粘附蛋白在环氧交联牛心包材料体外内皮化中作用的实验研究

Effects of Adhesive Proteins on Endothelialization of PC Crosslinking Yak Pericardial Materials—An Experimental Study

为研究生物材料体外内皮化的最佳条件 ,我们作了血管内皮细胞 (EC)在PC牛心包材料上生长特性的研究。方法为环氧交联 (PC)牛心包材料 ,漂洗后用 3种不同的粘附蛋白预衣被 ,种植犬的血管EC ,未衣被组作为对照。结果表明 :Fibronectin(FN)及Laminin(La)组 ,经 710d培养 ,片上EC形成单层 ,而未衣被组及CollagenI(CL I)组PC心包片上无细胞生长。结论 :(1)PC牛心包材料的确具有细胞毒性 ;(2 )La及FN具有拮抗PC细胞毒性的作用 ;3)经La及FN的衣被 ,PC牛心包生物材料达到了体外内皮化的要求 ,其中以La效果最佳 ,与FN相比 ,两者有显著性差异 (P <0 0 5 )。粘附蛋白CL I在本实验中没有发挥其促EC粘附及生长作用。

To investigate the conditions of endothelialization of biomaterials, we examined in vitro the growth properties of endothelial cells on PC treated yak pericardial materials. After rinsed in normal saline (0.9%), the surface of PC crosslinking yak pericardial materials was precoated with three kinds of adhesive proteins—Laminin(La), Fibronectin(FN) and Collagen I(CL I). Ednothelial cells(EC) from the canine were seeded on the precoated materials, and on the uncoated materials as control. The result showed that in the La and FN groups the seeded EC survived and grew on the patches, while in the CL I group and uncoated group the seeded EC on and around the patches did not continue to live. Conclusively, in this experiment, PC yak pericardial materials had cytotoxicity; the cytotoxicity of PC crosslinking yak pericardial materials could be decreased by La and FN precoating;La and FN promoted the adhesion and growth of EC on the PC yak pericardial materials patches; the materials met the needs of endothelialization in vitro, prominently in the La group;there was significant difference in endothelialization between La and FN groups (P<0 05);CL I had no part in promoting EC adhesion and growth.