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Lu H, Liao Y, Zhang C, Wen W, Du Y, Zhao M, Wang L. A case of herpes simplex virus induced peripheral neuropathy and encephalitis with positive GM3 and CASPR2 antibody. BMC Neurol 2023; 23:199. [PMID: 37210504 DOI: 10.1186/s12883-023-03238-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2022] [Accepted: 05/04/2023] [Indexed: 05/22/2023] Open
Abstract
BACKGROUND We reported on a case involving an older patient with HSV-1 encephalitis who simultaneously experienced the onset of peripheral nerve symptoms associated with the presence of anti-GM3 immunoglobulin G (IgG). CASE PRESENTATION A 77-year-old male was admitted to hospital with high fever, weakness of both lower limbs, and an unstable gait. A CSF test revealed a strikingly increased protein level (1,002 mg/L, normative values: 150-450 mg/L) and MRI revealed hyper-signal lesions in the right temporal lobe, right hippocampus, right insula, and right cingulate gyrus. The CSF was positive for HSV PCR (HSV-1,17870). In addition, the serum samples were positive for CASPR2 antibodies (antibody titer: 1/10) and anti-GM3 immunoglobulin G (IgG) (+). The patient was diagnosed with HSV-1-induced peripheral nerve symptoms that were associated with encephalitis and the presence of anti-GM3 IgG and anti-CASPR2 antibodies. The patient had received included intravenous immunoglobulin, intravenous acyclovir, and corticosteroids therapy. At the one-year follow-up examination, he had regained the necessary skills associated with daily life. CONCLUSIONS Herpes simplex virus infection often induces encephalitis, and reaction to the virus may trigger an autoimmune response. Early diagnosis and treatment can avoid the progression of the disease to include autoimmune encephalitis.
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Affiliation(s)
- Hongji Lu
- The Neurological Intensive Care Unit of Guangdong Provincial Hospital of Chinese Medicine, Guangzhou, 510120, China
- The Second Clinical School, Guangzhou University of Chinese Medicine, Guangzhou, 510120, China
| | - Yingdi Liao
- The Rehabilitation Department, Kunming Municipal Hospital of Traditional Chinese Medicine, Kunming, 650000, China
| | - Changlin Zhang
- The Second Clinical School, Guangzhou University of Chinese Medicine, Guangzhou, 510120, China
- Department of Stroke Center, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, 510120, China
| | - Wanxin Wen
- The Neurological Intensive Care Unit of Guangdong Provincial Hospital of Chinese Medicine, Guangzhou, 510120, China
- The Second Clinical School, Guangzhou University of Chinese Medicine, Guangzhou, 510120, China
| | - Yaming Du
- The Second Clinical School, Guangzhou University of Chinese Medicine, Guangzhou, 510120, China
| | - Min Zhao
- The Second Clinical School, Guangzhou University of Chinese Medicine, Guangzhou, 510120, China
- The Encephallopathy Department.1 of Guangdong Provincial Hospital of Chinese Medicine, Guangzhou, 510120, China
| | - Lixin Wang
- The Neurological Intensive Care Unit of Guangdong Provincial Hospital of Chinese Medicine, Guangzhou, 510120, China.
- The Second Clinical School, Guangzhou University of Chinese Medicine, Guangzhou, 510120, China.
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Gottschalk CG, Peterson D, Armstrong J, Knox K, Roy A. Potential molecular mechanisms of chronic fatigue in long haul COVID and other viral diseases. Infect Agent Cancer 2023; 18:7. [PMID: 36750846 PMCID: PMC9902840 DOI: 10.1186/s13027-023-00485-z] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2022] [Accepted: 02/01/2023] [Indexed: 02/09/2023] Open
Abstract
Historically, COVID-19 emerges as one of the most devastating diseases of humankind, which creates an unmanageable health crisis worldwide. Until now, this disease costs millions of lives and continues to paralyze human civilization's economy and social growth, leaving an enduring damage that will take an exceptionally long time to repair. While a majority of infected patients survive after mild to moderate reactions after two to six weeks, a growing population of patients suffers for months with severe and prolonged symptoms of fatigue, depression, and anxiety. These patients are no less than 10% of total COVID-19 infected individuals with distinctive chronic clinical symptomatology, collectively termed post-acute sequelae of COVID-19 (PASC) or more commonly long-haul COVID. Interestingly, Long-haul COVID and many debilitating viral diseases display a similar range of clinical symptoms of muscle fatigue, dizziness, depression, and chronic inflammation. In our current hypothesis-driven review article, we attempt to discuss the molecular mechanism of muscle fatigue in long-haul COVID, and other viral diseases as caused by HHV6, Powassan, Epstein-Barr virus (EBV), and HIV. We also discuss the pathological resemblance of virus-triggered muscle fatigue with myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS).
