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Hayes CK, Villota CK, McEnany FB, Cerón S, Awasthi S, Szpara ML, Friedman HM, Leib DA, Longnecker R, Weitzman MD, Akhtar LN. Herpes Simplex Virus-2 Variation Contributes to Neurovirulence During Neonatal Infection. J Infect Dis 2022; 226:1499-1509. [PMID: 35451492 PMCID: PMC10205897 DOI: 10.1093/infdis/jiac151] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2022] [Accepted: 04/20/2022] [Indexed: 11/14/2022] Open
Abstract
Herpes simplex virus (HSV) infection of the neonatal brain causes severe encephalitis and permanent neurologic deficits. However, infants infected with HSV at the time of birth follow varied clinical courses, with approximately half of infants experiencing only external infection of the skin rather than invasive neurologic disease. Understanding the cause of these divergent outcomes is essential to developing neuroprotective strategies. To directly assess the contribution of viral variation to neurovirulence, independent of human host factors, we evaluated clinical HSV isolates from neonates with different neurologic outcomes in neurologically relevant in vitro and in vivo models. We found that isolates taken from neonates with encephalitis are more neurovirulent in human neuronal culture and mouse models of HSV encephalitis, as compared to isolates collected from neonates with skin-limited disease. These findings suggest that inherent characteristics of the infecting HSV strain contribute to disease outcome following neonatal infection.
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Affiliation(s)
- Cooper K Hayes
- Department of Microbiology-Immunology, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | - Christopher K Villota
- Department of Pediatrics, Division of Infectious Diseases, Ann and Robert H. Lurie Children’s Hospital of Chicago, Chicago, Illinois, USA
| | - Fiona B McEnany
- Department of Microbiology and Immunology, Geisel School of Medicine at Dartmouth, Lebanon, New Hampshire, USA
| | - Stacey Cerón
- Department of Microbiology and Immunology, Geisel School of Medicine at Dartmouth, Lebanon, New Hampshire, USA
| | - Sita Awasthi
- Department of Medicine, Division of Infectious Diseases, University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania, USA
| | - Moriah L Szpara
- Departments of Biology, Biochemistry, and Molecular Biology, Center for Infectious Disease Dynamics and the Huck Institutes of the Life Sciences, Pennsylvania State University, University Park, Pennsylvania, USA
| | - Harvey M Friedman
- Department of Medicine, Division of Infectious Diseases, University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania, USA
| | - David A Leib
- Department of Microbiology and Immunology, Geisel School of Medicine at Dartmouth, Lebanon, New Hampshire, USA
| | - Richard Longnecker
- Department of Microbiology-Immunology, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | - Matthew D Weitzman
- Department of Pathology and Laboratory Medicine, Division of Protective Immunity, Children’s Hospital of Philadelphia, Philadelphia, Pennsylvania, USA
- Department of Pathology and Laboratory Medicine, University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania, USA
| | - Lisa N Akhtar
- Department of Pediatrics, Division of Infectious Diseases, Ann and Robert H. Lurie Children’s Hospital of Chicago, Chicago, Illinois, USA
- Department of Pediatrics, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
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Perez M, Lee KJ, Cardona HJ, Taylor JM, Robbins ME, Waypa GB, Berkelhamer SK, Farrow KN. Aberrant cGMP signaling persists during recovery in mice with oxygen-induced pulmonary hypertension. PLoS One 2017; 12:e0180957. [PMID: 28792962 PMCID: PMC5549891 DOI: 10.1371/journal.pone.0180957] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2016] [Accepted: 06/23/2017] [Indexed: 12/25/2022] Open
Abstract
Bronchopulmonary dysplasia (BPD), a common complication of preterm birth, is associated with pulmonary hypertension (PH) in 25% of infants with moderate to severe BPD. Neonatal mice exposed to hyperoxia for 14d develop lung disease similar to BPD, with evidence of associated PH. The cyclic guanosine monophosphate (cGMP) signaling pathway has not been well studied in BPD-associated PH. In addition, there is little data about the natural history of hyperoxia-induced PH in mice or the utility of phosphodiesterase-5 (PDE5) inhibition in established disease. C57BL/6 mice were placed in room air or 75% O2 within 24h of birth for 14d, followed by recovery in room air for an additional 7 days (21d). Additional pups were treated with either vehicle or sildenafil for 7d during room air recovery. Mean alveolar area, pulmonary artery (PA) medial wall thickness (MWT), RVH, and vessel density were evaluated at 21d. PA protein from 21d animals was analyzed for soluble guanylate cyclase (sGC) activity, PDE5 activity, and cGMP levels. Neonatal hyperoxia exposure results in persistent alveolar simplification, RVH, decreased vessel density, increased MWT, and disrupted cGMP signaling despite a period of room air recovery. Delayed treatment with sildenafil during room air recovery is associated with improved RVH and decreased PA PDE5 activity, but does not have significant effects on alveolar simplification, PA remodeling, or vessel density. These data are consistent with clinical studies suggesting inconsistent effects of sildenafil treatment in infants with BPD-associated PH.
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Affiliation(s)
- Marta Perez
- Department of Pediatrics, Northwestern University, Chicago, IL, United States of America
- * E-mail:
| | - Keng Jin Lee
- Department of Pediatrics, Northwestern University, Chicago, IL, United States of America
| | - Herminio J. Cardona
- Department of Pediatrics, Northwestern University, Chicago, IL, United States of America
| | - Joann M. Taylor
- Department of Pediatrics, Northwestern University, Chicago, IL, United States of America
| | - Mary E. Robbins
- Department of Pediatrics, Northwestern University, Chicago, IL, United States of America
| | - Gregory B. Waypa
- Department of Pediatrics, Northwestern University, Chicago, IL, United States of America
| | - Sara K. Berkelhamer
- Department of Pediatrics, University at Buffalo, Buffalo, NY, United States of America
| | - Kathryn N. Farrow
- Department of Pediatrics, Northwestern University, Chicago, IL, United States of America
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