Overview on the Link Between the Complement System and Auto-Immune Articular and Pulmonary Disease

Area of Science:

• Immunology
• Rheumatology
• Pulmonology

Background:

• Complement system (CS) dysregulation is implicated in autoimmune disease pathogenesis.
• Rheumatoid arthritis (RA) involves synovitis and extra-articular manifestations, with activated CS contributing to tissue damage and disease initiation.
• Interstitial lung disease (ILD), a common RA manifestation, can lead to fibrosis.

Purpose of the Study:

• To review evidence of CS dysregulation in RA and ILD.
• To highlight the role of CS in innate and adaptive immunity in disease development, using idiopathic pulmonary fibrosis as a model.
• To explore potential therapeutic targeting of the CS in RA and ILD.

Main Methods:

• Literature review focusing on CS activation in RA and ILD.
• Analysis of the role of CS in immune responses.
• Examination of existing RA and ILD treatments for indirect effects on CS.

Main Results:

• CS is activated in RA and contributes to pathogenesis and tissue damage.
• CS plays a role in both innate and adaptive immune responses in RA and ILD.
• Current treatments for RA and ILD may indirectly modulate CS activity.

Conclusions:

• CS dysregulation is a significant factor in RA and ILD.
• The CS is a potential therapeutic target for managing RA and associated ILD.
• Further research into CS-targeted therapies could benefit patients with these complex diseases.