Grotendorst G R, Seppä H E, Kleinman H K, Martin G R
Proc Natl Acad Sci U S A. 1981 Jun;78(6):3669-72. doi: 10.1073/pnas.78.6.3669.
Smooth muscle cells use fibronectin to bind to type I and type III collagens but bind to type V collagen by a trypsin-resistant intrinsic glycoconjugate. The binding site on type V collagen is located in the alpha A chain. By using collagen-coated filters in a modified Boyden chamber assay for chemotaxis, it was observed that the platelet-derived growth factor was chemotactic for smooth muscle cells but that several other growth factors were inactive. We suggest that the migration of smooth muscle cells from the media to the intima of a blood vessel, which leads to the formation of an atherosclerotic plaque, may be the result of a chemotactic migration of cells responsive to the platelet-derived growth factor.
平滑肌细胞利用纤连蛋白与I型和III型胶原结合,但通过一种抗胰蛋白酶的内在糖缀合物与V型胶原结合。V型胶原上的结合位点位于αA链中。通过在改良的博伊登室趋化性分析中使用胶原包被的滤膜,观察到血小板衍生生长因子对平滑肌细胞具有趋化作用,而其他几种生长因子则无活性。我们认为,平滑肌细胞从血管中膜迁移至内膜并导致动脉粥样硬化斑块形成,可能是细胞对血小板衍生生长因子产生趋化性迁移的结果。