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 language | English |
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Journal | Journal of Cell Biology |
Volume | 160 |
Issue number | 7 |
Pages (from-to) | 1009-15 |
Number of pages | 7 |
ISSN | 0021-9525 |
DOIs | |
Publication status | Published - 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