Cited by 34Herpesvirus Infections and TreatmentsAnimal Virus Infections StudiesCytomegalovirus and herpesvirus research

Access to a main alphaherpesvirus receptor, located basolaterally in the respiratory epithelium, is masked by intercellular junctions.

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Van Cleemput, Jolien, Poelaert, Katrien C. K., Laval, Kathlyn, Maes, Roger, Hussey, Gisela S., Van den Broeck, Wim, Nauwynck, Hans J.·2017·Scientific Reports

Abstract

The respiratory epithelium of humans and animals is frequently exposed to alphaherpesviruses, originating from either external exposure or reactivation from latency. To date, the polarity of alphaherpesvirus infection in the respiratory epithelium and the role of respiratory epithelial integrity herein has not been studied. Equine herpesvirus type 1 (EHV1), a well-known member of the alphaherpesvirus family, was used to infect equine respiratory mucosal explants and primary equine respiratory epithelial cells (EREC), grown at the air-liquid interface. EHV1 binding to and infection of mucosal explants was greatly enhanced upon destruction of the respiratory epithelium integrity with EGTA or N-acetylcysteine. EHV1 preferentially bound to and entered EREC at basolateral cell surfaces. Restriction of infection via apical inoculation was overcome by disruption of intercellular junctions. Finally, basolateral but not apical EHV1 infection of EREC was dependent on cellular N-linked glycans. Overall, our findings demonstrate that integrity of the respiratory epithelium is crucial in the host's innate defence against primary alphaherpesvirus infections. In addition, by targeting a basolaterally located receptor in the respiratory epithelium, alphaherpesviruses have generated a strategy to efficiently escape from host defence mechanisms during reactivation from latency.

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Crossref · 10.1038/s41598-017-16804-5

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  • Disruption of respiratory epithelial intercellular junctions by EGTA or N-acetylcysteine significantly increases EHV-1 plaques, plaque latitude and infectious virus titer in equine mucosal explants compared to untreated explants.

    “The number of EHV-1 plaques, the plaque latitude and infectious virus titer were significantly increased in explants pretreated with EGTA or NAC compared to untreated ones (Van Cleemput et al., 2017).”

    From The Pathogenesis and Immune Evasive Mechanisms of Equine Herpesvirus Type 1 (2021) · cites this paper as Van Cleemput et al., 2017

    The Results section (‘Intercellular junctions protect respiratory mucosal explants from EHV1 infection’; page unavailable) reports more plaques, wider plaques, and higher infectious-virus titers after EGTA or NAC pretreatment than after control treatment. It explicitly reports significant plaque-count increases in nasal explants and significant plaque-latitude increases for the 97P70 strain, but does not establish that every stated increase in plaque latitude and titer was significant. The claim overstates the statistical significance across all three outcomes. (LLM, conf=0.82)

    Experimental — accuracy not yet measured
  • After primary replication in the horse respiratory epithelium, EHV-1 enters nerve endings of the peripheral nervous system, including those from trigeminal ganglia, sympathetic and parasympathetic neurons that innervate the epithelium.

    “After primary replication in the horse respiratory epithelium, EHV-1 enters nerve endings of the PNS, including those coming from the trigeminal ganglia (TG), sympathetic and parasympathetic neurons that innervate the epithelium (Figure 1.1e; Van Cleemput et al., 2017).”

    From The Pathogenesis and Immune Evasive Mechanisms of Equine Herpesvirus Type 1 (2021) · cites this paper as Van Cleemput et al., 2017

    The Introduction says that viral DNA has been found in trigeminal ganglia, suggesting neuronal latency. The Discussion hypothesizes that primary respiratory replication can infect neurons, but neither passage establishes entry through nerve endings or identifies sympathetic and parasympathetic neurons as routes of infection. (LLM, conf=0.85)

    Experimental — accuracy not yet measured
  • Disruption of intercellular junctions results in enhanced EHV-1 binding to explant basolateral surfaces.

    “Interestingly, the authors demonstrated that disruption of ICJ results in enhanced EHV-1 binding to explant basolateral surfaces.”

    From The Pathogenesis and Immune Evasive Mechanisms of Equine Herpesvirus Type 1 (2021) · cites this paper as Van Cleemput et al., 2017

  • The presence of an EHV-1 receptor located at the basolateral side of the respiratory epithelium is a key advantage for the virus to efficiently bind and infect epithelial cells upon reactivation.

    “The presence of an EHV-1 receptor located at the basolateral side of the respiratory epithelium is a key advantage for the virus to efficiently bind and infect epithelial cells upon reactivation (Van Cleemput et al., 2017).”

    From The Pathogenesis and Immune Evasive Mechanisms of Equine Herpesvirus Type 1 (2021) · cites this paper as Van Cleemput et al., 2017

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Authors
Van Cleemput, J., Poelaert, K. C. K., Laval, K., Maes, R., Hussey, G. S., Van den Broeck, W., & Nauwynck, H. J.
Affiliations
  • Ghent University (BE)
  • Princeton University (US)
  • Michigan State University (US)
Corresponding author
Nauwynck, Hans J.
Venue
Scientific Reports
Published
2017-11-30
Volume
7
Issue
1
Pages
16656-16656
ISSN
2045-2322 (ISSN-L)
OpenAlex
W2770240216
Cited by
34
References
77
Citations by year
2026: 1 · 2025: 3 · 2024: 8 · 2023: 4 · 2022: 3 · 2021: 3 · 2020: 3 · 2019: 8 · 2018: 1
FWCI
2.57
Type
journal article
Language
en
Open access
Locations
  • Scientific Reports (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • Ghent University Academic Bibliography (Ghent University) (publishedVersion)
  • Ghent University Academic Bibliography (Ghent University) (publishedVersion, other-oa)
  • Ghent University Academic Bibliography (Ghent University) (submittedVersion, cc-by)
Funders
  • Fonds Wetenschappelijk Onderzoek (11Y5415N)
  • Vlaamse regering
Topics
  • Health Sciences › Medicine › Epidemiology › Herpesvirus Infections and Treatments
  • Life Sciences › Agricultural and Biological Sciences › Animal Science and Zoology › Animal Virus Infections Studies
  • Health Sciences › Medicine › Epidemiology › Cytomegalovirus and herpesvirus research
Keywords
alphaherpesvirus, equine herpesvirus 1, respiratory epithelium, intercellular junctions, epithelial barrier integrity, viral entry, N-glycans, air-liquid interface, viral reactivation
MeSH terms
Animals, Herpesvirus 1, Equid, Herpesviridae Infections, Horse Diseases, Horses, Intercellular Junctions, Polysaccharides, Receptors, Virus, Virus Replication, Alphaherpesvirinae, Viral Load, Respiratory Mucosa

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