1
|
Owona BA, Mary A, Messi AN, Ravichandran KA, Mbing JN, Pegnyemb E, Moundipa PF, Heneka MT. Biflavonoid Methylchamaejasmin and Khaya grandifoliola Extract Inhibit NLRP3 Inflammasome in THP-1 Cell Model of Neuroinflammation. Mol Neurobiol 2024:10.1007/s12035-024-04365-4. [PMID: 39012444 DOI: 10.1007/s12035-024-04365-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2024] [Accepted: 07/11/2024] [Indexed: 07/17/2024]
Abstract
Neuroinflammation is a common hallmark of Alzheimer's disease (AD), with NLRP3 inflammasome proven to be activated in microglia of AD patients' brains. In this study, a newly isolated biflavonoid (7,7'-di-O-methylchamaejasmin/M8) and a crude extract of the plant Khaya grandifoliola (KG) were investigated for their inhibitory effect on inflammasome activation. In preliminary experiments, M8 and KG showed no cytotoxicity on human macrophage-like differentiated THP-1 cells and exhibited anti-inflammatory inhibition of nitric oxide produced following lipopolysaccharide stimulation. Furthermore, M8 and KG blocked IL-1β and IL-18 production by reducing NLRP3 inflammasome components including NFκB, NLRP3, Caspase-1, pro-IL-1β, and pro-IL-18 at the mRNA and protein levels. Regarding the formation of ASC (apoptosis-associated speck-like protein containing a CARD) specks during inflammasome activation, the size and fluorescent intensity of the existing specks were unchanged across all treatment conditions. However, M8 and KG treatments were shown to prevent further speck formation. In addition, experiments on amyloid β phagocytosis showed that M8 and KG pretreatments can restore the phagocytic activity of THP-1 cells, which was impaired following inflammasome activation. Altogether, our findings describe for the first time a promising role of biflavonoids and KG extract in preventing inflammasome activation and protecting against neuroinflammation, a key factor in AD development.
Collapse
Affiliation(s)
- Brice Ayissi Owona
- Laboratory of Pharmacology and Toxicology, Department of Biochemistry, Faculty of Science, University of Yaoundé I, AEFAS, P.O. Box 812, Yaoundé, Cameroon.
- German Center for Neurodegenerative Diseases, Venusberg, Campus 1/Gebäude 99, 53127, Bonn, Germany.
| | - Arnaud Mary
- Luxembourg Centre for Systems Biomedicine, University of Luxembourg, 6 Avenue du Swing, 4367, Belvaux, Luxembourg
| | - Angelique N Messi
- Laboratory of Organic Chemistry, Faculty of Science, University of Yaoundé I, P.O. BOX 812, Yaoundé, Cameroon
| | | | - Josephine Ngo Mbing
- Laboratory of Organic Chemistry, Faculty of Science, University of Yaoundé I, P.O. BOX 812, Yaoundé, Cameroon
| | - Emmanuel Pegnyemb
- Laboratory of Organic Chemistry, Faculty of Science, University of Yaoundé I, P.O. BOX 812, Yaoundé, Cameroon
| | - Paul F Moundipa
- Laboratory of Pharmacology and Toxicology, Department of Biochemistry, Faculty of Science, University of Yaoundé I, AEFAS, P.O. Box 812, Yaoundé, Cameroon
| | - Michael T Heneka
- German Center for Neurodegenerative Diseases, Venusberg, Campus 1/Gebäude 99, 53127, Bonn, Germany.
- Institute of Physiology II, University Hospital Bonn, Nußallee 11, 53115, Bonn, Germany.
- Institute of Innate Immunity, University Hospital, Venusberg, Campus 1/Gebäude 12, 53127, Bonn, Germany.
- Luxembourg Centre for Systems Biomedicine, University of Luxembourg, 6 Avenue du Swing, 4367, Belvaux, Luxembourg.
