PMID- 34621712 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20211009 IS - 2296-2360 (Print) IS - 2296-2360 (Electronic) IS - 2296-2360 (Linking) VI - 9 DP - 2021 TI - Combination Immunotherapy Use and Withdrawal in Pediatric Inflammatory Bowel Disease-A Review of the Evidence. PG - 708310 LID - 10.3389/fped.2021.708310 [doi] LID - 708310 AB - Evidence-based guidelines have been developed outlining the concomitant use of anti-tumor necrosis factor alpha (anti-TNF) agents and immunomodulators including azathioprine (AZA) and methotrexate (MTX) in both adult and pediatric populations. However, there exists a paucity of data guiding evidence-based strategies for their withdrawal in pediatric patients in sustained remission. This narrative review focuses on the available pediatric evidence on this question in the context of what is known from the larger body of evidence available from adult studies. The objective is to provide clarity and practical guidance around who, what, when, and how to step down pediatric patients with inflammatory bowel disease (IBD) from combination immunotherapy. Outcomes following withdrawal of either of the two most commonly used anti-TNF therapies [infliximab (IFX) or adalimumab (ADA)], or immunomodulator therapies, from a combination regimen are examined. Essentially, a judicious approach must be taken to identify a significant minority of patients who would benefit from treatment rationalization. We conclude that step-down to anti-TNF (rather than immunomodulator) monotherapy after at least 6 months of sustained clinical remission is a viable option for a select group of pediatric patients. This group includes those with good indicators of mucosal healing, low or undetectable anti-TNF trough levels, lack of predictors for severe disease, and no prior escalation of anti-TNF therapy. Transmural healing and specific human leukocyte antigen (HLA) typing are some of the emerging targets and tools that may help facilitate improved outcomes in this process. We also propose a simplified evidence-based schema that may assist in this decision-making process. Further pediatric clinical studies are required to develop the evidence base for decision-making in this area. CI - Copyright (c) 2021 Meredith, Henderson, Wilson and Russell. FAU - Meredith, Joseph AU - Meredith J AD - Department of Paediatric Gastroenterology and Nutrition, Royal Hospital for Children and Young People, Edinburgh, United Kingdom. AD - Child Life and Health, College of Medicine and Veterinary Medicine, University of Edinburgh, Edinburgh, United Kingdom. FAU - Henderson, Paul AU - Henderson P AD - Department of Paediatric Gastroenterology and Nutrition, Royal Hospital for Children and Young People, Edinburgh, United Kingdom. AD - Child Life and Health, College of Medicine and Veterinary Medicine, University of Edinburgh, Edinburgh, United Kingdom. FAU - Wilson, David C AU - Wilson DC AD - Department of Paediatric Gastroenterology and Nutrition, Royal Hospital for Children and Young People, Edinburgh, United Kingdom. AD - Child Life and Health, College of Medicine and Veterinary Medicine, University of Edinburgh, Edinburgh, United Kingdom. FAU - Russell, Richard K AU - Russell RK AD - Department of Paediatric Gastroenterology and Nutrition, Royal Hospital for Children and Young People, Edinburgh, United Kingdom. AD - Child Life and Health, College of Medicine and Veterinary Medicine, University of Edinburgh, Edinburgh, United Kingdom. LA - eng PT - Journal Article PT - Review DEP - 20210921 PL - Switzerland TA - Front Pediatr JT - Frontiers in pediatrics JID - 101615492 PMC - PMC8490777 OTO - NOTNLM OT - anti-TNF OT - combination therapy OT - drug withdrawal OT - immunomodulators OT - pediatric inflammatory bowel disease (PIBD) COIS- DW has received speaker's fees, travel support, and participated in medical board meetings with AbbVie, Roche, and Nestle Heath Sciences. RR has received speaker's fees, travel support, and participated in medical board meetings with Abbvie, Janssen, Takeda, Celltrion, Pharmacosmos, and Nestle. The remaining authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest. EDAT- 2021/10/09 06:00 MHDA- 2021/10/09 06:01 PMCR- 2021/09/21 CRDT- 2021/10/08 07:11 PHST- 2021/05/11 00:00 [received] PHST- 2021/07/26 00:00 [accepted] PHST- 2021/10/08 07:11 [entrez] PHST- 2021/10/09 06:00 [pubmed] PHST- 2021/10/09 06:01 [medline] PHST- 2021/09/21 00:00 [pmc-release] AID - 10.3389/fped.2021.708310 [doi] PST - epublish SO - Front Pediatr. 2021 Sep 21;9:708310. doi: 10.3389/fped.2021.708310. eCollection 2021.