Document Detail

Circulating phenotypic B-1 cells are decreased in common variable immunodeficiency and correlate with immunoglobulin M levels.
MedLine Citation:
PMID:  23379434     Owner:  NLM     Status:  MEDLINE    
B-1 cells are innate-like lymphocytes characterized by spontaneous production of 'natural' polyspecific antibodies, often of self-specificity, and thought to be responsible for tissue homeostasis, mucosal protection, maintaining resting serum immunoglobulin (Ig)M levels and for early immunoglobulin production following infection. Although defined most clearly in mice, a human B-1 cell counterpart, defined by the phenotype CD19 or 20(+) CD27(+) CD43(+) CD69 or 70(-) , has been proposed recently, facilitating a study of their role in human humoral immunodeficiencies, such as common variable immunodeficiency (CVID). This study examined circulating B-1 cells in 27 CVID patients in comparison to age-matched controls (n = 28). Phenotypic putative B-1 cell proportions varied widely, but there was an overall 60-70% decrease in CVID (0·039 ± 0·033% of lymphocytes, mean ± standard deviation) compared with controls (0·110 ± 0·159% of lymphocytes, P = 0·0012). This decrease was, however, explained largely by concomitant loss of total CD27(+) memory B cells characteristic of CVID, although those with higher memory B cell proportions appeared to show a true decrease. No age-related effects were apparent in B-1 cell proportions. However, among CVID patients, there was a strong positive correlation between the B-1 cell proportion and serum IgM levels, a relationship that was not evident for IgA, nor was there a relationship between memory B cell proportions and serum IgM. Patients with CVID have fewer circulating putative phenotypic B-1 cells, which largely reflected the overall decrease in memory B cells. However, B-1 cell proportions correlated with resting serum IgM levels, suggesting a possible role in IgM deficiency in CVID.
K Kraljevic; S Wong; D A Fulcher
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Clinical and experimental immunology     Volume:  171     ISSN:  1365-2249     ISO Abbreviation:  Clin. Exp. Immunol.     Publication Date:  2013 Mar 
Date Detail:
Created Date:  2013-02-05     Completed Date:  2013-04-02     Revised Date:  2014-03-06    
Medline Journal Info:
Nlm Unique ID:  0057202     Medline TA:  Clin Exp Immunol     Country:  England    
Other Details:
Languages:  eng     Pagination:  278-82     Citation Subset:  IM    
Copyright Information:
© 2012 British Society for Immunology.
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MeSH Terms
Antigens, CD27 / analysis
B-Lymphocytes / cytology,  immunology
Common Variable Immunodeficiency / blood,  immunology*
Immunity, Innate
Immunoglobulin M / blood*
Immunologic Memory
Lymphocyte Count
Lymphocytes / cytology*,  immunology*
Middle Aged
Reg. No./Substance:
0/Antigens, CD27; 0/Immunoglobulin M

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