Activation-induced cytidine deaminase (AID) deficiency causes the autosomal recessive form of the Hyper-IgM syndrome (HIGM2).
摘要：
The activation-induced cytidine deaminase (AID) gene, specifically expressed in germinal center B cells in mice, is a member of the cytidine deaminase family. We herein report mutations in the human counterpart of AID in patients with the autosomal recessive form of hyper-IgM syndrome (HIGM2). Three major abnormalities characterize AID deficiency: (1) the absence of immunoglobulin class switch recombination, (2) the lack of immunoglobulin somatic hypermutations, and (3) lymph node hyperplasia caused by the presence of giant germinal centers. The phenotype observed in HIGM2 patients (and in AID−/− mice) demonstrates the absolute requirement for AID in several crucial steps of B cell terminal differentiation necessary for efficient antibody responses.
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关键词：
Humans Germinal Center Lymph Nodes B-Lymphocytes Chromosomes, Human, Pair 12 Immunologic Deficiency Syndromes Hyperplasia Immunoglobulin M Cytidine Deaminase Cloning, Molecular
DOI：
10.1016/S0092-8674(00)00079-9
被引量：
年份：
2000
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