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Affiliation(s)
- Carl Gunnar Gottschalk
- Simmaron Research INC, 948 Incline Way, Incline Village, NV 89451 USA ,grid.267468.90000 0001 0695 7223Research and Development Laboratory, Department of Chemistry and Biochemistry, University of Wisconsin-Milwaukee, Milwaukee, WI 53211 USA ,Coppe Laboratories, W229N1870 Westwood Dr, Waukesha, WI 53186 USA
| | - Daniel Peterson
- Simmaron Research INC, 948 Incline Way, Incline Village, NV 89451 USA ,Coppe Laboratories, W229N1870 Westwood Dr, Waukesha, WI 53186 USA
| | - Jan Armstrong
- Simmaron Research INC, 948 Incline Way, Incline Village, NV 89451 USA ,Coppe Laboratories, W229N1870 Westwood Dr, Waukesha, WI 53186 USA
| | - Konstance Knox
- grid.267468.90000 0001 0695 7223Research and Development Laboratory, Department of Chemistry and Biochemistry, University of Wisconsin-Milwaukee, Milwaukee, WI 53211 USA ,Coppe Laboratories, W229N1870 Westwood Dr, Waukesha, WI 53186 USA
| | - Avik Roy
- Simmaron Research INC, 948 Incline Way, Incline Village, NV, 89451, USA. .,Research and Development Laboratory, Department of Chemistry and Biochemistry, University of Wisconsin-Milwaukee, Milwaukee, WI, 53211, USA. .,Coppe Laboratories, W229N1870 Westwood Dr, Waukesha, WI, 53186, USA.
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Unger PPA, Oja AE, Khemai-Mehraban T, Ouwendijk WJD, Hombrink P, Verjans GMGM. T-cells in human trigeminal ganglia express canonical tissue-resident memory T-cell markers. J Neuroinflammation 2022; 19:249. [PMID: 36203181 PMCID: PMC9535861 DOI: 10.1186/s12974-022-02611-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2022] [Accepted: 09/27/2022] [Indexed: 11/30/2022] Open
Abstract
BACKGROUND Trigeminal ganglia (TG) neurons are the main site of lifelong latent herpes simplex virus type 1 (HSV-1) infection. T-cells in ganglia contribute to long-term control of latent HSV-1 infection, but it is unclear whether these cells are bona fide tissue-resident memory T-cells (TRM). We optimized the processing of human post-mortem nervous tissue to accurately phenotype T-cells in human TG ex vivo and in situ. METHODS Peripheral blood mononuclear cells (PBMC; 5 blood donors) were incubated with several commercial tissue digestion enzyme preparations to determine off-target effect on simultaneous detection of 15 specific T-cell subset markers by flow cytometry. Next, optimized enzymatic digestion was applied to ex vivo phenotype T-cells in paired PBMC, normal appearing white matter (NAWM) and TG of 8 deceased brain donors obtained < 9 h post-mortem by flow cytometry. Finally, the phenotypic and functional markers, and spatial orientation of T-cells in relation to neuronal somata, were determined in TG tissue sections of five HSV-1-latently infected individuals by multiparametric in situ analysis. RESULTS Collagenase IV digestion of human nervous tissue was most optimal to obtain high numbers of viable T-cells without disrupting marker surface expression. Compared to blood, majority T-cells in paired NAWM and TG were effector memory T-cells expressing the canonical TRM markers CD69, CXCR6 and the immune checkpoint marker PD1, and about half co-expressed CD103. A trend of relatively higher TRM frequencies were detected in TG of latently HSV-1-infected compared to HSV-1 naïve individuals. Subsequent in situ analysis of latently HSV-1-infected TG showed the presence of cytotoxic T-cells (TIA-1+), which occasionally showed features of proliferation (KI-67+) and activation (CD137+), but without signs of degranulation (CD107a+) nor damage (TUNEL+) of TG cells. Whereas majority T-cells expressed PD-1, traits of T-cell senescence (p16INK4a+) were not detected. CONCLUSIONS The human TG represents an immunocompetent environment in which both CD4 and CD8 TRM are established and retained. Based on our study insights, we advocate for TRM-targeted vaccine strategies to bolster local HSV-1-specific T-cell immunity, not only at the site of recurrent infection but also at the site of HSV-1 latency.
