Current Controversies in Lupus Anticoagulant Detection

Area of Science:

• Hematology
• Immunology
• Clinical Chemistry

Background:

• Antiphospholipid syndrome (APS) is an autoimmune disorder characterized by thrombosis or pregnancy complications.
• Persistent antiphospholipid antibodies (aPLs), including lupus anticoagulants (LA), are diagnostic criteria.
• LA detection is challenging due to the lack of specific calibrators, relying on inference from coagulation assays.

Purpose of the Study:

• To review and discuss the main areas of debate in the detection and diagnosis of lupus anticoagulants (LA).
• To explore the complexities and controversies surrounding LA detection methodologies.
• To provide insights into the interpretation of coagulation assay results for LA identification.

Main Methods:

• Review of existing literature and guidelines on lupus anticoagulant detection.
• Analysis of various coagulation-based assays used for LA screening and confirmation.
• Discussion of interpretation strategies for raw data and mixing studies.

Main Results:

• LA detection relies on a combination of screening and confirmatory coagulation assays, often using different principles to account for antibody heterogeneity.
• Debate exists regarding the inclusion of specific assays (e.g., beyond dRVVT and aPTT) and the interpretation of mixing studies.
• Therapeutic anticoagulation complicates LA detection, necessitating careful interpretation and potential use of alternative reagents.

Conclusions:

• Accurate LA detection requires a multifaceted approach, employing multiple assays and careful data interpretation.
• Ongoing controversies in LA detection methodologies highlight the need for standardization and further research.
• Evolving techniques and reagent use continue to refine the ability to detect LA in complex clinical scenarios, including during anticoagulation therapy.