Leukocyte-associated Ig-like receptor-1 is a novel inhibitory receptor for surfactant protein D

Marloes J.M. Olde Nordkamp, Martin van Eijk, Rolf T. Urbanus, Louis Bont, Henk P. Haagsman, Linde Meyaard

Onderzoeksoutput: Bijdrage aan tijdschriftArtikelpeer review

55 Citaten (Scopus)

Samenvatting

The collagenous C-type lectin, SP-D, is a multitrimeric glycoprotein present at mucosal surfaces and is involved in host defense against infections in mammals. SP-D has immunomodulatory properties, but the underlying mechanisms are incompletely understood. SP-D contains collagen domains. LAIR-1 is an inhibitory immune receptor at the cell surface of various immunecompetent cells that binds collagen. We hypothesized that the immunomodulatory functions of SP-D can be mediated via interactions between its collagen domain and LAIR-1. Binding assays show that SP-D interacts via its collagenous domain with LAIR-1 and the related LAIR-2. This does not affect the mannan-binding capacities of SP-D, which induces cross-linking of LAIR-1 in a cellular reporter assay. Functional assays show that SP-D inhibits the production of FcαR-mediated reactive oxygen via LAIR-1. Our studies indicate that SP-D is a functional ligand of the immune inhibitory receptor LAIR-1. Thus, we have identified a novel pathway for the immunomodulatory functions of SP-D mediated via binding of its collagenous domains to LAIR-1. This may provide a mechanism for the unexplained immunomodulatory function of the collagenous domains of SP-D.

Originele taal-2Engels
Pagina's (van-tot)105-111
Aantal pagina's7
TijdschriftJournal of Leukocyte Biology
Volume96
Nummer van het tijdschrift1
DOI's
StatusGepubliceerd - jul. 2014
Extern gepubliceerdJa

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