scholarly journals Human blood IgM "memory" B cells are circulating splenic marginal zone B cells harboring a prediversified immunoglobulin repertoire

Blood ◽  
2004 ◽  
Vol 104 (12) ◽  
pp. 3647-3654 ◽  
Author(s):  
S. Weller
Keyword(s):  
B Cells ◽  
Human Blood ◽  
Marginal Zone ◽  
Memory B Cells ◽  
Marginal Zone B Cells ◽  
Immunoglobulin Repertoire

scholarly journals NR4A Expression by Human Marginal Zone B-Cells

Antibodies ◽  
2019 ◽  
Vol 8 (4) ◽  
pp. 50
Author(s):  
Kim Doyon-Laliberté ◽  
Josiane Chagnon-Choquet ◽  
Michelle Byrns ◽  
Matheus Aranguren ◽  
Meriam Memmi ◽  
...  
Keyword(s):  
B Cells ◽  
B Cell ◽  
Cell Population ◽  
Human Blood ◽  
Marginal Zone ◽  
Ex Vivo ◽  
Transcriptome Profiling ◽  
Marginal Zone B Cells ◽  
Healthy Donors ◽  
And Function

We have previously characterized a human blood CD19+CD1c+IgM+CD27+CD21loCD10+ innate-like B-cell population, which presents features shared by both transitional immature and marginal zone (MZ) B-cells, named herein “precursor-like” MZ B-cells. B-cells with similar attributes have been associated with regulatory potential (Breg). In order to clarify this issue and better characterize this population, we have proceeded to RNA-Seq transcriptome profiling of mature MZ and precursor-like MZ B-cells taken from the blood of healthy donors. We report that ex vivo mature MZ and precursor-like MZ B-cells express transcripts for the immunoregulatory marker CD83 and nuclear receptors NR4A1, 2, and 3, known to be associated with T-cell regulatory (Treg) maintenance and function. Breg associated markers such as CD39 and CD73 were also expressed by both populations. We also show that human blood and tonsillar precursor-like MZ B-cells were the main B-cell population to express elevated levels of CD83 and NR4A1-3 proteins ex vivo and without stimulation. Sorted tonsillar precursor-like MZ B-cells exerted regulatory activity on autologous activated CD4+ T-cells, and this was affected by a CD83 blocking reagent. We believe these observations shed light on the Breg potential of MZ populations, and identify NR4A1-3 as potential Breg markers, which as for Tregs, may be involved in stabilization of a regulatory status. Since expression and activity of these molecules can be modulated therapeutically, our findings may be useful in strategies aiming at modulation of Breg responses.

scholarly journals Identification of Functional Human Splenic Memory B Cells by Expression of CD148 and CD27

1998 ◽  
Vol 188 (9) ◽  
pp. 1691-1703 ◽  
Author(s):  
Stuart G. Tangye ◽  
Yong-Jun Liu ◽  
Gregorio Aversa ◽  
Joseph H. Phillips ◽  
Jan E. de Vries
Keyword(s):  
B Cells ◽  
Cell Surface ◽  
Marginal Zone ◽  
Plasma Cells ◽  
Memory B Cells ◽  
White Pulp ◽  
Human Spleen ◽  
Marginal Zone B Cells ◽  
Surface Phenotype ◽  
V Region

Memory B cells isolated from human tonsils are characterized by an activated cell surface phenotype, localization to mucosal epithelium, expression of somatically mutated immunoglobulin (Ig) variable (V) region genes, and a preferential differentiation into plasma cells in vitro. In spleens of both humans and rodents, a subset of memory B cells is believed to reside in the marginal zone of the white pulp. Similar to tonsil-derived memory B cells, splenic marginal zone B cells can be distinguished from naive follicular B cells by a distinct cell surface phenotype and by the presence of somatic mutations in their Ig V region genes. Although differences exist between human naive and memory B cells, no cell surface molecules have been identified that positively identify all memory B cells. In this study, we have examined the expression of the receptor-type protein tyrosine phosphatase CD148 on human B cells. CD148+ B cells present in human spleen exhibited characteristics typical of memory B cells. These included an activated phenotype, localization to the marginal zone, the expression of somatically mutated Ig V region genes, and the preferential differentiation into plasma cells. In contrast, CD148− B cells appeared to be naive B cells due to localization to the mantle zone, the expression of surface antigens typical of unstimulated B cells, and the expression of unmutated Ig V region genes. Interestingly, CD148+ B cells also coexpressed CD27, whereas CD148− B cells were CD27−. These results identify CD148 and CD27 as markers which positively identify memory B cells present in human spleen. Thus, assessing expression of these molecules may be a convenient way to monitor the development of memory B cell responses in immunocompromised individuals or in vaccine trials.

