Tysabri® (Natalizumab) Immunogenicity Test
New drugs such as Tysabri® offer highly specific and effective therapy for Multiple sclerosis patients. However, Tysabri® loses effectiveness when patients develop antibodies to the drug. Detecting these antibodies early allows healthcare providers the opportunity to prescribe alternative therapy and avoid the cost associated with failed therapy.
The assay is intended to detect anti-Tysabri antibodies in serum. In this binding assay, samples are run in both a screening and a confirmation assay on the same plate. The threshold for positive sample responses is 500 ng/mL, established by Biogen Idec to detect antibodies that are clinically meaningful. The performance characteristics of this test were determined by Viracor Eurofins. This test has not been cleared or approved for diagnostic use by the U.S. Food and Drug Administration.
5-7 business days from receipt of specimen
|Specimen Type||Order Code||CPT Code||NY Approved||Volume||Assay Range||Special Instructions|
|serum||30040||83516||Yes||1 mL (min. 100 uL)||Positive/Negative||
Samples will be reported as either postive or negative
Specimens are approved for testing in New York only when indicated in the Specimen Information field above.
The CPT codes provided are based on Viracor Eurofins' interpretation of the American Medical Association's Current Procedural Terminology (CPT) codes and are provided for general informational purposes only. CPT coding is the sole responsibility of the billing party. Questions regarding coding should be addressed to your local Medicare carrier. Viracor Eurofins assumes no responsibility for billing errors due to reliance on the CPT codes illustrated in this material.
van Regenmortel, M.H.V., Boven, K., & Bader, F. August 2005. Biopharm International. Immunogenicity of Biopharmaceuticals: An Example from Erythropoietin.
Mire-Sluis, A.R., Barrett, Y.C., et al. FDA. Recommendations for the Design and Optimization of Immunoassays Used in the Detection of Host Antibodies Against Biotechnology Products.