Abstract Number: L19 • ACR Convergence 2024
Efficacy and Safety of Emapalumab in Children and Adults with Macrophage Activation Syndrome (MAS) in Still’s Disease: Results from a Phase 3 Study and a Pooled Analysis of Two Prospective Trials
Background/Purpose: MAS is a life-threatening complication of Still’s disease, characterized by interferon-gamma (IFNg)-driven macrophage activation and systemic hyperinflammation. Emapalumab, an anti-IFNg antibody, binds free and…Abstract Number: 0389 • ACR Convergence 2024
Histopathological Features of Liver Tissue Biopsies in SJIA Patients with and Without Clinical Macrophage Activation Syndrome
Background/Purpose: Systemic Juvenile Idiopathic Arthritis (SJIA) can present with or without Macrophage Activation Syndrome (MAS), a severe, potentially life-threatening complication. Liver tissue injury is commonly…Abstract Number: 0829 • ACR Convergence 2024
Epstein-Barr Virus Infection Triggers Hyperinflammation and Cytokine Storm in Healthy Children
Background/Purpose: Epstein-Barr virus (EBV) is common pathogen responsible for infectious mononucleosis but also triggers hemophagocytic lymphohistiocytosis (HLH). This variation in the immune response to EBV…Abstract Number: 0834 • ACR Convergence 2024
Evolution of Lung Inflammation in a Mouse Model of Chronic/Recurrent Macrophage Activation Syndrome
Background/Purpose: Systemic juvenile idiopathic arthritis-associated lung disease (SJIA-LD) is a life-threatening complication and associated in >80% of cases with macrophage activation syndrome (MAS); however, the…Abstract Number: 1765 • ACR Convergence 2024
CD8+ T Cells and Monocytes from Children with Macrophage Activation Syndrome Demonstrate Specific Transcriptional Changes Consistent with T Cell Activation and Expansion of Monocytes Shaped by Interferon and TLR Signaling
Background/Purpose: Macrophage activation syndrome (MAS), a form of secondary hemophagocytic lymphohistiocytosis (sHLH), is a potentially fatal complication of rheumatic diseases. MAS is characterized by a…Abstract Number: 1768 • ACR Convergence 2024
A Potential Role of Longstanding IL-18 Stimulation in the Susceptibility for Macrophage Activation Syndrome in Patients with Systemic Juvenile Idiopathic Arthritis
Background/Purpose: Macrophage Activation Syndrome (MAS) is a pathologic condition of immune hyperactivation, which occurs in 10-30% of cases of Still’s Disease (SD), the spectrum of…Abstract Number: 1772 • ACR Convergence 2024
Modeling and Predicting HLH Through Measurement of Immune Synapse Duration, Cytokine Production, and Target Cell Death
Background/Purpose: Hyperinflammation is a life-threatening systemic inflammatory state most commonly associated with Hemophagocytic Lymphohistiocytosis (HLH) and Macrophage Activation Syndrome (MAS), but observed in nearly all inflammatory…Abstract Number: 1782 • ACR Convergence 2024
DOCK2 Mutations and Hyper-Inflammatory Syndromes
Background/Purpose: Cytokine storm syndromes (CSS) are frequently fatal hyper-inflammatory complications of a variety of oncologic, rheumatic, and infectious diseases. Many patients with CSS possess heterozygous…Abstract Number: 1997 • ACR Convergence 2024
Features of interleukin-1 and interleukin-6 Inhibitor (IL-1i/IL-6i) Related Severe Delayed Adverse Reactions in Subjects with or Without Reaction-risk Associated HLA-DRB1*15
Background/Purpose: A very serious drug-related adverse event is reported with inhibitors of IL-1 and IL-6 (IL-1i/IL6i). This reaction scores as drug reaction with eosinophilia and…Abstract Number: 2174 • ACR Convergence 2024
Current Treatment of Macrophage Activation Syndrome Worldwide: The METAPHOR Project, a PReS/PRINTO Real-life International Survey
Background/Purpose: Despite significant improvement in its management, macrophage activation syndrome (MAS) treatment is still not standardized, due to lack of robust evidence and differences in…Abstract Number: 2569 • ACR Convergence 2024
A Novel Hyperferritinemia Screen to Aid Differentiation of Hyperinflammatory Disorders
Background/Purpose: High ferritin is an important and sensitive biomarker for the diverse and deadly group of cytokine storm syndromes grouped together under the term hemophagocytic…Abstract Number: 0760 • ACR Convergence 2023
Treatment Patterns and Outcomes in Patients with Macrophage Activation Syndrome Secondary to Still’s Disease Treated with Emapalumab: The REAL-HLH Study
Background/Purpose: Macrophage activating syndrome (MAS) is a rare, potentially fatal complication of systemic juvenile idiopathic arthritis (sJIA) and adult-onset Still's disease (AOSD). MAS (a form…Abstract Number: 0803 • ACR Convergence 2023
IL10 Inhibits Toll-like Receptor-9-induced T Cell Receptor-mediated T Cell Activation in Macrophage Activation Syndrome
Background/Purpose: Macrophage activation syndrome (MAS) is a potentially fatal complication of systemic juvenile idiopathic arthritis (sJIA). Gene expression pathway analyses have identified altered Toll-like receptor…Abstract Number: 0865 • ACR Convergence 2023
Reactive Oxygen Species-scavenging Nanoparticles Target Macrophage Polarization for Osteoarthritis Therapy
Background/Purpose: Unbalanced M1/M2 polarization of synovial macrophages plays vital roles in the symptomatic and structural progression of osteoarthritis (OA). The accumulation of intracellular reactive oxygen…Abstract Number: 1662 • ACR Convergence 2023
Chronic Excess IL-18 Induces NK Deficiency, but Drives Hyperinflammation via CD8 T-cell Cytokine Overproduction and Selective Immunodeficiency
Background/Purpose: Systemic Juvenile Idiopathic Arthritis (SJIA) and Macrophage Activation Syndrome (MAS) are associated with highly elevated peripheral blood levels of the inflammasome-activated cytokine IL-18 and…
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