Journal of Clinical Immunology

, Volume 12, Issue 2, pp 139–143 | Cite as

Females with a disorder phenotypically identical to X-linked agammaglobulinemia

  • Mary Ellen Conley
  • Sharon K. Sweinberg
Original Articles

Abstract

Clinical and laboratory findings in two girls with a disorder phenotypically indistinguishable from typical X-linked agammaglobulinemia (XLA) are described. To examine the possibility that subtle defects in the X chromosome might explain the findings, detailed genetic studies were performed on one of these patients. Cytogenetic studies showed a normal 46XX karyotype. Southern blot analysis of her DNA showed that she had inherited a maternal and a paternal allele at sites flanking the locus for typical XLA at Xq22, making a microdeletion or uniparental disomy unlikely. To determine whether both of her X chromosomes could function as the active X, somatic-cell hybrids that selectively retained the active X were produced from her activated T cells. A normal random pattern of X inactivation was seen. Of 21 T-cell hybrids, 3 retained both X chromosomes, 7 had one X as the active X, and 11 had the other X as the active X. We have interpreted these studies as indicating that there is an autosomal recessive disorder that is phenotypically identical to XLA.

Key words

B cells immunodeficiencies X chromosome X-linked agammaglobulinemia hypogammaglobulinemia 

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Copyright information

© Plenum Publishing Corporation 1992

Authors and Affiliations

  • Mary Ellen Conley
    • 1
  • Sharon K. Sweinberg
    • 2
  1. 1.University of Tennessee College of Medicine and St. Jude Children's Research HospitalMemphis
  2. 2.Children's Hospital of PhiladelphiaPhiladelphia

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