title: Differential proteins of the optic ganglion in octopus vulgaris under methanol stress revealed using proteomics.
abstract: An analytical approach using the two-dimensional polyacrylamide gel electrophoresis (2D-PAGE) technique separated the proteome from the optic ganglia of Octopus vulgaris (OVOG). Approximately 600 protein spots were detected from the extraction when applying 150 μg protein to a 2D-PAGE gel in the pH range 5.0-8.0. Compared to the control, significant changes of 18 protein spots were observed in OVOG under the stress of native seawater containing 2% methanol for 72 h. Among these spots, we found that eight were down-regulated and ten were up-regulated in the gels, which were further identified using both peptide mass fingerprinting and database searches. Significant proteins such as glyceraldehyde-3-phosphate dehydrogenase, alpha subunit of succinyl-CoA synthetase, alcohol dehydrogenase, and long-chain specific acyl-CoA dehydrogenase were up-regulated proteins, whereas putative ABC transporter was a down -regulated protein. These differential proteins at the level of subcellular localization were further classified using LOCtree software with a hierarchical system of support vector machines. We found that most of the differential proteins in the gel could be identified as mitochondrial proteins, suggesting that these protective or marker proteins might help to prevent methanol poisoning via the mitochondria in the optical ganglia. The results indicated that both beta-tubulin and beta-actin were potential biomarkers as up-regulated proteins for monitoring methanol toxicosis associated with fish foods such as octopus and shark.
authors: Department of Biochemistry and Biotechnology, School of Life Sciences, Xiamen University, Xiamen 361005, China.
authors: Lin
authors: L
authors: Huang
authors: Qing-Yu
authors: QY
authors: Huang
authors: Hai-Bin
authors: HB
authors: Chen
authors: Fu-Sheng
authors: FS
authors: Huang
authors: He-Qing
authors: HQ
authors: Huang
mesh_terms: D018528:ATP-Binding Cassette Transporters / Q000235:genetics / Q000378:metabolism; D000199:Actins / Q000235:genetics / Q000378:metabolism; D044944:Acyl-CoA Dehydrogenases / Q000235:genetics / Q000378:metabolism; D000426:Alcohol Dehydrogenase / Q000235:genetics / Q000378:metabolism; D000818:Animals; D015415:Biomarkers / Q000378:metabolism*; D015536:Down-Regulation; D015180:Electrophoresis, Gel, Two-Dimensional; D017950:Ganglia, Sensory / Q000187:drug effects* / Q000378:metabolism; D020869:Gene Expression Profiling / Q000379:methods*; D053263:Gene Regulatory Networks; D005987:Glyceraldehyde-3-Phosphate Dehydrogenases / Q000235:genetics / Q000378:metabolism; D000432:Methanol / Q000009:adverse effects; D049831:Octopodiformes / Q000187:drug effects / Q000235:genetics*; D009900:Optic Nerve / Q000187:drug effects* / Q000378:metabolism; D010449:Peptide Mapping; D020543:Proteome / Q000032:analysis* / Q000235:genetics; D040901:Proteomics / Q000379:methods*; D060388:Support Vector Machine; D014404:Tubulin / Q000235:genetics / Q000378:metabolism; D015854:Up-Regulation
chemical_list: D018528:ATP-Binding Cassette Transporters; D000199:Actins; D015415:Biomarkers; D020543:Proteome; D014404:Tubulin; D000426:Alcohol Dehydrogenase; D005987:Glyceraldehyde-3-Phosphate Dehydrogenases; D044944:Acyl-CoA Dehydrogenases; D000432:Methanol