Exposure to the dioxin 2,3,7,8-tetrachloro-dibenzo-p-dioxin (TCDD) induces squamous metaplasia in the endocervix of cynomolgus macaques

M. A. Scott, R. P. Tarara, Andrew G Hendrickx, K. Benirschke, J. W. Overstreet, B. L. Lasley

Research output: Contribution to journalArticle

4 Scopus citations

Abstract

Female cynomolgus macaques (n = 11) were treated orally with graded doses of 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD). Cervical tissue was recovered at necropsy 1.2-2.7 years later and examined using routine histopathology. Results were compared histologically with cervical tissue from untreated, age- and parity-matched controls. Significant squamous epithelial metaplasia was observed in the endocervix of 9 of 11 TCDD-treated animals, and the degree of severity was dose dependent. In contrast, minimal or no pathological changes were observed in eight of nine control animals and one animal had only mild squamous metaplasia. These results suggest that TCDD exposure induces epithelial transdifferentiation in the primate cervix. Consequently, the TCDD-treated macaque may serve as a predictable animal model for the study of cervical epithelial transdifferentiation and for examining the relationship between squamous metaplasia and cervical oncogenesis both at the cellular and at the molecular level.

Original languageEnglish (US)
Pages (from-to)156-160
Number of pages5
JournalJournal of Medical Primatology
Volume30
Issue number3
DOIs
StatePublished - 2001

Keywords

  • Animal model
  • Cervix
  • Histopathology
  • Primate
  • Reproductive pathology
  • Toxicology

ASJC Scopus subject areas

  • Animal Science and Zoology
  • veterinary(all)

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