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Study on the common teratogenic pathway elicited by the fungicides triazole-derivatives

E Menegola1, M L Broccia, F Di Renzo

  • 1Department of Biology, University of Milan, via Celoria 26, 20133 Milan, Italy. elena.menegola@unimi.it

Toxicology in Vitro : an International Journal Published in Association with BIBRA
|May 26, 2005
PubMed

Insights

Triazole derivatives like Flusilazole, Triadimefon, and Triadimenol disrupt rodent embryo development. These compounds interfere with hindbrain segmentation and neural crest cell migration, indicating a shared teratogenic pathway.

Area of Science:

  • Developmental toxicology
  • Teratology
  • Molecular embryology

Background:

  • Triazole derivatives are widely used fungicides.
  • Previous studies indicated Fluconazole alters embryonic development, specifically hindbrain segmentation and neural crest cell (NCC) migration.
  • The teratogenic potential of other triazole derivatives on embryonic development remains largely unexplored.

Purpose of the Study:

  • To investigate if other teratogenic triazole derivatives share a common pathogenic pathway affecting embryonic development.
  • To evaluate the effects of Flusilazole, Triadimefon, and Triadimenol on hindbrain segmentation, NCC migration, and pharyngeal development in rat embryos cultured in vitro.

Main Methods:

  • Rat embryos (9.5 days post coitum) were exposed in vitro to teratogenic concentrations of Flusilazole, Triadimefon, and Triadimenol.
  • Embryos were cultured for 24, 48, or 60 hours.
  • Hox-b1 and Krox-20 protein expression (hindbrain segmentation markers), NCC localization, embryonic morphology, and branchial nerve structures were analyzed.

Main Results:

  • Exposure to Flusilazole, Triadimefon, and Triadimenol resulted in altered hindbrain segmentation.
  • Abnormalities in neural crest cell migration were observed.
  • Pharyngeal arch and cranial nerve development were significantly affected, leading to morphological abnormalities.

Conclusions:

  • Flusilazole, Triadimefon, and Triadimenol exhibit a common, severe teratogenic property.
  • These triazole derivatives act by disrupting the normal hindbrain developmental pattern.
  • The findings suggest a shared molecular mechanism underlying the teratogenicity of this class of compounds.

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