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Affiliation(s)
- Peter-Paul A Unger
- Department of Viroscience, Erasmus MC, Molewaterplein 40, 3015 GD, Rotterdam, The Netherlands
| | - Anna E Oja
- Department of Hematopoiesis, Sanquin Research and Landsteiner Laboratory, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands
| | - Tamana Khemai-Mehraban
- Department of Viroscience, Erasmus MC, Molewaterplein 40, 3015 GD, Rotterdam, The Netherlands
| | - Werner J D Ouwendijk
- Department of Viroscience, Erasmus MC, Molewaterplein 40, 3015 GD, Rotterdam, The Netherlands
| | - Pleun Hombrink
- Department of Hematopoiesis, Sanquin Research and Landsteiner Laboratory, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands
| | - Georges M G M Verjans
- Department of Viroscience, Erasmus MC, Molewaterplein 40, 3015 GD, Rotterdam, The Netherlands.
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Sakakibara R, Sawai S, Ogata T. Varicella-zoster virus infection and autonomic dysfunction. Auton Neurosci 2022; 242:103018. [PMID: 35863181 DOI: 10.1016/j.autneu.2022.103018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Revised: 06/18/2022] [Accepted: 07/05/2022] [Indexed: 10/31/2022]
Abstract
BACKGROUND AND PURPOSE Autonomic dysfunction has been occasionally described in varicella-zoster virus (VZV) infection, while few systematic reviews are available. We systematically review autonomic dysfunction due to VZV infection. METHODS This study followed the PRISMA guideline, and three databases were researched and included cross-sectional studies in full-length publications in the English language using appropriate search keywords. RESULTS A total of 102 articles were identified initially; finally 45 studies were used for review, comprising pupillomotor dysfunction in 4, sudomotor dysfunction in 2, cardiovascular dysfunction in 2, gastrointestinal dysfunction in 14, and urogenital dysfunction in 23. They can be summarized as (1) VZV infection rarely produces orthostatic hypotension, which involves diffuse sympathetic dysfunction by polyneuropathy. (2) In contrast, VZV infection produces dysfunction of the bladder and the bowel, which involves segmental parasympathetic or sympathetic dysfunction by dorsal root ganglionopathy. CONCLUSIONS Awareness of VZV-related autonomic dysfunction is important, because such patients may first visit a gastroenterology or urology clinic. Close collaboration among neurologists, dermatologists, gastroenterologists, and urologists is important to start early antiviral agents and maximize bowel and bladder care in such patients.
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Affiliation(s)
- Ryuji Sakakibara
- Department of Neurology, Sakura Medical Center, Toho University, Sakura, Japan.
| | - Setsu Sawai
- Department of Neurology, Sakura Medical Center, Toho University, Sakura, Japan
| | - Tsuyoshi Ogata
- Department of Neurology, Sakura Medical Center, Toho University, Sakura, Japan
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LoRusso S. Infections of the Peripheral Nervous System. Continuum (Minneap Minn) 2021; 27:921-942. [PMID: 34623098 DOI: 10.1212/con.0000000000000981] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
PURPOSE OF REVIEW This article describes infections that affect the peripheral nervous system, including their clinical features, differential diagnoses, and treatments. RECENT FINDINGS Rates of pyomyositis have increased recently in the United States, possibly because of an increase in risk factors such as IV drug use, obesity, and diabetes. Other peripheral nervous system infections, such as diphtheria, have become more common in older patients secondary to a lack of revaccination or waning immunity. Although recommended treatment regimens for most infections remain unchanged over recent years, debate over the ideal dosing and route of administration continues for some infections such as tetanus and leprosy (Hansen disease). SUMMARY Infections of the peripheral nervous system are varied in terms of the type of infection, localization, and potential treatment. Nerve conduction studies and EMG can help determine localization, which is key to determining an initial differential diagnosis. It is important to recognize infections quickly to minimize diagnostic delays that could lead to patient morbidity and mortality.
