Interleukin-2 Receptor Alpha Chain (IL-2Ra/CD25), Soluble
Test Summary
Following stimulation by antigen, IL-2R is expressed on all T cells. IL-2R is released by activated cells into the surrounding extracellular fluid. IL2-R is involved in infectious, inflammatory and autoimmune diseases, cancer, and transplantation. IL-2R Antibodies are used therapeutically.
Cytokine levels may demonstrate diurnal variation. Recommend cytokine levels be determined at the same time of day for improved longitudinal comparison.
Aliases
- N/A
Specimen Collection
Special Instructions
N/A
Preferred Specimen
1 mL frozen serum collected in a red-top tube (no gel)
Minimum Volume
0.5 mL
Instructions
IL-2R levels may demonstrate diurnal variation. Recommend IL-2R levels be determined at the same time of day for improved longitudinal comparison.
Patient Preparation
No biotin supplements 48 hours prior to blood draw.
Storage
N/A
Transport Temperature
Frozen
Specimen Stability
- Room temperature: Unacceptable
- Refrigerated: 24 hours
- Frozen: 30 days
Limitations
N/A
Other Acceptable Specimens
N/A
Unacceptable Specimens
Serum separator tube (SST) • Plasma
Order Code
IL2R
EPIC (Premier) Code
LAB6358
Includes
N/A
CPT Code
- 83520
Billing Code
- 671199
CPT Statement
Methodology
Immunoassay (IA)
FDA Status
This test was performed using a kit that has not been cleared or approved by the FDA. The analytical performance characteristics of this test have been determined by Quest Diagnostics. This test should not be used for diagnosis without confirmation by other medically established means.
Physician Attestation of Informed Consent
N/A
Testing Laboratory
Quest Diagnostics Nichols Institute
33608 Ortega Highway
San Juan Capistrano CA, 92675
33608 Ortega Highway
San Juan Capistrano CA, 92675
Department
Reference Testing
Reference Range
532-1891 pg/mL
Setup Schedule / Expected Turnaround Time
Wednesday; Report available: 2 - 10 days
Specimen Collection
Special Instructions
N/A
Preferred Specimen
1 mL frozen serum collected in a red-top tube (no gel)
Minimum Volume
0.5 mL
Instructions
IL-2R levels may demonstrate diurnal variation. Recommend IL-2R levels be determined at the same time of day for improved longitudinal comparison.
Patient Preparation
No biotin supplements 48 hours prior to blood draw.
Storage
N/A
Transport Temperature
Frozen
Specimen Stability
- Room temperature: Unacceptable
- Refrigerated: 24 hours
- Frozen: 30 days
Limitations
N/A
Other Acceptable Specimens
N/A
Unacceptable Specimens
Serum separator tube (SST) • Plasma
Result Information
Methodology
Immunoassay (IA)
Testing Laboratory
N/A
Reference Range
532-1891 pg/mL
Setup Schedule / Expected Turnaround Time
Wednesday; Report available: 2 - 10 days