Characterization of Regulatory T Lymphocytes in the Synovial Fluid of Patients Affected by Rheumatoid Arthritis. — CATERLIS  

Rheumatoid Arthritis Clinical Trial

Official title: Phenotypic and Functional Characterization of Regulatory T Lymphocytes in the Synovial Fluid of Patients Affected by Rheumatoid Arthritis, a Pilot Study.

Status Terminated

Clinical Trial Summary

In rheumatoid arthritis (RA) the clinical response to anti-TNFα is related to an increase in the number or in the function of Treg lymphocytes in the peripheral blood of patients. This observation suggests the central role of Tregs in homeostasis of the immune response during RA.

In the literature the Tregs frequency and phenotype in the peripheral blood are well documented, however the analyses done on the Tregs in inflamed environment are still fragmentary or disparate.

In this project Tregs phenotype as well as expression of several transcripts will be analysed in order to better characterize the Treg cell subsets within the synovial fluid. Moreover, the local inflammatory cytokines (TNF, IL-6 and IL-1) may affect both the phenotype and the suppressive function of these Tregs and a comparison between peripheral and tissue Tregs will allow us to better understand the cause of functional loss.

Outcomes:

Primary outcome: Identification and characterization of the Tregs subpopulation present in the synovial fluid for RA patients suffering an episode of acute arthritis.

Secondary outcomes: compare the phenotypic and expression profile of the Tregs present in the synovial fluid with the Tregs present in the peripheral blood of RA patients suffering from an episode of acute arthritis.

Clinical Trial Description

Transverse observational, monocentric exploratory study based on physiopathological evaluation Phase of identification/characterization of biomarkers. In a second phase, investigators might also considered a multicentre study with a greater number of patients as well as with osteoarthritis patients in order to validate the specificity of the results obtained in RA.

Investigators will prospectively recruit 10 patients with rheumatoid arthritis suffering from an episode of acute arthritis and requiring joint puncture. Investigators will analyse the cellular component of the joint fluid. It is an interventional clinical trial since one extra blood sample of 30 ml of blood will be collected. ;

Related Conditions & MeSH terms

• Arthritis
• Arthritis, Rheumatoid
• Characterization of Regulatory T Lymphocytes
• Joint Fluid
• Rheumatoid Arthritis
• Swelling Joint

• NCT number: NCT03293667
• Study type: Interventional
• Source: University Hospital, Montpellier
• Status: Terminated
• Phase: N/A
• Start date: October 17, 2017
• Completion date: July 27, 2021