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Related Concept Videos

Toxicity Testing in Animals01:23

Toxicity Testing in Animals

Toxicity tests in animals are grounded on two main assumptions: first, the effects observed in laboratory animals can be extrapolated to humans, especially when adjusted for body surface area; second, high-dose exposure in animals is essential to identify potential human hazards from lower doses. This is based on the quantal dose-response concept, which faces the challenge of extrapolating results from relatively few test animals to much larger human populations. For example, a 0.01% incidence...

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Differences in Ototoxicity across Species.

Brian W Blakley1, Jordan Hochman, Mark Wellman

  • 1Department of Otolaryngology, University of Manitoba, Winnipeg, Manitoba.

Journal of Otolaryngology - Head & Neck Surgery = Le Journal D'Oto-Rhino-Laryngologie Et De Chirurgie Cervico-Faciale
|January 9, 2009
PubMed
Summary
This summary is machine-generated.

Rodents show varied responses to ototoxic drugs. Cisplatin (cisplatin) ototoxicity in guinea pigs mirrors human reactions, while C57 mice exhibit resistance to gentamicin (gentamicin)-induced hearing loss, highlighting the need for careful animal model selection in research.

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Area of Science:

  • Oto- and nephrotoxicity research
  • Comparative pharmacology
  • Translational ototoxicity studies

Background:

  • Ototoxic drugs like cisplatin and gentamicin pose risks to hearing.
  • Understanding interspecies differences in drug response is crucial for preclinical research.
  • Rodent models are frequently used to study drug-induced ototoxicity.

Purpose of the Study:

  • To compare the dose-effect relationships of cisplatin and gentamicin in rodents versus humans.
  • To identify potential discrepancies in ototoxicity between human and animal models.
  • To inform the selection of appropriate animal models for ototoxicity research.

Main Methods:

  • Controlled animal study involving guinea pigs and C57 mice.
  • Administration of typical research regimens for cisplatin and gentamicin.
  • Auditory brainstem response testing and comparison with human clinical data.

Main Results:

  • Cisplatin induced dose-dependent hearing loss in guinea pigs, comparable to human responses.
  • Higher cisplatin doses led to increased mortality from renal insufficiency.
  • Gentamicin caused less hearing loss in mice than expected, despite high doses, indicating resistance.

Conclusions:

  • Guinea pig models show similar cisplatin ototoxicity to humans.
  • C57 mice demonstrate significant resistance to gentamicin-induced hearing loss compared to humans.
  • Careful consideration of animal models is essential for accurate translational ototoxicity research.