Assay Method Information

Assay Name:  Human Platelet Aggregation Inhibition Test
Description:  Blood collected from healthy human volunteers in aqueous trisodium citrate solution was centrifuged at 150 g for 15 min and the upper layer was recovered to obtain platelet-rich plasma (PRP). The residual blood was centrifuged at 3000 g for 10 min and the supernatant was collected as platelet-poor plasma (PPP). Platelet concentration in the PRP was determined using the Z series Beckman Coulter particle counter (Beckman, Fullerton, Calif.) and adjusted to 250,000 platelets/μL using PPP. 480 μL of PRP was pre-incubated at 37 C. and stirred at 1200 rpm with 10 μL aqueous test compound solution for 1 min prior to induction of aggregation by the addition of 10 μL of aqueous adenosine diphosphate (ADP) solution to adjust the final ADP concentration in the PRP to 110−5 M. The maximal amplitude of aggregation response within 3 min was determined and measured in triplicate using the Chronolog model 490 aggregometer (Chrono-log Corp., Havertown, Pa.). Percent inhibition of aggregation was calculated from the maximum decrease in optical density of the control (addition of water in place of the test compound solution) sample and of the samples containing test compound
Affinity data for this assay
 

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