Inhibition by pesticides of prostaglandin formation in blood platelets.

Aggregation of human platelets was investigated after pre-incubation of platelet rich plasma with various pesticides of the carbamate type. Whereas N-methyl-carbamates (insecticides) inhibited the arachidonic acid induced aggregation, N-phenyl-carbamates (herbicides) had no effect. The influence of the different carbamates on aggregation coincided with their inhibition of thromboxane B2-formation. - DDE, a metabolite of the insecticide DDT, affected aggregation to a similar extent as N-methyl-carbamates. DDT, however, had no inhibitory activity.