1
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Wang Y, Yang X, Zhang Y, Hong L, Xie Z, Jiang W, Chen L, Xiong K, Yang S, Lin M, Guo X, Li Q, Deng X, Lin Y, Cao M, Yi G, Fu M. Single-cell RNA sequencing reveals roles of unique retinal microglia types in early diabetic retinopathy. Diabetol Metab Syndr 2024; 16:49. [PMID: 38409074 PMCID: PMC10895757 DOI: 10.1186/s13098-024-01282-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/17/2023] [Accepted: 02/02/2024] [Indexed: 02/28/2024] Open
Abstract
BACKGROUND The pathophysiological mechanisms of diabetic retinopathy (DR), a blinding disease, are intricate. DR was thought to be a microvascular disease previously. However, growing studies have indicated that the retinal microglia-induced inflammation precedes microangiopathy. The binary concept of microglial M1/M2 polarization paradigms during inflammatory activation has been debated. In this study, we confirmed microglia had the most significant changes in early DR using single-cell RNA sequencing. METHODS A total of five retinal specimens were collected from donor SD rats. Changes in various cells of the retina at the early stage of DR were analyzed using single-cell sequencing technology. RESULTS We defined three new microglial subtypes at cellular level, including two M1 types (Egr2+ M1 and Egr2- M1) and one M2 type. We also revealed the anatomical location between these subtypes, the dynamic changes of polarization phenotypes, and the possible activation sequence and mutual activation regulatory mechanism of different cells. Furthermore, we constructed an inflammatory network involving microglia, blood-derived macrophages and other retinal nonneuronal cells. The targeted study of new disease-specific microglial subtypes can shorten the time for drug screening and clinical application, which provided insight for the early control and reversal of DR. CONCLUSIONS We found that microglia show the most obvious differential expression changes in early DR and reveal the changes in microglia in a high-glucose microenvironment at the single-cell level. Our comprehensive analysis will help achieve early reversal and control the occurrence and progression of DR.
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Affiliation(s)
- Yan Wang
- Department of Ophthalmology, South China Hospital, Medical School, Shenzhen University, Shenzhen, 518116, People's Republic of China
| | - Xiongyi Yang
- The Second Clinical School, Southern Medical University, Guangzhou, Guangdong, People's Republic of China
| | - Yuxi Zhang
- State Key Laboratory of Organ Failure Research, National Clinical Research Center of Kidney Disease, Guangdong Provincial Institute of Nephrology, Nanfang Hospital, Southern Medical University, Guangzhou, People's Republic of China
| | - Libing Hong
- The Second Clinical School, Southern Medical University, Guangzhou, Guangdong, People's Republic of China
| | - Zhuohang Xie
- The Second Clinical School, Southern Medical University, Guangzhou, Guangdong, People's Republic of China
| | - Wenmin Jiang
- Department of Ophthalmology, The Second Xiangya Hospital of Central South University, Changsha, 410011, Hunan, People's Republic of China
- Hunan Clinical Research Center of Ophthalmic Disease, Changsha, 410011, Hunan, People's Republic of China
| | - Lin Chen
- Department of Anesthesiology, Shenzhen Hospital, Southern Medical University, 1333 Xinhu Road, Shenzhen, 518100, Guangdong, People's Republic of China
| | - Ke Xiong
- Department of Ophthalmology, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, Guangdong, People's Republic of China
| | - Siyu Yang
- Department of Ophthalmology, The Seventh Affiliated Hospital, Sun Yat-Sen University, Shenzhen, People's Republic of China
| | - Meiping Lin
- The Second Clinical School, Southern Medical University, Guangzhou, Guangdong, People's Republic of China
| | - Xi Guo
- School of Rehabilitation Medicine, Southern Medical University, Guangzhou, Guangdong, People's Republic of China
| | - Qiumo Li
- The Second Clinical School, Southern Medical University, Guangzhou, Guangdong, People's Republic of China
| | - Xiaoqing Deng
- The Second Clinical School, Southern Medical University, Guangzhou, Guangdong, People's Republic of China
| | - Yanhui Lin
- Health Management Center, The Third Xiangya Hospital, Central South University, Changsha, 410013, Hunan, People's Republic of China
| | - Mingzhe Cao
- Department of Ophthalmology, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, Guangdong, People's Republic of China.
| | - Guoguo Yi
- Department of Ophthalmology, The Sixth Affiliated Hospital, Sun Yat-Sen University, No. 26, Erheng Road, Yuancun, Tianhe, Guangzhou, Guangdong, People's Republic of China.
