NAbFeron® (IFNB‑1) Neutralizing Antibody Test
Use
Detection of neutralizing antibodies to interferon‑beta‑1, particularly useful for monitoring patients with multiple sclerosis who are receiving interferon‑β‑1 therapy, as high titers of neutralizing antibodies may reduce clinical effectiveness of treatment.
Special Instructions
Not provided.
Limitations
False positive or false negative results may rarely occur. Results should be interpreted in context of the patient’s clinical presentation, medical history, and other laboratory data. The presence of neutralizing antibodies, especially at persistently high titers, may be associated with reduced therapeutic effectiveness ([mayocliniclabs.com](https://www.mayocliniclabs.com/test-catalog/Overview/91447?utm_source=openai)).
New York Approved
Methodology
Culture-based
Biomarkers
Result Turnaround Time
14-25 days
Related Documents
For more information, please review the documents below
Specimen
Serum
Volume
2 mL
Minimum Volume
0.5 mL
Container
Red‑top tube or Serum Separator Tube (SST)
Collection Instructions
Draw blood in a plain red‑top tube(s), serum gel tube is acceptable. Spin down and send 2 mL of serum. Sample needs to be collected either before treatment with interferon or more than 24 hours following the most recent dose. Patient should not be on steroid therapy for at least two weeks prior to testing.
Patient Preparation
Should not be on steroid therapy for at least two weeks prior to testing.
Stability Requirements
| Temperature | Period |
|---|---|
| Room Temperature | Ambient: 72 hours |
| Refrigerated | Refrigerated: 28 days |
| Frozen | Frozen: 180 days |