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Aflatoxins are the most popular hepatotoxicants. Chronic exposure to aflatoxins leads to a wide variety of liver diseases, such as hepatocellular carcinoma. In this study, we analyzed the genome wide expression profiles of aflatoxin B1-induced rat hepatic epithelial cells. The expression of 325, 184 and 199 special genes was altered when exposed to 0.03, 0.1 and 0.2 μmol/L aflatoxin B1 respectively, and 239 genes were commonly expressed. After the functional analysis on these dose-special genes, we determined several key pathways related to hepatotoxicity, such as TGF-beta signaling pathway, tight junction, adherens junction, the regulation of actin cytoskeleton, Erb B signaling pathway, p53 signaling pathway, pathways in cancer and axon guidance. Common genes were mainly associated with focal adhesion, ECM-receptor interaction, and cell adhesion molecules. Gene ontology annotations showed a good concordance with these pathways. The quantitative real-time polymerase chain reaction(PCR) analysis of selected genes showed similar patterns in microarrays. The toxicogenomic study provides a better understanding of molecular mechanisms of aflatoxins. 相似文献
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At the University of California, Los Angeles The Genome: Blueprint, Controversy, Destiny is an inquiry-based course with a laboratory component, designed for non-science majors. The course explores the many ways in which molecular biology—including the Human Genome Project, genetically modified foods, gene therapy, and forensics—is increasingly permeating society in the 21st century. The laboratory component of the course includes experience in real research—the sequencing of a microbial genome. Students feel, think, and act like scientists while they consider the societal implications of the technology. The course aims to prepare students to be scientifically literate citizens while simultaneously building a major research accomplishment. 相似文献
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