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- W2912562616 abstract "Since the EU banned animal testing for cosmetic products and ingredients in 2013, many defined approaches (DA) for skin sensitization assessment have been developed. Machine learning models were shown to be effective in DAs, but the predictivity might be affected by data imbalance (i.e., more sensitizers than non-sensitizers) and limited information in the databases. To improve the predictivity of DAs, we attempted to apply data-rebalancing ensemble learning (bagging with support vector machine (SVM)) and a novel and comprehensive Cosmetics Europe database. For predicting human hazard and three-class potency, 12 models were built for each using a training set of 96 substances and a test set of 32 substances from the database. The model that predicted hazard with the highest accuracy (90.63% for the test set and 88.54% for the training set, named hazard-DA) used SVM-bagging with combinations of all variables (V6), while the model that predicted potency with the highest accuracy (68.75% for the test set and 82.29% for the training set, named potency-DA) used SVM alone. Both DAs showed better performance than LLNA and other machine learning-based DAs, and the potency-DA provided more in-depth assessment. These findings indicate that SVM-bagging-based DAs provide enhanced predictivity for hazard assessment by further data rebalancing. Meanwhile, the effect of imbalanced data might be offset by more detailed categorization of sensitizers for potency assessment, thus SVM-based DA without bagging could provide sufficient predictivity. The improved DAs in this study could be promising tools for skin sensitization assessment without animal testing." @default.
- W2912562616 created "2019-02-21" @default.
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- W2912562616 date "2019-01-01" @default.
- W2912562616 modified "2023-10-05" @default.
- W2912562616 title "Improved defined approaches for predicting skin sensitization hazard and potency in humans" @default.
- W2912562616 doi "https://doi.org/10.14573/altex.1809191" @default.
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