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|Type:||Artigo de periódico|
|Title:||Mutations of Bruton's tyrosine kinase gene in Brazilian patients with X-linked agammaglobulinemia|
OLIVEIRA JÚNIOR, E.B.
ROXO JÚNIOR, P.
|Abstract:||Mutations in Bruton's tyrosine kinase (BTK) gene are responsible for X-linked agammaglobulinemia (XLA), which is characterized by recurrent bacterial infections, profound hypogammaglobulinemia, and decreased numbers of mature B cells in peripheral blood. We evaluated 5 male Brazilian patients, ranging from 3 to 10 years of age, from unrelated families, whose diagnosis was based on recurrent infections, markedly reduced levels of IgM, IgG and IgA, and circulating B cell numbers <2%. BTK gene analysis was carried out using PCR-SSCP followed by sequencing. We detected three novel (Ala347fsX55, I355T, and Thr324fsX24) and two previously reported mutations (Q196X and E441X). Flow cytometry revealed a reduced expression of BTK protein in patients and a mosaic pattern of BTK expression was obtained from mothers, indicating that they were XLA carriers.|
Bruton tyrosine kinase
|Editor:||Associação Brasileira de Divulgação Científica|
|Appears in Collections:||FCM - Artigos e Materiais de Revistas Científicas|
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