Ulta Lab Tests

Interferon Alpha Test

Measures interferon-alpha (IFN-α), a key immune signaling protein involved in antiviral, antiparasitic, and immune activation responses. Elevated levels may indicate recent or ongoing infection.

Serum
Phlebotomist
Interferon Alpha, IFN-α, IFN Alpha Cytokine Test, Interferon-α Serum Test, Type I Interferon (Alpha)
There are no preparation instructions.

The following is a list of what is included in the item above. Click the test(s) below to view what biomarkers are measured along with an explanation of what the biomarker is measuring.

Interferon Alpha

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The Interferon Alpha Test test contains 1 test with 1 biomarker .

The Interferon Alpha (IFN-α) Test measures the level of interferon-alpha, a critical signaling protein (cytokine) involved in the body’s immune response to infections and abnormal cell activity.

What Is Interferon Alpha?

Interferon-alpha (IFN-α) is primarily produced by:

  • Monocytes and macrophages

  • Lymphoblastic cells

  • Fibroblasts

In addition, many virus-activated cells throughout the body can produce IFN-α in response to immune stimulation.

Role in the Immune System

Interferon-alpha plays a key role in immune defense and regulation. It has well-documented:

  • Antiviral properties – inhibits viral replication and spread

  • Antiparasitic effects – supports immune response against parasitic infections

  • Antiproliferative activity – helps regulate abnormal cell growth

By activating immune pathways, IFN-α helps coordinate the body’s early response to infectious threats.

Clinical Significance of Elevated Levels

Increased interferon-alpha levels may indicate:

  • Recent or ongoing viral infection

  • Active parasitic infection

  • Heightened immune system activation

Elevated IFN-α is often associated with acute immune responses and may be useful in evaluating patients with unexplained inflammation, recurrent infections, or suspected immune dysregulation.

Why This Test May Be Ordered

A healthcare provider may order the Interferon Alpha Test to:

  • Assess immune system activation

  • Support evaluation of viral or parasitic infections

  • Aid in the investigation of chronic inflammatory or immune-mediated conditions

  • Provide additional insight in complex or unexplained clinical presentations

Important Notes

  • Test results should always be interpreted in clinical context, alongside symptoms and other laboratory findings.

  • Elevated or abnormal results do not diagnose a specific condition on their own but can guide further evaluation.

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