Cell
Volume 73, Issue 1, 9 April 1993, Pages 147-157
Journal home page for Cell

Article
Interleukin-2 receptor γ chain mutation results in X-linked severe combined immunodeficiency in humans

https://doi.org/10.1016/0092-8674(93)90167-OGet rights and content

Abstract

The interieukin-2 (IL-2) receptor γ chain (IL-2Rγ) is a component of high and intermediate affinity IL-2 receptors that is required to achieve full ligand binding affinity and internalization. We have localized the IL-2Rγ gene to human chromosome Xq13. Genetic linkage analysis indicates that the IL-2Rγ gene and the locus for X-linked severe combined immunodeficiency (XSCID) appear to be at the same position. Moreover, we demonstrate that each of three unrelated patients with XSCID has a different mutation in his IL-2Rγ gene resulting in a different premature stop codon and predicted C-terminal truncation. These data establish that XSCID is associated with mutations of the IL-2Rγ gene product. Since XSCID is characterized by absent or markedly reduced numbers of T cells, our findings imply that IL-2Rγ plays a vital role in thymic maturation of T cells. These results also have important implications for prenatal and postnatal diagnosis, carrier female detection, and gene therapy for XSCID.

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