Abstract
Binding of the interleukin-2 (IL-2) to the IL-2 receptor (IL-2R) triggers a series of intracellular events culminating in lymphocyte proliferation and differentiation. We report here the identification of a novel G245R polymorphism in the membrane proximal domain of the IL-2 receptor β chain (IL-2Rβ). Present at a frequency of 7.2%, the IL-2-Rβ G245R was identified in a population of Eastern Sudan exposed to a severe outbreak of visceral leishmaniasis (VL), a disease associated with a marked depression of T-cell antigen-specific responses. The location of the G245R polymorphism next to the box1/box2 proximal cytokine receptor homology segment and suggestive genetic association with the development of disease (P=0.043), suggest that it may affect Janus kinase (JAK) association and impair growth signal transduction. However, additional genetic association with a synonymous single nucleotide polymorphism (IL2RB+8777T) suggests that other variations of IL2RB or nearby genes participate in the highly significant linkage with VL at 22q12 previously reported for this population.
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Acknowledgements
This work was supported by a Grant IC 18 CT 98 0373 (European Commission) by the French Research Ministry Programme PRFMMIP/Microbiology and by INSERM.
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Bucheton, B., Argiro, L., Chevillard, C. et al. Identification of a novel G245R polymorphism in the IL-2 receptor β membrane proximal domain associated with human visceral leishmaniasis. Genes Immun 8, 79–83 (2007). https://doi.org/10.1038/sj.gene.6364355
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DOI: https://doi.org/10.1038/sj.gene.6364355
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