Impact of Interleukin-1 Blockade on the Development of Macrophage Activation Syndrome in Still Disease: Incidence and Diagnostic Validity of the EULAR/ACR/PRINTO 2016 MAS Classification Criteria.

Objective: To evaluate the applicability of the 2016 European Alliance of Associations for Rheumatology (EULAR)/American College of Rheumatology (ACR)/Paediatric Rheumatology International Trials Organisation (PRINTO) macrophage activation syndrome (MAS) classification criteria in patients with Still disease and systemic juvenile idiopathic arthritis (sJIA-SD) treated with interleukin-1 (IL-1)-targeted therapy and to assess the incidence of MAS in this context.

Methods: We analyzed retrospective and prospective data from Dutch patients with sJIA-SD (diagnosis 2008-2017, n = 54) and data from a nationwide prospective Dutch cohort and intervention study (diagnosis 2017-2022, n = 66). From these cohorts, MAS episodes developing in patients with sJIA-SD treated with IL-1-targeted therapy (anakinra or canakinumab) with at least two years of follow-up were selected.

Recombinant Interleukin-1 Receptor Antagonist Is an Effective First-Line Treatment Strategy in New-Onset Systemic Juvenile Idiopathic Arthritis, Irrespective of HLA-DRB1 Background and IL1RN Variants.

Objective: Human leukocyte antigen (HLA)-DRB1*15:01 has been recently associated with interstitial lung disease (LD), eosinophilia, and drug reactions in systemic juvenile idiopathic arthritis (sJIA). Additionally, genetic variants in IL1RN have been linked to poor response to anakinra. We sought to reproduce these findings in a prospective cohort study of patients with new-onset sJIA treated with anakinra as first-line therapy.

Research agenda setting with children with juvenile idiopathic arthritis: Lessons learned.

Aim: The aim of this qualitative study is to understand the research priorities of Dutch children with juvenile idiopathic arthritis (JIA) as well as researching how children can be involved.

Background: Several health research agendas have successfully been developed with adults but rarely with children. Children are still seldom recognized as possessing credible knowledge about their own body and life.

Dutch patients, caregivers and healthcare professionals generate first nationwide research agenda for juvenile idiopathic arthritis.

Background: Involving the end-users of scientific research (patients, carers and clinicians) in setting research priorities is important to formulate research questions that truly make a difference and are in tune with the needs of patients. We therefore aimed to generate a national research agenda for Juvenile Idiopathic Arthritis (JIA) together with patients, their caregivers and healthcare professionals through conducting a nationwide survey among these stakeholders.

Methods: The James Lind Alliance method was used, tailored with additional focus groups held to involve younger patients.

Recommendations from a James Lind Alliance priority setting partnership - a qualitative interview study.

Background: The James Lind Alliance (JLA) offers a method for research priority setting with patients, clinicians and carers. The method is increasingly used but publications primarily discuss the outcome of such projects, rather than reflecting on the JLA method itself. Scrutiny of the method is crucial in order to understand and correctly interpret its outcomes.

Dutch juvenile idiopathic arthritis patients, carers and clinicians create a research agenda together following the James Lind Alliance method: a study protocol.

Background: Research on Juvenile Idiopathic Arthritis (JIA) should support patients, caregivers/parents (carers) and clinicians to make important decisions in the consulting room and eventually to improve the lives of patients with JIA. Thus far these end-users of JIA-research have rarely been involved in the prioritisation of future research.

Main Body: Dutch organisations of patients, carers and clinicians will collaboratively develop a research agenda for JIA, following the James Lind Alliance (JLA) methodology.

Reversal of Sepsis-Like Features of Neutrophils by Interleukin-1 Blockade in Patients With Systemic-Onset Juvenile Idiopathic Arthritis.

Objective: Neutrophils are the most abundant innate immune cells in the blood, but little is known about their role in (acquired) chronic autoinflammatory diseases. This study was undertaken to investigate the role of neutrophils in systemic-onset juvenile idiopathic arthritis (JIA), a prototypical multifactorial autoinflammatory disease that is characterized by arthritis and severe systemic inflammation.

Methods: Fifty patients with systemic-onset JIA who were receiving treatment with recombinant interleukin-1 receptor antagonist (rIL-1Ra; anakinra) were analyzed at disease onset and during remission.

The human microbiome and juvenile idiopathic arthritis.

Juvenile idiopathic arthritis (JIA) is the most common rheumatic disease in childhood. The pathogenesis of JIA is thought to be the result of a combination of host genetic and environmental triggers. However, the precise factors that determine one's susceptibility to JIA remain to be unravelled.

Prediction of relapse after discontinuation of infliximab therapy in severe sarcoidosis.

Infliximab is effective as a third-line therapeutic for severe sarcoidosis; however, long-term efficacy is unknown. The aim of this study was to assess the relapse rate after discontinuation of infliximab in sarcoidosis patients and predict relapse by analysis of the activity marker soluble interleukin (IL)-2 receptor (sIL-2R) and maximum standardised uptake value (SUVmax) of (18)F-fluorodeoxyglucose positron emission tomography (FDG PET). In this retrospective cohort study, the proportion of relapse was analysed using the Kaplan-Meier method and predicting factors were studied using Cox regression.

Role of mast cells in mucosal diseases: current concepts and strategies for treatment.

Mast cells are well known for their role in type I hypersensitivity. However, their role in the immune system as well as their pathophysiological role in other diseases is underacknowledged. The role of mast cells in inflammatory bowel disease, allergic contact dermatitis and asthma is illustrated in this review.