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[Toxicity of hexachlorobenzene in Meriones unguiculatus: effects on thyroid and liver]

Lotfi Bitri1, Nedra Dhaouadi, Latifa Ouertani

  • 1Laboratoire de physiologie animale, département des sciences biologiques, UR Physiologie environnementale et biorythmes, faculté des sciences de Tunis, Tunisie. bitrilotfi@yahoo.fr

Comptes Rendus Biologies
|May 29, 2007
PubMed

Insights

Hexachlorobenzene (HCB) exposure in Meriones unguiculatus caused significant liver damage, including hypertrophy and cellular alterations. HCB also altered liver enzymes and sex-specific thyroid hormone levels, indicating toxic effects.

Area of Science:

  • Toxicology
  • Environmental Health
  • Animal Physiology

Context:

  • Hexachlorobenzene (HCB) is a persistent organic pollutant with known toxic effects.
  • Understanding HCB's impact on mammalian liver and thyroid function is crucial for risk assessment.
  • Meriones unguiculatus (jirds) serve as a model organism for studying xenobiotic toxicity.

Purpose:

  • To investigate the in vivo effects of HCB administration on the liver and thyroid of Meriones unguiculatus.
  • To assess dose-dependent toxicological changes in hepatic and thyroid parameters.
  • To evaluate potential sex-specific differences in HCB toxicity.

Summary:

  • Oral administration of HCB (1.6, 4, 16 mg/kg) for 30 days induced hepatic hypertrophy and cytomorphological alterations (necrosis, congestion, vacuolization) in a dose-dependent manner.
  • HCB significantly altered hepatic transaminase activities (ALAT, ASAT) with sex-specific patterns.
  • Thyroid hormone levels (TT3, TT4) were significantly affected by HCB, showing distinct sex-dependent decreases.

Impact:

  • This study highlights the hepatotoxic and thyroid-disrupting potential of HCB in a mammalian model.
  • Findings contribute to understanding the mechanisms of HCB toxicity and inform environmental health policies.
  • The sex-dependent effects underscore the need for considering gender in toxicological risk assessments.

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