The anti-microbial peptide LL-37 modulates immune responses in the palatine tonsils where it is exclusively expressed by neutrophils and a subset of dendritic cells

The anti-microbial peptide LL-37 modulates immune responses in the palatine tonsils where it is exclusively expressed by neutrophils and a subset of dendritic cells

Copyright © 2011 Elsevier Inc. All rights reserved.

Bibliographische Detailangaben
Veröffentlicht in:Clinical immunology (Orlando, Fla.). - 1999. - 142(2012), 2 vom: 15. Feb., Seite 139-49
1. Verfasser: Sigurdardottir, Sigrun L (VerfasserIn)
Weitere Verfasser: Thorleifsdottir, Ragna H, Guzman, Andrew M, Gudmundsson, Gudmundur H, Valdimarsson, Helgi, Johnston, Andrew
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2012
Zugriff auf das übergeordnete Werk:Clinical immunology (Orlando, Fla.)
Schlagworte:Journal Article Research Support, Non-U.S. Gov't Antimicrobial Cationic Peptides CCR4 protein, human CCR6 protein, human CXCL5 protein, human Chemokine CXCL5 Chemokine CXCL9 Myxovirus Resistance Proteins Receptors, CCR4 mehr... Receptors, CCR6 Interferon-gamma 82115-62-6 GTP-Binding Proteins EC 3.6.1.- Cathelicidins
Beschreibung
Zusammenfassung:Copyright © 2011 Elsevier Inc. All rights reserved.
Antimicrobial peptides are essential elements of epithelial defense against invading micro-organisms. The palatine tonsils are positioned at the entry of the airway and the gut and as such are ideally situated to act as immune sentinels in the pharynx protecting against microbial invasion. Tonsils express a number of antimicrobial peptides including hCAP18/LL-37. Here we clearly define the expression of hCAP18/LL-37 in the tonsils showing unequivocally that hCAP18/LL-37 is mainly expressed by infiltrating neutrophils and follicular CD11c+CD13+HLA-DR+ dendritic cells, rarely by macrophages, and never by the epithelium itself. To explore possible functions for follicle-derived LL-37, we stimulated tonsil mononuclear cells with LL-37 in vitro and observed the secretion of the proinflammatory cytokines CCL5 and CXCL9, expression of IFN-γ and MX-1 and down-regulation of chemokine receptors CCR4 and CCR6 which are involved in tissue-selective T cell trafficking. Taken together, these data illustrate new potential immunoregulatory functions for hCAP18/LL-37 in the tonsils
Beschreibung:Date Completed 11.04.2012
Date Revised 07.12.2022
published: Print-Electronic
Citation Status MEDLINE
ISSN:1521-7035
DOI:10.1016/j.clim.2011.09.013