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Endogenous opioid peptides enkephalin and dynorphin are major co-transmitters of striatofugal pathways of the basal ganglia. They are involved in the genesis of levodopa-induced dyskinesia and in the modulation of direct and indirect striatal output pathways that are disrupted in Parkinson's disease. One pharmacologic approach is to develop synthetic glycopeptides closely resembling endogenous peptides...
To determine if extracellular ascorbate, which may increase by several hundred micromolar in striatum during behavioral activation, directly alters glutamate transmission, we monitored striatal glutamate transients evoked by electrical stimulation of cerebral cortex in anesthetized rats tested with varying concentrations of ascorbate (0, 50, 200, and 500μM) by reverse dialysis. Capillary electrophoresis...
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