between stress and the immune system is bidirectional, as not only stressors have an impact on immune function, but alterations in immune function themselves can elicit stress responses. Such bidirectional interactions have been prominently identified to occur in the gastrointestinal tract in which there is a close cross-talk between the gut microbiota and the local immune system, governed by the permeability of the intestinal mucosa. External stressors disturb the homeostasis between microbiota and gut, these disturbances being signaled to the brain via multiple communication pathways constituting the gut-brain axis, ultimately eliciting stress responses and perturbations of brain function. In view of these relationships, the present article sets out to highlight some of the interactions between peripheral immune activation, especially in the visceral system, and brain function, behavior, and stress coping. These issues are exemplified by the way through which the intestinal microbiota as well as microbe-associated molecular patterns including lipopolysaccharide communicate with the immune system and brain, and the mechanisms whereby overt inflammation in the GI tract impacts on emotional-affective behavior, pain sensitivity, and stress coping. The interactions between the peripheral immune system and the brain take place along the gut-brain axis, the major communication pathways of which comprise microbial metabolites, gut hormones, immune mediators, and sensory neurons. Through these signaling systems, several transmitter and neuropeptide systems within the brain are altered under conditions of peripheral immune stress, enabling adaptive processes related to stress coping and resilience to take place. These aspects of the impact of immune stress on molecular and behavioral processes in the brain have a bearing on several disturbances of mental health and highlight novel opportunities of therapeutic intervention.
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Affiliation(s)
- Peter Holzer
- Research Unit of Translational Neurogastroenterology, Institute of Experimental and Clinical Pharmacology, Medical University of Graz, Graz, Austria.,BioTechMed-Graz, Graz, Austria
| | - Aitak Farzi
- Research Unit of Translational Neurogastroenterology, Institute of Experimental and Clinical Pharmacology, Medical University of Graz, Graz, Austria
| | - Ahmed M Hassan
- Research Unit of Translational Neurogastroenterology, Institute of Experimental and Clinical Pharmacology, Medical University of Graz, Graz, Austria
| | - Geraldine Zenz
- Research Unit of Translational Neurogastroenterology, Institute of Experimental and Clinical Pharmacology, Medical University of Graz, Graz, Austria
| | - Angela Jačan
- CBmed GmbH-Center for Biomarker Research in Medicine, Graz, Austria
| | - Florian Reichmann
- Research Unit of Translational Neurogastroenterology, Institute of Experimental and Clinical Pharmacology, Medical University of Graz, Graz, Austria
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82
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Lipopolysaccharide enters the rat brain by a lipoprotein-mediated transport mechanism in physiological conditions. Sci Rep 2017; 7:13113. [PMID: 29030613 PMCID: PMC5640642 DOI: 10.1038/s41598-017-13302-6] [Citation(s) in RCA: 97] [Impact Index Per Article: 13.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2017] [Accepted: 09/22/2017] [Indexed: 01/19/2023] Open
Abstract
Physiologically, lipopolysaccharide (LPS) is present in the bloodstream and can be bound to several proteins for its transport (i.e.) LPS binding protein (LBP) and plasma lipoproteins). LPS receptors CD14 and TLR-4 are constitutively expressed in the Central Nervous System (CNS). To our knowledge, LPS infiltration in CNS has not been clearly demonstrated. A naturalistic experiment with healthy rats was performed to investigate whether LPS is present with its receptors in brain. Immunofluorescences showed that lipid A and core LPS were present in circumventricular organs, choroid plexus, meningeal cells, astrocytes, tanycytes and endothelial cells. Co-localization of LPS regions with CD14/TLR-4 was found. The role of lipoprotein receptors (SR-BI, ApoER2 and LDLr) in the brain as targets for a LPS transport mechanism by plasma apolipoproteins (i.e. ApoAI) was studied. Co-localization of LPS regions with these lipoproteins markers was observed. Our results suggest that LPS infiltrates in the brain in physiological conditions, possibly, through a lipoprotein transport mechanism, and it is bound to its receptors in blood-brain interfaces.
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83
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Oliveira J, Oliveira‐Maia AJ, Tamouza R, Brown AS, Leboyer M. Infectious and immunogenetic factors in bipolar disorder. Acta Psychiatr Scand 2017; 136:409-423. [PMID: 28832904 PMCID: PMC7159344 DOI: 10.1111/acps.12791] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 07/25/2017] [Indexed: 12/11/2022]
Abstract
OBJECTIVE Despite the evidence supporting the association between infection and bipolar disorder (BD), the genetic vulnerability that mediates its effects has yet to be clarified. A genetic origin for the immune imbalance observed in BD, possibly involved in the mechanisms of pathogen escape, has, however, been suggested in recent studies. METHOD Here, we present a critical review based on a systematic literature search of articles published until December 2016 on the association between BD and infectious/immunogenetic factors. RESULTS We provide evidence suggesting that infectious insults could act as triggers of maladaptive immune responses in BD and that immunogenetic vulnerability may amplify the effects of such environmental risk factors, increasing susceptibility to subsequent environmental encounters. Quality of evidence was generally impaired by scarce attempt of replication, small sample sizes and lack of high-quality environmental measures. CONCLUSION Infection has emerged as a potential preventable cause of morbidity in BD, urging the need to better investigate components of the host-pathogen interaction in patients and at-risk subjects, and thus opening the way to novel therapeutic opportunities.
