Application of Sparse Sampling Approaches in Rodent Toxicokinetics: A Prospective View

Autor: Jean-Louis Steimer, Joost van Bree, Jerry Nedelman, Werner Niederberger, William T. Robinson, Francis L. S. Tse
Rok vydání: 1994
Předmět:
Zdroj: Drug Information Journal. 28:263-279
ISSN: 0092-8615
DOI: 10.1177/009286159402800134
Popis: In toxicology experiments in rodents, separate animals in satellite groups are routinely incorporated to assess the pharmacokinetic (toxicokinetic) characteristics of the drug. This approach has two major drawbacks: 1. limited or no individual exposure estimates are obtained for the animals used in the toxicological evaluation, preventing a quantitative assessment of the concentration/(tox)effect relationship, and 2. the use of satellite animals increases the number of animals and workload involved in a toxicological study. The combined use of sparse sampling and mixed-effects modeling is proposed to overcome these disadvantages. Depending on the specific objectives of the study, a pharmacokinetic-model-independent or a pharmacokinetic-model-dependent approach can be used. The former is based on appropriate transformation of the concentration data. A general linear model type of methodology, relating the main study variables such as dose level, time, and gender directly to the transformed concentrations, ...
Databáze: OpenAIRE