Abstract
Annual Review of Pharmacology and Toxicology
Vol. 47:
681-698
(Volume publication date February 2007)
(doi:10.1146/annurev.pharmtox.47.120505.105140)
New Insights into the Mechanism of Action of Amphetamines Annette E. Fleckenstein, Trent J. Volz, Evan L. Riddle, James W. Gibb, and Glen R. HansonDepartment of Pharmacology and Toxicology, University of Utah, Salt Lake City, Utah 84112 email: fleckenstein@hsc.utah.edu Abstract Amphetamine is a psychostimulant commonly used to treat several disorders, including attention deficit, narcolepsy, and obesity. Plasmalemmal and vesicular monoamine transporters, such as the neuronal dopamine transporter and the vesicular monoamine transporter-2, are two of its principal targets. This review focuses on new insights, obtained from both in vivo and in vitro studies, into the molecular mechanisms whereby amphetamine, and the closely related compounds methamphetamine and methylenedioxymethamphetamine, cause monoamine, and particularly dopamine, release. These mechanisms include amphetamine-induced exchange diffusion, reverse transport, and channel-like transport phenomena as well as the weak base properties of amphetamine. Additionally, amphetamine analogs may affect monoamine transporters through phosphorylation, transporter trafficking, and the production of reactive oxygen and nitrogen species. All of these mechanisms have potential implications for both amphetamine- and methamphetamine-induced neurotoxicity, as well as dopaminergic neurodegenerative diseases. Approaches to measuring the effects of wake-promoting drugs: a focus on cognitive function Human Psychopharmacology: Clinical and Experimental 24(5):371-389 (2009) The molecular chaperone Hsc70 interacts with the vesicular monoamine transporter-2 Journal of Neurochemistry 110(2):581-594 (2009) Increases in cytoplasmic dopamine compromise the normal resistance of the nucleus accumbens to methamphetamine neurotoxicity Journal of Neurochemistry 109(6):1745-1755 (2009) Effects of amphetamine on salivary secretion European Journal of Oral Sciences 117(3):218-223 (2009) Melatonin reduces induction of Bax, caspase and cell death in methamphetamine-treated human neuroblastoma SH-SY5Y cultured cells Journal of Pineal Research 46(4):433-440 (2009)
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