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EFFECT OF EXTRACELLULAR MATRIX PROTEINS ON VASCULAR SMOOTH MUSCLE CELL PHENOTYPE

机译:细胞外基质蛋白对血管平滑肌细胞表型的影响

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The effect on phenotypic expression of rabbit vascular smooth muscle cells (SMC) of the interstitial matrix proteins collagen I and fibronectin, the basal lamina proteins collagen IV and laminin, and the serum adhesion protein vitronectin was examined in culture. Experiments were performed in foetal calf serum stripped of fibronectin and vitronectin to eliminate their confounding effects. All the proteins promoted adhesion to the plastic culture dish (in a concentration dependent manner) of SMC freshly isolated from the artery wall. These cells had a high volume density of myofilaments CV,myo) in their cytoplasm. Laminin was best at maintaining SMC with a high V(v)myo (V(v)myo = 49.8%) followed by collagen IV (41.7%). Cells plated on vitronectin showed the lowest V(v)myo (31.3%). The results support the concept that the SMC basal lamina has a role in maintaining cells in the high V(v)myo phenotype.
机译:在培养中检查了间质基质蛋白胶原蛋白I和纤连蛋白,基底层蛋白胶原蛋白IV和层粘连蛋白以及血清粘附蛋白玻连蛋白对兔血管平滑肌细胞(SMC)表型表达的影响。在剥除纤连蛋白和玻连蛋白的胎牛血清中进行实验,以消除它们的混杂作用。所有这些蛋白都促进了从动脉壁新鲜分离的SMC对塑料培养皿的粘附(以浓度依赖性方式)。这些细胞在其细胞质中具有很高的肌丝CV,myo体积密度。层粘连蛋白最能维持较高的V(v)myo(V(v)myo = 49.8%),其次是胶原IV(41.7%)。铺在玻连蛋白上的细胞显示最低的V(v)myo(31.3%)。结果支持了SMC基底层在维持高V(v)myo表型细胞中起作用的概念。

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