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Planchais C, Rayes J, Delignat S, Pashova S, Varthaman A, Pashov A, Bayry J, Kaveri SV, Dimitrov JD, Lacroix-Desmazes S. Stimulation with FITC-labeled antigens confers B cells with regulatory properties. Cell Immunol 2020; 355:104151. [PMID: 32615414 DOI: 10.1016/j.cellimm.2020.104151] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2020] [Revised: 05/21/2020] [Accepted: 05/23/2020] [Indexed: 10/24/2022]
Abstract
B cells with regulatory properties (Bregs) were identified in human and in mice among different B-cell subsets. Their regulatory properties rely mainly on the production of anti-inflammatory cytokines, in particular IL10, IL-35 and TGFβ, and were extensively studied in mouse models of autoimmune and inflammatory diseases. However, the exact nature of the stimulatory signals conferring regulatory properties to B cells is still not clear. We serendipitously observed that fluorescein isothiocyanate (FITC) binds to a significant proportion of naïve mouse B cells. Binding of FITC to the B-cell surface implicated at least in part the B-cell receptor. It triggered IL-10 production and allowed the endocytosis of FITC-coupled antigens followed by their presentation to CD4+ T cells. In particular, B cells incubated with FITC-OVA polarized OTII T cells towards a Tr1/Th2 phenotype in vitro. Further, the adoptive transfer of B cells incubated with FITC-labeled myelin oligodendrocyte glycoprotein peptide protected mice from experimental autoimmune encephalomyelitis, a T-cell-dependent autoimmune model. Together, the data show that FITC-stimulated B cells polarize immune responses towards Tr1/Th2 and acquire immuno-modulatory properties.
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Affiliation(s)
- Cyril Planchais
- Centre de recherche des Cordeliers, INSERM, Sorbonne Université, Université de Paris, F-75006 Paris, France.
| | - Julie Rayes
- Centre de recherche des Cordeliers, INSERM, Sorbonne Université, Université de Paris, F-75006 Paris, France
| | - Sandrine Delignat
- Centre de recherche des Cordeliers, INSERM, Sorbonne Université, Université de Paris, F-75006 Paris, France
| | - Shina Pashova
- Department of Immunology, Stefan Angelov Institute of Microbiology, Bulgarian Academy of Sciences, Sofia, Bulgaria
| | | | - Anastas Pashov
- Centre de recherche des Cordeliers, INSERM, Sorbonne Université, Université de Paris, F-75006 Paris, France; Department of Immunology, Stefan Angelov Institute of Microbiology, Bulgarian Academy of Sciences, Sofia, Bulgaria
| | - Jagadeesh Bayry
- Centre de recherche des Cordeliers, INSERM, Sorbonne Université, Université de Paris, F-75006 Paris, France
| | - Srinivas V Kaveri
- Centre de recherche des Cordeliers, INSERM, Sorbonne Université, Université de Paris, F-75006 Paris, France
| | - Jordan D Dimitrov
- Centre de recherche des Cordeliers, INSERM, Sorbonne Université, Université de Paris, F-75006 Paris, France
| | - Sebastien Lacroix-Desmazes
- Centre de recherche des Cordeliers, INSERM, Sorbonne Université, Université de Paris, F-75006 Paris, France
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