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 Citations (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.

Original languageEnglish
JournalJournal of Cell Biology
Volume160
Issue number7
Pages (from-to)1009-15
Number of pages7
ISSN0021-9525
DOIs
Publication statusPublished - 31 Mar 2003

Keywords

  • Animals
  • Cell Adhesion
  • Cell Movement
  • Cells, Cultured
  • Collagen
  • Collagenases
  • Endocytosis
  • Fibroblasts
  • Fibronectins
  • Gene Deletion
  • Matrix Metalloproteinase 13
  • Membrane Glycoproteins
  • Mice
  • Receptors, Cell Surface
  • Receptors, Mitogen
  • Receptors, Urokinase Plasminogen Activator
  • Transferrin
  • Comparative Study
  • Journal Article
  • Research Support, Non-U.S. Gov't

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