uPARAP/Endo180 is essential for cellular uptake of collagen and promotes fibroblast collagen adhesion

Lars H Engelholm, Karin List, Sarah Netzel-Arnett, Edna Cukierman, David J Mitola, Hannah Aaronson, Lars Kjøller, Jørgen K Larsen, Kenneth M. Yamada, Dudley K Strickland, Kenn Holmbeck, Keld Danø, Henning Birkedal-Hansen, Niels Behrendt, Thomas H. Bugge

132 Citationer (Scopus)

Abstract

The uptake and lysosomal degradation of collagen by fibroblasts constitute a major pathway in the turnover of connective tissue. However, the molecular mechanisms governing this pathway are poorly understood. Here, we show that the urokinase plasminogen activator receptor-associated protein (uPARAP)/Endo180, a novel mesenchymally expressed member of the macrophage mannose receptor family of endocytic receptors, is a key player in this process. Fibroblasts from mice with a targeted deletion in the uPARAP/Endo180 gene displayed a near to complete abrogation of collagen endocytosis. Furthermore, these cells had diminished initial adhesion to a range of different collagens, as well as impaired migration on fibrillar collagen. These studies identify a central function of uPARAP/Endo180 in cellular collagen interactions.

OriginalsprogEngelsk
TidsskriftJournal of Cell Biology
Vol/bind160
Udgave nummer7
Sider (fra-til)1009-15
Antal sider7
ISSN0021-9525
DOI
StatusUdgivet - 31 mar. 2003

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