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Affiliation(s)
- J. Oliveira
- Champalimaud Clinical CentreChampalimaud Centre for the UnknownLisboaPortugal,Centro Hospitalar Psiquiátrico de LisboaLisboaPortugal
| | - A. J. Oliveira‐Maia
- Champalimaud Clinical CentreChampalimaud Centre for the UnknownLisboaPortugal,Department of Psychiatry and Mental HealthCentro Hospitalar de Lisboa OcidentalLisboaPortugal,Champalimaud ResearchChampalimaud Centre for the UnknownLisboaPortugal,Faculdade de Ciências MédicasNOVA Medical SchoolUniversidade Nova de LisboaLisboaPortugal
| | - R. Tamouza
- Hôpital Saint LouisINSERM U1160Université Paris DiderotParisFrance,Fondation FondamentalCréteilFrance
| | - A. S. Brown
- Columbia University Medical CenterNew YorkNYUSA
| | - M. Leboyer
- Fondation FondamentalCréteilFrance,Department of PsychiatryAP‐HP, DHU PePSYHôpital Henri MondorUniversité Paris‐Est‐CréteilCréteilFrance,Translational PsychiatryINSERM U955CréteilFrance
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84
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Kaur K, Gill JS, Bansal PK, Deshmukh R. Neuroinflammation - A major cause for striatal dopaminergic degeneration in Parkinson's disease. J Neurol Sci 2017; 381:308-314. [DOI: 10.1016/j.jns.2017.08.3251] [Citation(s) in RCA: 65] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2016] [Revised: 07/25/2017] [Accepted: 08/23/2017] [Indexed: 12/14/2022]
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85
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Kvichansky AA, Volobueva MN, Manolova AO, Bolshakov AP, Gulyaeva NV. Neonatal proinflammatory stress alters the expression of genes of corticosteroid receptors in the rat hippocampus: Septo-temporal differences. NEUROCHEM J+ 2017. [DOI: 10.1134/s1819712417030059] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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86
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Abstract
PURPOSE OF REVIEW According to the WHO reports, around 350 million people worldwide suffer from depression. Despite its high prevalence, the complex interaction of multiple mechanisms underlying depression still needs to be elucidated. RECENT FINDINGS Over the course of the last few years, several neurobiological alterations have been linked to the development and maintenance of depression. One basic process that seems to link many of these findings is inflammation. Chronic inflammation has been associated with both biological factors such as excessive neurotransmitter concentrations as well as psychological processes such as adult stress reactivity and a history of childhood trauma. As a balanced microbial community, modulated by diet, is a key regulator of the host physiology, it seems likely that gut microbiota plays a role in depression. SUMMARY The review summarizes the existent literature on this emerging research field and provides a comprehensive overview of the multifaceted links between the microbiota, diet, and depression. Several pathways linking early life trauma, pharmacological treatment effects, and nutrition to the microbiome in depression are described aiming to foster the psychotherapeutic treatment of depressed patients by interventions targeting the microbiota.
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87
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de Melo LGP, Nunes SOV, Anderson G, Vargas HO, Barbosa DS, Galecki P, Carvalho AF, Maes M. Shared metabolic and immune-inflammatory, oxidative and nitrosative stress pathways in the metabolic syndrome and mood disorders. Prog Neuropsychopharmacol Biol Psychiatry 2017; 78:34-50. [PMID: 28438472 DOI: 10.1016/j.pnpbp.2017.04.027] [Citation(s) in RCA: 107] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/27/2017] [Revised: 03/27/2017] [Accepted: 04/08/2017] [Indexed: 02/08/2023]
Abstract
This review examines the shared immune-inflammatory, oxidative and nitrosative stress (IO&NS) and metabolic pathways underpinning metabolic syndrome (MetS), bipolar disorder (BD) and major depressive disorder (MDD). Shared pathways in both MetS and mood disorders are low grade inflammation, including increased levels of pro-inflammatory cytokines and acute phase proteins, increased lipid peroxidation with formation of malondialdehyde and oxidized low density lipoprotein cholesterol (LDL-c), hypernitrosylation, lowered levels of antioxidants, most importantly zinc and paraoxonase (PON1), increased bacterial translocation (leaky gut), increased atherogenic index of plasma and Castelli risk indices; and reduced levels of high-density lipoprotein (HDL-c) cholesterol. Insulin resistance is probably not a major factor associated with mood disorders. Given the high levels of IO&NS and metabolic dysregulation in BD and MDD and the high comorbidity with the atherogenic components of the MetS, mood disorders should be viewed as systemic neuro-IO&NS-metabolic disorders. The IO&NS-metabolic biomarkers may have prognostic value and may contribute to the development of novel treatments targeting neuro-immune, neuro-oxidative and neuro-nitrosative pathways.
