建構虛擬斑馬魚系統以研析化合物毒性
Developing a Virtual Zebrafish System for Studying Chemical Toxicity
Among new approach methodologies, computational toxicology models can provide fast and economic evaluation of toxicity with increasing regulatory acceptance. Despite of the extensive use of quantitative structure-activity relationship (QSAR) models for toxicity evaluation, it is difficult to validate the results generated from traditional QSAR models due to the lack of toxicity mechanism information of the prediction results. To improve the regulatory acceptance and model usefulness, our group developed mechanism-based models for the prediction of skin sensitization, developmental and reproductive toxicity, carcinogenicity, and neurotoxicity. While the models provide verifiable mechanism information with better performance and regulatory acceptance, only known mechanisms were considered individually in the models leading to potential false predictions. To provide complimentary toxicity information of a whole organism, we then developed a novel Virtual Zebrafish system to predict the overall influence on zebrafish including mortality, morphology, and behavioral effects. Zebrafish as a very important model organism can provide organism-level toxicity information to comprehend toxicity evaluation for complex endpoints. The Virtual Zebrafish system integrates QSAR and in silico toxicogenomics models to predict drug effects and ensure safety efficiently. The predicted effects can be further utilized to develop prediction methods and weight-of-evidence models for complex toxicity endpoints. The developed models for complex toxicity endpoints based on virtual zebrafish offer interpretable information of the mechanism that is favored by regulatory agencies. An online system will be developed to provide access to the developed models that can be applied to drug development and chemical hazard identification.