Integration of QSAR and In Vitro Toxicology

Abstract

The principles of quantitative structure-activity relationships (QSAR) are based on the premise that the properties of a chemical are implicit in its molecular structure. Therefore, if a mechanistic .hypothesis can be proposed linking a group of related chemicals with a particular toxic end point, the hypo.hesis can be used to define relevant parameters to establish a QSAR. Ways in which OSAR and in vitro toxicology can complement each other in development of alternatives to live animal experiments are described and illustrated by examples from acute toxicological end points. Integration of QSAR and in vitro methods is examined in the context of assessing mechanistic competence and improving the design of in vitro assays and the development of prediction models. The nature of biological variability is explored together with its implications for the selection of sets of chemicals for test development, optimization, and validation. Methods are described to support the use of data from in vivo tests that do not meet today's stringent requirements of acceptability. Integration of QSAR and in vitro methods into strategic approaches for the replacement, reduction, and refinement of the use of animals is described with examples.-Environ Health Perspect 106(Suppl 2): 459-465 (1998). http://ehpnetl.niehs.nih.gov/ docs/1998/Suppl-2/459-465barrattlabstract.html

Safety evaluation of preservatives

“…QSAR models will most certainly be involved in the design of future preservatives. In addition, QSARs and in vitro toxicology can complement each other in order to assess toxicity as alternatives to live-animal experiments [27]. A major limitation is the mechanistic understanding of many toxicological phenomena.…”

Safety evaluation of preservatives

“…QSAR models will most certainly be involved in the design of future preservatives. In addition, QSARs and in vitro toxicology can complement each other in order to assess toxicity as alternatives to live-animal experiments [27]. A major limitation is the mechanistic understanding of many toxicological phenomena.…”

Chapter 4: Requirements Concerning Antiseptics for Periorbital, Orbital and Intraorbital Application. 4.2.: Local Tolerance

“…In previous years it was suggested that more basic approaches such as mathematical models of physicochemical interactions, analysis of isolated molecular reactions or subcellular preparations such as mitochondria or lysosomes and integration of the analysis of quantitative structure-activity relationships (QSAR) for prediction of toxicity [7] would be used more frequently for predicting toxicity in vivo in the future. With the so-called membrane-interaction QSAR model, which was developed in 1999, it is possible to classify compounds of low-and high-predicted eye irritation scores [41].…”

Safety evaluation of preservatives

“…QSAR models will most certainly be involved in the design of future preservatives. In addition, QSARs and in vitro toxicology can complement each other in order to assess toxicity as alternatives to live-animal experiments [27]. A major limitation is the mechanistic understanding of many toxicological phenomena.…”

Chapter 4: Requirements Concerning Antiseptics for Periorbital, Orbital and Intraorbital Application. 4.2.: Local Tolerance

“…In previous years it was suggested that more basic approaches such as mathematical models of physicochemical interactions, analysis of isolated molecular reactions or subcellular preparations such as mitochondria or lysosomes and integration of the analysis of quantitative structure-activity relationships (QSAR) for prediction of toxicity [7] would be used more frequently for predicting toxicity in vivo in the future. With the so-called membrane-interaction QSAR model, which was developed in 1999, it is possible to classify compounds of low-and high-predicted eye irritation scores [41].…”

Safety evaluation of preservatives

“…QSAR models will most certainly be involved in the design of future preservatives. In addition, QSARs and in vitro toxicology can complement each other in order to assess toxicity as alternatives to live-animal experiments [27]. A major limitation is the mechanistic understanding of many toxicological phenomena.…”

Chapter 4: Requirements Concerning Antiseptics for Periorbital, Orbital and Intraorbital Application. 4.2.: Local Tolerance

“…In previous years it was suggested that more basic approaches such as mathematical models of physicochemical interactions, analysis of isolated molecular reactions or subcellular preparations such as mitochondria or lysosomes and integration of the analysis of quantitative structure-activity relationships (QSAR) for prediction of toxicity [7] would be used more frequently for predicting toxicity in vivo in the future. With the so-called membrane-interaction QSAR model, which was developed in 1999, it is possible to classify compounds of low-and high-predicted eye irritation scores [41].…”