- Infectious Diseases and Immunology, University of Massachusetts Chan Medical School, 55 Lake Avenue North Worcester, Worcester, MA, 01655, USA.
| |
Collapse
|
2
|
Gupta R, Advani D, Yadav D, Ambasta RK, Kumar P. Dissecting the Relationship Between Neuropsychiatric and Neurodegenerative Disorders. Mol Neurobiol 2023; 60:6476-6529. [PMID: 37458987 DOI: 10.1007/s12035-023-03502-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2023] [Accepted: 07/11/2023] [Indexed: 09/28/2023]
Abstract
Neurodegenerative diseases (NDDs) and neuropsychiatric disorders (NPDs) are two common causes of death in elderly people, which includes progressive neuronal cell death and behavioral changes. NDDs include Alzheimer's disease, Parkinson's disease, Huntington's disease, amyotrophic lateral sclerosis, multiple sclerosis, and motor neuron disease, characterized by cognitive defects and memory impairment, whereas NPDs include depression, seizures, migraine headaches, eating disorders, addictions, palsies, major depressive disorders, anxiety, and schizophrenia, characterized by behavioral changes. Mounting evidence demonstrated that NDDs and NPDs share an overlapping mechanism, which includes post-translational modifications, the microbiota-gut-brain axis, and signaling events. Mounting evidence demonstrated that various drug molecules, namely, natural compounds, repurposed drugs, multitarget directed ligands, and RNAs, have been potentially implemented as therapeutic agents against NDDs and NPDs. Herein, we highlighted the overlapping mechanism, the role of anxiety/stress-releasing factors, cytosol-to-nucleus signaling, and the microbiota-gut-brain axis in the pathophysiology of NDDs and NPDs. We summarize the therapeutic application of natural compounds, repurposed drugs, and multitarget-directed ligands as therapeutic agents. Lastly, we briefly described the application of RNA interferences as therapeutic agents in the pathogenesis of NDDs and NPDs. Neurodegenerative diseases and neuropsychiatric diseases both share a common signaling molecule and molecular phenomenon, namely, pro-inflammatory cytokines, γCaMKII and MAPK/ERK, chemokine receptors, BBB permeability, and the gut-microbiota-brain axis. Studies have demonstrated that any alterations in the signaling mentioned above molecules and molecular phenomena lead to the pathophysiology of neurodegenerative diseases, namely, Alzheimer's disease, Parkinson's disease, Huntington's disease, and amyotrophic lateral sclerosis, and neuropsychiatric disorders, such as bipolar disorder, schizophrenia, depression, anxiety, autism spectrum disorder, and post-traumatic stress disorder.
Collapse
Affiliation(s)
- Rohan Gupta
- Molecular Neuroscience and Functional Genomics Laboratory, Department of Biotechnology, Delhi Technological University, Shahbad Daulatpur, Bawana Road, New Delhi, Delhi, 110042, India
| | - Dia Advani
- Molecular Neuroscience and Functional Genomics Laboratory, Department of Biotechnology, Delhi Technological University, Shahbad Daulatpur, Bawana Road, New Delhi, Delhi, 110042, India
| | - Divya Yadav
- Molecular Neuroscience and Functional Genomics Laboratory, Department of Biotechnology, Delhi Technological University, Shahbad Daulatpur, Bawana Road, New Delhi, Delhi, 110042, India
| | - Rashmi K Ambasta
- Molecular Neuroscience and Functional Genomics Laboratory, Department of Biotechnology, Delhi Technological University, Shahbad Daulatpur, Bawana Road, New Delhi, Delhi, 110042, India
| | - Pravir Kumar
- Molecular Neuroscience and Functional Genomics Laboratory, Department of Biotechnology, Delhi Technological University, Shahbad Daulatpur, Bawana Road, New Delhi, Delhi, 110042, India.
