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Effectiveness and Safety of Adalimumab in Patients With Very Early-Onset Inflammatory Bowel Disease: A Retrospective Study on Behalf of the Porto Inflammatory Bowel Disease Working Group of European Society for Pediatric Gastroenterology Hepatology and Nutrition

. 2025 Jan 15 ; () : . [epub] 20250115

Status Publisher Language English Country Great Britain, England Media print-electronic

Document type Journal Article

BACKGROUND AND AIMS: Patients with very early-onset inflammatory bowel disease (VEO-IBD), with an age of onset < 6 years, can present with severe manifestations and may require biologic therapy. Infliximab and adalimumab are approved for induction and maintenance in pediatric IBD patients but are licensed only above the age of 6 years. Effectiveness and safety data on adalimumab in this patient population are lacking. We assessed the therapeutic response to help close this gap. METHODS: This retrospective study involved 30 sites worldwide. Demographic, clinical, and laboratory data were collected from patients with VEO-IBD who commenced adalimumab therapy before the age of 6 years. RESULTS: Seventy-eight patients (37 Crohn's disease, 26 ulcerative colitis, and 15 with IBD-unclassified) were included. Median age of IBD onset was 2.6 (1.3-4.1) years, with 30 (38.5%) patients diagnosed at age <2 years. Median age at adalimumab initiation was 4.2 (2.8-5.1) years. Adalimumab was used as second-line biologic therapy in 45 (57.7%) patients after infliximab. The median time to last follow-up was 63 (22-124) weeks. Significant improvement in clinical scores, CRP, fecal calprotectin, and weight Z-score were observed by Week 52. Adalimumab durability rates were 61.9%, 48.1%, and 35.6% after 1, 2, and 3 years, respectively. Drug discontinuation rates were not dependent on IBD type, age, prior anti-TNF exposure, or concomitant immunomodulatory treatment. Four (5.1%) patients developed serious infections, including 1 patient with TTC7A deficiency who died following adenovirus sepsis. CONCLUSION: Adalimumab therapy is a viable therapeutic option in patients with VEO-IBD with an acceptable safety profile.

The study evaluates adalimumab’s effectiveness and safety in very early-onset inflammatory bowel disease patients. Significant improvements in clinical scores and inflammation markers were observed by Week 52, with durability rates declining over time. Adalimumab had an acceptable safety profile.

Department of Gastroenterology Hepatology and Nutrition Children's Hospital University Medical Centre Ljubljana 1000 Ljubljana Slovenia

Department of NEUROFARBA University of Florence 50121 Florence Italy

Department of Paediatric Gastroenterology and Hepatology University of Groningen University Medical Center Groningen 9713 GZ Groningen The Netherlands

Department of Paediatric Gastroenterology Erasmus University Medical Center Sophia Children's Hospital 3015 GD Rotterdam The Netherlands

Department of Paediatric Gastroenterology Royal Hospital for Children and Young People Edinburgh EH16 4TJ UK

Department of Paediatric Gastroenterology Southampton Children's Hospital Southampton SO16 6YD UK

Department of Paediatrics 2nd Faculty of Medicine Charles University and University Hospital Motol 150 06 Prague Czech Republic

Department of Paediatrics University College Dublin Dublin 4 Ireland

Department of Paediatrics University of Medicine and Health Sciences RCSI Dublin 2 Ireland

Department of Pediatric Gastroenterology Children's Hospital University of Helsinki and HUS 00290 Helsinki Finland

Department of Pediatrics Gastroenterology and Nutrition University Children's Hospital Jagiellonian University Medical College 31 008 Cracow Poland

Department of Pediatrics Paracelsus Medical University Salzburg 5020 Austria

Department of Pediatrics School of Medicine Kyungpook National University Daegu 41566 Republic of Korea

Department of Pediatrics University of Oxford Oxford OX3 9DU UK

Department of Translational Medical Science Section of Pediatrics University of Naples Federico 2 80131 Naples Italy

Department of Women's and Children's Health Pediatric Gastroenterology and Liver Unit Sapienza University of Rome Umberto 1 Hospital 00185 Rome Italy

Division of Clinical Epidemiology Department of Medicine Sona Karolinska Institutet 171 76 Stockholm Sweden

Division of Gastroenterology Hepatology and Nutrition Department of Pediatrics Boston Children's Hospital and Harvard Medical School Boston MA 02115 USA

Faculty of Medicine and Health Sciences Tel Aviv University Tel Aviv 6997801 Israel

Faculty of Medicine The Hebrew University of Jerusalem Jerusalem 9190500 Israel

Gastroenterology and Nutrition Department Hospital Infantil Universitario Niño Jesús 28009 Madrid Spain

Gastroenterology and Nutrition Unit Meyer Children's Hospital IRCCS 50139 Florence Italy

General Pediatrics and Pediatric Gastroenterology Justus Liebig University 35390 Giessen Germany

Icahn School of Medicine Mount Sinai Division of Pediatric Gastroenterology and Nutrition Department of Pediatrics New York NY 10029 USA

Institute for Maternal and Child Health IRCCS Burlo Garofolo 34137 Trieste Italy

Institute of Gastroenterology Nutrition and Liver Diseases Schneider Children's Medical Center of Israel Petach Tikva 4920235 Israel

Juliet Keidan Institute of Pediatric Gastroenterology and Nutrition Shaare Zedek Medical Center Jerusalem 9103102 Israel

National Institute for Health and Care Research Oxford Biomedical Research Centre Oxford OX3 9DU UK

Paediatric Gastroenterology Department Al Jalila Children's Specialty Hospital Mohammed Bin Rashid University Dubai Medical College Dubai United Arab Emirates

Paediatric Gastroenterology Royal London Children's Hospital Barts Health NHS Trust London E1 1FR UK

Pediatric Gastroenterology and Cystic Fibrosis Unit Department of Human Pathology in Adulthood and Childhood G Barresi University Hospital G Martino 98124 Messina Italy

Pediatric Gastroenterology and Hepatology Research Center Children's Medical Center Pediatrics Center of Excellence Tehran University of Medical Sciences 14197 33151 Tehran Islamic Republic of Iran

Pediatric Gastroenterology and Nutrition Unit Edmond and Lily Safra Children's Hospital Sheba Medical Center Tel Hashomer Ramat Gan 5262100 Israel

Pediatric Gastroenterology and Nutrition Unit Miguel Servet Hospital 50009 Zaragoza Spain

Pediatric Gastroenterology and Nutrition Unit Sachs' Children's Hospital 171 77 Stockholm Sweden

Pediatric Gastroenterology Institute Dana Dwek Children's Hospital Tel Aviv Sourasky Medical Center Tel Aviv 64239 Israel

Translational Gastroenterology Unit University of Oxford Oxford OX1 2JD UK

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