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Manipulation of the Glycan-Specific Natural Antibody Repertoire for Immunotherapy #MMPMID26864103
New JS; King RG; Kearney JF
Immunol Rev 2016[Mar]; 270 (1): 32-50 PMID26864103show ga
Natural immunoglobulin derived from innate-like B lymphocytes plays important roles in the suppression of inflammatory responses and represents a promising therapeutic target in a growing number of allergic and autoimmune diseases. These antibodies are commonly autoreactive and incorporate evolutionarily conserved specificities, including certain glycan-specific antibodies. Despite this conservation, exposure to bacterial polysaccharides during innate-like B lymphocyte development, through either natural exposure or immunization, induces significant changes in clonal representation within the glycan-reactive B cell pool. Glycan-reactive natural antibodies have been reported to play protective and pathogenic roles in autoimmune and inflammatory diseases. An understanding of the composition and functions of a healthy glycan-reactive natural antibody repertoire is therefore paramount. A more thorough understanding of natural antibody repertoire development holds promise for the design of both biological diagnostics and therapies. In this article we review the development and functions of natural antibodies and examine three glycan specificities, represented in the innate-like B cell pool, to illustrate the complex roles environmental antigens play in natural antibody repertoire development. We also discuss the implications of increased clonal plasticity of the innate-like B cell repertoire during neonatal and perinatal periods, and the prospect of targeting B cell development with interventional therapies and correct defects in this important arm of the adaptive immune system.