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Affiliation(s)
- Luiz Gustavo Piccoli de Melo
- Department of Clinical Medicine, Londrina State University (UEL), Health Sciences Centre, Londrina, Paraná, Brazil; Center of Approach and Treatment for Smokers, University Hospital, Londrina State University, University Campus, Londrina, Paraná, Brazil; Health Sciences Graduation Program, Health Sciences Center, State University of Londrina, Londrina, Paraná, Brazil
| | - Sandra Odebrecht Vargas Nunes
- Department of Clinical Medicine, Londrina State University (UEL), Health Sciences Centre, Londrina, Paraná, Brazil; Center of Approach and Treatment for Smokers, University Hospital, Londrina State University, University Campus, Londrina, Paraná, Brazil; Health Sciences Graduation Program, Health Sciences Center, State University of Londrina, Londrina, Paraná, Brazil
| | | | - Heber Odebrecht Vargas
- Department of Clinical Medicine, Londrina State University (UEL), Health Sciences Centre, Londrina, Paraná, Brazil; Center of Approach and Treatment for Smokers, University Hospital, Londrina State University, University Campus, Londrina, Paraná, Brazil; Health Sciences Graduation Program, Health Sciences Center, State University of Londrina, Londrina, Paraná, Brazil
| | - Décio Sabbattini Barbosa
- Health Sciences Graduation Program, Health Sciences Center, State University of Londrina, Londrina, Paraná, Brazil; Department of Clinical and Toxicological Analysis, State University of Londrina, Londrina, Paraná, Brazil
| | - Piotr Galecki
- Department of Adult Psychiatry, University of Lodz, Lodz, Poland
| | - André F Carvalho
- Department of Clinical Medicine and Translational Psychiatry Research Group, Faculty of Medicine, Federal University of Ceará, Fortaleza, CE, Brazil
| | - Michael Maes
- Health Sciences Graduation Program, Health Sciences Center, State University of Londrina, Londrina, Paraná, Brazil; Department of Psychiatry, Chulalongkorn University, Bangkok, Thailand; Department of Psychiatry, Plovdiv University, Plovdiv, Bulgaria; Revitalis, Waalre, The Netherlands; Impact Strategic Research Center, Deakin University, Geelong, Australia.
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88
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Bilbo SD, Block CL, Bolton JL, Hanamsagar R, Tran PK. Beyond infection - Maternal immune activation by environmental factors, microglial development, and relevance for autism spectrum disorders. Exp Neurol 2017; 299:241-251. [PMID: 28698032 DOI: 10.1016/j.expneurol.2017.07.002] [Citation(s) in RCA: 196] [Impact Index Per Article: 28.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2017] [Revised: 06/26/2017] [Accepted: 07/05/2017] [Indexed: 12/17/2022]
Abstract
Immune molecules such as cytokines and chemokines and the cells that produce them within the brain, notably microglia, are critical for normal brain development. This recognition has in recent years led to the working hypothesis that inflammatory events during pregnancy, e.g. in response to infection, may disrupt the normal expression of immune molecules during critical stages of neural development and thereby contribute to the risk for neurodevelopmental disorders such as autism spectrum disorder (ASD). This hypothesis has in large part been shepherded by the work of Dr. Paul Patterson and colleagues, which has elegantly demonstrated that a single viral infection or injection of a viral mimetic to pregnant mice significantly and persistently impacts offspring immune and nervous system function, changes that underlie ASD-like behavioral dysfunction including social and communication deficits. Subsequent studies by many labs - in humans and in non-human animal models - have supported the hypothesis that ongoing disrupted immune molecule expression and/or neuroinflammation contributes to at least a significant subset of ASD. The heterogeneous clinical and biological phenotypes observed in ASD strongly suggest that in genetically susceptible individuals, environmental risk factors combine or synergize to create a tipping or threshold point for dysfunction. Importantly, animal studies showing a link between maternal immune activation (MIA) and ASD-like outcomes in offspring involve different species and diverse environmental factors associated with ASD in humans, beyond infection, including toxin exposures, maternal stress, and maternal obesity, all of which impact inflammatory or immune pathways. The goal of this review is to highlight the broader implications of Dr. Patterson's work for the field of autism, with a focus on the impact that MIA by diverse environmental factors has on fetal brain development, immune system development, and the pathophysiology of ASD.
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Affiliation(s)
- Staci D Bilbo
- Pediatrics and Neuroscience, Harvard Medical School, Lurie Center for Autism, Massachusetts General Hospital for Children, Boston, MA 02126, United States.
| | - Carina L Block
- Psychology and Neuroscience, Duke University, Durham, NC 27708, United States
| | - Jessica L Bolton
- Pediatrics and Anatomy/Neurobiology, University of California-Irvine, Irvine, CA 92697, United States
| | - Richa Hanamsagar
- Pediatrics and Neuroscience, Harvard Medical School, Lurie Center for Autism, Massachusetts General Hospital for Children, Boston, MA 02126, United States
| | - Phuong K Tran
- Pediatrics and Neuroscience, Harvard Medical School, Lurie Center for Autism, Massachusetts General Hospital for Children, Boston, MA 02126, United States
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89
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Steullet P, Cabungcal JH, Coyle J, Didriksen M, Gill K, Grace AA, Hensch TK, LaMantia AS, Lindemann L, Maynard TM, Meyer U, Morishita H, O'Donnell P, Puhl M, Cuenod M, Do KQ. Oxidative stress-driven parvalbumin interneuron impairment as a common mechanism in models of schizophrenia. Mol Psychiatry 2017; 22:936-943. [PMID: 28322275 PMCID: PMC5491690 DOI: 10.1038/mp.2017.47] [Citation(s) in RCA: 234] [Impact Index Per Article: 33.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/03/2016] [Revised: 12/21/2016] [Accepted: 01/17/2017] [Indexed: 02/08/2023]
Abstract
Parvalbumin inhibitory interneurons (PVIs) are crucial for maintaining proper excitatory/inhibitory balance and high-frequency neuronal synchronization. Their activity supports critical developmental trajectories, sensory and cognitive processing, and social behavior. Despite heterogeneity in the etiology across schizophrenia and autism spectrum disorder, PVI circuits are altered in these psychiatric disorders. Identifying mechanism(s) underlying PVI deficits is essential to establish treatments targeting in particular cognition. On the basis of published and new data, we propose oxidative stress as a common pathological mechanism leading to PVI impairment in schizophrenia and some forms of autism. A series of animal models carrying genetic and/or environmental risks relevant to diverse etiological aspects of these disorders show PVI deficits to be all accompanied by oxidative stress in the anterior cingulate cortex. Specifically, oxidative stress is negatively correlated with the integrity of PVIs and the extracellular perineuronal net enwrapping these interneurons. Oxidative stress may result from dysregulation of systems typically affected in schizophrenia, including glutamatergic, dopaminergic, immune and antioxidant signaling. As convergent end point, redox dysregulation has successfully been targeted to protect PVIs with antioxidants/redox regulators across several animal models. This opens up new perspectives for the use of antioxidant treatments to be applied to at-risk individuals, in close temporal proximity to environmental impacts known to induce oxidative stress.