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Current Concepts of Dentinal Hypersensitivity. J Endod 2021; 47:1696-1702. [PMID: 34302871 DOI: 10.1016/j.joen.2021.07.011] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2021] [Revised: 07/13/2021] [Accepted: 07/13/2021] [Indexed: 11/21/2022]
Abstract
INTRODUCTION Although many clinical studies have reported on the prevalence of dental pain, far fewer studies have focused on the mechanisms of dental pain. This is an important gap because increased understanding of dental pain mechanisms may lead to improved diagnostic tests or therapeutic interventions. The aim of this study was to comprehensively review the literature on the mechanisms of dentinal sensitivity. METHODS PubMed and Ovid were searched for articles that addressed dentinal pain and or pulpal sensitivity. Because of the breadth of research ranging from cellular/molecular studies to clinical trials, a narrative review on the mechanisms of dentinal sensitivity was constructed based on the literature. RESULTS Five various mechanisms for dentinal sensitivity have been proposed: (1) the classic hydrodynamic theory, (2) direct innervation of dentinal tubules, (3) neuroplasticity and sensitization of nociceptors, (4) odontoblasts serving as sensory receptors, and (5) algoneurons. CONCLUSIONS These theories are not mutually exclusive, and it is possible that several of them contribute to dentinal sensitivity. Moreover, pulpal responses to tissue injury may alter the relative contribution of these mechanisms. For example, pulpal inflammation may lead to neuronal sprouting and peripheral sensitization. Knowledge of these mechanisms may prompt the development of therapeutic drugs that aim to disrupt these mechanisms, leading to more effective treatments for pulpal pain.
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Camacho-Soto A, Faust I, Racette BA, Clifford DB, Checkoway H, Searles Nielsen S. Herpesvirus Infections and Risk of Parkinson's Disease. NEURODEGENER DIS 2021; 20:97-103. [PMID: 33461199 PMCID: PMC8552529 DOI: 10.1159/000512874] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2020] [Accepted: 11/08/2020] [Indexed: 11/09/2023] Open
Abstract
INTRODUCTION Herpesviruses might play a role in the pathogenesis of neurodegenerative disorders. We sought to examine a possible association between alpha herpesvirus infections and Parkinson's disease. METHODS We conducted a population-based case-control study of incident Parkinson's disease in 2009 Medicare beneficiaries age 66-90 years (89,790 cases, 118,095 randomly selected comparable controls). We classified beneficiaries with any diagnosis code for "herpes simplex" and/or "herpes zoster" in the previous 5 years as having had the respective alpha herpesviruses. In beneficiaries with Part D prescription coverage, we also identified those prescribed anti-herpetic medications. We calculated odds ratios (OR) and 95% CI between alpha herpesvirus diagnosis/treatment and Parkinson's disease with logistic regression, with adjustment for age, sex, race/ethnicity, smoking, and use of medical care. RESULTS Parkinson's disease risk was inversely associated with herpes simplex (OR 0.79, 95% CI 0.74-0.84), herpes zoster (OR 0.88, 95% CI 0.85-0.91), and anti-herpetic medications (OR 0.87, 95% CI 0.80-0.96). CONCLUSION Herpesvirus infection or treatment might reduce risk of Parkinson's disease, but future studies will be required to explore whether this inverse association is causal.
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Affiliation(s)
- Alejandra Camacho-Soto
- Department of Neurology, Washington University School of Medicine, St. Louis, Missouri, USA,
| | - Irene Faust
- Department of Neurology, Washington University School of Medicine, St. Louis, Missouri, USA
| | - Brad A Racette
- Department of Neurology, Washington University School of Medicine, St. Louis, Missouri, USA
- School of Public Health, Faculty of Health Sciences, University of the Witwatersrand, Parktown, South Africa
| | - David B Clifford
- Department of Neurology, Washington University School of Medicine, St. Louis, Missouri, USA
| | - Harvey Checkoway
- Department of Family Medicine and Public Health, University of California, San Diego, California, USA
- Department of Neurosciences, University of California, San Diego, California, USA
| | - Susan Searles Nielsen
- Department of Neurology, Washington University School of Medicine, St. Louis, Missouri, USA
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Soto JA, Gálvez NMS, Andrade CA, Pacheco GA, Bohmwald K, Berrios RV, Bueno SM, Kalergis AM. The Role of Dendritic Cells During Infections Caused by Highly Prevalent Viruses. Front Immunol 2020; 11:1513. [PMID: 32765522 PMCID: PMC7378533 DOI: 10.3389/fimmu.2020.01513] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2020] [Accepted: 06/09/2020] [Indexed: 12/12/2022] Open
Abstract
Dendritic cells (DCs) are a type of innate immune cells with major relevance in the establishment of an adaptive response, as they are responsible for the activation of lymphocytes. Since their discovery, several reports of their role during infectious diseases have been performed, highlighting their functions and their mechanisms of action. DCs can be categorized into different subsets, and each of these subsets expresses a wide arrange of receptors and molecules that aid them in the clearance of invading pathogens. Interferon (IFN) is a cytokine -a molecule of protein origin- strongly associated with antiviral immune responses. This cytokine is secreted by different cell types and is fundamental in the modulation of both innate and adaptive immune responses against viral infections. Particularly, DCs are one of the most important immune cells that produce IFN, with type I IFNs (α and β) highlighting as the most important, as they are associated with viral clearance. Type I IFN secretion can be induced via different pathways, activated by various components of the virus, such as surface proteins or genetic material. These molecules can trigger the activation of the IFN pathway trough surface receptors, including IFNAR, TLR4, or some intracellular receptors, such as TLR7, TLR9, and TLR3. Here, we discuss various types of dendritic cells found in humans and mice; their contribution to the activation of the antiviral response triggered by the secretion of IFN, through different routes of the induction for this important antiviral cytokine; and as to how DCs are involved in human infections that are considered highly frequent nowadays.
