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• W2972815212 abstract "The aim of human toxicity risk assessment is to determine a safe dose or exposure to a chemical for humans. This requires an understanding of the exposure of a person to a chemical and how much of the chemical is required to cause an adverse effect. To do this computationally, we need to understand how much of a chemical is required to perturb normal biological function in an adverse outcome pathway (AOP). The molecular initiating event (MIE) is the first step in an adverse outcome pathway and can be considered as a chemical interaction between a chemical toxicant and a biological molecule. Key chemical characteristics can be identified and used to model the chemistry of these MIEs. In this study, we do just this by using chemical substructures to categorize chemicals and 3D quantitative structure–activity relationships (QSARs) based on comparative molecular field analysis (CoMFA) to calculate molecular activity. Models have been constructed across a variety of human biological targets, the glucocorticoid receptor, mu opioid receptor, cyclooxygenase-2 enzyme, human ether-à-go-go related gene channel, and dopamine transporter. These models tend to provide molecular activity estimation well within one log unit and electronic and steric fields that can be visualized to better understand the MIE and biological target of interest. The outputs of these fields can be used to identify key aspects of a chemical’s chemistry which can be changed to reduce its ability to activate a given MIE. With this methodology, the quantitative chemical activity can be predicted for a wide variety of MIEs, which can feed into AOP-based chemical risk assessments, and understanding of the chemistry behind the MIE can be gained." @default.
• W2972815212 created "2019-09-19" @default.
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• W2972815212 date "2019-09-13" @default.
• W2972815212 modified "2023-09-29" @default.
• W2972815212 title "Quantitative Predictions for Molecular Initiating Events Using Three-Dimensional Quantitative Structure–Activity Relationships" @default.
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• W2972815212 doi "https://doi.org/10.1021/acs.chemrestox.9b00136" @default.
• W2972815212 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/31517476" @default.
• W2972815212 hasPublicationYear "2019" @default.
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