| |
Collapse
|
3
|
Bai Y, Ren H, Bian L, Zhou Y, Wang X, Xiong Z, Liu Z, Han B, Yao H. Regulation of Glial Function by Noncoding RNA in Central Nervous System Disease. Neurosci Bull 2023; 39:440-452. [PMID: 36161582 PMCID: PMC10043107 DOI: 10.1007/s12264-022-00950-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2022] [Accepted: 06/29/2022] [Indexed: 11/24/2022] Open
Abstract
Non-coding RNAs (ncRNAs) are a class of functional RNAs that play critical roles in different diseases. NcRNAs include microRNAs, long ncRNAs, and circular RNAs. They are highly expressed in the brain and are involved in the regulation of physiological and pathophysiological processes of central nervous system (CNS) diseases. Mounting evidence indicates that ncRNAs play key roles in CNS diseases. Further elucidating the mechanisms of ncRNA underlying the process of regulating glial function that may lead to the identification of novel therapeutic targets for CNS diseases.
Collapse
Affiliation(s)
- Ying Bai
- Department of Pharmacology, Jiangsu Provincial Key Laboratory, School of Medicine, Southeast University, Nanjing, 210009, China
| | - Hui Ren
- Department of Pharmacology, Jiangsu Provincial Key Laboratory, School of Medicine, Southeast University, Nanjing, 210009, China
| | - Liang Bian
- Department of Pharmacology, Jiangsu Provincial Key Laboratory, School of Medicine, Southeast University, Nanjing, 210009, China
| | - You Zhou
- Department of Pharmacology, Jiangsu Provincial Key Laboratory, School of Medicine, Southeast University, Nanjing, 210009, China
| | - Xinping Wang
- Department of Pharmacology, Jiangsu Provincial Key Laboratory, School of Medicine, Southeast University, Nanjing, 210009, China
| | - Zhongli Xiong
- Department of Pharmacology, Jiangsu Provincial Key Laboratory, School of Medicine, Southeast University, Nanjing, 210009, China
| | - Ziqi Liu
- Department of Pharmacology, Jiangsu Provincial Key Laboratory, School of Medicine, Southeast University, Nanjing, 210009, China
| | - Bing Han
- Department of Pharmacology, Jiangsu Provincial Key Laboratory, School of Medicine, Southeast University, Nanjing, 210009, China
| | - Honghong Yao
- Department of Pharmacology, Jiangsu Provincial Key Laboratory, School of Medicine, Southeast University, Nanjing, 210009, China.
- Co-innovation Center of Neuroregeneration, Nantong University, Nantong, 226001, China.
- Institute of Life Sciences, Key Laboratory of Developmental Genes and Human Disease, Southeast University, Nanjing, 210009, China.
| |
Collapse
|
4
|
Long Noncoding RNA LINC00473 Ameliorates Depression-Like Behaviors in Female Mice by Acting as a Molecular Sponge to Regulate miR-497-5p/BDNF Axis. COMPUTATIONAL AND MATHEMATICAL METHODS IN MEDICINE 2022; 2022:4244425. [PMID: 36072768 PMCID: PMC9441382 DOI: 10.1155/2022/4244425] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/06/2022] [Revised: 07/28/2022] [Accepted: 08/08/2022] [Indexed: 11/18/2022]
Abstract
Background. Depression was a common life-threatening psychiatric disorder and occurs more frequently in women than in men. Long noncoding RNAs (lncRNAs), such as LINC00473, had been reported to be involved in the progression of depression. Methods. Chronic unpredictable moderate stress in mice (CUMS) was applied to construct a depression model. Subsequently, RT-qPCR was applied to check the level of LINC00473 and microRNA-497-5p (miR-497-5p) in the hippocampal region of the mice induced by CUMS. CUMS mice were injected with lentiviral vectors of LINC00473 (LV-LINC00473), miR-497-5p inhibitor, short hairpin- (sh-) brain-derived neurotrophic factor (sh-BDNF), or miR-497-5p mimic to evaluate depressive behaviors, including sucrose preference test, forced swim test, elevated plus maze, and tail suspension test. Moreover, the production of hypothalamic neurotransmitters was assessed with the usage of ELISA kits. Dual-luciferase reporter assay, RNA pull-down, and RIP analysis were performed to measure the relationship between miR-497-5p and LINC00473 or BDNF. Further, western blot was employed to determine the protein level of BDNF. Results. We discovered that LINC00473 level was downregulated in the female mice with depression, but not in male mice. Besides, the depressive behaviors induced by CUMS in mice, including the decrease of sucrose preference and time in open arm, as well as the increase of immobility time and swimming resting time were all ameliorated by LINC00473 overexpression. Moreover, the concentration of neurotransmitters was decreased in CUMS-induced mouse hypothalamus, which was blocked by LV-LINC00473 lentiviral vector administration. Mechanistically, LINC00473 directly targeted miR-497-5p. Absence of miR-497-5p revealed the antidepression effects on CUMS-induced mice, and miR-497-5p upregulation could counter the antidepressive impacts of LINC00473 upregulation on CUMS-induced mice. Furthermore, LINC00473 could target miR-497-5p to modulate BDNF level. Knockdown of BDNF could abrogate the improving influences of miR-497-5p suppression on CUMS-induced depression. Conclusions. LINC00473 ameliorated CUMS-caused depression by encouraging BDNF expression via binding to miR-497-5p, which might provide a potential therapeutic target for depression in females.
