Publication date: Available online 16 December 2017
Source:The Journal of Allergy and Clinical Immunology: In Practice
Author(s): Necdet B. Gunsoy, Sarah M. Cockle, Steven W. Yancey, Oliver N. Keene, Eric S. Bradford, Frank C. Albers, Ian D. Pavord
BackgroundMepolizumab significantly reduces exacerbations in patients with severe eosinophilic asthma. The early identification of patients likely to receive long-term benefit from treatment could ensure effective resource allocation.ObjectiveTo assess potential continuation rules for mepolizumab in addition to initiation criteria defined as 2 or more exacerbations in the previous year and blood eosinophil counts of 150 cells/μL or more at initiation or 300 cells/μL or more in the previous year.MethodsThis post hoc analysis included data from 2 randomized, double-blind, placebo-controlled studies (NCT01000506 and NCT01691521) of mepolizumab in patients with severe eosinophilic asthma (N = 1,192). Rules based on blood eosinophils, physician-rated response to treatment, FEV1, Asthma Control Questionnaire (ACQ-5) score, and exacerbation reduction were assessed at week 16. To assess these rules, 2 key metrics accounting for the effects observed in the placebo arm were developed.ResultsPatients not meeting continuation rules based on physician-rated response, FEV1, and the ACQ-5 score still derived long-term benefit from mepolizumab. Nearly all patients failing to reduce blood eosinophils had counts of 150 cells/μL or less at baseline. For exacerbations, assessment after 16 weeks was potentially premature for predicting future exacerbations.ConclusionThere was no evidence of a reliable physician-rated response, ACQ-5 score, or lung function–based continuation rule. The added value of changes in blood eosinophils at week 16 over baseline was marginal. Initiation criteria for mepolizumab treatment provide the best method for assessing patient benefit from mepolizumab treatment, and treatment continuation should be reviewed on the basis of a predefined reduction in long-term exacerbation frequency and/or oral corticosteroid dose.
Medicine by Alexandros G. Sfakianakis,Anapafseos 5 Agios Nikolaos 72100 Crete Greece,00306932607174,00302841026182,alsfakia@gmail.com
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Δευτέρα 18 Δεκεμβρίου 2017
Evaluation of Potential Continuation Rules for Mepolizumab Treatment of Severe Eosinophilic Asthma
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