High-Throughput Ig Sequencing of Paired Blood and Spleen Samples Allows a Redefinition of Memory IgM Subsets in Humans

Blood ◽  
2014 ◽  
Vol 124 (21) ◽  
pp. 565-565
Author(s):  
Davide Bagnara ◽  
Margherita Squillario ◽  
David Kipling ◽  
Thierry Mora ◽  
Aleksandra Walczak ◽  
...  
Keyword(s):  
B Cells ◽  
B Cell ◽  
High Throughput ◽  
Germinal Center ◽  
Marginal Zone ◽  
Cell Subset ◽  
Memory B Cells ◽  
Double Negative ◽  
Marginal Zone B Cells ◽  
B Cell Subsets

Abstract In humans, whether B cells with the IgM+IgD+CD27+ phenotype represent an independent lineage involved in T-independent responses, similar to mouse marginal zone B cells, or whether they are part of the germinal center-derived memory B-cell pool generated during responses to T-dependent antigens, is still a debated issue. To address this question, we performed high-throughput Ig sequencing of B-cell subsets from paired blood and spleen samples and analyzed the clonal relationships between them. We isolated and analyzed 3 different B cell subsets based on CD27 and IgD staining from both blood and spleen: IgD+CD27+ (MZ) - amplified with Cmu primers IgD-CD27+ (switched and IgM-only) with Cmu, Cgamma and Calpha primers IgD-CD27- (CD27- memory or double-negative DN) with the same three primers We obtained 95729 unique sequences that clustered in 49199 different clones: 1125 clones were shared between blood and spleen of the same B-cell subset, and 1681 clones were shared between different subsets, allowing us to trace their relationships. We analyzed these clones that share sequences from different subsets/tissues for their mutation frequency distribution, CDR3-length, and VH/JH family usage, and compared these different characteristics with the bulk of sequences from their respective subset of origin. The analysis of clones shared between blood and spleen for switched IgG/IgA and for MZ subsets suggests different recirculation dynamics. For switched cells, the blood appears to be a mixture of splenic and other lymphoid tissues B cells. For MZ B cells in contrast, the blood appear to be only composed of a subgroup of the splenic repertoire, in agreement with the observation that marginal zone B cells recirculate and are mainly generated in the spleen. Clonal relationships between the IgM clones (originating from the MZ, IgM-only and double negative compartments) show that the clones involved display the characteristics of IgM-only B cells whatever their subset of origin, even in the case of the paired MZ/double-negative sequences that were not supposed to include IgM-only sequences. We therefore conclude that the clones shared between the various IgM subsets do not represent b between them, but rather correspond to a heterogeneous phenotype of the IgM-only population that concerns both IgD and CD27 expression, leading to a partial overlap with the MZ and double-negative gates. Clones shared between the MZ and the switched IgG and IgA compartment also show, for their IgM part, the mutation and repertoire characteristics of IgM-only cells and not of MZ B cells, reinforcing the conclusion that IgM-only are true memory B cells, and constitute the only subset showing clonal relationships with switched memory B cells. In summary, we report that MZ B cells have different recirculation characteristics and do not show real clonal relationships with IgM-only and switched memory B cells, in agreement with the notion that they represent a distinct differentiation pathway. In contrast, the only precursor-product relationship between IgM memory and switched B cells appear to concern a B cell subset that has been described as "IgM-only", but appears to have a more heterogeneous expression of IgD than previously reported and therefore contribute to 3-15% of the MZ compartment. Searching for markers that would permit to discriminate between marginal zone and germinal center-derived IgM memory B cells is obviously required to further delineate their respective function. Disclosures No relevant conflicts of interest to declare.

scholarly journals IL-21 and IFN-α have both opposite and redundant role on human innate precursors and memory B-cell differentiation.

