Journal Article

Proteomics Analysis of Dorsal Striatum Reveals Changes in Synaptosomal Proteins following Methamphetamine Self-Administration in Rats

Kivell, Bronwyn M., Bosch, Peter J., Peng, Lifeng

2015

Overview

Methamphetamine is a widely abused, highly addictive drug. Regulation of synaptic proteins within the brain's reward pathway modulates addiction behaviours, the progression of drug addiction and long-term changes in brain structure and function that result from drug use. Therefore, using large scale proteomics studies we aim to identify global protein expression changes within the dorsal striatum, a key brain region involved in the modulation of addiction. We performed LC-MS/MS analyses on rat striatal synaptosomes following 30 days of methamphetamine self-administration (2 hours/day) and 14 days abstinence. We identified a total of 84 differentially-expressed proteins with known roles in neuroprotection, neuroplasticity, cell cytoskeleton, energy regulation and synaptic vesicles. We identify significant expression changes in stress-induced phosphoprotein and tubulin polymerisation-promoting protein, which have not previously been associated with addiction. In addition, we confirm the role of amphiphysin and phosphatidylethanolamine binding protein in addiction. This approach has provided new insight into the effects of methamphetamine self-administration on synaptic protein expression in a key brain region associated with addiction, showing a large set of differentially-expressed proteins that persist into abstinence. The mass spectrometry proteomics data are available via ProteomeXchange with identifier PXD001443.

• Publisher: Public Library of Science,Public Library of Science (PLoS)
• Subject: Addictions / Amphetamines / Animals / Biology / Brain / Brain research / Catheters / Caudate-putamen / Central Nervous System Stimulants - administration & dosage / Cocaine / Corpus Striatum - drug effects / Corpus Striatum - metabolism / Cytoskeleton / Dopamine / Drug abuse / Drug addiction / Drug dosages / Experiments / Functional anatomy / Health aspects / Male / Mass spectrometry / Mass spectroscopy / Methamphetamine / Methamphetamine - administration & dosage / Neostriatum / Neuroplasticity / Neuroprotection / Neurosciences / Oxidative stress / Phosphatidylethanolamine / Phosphoproteins / Physiological aspects / Physiology / Polymerization / Protein expression / Proteins / Proteomics / Rats / Rats, Sprague-Dawley / Reinforcement / Rodents / Scientific imaging / Self Administration / Striatum / Structure-function relationships / Studies / Synaptic plasticity / Synaptic vesicles / Synaptosomes / Synaptosomes - drug effects / Synaptosomes - metabolism / Tandem Mass Spectrometry / Tubulin