alexa Ligands for the murine NKG2D receptor: expression by tumor cells and activation of NK cells and macrophages.
Bioinformatics & Systems Biology

Bioinformatics & Systems Biology

Journal of Health & Medical Informatics

Author(s): Diefenbach A, Jamieson AM, Liu SD, Shastri N, Raulet DH

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Abstract Natural killer (NK) cells attack tumor and infected cells, but the receptors and ligands that stimulate them are poorly understood. Here we report the expression cloning of two murine ligands for the lectin-like receptor NKG2D. The two ligands, H-60 and Rae1 beta, are distant relatives of major histocompatibility complex class I molecules. NKG2D ligands are not expressed by most normal cells but are up-regulated on numerous tumor cells. We show that mouse NKG2D is expressed by NK cells, activated CD8+ T cells and activated macrophages. Expression of either NKG2D ligand by target cells triggers NK cell cytotoxicity and interferon-gamma secretion by NK cells, as well as nitric oxide release and tumor necrosis factor alpha transcription by macrophages. Thus, through their interaction with NKG2D, H-60 and Rae1 beta are newly identified potent stimulators of innate immunity. This article was published in Nat Immunol and referenced in Journal of Health & Medical Informatics

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