Vedolizumab ELISA Kit (Entyvio®) (ab264503) is a Solid phase enzyme-linked immunosorbent assay (ELISA) based on the sandwich principle. The color developed is proportional to the amount of Vedolizumab in the sample or standard.

Vedolizumab is a recombinant humanized IgG1 monoclonal antibody directed against the human lymphocyte α4β7 integrin, a key mediator of gastrointestinal inflammation. It is used in the treatment of moderate to severe active ulcerative colitis and Crohn's disease for patients who have had an inadequate response with, lost response to, or were intolerant to inhibitors of tumor necrosis factor-alpha (TNF-alpha) or other conventional therapies.