Anti-alpha4-integrin inhibitor, Tysabri drug and antibody testing, biological monitoring
18 days
Electrochemiluminescence Immunoassay (ECLIA)
Accredited Laboratory Partner
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Measures drug level and antibodies to natalizumab. Used in MS treatment monitoring.
Serum
2 mL
Red-top tube or gel-barrier tube
No special preparation is required for this test. You may eat, drink, and take your medications as normal, unless instructed otherwise by your healthcare provider.
Allow a minimum clotting time of 30 to 60 minutes with serum separation within 2 hours of collection. Send serum in a plastic transport tube. To avoid delays in turnaround time when requesting multiple tests on frozen samples, please submit separate frozen specimens for each test requested.
| Temperature | Period |
|---|---|
| Room temperature | 14 days |
| Refrigerated | 14 days |
| Frozen | 14 days |
| Freeze/thaw cycles | stable x6 |