2021 ◽  
Author(s):  
Marina Boudigou ◽  
Magalie Michée-Cospolite ◽  
Patrice Hémon ◽  
Alexis Grasseau ◽  
Christelle Le Dantec ◽  
...  
Keyword(s):  
Cell Differentiation ◽  
B Cells ◽  
B Cell ◽  
Marginal Zone ◽  
Memory B Cells ◽  
Lymphoid Tissues ◽  
B Cell Differentiation ◽  
Functional Responses ◽  
Marginal Zone B Cells ◽  
Activated State

Immunological memory is essential for effective immune protection upon antigen rechallenge. Memory B cells encompass multiple subsets, heterogeneous in terms of phenotypes, origins and precursors, anatomical localization, and functional responses. B-cell responses are conditioned by micro-environmental signals, including cytokines. Here, we analyzed in vitro the effects of two cytokines implicated in B-cell differentiation, interferon-alpha (IFN-α) and interleukin (IL)-21, on the early functional response of four different mature B-cell subsets (IgD- CD27- naive, IgD+ CD27+ unswitched, IgD- CD27+ switched and double-negative B cells). The dual response of naive and memory B cells to IL-21 allowed us to uncover a unique IgD+ CD27- CD10- B-cell population (referred to as NARB+) characterized by the expression of marginal zone B-cell markers CD45RB and CD1c. Similar to memory B cells, NARB+ cells were in a pre-activated state, allowing them to rapidly differentiate into plasmablasts upon innate signals while maintaining their susceptibility to IL-21 activation-induced apoptosis as observed for the naive compartment. Both in-depth phenotypic analysis of circulating B cells, and identification of these cells in spleen, tonsil and gut-associated lymphoid tissues, supported that NARB+ are uncommitted precursors of human marginal zone B cells.

Ligation of tumour-produced mucins to CD22 dramatically impairs splenic marginal zone B-cells

2009 ◽  
Vol 417 (3) ◽  
pp. 673-683 ◽  
Author(s):  
Munetoyo Toda ◽  
Risa Hisano ◽  
Hajime Yurugi ◽  
Kaoru Akita ◽  
Kouji Maruyama ◽  
...  
Keyword(s):  
Sialic Acid ◽  
B Cells ◽  
B Cell ◽  
Marginal Zone ◽  
Cell Signalling ◽  
Negative Regulator ◽  
Mammary Adenocarcinoma ◽  
Marginal Zone B Cells ◽  
Tumour Bearing

CD22 [Siglec-2 (sialic acid-binding, immunoglobulin-like lectin-2)], a negative regulator of B-cell signalling, binds to α2,6- sialic acid-linked glycoconjugates, including a sialyl-Tn antigen that is one of the typical tumour-associated carbohydrate antigens expressed on various mucins. Many epithelial tumours secrete mucins into tissues and/or the bloodstream. Mouse mammary adenocarcinoma cells, TA3-Ha, produce a mucin named epiglycanin, but a subline of them, TA3-St, does not. Epiglycanin binds to CD22 and inhibits B-cell signalling in vitro. The in vivo effect of mucins in the tumour-bearing state was investigated using these cell lines. It should be noted that splenic MZ (marginal zone) B-cells were dramatically reduced in the mice bearing TA3-Ha cells but not in those bearing TA3-St cells, this being consistent with the finding that the thymus-independent response was reduced in these mice. When the mucins were administered to normal mice, a portion of them was detected in the splenic MZ associated with the MZ B-cells. Furthermore, administration of mucins to normal mice clearly reduced the splenic MZ B-cells, similar to tumour-bearing mice. These results indicate that mucins in the bloodstream interacted with CD22, which led to impairment of the splenic MZ B-cells in the tumour-bearing state.

scholarly journals Marginal zone B cells: From housekeeping function to autoimmunity?

2021 ◽  
Vol 119 ◽  
pp. 102627
Author(s):  
Anna-Karin E. Palm ◽  
Sandra Kleinau
Keyword(s):  
B Cells ◽  
Marginal Zone ◽  
Marginal Zone B Cells
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