Extractable Nuclear Antigen (ENA profile)
Description
The ENA (Extractable Nuclear Antigen) Profile test detects specific autoantibodies in the blood that are linked to autoimmune diseases such as lupus, Sjögren’s syndrome, scleroderma, and mixed connective tissue disease. It helps determine the precise type of autoimmune disorder and guides treatment decisions. A blood sample is needed for this test.
How it works
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Blood sample collection: A blood sample is drawn from a vein.
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Laboratory analysis: The serum is tested using techniques such as ELISA (enzyme-linked immunosorbent assay) or immunoblotting to identify antibodies against specific ENA proteins (e.g., Ro/SSA, La/SSB, Sm, RNP, Scl-70, Jo-1).
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Interpreting results:
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Positive autoantibodies: Indicate the presence of certain autoimmune diseases and help pinpoint the type of disorder.
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Negative autoantibodies: Suggest a lower likelihood of these specific autoimmune conditions.
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This test helps doctors confirm and differentiate between autoimmune diseases, allowing for more targeted treatment.
Test Preparations
The ENA (Extractable Nuclear Antigen) Profile test detects specific autoantibodies in the blood that are linked to autoimmune diseases such as lupus, Sjögren’s syndrome, scleroderma, and mixed connective tissue disease. It helps determine the precise type of autoimmune disorder and guides treatment decisions. A blood sample is needed for this test.
