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Review
, 3 (4), 365-73

NK Cell Recognition and Killing of Melanoma Cells Is Controlled by Multiple Activating Receptor-Ligand Interactions

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Review

NK Cell Recognition and Killing of Melanoma Cells Is Controlled by Multiple Activating Receptor-Ligand Interactions

Sara Morgado et al. J Innate Immun.

Abstract

The role of natural killer (NK) cells in tumor immunosurveillance has been recently underlined. A better understanding of the receptor-ligand interactions between NK cells and solid tumor cells is essential for introducing more effective NK cell-based immunotherapy protocols into clinical practice. We previously analyzed the surface expression of ligands for NK cell-activating receptors and costimulatory molecules in a large panel of melanoma cell lines. Although the expression of ligands for NK cell-activating receptors is variable, the majority of melanoma cell lines express ligands for NKG2D and for DNAX accessory molecule-1 (DNAM-1). While the NKG2D receptor has been described as the principal entity responsible for the lysis of several melanoma cell lines, the role of natural cytotoxicity receptors (NCRs) and DNAM-1 receptors in NK cell recognition and killing of melanoma cells has been recently emphasized. Antibody-mediated masking of NKG2D, NCRs, and DNAM-1 has proven that NKG2D, NCRs, and DNAM-1 frequently cooperate in the lysis of melanoma cells. In this work, we provide an overview of recent advances in the study of melanoma cells' susceptibility to NK cell-mediated lysis and how multiple receptor-ligand interactions participate in melanoma cell elimination.

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