PMID: 11920841Mar 29, 2002Paper

Novel Igalpha (CD79a) gene mutation in a Turkish patient with B cell-deficient agammaglobulinemia

American Journal of Medical Genetics
Yue WangT Miyawaki

Abstract

Mutations that impair early B cell development result in profound antibody deficiency, which is characterized by a paucity of mature B cells and the early onset of recurrent pyogenic infections. Among these inherited early B cell defects, X-linked agammaglobulinemia (XLA) with mutations in Bruton's tyrosine kinase (BTK) gene is mostly identified. Recent studies have shown that mutations in the gene for mu heavy chain (IGHM) and for other components of the pre-B cell receptor complex, including lambda5/14.1 (IGLL1) or Igalpha (CD79a), can cause a disorder that is clinically similar to XLA. In a genetic survey of XLA in Turkey, we examined possible mutations in the IGHM, IGLL1, and Igalpha genes in some male patients with presumed XLA who did not have identifiable BTK mutations. We found an eight-year-old boy with a novel homozygous mutation in the Igalpha gene (IVS2+1G>A) causing B cell defect. This is the second case of agammaglobulinemia due to an Igalpha (CD79a) deficiency in the world.

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Dec 13, 2006·Clinical & Developmental Immunology·Arvind KumarM Eric Gershwin
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