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An assessment of the genotoxicity of vanadium
J Owusu-Yaw1, M D Cohen, S Y Fernando
1Food Science and Human Nutrition Department, University of Florida, Gainesville 32611.
Abstract:
The activities of vanadium oxide (V2O3), vanadyl sulfate (VOSO4) and ammonium metavanadate (NH4VO3) in inducing sister chromatid exchange (SCE) and chromosomal aberrations (CAb) were assayed in Chinese hamster ovary cells. The toxic concentrations (TC50) for these compounds were found to be 25, 23 and 16 micrograms elemental vanadium/ml, respectively. At does 1/50-1/4 TC50, vanadium compounds were able to induce significant increases (P less than 0.01) in the SCE frequency with or without the addition of rat hepatic S9 mix. These compounds also induced CAb in the cells at doses closely equivalent to the TC50.
Insights
Vanadium compounds like vanadium oxide induced genetic damage in Chinese hamster ovary cells. These chemicals increased sister chromatid exchange and chromosomal aberrations, indicating genotoxicity.
Area of Science:
- Toxicology and Genotoxicity
- Environmental Health
- Biochemistry
Background:
- Vanadium compounds are utilized in various industrial applications.
- Understanding the genotoxic potential of vanadium compounds is crucial for risk assessment.
- Previous studies have suggested potential cellular effects of vanadium.
Purpose of the Study:
- To evaluate the genotoxic effects of specific vanadium compounds: vanadium oxide (V2O3), vanadyl sulfate (VOSO4), and ammonium metavanadate (NH4VO3).
- To assess the induction of sister chromatid exchange (SCE) and chromosomal aberrations (CAb) in mammalian cells.
- To determine the toxic concentrations (TC50) of these vanadium compounds.
Main Methods:
- Chinese hamster ovary (CHO) cells were exposed to varying concentrations of V2O3, VOSO4, and NH4VO3.
- Sister chromatid exchange (SCE) frequency was analyzed, with and without the addition of rat hepatic S9 mix.
- Chromosomal aberrations (CAb) were quantified at doses near the toxic concentrations (TC50).
Main Results:
- The toxic concentrations (TC50) were determined as 25, 23, and 16 µg elemental vanadium/ml for V2O3, VOSO4, and NH4VO3, respectively.
- All tested vanadium compounds significantly increased SCE frequency at sub-toxic doses (1/50-1/4 TC50).
- Chromosomal aberrations were induced by these compounds at doses close to their respective TC50 values.
Conclusions:
- Vanadium compounds V2O3, VOSO4, and NH4VO3 exhibit significant genotoxic activity.
- These compounds are capable of inducing both sister chromatid exchange and chromosomal aberrations in vitro.
- The findings highlight the need for careful handling and risk assessment of vanadium compounds in occupational and environmental settings.