The "ups and downs" of signaling cascades in addiction - PubMed (original) (raw)
Review
. 2005 Nov 8;2005(309):re14.
doi: 10.1126/stke.3092005re14.
Affiliations
- PMID: 16278489
- DOI: 10.1126/stke.3092005re14
Review
The "ups and downs" of signaling cascades in addiction
Dorit Ron et al. Sci STKE. 2005.
Abstract
Drug addiction is a chronic disease characterized by compulsive drug use despite the severe negative consequences associated with it. Repeated exposure to drugs of abuse results in molecular adaptations in neuronal signaling pathways, which eventually manifest in the complex behavioral alterations that characterize addiction. These include tolerance, sensitization, dependence, drug craving, and relapse. In this Review, we focus on recent studies highlighting signaling cascades initiated by cocaine, as a representative of a drug of abuse with a defined site of action, and alcohol, as a drug with an undefined primary site of action. Specifically, we describe recent studies that emphasize the role of protein-protein interactions, phosphorylation, and compartmentalization in the molecular mechanisms that result in the cellular and behavioral adaptations that underlie addiction. Signaling cascades that contribute to addiction, as well as those that protect or delay the development of addiction, are presented.
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