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Mutagenicity of a series of hexacoordinate chromium (III) compounds

G Warren, P Schultz, D Bancroft

    Mutation Research
    |October 1, 1981
    PubMed

    Insights

    This study investigated chromium(III) compounds for DNA damage and mutagenicity. Certain chromium compounds with specific aromatic amine ligands show significant genetic toxicity, potentially contributing to chromium carcinogenesis.

    Area of Science:

    • Environmental Science
    • Toxicology
    • Genetics

    Background:

    • Chromium compounds are known environmental contaminants.
    • The genotoxicity of chromium(III) requires further elucidation.
    • Understanding chromium's mutagenic mechanisms is crucial for risk assessment.

    Purpose of the Study:

    • To assess the DNA-damaging and mutagenic potential of 17 chromium(III) compounds.
    • To identify structural features of chromium compounds associated with genotoxicity.
    • To explore the role of chromium(III) in mutagenesis and carcinogenesis.

    Main Methods:

    • Utilized the E. coli differential repair assay to evaluate DNA-damaging capabilities.
    • Employed Salmonella typhimurium strains to test for mutagenicity.
    • Synthesized and characterized chromium(III) complexes with varying amine ligands.

    Main Results:

    • Four chromium(III) compounds demonstrated activity in both DNA repair and mutagenicity assays.
    • Four additional compounds were positive only in the DNA repair assay.
    • Compounds with aromatic amine ligands (e.g., 2,2'-bipyridine, 1,10-phenanthroline) showed higher activity compared to those with saturated amine ligands.

    Conclusions:

    • Chromium(III) can exhibit significant genotoxicity when complexed with appropriate ligands.
    • The ligand environment is critical for the genetic toxicity of chromium(III) compounds.
    • These findings suggest a potential mechanism for chromium-induced mutagenesis and carcinogenesis.

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