This test detects IgA-class antibodies directed against cardiolipin, a phospholipid found in cell membranes and platelets. These antibodies are part of the antiphospholipid antibody (aPL) family and can play a role in abnormal blood clotting.
Diagnostic Value: Anti-Cardiolipin IgA antibodies are used to help diagnose Antiphospholipid Syndrome (APS) — an autoimmune disorder that increases the risk of blood clots (thrombosis) and pregnancy complications, such as recurrent miscarriages.
Clinical Significance: While IgG and IgM are the most commonly used markers for APS, the IgA form can appear in patients who test negative for the other two. Therefore, testing for IgA helps identify cases of “seronegative” APS, ensuring a more complete evaluation.
Symptom Correlation: Patients with antiphospholipid antibodies may present with deep vein thrombosis, stroke, transient ischemic attacks, or unexplained pregnancy loss.
By detecting the IgA form of these antibodies, the Anti-Cardiolipin IgA test contributes to a comprehensive assessment of clotting risk and autoimmune activity, supporting accurate diagnosis and prevention of serious complications.