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Environmental Xenobiotic Exposure and Autoimmunity.

K Michael Pollard1, Joseph M Christy1, David M Cauvi2

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Environmental factors like xenobiotics can trigger autoimmune diseases in genetically susceptible individuals. Exposure causes inflammation and tissue damage, promoting the development of autoreactive cells and autoimmunity.

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Area of Science:

  • Immunology
  • Environmental Health
  • Toxicology

Background:

  • Autoimmune disease susceptibility involves genetics, environment, and chance.
  • Identifying triggers for autoimmune diseases remains a challenge.
  • Extrinsic factors like drugs and chemicals can induce autoimmunity, especially systemic lupus.

Purpose of the Study:

  • To review xenobiotics as environmental factors linked to human autoimmunity.
  • To discuss mechanisms of xenobiotic-induced autoimmune disease.
  • To highlight the role of inflammation and innate immunity.

Main Methods:

  • Review of human and animal model studies on xenobiotic exposure.
  • Analysis of epidemiological links between xenobiotics and autoimmunity.
  • Focus on inflammatory and innate immune responses.

Main Results:

  • Xenobiotic exposure can cause localized tissue damage and chronic inflammation.
  • This leads to the release of self-antigens and damage-associated molecular patterns.
  • Ectopic lymphoid structures and lymphoid hypertrophy promote autoreactive B and T cell production.

Conclusions:

  • Xenobiotics are a significant environmental factor in autoimmune disease development.
  • Inflammation and innate immune responses are key mechanisms in xenobiotic-induced autoimmunity.
  • These processes contribute to the development and persistence of autoimmunity in susceptible individuals.