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Clinical Significance of the HLA-E and CD94/NKG2 Interaction

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Archivum Immunologiae et Therapiae Experimentalis Aims and scope

Abstract

HLA-E belongs to the non-classical HLA (class Ib family) broadly defined by a limited polymorphism and a restricted pattern of cellular expression. So far, only two functional alleles differing at only one amino acid position (non-synonymous mutation) in the α2 heavy chain domain, where an arginine in position 107 in HLA-E*0101 is replaced by a glycine in HLA-E*0103, have been reported. The interaction between non-classical HLA-E molecule and CD94/NKG2A receptor plays a crucial role in the immunological response involving natural killer (NK) cells and cytotoxic T lymphocytes. All proteins forming CD94/NKG2 receptors are encoded by genes situated in the same cluster on chromosome 12, allowing tight control over the order of their expression. The inhibitory members of the NKG2 receptor family are available on the cell surface before activating the members to prevent autoimmune incidents during immune cells’ ontogenesis. In the present review, the potential role of this interaction in viral infection, pregnancy and transplantation of allogeneic hematopoietic stem cells (HSC) is presented and discussed. The review will also include the effect of HLA-E polymorphism on the outcome of HSC transplants in humans.

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Acknowledgments

This work was supported by the Polish Ministry of Science and Higher Education grant no. N-N402-193335.

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  1. L. Hirszfeld Institute of Immunology and Experimental Therapy, Polish Academy of Sciences, R. Weigla 12, 53-114, Wrocław, Poland

    Milena Iwaszko & Katarzyna Bogunia-Kubik

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  1. Milena Iwaszko
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  2. Katarzyna Bogunia-Kubik
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Correspondence to Katarzyna Bogunia-Kubik.

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Iwaszko, M., Bogunia-Kubik, K. Clinical Significance of the HLA-E and CD94/NKG2 Interaction. Arch. Immunol. Ther. Exp. 59, 353 (2011). https://doi.org/10.1007/s00005-011-0137-y

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