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Affiliation(s)
- P Steullet
- Centre for Psychiatric Neuroscience, Department of Psychiatry, Lausanne University Hospital, Prilly-Lausanne, Switzerland
| | - J-H Cabungcal
- Centre for Psychiatric Neuroscience, Department of Psychiatry, Lausanne University Hospital, Prilly-Lausanne, Switzerland
| | - J Coyle
- Laboratory for Psychiatric and Molecular Neuroscience, Harvard Medical School, McLean Hospital, Belmont, MA, USA
| | - M Didriksen
- Synaptic transmission H. Lundbeck A/S, Valby, Denmark
| | - K Gill
- Departments of Neuroscience, Psychiatry and Psychology, University of Pittsburgh, Pittsburgh, PA, USA
| | - A A Grace
- Departments of Neuroscience, Psychiatry and Psychology, University of Pittsburgh, Pittsburgh, PA, USA
| | - T K Hensch
- Center for Brain Science, Department of Molecular Cellular Biology, Harvard University, Cambridge, MA USA,FM Kirby Neurobiology Center, Department of Neurology, Boston Children’s Hospital, Harvard Medical School, Boston, MA, USA
| | - A-S LaMantia
- George Washington Institute for Neuroscience, The George Washington University, Washington, DC, USA
| | - L Lindemann
- F. Hoffmann-La Roche, Roche Pharmaceutical and Early Development, Neuroscience, Opthalmology & Rare Disease (NORD) DTA, Discovery Neuroscience, Roche Innovation Center Basel, Basel, Switzerland
| | - T M Maynard
- George Washington Institute for Neuroscience, The George Washington University, Washington, DC, USA
| | - U Meyer
- Institute of Pharmacology and Toxicology, University of Zurich-Vetsuisse, Zurich, Switzerland
| | - H Morishita
- Center for Brain Science, Department of Molecular Cellular Biology, Harvard University, Cambridge, MA USA,FM Kirby Neurobiology Center, Department of Neurology, Boston Children’s Hospital, Harvard Medical School, Boston, MA, USA,Department of Psychiatry, Neuroscience, and Ophthalmology, Friedman Brain Institute, Mindich Child Health and Development Institute, Icahn School of Medicine at Mount Sinai, NY, USA
| | - P O'Donnell
- Neuroscience and Pain Research Unit, BioTherapeutics Research and Development, Pfizer, Cambridge, MA, USA
| | - M Puhl
- Laboratory for Psychiatric and Molecular Neuroscience, Harvard Medical School, McLean Hospital, Belmont, MA, USA
| | - M Cuenod
- Centre for Psychiatric Neuroscience, Department of Psychiatry, Lausanne University Hospital, Prilly-Lausanne, Switzerland
| | - K Q Do
- Centre for Psychiatric Neuroscience, Department of Psychiatry, Lausanne University Hospital, Prilly-Lausanne, Switzerland,Center for Psychiatric Neuroscience, Department of Psychiatry, Lausanne University Hospital, Prilly-Lausanne CH-1008, Switzerland. E-mail:
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90
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Rahimifard M, Maqbool F, Moeini-Nodeh S, Niaz K, Abdollahi M, Braidy N, Nabavi SM, Nabavi SF. Targeting the TLR4 signaling pathway by polyphenols: A novel therapeutic strategy for neuroinflammation. Ageing Res Rev 2017; 36:11-19. [PMID: 28235660 DOI: 10.1016/j.arr.2017.02.004] [Citation(s) in RCA: 307] [Impact Index Per Article: 43.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2016] [Revised: 02/11/2017] [Accepted: 02/16/2017] [Indexed: 01/08/2023]
Abstract
A wide array of cell signaling mediators and their interactions play vital roles in neuroinflammation associated with ischemia, brain trauma, developmental disorders and age-related neurodegeneration. Along with neurons, microglia and astrocytes are also affected by the inflammatory cascade by releasing pro-inflammatory cytokines, chemokines and reactive oxygen species. The release of pro-inflammatory mediators in response to neural dysfunction may be helpful, neutral or even deleterious to normal cellular survival. Moreover, the important role of NF-κB factors in the central nervous system (CNS) through toll-like receptor (TLR) activation has been well established. This review demonstrates recent findings regarding therapeutic aspects of polyphenolic compounds for the treatment of neuroinflammation, with the aim of regulating TLR4. Polyphenols including flavonoids, phenolic acids, phenolic alcohols, stilbenes and lignans, can target TLR4 signaling pathways in multiple ways. Toll interacting protein expression could be modulated by epigallocatechin-3-gallate. Resveratrol may also exert neuroprotective effects via the TLR4/NF-κB/STAT signaling cascade. Its role in activation of cascade via interfering with TLR4 oligomerization upon receptor stimulation has also been reported. Curcumin, another polyphenol, can suppress overexpression of inflammatory mediators via inhibiting the TLR4-MAPK/NF-κB pathway. It can also reduce neuronal apoptosis via a mechanism concerning the TLR4/MyD88/NF-κB signaling pathway in microglia/macrophages. Despite a symphony of in vivo and in vitro studies, many molecular and pharmacological aspects of neuroinflammation remain unclear. It is proposed that natural compounds targeting TLR4 may serve as important pharmacophores for the development of potent drugs for the treatment of neurological disorders.
