Abstract
Uveal melanoma (UM) is the most common cancer in adult eyes. Approximately 80% of UMs harbor somatic activating mutations in GNAQ or GNA11 (encoding Gq or G11, respectively). Herein, we show in both cell culture and human tumors that cancer-associated Gq/11 mutants activate YAP, a major effector of the Hippo tumor suppressor pathway that is also regulated by G protein-coupled receptor signaling. YAP mediates the oncogenic activity of mutant Gq/11 in UM development, and the YAP inhibitor verteporfin blocks tumor growth of UM cells containing Gq/11 mutations. This study reveals an essential role of the Hippo-YAP pathway in Gq/11-induced tumorigenesis and suggests YAP as a potential drug target for UM patients carrying mutations in GNAQ or GNA11.
Copyright © 2014 Elsevier Inc. All rights reserved.
Publication types
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Research Support, N.I.H., Extramural
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Research Support, Non-U.S. Gov't
MeSH terms
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Adaptor Proteins, Signal Transducing / genetics*
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Adaptor Proteins, Signal Transducing / metabolism
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Animals
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Cell Cycle Proteins
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Cell Growth Processes / genetics
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Cell Line, Tumor
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Disease Models, Animal
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Down-Regulation
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GTP-Binding Protein alpha Subunits, Gq-G11 / genetics*
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GTP-Binding Protein alpha Subunits, Gq-G11 / metabolism
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HEK293 Cells
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Humans
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Male
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Melanoma / genetics*
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Melanoma / metabolism
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Melanoma / pathology
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Mice
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Mice, Nude
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Mice, SCID
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Mutation*
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Nuclear Proteins / genetics*
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Nuclear Proteins / metabolism
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Phosphoproteins / genetics*
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Phosphoproteins / metabolism
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Signal Transduction
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Transcription Factors / genetics*
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Transcription Factors / metabolism
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Transfection
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Uveal Neoplasms / genetics*
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Uveal Neoplasms / metabolism
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Uveal Neoplasms / pathology
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YAP-Signaling Proteins
Substances
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Adaptor Proteins, Signal Transducing
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Cell Cycle Proteins
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Nuclear Proteins
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Phosphoproteins
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Transcription Factors
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YAP-Signaling Proteins
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YY1AP1 protein, human
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Yap1 protein, mouse
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GTP-Binding Protein alpha Subunits, Gq-G11