Mechanisms Of Dopamine Signaling Contributing To The Nicotine Addiction Process | 8725
ISSN: 2155-6105

Journal of Addiction Research & Therapy
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Mechanisms of Dopamine signaling contributing to the Nicotine addiction process

2nd International Conference and Exhibition on Addiction Research & Therapy

John A. Dani

ScientificTracks Abstracts: J Addict Res Ther

DOI: 10.4172/2155-6105.S1.011

N icotine is the principle addictive component that drives continued tobacco use despite the harmful consequences. Nicotine initiates addiction by acting upon neural circuitry that normally reinforces behaviors that lead to rewarding goals. An important circuit is the mesocorticolimbic dopamine system that contributes to the processing of rewarding sensory stimuli during the overall shaping of successful behaviors. Both local nicotinic influences within the hippocampus and long range influence over dopamine centers regulate synaptic plasticity and learning during the addiction process. In the hilar region of the dentate, local nicotinic cholinergic activity regulates hippocampal inhibitory circuits. Simultaneously, nicotinic activity increases the dopamine signal broadcast to the hilus, thereby, lowering the threshold for synaptic plasticity and enabling learning. The results suggest that dopaminergic signaling serves as a functional label of salient events by enabling synaptic plasticity that underlies associative memory Supported mainly by NIH NIDA (DA09411) and NINDS (NS21229)
John A. Dani received his Ph.D. in Physiology from the University of Minnesota. After postdoctoral training, he joined Baylor College of Medicine where he is now a Professor and Director of the Center on Addiction, Learning, Memory. He serves on the editorial boards of a number of journals and has received awards, including the Jacob Javits Neuroscience Award from the NIH. This summer he will become Chair of the Department of Neuroscience and Director of the Mahoney Institute of Neuroscience at the University of Pennsylvania School of Medicine, Philadelphia, P A, USA