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91
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Bekhbat M, Rowson SA, Neigh GN. Checks and balances: The glucocorticoid receptor and NFĸB in good times and bad. Front Neuroendocrinol 2017; 46:15-31. [PMID: 28502781 PMCID: PMC5523465 DOI: 10.1016/j.yfrne.2017.05.001] [Citation(s) in RCA: 79] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/16/2017] [Revised: 04/21/2017] [Accepted: 05/09/2017] [Indexed: 01/23/2023]
Abstract
Mutual regulation and balance between the endocrine and immune systems facilitate an organism's stress response and are impaired following chronic stress or prolonged immune activation. Concurrent alterations in stress physiology and immunity are increasingly recognized as contributing factors to several stress-linked neuropsychiatric disorders including depression, anxiety, and post-traumatic stress disorder. Accumulating evidence suggests that impaired balance and crosstalk between the glucocorticoid receptor (GR) and nuclear factor kappa-light-chain-enhancer of activated B cells (NFκB) - effectors of the stress and immune axes, respectively - may play a key role in mediating the harmful effects of chronic stress on mood and behavior. Here, we first review the molecular mechanisms of GR and NFκB interactions in health, then describe potential shifts in the GR-NFκB dynamics in chronic stress conditions within the context of brain circuitry relevant to neuropsychiatric diseases. Furthermore, we discuss developmental influences and sex differences in the regulation of these two transcription factors.
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Affiliation(s)
- Mandakh Bekhbat
- Emory University, Graduate Division of Biological Sciences, Neuroscience Graduate Program, United States
| | - Sydney A Rowson
- Emory University, Graduate Division of Biological Sciences, Molecular and Systems Pharmacology Graduate Studies Program, United States
| | - Gretchen N Neigh
- Virginia Commonwealth University, Department of Anatomy & Neurobiology, United States.
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92
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Crews FT, Walter TJ, Coleman LG, Vetreno RP. Toll-like receptor signaling and stages of addiction. Psychopharmacology (Berl) 2017; 234:1483-1498. [PMID: 28210782 PMCID: PMC5420377 DOI: 10.1007/s00213-017-4560-6] [Citation(s) in RCA: 103] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/19/2016] [Accepted: 02/03/2017] [Indexed: 02/07/2023]
Abstract
BACKGROUND Athina Markou and her colleagues discovered persistent changes in adult behavior following adolescent exposure to ethanol or nicotine consistent with increased risk for developing addiction. Building on Dr. Markou's important work and that of others in the field, researchers at the Bowles Center for Alcohol Studies have found that persistent changes in behavior following adolescent stress or alcohol exposure may be linked to induction of immune signaling in brain. AIM This study aims to illuminate the critical interrelationship of the innate immune system (e.g., toll-like receptors [TLRs], high-mobility group box 1 [HMGB1]) in the neurobiology of addiction. METHOD This study reviews the relevant research regarding the relationship between the innate immune system and addiction. CONCLUSION Emerging evidence indicates that TLRs in brain, particularly those on microglia, respond to endogenous innate immune agonists such as HMGB1 and microRNAs (miRNAs). Multiple TLRs, HMGB1, and miRNAs are induced in the brain by stress, alcohol, and other drugs of abuse and are increased in the postmortem human alcoholic brain. Enhanced TLR-innate immune signaling in brain leads to epigenetic modifications, alterations in synaptic plasticity, and loss of neuronal cell populations, which contribute to cognitive and emotive dysfunctions. Addiction involves progressive stages of drug binges and intoxication, withdrawal-negative affect, and ultimately compulsive drug use and abuse. Toll-like receptor signaling within cortical-limbic circuits is modified by alcohol and stress in a manner consistent with promoting progression through the stages of addiction.