- Biomedical Innovation Center, The Sixth Affiliated Hospital, Sun Yat-Sen University, Guangzhou, People's Republic of China.
| | - Min Fu
- Department of Ophthalmology, Zhujiang Hospital, Southern Medical University, Guangzhou, Guangdong, People's Republic of China.
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Boylan BT, Hwang M, Bergmann CC. The Impact of Innate Components on Viral Pathogenesis in the Neurotropic Coronavirus Encephalomyelitis Mouse Model. Viruses 2023; 15:2400. [PMID: 38140641 PMCID: PMC10747027 DOI: 10.3390/v15122400] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2023] [Revised: 12/04/2023] [Accepted: 12/07/2023] [Indexed: 12/24/2023] Open
Abstract
Recognition of viruses invading the central nervous system (CNS) by pattern recognition receptors (PRRs) is crucial to elicit early innate responses that stem dissemination. These innate responses comprise both type I interferon (IFN-I)-mediated defenses as well as signals recruiting leukocytes to control the infection. Focusing on insights from the neurotropic mouse CoV model, this review discusses how early IFN-I, fibroblast, and myeloid signals can influence protective anti-viral adaptive responses. Emphasis is placed on three main areas: the importance of coordinating the distinct capacities of resident CNS cells to induce and respond to IFN-I, the effects of select IFN-stimulated genes (ISGs) on host immune responses versus viral control, and the contribution of fibroblast activation and myeloid cells in aiding the access of T cells to the parenchyma. By unraveling how the dysregulation of early innate components influences adaptive immunity and viral control, this review illustrates the combined effort of resident CNS cells to achieve viral control.
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Affiliation(s)
- Brendan T. Boylan
- Department of Neurosciences, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44196, USA; (B.T.B.); (M.H.)
- Department of Pathology, Case Western Reserve University, Cleveland, OH 44106, USA
| | - Mihyun Hwang
- Department of Neurosciences, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44196, USA; (B.T.B.); (M.H.)
- Molecular Medicine, Cleveland Clinic Lerner College of Medicine, Case Western Reserve University, Cleveland, OH 44106, USA
| | - Cornelia C. Bergmann
- Department of Neurosciences, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44196, USA; (B.T.B.); (M.H.)
- Department of Pathology, Case Western Reserve University, Cleveland, OH 44106, USA
- Molecular Medicine, Cleveland Clinic Lerner College of Medicine, Case Western Reserve University, Cleveland, OH 44106, USA
- Department of Biological, Geological and Environmental Sciences, Cleveland State University, Cleveland, OH 44115, USA
- School of Biological Sciences, Kent State University, Kent, OH 44242, USA
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3
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Syage A, Pachow C, Cheng Y, Mangale V, Green KN, Lane TE. Microglia influence immune responses and restrict neurologic disease in response to central nervous system infection by a neurotropic murine coronavirus. Front Cell Neurosci 2023; 17:1291255. [PMID: 38099152 PMCID: PMC10719854 DOI: 10.3389/fncel.2023.1291255] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2023] [Accepted: 11/09/2023] [Indexed: 12/17/2023] Open
Abstract
Intracranial (i.c.) inoculation of susceptible mice with a glial-tropic strain of mouse hepatitis virus (JHMV), a murine coronavirus, results in an acute encephalomyelitis followed by viral persistence in white matter tracts accompanied by chronic neuroinflammation and demyelination. Microglia serve numerous functions including maintenance of the healthy central nervous system (CNS) and are among the first responders to injury or infection. More recently, studies have demonstrated that microglia aid in tailoring innate and adaptive immune responses following infection by neurotropic viruses including flaviviruses, herpesviruses, and picornaviruses. These findings have emphasized an important role for microglia in host defense against these viral pathogens. In addition, microglia are also critical in optimizing immune-mediated control of JHMV replication within the CNS while restricting the severity of demyelination and enhancing remyelination. This review will highlight our current understanding of the molecular and cellular mechanisms by which microglia aid in host defense, limit neurologic disease, and promote repair following CNS infection by a neurotropic murine coronavirus.
