CD4


Journal

Journal of virology
ISSN: 1098-5514
Titre abrégé: J Virol
Pays: United States
ID NLM: 0113724

Informations de publication

Date de publication:
01 08 2019
Historique:
received: 25 04 2019
accepted: 08 05 2019
pubmed: 17 5 2019
medline: 2 6 2020
entrez: 17 5 2019
Statut: epublish

Résumé

Respiratory syncytial virus (RSV) infection of seronegative children previously immunized with formalin-inactivated (FI) RSV has been associated with serious enhanced respiratory disease (ERD). The phenomenon was reproduced in the cotton rat and the mouse, and both preclinical models have been routinely used to evaluate the safety of new RSV vaccine candidates. More recently, we demonstrated that immunizations with suboptimal doses of the RSV fusion (F) antigen, in its post- or prefusion conformation, and in the presence of a Th1-biasing adjuvant, unexpectedly led to ERD in the cotton rat model. To assess if those observations are specific to the cotton rat and to elucidate the mechanism by which vaccination with low antigen doses can drive ERD post-RSV challenge, we evaluated RSV post-F antigen dose de-escalation in BALB/c mice in the presence of a Th1-biasing adjuvant. While decreasing antigen doses, we observed an increase in lung inflammation associated with an upregulation of proinflammatory cytokines. The amplitude of the lung histopathology was comparable to that of FI-RSV-induced ERD, confirming the observations made in the cotton rat. Importantly, depletion of CD4

Identifiants

pubmed: 31092578
pii: JVI.00695-19
doi: 10.1128/JVI.00695-19
pmc: PMC6639276
pii:
doi:

Substances chimiques

Adjuvants, Immunologic 0
F protein, human respiratory syncytial virus 0
Respiratory Syncytial Virus Vaccines 0
Vaccines, Subunit 0
Viral Fusion Proteins 0

Types de publication

Journal Article Research Support, Non-U.S. Gov't

Langues

eng

Sous-ensembles de citation

IM

Informations de copyright

Copyright © 2019 American Society for Microbiology.

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Auteurs

Kirsten Schneider-Ohrum (K)

Department of Infectious Disease/Vaccines, MedImmune, Gaithersburg, Maryland, USA.

Angie Snell Bennett (A)

Department of Infectious Disease/Vaccines, MedImmune, Gaithersburg, Maryland, USA.

Gaurav Manohar Rajani (GM)

Department of Infectious Disease/Vaccines, MedImmune, Gaithersburg, Maryland, USA.

Leigh Hostetler (L)

Laboratory Animal Resources, MedImmune, Gaithersburg, Maryland, USA.

Sean K Maynard (SK)

Department of Infectious Disease/Vaccines, MedImmune, Gaithersburg, Maryland, USA.

Michelle Lazzaro (M)

Department of Infectious Disease/Vaccines, MedImmune, Gaithersburg, Maryland, USA.

Lily I Cheng (LI)

Pathology Department, MedImmune, Gaithersburg, Maryland, USA.

Terrence O'Day (T)

Statistical Sciences, MedImmune, Gaithersburg, Maryland, USA.

Corinne Cayatte (C)

Department of Infectious Disease/Vaccines, MedImmune, Gaithersburg, Maryland, USA cayattec@medimmune.com.

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Classifications MeSH