The gene responsible for X linked agammaglobulinaemia (XLA) lies in Xq22 and has recently been identified as atk. DXS101 is a polymorphic locus which is closely linked to the disease locus. In this report we describe the identification, by pulsed field gel electrophoresis, of a new polymorphism at the DXS101 locus with a predicted heterozygosity of 4.9%. Despite this low value, we show how this...

X-linked agammaglobulinemia (XLA) is a heritable immunodeficiency disorder that is caused by a differentiation block leading to almost complete absence of B lymphocytes and plasma cells. The affected protein is a cytoplasmic protein tyrosine kinase, Bruton's agammaglobulinemia tyrosine kinase (Btk). Btk along with Tec, Itk, Bmx and Txk belong to a distinct family of protein kinases. These prote...

X-linked agammaglobulinemia (XLA), or Bruton’s agammaglobulinemia, – is a primary immunodeficiency, caused by defects in the BTK gene encoding tyrosine kinase. The lead to arrest of B-lymphocyte development and, as result, agammaglobulinemia. disease manifests with recurrent infections starting infancy. gold standard XLA treatment intravenous subcutaneous immunoglobulin substitution proved effe...

x-linked agamaglobulinemia (xla) or bruton’s disease is a genetic disease resulting from a mutation in the bruton’s tyrosine kinase (btk) gene. this mutation leads to b cell arrest during differentiation (1). this disease was first described by ogden bruton in 1952 (2). approximately 85% of the affected subjects are male (3). this disorder is inherited as an x-linked recessive trait. carrier fe...

Academic dissertation To be presented for public criticism, with the permission of Abbreviations Abstract 1 Introduction 10 1.1 Primary immunodeficiencies (PIDs) 10 1.1.1 X-linked agammaglobulinemia (XLA) 12

The gene responsible for X-linked agammaglobulinemia (XLA) has been recently identified to code for a cytoplasmic tyrosine kinase (Bruton's agammaglobulinemia tyrosine kinase, BTK), required for normal B cell development. BTK, like many other cytoplasmic tyrosine kinases, contains Src homology domains (SH2 and SH3), and catalytic kinase domain. SH3 domains are important for the targeting of sig...

BTKbase is an international database for disease-causing variants in Bruton tyrosine kinase (BTK) leading to X-linked agammaglobulinemia (XLA), a rare primary immunodeficiency of antibody production. was established 1994 as one the first publicly available variation databases. The number cases has more than doubled since last update; it now contains information 2310 DNA 2291 individuals. 1025 a...

INTRODUCTION X-Linked agammaglobulinemia (XLA) is characterized by an arrest of B cell differentiation, leading to recurrent bacterial infections. Lifelong immunoglobulin replacement therapy (IRT) is indicated to prevent infections and their complications. MATERIAL AND METHODS A retrospective study of patients with XLA followed in a level three hospital was performed; data was collected retro...

X-linked agammaglobulinemia (XLA) has been described as a disorder in which pre-B cells fail to differentiate into B cells. However, a small number of B cells have been seen occasionally in patients with this disorder. Because the phenotype of these cells might be helpful in defining the site of the defect in XLA, immunofluorescent staining techniques were used to characterize the B cells that ...

x-linked agammaglobulinemia (xla) is an immunodeficiency caused by mutations in the bruton tyrosine kinase (btk) gene. in order to identify the mutations in btk gene in iranian patients with antibody deficiency, 13 male patients with an xla phenotype from 11 unrelated families were enrolled as the subjects of investigation for btk mutation analysis using pcr-sscp followed by sequencing. five di...