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Affiliation(s)
- Amber Syage
- Department of Neurobiology and Behavior, University of California, Irvine, Irvine, CA, United States
| | - Collin Pachow
- Department of Molecular Biology and Biochemistry, University of California, Irvine, Irvine, CA, United States
| | - Yuting Cheng
- Department of Molecular Biology and Biochemistry, University of California, Irvine, Irvine, CA, United States
| | - Vrushali Mangale
- Department of Pathology, University of Utah, Salt Lake City, UT, United States
| | - Kim N. Green
- Department of Neurobiology and Behavior, University of California, Irvine, Irvine, CA, United States
| | - Thomas E. Lane
- Department of Neurobiology and Behavior, University of California, Irvine, Irvine, CA, United States
- Center for Virus Research, University of California, Irvine, Irvine, CA, United States
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4
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Tresse E, Marturia-Navarro J, Sew WQG, Cisquella-Serra M, Jaberi E, Riera-Ponsati L, Fauerby N, Hu E, Kretz O, Aznar S, Issazadeh-Navikas S. Mitochondrial DNA damage triggers spread of Parkinson's disease-like pathology. Mol Psychiatry 2023; 28:4902-4914. [PMID: 37779111 PMCID: PMC10914608 DOI: 10.1038/s41380-023-02251-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/05/2023] [Revised: 09/04/2023] [Accepted: 09/05/2023] [Indexed: 10/03/2023]
Abstract
In the field of neurodegenerative diseases, especially sporadic Parkinson's disease (sPD) with dementia (sPDD), the question of how the disease starts and spreads in the brain remains central. While prion-like proteins have been designated as a culprit, recent studies suggest the involvement of additional factors. We found that oxidative stress, damaged DNA binding, cytosolic DNA sensing, and Toll-Like Receptor (TLR)4/9 activation pathways are strongly associated with the sPDD transcriptome, which has dysregulated type I Interferon (IFN) signaling. In sPD patients, we confirmed deletions of mitochondrial (mt)DNA in the medial frontal gyrus, suggesting a potential role of damaged mtDNA in the disease pathophysiology. To explore its contribution to pathology, we used spontaneous models of sPDD caused by deletion of type I IFN signaling (Ifnb-/-/Ifnar-/- mice). We found that the lack of neuronal IFNβ/IFNAR leads to oxidization, mutation, and deletion in mtDNA, which is subsequently released outside the neurons. Injecting damaged mtDNA into mouse brain induced PDD-like behavioral symptoms, including neuropsychiatric, motor, and cognitive impairments. Furthermore, it caused neurodegeneration in brain regions distant from the injection site, suggesting that damaged mtDNA triggers spread of PDD characteristics in an "infectious-like" manner. We also discovered that the mechanism through which damaged mtDNA causes pathology in healthy neurons is independent of Cyclic GMP-AMP synthase and IFNβ/IFNAR, but rather involves the dual activation of TLR9/4 pathways, resulting in increased oxidative stress and neuronal cell death, respectively. Our proteomic analysis of extracellular vesicles containing damaged mtDNA identified the TLR4 activator, Ribosomal Protein S3 as a key protein involved in recognizing and extruding damaged mtDNA. These findings might shed light on new molecular pathways through which damaged mtDNA initiates and spreads PD-like disease, potentially opening new avenues for therapeutic interventions or disease monitoring.
