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Related Experiment Videos

Acrolein initiates rat urinary bladder carcinogenesis.

S M Cohen1, E M Garland, M St John

  • 1Department of Pathology and Microbiology, University of Nebraska Medical Center, Omaha 68198-3135.

Cancer Research
|July 1, 1992
PubMed
Summary

Acrolein initiates urinary bladder tumors in rats, but its promoting and complete carcinogenic activities could not be fully evaluated due to toxicity. This study highlights acrolein

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Area of Science:

  • Toxicology
  • Carcinogenesis
  • Environmental Health

Background:

  • Acrolein is an environmental aldehyde known for DNA adduct formation, mutagenicity, and teratogenicity.
  • Despite lacking evidence of carcinogenicity in rodent bioassays, acrolein's presence in cigarette smoke and role as a toxic metabolite warrants urinary bladder cancer investigation.
  • Previous studies have not definitively established acrolein's carcinogenic potential in the urinary tract.

Purpose of the Study:

  • To investigate the carcinogenic activity of acrolein specifically in the rat urinary bladder.
  • To determine if acrolein possesses initiating and/or promoting activity in rat urinary bladder carcinogenesis.
  • To assess the complete carcinogenic activity of acrolein in the rat urinary bladder.

Main Methods:

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  • Initiating activity was assessed by administering acrolein (2 mg/kg i.p. twice weekly for 6 weeks) followed by uracil.
  • A positive control group received N-[4-(5-Nitro-2-furyl)-2-thiazolyl]formamide (FANFT) followed by uracil.
  • Promoting and complete carcinogenic activity were evaluated by feeding FANFT followed by acrolein, with toxicity monitoring.

    • Main Results:

    • Acrolein followed by uracil resulted in a 60% incidence of papilloma, significantly higher than the 27% in the solvent control group.
    • FANFT demonstrated potent initiating activity, inducing 70% carcinomas and 30% papillomas.
    • Acrolein administration led to severe toxicity, necessitating early termination and precluding a full evaluation of promoting or complete carcinogenic effects.

    Conclusions:

    • Acrolein exhibits initiating activity for rat urinary bladder tumors.
    • Severe toxicity observed with acrolein administration prevented a comprehensive assessment of its promoting and complete carcinogenic potential.
    • Further research may be needed to clarify acrolein's role in urinary bladder carcinogenesis under less toxic exposure conditions.