Background:
Ustekinumab is a human monoclonal antibody. It is directed against interleukin 12 and interleukin 23, naturally occurring proteins that regulate the immune system and immune-mediated nflammatory disorders. In two Phase III trials for moderate to severe psoriasis, the longest 76 weeks, ustekinumab was safe and effective. A third Phase III trial, ACCEPT, compared the efficacy and safety of ustekinumab with etanercept in the treatment of moderate to severe plaque psoriasis. This trial found a significantly higher clinical response with ustekinumab over the 12-week study period compared to high-dose etanercept. It also demonstrated the clinical benefit of ustekinumab among patients who failed to respond to etanercept. Ustekinumab is approved in Canada, Europe and the United States to treat moderate to severe plaque psoriasis.
Intended Use:
For Estimation of Ustekinumab (STELARA) in human serum and plasma. Please note the kit has not been optimized to be used for any other animal species. Should you require a specific sera tested, please connect with us at sales@krishgen.com for optimization.
Principle:
The method employs the quantitative sandwich enzyme immunoassay technique. Antibodies to Ustekinumab are pre-coated onto microwells. Samples and standards are pipetted into microwells and human Ustekinumab present in the sample are bound by the capture antibody. Then, a HRP (horseradish peroxidase) conjugated anti-Ustekinumab antibody is pipetted and incubated. After washing microwells in order to remove any nonspecific binding, the ready to use substrate solution (TMB) is added to microwells and color develops proportionally to the amount of Ustekinumab in the sample. Color development is then stopped by addition of stop solution. Absorbance is measured at 450 nm.
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