RT Journal Article SR Electronic T1 A 24-month open-label study of canakinumab in neonatal-onset multisystem inflammatory disease JF Annals of the Rheumatic Diseases JO Ann Rheum Dis FD BMJ Publishing Group Ltd and European League Against Rheumatism SP 1714 OP 1719 DO 10.1136/annrheumdis-2013-204877 VO 74 IS 9 A1 Cailin H Sibley A1 Andrea Chioato A1 Sandra Felix A1 Laurence Colin A1 Abhijit Chakraborty A1 Nikki Plass A1 Jackeline Rodriguez-Smith A1 Carmen Brewer A1 Kelly King A1 Christopher Zalewski A1 H Jeffrey Kim A1 Rachel Bishop A1 Ken Abrams A1 Deborah Stone A1 Dawn Chapelle A1 Bahar Kost A1 Christopher Snyder A1 John A Butman A1 Robert Wesley A1 Raphaela Goldbach-Mansky YR 2015 UL http://ard.bmj.com/content/74/9/1714.abstract AB Objective To study efficacy and safety of escalating doses of canakinumab, a fully human anti-IL-1β monoclonal antibody in the severe cryopyrin-associated periodic syndrome, neonatal-onset multisystem inflammatory disease (NOMID).Methods 6 patients were enrolled in this 24-month, open-label phase I/II study. All underwent anakinra withdrawal. The initial subcutaneous canakinumab dose was 150 mg (or 2 mg/kg in patients ≤40 kg) or 300 mg (or 4 mg/kg) with escalation up to 600 mg (or 8 mg/kg) every 4 weeks. Full remission was remission of patient-reported clinical components and measures of systemic inflammation and CNS inflammation. Hearing, vision and safety were assessed. Primary endpoint was full remission at month 6.Results All patients flared after anakinra withdrawal, and symptoms and serum inflammatory markers improved with canakinumab. All patients required dose escalation to the maximum dose. At month 6, none had full remission, although 4/6 achieved inflammatory remission, based on disease activity diary scores and normal C-reactive proteins. None had CNS remission; 5/6 due to persistent CNS leucocytosis. At the last study visit, 5/6 patients achieved inflammatory remission and 4/6 had continued CNS leucocytosis. Visual acuity and field were stable in all patients, progressive hearing loss occurred in 1/10 ears. Adverse events (AEs) were rare. One serious AE (abscess due to a methicillin-resistant Staphylococcus aureus infection) occurred.Conclusions Canakinumab at the studied doses improves symptoms and serum inflammatory features of NOMID, although low-grade CNS leukocytosis in four patients and headaches in one additional patient persisted. Whether further dose intensifications are beneficial in these cases remains to be assessed.ClinicalTrials.gov identifier NCT00770601.