[Comparison of platelet activators used in slide platelet aggregation test]

The study was purposed to explore the suitable platelet activators to be used in slide platelet aggregation test. Experiments were as follows: (1) to detect the intensity and time in 15 healthy donors' platelet aggregation tests induced by cationic propyl gallate (c-PG) and the usual platelet activators: ADP, collagen, epinephrine, arachidonic acid and ristocentin, respectively; (2) to detect the time in platelet aggregation tests of 15 healthy donors induced by c-PG and the above usual platelet activators respectively after addition of PGI2, cAMP or EDTA; (3) to detect the time in 15 healthy donors' platelet aggregation tests induced by c-PG after addition of heparin; (4) to detect the intensity and time of platelet aggregation induced by c-PG at the platelet count of (240-15) x 10(9)/L, (5) to detect the time of platelet aggregation induced by c-PG in eight patients each of whom had taken 100 mg aspirin per day for five days. The results showed that (1) c-PG reduced the strongest intensity of platelet aggregation and the time taken was appropriate, (2) c-PG was the most effective activator to reveal the inhibitive effect on platelet by PGI2, cAMP or EDTA, (3) 0.5 - 3 U/ml heparin did not significantly change the platelet aggregation induced by c-PG, (4) 15 healthy donors' platelet aggregation induced by c-PG displayed clearly on the slide until the platelet count below 30 x 10(9)/L, (5) The platelet aggregation time induced by c-PG was significantly prolonged in eight patients who had taken aspirin. In conclusion, compared to the usual platelet activators, c-PG has remarkable potential advantages when used in slide platelet aggregation test.