title: Diminished platelet adherence to type V collagen.
abstract: Different types of collagen vary in their influence on platelet reactivity. Collagen Types III, IV, and V were obtained from human placental tissue, and Type I collagen was prepared from rat skin. Each collagen type was coated onto a plastic surface. Each collagen-coated surface or appropriate plastic surface control was studied using citrated human 51Cr-labeled platelet-rich plasma in both the presence and absence of 10 microM adenosine 5'-diphosphate (ADP). Both unstimulated and ADP-induced platelet adherence were: 1) reduced by Type V collagen coating in comparison to uncoated wells; and 2) increased by Types III and IV collagen coating in comparison to Type V coated or plastic surfaces. Addition of the fast-acting thrombin inhibitor dansylarginine (DAPA) had no significant effect on unstimulated and ADP-induced platelet adherence to Type III, IV or V collagen-coated surfaces. Type I collagen-coated surfaces, studied only in the presence of DAPA, caused greater platelet adherence than those coated with Types III, IV, or V collagen. We conclude that Type V collagen may be less thrombogenic than Types, I, III, or IV.
mesh_terms: D000244:Adenosine Diphosphate / Q000494:pharmacology; D000704:Analysis of Variance; D000818:Animals; D001120:Arginine / Q000031:analogs & derivatives / Q000494:pharmacology; D001792:Blood Platelets / Q000502:physiology / Q000648:ultrastructure; D002021:Buffers; D003094:Collagen / Q000145:classification / Q000378:metabolism* / Q000502:physiology; D003619:Dansyl Compounds; D006801:Humans; D010973:Platelet Adhesiveness / Q000187:drug effects; D010974:Platelet Aggregation; D051381:Rats
chemical_list: D002021:Buffers; D003619:Dansyl Compounds; C019162:dansylarginine N-(3-ethyl-1,5-pentanediyl)amide; D000244:Adenosine Diphosphate; D003094:Collagen; D001120:Arginine