Collapse
|
5
|
Ornitz DM, Itoh N. New developments in the biology of fibroblast growth factors. WIREs Mech Dis 2022; 14:e1549. [PMID: 35142107 PMCID: PMC10115509 DOI: 10.1002/wsbm.1549] [Citation(s) in RCA: 44] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2021] [Revised: 11/08/2021] [Accepted: 11/09/2021] [Indexed: 01/28/2023]
Abstract
The fibroblast growth factor (FGF) family is composed of 18 secreted signaling proteins consisting of canonical FGFs and endocrine FGFs that activate four receptor tyrosine kinases (FGFRs 1-4) and four intracellular proteins (intracellular FGFs or iFGFs) that primarily function to regulate the activity of voltage-gated sodium channels and other molecules. The canonical FGFs, endocrine FGFs, and iFGFs have been reviewed extensively by us and others. In this review, we briefly summarize past reviews and then focus on new developments in the FGF field since our last review in 2015. Some of the highlights in the past 6 years include the use of optogenetic tools, viral vectors, and inducible transgenes to experimentally modulate FGF signaling, the clinical use of small molecule FGFR inhibitors, an expanded understanding of endocrine FGF signaling, functions for FGF signaling in stem cell pluripotency and differentiation, roles for FGF signaling in tissue homeostasis and regeneration, a continuing elaboration of mechanisms of FGF signaling in development, and an expanding appreciation of roles for FGF signaling in neuropsychiatric diseases. This article is categorized under: Cardiovascular Diseases > Molecular and Cellular Physiology Neurological Diseases > Molecular and Cellular Physiology Congenital Diseases > Stem Cells and Development Cancer > Stem Cells and Development.
Collapse
Affiliation(s)
- David M Ornitz
- Department of Developmental Biology, Washington University School of Medicine, St. Louis, Missouri, USA
| | - Nobuyuki Itoh
- Kyoto University Graduate School of Pharmaceutical Sciences, Sakyo, Kyoto, Japan
| |
Collapse
|
6
|
Gao YN, Zhang YQ, Wang H, Deng YL, Li NM. A New Player in Depression: MiRNAs as Modulators of Altered Synaptic Plasticity. Int J Mol Sci 2022; 23:ijms23094555. [PMID: 35562946 PMCID: PMC9101307 DOI: 10.3390/ijms23094555] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2022] [Revised: 04/15/2022] [Accepted: 04/18/2022] [Indexed: 01/04/2023] Open
Abstract
Depression is a psychiatric disorder that presents with a persistent depressed mood as the main clinical feature and is accompanied by cognitive impairment. Changes in neuroplasticity and neurogenesis greatly affect depression. Without genetic changes, epigenetic mechanisms have been shown to function by regulating gene expression during the body’s adaptation to stress. Studies in recent years have shown that as important regulatory factors in epigenetic mechanisms, microRNAs (miRNAs) play important roles in the development and progression of depression through the regulation of protein expression. Herein, we review the mechanisms of miRNA-mediated neuroplasticity in depression and discus synaptic structural plasticity, synaptic functional plasticity, and neurogenesis. Furthermore, we found that miRNAs regulate neuroplasticity through several signalling pathways to affect cognitive functions. However, these pathways do not work independently. Therefore, we try to identify synergistic correlations between miRNAs and multiple signalling pathways to broaden the potential pathogenesis of depression. In addition, in the future, dual-function miRNAs (protection/injury) are promising candidate biomarkers for the diagnosis of depression, and their regulated genes can potentially be used as target genes for the treatment of depression.
