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Cited by 465

The DOI matches its Crossref record; 62 of the 62 references it cites were found in a registry or an index.

Identification of a subset of human natural killer cells expressing high levels of programmed death 1: A phenotypic and functional characterization

Open access
Pesce, Silvia, Greppi, Marco, Tabellini, Giovanna, Rampinelli, Fabio, Parolini, Silvia, Olive, Daniel, Moretta, Lorenzo, Moretta, Alessandro, Marcenaro, Emanuela·2017·Journal of Allergy and Clinical Immunology
DOI 10.1016/j.jaci.2016.04.025
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Abstract

Background: Programmed death 1 (PD‐1) is an immunologic checkpoint that limits immune responses by delivering potent inhibitory signals to T cells on interaction with specific ligands expressed on tumor/virus‐infected cells, thus contributing to immune escape mechanisms. Therapeutic PD‐1 blockade has been shown to mediate tumor eradication with impressive clinical results. Little is known about the expression/function of PD‐1 on human natural killer (NK) cells. Objective: We sought to clarify whether human NK cells can express PD‐1 and analyze their phenotypic/functional features. Methods: We performed multiparametric cytofluorimetric analysis of PD‐1+ NK cells and their functional characterization using degranulation, cytokine production, and proliferation assays. Results: We provide unequivocal evidence that PD‐1 is highly expressed (PD‐1bright) on an NK cell subset detectable in the peripheral blood of approximately one fourth of healthy subjects. These donors are always serologically positive for human cytomegalovirus. PD‐1 is expressed by CD56dim but not CD56bright NK cells and is confined to fully mature NK cells characterized by the NKG2A−KIR+CD57+ phenotype. Proportions of PD‐1bright NK cells were higher in the ascites of a cohort of patients with ovarian carcinoma, suggesting their possible induction/expansion in tumor environments. Functional analysis revealed a reduced proliferative capability in response to cytokines, low degranulation, and impaired cytokine production on interaction with tumor targets. Conclusions: We have identified and characterized a novel subpopulation of human NK cells expressing high levels of PD‐1. These cells have the phenotypic characteristics of fully mature NK cells and are increased in patients with ovarian carcinoma. They display low proliferative responses and impaired antitumor activity that can be partially restored by antibody‐mediated disruption of PD‐1/programmed death ligand interaction.

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Metadata

Authors
Pesce, S., Greppi, M., Tabellini, G., Rampinelli, F., Parolini, S., Olive, D., Moretta, L., Moretta, A., & Marcenaro, E.
Venue
Journal of Allergy and Clinical Immunology
Publisher
Elsevier BV
Published
2017-01
Volume
139
Issue
1
Pages
335-346.e3
ISSN
0091-6749 (ISSN-L)
DOI
10.1016/j.jaci.2016.04.025
OpenAlex
W2397739282
Cited by
465
References
62
FWCI
24.06
Type
journal article
Language
en
Open access
bronze

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Pesce, S., Greppi, M., Tabellini, G., Rampinelli, F., Parolini, S., Olive, D., Moretta, L., Moretta, A., & Marcenaro, E. (2017). Identification of a subset of human natural killer cells expressing high levels of programmed death 1: A phenotypic and functional characterization. Journal of Allergy and Clinical Immunology. https://doi.org/10.1016/j.jaci.2016.04.025

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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

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