Santoro S A, Cunningham L W
Proc Natl Acad Sci U S A. 1979 Jun;76(6):2644-8. doi: 10.1073/pnas.76.6.2644.
A rapid, sensitive, and reproducible assay to determine the adhesion of platelets to collagen has been developed. Collagen fibers and adherent platelets are retained on polycarbonate membrane filters. Chemical modification of collagen by acetylation and of platelets by treatment with chymotrypsin markedly reduces adhesion. The role of fibronectin in the collagen-platelet interaction has been examined. Treatment of platelets with purified antibody or Fab' fragments to fibronectin only slightly reduces adhesion. Preincubation of platelets with high concentrations of gelatin reduces adhesion by only 22% but fails to inhibit aggregation. Thus, fibronectin has only a limited role in the adhesion of platelets to collagen and is either not involved in the adhesion that leads to aggregation or is only one of several adhesion mechanisms, any of which alone can initiate aggregation.
已开发出一种快速、灵敏且可重复的测定血小板与胶原蛋白黏附的方法。胶原蛋白纤维和黏附的血小板保留在聚碳酸酯膜滤器上。通过乙酰化对胶原蛋白进行化学修饰以及用胰凝乳蛋白酶处理血小板可显著降低黏附。已研究了纤连蛋白在胶原蛋白 - 血小板相互作用中的作用。用纯化的抗纤连蛋白抗体或Fab'片段处理血小板仅轻微降低黏附。用高浓度明胶预孵育血小板仅使黏附降低22%,但未能抑制聚集。因此,纤连蛋白在血小板与胶原蛋白的黏附中仅起有限作用,要么不参与导致聚集的黏附,要么只是几种黏附机制之一,其中任何一种机制单独都可引发聚集。