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Decavanadate effects in biological systems.

Manuel Aureliano1, Ricardo M C Gândara

  • 1CBME, Dept. Química e Bioquímica, FCT, Universidade do Algarve, 8005-139 Faro, Portugal. maalves@ualg.pt

Journal of Inorganic Biochemistry
|April 19, 2005
PubMed
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Decavanadate, a specific vanadium form, uniquely impacts biological systems by inducing oxidative stress and altering vanadium accumulation, particularly in mitochondria. These findings highlight decavanadate

Area of Science:

  • Biochemistry
  • Toxicology
  • Cell Biology

Background:

  • Vanadium biological studies have overlooked decameric vanadate species.
  • Decavanadate interacts with proteins and inhibits energy transduction systems.
  • Previous in vivo studies rarely considered decavanadate's contribution to vanadium's effects.

Purpose of the Study:

  • To investigate the distinct biological effects of decavanadate compared to other vanadate oligomers in vivo.
  • To analyze the impact of decavanadate on oxidative stress markers and vanadium accumulation in hepatic and cardiac tissues.

Main Methods:

  • Acute in vivo exposure of animal models to sub-lethal concentrations of "metavanadate" and "decavanadate".
  • Monitoring of oxidative stress markers: catalase activity, glutathione content, lipid peroxidation, and mitochondrial superoxide anion production.

Related Experiment Videos

  • Analysis of vanadium intracellular accumulation, particularly in mitochondria.

    • Main Results:

    • Decavanadate exposure uniquely altered catalase activity, glutathione levels, lipid peroxidation, and mitochondrial superoxide anion production.
    • Decavanadate significantly increased vanadium accumulation in mitochondria compared to other vanadate forms.
    • Both "metavanadate" and "decavanadate" equally reduced reactive oxygen species (ROS) production and total intracellular reducing power.

    Conclusions:

    • Decameric vanadate species play a significant role in the in vivo and in vitro biological effects of vanadium.
    • Decavanadate induces specific oxidative stress responses and influences vanadium's intracellular distribution.
    • Mitochondrial accumulation of vanadium is particularly pronounced following decavanadate administration.