title: Differentially expressed genes of Tetrahymena thermophila in response to tributyltin (TBT) identified by suppression subtractive hybridization and real time quantitative PCR.
abstract: Tributyltin (TBT) is widely used as antifouling paints, agriculture biocides, and plastic stabilizers around the world, resulting in great pollution problem in aquatic environments. However, it has been short of the biomonitor to detect TBT in freshwater. We constructed the suppression subtractive hybridization library of Tetrahymena thermophila exposed to TBT, and screened out 101 Expressed Sequence Tags whose expressions were significantly up- or down-regulated with TBT treatment. From this, a series of genes related to the TBT toxicity were discovered, such as glutathione-S-transferase gene (down-regulated), plasma membrane Ca2+ ATPase isoforms 3 gene (up-regulated) and NgoA (up-regulated). Furthermore, their expressions under different concentrations of TBT treatment (0.5-40 ppb) were detected by real time fluorescent quantitative PCR. The differentially expressed genes of T. thermophila in response to TBT were identified, which provide the basic to make Tetrahymena as a sensitive, rapid and convenient TBT biomonitor in freshwater based on rDNA inducible expression system.
authors.affiliation: State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, PR China.
authors.forename: Lifang
authors.initials: L
authors.lastname: Feng
authors.forename: Wei
authors.initials: W
authors.lastname: Miao
authors.forename: Yuxuan
authors.initials: Y
authors.lastname: Wu
mesh_terms: D000818:Animals; D001483:Base Sequence; D017931:DNA Primers / Q000737:chemistry; D020224:Expressed Sequence Tags / Q000737:chemistry; D015870:Gene Expression / Q000187:drug effects*; D017125:Genes, Protozoan / Q000187:drug effects; D008969:Molecular Sequence Data; D016133:Polymerase Chain Reaction / Q000662:veterinary; D016808:Tetrahymena thermophila / Q000187:drug effects* / Q000235:genetics; D014220:Trialkyltin Compounds / Q000633:toxicity*; D014874:Water Pollutants, Chemical / Q000633:toxicity*
chemical_list: D017931:DNA Primers; D014220:Trialkyltin Compounds; D014874:Water Pollutants, Chemical; C011559:tributyltin