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JAK-i on RA B-lymphocytes Tolerance and Disease Resolution Through JAK Signaling In Rheumatoid Arthritis

NCT05754112 · Status: UNKNOWN · Type: OBSERVATIONAL · Enrollment: 50

Last updated 2023-03-03

No results posted yet for this study

Summary

The study will reveal the transcriptomic signature linked to the aberrant activation of B lymphocytes in RA identifying novel molecular potential targets for inflammation resolution and immune tolerance promotion. The combination with B lymphocytes phenotyping will dissect the impact of the identified genes on B lymphocyte maturation and activation in RA. Moreover, in vitro study on B lymphocyte cultures using selective JAK1 inhibition will reveal, at deeper level, its transcriptomic effect on RA B lymphocytes activation profile and phenotype, providing the discovery of new biomarkers of the loss of immunological tolerance, active disease and long lasting disease remission.

Conditions

Interventions

OTHER

B lymphocyte profiling

All individuals will undergo peripheral venous blood sampling and ultrasound-guided synovial tissue biopsy following a standardized procedure. B-lymphocytes will be sorted from PBMCs isolated by Ficoll gradient method using magnetic CD19-microbeads whereas tissue B-lymphocytes will be isolated from synovial tissue biopsies digested with Liberase. CD19 positive cells from PBMC will be incubated with pro-inflammatory molecules in presence or absence of Ubadacitinib. After stimulation, CD19 positive cells will be collected and processed for single cell RNA sequencing. Moreover, the impact of JAK-1 selective inhibition on B-lymphocyte cultures stimulation will be tested using ELISA method for the assessment of cytokines/chemokines production. Synovial tissue and synovial tissue B-lymphocyte subpopulations will be assessed through FACS analysis using IgD/CD27 classification. Finally, we will compare the transcriptomic profile of synovial tissue B lymphocytes from 5 subject groups.

Sponsors & Collaborators

  • Fondazione Policlinico Universitario Agostino Gemelli IRCCS

    lead OTHER

Eligibility

Min Age
18 Years
Max Age
70 Years
Sex
ALL
Healthy Volunteers
Yes

Timeline & Regulatory

Start
2021-07-29
Primary Completion
2023-05-02
Completion
2023-12-31

Countries

  • Italy

Study Locations

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Entities

Diseases

Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT05754112 on ClinicalTrials.gov