Abstract
We have evaluated the effect of chronic nicotine intake on the age-associated loss of nigrostriatal dopaminergic neurons. The striatal density of dopamine (D1 and D 2) receptors and DA-uptake sites decreased with age. Concomitant with these changes was a pronounced loss of many behavioral functions associated, at least in part, with dopaminergic neurotransmission. Chronic oral intake of nicotine resulted in partial restoration of the loss of receptors as well as behavioral performances. The results suggest that low doses of nicotine could have beneficial effects during aging.
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