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Interleukin-3 receptor alpha (IL-3RA) concentration

Published: August 9, 2026Updated: August 16, 2026

This test measures the level of interleukin-3 receptor alpha, a protein involved in immune signaling that helps regulate white blood cell activity.

Quick summary

["Understanding your IL-3 receptor alpha levels may help assess immune function or response to certain conditions."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
70080-7
Short code
Il3 CSF-mCnc
Synonyms
Il3 CSF-mCnc
Category
chemistry
Sample
csf
Container
Sterile tube
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Specimen volume
1-2 mL
Stability
Immediate analysis required, Refrigerated: 1h
Hemolysis max
200
TAT
4–24 hours
Order
routine

What Does This Test Measure?

Interleukin-3 receptor alpha (IL-3RA) is a protein that binds to interleukin-3, a cytokine (signaling molecule) involved in the growth and differentiation of certain blood cells. This test detects its concentration in your blood, which can provide insights into immune system activity or potential inflammatory responses.

Why Might You Need This Test?

Doctors may order this test if you have symptoms or conditions linked to immune dysregulation, such as certain cancers (e.g., leukemia), autoimmune diseases, or infections. It may also be used in research or clinical trials studying immune-related therapies.

Sample Collection and Preparation

A blood sample is typically drawn from a vein in your arm. The sample is processed to separate serum or plasma for testing. This test may be performed using immunoassay methods to detect and quantify the protein.

Common Uses and Clinical Context

This test is less commonly performed in routine clinical practice but may be used in specialized settings, such as monitoring immune responses in patients receiving targeted therapies or studying rare genetic conditions affecting cytokine signaling.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

IL-3 receptor alpha blood test

Frequently asked questions

What does an abnormal IL-3RA level mean?
An abnormal result may signal an underlying condition affecting your immune system, such as a genetic disorder, immune-related cancer, or response to treatment. Your healthcare provider will discuss the results with you in relation to your specific situation.
How is this test different from other immune tests?
Unlike more commonly tested markers (e.g., CRP, cytokines like IL-6), IL-3RA is less frequently measured and focuses specifically on a receptor involved in interleukin-3 signaling. It may be used in niche clinical or research scenarios.
Can diet or lifestyle affect IL-3RA levels?
While diet and lifestyle factors may influence broader immune function, direct evidence linking IL-3RA levels specifically to diet or lifestyle is limited. Your provider may discuss how other health behaviors could impact your test results.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy