Studies on the biological effects and mode of action of pollutants in marine animals

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We obtained gene expression profile data from ascidians after exposure to organotin compounds, metal ions, or endocrine disruptors for 72h. We then categorized the up- or down-regulated genes for each pollutant using our classification method, and estimated the biological effects of each pollutant. We developed high-throughput methods for screening embryogenesis and metamorphosis using ascidian eggs and larva, and analyzed the inhibitory effects of each pollutant. Furthermore, we found nine marker genes for monitoring environmental contamination due to organotins.