Abstract
Introduction
Common variable immunodeficiency is a heterogeneous antibody deficiency syndrome with autoimmune and inflammatory complications in a significant proportion of patients. The study was designed to evaluate the role of T regulatory (Treg) cells in common variable immunodeficiency (CVID) patients with autoimmunity.
Methods
The number and frequency of Treg cells (CD4+, CD25hi, Foxp3+) were evaluated in patients and controls, and Foxp3 expression in different subgroups of CVID patients with common clinical manifestations was compared.
Results
CVID patients had significantly fewer Treg cells than controls, and low frequency of Treg cells was associated with expansion of CD21lo B cells in patients. Patients with autoimmunity had significantly reduced frequency but normal numbers of regulatory T cells, whilst patients with splenomegaly had significant reduction in frequency and number of regulatory T cells.
Conclusion
Foxp3 is useful on its own or as an adjunct to classify CVID patients although the possibility of reduction in Treg cells as a secondary phenomenon cannot be excluded.
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Acknowledgements
The authors wish to thank John Toolan and Kate Ford for their help in sample collection, June Cole for technical assistance and patients and controls from St. James’s University hospital for agreeing to take part in the study.
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Arumugakani, G., Wood, P.M.D. & Carter, C.R.D. Frequency of Treg Cells Is Reduced in CVID Patients with Autoimmunity and Splenomegaly and Is Associated with Expanded CD21lo B Lymphocytes. J Clin Immunol 30, 292–300 (2010). https://doi.org/10.1007/s10875-009-9351-3
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DOI: https://doi.org/10.1007/s10875-009-9351-3