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Affiliation(s)
- Fulton T Crews
- Bowles Center for Alcohol Studies, School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA.
| | - T Jordan Walter
- Bowles Center for Alcohol Studies, School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA
| | - Leon G Coleman
- Bowles Center for Alcohol Studies, School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA
| | - Ryan P Vetreno
- Bowles Center for Alcohol Studies, School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA
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93
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Warden AS, Mayfield RD. Gene expression profiling in the human alcoholic brain. Neuropharmacology 2017; 122:161-174. [PMID: 28254370 DOI: 10.1016/j.neuropharm.2017.02.017] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2016] [Revised: 02/13/2017] [Accepted: 02/17/2017] [Indexed: 01/12/2023]
Abstract
Long-term alcohol use causes widespread changes in gene expression in the human brain. Aberrant gene expression changes likely contribute to the progression from occasional alcohol use to alcohol use disorder (including alcohol dependence). Transcriptome studies have identified individual gene candidates that are linked to alcohol-dependence phenotypes. The use of bioinformatics techniques to examine expression datasets has provided novel systems-level approaches to transcriptome profiling in human postmortem brain. These analytical advances, along with recent developments in next-generation sequencing technology, have been instrumental in detecting both known and novel coding and non-coding RNAs, alternative splicing events, and cell-type specific changes that may contribute to alcohol-related pathologies. This review offers an integrated perspective on alcohol-responsive transcriptional changes in the human brain underlying the regulatory gene networks that contribute to alcohol dependence. This article is part of the Special Issue entitled "Alcoholism".
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Affiliation(s)
- Anna S Warden
- Institute for Neuroscience, The University of Texas at Austin, 1 University Station, C7000, Austin, TX 78712, USA; Waggoner Center for Alcohol and Addiction Research, The University of Texas at Austin, 2500 Speedway, A4800, Austin, TX 78712, USA
| | - R Dayne Mayfield
- Waggoner Center for Alcohol and Addiction Research, The University of Texas at Austin, 2500 Speedway, A4800, Austin, TX 78712, USA.
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94
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The Effectiveness of Mindfulness-Integrated Cognitive Behavior Therapy on Depression, Anxiety, and Stress in Females with Multiple Sclerosis: A Single Blind Randomized Controlled Trial. IRANIAN RED CRESCENT MEDICAL JOURNAL 2017. [DOI: 10.5812/ircmj.44566] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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95
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Psychosocial stress on neuroinflammation and cognitive dysfunctions in Alzheimer's disease: the emerging role for microglia? Neurosci Biobehav Rev 2017; 77:148-164. [PMID: 28185874 DOI: 10.1016/j.neubiorev.2017.01.046] [Citation(s) in RCA: 80] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2016] [Revised: 01/20/2017] [Accepted: 01/31/2017] [Indexed: 01/22/2023]
Abstract
Chronic psychosocial stress is increasingly recognized as a risk factor for late-onset Alzheimer's disease (LOAD) and associated cognitive deficits. Chronic stress also primes microglia and induces inflammatory responses in the adult brain, thereby compromising synapse-supportive roles of microglia and deteriorating cognitive functions during aging. Substantial evidence demonstrates that failure of microglia to clear abnormally accumulating amyloid-beta (Aβ) peptide contributes to neuroinflammation and neurodegeneration in AD. Moreover, genome-wide association studies have linked variants in several immune genes, such as TREM2 and CD33, the expression of which in the brain is restricted to microglia, with cognitive dysfunctions in LOAD. Thus, inflammation-promoting chronic stress may create a vicious cycle of aggravated microglial dysfunction accompanied by increased Aβ accumulation, collectively exacerbating neurodegeneration. Surprisingly, however, little is known about whether and how chronic stress contributes to microglia-mediated neuroinflammation that may underlie cognitive impairments in AD. This review aims to summarize the currently available clinical and preclinical data and outline potential molecular mechanisms linking stress, microglia and neurodegeneration, to foster future research in this field.
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96
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The role of neuroimmune signaling in alcoholism. Neuropharmacology 2017; 122:56-73. [PMID: 28159648 DOI: 10.1016/j.neuropharm.2017.01.031] [Citation(s) in RCA: 201] [Impact Index Per Article: 28.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2016] [Revised: 01/24/2017] [Accepted: 01/29/2017] [Indexed: 02/07/2023]
Abstract
Alcohol consumption and stress increase brain levels of known innate immune signaling molecules. Microglia, the innate immune cells of the brain, and neurons respond to alcohol, signaling through Toll-like receptors (TLRs), high-mobility group box 1 (HMGB1), miRNAs, pro-inflammatory cytokines and their associated receptors involved in signaling between microglia, other glia and neurons. Repeated cycles of alcohol and stress cause a progressive, persistent induction of HMGB1, miRNA and TLR receptors in brain that appear to underlie the progressive and persistent loss of behavioral control, increased impulsivity and anxiety, as well as craving, coupled with increasing ventral striatal responses that promote reward seeking behavior and increase risk of developing alcohol use disorders. Studies employing anti-oxidant, anti-inflammatory, anti-depressant, and innate immune antagonists further link innate immune gene expression to addiction-like behaviors. Innate immune molecules are novel targets for addiction and affective disorders therapies. This article is part of the Special Issue entitled "Alcoholism".
