Full Citation

Title: Notch Signaling at Later Stages of NK Cell Development Enhances KIR Expression and Functional Maturation

Citation Type: Journal Article

Publication Year: 2014

ISBN:

ISSN: 0022-1767

DOI: 10.4049/jimmunol.1400534

NSFID:

PMCID:

PMID: 25172483

Abstract: The Notch signaling pathway plays a substantial role in human NK cell development. However, the role of Notch on killer Ig-like receptor (KIR) upregulation and acquisition of effector function has not been explored. To evaluate how Notch influences terminal differentiation, cord blood-derived NK cells or sorted peripheral blood NK cells were cultured with IL-15 for 7 d with inhibitory or activating Notch signals. Inhibition of Notch signaling significantly decreased KIR expression, whereas activation enhanced it. Overexpression of activated Notch on cord blood-derived NK cells resulted in a 2-fold increase in KIR expression, indicating that Notch signaling plays a direct, cell-intrinsic role in KIR regulation. Moreover, Notch-mediated KIR expression on NK cells is regulated through cis inhibition by delta-like ligand 1. Notch signaling also enhances CD16 upregulation that precedes KIR expression. Concomitant with the upregulation of KIR and CD16, Notch signaling induces increased cytolytic effector capacity and cytokine secretion, even in posttransplant samples in which NK cell function is inherently defective. Given these attributes of Notch signaling, we propose that Notch agonists may enhance NK cell maturation and tumor killing in a posttransplant setting.

Url: http://www.ncbi.nlm.nih.gov/pubmed/25172483

Url: http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=PMC4170052

Url: http://www.jimmunol.org/lookup/doi/10.4049/jimmunol.1400534

User Submitted?: No

Authors: Felices, Martin; Ankarlo, Dave E. M.; Lenvik, Todd R.; Nelson, Heather H.; Blazar, Bruce R.; Verneris, Michael R.; Miller, Jeffrey S.

Periodical (Full): The Journal of Immunology

Issue: 7

Volume: 193

Pages: 3344-3354

Countries: