1
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Dai Y, Idorn M, Serrero MC, Pan X, Thomsen EA, Narita R, Maimaitili M, Qian X, Iversen MB, Reinert LS, Flygaard RK, Chen M, Ding X, Zhang BC, Carter-Timofte ME, Lu Q, Jiang Z, Zhong Y, Zhang S, Da L, Zhu J, Denham M, Nissen P, Mogensen TH, Mikkelsen JG, Zhang SY, Casanova JL, Cai Y, Paludan SR. TMEFF1 is a neuron-specific restriction factor for herpes simplex virus. Nature 2024; 632:383-389. [PMID: 39048823 DOI: 10.1038/s41586-024-07670-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2022] [Accepted: 06/04/2024] [Indexed: 07/27/2024]
Abstract
The brain is highly sensitive to damage caused by infection and inflammation1,2. Herpes simplex virus 1 (HSV-1) is a neurotropic virus and the cause of herpes simplex encephalitis3. It is unknown whether neuron-specific antiviral factors control virus replication to prevent infection and excessive inflammatory responses, hence protecting the brain. Here we identify TMEFF1 as an HSV-1 restriction factor using genome-wide CRISPR screening. TMEFF1 is expressed specifically in neurons of the central nervous system and is not regulated by type I interferon, the best-known innate antiviral system controlling virus infections. Depletion of TMEFF1 in stem-cell-derived human neurons led to elevated viral replication and neuronal death following HSV-1 infection. TMEFF1 blocked the HSV-1 replication cycle at the level of viral entry through interactions with nectin-1 and non-muscle myosin heavy chains IIA and IIB, which are core proteins in virus-cell binding and virus-cell fusion, respectively4-6. Notably, Tmeff1-/- mice exhibited increased susceptibility to HSV-1 infection in the brain but not in the periphery. Within the brain, elevated viral load was observed specifically in neurons. Our study identifies TMEFF1 as a neuron-specific restriction factor essential for prevention of HSV-1 replication in the central nervous system.
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Affiliation(s)
- Yao Dai
- Key Laboratory of Systems Biomedicine (Ministry of Education), Shanghai Center for Systems Biomedicine, Shanghai Jiao Tong University, Shanghai, China
| | - Manja Idorn
- Department of Biomedicine, Aarhus University, Aarhus, Denmark
- Center for Immunology of Viral Infections, Aarhus, Denmark
| | - Manutea C Serrero
- Department of Biomedicine, Aarhus University, Aarhus, Denmark
- Center for Immunology of Viral Infections, Aarhus, Denmark
| | - Xiaoyong Pan
- Key Laboratory of System Control and Information Processing (Ministry of Education), Institute of Image Processing and Pattern Recognition, Shanghai Jiao Tong University, Shanghai, China
| | - Emil A Thomsen
- Department of Biomedicine, Aarhus University, Aarhus, Denmark
- Center for Immunology of Viral Infections, Aarhus, Denmark
| | - Ryo Narita
- Department of Biomedicine, Aarhus University, Aarhus, Denmark
- Center for Immunology of Viral Infections, Aarhus, Denmark
| | - Muyesier Maimaitili
- Department of Biomedicine, Aarhus University, Aarhus, Denmark
- Center for Immunology of Viral Infections, Aarhus, Denmark
| | - Xiaoqing Qian
- School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China
| | - Marie B Iversen
- Department of Biomedicine, Aarhus University, Aarhus, Denmark
- Center for Immunology of Viral Infections, Aarhus, Denmark
| | - Line S Reinert
- Department of Biomedicine, Aarhus University, Aarhus, Denmark
- Center for Immunology of Viral Infections, Aarhus, Denmark
| | - Rasmus K Flygaard
- Department of Molecular Biology and Genetics, Aarhus University, Aarhus, Denmark
| | - Muwan Chen
- Department of Biomedicine, Aarhus University, Aarhus, Denmark
- Center for Immunology of Viral Infections, Aarhus, Denmark
- Danish Research Institute of Translational Neuroscience, Nordic EMBL Partnership for Molecular Medicine, Aarhus University, Aarhus, Denmark
| | - Xiangning Ding
- Department of Biomedicine, Aarhus University, Aarhus, Denmark
- Center for Immunology of Viral Infections, Aarhus, Denmark
| | - Bao-Cun Zhang
- Department of Biomedicine, Aarhus University, Aarhus, Denmark
- Center for Immunology of Viral Infections, Aarhus, Denmark
| | - Madalina E Carter-Timofte
- Department of Biomedicine, Aarhus University, Aarhus, Denmark
- Center for Immunology of Viral Infections, Aarhus, Denmark
| | - Qing Lu
- Key Laboratory for the Genetics of Developmental and Neuropsychiatric Disorders, Ministry of Education, Bio-X Institutes, Shanghai Jiao Tong University, Shanghai, China
| | - Zhuofan Jiang
- Key Laboratory of Systems Biomedicine (Ministry of Education), Shanghai Center for Systems Biomedicine, Shanghai Jiao Tong University, Shanghai, China
| | - Yiye Zhong
- Key Laboratory of Systems Biomedicine (Ministry of Education), Shanghai Center for Systems Biomedicine, Shanghai Jiao Tong University, Shanghai, China
| | - Shuhui Zhang
- Key Laboratory of Systems Biomedicine (Ministry of Education), Shanghai Center for Systems Biomedicine, Shanghai Jiao Tong University, Shanghai, China
| | - Lintai Da
- Key Laboratory of Systems Biomedicine (Ministry of Education), Shanghai Center for Systems Biomedicine, Shanghai Jiao Tong University, Shanghai, China
| | - Jinwei Zhu
- Key Laboratory for the Genetics of Developmental and Neuropsychiatric Disorders, Ministry of Education, Bio-X Institutes, Shanghai Jiao Tong University, Shanghai, China
| | - Mark Denham
- Department of Biomedicine, Aarhus University, Aarhus, Denmark
- Danish Research Institute of Translational Neuroscience, Nordic EMBL Partnership for Molecular Medicine, Aarhus University, Aarhus, Denmark
| | - Poul Nissen
- Department of Molecular Biology and Genetics, Aarhus University, Aarhus, Denmark
- Danish Research Institute of Translational Neuroscience, Nordic EMBL Partnership for Molecular Medicine, Aarhus University, Aarhus, Denmark
| | - Trine H Mogensen
- Department of Biomedicine, Aarhus University, Aarhus, Denmark
- Center for Immunology of Viral Infections, Aarhus, Denmark
- Department of Infectious Diseases, Aarhus University Hospital, Aarhus, Denmark
| | - Jacob Giehm Mikkelsen
- Department of Biomedicine, Aarhus University, Aarhus, Denmark
- Center for Immunology of Viral Infections, Aarhus, Denmark
| | - Shen-Ying Zhang
- University of Paris, Imagine Institute, Paris, France
- St. Giles Laboratory of Human Genetics of Infectious Diseases, The Rockefeller University, New York, NY, USA
| | - Jean-Laurent Casanova
- University of Paris, Imagine Institute, Paris, France
- St. Giles Laboratory of Human Genetics of Infectious Diseases, The Rockefeller University, New York, NY, USA
- Laboratory of Human Genetics of Infectious Diseases, INSERM U1163, Necker Hospital for Sick Children, Paris, France
- Howard Hughes Medical Institute, New York, NY, USA
| | - Yujia Cai
- Key Laboratory of Systems Biomedicine (Ministry of Education), Shanghai Center for Systems Biomedicine, Shanghai Jiao Tong University, Shanghai, China.
- Department of Biomedicine, Aarhus University, Aarhus, Denmark.
| | - Søren R Paludan
- Department of Biomedicine, Aarhus University, Aarhus, Denmark.
- Center for Immunology of Viral Infections, Aarhus, Denmark.
- Department of Rheumatology and Inflammation Research, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Göteborg, Sweden.
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2
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Renner DW, Parsons L, Shreve JT, Engel EA, Kuny CV, Enquist L, Neumann D, Mangold C, Szpara ML. Genome Sequence of the Virulent Model Herpes Simplex Virus 1 Strain McKrae Demonstrates the Presence of at Least Two Widely Used Variant Strains. Microbiol Resour Announc 2021; 10:e01146-19. [PMID: 33766904 PMCID: PMC7996463 DOI: 10.1128/mra.01146-19] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2019] [Accepted: 03/03/2021] [Indexed: 02/07/2023] Open
Abstract
Herpes simplex virus 1 (HSV-1) strain McKrae was isolated in 1965 and has been utilized by many laboratories. Three HSV-1 strain McKrae stocks have been sequenced previously, revealing discrepancies in key genes. We sequenced the genome of HSV-1 strain McKrae from the laboratory of James M. Hill to better understand the genetic differences between isolates.
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Affiliation(s)
- Daniel W Renner
- Department of Biology, Pennsylvania State University, University Park, Pennsylvania, USA
- Department of Biochemistry and Molecular Biology, Center for Infectious Disease Dynamics, Huck Institutes of the Life Sciences, Pennsylvania State University, University Park, Pennsylvania, USA
| | - Lance Parsons
- Lewis-Sigler Institute for Integrative Genomics, Princeton University, Princeton, New Jersey, USA
| | - Jacob T Shreve
- Department of Biochemistry and Molecular Biology, Center for Infectious Disease Dynamics, Huck Institutes of the Life Sciences, Pennsylvania State University, University Park, Pennsylvania, USA
| | - Esteban A Engel
- Princeton Neuroscience Institute, Princeton University, Princeton, New Jersey, USA
| | - Chad V Kuny
- Department of Biology, Pennsylvania State University, University Park, Pennsylvania, USA
- Department of Biochemistry and Molecular Biology, Center for Infectious Disease Dynamics, Huck Institutes of the Life Sciences, Pennsylvania State University, University Park, Pennsylvania, USA
| | - Lynn Enquist
- Department of Molecular Biology, Princeton University, Princeton, New Jersey, USA
| | - Donna Neumann
- Department of Ophthalmology and Visual Sciences, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin, USA
| | - Colleen Mangold
- Department of Biology, Pennsylvania State University, University Park, Pennsylvania, USA
- Department of Entomology, Pennsylvania State University, University Park, Pennsylvania, USA
| | - Moriah L Szpara
- Department of Biology, Pennsylvania State University, University Park, Pennsylvania, USA
- Department of Biochemistry and Molecular Biology, Center for Infectious Disease Dynamics, Huck Institutes of the Life Sciences, Pennsylvania State University, University Park, Pennsylvania, USA
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3
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Vanni EAH, Foley JW, Davison AJ, Sommer M, Liu D, Sung P, Moffat J, Zerboni L, Arvin AM. The latency-associated transcript locus of herpes simplex virus 1 is a virulence determinant in human skin. PLoS Pathog 2020; 16:e1009166. [PMID: 33370402 PMCID: PMC7794027 DOI: 10.1371/journal.ppat.1009166] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2020] [Revised: 01/08/2021] [Accepted: 11/12/2020] [Indexed: 12/11/2022] Open
Abstract
Herpes simplex virus 1 (HSV-1) infects skin and mucosal epithelial cells and then travels along axons to establish latency in the neurones of sensory ganglia. Although viral gene expression is restricted during latency, the latency-associated transcript (LAT) locus encodes many RNAs, including a 2 kb intron known as the hallmark of HSV-1 latency. Here, we studied HSV-1 infection and the role of the LAT locus in human skin xenografts in vivo and in cultured explants. We sequenced the genomes of our stock of HSV-1 strain 17syn+ and seven derived viruses and found nonsynonymous mutations in many viral proteins that had no impact on skin infection. In contrast, deletions in the LAT locus severely impaired HSV-1 replication and lesion formation in skin. However, skin replication was not affected by impaired intron splicing. Moreover, although the LAT locus has been implicated in regulating gene expression in neurones, we observed only small changes in transcript levels that were unrelated to the growth defect in skin, suggesting that its functions in skin may be different from those in neurones. Thus, although the LAT locus was previously thought to be dispensable for lytic infection, we show that it is a determinant of HSV-1 virulence during lytic infection of human skin. Herpes simplex virus type 1 (HSV-1) infects and destroys the outer layer of skin cells, producing lesions known as cold sores. Although these lesions heal, the virus persists in the host for the lifetime and can reactivate to cause new lesions. This is possible because the virus enters the axons of neurones in the skin and moves to their cell bodies located in spinal or cranial nerve bundles called ganglia, where the virus becomes dormant (latent). The most abundant viral RNAs expressed during this state are the latency associated transcripts (LATs), which have been considered a hallmark of HSV-1 latency. Here, we studied HSV-1 infection and spread in human skin. Unexpectedly, we found that the LAT locus is necessary for lesion formation in skin. HSV-1 viruses that were genetically mutated to delete the start of the locus could not spread in skin, whereas viruses with many other genetic mutations had this capacity. Our results suggest that an antiviral drug that inhibits transcripts from this region of the viral genome could block viral spread in skin, or a vaccine could possibly be produced by genetically modifying the virus at the LAT locus and by doing so, limit the virus’ ability become latent in neurones.
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Affiliation(s)
- Emilia A. H. Vanni
- Departments of Pediatrics and Microbiology and Immunology, Stanford University School of Medicine, Stanford, California, United States of America
- * E-mail:
| | - Joseph W. Foley
- Department of Pathology, Stanford University School of Medicine, Stanford, California, United States of America
| | - Andrew J. Davison
- MRC-University of Glasgow Centre for Virus Research, Glasgow, United Kingdom
| | - Marvin Sommer
- Departments of Pediatrics and Microbiology and Immunology, Stanford University School of Medicine, Stanford, California, United States of America
| | - Dongmei Liu
- Department of Microbiology and Immunology, State University of New York-Upstate Medical University, Syracuse, New York, United States of America
| | - Phillip Sung
- Departments of Pediatrics and Microbiology and Immunology, Stanford University School of Medicine, Stanford, California, United States of America
| | - Jennifer Moffat
- Department of Microbiology and Immunology, State University of New York-Upstate Medical University, Syracuse, New York, United States of America
| | - Leigh Zerboni
- Departments of Pediatrics and Microbiology and Immunology, Stanford University School of Medicine, Stanford, California, United States of America
| | - Ann M. Arvin
- Departments of Pediatrics and Microbiology and Immunology, Stanford University School of Medicine, Stanford, California, United States of America
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4
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Barrozo ER, Nakayama S, Singh P, Vanni EAH, Arvin AM, Neumann DM, Bloom DC. Deletion of Herpes Simplex Virus 1 MicroRNAs miR-H1 and miR-H6 Impairs Reactivation. J Virol 2020; 94:e00639-20. [PMID: 32295910 PMCID: PMC7375377 DOI: 10.1128/jvi.00639-20] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2020] [Accepted: 04/07/2020] [Indexed: 12/13/2022] Open
Abstract
During all stages of infection, herpes simplex virus 1 (HSV-1) expresses viral microRNAs (miRNAs). There are at least 20 confirmed HSV-1 miRNAs, yet the roles of individual miRNAs in the context of viral infection remain largely uncharacterized. We constructed a recombinant virus lacking the sequences for miR-H1-5p and miR-H6-3p (17dmiR-H1/H6). The seed sequences for these miRNAs are antisense to each other and are transcribed from divergent noncoding RNAs in the latency-associated transcript (LAT) promoter region. Comparing phenotypes exhibited by the recombinant virus lacking these miRNAs to the wild type (17syn+), we found that during acute infection in cell culture, 17dmiR-H1/H6 exhibited a modest increase in viral yields. Analysis of pathogenesis in the mouse following footpad infection revealed a slight increase in virulence for 17dmiR-H1/H6 but no significant difference in the establishment or maintenance of latency. Strikingly, explant of latently infected dorsal root ganglia revealed a decreased and delayed reactivation phenotype. Further, 17dmiR-H1/H6 was severely impaired in epinephrine-induced reactivation in the rabbit ocular model. Finally, we demonstrated that deletion of miR-H1/H6 increased the accumulation of the LAT as well as several of the LAT region miRNAs. These results suggest that miR-H1/H6 plays an important role in facilitating efficient reactivation from latency.IMPORTANCE While HSV antivirals reduce the severity and duration of clinical disease in some individuals, there is no vaccine or cure. Therefore, understanding the mechanisms regulating latency and reactivation as a potential to elucidate targets for better therapeutics is important. There are at least 20 confirmed HSV-1 miRNAs, yet the roles of individual miRNAs in the context of viral infection remain largely uncharacterized. The present study focuses on two of the miRNAs (miR-H1/H6) that are encoded within the latency-associated transcript (LAT) region, a portion of the genome that has been associated with efficient reactivation. Here, we demonstrate that the deletion of the seed sequences of these miRNAs results in a severe reduction in reactivation of HSV-1 in the mouse and rabbit models. These results suggest a linkage between these miRNAs and reactivation.
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Affiliation(s)
- Enrico R Barrozo
- Department of Molecular Genetics & Microbiology, University of Florida College of Medicine, Gainesville, Florida, USA
- UF Genetics Institute, University of Florida, Gainesville, Florida, USA
| | - Sanae Nakayama
- Department of Molecular Genetics & Microbiology, University of Florida College of Medicine, Gainesville, Florida, USA
| | - Pankaj Singh
- Department of Ophthalmology and Visual Sciences, University of Wisconsin-Madison, Madison, Wisconsin, USA
| | - Emilia A H Vanni
- Department of Pediatrics, Stanford University School of Medicine, Stanford, California, USA
- Department of Microbiology and Immunology, Stanford University School of Medicine, Stanford, California, USA
| | - Ann M Arvin
- Department of Pediatrics, Stanford University School of Medicine, Stanford, California, USA
- Department of Microbiology and Immunology, Stanford University School of Medicine, Stanford, California, USA
| | - Donna M Neumann
- Department of Ophthalmology and Visual Sciences, University of Wisconsin-Madison, Madison, Wisconsin, USA
| | - David C Bloom
- Department of Molecular Genetics & Microbiology, University of Florida College of Medicine, Gainesville, Florida, USA
- UF Genetics Institute, University of Florida, Gainesville, Florida, USA
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5
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Akhtar LN, Bowen CD, Renner DW, Pandey U, Della Fera AN, Kimberlin DW, Prichard MN, Whitley RJ, Weitzman MD, Szpara ML. Genotypic and Phenotypic Diversity of Herpes Simplex Virus 2 within the Infected Neonatal Population. mSphere 2019; 4:e00590-18. [PMID: 30814317 PMCID: PMC6393728 DOI: 10.1128/msphere.00590-18] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2018] [Accepted: 02/04/2019] [Indexed: 12/16/2022] Open
Abstract
More than 14,000 neonates are infected with herpes simplex virus (HSV) annually. Approximately half display manifestations limited to the skin, eyes, or mouth (SEM disease). The rest develop invasive infections that spread to the central nervous system (CNS disease or encephalitis) or throughout the infected neonate (disseminated disease). Invasive HSV disease is associated with significant morbidity and mortality, but the viral and host factors that predispose neonates to these forms are unknown. To define viral diversity within the infected neonatal population, we evaluated 10 HSV-2 isolates from newborns with a range of clinical presentations. To assess viral fitness independently of host immune factors, we measured viral growth characteristics in cultured cells and found diverse in vitro phenotypes. Isolates from neonates with CNS disease were associated with larger plaque size and enhanced spread, with the isolates from cerebrospinal fluid (CSF) exhibiting the most robust growth. We sequenced complete viral genomes of all 10 neonatal viruses, providing new insights into HSV-2 genomic diversity in this clinical setting. We found extensive interhost and intrahost genomic diversity throughout the viral genome, including amino acid differences in more than 90% of the viral proteome. The genes encoding glycoprotein G (gG; US4), glycoprotein I (gI; US7), and glycoprotein K (gK; UL53) and viral proteins UL8, UL20, UL24, and US2 contained variants that were found in association with CNS isolates. Many of these viral proteins are known to contribute to cell spread and neurovirulence in mouse models of CNS disease. This report represents the first application of comparative pathogen genomics to neonatal HSV disease.IMPORTANCE Herpes simplex virus (HSV) causes invasive disease in half of infected neonates, resulting in significant mortality and permanent cognitive morbidity. The factors that contribute to invasive disease are not understood. This study revealed diversity among HSV isolates from infected neonates and detected the first associations between viral genetic variations and clinical disease manifestations. We found that viruses isolated from newborns with encephalitis showed enhanced spread in culture. These viruses contained protein-coding variations not found in viruses causing noninvasive disease. Many of these variations were found in proteins known to impact neurovirulence and viral spread between cells. This work advances our understanding of HSV diversity in the neonatal population and how it may impact disease outcome.
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Affiliation(s)
- Lisa N Akhtar
- Department of Pediatrics, Division of Infectious Diseases, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, USA
- University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania, USA
| | - Christopher D Bowen
- Department of Biochemistry and Molecular Biology, Center for Infectious Disease Dynamics, The Huck Institutes of the Life Sciences, Pennsylvania State University, State College, Pennsylvania, USA
| | - Daniel W Renner
- Department of Biochemistry and Molecular Biology, Center for Infectious Disease Dynamics, The Huck Institutes of the Life Sciences, Pennsylvania State University, State College, Pennsylvania, USA
| | - Utsav Pandey
- Department of Biochemistry and Molecular Biology, Center for Infectious Disease Dynamics, The Huck Institutes of the Life Sciences, Pennsylvania State University, State College, Pennsylvania, USA
| | - Ashley N Della Fera
- Department of Pathology and Laboratory Medicine, Division of Protective Immunity and Division of Cancer Pathobiology, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, USA
| | - David W Kimberlin
- Department of Pediatrics, Division of Infectious Diseases, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Mark N Prichard
- Department of Pediatrics, Division of Infectious Diseases, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Richard J Whitley
- Department of Pediatrics, Division of Infectious Diseases, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Matthew D Weitzman
- Department of Pathology and Laboratory Medicine, Division of Protective Immunity and Division of Cancer Pathobiology, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, USA
- University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania, USA
| | - Moriah L Szpara
- Department of Biochemistry and Molecular Biology, Center for Infectious Disease Dynamics, The Huck Institutes of the Life Sciences, Pennsylvania State University, State College, Pennsylvania, USA
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6
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Pandey U, Renner DW, Thompson RL, Szpara ML, Sawtell NM. Inferred father-to-son transmission of herpes simplex virus results in near-perfect preservation of viral genome identity and in vivo phenotypes. Sci Rep 2017; 7:13666. [PMID: 29057909 PMCID: PMC5654476 DOI: 10.1038/s41598-017-13936-6] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2017] [Accepted: 10/02/2017] [Indexed: 12/23/2022] Open
Abstract
High throughout sequencing has provided an unprecedented view of the circulating diversity of all classes of human herpesviruses. For herpes simplex virus 1 (HSV-1), we and others have previously published data demonstrating sequence diversity between hosts. However the extent of variation during transmission events, or in one host over years of chronic infection, remain unknown. Here we present an initial example of full characterization of viruses isolated from a father to son transmission event. The likely occasion of transmission occurred 17 years before the strains were isolated, enabling a first view of the degree of virus conservation after decades of recurrences, including transmission and adaptation to a new host. We have characterized the pathogenicity of these strains in a mouse ocular model of infection, and sequenced the full viral genomes. Surprisingly, we find that these two viruses have preserved their phenotype and genotype nearly perfectly during inferred transmission from father to son, and during nearly two decades of episodes of recurrent disease in each human host. Given the close genetic relationship of these two hosts, it remains to be seen whether or not this conservation of sequence will occur during non-familial transmission events.
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Affiliation(s)
- Utsav Pandey
- Department of Biochemistry and Molecular Biology, Center for Infectious Disease Dynamics, and the Huck Institutes of the Life Sciences, Pennsylvania State University, University Park, Pennsylvania, 16802, USA
| | - Daniel W Renner
- Department of Biochemistry and Molecular Biology, Center for Infectious Disease Dynamics, and the Huck Institutes of the Life Sciences, Pennsylvania State University, University Park, Pennsylvania, 16802, USA
| | - Richard L Thompson
- Department of Molecular Genetics, Biochemistry and Microbiology, University of Cincinnati, Cincinnati, Ohio, 45229, USA
| | - Moriah L Szpara
- Department of Biochemistry and Molecular Biology, Center for Infectious Disease Dynamics, and the Huck Institutes of the Life Sciences, Pennsylvania State University, University Park, Pennsylvania, 16802, USA.
| | - Nancy M Sawtell
- Division of Infectious Diseases, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, 45229, USA
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