Collapse
Affiliation(s)
- Ya-Nan Gao
- School of Medical Technology, Beijing Institute of Technology, Beijing 100081, China; (Y.-N.G.); (H.W.)
| | - Yong-Qian Zhang
- School of Life Science, Beijing Institute of Technology, Beijing 100081, China; (Y.-Q.Z.); (Y.-L.D.)
| | - Hao Wang
- School of Medical Technology, Beijing Institute of Technology, Beijing 100081, China; (Y.-N.G.); (H.W.)
| | - Yu-Lin Deng
- School of Life Science, Beijing Institute of Technology, Beijing 100081, China; (Y.-Q.Z.); (Y.-L.D.)
| | - Nuo-Min Li
- School of Medical Technology, Beijing Institute of Technology, Beijing 100081, China; (Y.-N.G.); (H.W.)
- Correspondence:
| |
Collapse
|
7
|
CircDYM ameliorates CUMS mice depressive-like behavior and inhibits hippocampal neurons injury via miR-497a-5p/NR3C1 axis. Brain Res 2022; 1787:147911. [DOI: 10.1016/j.brainres.2022.147911] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2022] [Revised: 03/16/2022] [Accepted: 04/07/2022] [Indexed: 02/06/2023]
|
8
|
Huang X, Yang Q, Xie L, Lei S. Histone methyltransferase enhancer of zeste 2 polycomb repressive complex 2 subunit exacerbates inflammation in depression rats by modulating microglia polarization. Bioengineered 2022; 13:5509-5524. [PMID: 35172677 PMCID: PMC8973615 DOI: 10.1080/21655979.2022.2036892] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Abstract
Depression is a major cause of emotional agony and degraded living quality. Enhancer of zeste 2 polycomb repressive complex 2 subunit (EZH2) is involved in histone methylation in human diseases. This experiment was designed to investigate the mechanism of EZH2 on depression. Depression rat model was established via the treatment of chronic unpredictable mild stress (CUMS) to identify rat depression-like behaviors. EZH2 expression was determined and then silenced to assess its effect on depression-like behaviors and neuroinflammation. Microglia were isolated, cultured, identified and activated to assess EZH2 expression. Effect of EZH2 on microglia polarization was evaluated. Next, the binding relation between microRNA (miR)-29b-3p and EZH2 or matrix metallopeptidase 2 (MMP2) was analyzed. Levels of miR-29b-3p expression and MMP2 transcription were examined. Additionally, the role of miR-29b-3p in microglia polarization was tested. Depression-like behaviors were exhibited after CUMS induction. EZH2 was overexpressed in CUMS-treated rats and lipopolysaccharide (LPS)-induced microglia. EZH2 silencing reversed depression-like behaviors. EZH2 silencing mitigated inflammation in depression by manipulating microglia M2-type polarization. EZH2 targeted miR-29b-3p expression to promote MMP2 transcription. Inhibition of miR-29b-3p reversed the role of EZH2 silencing in microglia M2-type polarization and promoted inflammation. EZH2 inhibited miR-29b-3p expression by combining with miR-29b-3p promoter and trimethylation of histone H3-lysine 27-trimethylated upregulation, and then elevated MMP2 transcription and triggered microglia M1-type polarization, thus exacerbating depression-like behaviors and neuroinflammation of depression.
