The low density lipoprotein receptor-related protein (LRP) is a multifunctional cell surface receptor highly expressed in human aortic smooth muscle cells. In the present study, we used the short interfering RNA (siRNA) technique to explore the role of LRP in smooth muscle cell migration. We identified an LRP-specific siRNA that selective silences LRP expression in human aortic smooth muscle cells. As a consequence, LRP-mediated ligand degradation was significantly reduced. More important, we found that platelet-derived growth factor-dependent cell migration was inhibited in cells transfected with LRP siRNA. These results demonstrate an important role of LRP in smooth muscle cell migration.
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Li et al. (2003) studied this question.
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