Herpesviruses and autoimmunity

Area of Science:

• Immunology
• Virology
• Rheumatology

Background:

• Herpesvirus infections, particularly Epstein-Barr virus (EBV), are associated with autoimmune diseases like systemic lupus erythematosus (SLE), multiple sclerosis (MS), and rheumatoid arthritis (RA).
• Herpesviruses may initiate autoimmune processes and worsen disease progression.
• EBV is hypothesized to trigger anti-nucleoprotein antibodies in SLE via molecular mimicry and shows productive infection in MS brain lesions and RA synovium.

Purpose of the Study:

• To review the role of herpesviruses, especially EBV, in the pathogenesis of major autoimmune diseases.
• To discuss novel mechanisms, including bystander effects and innate immune amplification by EBV.
• To examine preclinical, epidemiological, and clinical evidence regarding antiviral therapy for herpesvirus-associated autoimmune conditions.

Main Methods:

• Review of existing literature, including preclinical studies in mouse gamma-herpesvirus models.
• Analysis of epidemiological data on herpesvirus prevalence in SLE, MS, and RA patients.
• Examination of clinical studies investigating antiviral treatments for these conditions.

Main Results:

• Evidence suggests EBV's role in initiating SLE via molecular mimicry.
• Productive EBV infection is observed in affected tissues of MS and RA patients.
• EBV may contribute to autoimmune pathology through innate immune amplification.

Conclusions:

• Herpesviruses, particularly EBV, play a significant role in the development and progression of autoimmune diseases.
• Understanding EBV's mechanisms, such as molecular mimicry and immune amplification, is crucial.
• Antiviral therapies show potential clinical benefit for managing herpesvirus-associated autoimmune diseases.