Abstract
Uptake of [U-14C] glycine during the organophosphorus-ester-induced delayed neurotoxicity (OPIDN) development period was studied. Diisopropyl fluorophosphate (DFP), a delayed neurotoxic organophosphorus ester was administered to adult rats and hens. Results showed a decreased accumulation of glycine in hen cerebral cortex slices during the delayed neurotoxicity development period. An altered sensitivity toward transport inhibitors 2,4-dinitrophenol and ouabain was observed in DFP-treated hens. An altered neuronal membrane function during the OPIDN development period is reported in the present work. Brain Na+, K(+)-ATPase and Ca(++)-ATPase activities decreased during the neurotoxicity development period. The decrease in Ca(++)-ATPase activity persisted in hens until the complete development of neurotoxic symptoms. Decreased Ca++ pump activity is correlated with altered membrane function during OPIDN.
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