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2015 ; 6
(ä): 405
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Epigenetic Codes Programing Class Switch Recombination
#MMPMID26441954
Vaidyanathan B
; Chaudhuri J
Front Immunol
2015[]; 6
(ä): 405
PMID26441954
show ga
Class switch recombination imparts B cells with a fitness-associated adaptive
-advantage during a humoral immune response by using a precision-tailored DNA
excision and ligation process to swap the default constant region gene of the
antibody with a new one that has unique effector functions. This secondary
diversification of the antibody repertoire is a hallmark of the adaptability of B
cells when confronted with environmental and pathogenic challenges. Given that
the nucleotide sequence of genes during class switching remains unchanged
(genetic constraints), it is logical and necessary therefore, to integrate the
adaptability of B cells to an epigenetic state, which is dynamic and can be
heritably modulated before, after, or even during an antibody-dependent immune
response. Epigenetic regulation encompasses heritable changes that affect
function (phenotype) without altering the sequence information embedded in a
gene, and include histone, DNA and RNA modifications. Here, we review current
literature on how B cells use an epigenetic code language as a means to ensure
antibody plasticity in light of pathogenic insults.