Chronic stimulation drives human NK cell dysfunction and epigenetic reprograming

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Abstract

A population of NK cells expressing the activating receptor NKG2C and the maturation marker CD57 expands in response to human CMV (HCMV) infection. CD3-CD56dimCD57+NKG2C+ NK cells are similar to CD8+ memory T cells with rapid and robust effector function upon restimulation, persistence, and epigenetic remodeling of the IFNG locus. Chronic antigen stimulation drives CD8+ memory T cell proliferation, while also inducing genome-wide epigenetic reprograming and dysfunction. We hypothesized that chronic stimulation could similarly induce epigenetic reprograming and dysfunction in NK cells. Here, we show that chronic stimulation of adaptive NK cells through NKG2C using plate-bound agonistic Abs in combination with IL-15 drove robust proliferation and activation of CD3-CD56dimCD57+NKG2C+ NK cells, while simultaneously inducing high expression of the checkpoint inhibitory receptors LAG-3 and PD-1. Marked induction of checkpoint inhibitory receptors was also observed on the surface of adaptive NK cells cocultured with HCMV-infected endothelial cells. Chronically stimulated adaptive NK cells were dysfunctional when challenged with tumor targets. These cells exhibited a pattern of epigenetic reprograming, with genome-wide alterations in DNA methylation. We believe our study has important implications for cancer immunotherapy and propose that exhausted NK cells could be targeted with inhibitory checkpoint receptor blockade.

Original languageEnglish (US)
Pages (from-to)3770-3785
Number of pages16
JournalJournal of Clinical Investigation
Volume129
Issue number9
DOIs
StatePublished - Sep 3 2019

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Epigenomics
Natural Killer Cells
NK Cell Lectin-Like Receptor Subfamily C
Genome
T-Lymphocytes
Interleukin-15
DNA Methylation
Immunotherapy
Neoplasms
Endothelial Cells
Cell Proliferation
Antigens
Infection
Population

PubMed: MeSH publication types

  • Journal Article

Cite this

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title = "Chronic stimulation drives human NK cell dysfunction and epigenetic reprograming",
abstract = "A population of NK cells expressing the activating receptor NKG2C and the maturation marker CD57 expands in response to human CMV (HCMV) infection. CD3-CD56dimCD57+NKG2C+ NK cells are similar to CD8+ memory T cells with rapid and robust effector function upon restimulation, persistence, and epigenetic remodeling of the IFNG locus. Chronic antigen stimulation drives CD8+ memory T cell proliferation, while also inducing genome-wide epigenetic reprograming and dysfunction. We hypothesized that chronic stimulation could similarly induce epigenetic reprograming and dysfunction in NK cells. Here, we show that chronic stimulation of adaptive NK cells through NKG2C using plate-bound agonistic Abs in combination with IL-15 drove robust proliferation and activation of CD3-CD56dimCD57+NKG2C+ NK cells, while simultaneously inducing high expression of the checkpoint inhibitory receptors LAG-3 and PD-1. Marked induction of checkpoint inhibitory receptors was also observed on the surface of adaptive NK cells cocultured with HCMV-infected endothelial cells. Chronically stimulated adaptive NK cells were dysfunctional when challenged with tumor targets. These cells exhibited a pattern of epigenetic reprograming, with genome-wide alterations in DNA methylation. We believe our study has important implications for cancer immunotherapy and propose that exhausted NK cells could be targeted with inhibitory checkpoint receptor blockade.",
author = "Aimee Merino and Bin Zhang and Philip Dougherty and Xianghua Luo and Jinhua Wang and Blazar, {Bruce R.} and Miller, {Jeffrey S.} and Frank Cichocki",
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AU - Merino, Aimee

AU - Zhang, Bin

AU - Dougherty, Philip

AU - Luo, Xianghua

AU - Wang, Jinhua

AU - Blazar, Bruce R.

AU - Miller, Jeffrey S.

AU - Cichocki, Frank

PY - 2019/9/3

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