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Affiliation(s)
- Jorge A Soto
- Departamento de Genética Molecular y Microbiología, Facultad de Ciencias Biológicas, Instituto Milenio de Inmunología e Inmunoterapia, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Nicolas M S Gálvez
- Departamento de Genética Molecular y Microbiología, Facultad de Ciencias Biológicas, Instituto Milenio de Inmunología e Inmunoterapia, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Catalina A Andrade
- Departamento de Genética Molecular y Microbiología, Facultad de Ciencias Biológicas, Instituto Milenio de Inmunología e Inmunoterapia, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Gaspar A Pacheco
- Departamento de Genética Molecular y Microbiología, Facultad de Ciencias Biológicas, Instituto Milenio de Inmunología e Inmunoterapia, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Karen Bohmwald
- Departamento de Genética Molecular y Microbiología, Facultad de Ciencias Biológicas, Instituto Milenio de Inmunología e Inmunoterapia, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Roslye V Berrios
- Departamento de Genética Molecular y Microbiología, Facultad de Ciencias Biológicas, Instituto Milenio de Inmunología e Inmunoterapia, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Susan M Bueno
- Departamento de Genética Molecular y Microbiología, Facultad de Ciencias Biológicas, Instituto Milenio de Inmunología e Inmunoterapia, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Alexis M Kalergis
- Departamento de Genética Molecular y Microbiología, Facultad de Ciencias Biológicas, Instituto Milenio de Inmunología e Inmunoterapia, Pontificia Universidad Católica de Chile, Santiago, Chile.,Departamento de Endocrinología, Facultad de Medicina, Instituto Milenio de Inmunología e Inmunoterapia, Pontificia Universidad Católica de Chile, Santiago, Chile
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Qualitative Differences in Capsidless L-Particles Released as a By-Product of Bovine Herpesvirus 1 and Herpes Simplex Virus 1 Infections. J Virol 2018; 92:JVI.01259-18. [PMID: 30185590 PMCID: PMC6206470 DOI: 10.1128/jvi.01259-18] [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] [Received: 07/23/2018] [Accepted: 08/23/2018] [Indexed: 01/25/2023] Open
Abstract
The alphaherpesvirus family includes viruses that infect humans and animals. Hence, not only do they have a significant impact on human health, but they also have a substantial economic impact on the farming industry. While the pathogenic manifestations of the individual viruses differ from host to host, their relative genetic compositions suggest similarity at the molecular level. This study provides a side-by-side comparison of the particle outputs from the major human pathogen HSV-1 and the veterinary pathogen BoHV-1. Ultrastructural and proteomic analyses have revealed that both viruses have broadly similar morphogenesis profiles and infectious virus compositions. However, the demonstration that BoHV-1 has the capacity to generate vast numbers of capsidless enveloped particles that differ from those produced by HSV-1 in composition implies a divergence in the cell biology of these viruses that impacts our general understanding of alphaherpesvirus morphogenesis. Despite differences in the pathogenesis and host range of alphaherpesviruses, many stages of their morphogenesis are thought to be conserved. Here, an ultrastructural study of bovine herpesvirus 1 (BoHV-1) envelopment revealed profiles similar to those previously found for herpes simplex virus 1 (HSV-1), with BoHV-1 capsids associating with endocytic tubules. Consistent with the similarity of their genomes and envelopment strategies, the proteomic compositions of BoHV-1 and HSV-1 virions were also comparable. However, BoHV-1 morphogenesis exhibited a diversity in envelopment events. First, heterogeneous primary envelopment profiles were readily detectable at the inner nuclear membrane of