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Affiliation(s)
- Emilie Tresse
- Neuroinflammation Unit, Biotech Research & Innovation Centre (BRIC), Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen Biocentre, Ole Maaløes Vej 5, DK-2200, Copenhagen N, Denmark
| | - Joana Marturia-Navarro
- Neuroinflammation Unit, Biotech Research & Innovation Centre (BRIC), Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen Biocentre, Ole Maaløes Vej 5, DK-2200, Copenhagen N, Denmark
| | - Wei Qi Guinevere Sew
- Neuroinflammation Unit, Biotech Research & Innovation Centre (BRIC), Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen Biocentre, Ole Maaløes Vej 5, DK-2200, Copenhagen N, Denmark
| | - Marina Cisquella-Serra
- Neuroinflammation Unit, Biotech Research & Innovation Centre (BRIC), Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen Biocentre, Ole Maaløes Vej 5, DK-2200, Copenhagen N, Denmark
| | - Elham Jaberi
- Neuroinflammation Unit, Biotech Research & Innovation Centre (BRIC), Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen Biocentre, Ole Maaløes Vej 5, DK-2200, Copenhagen N, Denmark
| | - Lluis Riera-Ponsati
- Neuroinflammation Unit, Biotech Research & Innovation Centre (BRIC), Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen Biocentre, Ole Maaløes Vej 5, DK-2200, Copenhagen N, Denmark
| | - Natasha Fauerby
- Neuroinflammation Unit, Biotech Research & Innovation Centre (BRIC), Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen Biocentre, Ole Maaløes Vej 5, DK-2200, Copenhagen N, Denmark
| | - Erling Hu
- Neuroinflammation Unit, Biotech Research & Innovation Centre (BRIC), Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen Biocentre, Ole Maaløes Vej 5, DK-2200, Copenhagen N, Denmark
| | - Oliver Kretz
- Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Susana Aznar
- Centre for Neuroscience and Stereology, University Hospital Bispebjerg-Frederiksberg, 2400, Copenhagen, Denmark
| | - Shohreh Issazadeh-Navikas
- Neuroinflammation Unit, Biotech Research & Innovation Centre (BRIC), Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen Biocentre, Ole Maaløes Vej 5, DK-2200, Copenhagen N, Denmark.
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5
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Garces A, Martinez B, De La Garza R, Roy D, Vallee KA, Fields JA, Moore DJ, Rodrigo H, Roy U. Differential expression of interferon-induced protein with tetratricopeptide repeats 3 (IFIT3) in Alzheimer's disease and HIV-1 associated neurocognitive disorders. Sci Rep 2023; 13:3276. [PMID: 36841839 PMCID: PMC9968324 DOI: 10.1038/s41598-022-27276-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2022] [Accepted: 12/29/2022] [Indexed: 02/27/2023] Open
Abstract
The United Nations projects that one in every six people will be over the age of 65 by the year 2050. With a rapidly aging population, the risk of Alzheimer's disease (AD) becomes a major concern. AD is a multifactorial disease that involves neurodegeneration in the brain with mild dementia and deficits in memory and other cognitive domains. Additionally, it has been established that individuals with Human Immunodeficiency Virus-1 (HIV-1) experience a 5 to 10-year accelerated aging and an increased risk of developing HIV-associated neurocognitive disorders (HAND). Despite a significant amount of clinical evidence pointing towards a potential overlap between neuropathogenic processes in HAND and AD, the underlying epigenetic link between these two diseases is mostly unknown. This study is focused on identifying differentially expressed genes observed in both AD and HAND using linear regression models and a more robust significance analysis of microarray. The results established that the dysregulated type 1 and 2 interferon pathways observed in both AD and HAND contribute to the similar pathologies of these diseases within the brain. The current study identifies the important roles of interferon pathways in AD and HAND, a relationship that may be useful for earlier detection in the future.
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Affiliation(s)
- Armando Garces
- Department of Health and Biomedical Sciences, University of Texas Rio Grande Valley, One West University Blvd, Brownsville, TX, 78520, USA
| | - Bryan Martinez
- Department of Health and Biomedical Sciences, University of Texas Rio Grande Valley, One West University Blvd, Brownsville, TX, 78520, USA
| | - Roberto De La Garza
- Department of Health and Biomedical Sciences, University of Texas Rio Grande Valley, One West University Blvd, Brownsville, TX, 78520, USA
| | - Deepa Roy
- Department of Health and Biomedical Sciences, University of Texas Rio Grande Valley, One West University Blvd, Brownsville, TX, 78520, USA
| | - Kaylie-Anna Vallee
- Department of Psychiatry, University of California, San Diego, La Jolla, CA, USA
| | - Jerel Adam Fields
- Department of Psychiatry, University of California, San Diego, La Jolla, CA, USA
| | - David J Moore
- Department of Psychiatry, University of California, San Diego, La Jolla, CA, USA
| | - Hansapani Rodrigo
- School of Mathematical and Statistical Sciences, University of Texas Rio Grande Valley (UTRGV), Edinburg, TX, USA.
| | - Upal Roy
- Department of Health and Biomedical Sciences, University of Texas Rio Grande Valley, One West University Blvd, Brownsville, TX, 78520, USA.
