The role of toll-like receptors in B-cell development and immunopathogenesis of common variable immunodeficiency
- PMID: 26654573
- DOI: 10.1586/1744666X.2016.1114885
The role of toll-like receptors in B-cell development and immunopathogenesis of common variable immunodeficiency
Abstract
Common variable immunodeficiency (CVID) is the most frequent symptomatic primary immune deficiency and is characterized by hypogammaglobulinemia, defect in specific antibody response and increased susceptibility to recurrent infections, malignancy and autoimmunity. Patients with CVID often have defects in post-antigenic B-cell differentiation, with fewer memory B cells and impaired isotype switching. Toll-like receptors (TLRs) are expressed on various immune cells as key elements of innate and adaptive immunity. TLR signaling in B cells plays multiple roles in cell differentiation and activation, class-switch recombination and cytokine and antibody production. Moreover, recent studies have shown functional alteration of TLRs responses in CVID patients including poor cell proliferation, impaired upregulation of co-stimulatory molecules and failure in cytokine and immunoglobulin production. The purpose of the present review is to discuss the role of TLRs in B-cell development and function as well as their role in the immunopathogenesis of CVID.
Keywords: B cell; Common variable immunodeficiency; Toll-like receptor; hypogammaglobulinemia; isotype switching.
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