Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Ancillary approaches to toxicokinetic evaluations

A R Takacs1

  • 1R. W. Johnson Pharmaceutical Research Institute, Spring House, Pennsylvania 19477, USA.

Toxicologic Pathology
|March 1, 1995
PubMed
Summary

Toxicokinetic studies assess systemic exposure during nonclinical toxicity testing. Ancillary studies, including retrospective designs, provide crucial data for decision-making when initial toxicity assessments are insufficient.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

In vitro metabolism of mifepristone (RU-486) in rat, monkey and human hepatic S9 fractions: identification of three new mifepristone metabolites.

Xenobiotica; the fate of foreign compounds in biological systems·1999
Same author

Biotransformation of the antipsychotic agent, mazapertine, in dog--mass spectral characterization and identification of metabolites.

Xenobiotica; the fate of foreign compounds in biological systems·1999
Same author

Pharmacokinetics and bioavailability of topiramate in the beagle dog.

Drug metabolism and disposition: the biological fate of chemicals·1995
See all related articles

Area of Science:

  • Pharmacology
  • Toxicology
  • Drug Development

Background:

  • Toxicokinetic studies are essential for evaluating systemic exposure to test compounds in nonclinical toxicity assessments.
  • These studies generate pharmacokinetic data on the rate, extent, and duration of exposure.
  • While typically integrated into toxicity studies, ancillary toxicokinetic studies (prospective, retrospective) are sometimes necessary.

Purpose of the Study:

  • To assess systemic exposure in nonclinical toxicity studies by generating pharmacokinetic data.
  • To explore the utility and challenges of ancillary toxicokinetic studies, including retrospective approaches.
  • To provide examples and data interpretation for supporting toxicity study decision-making.

Main Methods:

  • Integration of toxicokinetic assessments within standard toxicity studies.
  • Performance of prospective, retrospective, and other ancillary toxicokinetic studies.
  • Analysis of pharmacokinetic data to determine rate, extent, and duration of exposure.

Main Results:

  • Ancillary studies, particularly retrospective ones, are valuable when initial toxicity studies lack sufficient pharmacokinetic data or show unexpected results.
  • Examples from pharmaceutical research highlight the challenges and utility of alternative toxicokinetic study designs.
  • These studies successfully established systemic exposure, enabled human exposure comparisons, elucidated toxicities, and explained lack of toxicity.

Conclusions:

  • Ancillary toxicokinetic studies are critical for robust nonclinical safety assessments.
  • Retrospective and other alternative approaches can provide essential data to support toxicity study interpretations and regulatory decisions.
  • Effective use of toxicokinetic data aids in understanding compound behavior and potential risks.

Related Experiment Videos