Department of Medicine, Division of Infectious Diseases and Immunology
Immunology of Infectious Disease | Immunopathology | Virus Diseases
Killer immunoglobulin-like receptors (KIRs) interact with human leucocyte antigen (HLA) class I ligands and play a key role in the regulation and activation of NK cells. The functional importance of KIR-HLA interactions has been demonstrated for a number of chronic viral infections, but to date only a few studies have been performed in the context of acute self-limited viral infections. During our investigation of CD8(+) T cell responses to a conserved HLA-B57-restricted epitope derived from dengue virus (DENV) non-structural protein-1 (NS1), we observed substantial binding of the tetrameric complex to non-T/non-B lymphocytes in peripheral blood mononuclear cells (PBMC) from a long-standing clinical cohort in Thailand. We confirmed binding of the NS1 tetramer to CD56(dim) NK cells, which are known to express KIRs. Using depletion studies and KIR-transfected cell lines, we demonstrated further that the NS1 tetramer bound the inhibitory receptor KIR3DL1. Phenotypical analysis of PBMC from HLA-B57(+) subjects with acute DENV infection revealed marked activation of NS1 tetramer-binding natural killer (NK) cells around the time of defervescence in subjects with severe dengue disease. Collectively, our findings indicate that subsets of NK cells are activated relatively late in the course of acute DENV illness and reveal a possible role for specific KIR-HLA interactions in the modulation of disease outcomes.
HLA, KIR, NK, dengue, pathogenesis
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© 2015 The Authors. This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.
DOI of Published Version
Clin Exp Immunol. 2016 Mar;183(3):419-30. doi: 10.1111/cei.12722. Epub 2015 Nov 24. Link to article on publisher's site
Clinical and experimental immunology
Townsley E, O'Connor G, Cosgrove C, Woda M, Co MT, Thomas SJ, Kalayanarooj S, Yoon I, Nisalak A, Srikiatkhachorn A, Green S, Stephens HA, Gostick E, Price DA, Carrington M, Alter G, McVicar DW, Rothman AL, Mathew A. (2016). Interaction of a dengue virus NS1-derived peptide with the inhibitory receptor KIR3DL1 on natural killer cells. UMass Chan Medical School Faculty Publications. https://doi.org/10.1111/cei.12722. Retrieved from https://escholarship.umassmed.edu/faculty_pubs/901
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This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License.