Proteins differentially expressed in response to nicotine in five rat brain regions: identification using a 2-DE/MS-based proteomics approach

Proteomics
Yoon Y Hwang, Ming D Li

Abstract

To determine protein expression patterns within the central nervous system (CNS) in response to nicotine, 2-DE/MS was performed on samples from five brain regions of rats that had received nicotine bitartrate by osmotic minipump infusion at a dose of 3.15 mg/kg/day for 7 days. After spot matching and statistical analysis, 41 spots in the amygdala, 49 in the nucleus accumbens (NA), 46 in the prefrontal cortex (PFC), 36 in the striatum, and 28 in the ventral tegmental area (VTA) showed significant differences in the nicotine-treated compared with control samples. Using MALDI-TOF MS peptide fingerprinting, 14 proteins in the amygdala, 11 in the NA, 19 in the PFC, 13 in the striatum, and 19 in the VTA were identified. Several proteins (e.g. dynamin 1, laminin receptors, aldolase A, enolase 1 alpha, Hsc70-ps1, and N-ethylmaleimide-sensitive fusion protein) were differentially expressed in multiple brain regions. By gene ontology analysis, these differentially expressed proteins were grouped into biological process categories, such as energy metabolism, synaptic function, and oxidative stress metabolism. These data, in combination with microarray analysis of mRNA transcripts, have the potential to identify the CNS gene products that ...Continue Reading

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