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6
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Elizalde-Díaz JP, Miranda-Narváez CL, Martínez-Lazcano JC, Martínez-Martínez E. The relationship between chronic immune response and neurodegenerative damage in long COVID-19. Front Immunol 2022; 13:1039427. [PMID: 36591299 PMCID: PMC9800881 DOI: 10.3389/fimmu.2022.1039427] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2022] [Accepted: 11/28/2022] [Indexed: 12/23/2022] Open
Abstract
In the past two years, the world has faced the pandemic caused by the severe acute respiratory syndrome 2 coronavirus (SARS-CoV-2), which by August of 2022 has infected around 619 million people and caused the death of 6.55 million individuals globally. Although SARS-CoV-2 mainly affects the respiratory tract level, there are several reports, indicating that other organs such as the heart, kidney, pancreas, and brain can also be damaged. A characteristic observed in blood serum samples of patients suffering COVID-19 disease in moderate and severe stages, is a significant increase in proinflammatory cytokines such as interferon-α (IFN-α), interleukin-1β (IL-1β), interleukin-2 (IL-2), interleukin-6 (IL-6) and interleukin-18 (IL-18), as well as the presence of autoantibodies against interferon-α (IFN-α), interferon-λ (IFN-λ), C-C motif chemokine ligand 26 (CCL26), CXC motif chemokine ligand 12 (CXCL12), family with sequence similarity 19 (chemokine (C-C motif)-like) member A4 (FAM19A4), and C-C motif chemokine ligand 1 (CCL1). Interestingly, it has been described that the chronic cytokinemia is related to alterations of blood-brain barrier (BBB) permeability and induction of neurotoxicity. Furthermore, the generation of autoantibodies affects processes such as neurogenesis, neuronal repair, chemotaxis and the optimal microglia function. These observations support the notion that COVID-19 patients who survived the disease present neurological sequelae and neuropsychiatric disorders. The goal of this review is to explore the relationship between inflammatory and humoral immune markers and the major neurological damage manifested in post-COVID-19 patients.
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Affiliation(s)
- José Pedro Elizalde-Díaz
- Laboratory of Cell Communication & Extracellular Vesicles, Division of Basic Science, Instituto Nacional de Medicina Genómica, Ciudad de México, Mexico
| | - Clara Leticia Miranda-Narváez
- Laboratorio de Neurofarmacología Molecular y Nanotecnología, Instituto Nacional de Neurología y Neurocirugía Manuel Velasco Suárez, Ciudad de México, Mexico
| | - Juan Carlos Martínez-Lazcano
- Laboratorio de Neurofarmacología Molecular y Nanotecnología, Instituto Nacional de Neurología y Neurocirugía Manuel Velasco Suárez, Ciudad de México, Mexico
| | - Eduardo Martínez-Martínez
- Laboratory of Cell Communication & Extracellular Vesicles, Division of Basic Science, Instituto Nacional de Medicina Genómica, Ciudad de México, Mexico
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7
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Cardani‐Boulton A, Boylan BT, Stetsenko V, Bergmann CC. B cells going viral in the CNS: Dynamics, complexities, and functions of B cells responding to viral encephalitis. Immunol Rev 2022; 311:75-89. [PMID: 35984298 PMCID: PMC9804320 DOI: 10.1111/imr.13124] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
A diverse number of DNA and RNA viruses have the potential to invade the central nervous system (CNS), causing inflammation and injury to cells that have a limited capacity for repair and regeneration. While rare, viral encephalitis in humans is often fatal and survivors commonly suffer from permanent neurological sequelae including seizures. Established treatment options are extremely limited, predominantly relying on vaccines, antivirals, or supportive care. Many viral CNS infections are characterized by the presence of antiviral antibodies in the cerebral spinal fluid (CSF), indicating local maintenance of protective antibody secreting cells. However, the mechanisms maintaining these humoral responses are poorly characterized. Furthermore, while both viral and autoimmune encephalitis are associated with the recruitment of diverse B cell subsets to the CNS, their protective and pathogenic roles aside from antibody production are just beginning to be understood. This review will focus on the relevance of B cell responses to viral CNS infections, with an emphasis on the importance of intrathecal immunity and the potential contribution to autoimmunity. Specifically, it will summarize the newest data characterizing B cell activation, differentiation, migration, and localization in clinical samples as well as experimental models of acute and persistent viral encephalitis.
