The intersection of COVID-19 and autoimmunity

Area of Science:

• Immunology
• Virology
• Autoimmune Diseases

Background:

• COVID-19 presents with diverse clinical outcomes, from mild to fatal.
• Inappropriate immune responses are implicated in severe COVID-19 pathogenesis.
• The interplay between viral infections and autoimmunity is a growing area of research.

Purpose of the Study:

• To investigate if pre-existing autoimmunity increases COVID-19 severity.
• To determine if SARS-CoV-2 infection can trigger new-onset autoimmunity.
• To explore the mechanisms linking viral infection and autoimmune responses.

Main Methods:

• Review of current research on COVID-19 and autoimmunity.
• Analysis of autoantibody prevalence in critical COVID-19 patients.
• Examination of B cell responses in SARS-CoV-2 infection.

Main Results:

• 10-15% of critical COVID-19 patients have autoantibodies against type I interferons.
• Functional autoantibodies (e.g., pro-thrombotic, anti-cytokine) identified post-SARS-CoV-2 infection.
• Extrafollicular B cell responses may contribute to autoantibody generation.

Conclusions:

• Pre-existing autoimmunity may predispose individuals to severe COVID-19.
• SARS-CoV-2 infection can potentially trigger de novo autoimmunity.
• Understanding these mechanisms is crucial for managing COVID-19 and its sequelae.