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Editorials |
Tissue Typing Laboratory, Department of Clinical Immunology, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
aAddress correspondence to this author at: Tissue Typing Laboratory-7631, Department of Clinical Immunology, Rigshospitalet, University of Copenhagen, Blegdamsvej 9, 2100 Copenhagen Ø, Denmark. E-mail: Laogpd@mobilixnet.dk.
| The first 20% of the full text of this article appears below. |
Classical primary immunodeficiencies (PIDs) are usually monogenic (Mendelian) disorders affecting host defenses. More than 200 clinical phenotypes of PID have been described, and about 100 of them now have a well-defined molecular genetic basis (1). The classical example is X-linked agammaglobulinemia, in which disease-causing variants in the gene (BTK, Bruton agammaglobulinemia tyrosine kinase) coding for Brutons tyrosine kinase lead to arrest of B-cell development at the pre-B-cell stage (2). Identification and characterization of such monogenic diseases are not only helpful for diagnosis and genetic counseling but will be valuable in development of mechanism-based therapies or gene therapy. Gene therapy has been used to insert a functional gene in hematopoietic stem cells in children with severe combined immunodeficiency, and it is hoped that this procedure will supplement or even replace allogeneic bone marrow transplantations as a treatment option in many
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