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| About Ann Richard (US Environmental Protection Agency) |
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Dr. Ann Richard obtained her Ph.D. from UNC-Chapel Hill in Physical Chemistry in 1983. She was a Principal Research Investigator in the Environmental Carcinogenesis Division, National Health and Environmental Effects Research Laboratory of the US EPA in RTP from 1987-2005. She is currently on the scientific staff of the newly formed National Center for Computational Toxicology within ORD. Her research activities have involved the application of computational chemistry methods to developing structure-activity relationships (SAR) in environmental toxicology, and the review and critique of structure-based predictive toxicology methods. She has published over 50 articles, and has been on the editorial boards of Mutation Research and Chemical Research in Toxicology. She has developed the DSSTox Database Network and public website to improve the accessibility and standardization of public toxicity data. This effort is providing a foundation for improved chemoinformatics capabilities, SAR model development, and broader integration of legacy toxicity data with newer high-throughput screening and toxicogenomics data.
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EPA DSSTox and ToxCastTM Project Updates: Generating New Data and Linkages in Support of Public Toxico-Cheminformatics Efforts
Ann Richard (1), Maritja Wolf (2), Thomas Transue (2), ClarLynda Williams-Devane (3), and Richard Judson (1)
(1) National Center for Computational Toxicology, US EPA, RTP, NC 27711; (2) Lockheed Martin – Contractor to the US EPA, RTP, NC 27711; (3) NC State Univ. Bioinformatics Graduate Program, US EPA Student COOP, RTP, NC 27711
EPA’s National Center for Computational Toxicology is generating data and capabilities to support a new paradigm for toxicity screening and prediction. The DSSTox project is improving public access to quality structure-annotated chemical toxicity information in less summarized forms than traditionally employed in SAR modeling, and in ways that facilitate data-mining and data read-across. The DSSTox Structure-Browser provides structure searchability across the full published DSSTox toxicity-related inventory, enables linkages to and from previously isolated toxicity data resources (soon to include public microarray resources GEO, ArrayExpress, and CEBS), and provides link-outs to cross-indexed public resources such as PubChem, ChemSpider, and ACToR. The published DSSTox inventory and bioassay information also have been integrated into PubChem allowing a user to take full advantage of PubChem structure-activity and bioassay clustering features. Phase I of the ToxCastTM project has generated high-throughput screening (HTS) data from several hundred biochemical and cell-based assays for a set of 320 chemicals, mostly pesticide actives, with rich toxicology profiles. DSSTox and ACToR are providing the primary cheminformatics support for ToxCastTM and collaborative efforts with the National Toxicology Program’s HTS Program and the NIH Chemical Genomics Center. DSSTox will also be a primary vehicle for publishing ToxCastTM ToxRef summarized bioassay data for use by modelers. Incorporating and expanding traditional SAR concepts into this new high-throughput and data-rich world pose conceptual and practical challenges, but also offer great promise for improving predictive capabilities. This work was reviewed by EPA and approved for publication, but does not necessarily reflect EPA policy.
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