PMID- 35084306 OWN - NLM STAT- MEDLINE DCOM- 20221108 LR - 20221108 IS - 0392-856X (Print) IS - 0392-856X (Linking) VI - 40 IP - 11 DP - 2022 Nov TI - CXCL-13 serum levels in patients with rheumatoid arthritis treated with abatacept. PG - 2103-2108 LID - 10.55563/clinexprheumatol/sk0rx7 [doi] AB - OBJECTIVES: C-X-C motif chemokine 13 (CXCL-13), which is expressed by synovial follicular dendritic cells and activated mature antigen-experienced T-helper cells, has been described as a surrogate marker of lymphoid phenotype of synovitis in rheumatoid arthritis (RA). A preferential response to anti-interleukin-6 receptor (IL-6R) as compared to anti-tumour necrosis factor alpha (TNFalpha) monotherapy has been described in patients with increased levels of CXCL-13. We hypothesised that serum levels of CXCL-13 could be used as a biomarker of response to treatment with abatacept (ABA), a T-cell co-stimulation blocker. METHODS: Serum levels of CXCL-13 and of soluble intracellular adhesion molecule 1 (sICAM-1) (a putative marker of the myeloid subtype of synovitis) were measured by indirect solid-phase enzyme immunoassays, before (T0) and after 6 months of therapy with ABA (T6) in 63 patients with RA. Circulating T follicular helper cells and B cell subpopulations were identified by flow-cytometry. RESULTS: At T0, CXCL-13 serum levels were higher in RA patients than in healthy controls (p=0.0001) and correlated with disease activity, while no difference between the two groups was observed as far as sICAM-1 levels. Serum levels of CXCL-13 levels decreased after therapy with ABA both in patients who achieved a clinical response (p<0.01) and in non-responders (p=0.01), whereas sICAM-1 levels did not significantly change. When comparing RA patients who responded to ABA with non-responders no significant difference of baseline serum levels of CXCL-13 was observed. CONCLUSIONS: CXCL-13 serum levels are raised in RA patients and decrease after therapy with ABA. We were not able to demonstrate that serum CXCL-13 levels predict the clinical response to ABA in RA patients. FAU - Masneri, Stefania AU - Masneri S AD - Rheumatology and Clinical Immunology Unit, Department of Clinical and Experimental Sciences, ASST Spedali Civili and University of Brescia, Italy. FAU - Piantoni, Silvia AU - Piantoni S AD - Rheumatology and Clinical Immunology Unit, Department of Clinical and Experimental Sciences, ASST Spedali Civili and University of Brescia, Italy. slv.piantoni@gmail.com. FAU - Galoppini, Giorgio AU - Galoppini G AD - Rheumatology and Clinical Immunology Unit, Department of Clinical and Experimental Sciences, ASST Spedali Civili and University of Brescia, Italy. FAU - Regola, Francesca AU - Regola F AD - Rheumatology and Clinical Immunology Unit, Department of Clinical and Experimental Sciences, ASST Spedali Civili and University of Brescia, Italy. FAU - Nalli, Cecilia AU - Nalli C AD - Rheumatology and Clinical Immunology Unit, Department of Clinical and Experimental Sciences, ASST Spedali Civili and University of Brescia, Italy. FAU - Bazzani, Chiara AU - Bazzani C AD - Rheumatology and Clinical Immunology Unit, Department of Clinical and Experimental Sciences, ASST Spedali Civili and University of Brescia, Italy. FAU - Franceschini, Franco AU - Franceschini F AD - Rheumatology and Clinical Immunology Unit, Department of Clinical and Experimental Sciences, ASST Spedali Civili and University of Brescia, Italy. FAU - Airo, Paolo AU - Airo P AD - Rheumatology and Clinical Immunology Unit, Department of Clinical and Experimental Sciences, ASST Spedali Civili and University of Brescia, Italy. LA - eng PT - Journal Article DEP - 20220127 PL - Italy TA - Clin Exp Rheumatol JT - Clinical and experimental rheumatology JID - 8308521 RN - 7D0YB67S97 (Abatacept) RN - 0 (Biomarkers) SB - IM MH - Humans MH - Abatacept/therapeutic use MH - *Arthritis, Rheumatoid/diagnosis/drug therapy MH - *Synovitis/pathology MH - Biomarkers MH - Flow Cytometry EDAT- 2022/01/28 06:00 MHDA- 2022/11/09 06:00 CRDT- 2022/01/27 12:14 PHST- 2021/07/22 00:00 [received] PHST- 2021/12/09 00:00 [accepted] PHST- 2022/01/28 06:00 [pubmed] PHST- 2022/11/09 06:00 [medline] PHST- 2022/01/27 12:14 [entrez] AID - 17712 [pii] AID - 10.55563/clinexprheumatol/sk0rx7 [doi] PST - ppublish SO - Clin Exp Rheumatol. 2022 Nov;40(11):2103-2108. doi: 10.55563/clinexprheumatol/sk0rx7. Epub 2022 Jan 27.