Measuring Platelet Aggregation with Microplate Reader: A New Technical Approach to Platelet Aggregation Studies

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Abstract
Platelet aggregation measurements were done with the use of a commercially available microtiter plate reader with specific modification of the mode of agitation of the samples. Satisfactory aggregation curves were obtained with use of an external horizontal agitator, with an amplitude of 1.3 mm and minimum frequency of 1,360 cycles/minute. With the use of the 96 available wells in the microtiter plates, all test and control platelet samples, with replicates, were observed simultaneously and the output data obtained within 10-15 minutes. The technique was validated by demonstrating the similarity of dose-response curves, obtained with a astandard aggregometer and with the microtiter technique, of platelets stimulated by adenosine diphosphate, thrombin, and arachidonic acid.

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