MiR-10b Downregulates the Stress-Induced Cell Surface Molecule MICB, a Critical Ligand for Cancer Cell Recognition by Natural Killer Cells

Natural killer cells (NK) are a component of innate immunity well known for their potent ability to kill virus-infected or neoplastically transformed cells following stimulation of the NK cell receptor NKG2D. One of the various ligands of NKG2D is MICB, a stress-induced ligand that has been found to...

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Veröffentlicht in:Cancer research (Chicago, Ill.) Ill.), 2012-11, Vol.72 (21), p.5463-5472
Hauptverfasser: TSUKERMAN, Pinchas, STERN-GINOSSAR, Noam, LANKRY, Dikla, MANDELBOIM, Ofer, GUR, Chamutal, GLASNER, Ariella, NACHMANI, Daphna, BAUMAN, Yoav, YAMIN, Rachel, VITENSHTEIN, Alon, STANIETSKY, Noah, BAR-MAG, Tomer
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container_end_page 5472
container_issue 21
container_start_page 5463
container_title Cancer research (Chicago, Ill.)
container_volume 72
creator TSUKERMAN, Pinchas
STERN-GINOSSAR, Noam
LANKRY, Dikla
MANDELBOIM, Ofer
GUR, Chamutal
GLASNER, Ariella
NACHMANI, Daphna
BAUMAN, Yoav
YAMIN, Rachel
VITENSHTEIN, Alon
STANIETSKY, Noah
BAR-MAG, Tomer
description Natural killer cells (NK) are a component of innate immunity well known for their potent ability to kill virus-infected or neoplastically transformed cells following stimulation of the NK cell receptor NKG2D. One of the various ligands of NKG2D is MICB, a stress-induced ligand that has been found to be upregulated on the surface of tumor cells. However, there is little knowledge about how this upregulation may occur or how it may be selected against in tumors as a mechanism of immune escape. Here, we report that the metastasis-associated microRNA (metastamir) miR-10b directly binds to the 3' untranslated region of MICB and downregulates its expression. Notably, antagonizing miR-10b action enhanced NKG2D-mediated killing of tumor cells in vitro and enhanced clearance of tumors in vivo. Conversely, overexpression of miR-10b downregulated MICB and impaired elimination of tumor cells. Together, our results define MICB as a novel immune target of miR-10b, implying a direct link between metastasis capability and immune escape from NK cells.
doi_str_mv 10.1158/0008-5472.can-11-2671
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source MEDLINE; Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals; American Association for Cancer Research
subjects Animals
Antineoplastic agents
Biological and medical sciences
Cell Line, Tumor
Down-Regulation
Gene Expression Regulation, Neoplastic - genetics
Histocompatibility Antigens Class I - biosynthesis
Histocompatibility Antigens Class I - genetics
Histocompatibility Antigens Class I - immunology
Humans
Killer Cells, Natural - immunology
Killer Cells, Natural - metabolism
Ligands
Male
Medical sciences
Mice
Mice, Inbred C57BL
MicroRNAs - immunology
MicroRNAs - metabolism
Neoplasm Invasiveness - genetics
Neoplasm Invasiveness - immunology
Neoplasms - genetics
Neoplasms - immunology
Neoplasms - metabolism
Pharmacology. Drug treatments
Real-Time Polymerase Chain Reaction
Tumor Escape - genetics
Tumor Escape - immunology
Tumors
title MiR-10b Downregulates the Stress-Induced Cell Surface Molecule MICB, a Critical Ligand for Cancer Cell Recognition by Natural Killer Cells
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