Regulation of chemerin chemoattractant and antibacterial activity by human cysteine cathepsins.
J Immunol
; 187(3): 1403-10, 2011 Aug 01.
Article
em En
| MEDLINE
| ID: mdl-21715684
ABSTRACT
Chemerin, a ligand for the G-protein coupled receptor chemokine-like receptor 1, requires C-terminal proteolytic processing to unleash its chemoattractant activity. Proteolytically processed chemerin selectively attracts specific subsets of immunoregulatory APCs, including chemokine-like receptor 1-positive immature plasmacytoid dendritic cells (pDC). Chemerin is predicted to belong to the structural cathelicidin/cystatin family of proteins composed of antibacterial polypeptide cathelicidins and inhibitors of cysteine proteinases (cystatins). We therefore hypothesized that chemerin may interact directly with cysteine proteases, and that it might also function as an antibacterial agent. In this article, we show that chemerin does not inhibit human cysteine proteases, but rather is a new substrate for cathepsin (cat) K and L. cat K- and L-cleaved chemerin triggered robust migration of human blood-derived pDC ex vivo. Furthermore, cat K- and L-truncated chemerin also displayed antibacterial activity against Enterobacteriaceae. Cathepsins may therefore contribute to host defense by activating chemerin to directly inhibit bacterial growth and to recruit pDC to sites of infection.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Catepsina B
/
Fatores Quimiotáticos
/
Quimiocinas
/
Receptores de Quimiocinas
/
Catepsina K
/
Catepsina L
/
Cisteína Proteases
/
Antibacterianos
Tipo de estudo:
Prognostic_studies
Limite:
Animals
/
Humans
Idioma:
En
Revista:
J Immunol
Ano de publicação:
2011
Tipo de documento:
Article
País de afiliação:
Polônia