Autoantigens in systemic autoimmunity: critical partner in pathogenesis.

Area of Science:

• Rheumatology
• Immunology
• Pathogenesis

Background:

• Understanding autoimmune rheumatic diseases is complex, involving genetics, environment, and kinetics.
• Immune responses in these diseases are specific, with distinct autoantibodies linked to different disease phenotypes.

Purpose of the Study:

• To explore the paradigm of antigen selection in autoimmunity.
• To understand the partnership between target tissue and immune effector pathways in disease pathogenesis.

Main Methods:

• Review of accumulating data on antigen selection in autoimmunity.
• Conceptual model integrating target tissue, immune effectors, and homeostatic pathways.

Main Results:

• Autoantibody patterns result from interacting systems: target tissue, immune effectors, and homeostatic pathways.
• Specific conditions within diseased tissue lead to the expression of 'neo-antigens'.

Conclusions:

• Autoantigen selection is a dynamic process involving a mutually reinforcing partnership.
• Studying diseased target tissue in vivo is crucial for identifying amplifying loops in autoimmunity.