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Affiliation(s)
| | - Brendan T. Boylan
- Cleveland Clinic Lerner Research Institute, NeuroscienceClevelandOhioUSA,Case Western Reserve University School of Medicine, PathologyClevelandOhioUSA
| | - Volodymyr Stetsenko
- Cleveland Clinic Lerner Research Institute, NeuroscienceClevelandOhioUSA,Kent State University, School of Biomedical SciencesKentOhioUSA
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8
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Wang YC, Lu YB, Huang XL, Lao YF, Zhang L, Yang J, Shi M, Ma HL, Pan YW, Zhang YN. Myeloperoxidase: a new target for the treatment of stroke? Neural Regen Res 2022; 17:1711-1716. [PMID: 35017418 PMCID: PMC8820716 DOI: 10.4103/1673-5374.332130] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Myeloperoxidase is an important inflammatory factor in the myeloid system, primarily expressed in neutrophils and microglia. Myeloperoxidase and its active products participate in the occurrence and development of hemorrhagic and ischemic stroke, including damage to the blood-brain barrier and brain. As a specific inflammatory marker, myeloperoxidase can be used in the evaluation of vascular disease occurrence and development in stroke, and a large amount of experimental and clinical data has indicated that the inhibition or lack of myeloperoxidase has positive impacts on stroke prognosis. Many studies have also shown that there is a correlation between the overexpression of myeloperoxidase and the risk of stroke. The occurrence of stroke not only refers to the first occurrence but also includes recurrence. Therefore, myeloperoxidase is significant for the clinical evaluation and prognosis of stroke. This paper reviews the potential role played by myeloperoxidase in the development of vascular injury and secondary brain injury after stroke and explores the effects of inhibiting myeloperoxidase on stroke prognosis. This paper also analyzes the significance of myeloperoxidase etiology in the occurrence and development of stroke and discusses whether myeloperoxidase can be used as a target for the treatment and prediction of stroke.
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Affiliation(s)
- Yun-Chang Wang
- The Second Clinical Medical School, Lanzhou University; Department of Neurosurgery, Lanzhou University Second Hospital, Lanzhou, Gansu Province; Xiangya Hospital, Central South University, Changsha, Hunan Province, China
| | - Yu-Bao Lu
- The Second Clinical Medical School, Lanzhou University; Department of Neurosurgery, Lanzhou University Second Hospital, Lanzhou, Gansu Province; Department of Spine Surgery, The Third Affiliated Hospital, Sun Yat-sen University, Guangzhou, Guangdong Province, China
| | - Xiao-Lan Huang
- University of Chinese Academy of Sciences, Beijing, China
| | - Yong-Feng Lao
- The Second Clinical Medical School, Lanzhou University, Lanzhou, Gansu Province, China
| | - Lu Zhang
- The Second Clinical Medical School, Lanzhou University, Lanzhou, Gansu Province, China
| | - Jun Yang
- The Second Clinical Medical School, Lanzhou University, Lanzhou, Gansu Province, China
| | - Mei Shi
- The Second Clinical Medical School, Lanzhou University, Lanzhou, Gansu Province, China
| | - Hai-Long Ma
- The Second Clinical Medical School, Lanzhou University, Lanzhou, Gansu Province, China
| | - Ya-Wen Pan
- The Second Clinical Medical School, Lanzhou University; Department of Neurosurgery, Lanzhou University Second Hospital, Lanzhou, Gansu Province, China
| | - Yi-Nian Zhang
- The Second Clinical Medical School, Lanzhou University; Department of Neurosurgery, Lanzhou University Second Hospital, Lanzhou, Gansu Province, China
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9
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Zhang SY, Harschnitz O, Studer L, Casanova JL. Neuron-intrinsic immunity to viruses in mice and humans. Curr Opin Immunol 2021; 72:309-317. [PMID: 34425410 DOI: 10.1016/j.coi.2021.07.004] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Revised: 07/08/2021] [Accepted: 07/14/2021] [Indexed: 12/11/2022]
Abstract