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97
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MacDowell KS, Caso JR, Martín-Hernández D, Moreno BM, Madrigal JLM, Micó JA, Leza JC, García-Bueno B. The Atypical Antipsychotic Paliperidone Regulates Endogenous Antioxidant/Anti-Inflammatory Pathways in Rat Models of Acute and Chronic Restraint Stress. Neurotherapeutics 2016; 13:833-843. [PMID: 27233514 PMCID: PMC5081131 DOI: 10.1007/s13311-016-0438-2] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Alterations in the innate inflammatory response may underlie the pathophysiology of psychiatric diseases. Current antipsychotics modulate pro-/anti-inflammatory pathways, but their specific actions on these pathways remain only partly explored. This study was conducted to elucidate the regulatory role of paliperidone (1 mg/kg i.p.) on acute (6 h) and chronic (6 h/day for 21 consecutive days) restraint stress-induced alterations in 2 emerging endogenous anti-inflammatory/antioxidant mechanisms: nuclear factor erythroid-related factor 2 (NRF2)/antioxidant enzymes pathway, and the cytokine milieu regulating M1/M2 polarization in microglia, analyzed at the mRNA and protein levels in prefrontal cortex samples. In acute stress conditions, paliperidone enhanced NRF2 levels, possibly related to phosphoinositide 3-kinase upregulation and reduced kelch-Like ECH-associated protein 1 expression. In chronic conditions, paliperidone tended to normalize NRF2 levels through a phosphoinositide 3-kinase related-mechanism, with no effects on kelch-Like ECH-associated protein 1. Antioxidant response element-dependent antioxidant enzymes were upregulated by paliperidone in acute stress, while in chronic stress, paliperidone tended to prevent stress-induced downregulation of the endogenous antioxidant machinery. However, paliperidone increased transforming growth factor-β and interleukin-10 in favor of an M2 microglia profile in acute stress conditions, which was also corroborated by paliperidone-induced increased levels of the M2 cellular markers arginase I and folate receptor 2. This latter effect was also produced in chronic conditions. Immunofluorescence studies suggested an increase in the number of microglial cells expressing arginase I and folate receptor 2 in the stressed animals pretreated with paliperidone. In conclusion, the enhancement of endogenous antioxidant/anti-inflammatory pathways by current and new antipsychotics could represent an interesting therapeutic strategy for the future.
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Affiliation(s)
- Karina S MacDowell
- Department of Pharmacology, Faculty of Medicine, University Complutense, 28040, Madrid, Spain
- Centro de Investigación Biomédica en Salud Mental (CIBERSAM), Madrid, Spain
- Instituto de Investigación Sanitaria Hospital 12 de Octubre and Instituto Universitario de Investigación en Neuroquímica UCM, Madrid, Spain
| | - Javier R Caso
- Department of Pharmacology, Faculty of Medicine, University Complutense, 28040, Madrid, Spain
- Centro de Investigación Biomédica en Salud Mental (CIBERSAM), Madrid, Spain
- Instituto de Investigación Sanitaria Hospital 12 de Octubre and Instituto Universitario de Investigación en Neuroquímica UCM, Madrid, Spain
- Department of Psychiatry, Faculty of Medicine, University Complutense, 28040, Madrid, Spain
| | - David Martín-Hernández
- Department of Pharmacology, Faculty of Medicine, University Complutense, 28040, Madrid, Spain
- Centro de Investigación Biomédica en Salud Mental (CIBERSAM), Madrid, Spain
- Instituto de Investigación Sanitaria Hospital 12 de Octubre and Instituto Universitario de Investigación en Neuroquímica UCM, Madrid, Spain
| | - Beatriz M Moreno
- Department of Pharmacology, Faculty of Medicine, University Complutense, 28040, Madrid, Spain
- Centro de Investigación Biomédica en Salud Mental (CIBERSAM), Madrid, Spain
- Instituto de Investigación Sanitaria Hospital 12 de Octubre and Instituto Universitario de Investigación en Neuroquímica UCM, Madrid, Spain
| | - José L M Madrigal
- Department of Pharmacology, Faculty of Medicine, University Complutense, 28040, Madrid, Spain
- Centro de Investigación Biomédica en Salud Mental (CIBERSAM), Madrid, Spain
- Instituto de Investigación Sanitaria Hospital 12 de Octubre and Instituto Universitario de Investigación en Neuroquímica UCM, Madrid, Spain
| | - Juan A Micó
- Centro de Investigación Biomédica en Salud Mental (CIBERSAM), Madrid, Spain
- Neuropsychopharmacology and Psychobiology Research Group, Department of Neuroscience, University of Cádiz, Cádiz, Spain
| | - Juan C Leza
- Department of Pharmacology, Faculty of Medicine, University Complutense, 28040, Madrid, Spain
- Centro de Investigación Biomédica en Salud Mental (CIBERSAM), Madrid, Spain
- Instituto de Investigación Sanitaria Hospital 12 de Octubre and Instituto Universitario de Investigación en Neuroquímica UCM, Madrid, Spain
| | - Borja García-Bueno
- Department of Pharmacology, Faculty of Medicine, University Complutense, 28040, Madrid, Spain.
- Centro de Investigación Biomédica en Salud Mental (CIBERSAM), Madrid, Spain.
- Instituto de Investigación Sanitaria Hospital 12 de Octubre and Instituto Universitario de Investigación en Neuroquímica UCM, Madrid, Spain.
