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Related Experiment Videos

Polymyositis-dermatomyositis and infections.

Sandra Zampieri1, Anna Ghirardello, Luca Iaccarino

  • 1University of Padova, Division of Rheumatology, Department of Clinical and Experimental Medicine, Italy.

Autoimmunity
|June 14, 2006
PubMed
Summary

Infectious agents may trigger autoimmune diseases like polymyositis (PM) and dermatomyositis (DM) in susceptible individuals. These infections also increase complication risks in patients with these inflammatory conditions.

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Area of Science:

  • Autoimmunity and Infectious Diseases
  • Immunology and Rheumatology

Background:

  • Genetically predisposed individuals may develop autoimmunity triggered or exacerbated by infectious agents.
  • Direct evidence linking pathogens to autoimmune disease induction is emerging, supported by animal models and human studies.
  • Polymyositis (PM) and dermatomyositis (DM) are inflammatory myopathies where infectious triggers are hypothesized.

Purpose of the Study:

  • To review the potential role of infectious agents in triggering polymyositis (PM) and dermatomyositis (DM).
  • To summarize epidemiological, clinical, and experimental evidence supporting infection-induced PM and DM.
  • To discuss the increased risk of infections in PM and DM patients due to immune abnormalities and treatments.

Main Methods:

  • Literature review of epidemiological studies.

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  • Analysis of clinical findings.
  • Examination of experimental data from animal models and human studies.

    • Main Results:

    • Evidence suggests infectious agents may contribute to the induction and exacerbation of autoimmune diseases like PM and DM.
    • Immune system dysregulation and immunosuppressive therapies in PM and DM patients heighten susceptibility to infections.
    • Published data indicate an elevated risk of infectious complications in individuals with PM and DM.

    Conclusions:

    • Infectious agents are plausible triggers for autoimmune responses in polymyositis and dermatomyositis.
    • Understanding the role of infections is crucial for managing autoimmune diseases and their complications.
    • Further research is warranted to elucidate the precise mechanisms linking pathogens to autoimmunity in PM and DM.