title: Quantitative proteomic characterization of ethanol-responsive pathways in rat microglial cells.
abstract: Long-term exposure to alcohol can have profound effects on the central nervous system including pathophysiological consequences associated with neuroinflammation. Along with astroglia, microglia play an important role in the neuroinflammatory response. Using a SILAC-labeled rat microglial cell line, an expression profile of 2994 proteins was identified in ethanol-treated microglial cells, where 160 and 69 protein groups were determined to be significantly upregulated and downregulated, respectively. In addition, SILAC-based proteomic analysis of lipopolysaccharide-treated microglial cells was performed in order to generate a reference data set representing a "classical" (M1) macrophage activation response in order to compare to the differential protein expression profile of ethanol-treated microglia. On the basis of this comparison as well as other validation experiments performed in this study, ethanol appears to induce partial activation of microglia that is devoid of conventional markers that indicate an M1 phenotype. This study is the first comprehensive proteomic analysis to assess the impact of acute ethanol exposure on microglial function and will provide a significant foundation that includes novel protein markers for future work aimed to characterize the molecular mechanisms associated with ethanol-induced microglial activation and its role in neurodegeneration.
authors.affiliation: Department of Cell Biology, Microbiology, and Molecular Biology, University of South Florida, 4202 East Fowler Avenue, Tampa, Florida 33620, USA.
authors.forename: Harris
authors.initials: H
authors.lastname: Bell-Temin
authors.forename: Ping
authors.initials: P
authors.lastname: Zhang
authors.forename: Dale
authors.initials: D
authors.lastname: Chaput
authors.forename: Michael A
authors.initials: MA
authors.lastname: King
authors.forename: Min
authors.initials: M
authors.lastname: You
authors.forename: Bin
authors.initials: B
authors.lastname: Liu
authors.forename: Stanley M
authors.initials: SM
authors.lastname: Stevens
mesh_terms: D000437:Alcoholism / Q000378:metabolism / Q000473:pathology; D000818:Animals; D002478:Cells, Cultured; D002492:Central Nervous System Depressants / Q000633:toxicity*; D016207:Cytokines / Q000235:genetics / Q000378:metabolism; D042967:Electron Transport Complex I / Q000378:metabolism; D000431:Ethanol / Q000633:toxicity*; D015870:Gene Expression / Q000187:drug effects / Q000276:immunology; D006801:Humans; D008070:Lipopolysaccharides / Q000494:pharmacology; D017628:Microglia / Q000187:drug effects / Q000276:immunology / Q000378:metabolism*; D009419:Nerve Tissue Proteins / Q000378:metabolism*; D052247:Nitric Oxide Synthase Type II / Q000378:metabolism; D020543:Proteome / Q000378:metabolism*; D040901:Proteomics; D051381:Rats; D015398:Signal Transduction
chemical_list: D002492:Central Nervous System Depressants; D016207:Cytokines; D008070:Lipopolysaccharides; D009419:Nerve Tissue Proteins; D020543:Proteome; D000431:Ethanol; D052247:Nitric Oxide Synthase Type II; C496318:Nos2 protein, rat; D042967:Electron Transport Complex I