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Related Experiment Videos

Mercury-induced autoimmunity in mice.

Jesper Bo Nielsen1, Per Hultman

  • 1Environmental Medicine, University of Southern Denmark, Winslowparken 17, DK-5000 Odense C, Denmark. jbnielsen@health.sdu.dk

Environmental Health Perspectives
|November 12, 2002
PubMed
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Mercury exposure can trigger autoimmunity by modifying fibrillarin, leading to an immune response. Genetics, gender, and mercury levels influence this mercury-induced autoimmunity in mice.

Area of Science:

  • Immunology
  • Toxicology
  • Genetics

Background:

  • Mercury exposure is linked to autoimmune diseases.
  • The precise mechanisms of mercury-induced autoimmunity are not fully understood.
  • Genetic and environmental factors likely play a role in susceptibility.

Purpose of the Study:

  • To investigate the role of gender, genetics, and toxicokinetics in mercury-induced autoimmunity.
  • To elucidate the mechanism of mercury's effect on the autoantigen fibrillarin.
  • To determine the influence of H-2 haplotype and other genetic factors on autoimmune response.

Main Methods:

  • Mice with different H-2 haplotypes were exposed to mercury chloride (HgCl2).
  • Whole-body and renal mercury accumulation were measured.

Related Experiment Videos

  • Serum antinuclear antibodies (AFA) and immunoglobulin E (IgE) were analyzed to assess autoimmune response and T-helper cell activity.

    • Main Results:

    • A susceptible H-2 haplotype is a prerequisite for developing autoantibodies to fibrillarin (AFA).
    • Genetic factors outside the H-2 region and gender modulate the induction and development of AFA.
    • Mercury exposure influences the autoimmune response in a dose-dependent manner, with different thresholds in males and females.

    Conclusions:

    • Mercury-induced autoimmunity involves modification of fibrillarin and a T-cell-dependent immune response.
    • Susceptibility to mercury-induced autoimmunity is strongly influenced by H-2 haplotype, gender, and other genetic factors.
    • While mercury exposure modulates the autoimmune response, IgE induction is not mechanistically linked to AFA response.