The EU-REACH regulation encourages the use of alternative in vitro and in silico methods in order to minimize animal testing, costs and time. Among these, quantitative structure-activity relationships (QSARs) represent a useful tool to predict unknown activities/properties for existing or even not yet synthesized chemicals. The development and validation of QSAR models for four classes of emerging pollutants (brominated flame retardants, fragrances, perfluorinated compounds and (benzo)triazoles) is the central topic of Work Package 3 (WP3) within the FP7 European project CADASTER. The final goal of the project is to exemplify the integration of information, models and strategies for carrying out hazard and risk assessments for large numbers of substances, organized in the four representative chemical classes. The aim of this poster is to summarize the WP3 activities within CADASTER project and the QSAR models developed so far for the four classes of compounds under investigation. This modeling activity involved different project partners in universities and research institutes across Europe and was realized by different modeling approaches. For each class, ad hoc QSARs were developed for the available endpoints (physico-chemical properties, eco- and mammalian toxicity) in order to characterize environmental behavior and activity profile of the chemicals. In agreement with the OECD principles for the validation of QSARs for regulatory purposes, all the proposed models were checked for their robustness, external predictivity and applicability domain. QSAR predictions, together with structural analysis (similarity analysis and multivariate ranking methods), were used for the identification of priority compounds to optimize the experimental testing.
QSAR and QSPR models for emerging pollutants: WP3 activities within the FP7 European Project CADASTER
KOVARICH, SIMONA;BHHATARAI, BARUN;PAPA, ESTER;GRAMATICA, PAOLA
2011-01-01
Abstract
The EU-REACH regulation encourages the use of alternative in vitro and in silico methods in order to minimize animal testing, costs and time. Among these, quantitative structure-activity relationships (QSARs) represent a useful tool to predict unknown activities/properties for existing or even not yet synthesized chemicals. The development and validation of QSAR models for four classes of emerging pollutants (brominated flame retardants, fragrances, perfluorinated compounds and (benzo)triazoles) is the central topic of Work Package 3 (WP3) within the FP7 European project CADASTER. The final goal of the project is to exemplify the integration of information, models and strategies for carrying out hazard and risk assessments for large numbers of substances, organized in the four representative chemical classes. The aim of this poster is to summarize the WP3 activities within CADASTER project and the QSAR models developed so far for the four classes of compounds under investigation. This modeling activity involved different project partners in universities and research institutes across Europe and was realized by different modeling approaches. For each class, ad hoc QSARs were developed for the available endpoints (physico-chemical properties, eco- and mammalian toxicity) in order to characterize environmental behavior and activity profile of the chemicals. In agreement with the OECD principles for the validation of QSARs for regulatory purposes, all the proposed models were checked for their robustness, external predictivity and applicability domain. QSAR predictions, together with structural analysis (similarity analysis and multivariate ranking methods), were used for the identification of priority compounds to optimize the experimental testing.
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