Changes in nocturnal pineal indoleamine metabolism in rats treated with parathion are prevented by beta-adrenergic antagonist administration.


Parathion, an organophosphorous insecticide, was previously shown to enhance the nighttime rise in pineal N-acetyltransferase (NAT) activity and serum melatonin levels. The purpose of the present study was to test whether parathion acts on the pineal gland by means of a beta-adrenergic receptor mechanism. Whereas parathion (total dose 6.5 mg/kg body wt over… (More)


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