Prenatal diagnosis and genetic analysis of X-linked immunodeficiency disorders.
Pediatr Res
; 33(1 Suppl): S29-33; discussion S33-4, 1993 Jan.
Article
em En
| MEDLINE
| ID: mdl-8433872
ABSTRACT
Several congenital immunodeficiency diseases can exhibit X-linked inheritance, including agammaglobulinemia, severe combined immunodeficiency, Wiskott-Aldrich syndrome, X-linked lymphoproliferative syndrome, and X-linked hyper-IgM syndrome. To date, the gene defects causing each of these X-linked immunodeficiencies have not been identified, and the pathogenic mechanisms whereby mutations in these genes result in immunodeficiency are obscure. Although rare, all are associated with severe infections from early life and high morbidity and mortality. Regional localization of each of these gene defects on the X chromosome has made possible carrier detection and prenatal diagnosis by linkage with polymorphic X chromosome markers in pedigrees demonstrating clear X-linked recessive inheritance. However, without a positive family history, it may not be possible to distinguish clinically between X-linked and autosomal forms. As a partial solution to this problem, it has now been established that female carriers of X-linked agammaglobulinemia, X-severe combined immunodeficiency, and Wiskott-Aldrich syndrome can be identified by the pattern of X chromosome inactivation in cell lineages targeted by each gene defect. As more families are offered the opportunity to use carrier detection and prenatal diagnosis, their decisions will reflect not only their personal experience with affected children with immunodeficiency, but also the clinical advances in bone marrow transplantation and immunomodulation.
Buscar no Google
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Cromossomo X
/
Síndromes de Imunodeficiência
Tipo de estudo:
Diagnostic_studies
/
Prognostic_studies
Limite:
Female
/
Humans
/
Male
/
Pregnancy
Idioma:
En
Ano de publicação:
1993
Tipo de documento:
Article