Viral encephalitis is a major neglected medical problem. Host defense mechanisms against viral infection of the central nervous system (CNS) have long remained unclear. The few previous studies of CNS-specific immunity to viruses in mice in vivo and humans in vitro have focused on the contributions of circulating leukocytes, resident microglial cells and astrocytes, with neurons long considered passive victims of viral infection requiring protection from extrinsic antiviral mechanisms. The last decade has witnessed the gradual emergence of the notion that neurons also combat viruses through cell-intrinsic mechanisms. Forward genetic approaches in humans have shown that monogenic inborn errors of TLR3, IFN-α/β, or snoRNA31 immunity confer susceptibility to herpes simplex virus 1 (HSV-1) infection of the forebrain, whereas inborn errors of DBR1 underlie brainstem infections due to various viruses, including HSV-1. The study of human pluripotent stem cell (hPSC)-derived CNS-resident cells has unraveled known (i.e. TLR3-dependent IFN-α/β immunity) and new (i.e. snoRNA31-dependent or DBR1-dependent immunity) cell-intrinsic antiviral mechanisms operating in neurons. Reverse genetic approaches in mice have confirmed that some known antiviral mechanisms also operate in mouse neurons (e.g. TLR3 and IFN-α/β immunity). The search for human inborn errors of immunity (IEIs) underlying various forms of viral encephalitis, coupled with mouse models in vivo, and hPSC-based culture models of CNS and peripheral nervous system cells and organoids in vitro, should shed further light on the cell-specific and tissue-specific mechanisms of host defense against viruses in the human brain.
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Affiliation(s)
- Shen-Ying Zhang
- St. Giles Laboratory of Human Genetics of Infectious Diseases, Rockefeller Branch, The Rockefeller University, New York, NY, USA; Laboratory of Human Genetics of Infectious Diseases, Necker Branch, INSERM U1163, Paris, France; University of Paris, Imagine Institute, Paris, France.
| | - Oliver Harschnitz
- The Center for Stem Cell Biology, Sloan-Kettering Institute for Cancer Research, New York, NY, USA; Developmental Biology Program, Sloan-Kettering Institute for Cancer Research, 1275 York Avenue, New York, NY, USA
| | - Lorenz Studer
- The Center for Stem Cell Biology, Sloan-Kettering Institute for Cancer Research, New York, NY, USA; Developmental Biology Program, Sloan-Kettering Institute for Cancer Research, 1275 York Avenue, New York, NY, USA
| | - Jean-Laurent Casanova
- St. Giles Laboratory of Human Genetics of Infectious Diseases, Rockefeller Branch, The Rockefeller University, New York, NY, USA; Laboratory of Human Genetics of Infectious Diseases, Necker Branch, INSERM U1163, Paris, France; University of Paris, Imagine Institute, Paris, France; Howard Hughes Medical Institute, New York, NY, USA
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10
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Francistiová L, Klepe A, Curley G, Gulya K, Dinnyés A, Filkor K. Cellular and Molecular Effects of SARS-CoV-2 Linking Lung Infection to the Brain. Front Immunol 2021; 12:730088. [PMID: 34484241 PMCID: PMC8414801 DOI: 10.3389/fimmu.2021.730088] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2021] [Accepted: 07/27/2021] [Indexed: 12/13/2022] Open
Abstract
In December 2019, a new viral disease emerged and quickly spread all around the world. In March 2020, the COVID-19 outbreak was classified as a global pandemic and by June 2021, the number of infected people grew to over 170 million. Along with the patients' mild-to-severe respiratory symptoms, reports on probable central nervous system (CNS) effects appeared shortly, raising concerns about the possible long-term detrimental effects on human cognition. It remains unresolved whether the neurological symptoms are caused directly by the SARS-CoV-2 infiltration in the brain, indirectly by secondary immune effects of a cytokine storm and antibody overproduction, or as a consequence of systemic hypoxia-mediated microglia activation. In severe COVID-19 cases with impaired lung capacity, hypoxia is an anticipated subsidiary event that can cause progressive and irreversible damage to neurons. To resolve this problem, intensive research is currently ongoing, which seeks to evaluate the SARS-CoV-2 virus' neuroinvasive potential and the examination of the antibody and autoantibody generation upon infection, as well as the effects of prolonged systemic hypoxia on the CNS. In this review, we summarize the current research on the possible interplay of the SARS-CoV-2 effects on the lung, especially on alveolar macrophages and direct and indirect effects on the brain, with special emphasis on microglia, as a possible culprit of neurological manifestation during COVID-19.
