Boosting Adaptive Immunity: A New Role for PAFR Antagonists.
Détails
Etat: Public
Version: Final published version
ID Serval
serval:BIB_F560DB44EF55
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Institution
Titre
Boosting Adaptive Immunity: A New Role for PAFR Antagonists.
Périodique
Scientific Reports
ISSN
2045-2322 (Electronic)
ISSN-L
2045-2322
Statut éditorial
Publié
Date de publication
2016
Volume
6
Pages
39146
Langue
anglais
Résumé
We have previously shown that the Platelet-Activating Factor Receptor (PAFR) engagement in murine macrophages and dendritic cells (DCs) promotes a tolerogenic phenotype reversed by PAFR-antagonists treatment in vitro. Here, we investigated whether a PAFR antagonist would modulate the immune response in vivo. Mice were subcutaneously injected with OVA or OVA with PAFR-antagonist WEB2170 on days 0 and 7. On day 14, OVA-specific IgG2a and IgG1 were measured in the serum. The presence of WEB2170 during immunization significantly increased IgG2a without affecting IgG1 levels. When WEB2170 was added to OVA in complete Freund's adjuvant, enhanced IgG2a but not IgG1 production was also observed, and CD4+ FoxP3+ T cell frequency in the spleen was reduced compared to mice immunized without the antagonist. Similar results were observed in PAFR-deficient mice, along with increased Tbet mRNA expression in the spleen. Additionally, bone marrow-derived DCs loaded with OVA were transferred into naïve mice and their splenocytes were co-cultured with fresh OVA-loaded DCs. CD4(+) T cell proliferation was higher in the group transferred with DCs treated with the PAFR-antagonist. We propose that the activation of PAFR by ligands present in the site of immunization is able to fine-tune the adaptive immune response.
Pubmed
Web of science
Open Access
Oui
Création de la notice
05/01/2017 9:50
Dernière modification de la notice
20/08/2019 17:22