BoHV-1-infected cells. Second, the BoHV-1 progeny comprised not just full virions but also an abundance of capsidless, noninfectious light particles (L-particles) that were released from the infected cells in numbers similar to those of virions and in the absence of DNA replication. Proteomic analysis of BoHV-1 L-particles and the much less abundant HSV-1 L-particles revealed that they contained the same complement of envelope proteins as virions but showed variations in tegument content. In the case of HSV-1, the UL46 tegument protein was reproducibly found to be >6-fold enriched in HSV-1 L-particles. More strikingly, the tegument proteins UL36, UL37, UL21, and UL16 were depleted in BoHV-1 but not HSV-1 L-particles. We propose that these combined differences reflect the presence of truly segregated “inner” and “outer” teguments in BoHV-1, making it a critical system for studying the structure and process of tegumentation and envelopment. IMPORTANCE The alphaherpesvirus family includes viruses that infect humans and animals. Hence, not only do they have a significant impact on human health, but they also have a substantial economic impact on the farming industry. While the pathogenic manifestations of the individual viruses differ from host to host, their relative genetic compositions suggest similarity at the molecular level. This study provides a side-by-side comparison of the particle outputs from the major human pathogen HSV-1 and the veterinary pathogen BoHV-1. Ultrastructural and proteomic analyses have revealed that both viruses have broadly similar morphogenesis profiles and infectious virus compositions. However, the demonstration that BoHV-1 has the capacity to generate vast numbers of capsidless enveloped particles that differ from those produced by HSV-1 in composition implies a divergence in the cell biology of these viruses that impacts our general understanding of alphaherpesvirus morphogenesis.
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Löhr M. Pennington et al.: First demonstration of equid gammaherpesviruses within the gastric mucosal epithelium of horses. Virus Research volume 242, 15 October 2017, pages 30-36. Virus Res 2018; 244:116. [PMID: 29155032 DOI: 10.1016/j.virusres.2017.11.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Matthias Löhr
- Department for Clinical Science, Intervention and Technology, Technology, Karolinska Institutet, Stockholm, Sweden.
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11
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Mangus LM, Dorsey JL, Weinberg RL, Ebenezer GJ, Hauer P, Laast VA, Mankowski JL. Tracking Epidermal Nerve Fiber Changes in Asian Macaques: Tools and Techniques for Quantitative Assessment. Toxicol Pathol 2016; 44:904-12. [PMID: 27235324 PMCID: PMC4965306 DOI: 10.1177/0192623316650286] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Quantitative assessment of epidermal nerve fibers (ENFs) has become a widely used clinical tool for the diagnosis of small fiber neuropathies such as diabetic neuropathy and human immunodeficiency virus-associated sensory neuropathy (HIV-SN). To model and investigate the pathogenesis of HIV-SN using simian immunodeficiency virus (SIV)-infected Asian macaques, we adapted the skin biopsy and immunostaining techniques currently employed in human patients and then developed two unbiased image analysis techniques for quantifying ENF in macaque footpad skin. This report provides detailed descriptions of these tools and techniques for ENF assessment in macaques and outlines important experimental considerations that we have identified in the course of our long-term studies. Although initially developed for studies of HIV-SN in the SIV-infected macaque model, these methods could be readily translated to a range of studies involving peripheral nerve degeneration and neurotoxicity in nonhuman primates as well as preclinical investigations of agents aimed at neuroprotection and regeneration.
