Technical aspects of HLA antibody testing.

Area of Science:

• Nephrology
• Immunology
• Transplantation

Background:

• Pretransplant identification of donor-specific antibodies (DSAs) is crucial for renal allograft transplantation success.
• DSAs can be an acceptable risk or a contraindication, influencing transplantation decisions.
• Posttransplant DSAs are linked to rejection and graft loss, necessitating monitoring.

Purpose of the Study:

• To review the strengths and weaknesses of solid-phase antibody detection assays.
• To evaluate the ability of current assays to determine the clinical relevance of HLA antibodies.
• To highlight limitations of solid-phase assays that are often overlooked.

Main Methods:

• Review of solid-phase antibody detection assays for HLA antibodies.
• Analysis of the historical and current approaches to antibody identification.
• Discussion of the sensitivity and specificity of modern antibody detection technologies.

Main Results:

• Solid-phase assays have significantly improved the ability to detect HLA antibodies, enabling virtual crossmatching.
• These assays provide high sensitivity and specificity in identifying the presence of HLA antibodies.
• The clinical relevance of detected HLA antibodies remains a complex question that current assays do not fully resolve.

Conclusions:

• Solid-phase antibody detection assays offer significant advantages over older methods.
• Limitations of these advanced assays are frequently disregarded.
• A critical evaluation of both the strengths and weaknesses of solid-phase antibody detection is necessary.