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Vanadate and cardiovascular system

M Carmignani1, A R Volpe, P Boscolo

  • 1Dept. of Basic and Applied Biology, University of L'Aquila, Coppito (AQ), Italy.

Giornale Italiano Di Medicina Del Lavoro
|January 1, 1995
PubMed
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Chronic vanadium exposure in rats caused arterial hypertension by affecting neurogenic and hormonal pathways. Rabbits showed some effects but not hypertension, indicating species-specific responses to vanadium toxicity.

Area of Science:

  • Toxicology
  • Cardiovascular Physiology
  • Environmental Health

Background:

  • Vanadium compounds are environmental contaminants with potential health effects.
  • Understanding vanadium's impact on cardiovascular function is crucial for risk assessment.

Purpose of the Study:

  • To investigate the effects of chronic vanadium exposure on blood pressure and cardiovascular parameters in rats and rabbits.
  • To elucidate the underlying mechanisms of vanadium-induced cardiovascular changes.

Main Methods:

  • Rats received 1-100 ppm vanadium in drinking water for 7 months; rabbits received 1 ppm for 12 months.
  • Evaluated effects on neurogenic pathways, catecholaminergic mechanisms, and autacoidal systems.
  • Measured tissue vanadium accumulation (vanadyl), nitric oxide synthesis, and cardiac/vascular function.

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Main Results:

  • Rats developed arterial hypertension due to complex neurogenic and hormonal dysregulation.
  • Rabbits showed increased vascular resistance but not hypertension, due to reduced cardiac output and inotropism.
  • Vanadium accumulated in bone, kidney, aorta, heart, and brain.
  • Evidence suggested vanadium reduced nitric oxide synthesis in rabbits.

Conclusions:

  • Chronic vanadium exposure can induce arterial hypertension through species-specific mechanisms.
  • Vanadium's cardiovascular effects involve complex interactions with neuroendocrine and vascular systems.
  • Vanadium toxicity is influenced by dose, duration, and species, impacting nitric oxide pathways.