Autoimmune diseases affect an estimated 50 million Americans, and many remain undiagnosed for years. These chronic conditions occur when the immune system, designed to protect you from infection, mistakenly attacks healthy tissues in the body—leading to a wide range of symptoms that are often misunderstood or misdiagnosed.

If you’ve been struggling with persistent fatigue, joint pain, dry eyes, rashes, or inflammation, an autoimmune condition could be at the root of your symptoms.

At Labs By Request, we offer a detailed Autoimmune Antibody Profile Blood Test—a lab panel that checks for specific immune markers to help detect and differentiate autoimmune disorders early and accurately.

What Are Autoantibodies and Why Are They Important?

Autoantibodies are proteins produced by the immune system that mistakenly target your body’s own cells, tissues, or organs. Their presence in the blood often signals an autoimmune condition and can provide insight into which type of disease is present, how active it is, and whether it’s affecting specific organs.

While a basic ANA (antinuclear antibody) test is a good starting point, it often doesn’t tell the whole story. The Autoimmune Antibody Profile goes deeper, checking for multiple antibodies to help clarify diagnosis and guide appropriate treatment.

 What Does the Autoimmune Antibody Profile Test Include?

This panel evaluates more than 15 specific biomarkers, including:

🔹 Rheumatoid Factor (RF) & CCP IgG

Indicators of rheumatoid arthritis (RA), especially when both are elevated. CCP is more specific and can detect RA even before joint damage appears.

🔹 dsDNA & Smith (Sm) Antibodies

Key markers for systemic lupus erythematosus (SLE). Anti-dsDNA is often linked to kidney involvement, while anti-Sm is highly specific to lupus.

🔹 SS-A (Ro) & SS-B (La)

Frequently found in Sjögren’s syndrome, which causes dry eyes, dry mouth, and fatigue. These antibodies may also appear in lupus patients.

🔹 Complement C3 & C4

Low levels can indicate active immune system attack, particularly in lupus. These proteins help track disease progression and flare-ups.

🔹 Scl-70 & Centromere B

Associated with different forms of scleroderma—a disease that leads to hardening of the skin and internal organs.

🔹 Jo-1 Antibody

Seen in polymyositis and dermatomyositis, which affect the muscles and may lead to lung inflammation.

🔹 Thyroid Peroxidase (TPO) Antibody

Indicates autoimmune thyroid diseases, such as Hashimoto’s thyroiditis or Graves’ disease.

🔹 RNP & SmRNP

These markers are common in mixed connective tissue disease (MCTD) and can also be found in lupus, scleroderma, and polymyositis.

🔹 Chromatin & Ribosomal P Antibodies

Less commonly tested but still important in evaluating lupus—especially if neurological symptoms are involved.

 Why Consider This Test?

Autoimmune diseases can affect multiple systems in the body—joints, muscles, skin, glands, nerves, and internal organs. Their symptoms are often vague or overlap with other conditions, which is why a broad test panel like this one is so helpful.

You may benefit from this test if you:

  • Have ongoing joint pain, fatigue, or swelling

  • Have a family history of autoimmune disease

  • Tested positive for ANA and need further investigation

  • Experience chronic rashes, dryness, or neurological symptoms

  • Have thyroid symptoms but normal TSH levels