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Infection and Immunity
Article . 2011 . Peer-reviewed
License: ASM Journals Non-Commercial TDM
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CD23b Isoform Expression in Human Schistosomiasis Identifies a Novel Subset of Activated B Cells

Authors: Daniel, Onguru; YanMei, Liang; Jennifer, Elliot; Pauline, Mwinzi; Lisa, Ganley-Leal;

CD23b Isoform Expression in Human Schistosomiasis Identifies a Novel Subset of Activated B Cells

Abstract

ABSTRACTResistance to schistosomiasis is associated with increased levels of serum parasite-specific IgE. IgE exerts its functions through its cellular receptors, FcεRI and FcεRII/CD23; however, its functional significance in humans requires further characterization. We previously reported that increased levels of CD23+B cells correlate with resistance to schistosomiasis in hyperexposed populations and sought to define their potential function and relationship with IgE. We found that CD23+B cells are a heterogeneous cell population with functional and phenotypic differences. Circulating CD23+B cells are uniquely activated in schistosomiasis and express the CD23b isoform and CXCR5, the homing receptor for lymphoid follicles. High CXCR5 expression by CD23+B cells was associated with the capacity to home to the cognate ligand CXCL13. CD23-bound IgE cross-linking increased surface expression of CXCR5, suggesting that CD23+B cells home directly into the lymphoid follicles upon antigen capture. As human schistosomiasis is an intravascular parasitic infection associated with a high antigenic burden in the blood, circulating CD23+B cells may play a role in the capture and shuttling of antigens directly to splenic follicles, highlighting a new role for circulating B cells. This function likely plays an important role in the development of protective immunity to infection with schistosomes.

Related Organizations
Keywords

Adult, Male, Receptors, CXCR5, Receptors, IgE, B-Lymphocyte Subsets, Schistosoma mansoni, Immunoglobulin E, Middle Aged, Flow Cytometry, Lymphocyte Activation, Chemokine CXCL13, Schistosomiasis mansoni, Animals, Humans, Protein Isoforms, Cells, Cultured, Spleen

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    influence
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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
7
Average
Average
Average
gold