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Related Experiment Videos

Struvite urolithiasis in a B6C3F1 mouse.

Z W Wojcinski1, R C Renlund, N J Barsoum

  • 1Parke-Davis Research Institute, Mississauga, Ontario, Canada.

Laboratory Animals
|October 1, 1992
PubMed
Summary
This summary is machine-generated.

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A male mouse in a 2-year carcinogenicity study developed bladder stones (struvite). This finding highlights the importance of considering spontaneous rodent bladder conditions in toxicology research.

Area of Science:

  • Toxicology
  • Veterinary Pathology
  • Rodent Models

Background:

  • Carcinogenicity bioassays are crucial for evaluating chemical safety.
  • B6C3F1 mice are commonly used in long-term toxicology studies.
  • Spontaneous conditions in rodents can impact study outcomes.

Observation:

  • One male B6C3F1 mouse exhibited clinical signs including skin sores, penile prolapse, and urine scalding near study termination.
  • Necropsy revealed a distended urinary bladder filled with crystallized particles.
  • Microscopic examination showed subacute cystitis with significant transitional epithelial hyperplasia.

Findings:

  • X-ray diffraction analysis identified the crystallized particles as struvite (ammonium magnesium phosphate).
  • The case represents a spontaneous occurrence of bladder stones in a rodent model.

Related Experiment Videos

  • This finding is associated with significant urinary bladder pathology.

    • Implications:

    • The spontaneous formation of bladder stones in rodents can complicate the interpretation of toxicology study results.
    • Understanding the incidence and mechanisms of such spontaneous conditions is vital for accurate risk assessment.
    • This case underscores the need for careful monitoring and reporting of incidental findings in long-term rodent studies.