BETA 2 GLYCOPROTEIN IGG, SERUM

Beta-2 Glycoprotein IgG, Serum

What it is

The Beta-2 Glycoprotein IgG antibody test measures IgG autoantibodies directed against Beta-2 Glycoprotein I (β2GPI), a plasma protein involved in blood clotting regulation. These antibodies are part of the antiphospholipid antibody (APLA) family and are commonly associated with Antiphospholipid Syndrome (APS).

Uses

This test is used to diagnose Antiphospholipid Syndrome (APS), evaluate patients with unexplained blood clots, investigate recurrent miscarriages, and assess the risk of stroke, heart attack, or deep vein thrombosis. It is often ordered along with Beta-2 Glycoprotein IgM, IgA, anticardiolipin antibodies, and lupus anticoagulant tests.

Symptoms That May Lead to the Test

Doctors may recommend this test if you experience deep vein thrombosis (DVT), pulmonary embolism, stroke or transient ischemic attack at a young age, repeated pregnancy loss, stillbirth, severe preeclampsia, skin changes like livedo reticularis, or unexplained prolonged clotting times.

Abnormal Results

Positive Beta-2 Glycoprotein IgG: Suggests the presence of Antiphospholipid Syndrome if antibodies persist for 12 weeks or more. Associated with a higher risk of thrombosis and pregnancy loss. Must be interpreted with clinical history and other APLA tests.

Negative Result: No detectable IgG antibodies. However, APS cannot be ruled out, as patients may have IgM or IgA positivity.

Risks

The test involves a routine blood draw and carries minimal risks. Mild pain, bruising, or bleeding at the puncture site may occur, and rarely dizziness or infection.