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Cell proliferation and forestomach carcinogenesis

N Ito1, M Hirose, S Takahashi

  • 1First Department of Pathology, Nagoya City University Medical School, Japan.

Environmental Health Perspectives
|December 1, 1993
PubMed
Summary

Phenolic compounds like BHA increase cell proliferation and oncogene expression in rat forestomachs, potentially leading to carcinogenesis. While some lesions regress after chemical cessation, others persist, indicating long-term risks.

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Area of Science:

  • Toxicology
  • Carcinogenesis
  • Molecular Biology

Background:

  • Phenolic compounds are widely used as antioxidants.
  • Their role in forestomach carcinogenesis requires further investigation.
  • Cell proliferation is a key factor in cancer development.

Purpose of the Study:

  • To analyze cell proliferation's role in phenolic compound-induced rat forestomach carcinogenesis.
  • To examine early histopathological changes, oncogene expression, and lesion reversibility.

Main Methods:

  • F344 male rats were treated with butylated hydroxyanisole (BHA), caffeic acid, sesamol, or 4-methoxyphenol.
  • Histopathological examination, DNA synthesis, and oncogene (c-fos, c-myc) expression were analyzed.
  • Reversibility of lesions was assessed after cessation of chemical treatment.

Main Results:

  • Increased DNA synthesis and cell proliferation were observed within 12 hours to 3 days.
  • Elevated c-fos and c-myc oncogene expression occurred 15 minutes after BHA treatment.
  • Most lesions regressed after chemical cessation, but some dysplastic lesions persisted at 48 weeks.

Conclusions:

  • Phenolic compounds act as mitogens in rat forestomach epithelium.
  • Toxicity-induced regeneration further enhances cell proliferation.
  • Some induced lesions show persistent dysplasia, suggesting a carcinogenic potential.

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