Anti-Cardiolipin Ab, IgA (RDL)

Serum
Optimal Result: 0 - 12 APL U/mL.

Anti-Cardiolipin antibodies (aCL) of the IgA class are autoantibodies that target cardiolipin, a phospholipid found in cell membranes. While less commonly discussed than their IgG and IgM counterparts, IgA anti-cardiolipin antibodies also play a role in autoimmune conditions, particularly antiphospholipid syndrome (APS).

APS is an autoimmune disorder characterized by an increased risk of blood clots (thrombosis) and pregnancy complications, including recurrent miscarriages. The presence of IgA anti-cardiolipin antibodies can contribute to the diagnostic criteria for APS, especially in patients who test negative for the more common IgG and IgM types but have clinical symptoms suggestive of APS.

Elevated levels of these antibodies might increase the risk of thrombotic events, such as deep vein thrombosis, stroke, or myocardial infarction. In pregnant women, they are associated with complications like preeclampsia, placental insufficiency, and fetal loss. The "RDL" in this context likely refers to the specific laboratory or method used for detecting these antibodies. Testing for IgA anti-cardiolipin antibodies is usually done through immunoassay techniques such as ELISA. However, the clinical significance of IgA anti-cardiolipin antibodies is still under investigation, and their presence alone, without clinical symptoms or other laboratory markers, is not sufficient for an APS diagnosis. Their interpretation often requires careful consideration within the broader context of the patient's clinical history and other test results.

What does it mean if your Anti-Cardiolipin Ab, IgA (RDL) result is too high?

Elevated levels of IgA class Anti-Cardiolipin antibodies (aCL) can indicate several clinical conditions and risks. They are a potential marker for antiphospholipid syndrome (APS), especially in patients who exhibit APS symptoms but test negative for the more common IgG and IgM anti-cardiolipin antibodies. These elevated levels are associated with an increased risk of thrombotic events, such as deep vein thrombosis, stroke, and myocardial infarction. In pregnancy, they can be linked to complications like recurrent miscarriages and preeclampsia. Elevated IgA aCL levels are also found in other autoimmune disorders. However, their clinical significance is still being researched, and their interpretation requires a comprehensive clinical assessment. The presence of these antibodies alone, without accompanying symptoms or other laboratory markers, does not conclusively diagnose APS.

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