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Rowland P, McNicol M, Kiel A, Maltz RM, Donegan A, Dotson JL, Michel HK, Boyle B. Proactive therapeutic drug monitoring and vedolizumab dose optimization in children with inflammatory bowel disease. J Pediatr Gastroenterol Nutr 2024; 78:853-861. [PMID: 38270212 DOI: 10.1002/jpn3.12132] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/07/2023] [Revised: 12/12/2023] [Accepted: 01/03/2024] [Indexed: 01/26/2024]
Abstract
OBJECTIVES Therapeutic drug monitoring (TDM) and dose optimization have been shown to improve clinical outcomes with antitumor necrosis factor and recent studies in adults suggest an exposure-response relationship with drug levels associated with improved clinical outcomes. However, these levels are not universally recognized as therapeutic targets for vedolizumab dosing. We aimed to assess the impact of a TDM quality improvement (QI) initiative on 52-week clinical outcomes and describe proactively obtained vedolizumab levels during the induction period in children with inflammatory bowel disease (IBD). METHODS A QI initiative to proactively obtain TDM levels at Week 6 was implemented in 2019. A retrospective review of pediatric patients with IBD treated with vedolizumab from 2018 to 2022 was performed. Baseline demographic data, medication dosing details, disease characteristics, lab results, and 12-month clinical outcomes were recorded. For this study, we defined therapeutic target levels (>20 μg/mL at Week 6 and >12 μg/mL during maintenance) based on existing data correlating these levels with improved clinical outcomes. RESULTS Fifty-nine patients (31 Crohn disease [CD], 28 ulcerative colitis [UC]/indeterminate colitis [IC]) were included in the study. In total, 68% (40/59) of patients had vedolizumab levels at Week 6 and 90% (53/59) had levels drawn at Week 6 or 14. Thirty-five percent of Week 6 trough levels were below our defined target of 20 μg/mL. Fifty-two of 59 patients had available data at 52 weeks. Over 80% (42/52) of patients remained on vedolizumab 52 weeks after initiation (CD 79% [23/29], UC/IC 83% [19/23]). Sixty-two percent (26/42) of patients that remained on vedolizumab at 52 weeks were treated with an intensified dosing interval of <8 weeks. Thirty-one of these 42 (74%) were in clinical remission (CR) rate at 52 weeks with 29/42 (69%) in corticosteroid-free remission. The CR rate for the entire cohort including those who discontinued therapy due to a lack of efficacy before 52 weeks was 60% (31/52). CONCLUSION Proactive TDM and early dose optimization with vedolizumab may improve drug durability and clinical outcomes in pediatric patients with IBD.
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Affiliation(s)
- Patrick Rowland
- Division of Gastroenterology and Hepatology, Nationwide Children's Hospital, Columbus, Ohio, USA
| | - Megan McNicol
- Division of Gastroenterology and Hepatology, Nationwide Children's Hospital, Columbus, Ohio, USA
- Department of Pharmacy, Nationwide Children's Hospital, Columbus, Ohio, USA
| | - Ashley Kiel
- Division of Gastroenterology and Hepatology, Nationwide Children's Hospital, Columbus, Ohio, USA
| | - Ross M Maltz
- Division of Gastroenterology and Hepatology, Nationwide Children's Hospital, Columbus, Ohio, USA
- The Ohio State University College of Medicine, Columbus, Ohio, USA
| | - Amy Donegan
- Division of Gastroenterology and Hepatology, Nationwide Children's Hospital, Columbus, Ohio, USA
| | - Jennifer L Dotson
- Division of Gastroenterology and Hepatology, Nationwide Children's Hospital, Columbus, Ohio, USA
- Department of Pharmacy, Nationwide Children's Hospital, Columbus, Ohio, USA
- Center for Child Health Equity and Outcomes Research, Columbus, Ohio, USA
| | - Hilary K Michel
- Division of Gastroenterology and Hepatology, Nationwide Children's Hospital, Columbus, Ohio, USA
- Department of Pharmacy, Nationwide Children's Hospital, Columbus, Ohio, USA
| | - Brendan Boyle
- Division of Gastroenterology and Hepatology, Nationwide Children's Hospital, Columbus, Ohio, USA
- The Ohio State University College of Medicine, Columbus, Ohio, USA
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