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Related Experiment Videos

Do infectious agents cause rheumatoid arthritis?

R L Wilder1, L J Crofford

  • 1Arthritis and Rheumatism Branch, National Institute of Arthritis and Musculoskeletal and Skin Diseases, National Institutes of Health, Bethesda, MD 20892.

Clinical Orthopaedics and Related Research
|April 1, 1991
PubMed
Summary
This summary is machine-generated.

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Evidence suggests bacteria, not just viruses, may cause rheumatoid arthritis (RA). Bacterial products and immune responses mimic RA, indicating a potential infectious link to this autoimmune disease.

Area of Science:

  • Immunology
  • Microbiology
  • Rheumatology

Background:

  • Rheumatoid arthritis (RA) has long been suspected to have an infectious origin, but definitive proof remains elusive.
  • Viruses like Epstein-Barr virus and parvoviruses have been considered potential culprits.
  • Emerging data increasingly points towards a bacterial etiology for RA.

Purpose of the Study:

  • To explore the evidence implicating bacteria in the pathogenesis of rheumatoid arthritis.
  • To investigate the immunological links between bacterial components and RA-like conditions.

Main Methods:

  • Review of existing literature on infectious agents and arthritis.
  • Examination of animal models of RA induced by bacterial products.
  • Analysis of immunological cross-reactivity between bacterial antigens and host components relevant to RA.

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Main Results:

  • Lyme arthritis, caused by bacteria, can clinically resemble RA.
  • Bacterial products are definitively linked to various inflammatory reactive arthropathies.
  • Bacterial cell-wall fragments (peptidoglycans) can induce RA-like diseases in rats.
  • Immunological connections, including heat shock proteins and rheumatoid factors, exist between bacterial peptidoglycans and RA.

Conclusions:

  • The hypothesis that bacteria play a significant role in RA is supported by substantial evidence.
  • These findings suggest a broadening understanding of autoimmune diseases, with increasing overlap with infectious processes.
  • Current concepts of infection and autoimmunity are evolving to encompass shared mechanisms.