Understanding of Rare Inflammatory Arthritis in Comparison to Classical Inflammatory Arthritis : Tissular Observations and Immune Infiltrate Characterization : the UTOPIC Project
试验速览
- 阶段
- 不适用
- 状态
- 招募中
- 入组人数
- 100
- 试验地点
- 4
- 主要终点
- characterize the inflammatory infiltrate in synovial biopsies
研究概览
简要总结
The pathophysiology of certain inflammatory arthritides remains poorly understood, particularly when associated with rare systemic autoimmune diseases such as systemic sclerosis (SSc), or when emerging in the context of immune-related adverse events from cancer immunotherapies. These immunotherapy-induced arthritides represent a new and increasingly encountered clinical entity in rheumatology. A deeper understanding of the mechanisms underlying joint inflammation in these settings is essential for identifying specific therapeutic targets, especially given the limitations of current treatment options and the risks associated with broad immunosuppressive strategies such as prolonged corticosteroid use, which may impair anti-tumor immune responses.
Synovial biopsy analysis provides a powerful tool for dissecting the cellular and molecular components of joint inflammation, including immune cell infiltration, cytokine profiles, and cell-cell interactions. Advances in high-dimensional techniques such as multiplex immunofluorescence and mass cytometry now allow for the identification and spatial localization of numerous protein markers at the subcellular level. Additionally, spatial transcriptomics offers complementary insight into gene expression profiles within the tissue microenvironment, providing a comprehensive understanding of inflammatory processes.
The investigators propose a prospective, proof-of-concept study to characterize and compare rare and emerging inflammatory arthritides-including those linked to SSc and immunotherapy-related immune toxicity-with classical inflammatory rheumatic diseases such as rheumatoid arthritis (RA), psoriatic arthritis (PsA), spondyloarthritis (SpA), polymyalgia rheumatica (PMR), and reactive arthritis. Through detailed immunological and molecular profiling, this study aims to identify disease-specific signatures and novel therapeutic targets. These findings could pave the way for precision medicine approaches and inform the development of targeted therapies in both rare and common forms of inflammatory arthritis.
研究设计
- 研究类型
- Interventional
- 分配方式
- Non Randomized
- 干预模型
- Parallel
- 主要目的
- Other
- 盲法
- None
入排标准
- 年龄范围
- 18 Years 至 —（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 否
入选标准
- •For all participants:
- •Signed consent form
- •Patients over 18 years old
- •Affiliated with a social security scheme
- •For cases:
- •Referred for arthritis or bursitis occurring in the context of a rare systemic autoimmune disease (SAID) or drug-induced toxicity.
- •Presenting at least one clinical arthritis with synovial thickening confirmed by ultrasound (grade ≥2 in B-mode) and Doppler inflammation of grade ≥1, or synovial thickening ≥B2 associated with joint effusion.
- •For bursitis: thickening ≥2mm of at least one periarticular bursa on ultrasound associated with Doppler inflammation of grade ≥1, or synovial thickening ≥2mm associated with joint effusion, with clinical evidence of inflammatory involvement.
- •*For the control group:
- •For arthritis:
- •Presenting clinical arthritis with synovial thickening confirmed by ultrasound (grade ≥2 in B-mode (B2)) and Doppler inflammation of grade ≥1, or synovial thickening ≥B2 associated with joint effusion.
- •Diagnosed, according to disease-specific classification criteria, with either rheumatoid arthritis (according to ACR/EULAR 2010 criteria), axial or peripheral spondyloarthritis (according to ASAS 2009 criteria), psoriatic arthritis (according to CASPAR criteria), or reactive arthritis based on clinician assessment.
- •For bursitis:
- •Thickening ≥2mm of at least one periarticular bursa on ultrasound associated with Doppler inflammation of grade ≥1, or synovial thickening ≥2mm associated with joint effusion.
- •Meeting the ACR/EULAR 2012 criteria for polymyalgia rheumatica.
排除标准
- •For all participants:
- •Patients under protective measures or unable to consent
- •Pregnant or breastfeeding women
- •Anticoagulant treatment: vitamin K antagonists (Coumadin, fluindione), direct oral anticoagulants (Eliquis, Pradaxa, Rivaroxaban), heparins at curative doses
- •Contraindication to local procedure: lymphedema near the joint, chronic wound at the site of the joint, joint prosthesis on the affected joint, corticosteroid infiltration less than 3 months ago at the same site
- •History of treatment with biotherapy or targeted therapy (JAK inhibitors) within the last 3 months, or within the last 6 months if treated with Rituximab
研究组 & 干预措施
Arm A
Arthritis or bursitis occurring in the context of a rare MIS or drug-induced toxicity."
干预措施: Biopsy (Procedure)
Arthritis or bursitis
干预措施: Biopsy (Procedure)
结局指标
主要结局
characterize the inflammatory infiltrate in synovial biopsies
时间窗: Day 1
Establishment of a biobank to characterize the inflammatory infiltrate in synovial biopsies from arthritis or bursitis occurring in the context of rare systemic autoimmune diseases (SAIDs) or immune-mediated drug toxicities, and to compare it with the infiltrate in the synovium of arthritis/bursitis associated with common inflammatory rheumatic conditions frequently encountered in rheumatology.
次要结局
- Study of the cytokine environment(day 1)
- comparison of the cytokine environment(day 1)
- Study of the gene expression profile of immune cells(day 1)
- comparison of the gene expression profile of immune cells(day 1)