Amplification of autoimmune disease by infection

Area of Science:

• Immunology and Microbiology
• Autoimmune Disease Pathogenesis
• Infectious Disease Mechanisms

Background:

• Chronic persistent microbes (herpesviruses, Chlamydiae) are implicated in human autoimmune diseases.
• These microbes may reactivate during immunodeficiency, targeting sites of autoimmune inflammation.
• Existing evidence suggests a link between microbial infections and autoimmune disease exacerbation.

Purpose of the Study:

• To investigate the role of microbial reactivation in amplifying autoimmune inflammatory disease.
• To explore the potential benefits of preventive antiviral therapy in immunocompromised patients with autoimmune disorders.

Main Methods:

• Utilized experimental animal models involving mice with induced transient autoimmune diseases.
• Infected mice with specific herpesvirus or Chlamydia species to observe disease progression.
• Analyzed the impact of microbial infection on disease severity, relapse, and tissue destruction, particularly under immunosuppression.

Main Results:

• Microbial infection significantly increased the severity and induced relapse in experimental autoimmune diseases.
• Evidence indicates specific import of microbes to inflammatory sites, exacerbating tissue destruction.
• The detrimental effects were more pronounced in immunosuppressed hosts.

Conclusions:

• Microbial infection, particularly reactivation of persistent organisms, can amplify autoimmune inflammatory disease.
• This microbial-driven amplification may be a general mechanism applicable to various human autoimmune conditions.
• Preventive antiviral therapy is recommended for autoimmune patients undergoing immunosuppressive treatment.