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Adalimumab Activity and Neutralizing Antibody
2011248
Ordering Recommendation

Evaluate response failure to adalimumab therapy. Determine and adjust dosage or identify the need for change to another anti-TNF-α inhibitor.

Mnemonic
ADA NAB
Methodology
Cell Culture/Quantitative Chemiluminescent Immunoassay/ Semi-Quantitative Chemiluminescent Immunoassay
Performed
Mon,Wed,Thu,Sat
Reported
2-3 days
New York DOH Approval Status
This test is New York DOH approved.
Submit With Order
ARUP Consult®
Disease Topics
Specimen Required
Patient Preparation
Collect specimens before adalimumab treatment. 
Collect
Serum separator tube. 
Specimen Preparation
Separate serum from cells ASAP or within 2 hours of collection. Transfer 1 mL serum to an ARUP Standard Transport Tube. (Min: 0.3 mL) 
Storage/Transport Temperature
Refrigerated. 
Unacceptable Conditions
Contaminated, hemolyzed, icteric, or lipemic specimens. 
Remarks
 
Stability
After separation from cells: Ambient: 48 hours; Refrigerated: 4 weeks; Frozen: 1 year (avoid repeated freeze/thaw cycles) 
Reference Interval
Available SeparatelyComponentsReference Interval
NoAdalimumab ActivityNot Detected
NoAdalimumab Neutralizing AntibodyNot Detected

Interpretive Data
This test measures the capacity of adalimumab to neutralize TNF-activity. Additionally, adalimumab neutralizing antibodies (NAb) are titered (reporting the highest dilution of patient sera in which NAb activity is detected).

This test is used to evaluate secondary response failures to adalimumab therapy. Secondary response failure is defined as loss of clinical response after initial improvement of clinical signs and symptoms. Therapeutic decision should rest on both the clinical response and the knowledge of the fate of the drug including the emergence of immunogenicity in individual patients.

Circulating adalimumab levels have been shown to vary considerably between patients. These differences relate to route and frequency of administration and patient-related features such as age, gender, weight, drug metabolism, and concomitant medications such as methotrexate and other immunosuppressants.

IF Adalimumab Activity is....AND Adalimumab Neutralizing Ab. Titer is....THEN....
Not DetectedNot DetectedA higher dosage of adalimumab or shortening the dosing interval may be appropriate.
Not Detected1:20 or greaterA change to another anti-TNF- drug may be appropriate.
0.65 ug/mL or greaterNot DetectedA change to another type of therapy (not targeting TNF-) may be appropriate.
0.65 ug/mL or greater1:20 or greaterRepeat testing is suggested to rule out decreasing adalimumab activity and/or increasing adalimumab neutralizing antibodies.

Compliance Statement B: This test was developed and its performance characteristics determined by ARUP Laboratories. The U.S. Food and Drug Administration has not approved or cleared this test; however, FDA clearance or approval is not currently required for clinical use. The results are not intended to be used as the sole means for clinical diagnosis or patient management decisions.

Note
This test is performed pursuant to an agreement with Biomonitor.
Components
Component Test Code*Component Chart NameLOINC
2011249Adalimumab Activity74117-3
2011250Adalimumab Neutralizing Antibody
2011251EER Adalimumab11526-1
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.
Aliases
  • Humira