Kinetics of Mg2+-ATPase inhibition by benthiocarb and its recovery by oximes and L-cysteine in brain of albino rat (Wistar strain).

Effects in vitro of benthiocarb on rat brain Mg2+-ATPase were studied to elucidate the interaction of benthiocarb with Mg2+-ATPase. Based on IC50 values, it was evident that Mg2+-ATPase was sensitive to benthiocarb. Non-competitive inhibition with respect to activation by ATP was indicated by decreased maximal velocity (V) without change in Michaelis Menten constant (Km). It was also noted that pyridine-2-aldoxime (30 microM), pyridine-4-aldoxime (35 microM) and L-cysteine (90 microM) neutralized the inhibition of benthiocarb (8 microM).