Collapse
Affiliation(s)
- Xuezhu Huang
- Mental Medicine, College of Wenzhou Medical University, Wenzhou, Zhejiang, China.,Department of Psychosomatic Medicine, Nanchong Central Hospital Affiliated with North Sichuan Medical College, Nanchong, Sichuan, China.,Department of Geriatrics, Kangning Hospital Affiliated with Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Qin Yang
- Department of Psychosomatic Medicine, Nanchong Central Hospital Affiliated with North Sichuan Medical College, Nanchong, Sichuan, China
| | - Lingling Xie
- Department of Geriatrics, Kangning Hospital Affiliated with Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Sihong Lei
- Department of Psychosomatic Medicine, Nanchong Central Hospital Affiliated with North Sichuan Medical College, Nanchong, Sichuan, China
| |
Collapse
|
9
|
Wang Y, Amdanee N, Zhang X. Exosomes in schizophrenia: Pathophysiological mechanisms, biomarkers, and therapeutic targets. Eur Psychiatry 2022; 65:e61. [PMID: 36082534 PMCID: PMC9532215 DOI: 10.1192/j.eurpsy.2022.2319] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
While schizophrenia (SCZ) is a devastating psychiatric disorder that detrimentally affects a significant portion of the worldwide population, its diagnosis is traditionally based on a relatively subjective assessment of current symptoms and medical history, devoid of an objective diagnostic modality. Antipsychotic medications are commonly used in the treatment of SCZ; however, some patients have low remission rates or forsake treatment due to the associated multiple side effects, resulting in recurrent episodes of the disease and poor prognosis. These situations imply that the diagnosis, treatment, and prognosis of SCZ need to be improved to increase the odds of a better outcome. Mounting studies have found that extracellular vesicles (EVs) play essential roles in the central nervous system. They are implicated in several mechanisms closely associated with SCZ such as cellular communication and synaptic plasticity. They can additionally exhibit neuroprotective and therapeutic effects. Since they possess distinct constituents, are readily available, easily detectable, and dependent on the internal environment, they can potentially serve as reliable biomarkers for disease diagnosis. Moreover, their biological configuration along with their ability to increase the bioavailability of their constituents and modulate intricate intracellular reactions in target cells, propel EVs as new targets for treatment. This review paper summarizes relevant research pertaining to the roles of EVs in SCZ, with the aim of improving insights into SCZ pathogenesis and evaluating EVs as potential biomarkers in the diagnosis and treatment of SCZ.
Collapse
|
10
|
Saha P, Skidmore PT, Holland LA, Mondal A, Bose D, Seth RK, Sullivan K, Janulewicz PA, Horner R, Klimas N, Nagarkatti M, Nagarkatti P, Lim ES, Chatterjee S. Andrographolide Attenuates Gut-Brain-Axis Associated Pathology in Gulf War Illness by Modulating Bacteriome-Virome Associated Inflammation and Microglia-Neuron Proinflammatory Crosstalk. Brain Sci 2021; 11:brainsci11070905. [PMID: 34356139 PMCID: PMC8304847 DOI: 10.3390/brainsci11070905] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2021] [Revised: 07/05/2021] [Accepted: 07/07/2021] [Indexed: 12/12/2022] Open
Abstract
Gulf War Illness (GWI) is a chronic multi-symptomatic illness that is associated with fatigue, pain, cognitive deficits, and gastrointestinal disturbances and presents a significant challenge to treat in clinics. Our previous studies show a role of an altered Gut–Brain axis pathology in disease development and symptom persistence in GWI. The present study utilizes a mouse model of GWI to study the role of a labdane diterpenoid andrographolide (AG) to attenuate the Gut–Brain axis-linked pathology. Results showed that AG treatment in mice (100 mg/kg) via oral gavage restored bacteriome alterations, significantly increased probiotic bacteria Akkermansia, Lachnospiraceae, and Bifidobacterium, the genera that are known to aid in preserving gut and immune health. AG also corrected an altered virome with significant decreases in virome families Siphoviridae and Myoviridae known to be associated with gastrointestinal pathology. AG treatment significantly restored tight junction proteins that correlated well with decreased intestinal proinflammatory mediators IL-1β and IL-6 release. AG treatment could restore Claudin-5 levels, crucial for maintaining the BBB integrity. Notably, AG could decrease microglial activation and increase neurotrophic factor BDNF, the key to neurogenesis. Mechanistically, microglial conditioned medium generated from IL-6 stimulation with or without AG in a concentration similar to circulating levels found in the GWI mouse model and co-incubated with neuronal cells in vitro, decreased Tau phosphorylation and neuronal apoptosis. In conclusion, we show that AG treatment mitigated the Gut–Brain-Axis associated pathology in GWI and may be considered as a potential therapeutic avenue for the much-needed bench to bedside strategies in GWI.
