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Valeri V, Tonon S, Vibhushan S, Gulino A, Belmonte B, Adori M, Karlsson Hedestam GB, Gautier G, Tripodo C, Blank U, Mion F, Pucillo CEM. Mast cells crosstalk with B cells in the gut and sustain IgA response in the inflamed intestine. Eur J Immunol 2020; 51:445-458. [PMID: 32920851 DOI: 10.1002/eji.202048668] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [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: 04/02/2020] [Revised: 07/20/2020] [Accepted: 09/11/2020] [Indexed: 12/11/2022]
Abstract
B lymphocytes are among the cell types whose effector functions are modulated by mast cells (MCs). The B/MC crosstalk emerged in several pathological settings, notably the colon of inflammatory bowel disease (IBD) patients is a privileged site in which MCs and IgA+ cells physically interact. Herein, by inducing conditional depletion of MCs in red MC and basophil (RMB) mice, we show that MCs control B cell distribution in the gut and IgA serum levels. Moreover, in dextran sulfate sodium (DSS)-treated RMB mice, the presence of MCs is fundamental for the enlargement of the IgA+ population in the bowel and the increase of systemic IgA production. Since both conventional B-2 and peritoneal-derived B cells populate the intestine and communicate with MCs in physiological conditions and during inflammation, we further explored this interplay through the use of co-cultures. We show that MCs finely regulate different aspects of splenic B cell biology while peritoneal B cells are unresponsive to the supporting effects provided by MCs. Interestingly, peritoneal B cells induce a pro-inflammatory skewing in MCs, characterized by increased ST2 and TNF-α expression. Altogether, this study uncovers the versatility of the B/MC liaison and highlights key aspects for the resolution of intestinal inflammation.
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Affiliation(s)
- Viviana Valeri
- Department of Medicine, University of Udine, Udine, Italy
| | - Silvia Tonon
- Department of Medicine, University of Udine, Udine, Italy
| | - Shamila Vibhushan
- Université de Paris, Centre de Recherche sur l'Inflammation, INSERM UMR1149, CNRS ERL8252, Faculté de Médecine site Bichat, Paris, France.,Université de Paris, Laboratoire d'excellence INFLAMEX, Paris, France
| | - Alessandro Gulino
- Department of Health Science, Tumor Immunology Unit, Human Pathology Section, Palermo University School of Medicine, Palermo, Italy
| | - Beatrice Belmonte
- Department of Health Science, Tumor Immunology Unit, Human Pathology Section, Palermo University School of Medicine, Palermo, Italy
| | - Monika Adori
- Department of Microbiology, Tumor and Cell Biology, Karolinska Institutet, Stockholm, Sweden
| | | | - Gregory Gautier
- Université de Paris, Centre de Recherche sur l'Inflammation, INSERM UMR1149, CNRS ERL8252, Faculté de Médecine site Bichat, Paris, France.,Université de Paris, Laboratoire d'excellence INFLAMEX, Paris, France
| | - Claudio Tripodo
- Department of Health Science, Tumor Immunology Unit, Human Pathology Section, Palermo University School of Medicine, Palermo, Italy
| | - Ulrich Blank
- Université de Paris, Centre de Recherche sur l'Inflammation, INSERM UMR1149, CNRS ERL8252, Faculté de Médecine site Bichat, Paris, France.,Université de Paris, Laboratoire d'excellence INFLAMEX, Paris, France
| | - Francesca Mion
- Department of Medicine, University of Udine, Udine, Italy
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