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Affiliation(s)
- Lisa M Mangus
- Department of Molecular and Comparative Pathobiology, School of Medicine, Johns Hopkins University, Baltimore, Maryland, USA
| | - Jamie L Dorsey
- Department of Molecular and Comparative Pathobiology, School of Medicine, Johns Hopkins University, Baltimore, Maryland, USA
| | - Rachel L Weinberg
- Department of Molecular and Comparative Pathobiology, School of Medicine, Johns Hopkins University, Baltimore, Maryland, USA
| | - Gigi J Ebenezer
- Department of Neurology, School of Medicine, Johns Hopkins University, Baltimore, Maryland, USA
| | - Peter Hauer
- Department of Neurology, School of Medicine, Johns Hopkins University, Baltimore, Maryland, USA Current Affiliation: Department of Neurology, School of Medicine, University of Utah, Salt Lake City, Utah, USA
| | - Victoria A Laast
- Department of Molecular and Comparative Pathobiology, School of Medicine, Johns Hopkins University, Baltimore, Maryland, USA Current Affiliation: Covance Pharmaceutical Research and Development (Shanghai) Co. Ltd., Shanghai, China
| | - Joseph L Mankowski
- Department of Molecular and Comparative Pathobiology, School of Medicine, Johns Hopkins University, Baltimore, Maryland, USA Department of Neurology, School of Medicine, Johns Hopkins University, Baltimore, Maryland, USA Department of Pathology, School of Medicine, Johns Hopkins University, Baltimore, Maryland, USA
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Clementi N, Criscuolo E, Cappelletti F, Burioni R, Clementi M, Mancini N. Novel therapeutic investigational strategies to treat severe and disseminated HSV infections suggested by a deeper understanding of in vitro virus entry processes. Drug Discov Today 2016; 21:682-91. [PMID: 26976690 DOI: 10.1016/j.drudis.2016.03.003] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2015] [Revised: 02/11/2016] [Accepted: 03/04/2016] [Indexed: 01/28/2023]
Abstract
The global burden of herpes simplex virus (HSV) legitimates the critical need to develop new prevention strategies, such as drugs and vaccines that are able to fight either primary HSV infections or reactivations. Moreover, the ever-growing number of patients receiving transplants increases the number of severe HSV infections that are unresponsive to current therapies. Finally, the high global incidence of genital HSV-2 infection increases the risk of perinatal transmission to newborns, in which disseminated infection or central nervous system (CNS) involvement is frequent, with associated high morbidity and mortality rates. There are several key features shared by novel anti-HSV drugs, from currently available optimized drugs to small molecules able to interfere with various virus replication steps. However, several virological aspects of the disease and associated clinical needs highlight why an ideal anti-HSV drug has yet to be developed.
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Affiliation(s)
- Nicola Clementi
- Microbiology and Virology Unit, 'Vita-Salute San Raffaele' University, 20132 Milan, Italy.
| | - Elena Criscuolo
- Microbiology and Virology Unit, 'Vita-Salute San Raffaele' University, 20132 Milan, Italy
| | - Francesca Cappelletti
- Microbiology and Virology Unit, 'Vita-Salute San Raffaele' University, 20132 Milan, Italy
| | - Roberto Burioni
- Microbiology and Virology Unit, 'Vita-Salute San Raffaele' University, 20132 Milan, Italy
| | - Massimo Clementi
- Microbiology and Virology Unit, 'Vita-Salute San Raffaele' University, 20132 Milan, Italy
| | - Nicasio Mancini
- Microbiology and Virology Unit, 'Vita-Salute San Raffaele' University, 20132 Milan, Italy
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Transcriptome Analysis of Chemically-Induced Sensory Neuron Ablation in Zebrafish. PLoS One 2016; 11:e0148726. [PMID: 26863206 PMCID: PMC4749159 DOI: 10.1371/journal.pone.0148726] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2015] [Accepted: 01/22/2016] [Indexed: 12/31/2022] Open
Abstract
Peripheral glia are known to have a critical role in the initial response to axon damage and degeneration. However, little is known about the cellular responses of non-myelinating glia to nerve injury. In this study, we analyzed the transcriptomes of wild-type and mutant (lacking peripheral glia) zebrafish larvae that were treated with metronidazole. This treatment allowed us to conditionally and selectively ablate cranial sensory neurons whose axons are ensheathed only by non-myelinating glia. While transcripts representing over 27,000 genes were detected by RNAseq, only a small fraction (~1% of genes) were found to be differentially expressed in response to neuronal degeneration in either line at either 2 hrs or 5 hrs of metronidazole treatment. Analysis revealed that most expression changes (332 out of the total of 458 differentially expressed genes) occurred over a continuous period (from 2 to 5 hrs of metronidazole exposure), with a small number of genes showing changes limited to only the 2 hr (55 genes) or 5 hr (71 genes) time points. For genes with continuous alterations in expression, some of the most meaningful sets of enriched categories in the wild-type line were those involving the inflammatory TNF-alpha and IL6 signaling pathways, oxidoreductase activities and response to stress. Intriguingly, these changes were not observed in the mutant line. Indeed, cluster analysis indicated that the effects of metronidazole treatment on gene expression was heavily influenced by the presence or absence of glia, indicating that the peripheral non-myelinating glia play a significant role in the transcriptional response to sensory neuron degeneration. This is the first transcriptome study of metronidazole-induced neuronal death in zebrafish and the response of non-myelinating glia to sensory neuron degeneration. We believe this study provides important insight into the mechanisms by which non-myelinating glia react to neuronal death and degeneration in sensory circuits.
