Autoantibodies in Common Connective Tissue Diseases: A Primer for Laboratory Professionals

Area of Science:

• Clinical immunology
• Autoantibody testing
• Connective tissue diseases

Background:

• Autoimmune connective tissue disorders (ACTDs) are prevalent globally, affecting 3-5% of the population.
• Autoantibodies are vital for ACTD diagnosis, risk stratification, prognostication, and management.
• Many autoantibodies remain in the research phase, posing challenges for clinical application.

Purpose of the Study:

• To discuss common connective tissue disorders and their associated autoantibodies.
• To describe current clinical laboratory methods for autoantibody testing.
• To outline the advantages and limitations of various autoantibody testing methodologies.

Main Methods:

• Review of common connective tissue disorders and their associated autoantibodies.
• Description of current autoantibody testing methodologies used in clinical laboratories.
• Analysis of the advantages and limitations of each testing method.

Main Results:

• Discussion of well-characterized autoantibodies and their role in ACTD diagnosis.
• Overview of diverse autoantibody testing techniques, including their strengths and weaknesses.
• Identification of challenges in the transition of research-stage autoantibodies to clinical practice.

Conclusions:

• Understanding autoantibody roles and testing methodologies is essential for laboratory professionals.
• Collaboration between laboratory professionals and clinicians is key for appropriate clinical utilization of autoantibody tests.
• Harmonization and clear guidelines are needed for the growing number of commercially available autoantibody tests.