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Campos AC, Rocha NP, Nicoli JR, Vieira LQ, Teixeira MM, Teixeira AL. Absence of gut microbiota influences lipopolysaccharide-induced behavioral changes in mice. Behav Brain Res 2016; 312:186-94. [DOI: 10.1016/j.bbr.2016.06.027] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2016] [Revised: 06/09/2016] [Accepted: 06/13/2016] [Indexed: 12/27/2022]
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Ebenezer PJ, Wilson CB, Wilson LD, Nair AR, J F. The Anti-Inflammatory Effects of Blueberries in an Animal Model of Post-Traumatic Stress Disorder (PTSD). PLoS One 2016; 11:e0160923. [PMID: 27603014 PMCID: PMC5014311 DOI: 10.1371/journal.pone.0160923] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2016] [Accepted: 07/27/2016] [Indexed: 12/21/2022] Open
Abstract
Post-traumatic stress disorder (PTSD) is a trauma and stressor-related disorder that results in a prolonged stress response. It is associated with increased oxidative stress and inflammation in the prefrontal cortex (PFC) and hippocampus (HC). The only approved therapy for PTSD is selective serotonin re-uptake inhibitors (SSRIs), but their efficacy is marginal. Recently, we demonstrated that over-production of norepinephrine (NE) as the possible reason for the lack of efficacy of SSRIs. Hence, there is a need for novel therapeutic approaches for the treatment of PTSD. In this study, we investigated the anti-inflammatory role of blueberries in modulating inflammatory markers and neurotransmitter levels in PTSD. Rats were fed either a blueberry enriched (2%) or a control diet. Rats were exposed to cats for one hour on days 1 and 11 of a 31-day schedule to simulate traumatic conditions. The rats were also subjected to psychosocial stress via daily cage cohort changes. At the end of the study, the rats were euthanized and the PFC and HC were isolated. Monoamines were measured by high-performance liquid chromatography. Reactive oxygen species (ROS), gene and protein expression levels of inflammatory cytokines were also measured. In our PTSD model, NE levels were increased and 5-HT levels were decreased when compared to control. In contrast, a blueberry enriched diet increased 5-HT without affecting NE levels. The rate limiting enzymes tyrosine hydroxylase and tryptophan hydroxylase were also studied and they confirmed our findings. The enhanced levels free radicals, gene and protein expression of inflammatory cytokines seen in the PTSD group were normalized with a blueberry enriched diet. Decreased anxiety in this group was shown by improved performance on the elevated plus-maze. These findings indicate blueberries can attenuate oxidative stress and inflammation and restore neurotransmitter imbalances in a rat model of PTSD.
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Affiliation(s)
- Philip J. Ebenezer
- Comparative Biomedical Sciences, School of Veterinary Medicine, Louisiana State University Baton Rouge, Louisiana, United States of America
| | - C. Brad Wilson
- Comparative Biomedical Sciences, School of Veterinary Medicine, Louisiana State University Baton Rouge, Louisiana, United States of America
| | - Leslie D. Wilson
- Pathobiological Sciences, School of Veterinary Medicine, Louisiana State University Baton Rouge, Louisiana, United States of America
| | - Anand R. Nair
- Comparative Biomedical Sciences, School of Veterinary Medicine, Louisiana State University Baton Rouge, Louisiana, United States of America
| | - Francis J
- Comparative Biomedical Sciences, School of Veterinary Medicine, Louisiana State University Baton Rouge, Louisiana, United States of America
- * E-mail:
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Severance EG, Yolken RH, Eaton WW. Autoimmune diseases, gastrointestinal disorders and the microbiome in schizophrenia: more than a gut feeling. Schizophr Res 2016; 176:23-35. [PMID: 25034760 PMCID: PMC4294997 DOI: 10.1016/j.schres.2014.06.027] [Citation(s) in RCA: 153] [Impact Index Per Article: 19.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/31/2014] [Revised: 06/17/2014] [Accepted: 06/19/2014] [Indexed: 12/12/2022]
Abstract
Autoimmunity, gastrointestinal (GI) disorders and schizophrenia have been associated with one another for a long time. This paper reviews these connections and provides a context by which multiple risk factors for schizophrenia may be related. Epidemiological studies strongly link schizophrenia with autoimmune disorders including enteropathic celiac disease. Exposure to wheat gluten and bovine milk casein also contribute to non-celiac food sensitivities in susceptible individuals. Co-morbid GI inflammation accompanies humoral immunity to food antigens, occurs early during the course of schizophrenia and appears to be independent from antipsychotic-generated motility effects. This inflammation impacts endothelial barrier permeability and can precipitate translocation of gut bacteria into systemic circulation. Infection by the neurotropic gut pathogen, Toxoplasma gondii, will elicit an inflammatory GI environment. Such processes trigger innate immunity, including activation of complement C1q, which also functions at synapses in the brain. The emerging field of microbiome research lies at the center of these interactions with evidence that the abundance and diversity of resident gut microbiota contribute to digestion, inflammation, gut permeability and behavior. Dietary modifications of core bacterial compositions may explain inefficient gluten digestion and how immigrant status in certain situations is a risk factor for schizophrenia. Gut microbiome research in schizophrenia is in its infancy, but data in related fields suggest disease-associated altered phylogenetic compositions. In summary, this review surveys associative and experimental data linking autoimmunity, GI activity and schizophrenia, and proposes that understanding of disrupted biological pathways outside of the brain can lend valuable information regarding pathogeneses of complex, polygenic brain disorders.
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Affiliation(s)
- Emily G. Severance
- Stanley Division of Developmental Neurovirology, Department of Pediatrics, Johns Hopkins University School of Medicine, 600 N. Wolfe Street, Blalock 1105, Baltimore, MD 21287-4933 U.S.A
| | - Robert H. Yolken
- Stanley Division of Developmental Neurovirology, Department of Pediatrics, Johns Hopkins University School of Medicine, 600 N. Wolfe Street, Blalock 1105, Baltimore, MD 21287-4933 U.S.A
| | - William W. Eaton
- Department of Mental Health, Bloomberg School of Public Health, The Johns Hopkins University, Baltimore, MD, U.S.A
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