Collapse
Affiliation(s)
- Punnag Saha
- Environmental Health and Disease Laboratory, Department of Environmental Health Sciences, University of South Carolina, Columbia, SC 29208, USA; (P.S.); (A.M.); (D.B.); (R.K.S.)
| | - Peter T. Skidmore
- Center for Fundamental and Applied Microbiomics, The Biodesign Institute, Arizona State University, Tempe, AZ 85281, USA; (P.T.S.); (L.A.H.); (E.S.L.)
| | - LaRinda A. Holland
- Center for Fundamental and Applied Microbiomics, The Biodesign Institute, Arizona State University, Tempe, AZ 85281, USA; (P.T.S.); (L.A.H.); (E.S.L.)
| | - Ayan Mondal
- Environmental Health and Disease Laboratory, Department of Environmental Health Sciences, University of South Carolina, Columbia, SC 29208, USA; (P.S.); (A.M.); (D.B.); (R.K.S.)
| | - Dipro Bose
- Environmental Health and Disease Laboratory, Department of Environmental Health Sciences, University of South Carolina, Columbia, SC 29208, USA; (P.S.); (A.M.); (D.B.); (R.K.S.)
| | - Ratanesh K. Seth
- Environmental Health and Disease Laboratory, Department of Environmental Health Sciences, University of South Carolina, Columbia, SC 29208, USA; (P.S.); (A.M.); (D.B.); (R.K.S.)
| | - Kimberly Sullivan
- Department of Environmental Health, Boston University School of Public Health, Boston, MA 02118, USA; (K.S.); (P.A.J.)
| | - Patricia A. Janulewicz
- Department of Environmental Health, Boston University School of Public Health, Boston, MA 02118, USA; (K.S.); (P.A.J.)
| | - Ronnie Horner
- College of Public Health, University of Nebraska Medical Center, Omaha, NE 68198, USA;
| | - Nancy Klimas
- Institute for Neuro-Immune Medicine, Nova Southeastern University, Fort Lauderdale, FL 33314, USA;
| | - Mitzi Nagarkatti
- Department of Pathology, Microbiology and Immunology, University of South Carolina School of Medicine, Columbia, SC 29209, USA; (M.N.); (P.N.)
| | - Prakash Nagarkatti
- Department of Pathology, Microbiology and Immunology, University of South Carolina School of Medicine, Columbia, SC 29209, USA; (M.N.); (P.N.)
| | - Efrem S. Lim
- Center for Fundamental and Applied Microbiomics, The Biodesign Institute, Arizona State University, Tempe, AZ 85281, USA; (P.T.S.); (L.A.H.); (E.S.L.)
- School of Life Sciences, Arizona State University, Tempe, AZ 85281, USA
| | - Saurabh Chatterjee
- Environmental Health and Disease Laboratory, Department of Environmental Health Sciences, University of South Carolina, Columbia, SC 29208, USA; (P.S.); (A.M.); (D.B.); (R.K.S.)
- Columbia VA Medical Center, Columbia, SC 29209, USA
- Correspondence: ; Tel.: +1-803-777-8120 or +1-919-599-2278
| |
Collapse
|