The antiphospholipid and thrombosis syndromes

Area of Science:

• Hematology
• Immunology
• Vascular Medicine

Background:

• Antiphospholipid antibodies are linked to thrombosis, representing common acquired blood protein defects.
• The exact mechanisms by which these antibodies induce hypercoagulability are still under investigation.

Purpose of the Study:

• To highlight the association between anticardiolipin antibodies and lupus anticoagulant with various thrombotic events.
• To emphasize the importance of testing for these antibodies in unexplained thrombosis.
• To guide the classification of thrombotic syndromes and inform anticoagulant therapy.

Main Methods:

• Assessment of all three immunoglobulin isotypes (IgG, IgA, IgM) for anticardiolipin antibodies.
• Definition of thrombotic syndrome types (I-IV) associated with these antibodies.
• Utilizing definitive diagnostic tests like ELISA for anticardiolipin antibodies and dRVVT for lupus anticoagulant.

Main Results:

• Anticardiolipin antibodies are associated with deep vein thrombosis, pulmonary embolism, arterial thrombosis, and cerebrovascular events.
• Lupus anticoagulant-associated thrombosis predominantly involves venous events.
• Standard aPTT tests are unreliable for diagnosing lupus anticoagulant and anticardiolipin antibody-related thrombosis.

Conclusions:

• Testing for anticardiolipin antibodies and lupus anticoagulant is essential in patients with unexplained thrombosis.
• Identifying the specific syndrome type influences treatment decisions regarding anticoagulant therapy.
• Definitive diagnostic tests are recommended over aPTT for accurate diagnosis of antiphospholipid syndrome.