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Increased oxyradical production and membrane lipid peroxidation (MLP) occur under physiological and degenerative conditions in neurons. We investigated whether 4-hydroxynonenal (4HN), one of the membrane lipid peroxidation products, affects long-term potentiation (LTP) in the rat dentate gyrus in vitro. Treatment of hippocampal slices with 4HN (10μM) enhanced LTP without affecting basal evoked potentials...
Modification of voltage-gated Ca 2+ channels by hydrogen peroxide, a membrane-permeable form of reactive oxygen species, in cultured dentate granule cells was examined using the whole cell patch clamp technique. Pretreatment with hydrogen peroxide (1 and 10 μM) for 2 h enhanced the Ca 2+ current without affecting its voltage dependence. The enhancement was completely cancelled...
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