A case of X-linked agammaglobulinemia diagnosed in adulthood
Copyright 2001 Academic Press.
| Veröffentlicht in: | Clinical immunology (Orlando, Fla.). - 1999. - 99(2001), 1 vom: 06. Apr., Seite 94-9 |
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| Weitere Verfasser: | , |
| Format: | Aufsatz |
| Sprache: | English |
| Veröffentlicht: |
2001
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| Zugriff auf das übergeordnete Werk: | Clinical immunology (Orlando, Fla.) |
| Schlagworte: | Case Reports Journal Article RNA, Messenger Protein-Tyrosine Kinases EC 2.7.10.1 Agammaglobulinaemia Tyrosine Kinase EC 2.7.10.2 BTK protein, human |
| Zusammenfassung: | Copyright 2001 Academic Press. X-linked agammaglobulinemia (XLA), caused by mutations in Bruton's tyrosine kinase (BTK), typically presents in early childhood. We report here the case of a male diagnosed at age 23 years with hypogammaglobulinemia, originally classified as common variable immunodeficiency (CVID). On further analysis at age 40, flow cytometric analysis of lymphocytes showed only 0.1% B cells and Western blot analysis showed a deficiency of BTK protein in peripheral blood mononuclear cells, indicating the patient has XLA. BTK cDNA and genomic DNA analysis revealed a splice site mutation at the 3' end of intron 13. Multiple abnormally spliced mRNA species were identified, one of which was predicted to produce a protein with a 24-amino-acid insertion between the SH2 and kinase domains. In vitro kinase assay of this product showed weak kinase activity, perhaps resulting in milder than usual disease. XLA can present in adult males, and sporadic cases may be misdiagnosed as CVID |
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| Beschreibung: | Date Completed 10.05.2001 Date Revised 30.11.2018 published: Print Citation Status MEDLINE |
| ISSN: | 1521-7035 |