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Panatto D, Bragazzi NL, Rizzitelli E, Bonanni P, Boccalini S, Icardi G, Gasparini R, Amicizia D. Evaluation of the economic burden of Herpes Zoster (HZ) infection. Hum Vaccin Immunother 2015; 11:245-62. [PMID: 25483704 DOI: 10.4161/hv.36160] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
The main objective of this systematic review was to evaluate the economic burden of Herpes Zoster (HZ) infection. The review was conducted in accordance with the standards of the "Preferred Reporting Items for Systematic Reviews and Meta-Analyses" guidelines. The following databases were accessed: ISI/Web of Knowledge (WoS), MEDLINE/PubMed, Scopus, ProQuest, the Cochrane Library and EconLit. Specific literature on health economics was also manually inspected. Thirty-three studies were included. The quality of the studies assessed in accordance with the Consolidated Health Economic Evaluation Reporting Standards checklist was good. All studies evaluated direct costs, apart from one which dealt only with indirect costs. Indirect costs were evaluated by 12 studies. The economic burden of HZ has increased over time. HZ management and drug prescriptions generate the highest direct costs. While increasing age, co-morbidities and drug treatment were found to predict higher direct costs, being employed was correlated with higher indirect costs, and thus with the onset age of the disease. Despite some differences among the selected studies, particularly with regard to indirect costs, all concur that HZ is a widespread disease which has a heavy social and economic burden.
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Abstract
Infectious causes of peripheral nervous system (PNS) disease are underrecognized but potentially treatable. Heightened awareness educed by advanced understanding of the presentations and management of these infections can aid diagnosis and facilitate treatment. In this review, we discuss the clinical manifestations, diagnosis, and treatment of common bacterial, viral, and parasitic infections that affect the PNS. We additionally detail PNS side effects of some frequently used antimicrobial agents.
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Affiliation(s)
- Kate T. Brizzi
- Massachusetts General Hospital, Brigham and Women’s Hospital, and Harvard Medical School, Boston, MA, USA
| | - Jennifer L. Lyons
- Brigham and Women’s Hospital and Harvard Medical School, Boston, MA, USA
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Fan F, Day S, Lu X, Tang YW. Laboratory diagnosis of HSV and varicella zoster virus infections. Future Virol 2014. [DOI: 10.2217/fvl.14.61] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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The herpes virus Fc receptor gE-gI mediates antibody bipolar bridging to clear viral antigens from the cell surface. PLoS Pathog 2014; 10:e1003961. [PMID: 24604090 PMCID: PMC3946383 DOI: 10.1371/journal.ppat.1003961] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2013] [Accepted: 01/16/2014] [Indexed: 11/19/2022] Open
Abstract
The Herpes Simplex Virus 1 (HSV-1) glycoprotein gE-gI is a transmembrane Fc receptor found on the surface of infected cells and virions that binds human immunoglobulin G (hIgG). gE-gI can also participate in antibody bipolar bridging (ABB), a process by which the antigen-binding fragments (Fabs) of the IgG bind a viral antigen while the Fc binds to gE-gI. IgG Fc binds gE-gI at basic, but not acidic, pH, suggesting that IgG bound at extracellular pH by cell surface gE-gI would dissociate and be degraded in acidic endosomes/lysosomes if endocytosed. The fate of viral antigens associated with gE-gI-bound IgG had been unknown: they could remain at the cell surface or be endocytosed with IgG. Here, we developed an in vitro model system for ABB and investigated the trafficking of ABB complexes using 4-D confocal fluorescence imaging of ABB complexes with transferrin or epidermal growth factor, well-characterized intracellular trafficking markers. Our data showed that cells expressing gE-gI and the viral antigen HSV-1 gD endocytosed anti-gD IgG and gD in a gE-gI-dependent process, resulting in lysosomal localization. These results suggest that gE-gI can mediate clearance of infected cell surfaces of anti-viral host IgG and viral antigens to evade IgG-mediated responses, representing a general mechanism for viral Fc receptors in immune evasion and viral pathogenesis.
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