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题目:: Pharmaceutical industry effluent diluted 1:500 affects gene expression, CYP1A activity and plasma phosphate in fish
ID:
状态:: 发布时间June 24, 2010 , 更新时间 June 10, 2011 , 提交时间 March 5, 2009,
物种:: Oncorhynchus mykiss
摘要:: Patancheru, near Hyderabad, India, is a major production site for the global bulk drug market. About 90 manufacturers send their wastewater to a common treatment plant in Patancheru. Extraordinary high levels of a wide range of pharmaceuticals have recently been demonstrated in the treated effluent. As little as 0.2% of this effluent can strongly reduce the growth rate of tadpoles, but the underlying mechanisms of toxicity are not known. To begin addressing how the effluent affects aquatic vertebrates, rainbow trout (Oncorhynchus mykiss) were exposed to 0.2% effluent for five days. Several physiological endpoints, together with effects on global hepatic gene expression patterns, were analyzed. The exposed fish showed both an induction of hepatic cytochrome P450 1A (CYP1A) gene expression, as well as EROD activity. Clinical blood chemistry analyses revealed an increase in plasma phosphate levels, which in humans indicates impaired kidney function. Several oxidative stress-related genes were induced in the livers, however, no significant changes in antioxidant enzyme activities or in the hepatic glutathione levels were found. Furthermore, estrogen-regulated genes were slightly up-regulated following exposure, and moderate levels of estriol were detected in the effluent. This study identifies changes in gene expression triggered by exposure to a high dilution of the effluent, supporting the hypothesis that these fish are responding to chemical exposure. The pattern of regulated genes may contribute to the identification of mechanisms of sub-lethal toxicity, as well as illuminate possible causative agents. Two exposure experiments were conducted with control fish and fish exposed to 0.2% effluent. 19 pools of RNA, each containing three fish, were hybrdizied to in situ synthesized custom-made oligonucleotide microarrays. In total, four exposed and four control pools from exposure experiment I and five exposed and six control pools from exposure experiment II were analyzed.
实验种类:: transcription profiling by array
样本量:: 19
实验设计:
: 无设计数据
数据号:: E-GEOD-15124, GSE15124
数据状态:: 无法自动分析，您可以尝试手动分析数据。

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