title: Analysis of proteins expressed in rat plasma exposed to dioxin using 2-dimensional gel electrophoresis.
abstract: Dioxins are a class of polyhalogenated aromatic hydrocarbons that induces a wide spectrum of toxic responses in animals. In this study, two groups of Sprague-Dawley rats were exposed to 2,3,7,8-tetrachlorobenzo-p-dioxin (TCDD); one group received short-term exposure at a single dose of 1, 10, 20 or 50 microg/kg body weight and the other received long-term exposure to a daily low dose of 0.01, 0.1, 1 or 2.5 microg/kg body weight for one month. Two-dimensional electrophoresis was utilized to resolve the protein profile of rat plasma exposed to TCDD at different doses. One novel and three volume-increased spots were identified and characterized by matrix-assisted laser desorption/ionization-time of flight mass spectrometry and electrospray-ionization on quadropole-TOF2 mass spectrometry. The novel protein was identified as plasma glutathione peroxidase precursor and the volume-increased proteins were cytokeratin 8 polypeptide, Ig lambda-1 chain C region and Ig lambda-2 chain C region. These proteins may be used as biomarkers to diagnose dioxin exposure and may help in understanding the toxic effects of dioxins.
authors.affiliation: Graduate School of Life Sciences and Biotechnology, Korea University, 1, 5-ka Anam-dong, Sungbuk-ku, Seoul 136-701, Korea.
authors.forename: Won-Kyu
authors.initials: WK
authors.lastname: Son
authors.forename: Do-Youn
authors.initials: DY
authors.lastname: Lee
authors.forename: Sung-Han
authors.initials: SH
authors.lastname: Lee
authors.forename: Won-A
authors.initials: WA
authors.lastname: Joo
authors.forename: Chan-Wha
authors.initials: CW
authors.lastname: Kim
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D001798:Blood Proteins / Q000032:analysis; D015180:Electrophoresis, Gel, Two-Dimensional; D008969:Molecular Sequence Data; D000072317:Polychlorinated Dibenzodioxins / Q000008:administration & dosage / Q000494:pharmacology*; D020543:Proteome / Q000032:analysis* / Q000187:drug effects; D051381:Rats; D017207:Rats, Sprague-Dawley; D021241:Spectrometry, Mass, Electrospray Ionization; D019032:Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization
chemical_list: D001798:Blood Proteins; D000072317:Polychlorinated Dibenzodioxins; D020543:Proteome