title: Effect of pentoxifylline on platelet aggregation.
abstract: The effect of various concentrations of pentoxifylline, a methylxanthine, on platelet aggregation was evaluated in vitro by Born's method. The study was performed on platelet-rich plasma obtained from two series of clinically healthy subjects: in the first, pentoxifylline was added to platelet-rich plasma just before ADP or epinephrine; in the second, pentoxifylline was incubated with platelet-rich plasma for 150 minutes at 37 degrees C before testing. Statistical analysis of the results demonstrates that pentoxifylline exerts a dose-dependent inhibiting action on platelet aggregation, particularly when epinephrine is chosen as the aggregating agent, and that the pre-incubation of pentoxifylline with blood platelets greatly enhances its inhibitory effect.
mesh_terms: D000244:Adenosine Diphosphate / Q000494:pharmacology; D000328:Adult; D000368:Aged; D004305:Dose-Response Relationship, Drug; D004837:Epinephrine / Q000494:pharmacology; D006801:Humans; D008297:Male; D008875:Middle Aged; D010431:Pentoxifylline / Q000494:pharmacology*; D010974:Platelet Aggregation / Q000187:drug effects*; D013805:Theobromine / Q000031:analogs & derivatives*
chemical_list: D000244:Adenosine Diphosphate; D013805:Theobromine; D010431:Pentoxifylline; D004837:Epinephrine