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

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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

ID: 180823055