Rationale: The chemokine CXCL12 (CXC motif ligand 12) and its receptor CXCR 4 (CXC motif receptor 4) direct the recruitment of smooth muscle progenitor cells (SPCs) in neointima formation after vascular injury. Lysophosphatidic acid (LPA) induces CXCL12 and neointimal accumulation of smooth muscle cells (SMCs) in uninjured arteries. Thus, we hypothesize that LPA may regulate CXCL12-mediated vascular remodelling.
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