DC-SIGN-ICAM-2 interaction mediates dendritic cell trafficking

Nat Immunol. 2000 Oct;1(4):353-7. doi: 10.1038/79815.

T B Geijtenbeek ¹, D J Krooshoop, D A Bleijs, S J van Vliet, G C van Duijnhoven, V Grabovsky, R Alon, C G Figdor, Y van Kooyk

Affiliations

Affiliation

1 Department of Tumor Immunology, University Medical Center St Radboud, Philips van Leydenlaan 25, Nijmegen 6525 EX, The Netherlands.

PMID: 11017109 DOI: 10.1038/79815

Abstract

Dendritic cells (DCs) are recruited from blood into tissues to patrol for foreign antigens. After antigen uptake and processing, DCs migrate to the secondary lymphoid organs to initiate immune responses. We now show that DC-SIGN, a DC-specific C-type lectin, supports tethering and rolling of DC-SIGN-positive cells on the vascular ligand ICAM-2 under shear flow, a prerequisite for emigration from blood. The DC-SIGN-ICAM-2 interaction regulates chemokine-induced transmigration of DCs across both resting and activated endothelium. Thus, DC-SIGN is central to the unusual trafficking capacity of DCs, further supported by the expression of DC-SIGN on precursors in blood and on immature and mature DCs in both peripheral and lymphoid tissues.

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