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Affiliation(s)
- Linda Francistiová
- BioTalentum Ltd, Gödöllő, Hungary
- Department of Physiology and Animal Health, Institute of Physiology and Animal Health, Hungarian University of Agriculture and Life Sciences, Gödöllő, Hungary
| | - Adrián Klepe
- BioTalentum Ltd, Gödöllő, Hungary
- Department of Cell Biology and Molecular Medicine, University of Szeged, Szeged, Hungary
- Hungarian Centre of Excellence for Molecular Medicine - University of Szeged (HCEMM-USZ) StemCell Research Group, University of Szeged, Szeged, Hungary
| | - Géza Curley
- BioTalentum Ltd, Gödöllő, Hungary
- Department of Cell Biology and Molecular Medicine, University of Szeged, Szeged, Hungary
- Hungarian Centre of Excellence for Molecular Medicine - University of Szeged (HCEMM-USZ) StemCell Research Group, University of Szeged, Szeged, Hungary
| | - Károly Gulya
- Department of Cell Biology and Molecular Medicine, University of Szeged, Szeged, Hungary
| | - András Dinnyés
- BioTalentum Ltd, Gödöllő, Hungary
- Department of Cell Biology and Molecular Medicine, University of Szeged, Szeged, Hungary
- Hungarian Centre of Excellence for Molecular Medicine - University of Szeged (HCEMM-USZ) StemCell Research Group, University of Szeged, Szeged, Hungary
| | - Kata Filkor
- BioTalentum Ltd, Gödöllő, Hungary
- Department of Cell Biology and Molecular Medicine, University of Szeged, Szeged, Hungary
- Hungarian Centre of Excellence for Molecular Medicine - University of Szeged (HCEMM-USZ) StemCell Research Group, University of Szeged, Szeged, Hungary
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The Influence of Virus Infection on Microglia and Accelerated Brain Aging. Cells 2021; 10:cells10071836. [PMID: 34360004 PMCID: PMC8303900 DOI: 10.3390/cells10071836] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2021] [Revised: 07/15/2021] [Accepted: 07/16/2021] [Indexed: 12/12/2022] Open
Abstract
Microglia are the resident immune cells of the central nervous system contributing substantially to health and disease. There is increasing evidence that inflammatory microglia may induce or accelerate brain aging, by interfering with physiological repair and remodeling processes. Many viral infections affect the brain and interfere with microglia functions, including human immune deficiency virus, flaviviruses, SARS-CoV-2, influenza, and human herpes viruses. Especially chronic viral infections causing low-grade neuroinflammation may contribute to brain aging. This review elucidates the potential role of various neurotropic viruses in microglia-driven neurocognitive deficiencies and possibly accelerated brain aging.
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Ferraro E, Germanò M, Mollace R, Mollace V, Malara N. HIF-1, the Warburg Effect, and Macrophage/Microglia Polarization Potential Role in COVID-19 Pathogenesis. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2021; 2021:8841911. [PMID: 33815663 PMCID: PMC7987467 DOI: 10.1155/2021/8841911] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/18/2020] [Revised: 01/07/2021] [Accepted: 03/03/2021] [Indexed: 02/07/2023]
Abstract
Despite the international scientific community's commitment to improve clinical knowledge about coronavirus disease 2019 (COVID-19), knowledge regarding molecular details remains limited. In this review, we discuss hypoxia's potential role in the pathogenesis of the maladaptive immune reaction against severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2). The state of infection, with serious respiratory dysfunction, causes tissues to become hypoxic due to a discrepancy between cellular O2 uptake and consumption similar to that seen within tumor tissue during the progression of numerous solid cancers. In this context, the heterogeneous clinical behavior and the multiorgan deterioration of COVID-19 are discussed as a function of the upregulated expression of the hypoxia-inducible factor-1 (HIF-1) and of the metabolic reprogramming associated with HIF-1 and with a proinflammatory innate immune response activation, independent of the increase in the viral load of SARS-CoV-2. Possible pharmacological strategies targeting O2 aimed to improve prognosis are suggested.
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