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Rationale Methamphetamine (MA) increases extracellular dopamine (DA) and at chronic high doses induces toxicity as indicated by decreased expression of tyrosine hydroxylase (TH) and dopamine transporter (DAT). Notably, rats will self-administer MA in escalating quantities producing such toxicity. However, the impact of MA at sub-toxic doses on DA regulation is not well established. Objective The...
Aging in rodents, monkeys, and man is correlated with a reduction in dopamine transporter (DAT) ligand binding and DAT function. Using Western blot techniques, we investigated whether the source of these age-related changes in DAT was correlated with decreases in DAT protein levels in the striatum, substantia nigra (SN), nucleus accumbens (NAc), and ventral tegmental area (VTA) of 6, 18, and 24-month-old...
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