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Schistosome egg antigens, including the glycoprotein IPSE/alpha-1, trigger the development of regulatory B cells
- Source :
- PLoS Pathogens, 13(7):e1006539. Public Library of Science, PLoS Pathogens 13 (2017) 7, PLoS Pathogens, Haeberlein, S, Obieglo, K, Ozir-Fazalalikhan, A, Chayé, M A M, Veninga, H, van der Vlugt, L E P M, Voskamp, A, Boon, L, den Haan, J M M, Westerhof, L B, Wilbers, R H P, Schots, A, Schramm, G, Hokke, C H & Smits, H H 2017, ' Schistosome egg antigens, including the glycoprotein IPSE/alpha-1, trigger the development of regulatory B cells ', PLoS Pathogens, vol. 13, no. 7, e1006539 . https://doi.org/10.1371/journal.ppat.1006539, PLoS Pathogens, Vol 13, Iss 7, p e1006539 (2017), PLoS Pathogens, 13(7)
- Publication Year :
- 2017
-
Abstract
- Infection with the helminth Schistosoma (S.) mansoni drives the development of interleukin (IL)-10-producing regulatory B (Breg) cells in mice and man, which have the capacity to reduce experimental allergic airway inflammation and are thus of high therapeutic interest. However, both the involved antigen and cellular mechanisms that drive Breg cell development remain to be elucidated. Therefore, we investigated whether S. mansoni soluble egg antigens (SEA) directly interact with B cells to enhance their regulatory potential, or act indirectly on B cells via SEA-modulated macrophage subsets. Intraperitoneal injections of S. mansoni eggs or SEA significantly upregulated IL-10 and CD86 expression by marginal zone B cells. Both B cells as well as macrophages of the splenic marginal zone efficiently bound SEA in vivo, but macrophages were dispensable for Breg cell induction as shown by macrophage depletion with clodronate liposomes. SEA was internalized into acidic cell compartments of B cells and induced a 3-fold increase of IL-10, which was dependent on endosomal acidification and was further enhanced by CD40 ligation. IPSE/alpha-1, one of the major antigens in SEA, was also capable of inducing IL-10 in naïve B cells, which was reproduced by tobacco plant-derived recombinant IPSE. Other major schistosomal antigens, omega-1 and kappa-5, had no effect. SEA depleted of IPSE/alpha-1 was still able to induce Breg cells indicating that SEA contains more Breg cell-inducing components. Importantly, SEA- and IPSE-induced Breg cells triggered regulatory T cell development in vitro. SEA and recombinant IPSE/alpha-1 also induced IL-10 production in human CD1d+ B cells. In conclusion, the mechanism of S. mansoni-induced Breg cell development involves a direct targeting of B cells by SEA components such as the secretory glycoprotein IPSE/alpha-1.<br />Author summary Infection with helminth parasites is known to be inversely associated with hyper-inflammatory disorders. While Schistosoma (S.) mansoni has been described to exert its down-modulatory effects on inflammation by inducing a network of regulatory immune cells such as regulatory B (Breg), the mechanisms of Breg cell induction remain unclear. Here, we use in vivo and in vitro approaches to show that antigens from S. mansoni eggs, among which the major glycoprotein IPSE/alpha-1, directly interact with splenic marginal zone B cells of mice which triggers them to produce the anti-inflammatory cytokine IL-10 and their capacity to induce regulatory T (Treg) cells. We also found that IPSE/alpha-1 induces IL-10 in human CD1d+ B cells, and that both natural and recombinant IPSE/alpha-1 are equally effective in driving murine and human Breg cells. Our study thus provides insight into the mechanisms of Breg cell induction by schistosomes, and an important step towards the development of helminth-based treatment strategies against hyper-inflammatory diseases.
- Subjects :
- 0301 basic medicine
B Cells
Schistosoma Mansoni
Physiology
Helminth genetics
Mice
White Blood Cells
Spectrum Analysis Techniques
Fluorescence Microscopy
Animal Cells
Immune Physiology
Medicine and Health Sciences
Macrophage
Biology (General)
B-Lymphocytes, Regulatory
Microscopy
Innate Immune System
biology
Light Microscopy
Helminth Proteins
Regulatory T cells
Flow Cytometry
Interleukin-10
Cell biology
medicine.anatomical_structure
Spectrophotometry
CD1D
Schistosoma
Cytokines
Female
Cytophotometry
Cellular Types
Research Article
QH301-705.5
Regulatory T cell
Immune Cells
Regulatory B cells
Immunology
Naive B cell
T cells
Research and Analysis Methods
Microbiology
03 medical and health sciences
Antigen
Helminths
Virology
Genetics
medicine
Animals
Humans
Life Science
Antibody-Producing Cells
Laboratorium voor Nematologie
Molecular Biology
Ovum
CD86
Blood Cells
Macrophages
Egg Proteins
Organisms
Biology and Life Sciences
Cell Biology
RC581-607
Molecular Development
Invertebrates
Schistosomiasis mansoni
Mice, Inbred C57BL
030104 developmental biology
Antigens, Helminth
Immune System
biology.protein
Parasitology
Immunologic diseases. Allergy
EPS
Laboratory of Nematology
Developmental Biology
Subjects
Details
- Language :
- English
- ISSN :
- 15537366
- Volume :
- 13
- Issue :
- 7
- Database :
- OpenAIRE
- Journal :
- PLoS Pathogens
- Accession number :
- edsair.doi.dedup.....b0a772baca302f65d6bb7500e5e3b636