Study: NCT05754112

Intervention type: OTHER
Intervention: B lymphocyte profiling
Description: 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.

Intervention type: OTHER
Intervention: B lymphocyte profiling
Description: 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.

Intervention type: OTHER
Intervention: B lymphocyte profiling
Description: 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.

Intervention type: OTHER
Intervention: B lymphocyte profiling
Description: 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.