2017
DOI: 10.1016/j.cgh.2016.11.023
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Association Between Low Trough Levels of Vedolizumab During Induction Therapy for Inflammatory Bowel Diseases and Need for Additional Doses Within 6 Months

Abstract: In a prospective study of patients with CD or UC receiving induction therapy with vedolizumab, low trough levels of vedolizumab at Week 6 (<19.0 μg/mL) are associated with need for additional doses (given at Week 10 and then every 4 weeks). All patients receiving these additional doses achieved a clinical response 4 weeks later.

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Cited by 108 publications
(122 citation statements)
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“…In that study, in which rates of mucosal healing improved with increasing vedolizumab concentration quartiles, the highest vedolizumab concentration quartile at week 6 corresponded to a concentration of >35.7 μg/mL. In contrast, a study by Williet et al reported that vedolizumab trough concentrations of <18.5 µg/mL at week 6 were associated with a need for drug optimisation within 6 months, with an AUROC of 72% . However, that study differed from the present analysis in a number of ways: the Williet et al study was rather small, with only 47 patients in total; two‐thirds of the patients in that study had CD, which may be important because the observed vedolizumab dose‐response relationship was less consistent in GEMINI 2 (CD) compared with GEMINI 1 (UC); and that study did not adjust for factors known to affect vedolizumab clearance.…”
Section: Discussioncontrasting
confidence: 71%
“…In that study, in which rates of mucosal healing improved with increasing vedolizumab concentration quartiles, the highest vedolizumab concentration quartile at week 6 corresponded to a concentration of >35.7 μg/mL. In contrast, a study by Williet et al reported that vedolizumab trough concentrations of <18.5 µg/mL at week 6 were associated with a need for drug optimisation within 6 months, with an AUROC of 72% . However, that study differed from the present analysis in a number of ways: the Williet et al study was rather small, with only 47 patients in total; two‐thirds of the patients in that study had CD, which may be important because the observed vedolizumab dose‐response relationship was less consistent in GEMINI 2 (CD) compared with GEMINI 1 (UC); and that study did not adjust for factors known to affect vedolizumab clearance.…”
Section: Discussioncontrasting
confidence: 71%
“…These AVA disappeared over time, confirming that antibodies to vedolizumab are transient . Multiple studies have reported low immunogenicity of vedolizumab with AVA development rates ranging from 0.0% to 4.1%, most of these using a drug‐sensitive assay . In our study, the immunogenicity rate is higher, most likely due to the sole inclusion of patients who discontinued vedolizumab therapy and the drug‐tolerant nature of the assay.…”
Section: Discussionmentioning
confidence: 94%
“…Antidrug antibodies are frequently underestimated because most of the commonly used assays are not drug‐tolerant and are unable to detect antidrug antibodies in the presence of drug. Consequently, the 4% antidrug antibody positivity during vedolizumab treatment observed in the GEMINI trials might be an underestimation …”
Section: Introductionmentioning
confidence: 99%
“…While TDM has been extensively studied and implemented when using tumour necrosis factor‐α (TNFα) antagonists, it's role in the optimisation of vedolizumab is unclear. Vedolizumab trough concentrations have been variably associated with clinical outcomes in patients with IBD, with some studies suggesting higher vedolizumab trough concentrations in patients responding to therapy, whereas others suggesting no differences in trough concentrations in responding vs nonresponding patients . In in vitro cell‐based assays, complete α 4 β 7 receptor saturation was reached at a vedolizumab serum concentration of approximately 1 μg/mL, a concentration considered subtherapeutic .…”
Section: Introductionmentioning
confidence: 99%