101. Genetic and environmental determinants of human NK cell diversity revealed by mass cytometry
- Author
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Sally Mackey, Michael D. Leipold, Jessica Kubo, Neda Nemat-Gorgani, Manisha Desai, Ozge C. Dogan, Holden T. Maecker, Catherine A. Blish, Peter Parham, Gary E. Swan, Mark M. Davis, Dara M. Strauss-Albee, Cornelia L. Dekker, Paul Norman, Lisbeth A. Guethlein, and Amir Horowitz
- Subjects
Adult ,Male ,Receptor expression ,Lymphocyte ,Population ,Human leukocyte antigen ,Biology ,Environment ,Mass Spectrometry ,Interleukin 21 ,Young Adult ,medicine ,Cluster Analysis ,Humans ,Receptor ,education ,education.field_of_study ,Lymphokine-activated killer cell ,Histocompatibility Antigens Class I ,General Medicine ,Middle Aged ,Natural killer T cell ,Killer Cells, Natural ,medicine.anatomical_structure ,Phenotype ,Gene Expression Regulation ,Immunology ,Receptors, Natural Killer Cell ,Female ,Immunologic Memory - Abstract
Natural killer (NK) cells play critical roles in immune defense and reproduction, yet remain the most poorly understood major lymphocyte population. Because their activation is controlled by a variety of combinatorially expressed activating and inhibitory receptors, NK cell diversity and function are closely linked. To provide an unprecedented understanding of NK cell repertoire diversity, we used mass cytometry to simultaneously analyze 37 parameters, including 28 NK cell receptors, on peripheral blood NK cells from 5 sets of monozygotic twins and 12 unrelated donors of defined human leukocyte antigen (HLA) and killer cell immunoglobulin-like receptor (KIR) genotype. This analysis revealed a remarkable degree of NK cell diversity, with an estimated 6000 to 30,000 phenotypic populations within an individual and >100,000 phenotypes in the donor panel. Genetics largely determined inhibitory receptor expression, whereas activation receptor expression was heavily environmentally influenced. Therefore, NK cells may maintain self-tolerance through strictly regulated expression of inhibitory receptors while using adaptable expression patterns of activating and costimulatory receptors to respond to pathogens and tumors. These findings further suggest the possibility that discrete NK cell subpopulations could be harnessed for immunotherapeutic strategies in the settings of infection, reproduction, and transplantation.
- Published
- 2013