Abstract
Metastatic colonization of distant organs underpins the majority of human-cancer-related deaths, including deaths from head and neck squamous cell carcinoma (HNSCC). We report that miR-203, a miRNA that triggers differentiation in multilayered epithelia, inhibits multiple postextravasation events during HNSCC lung metastasis. Inducible reactivation of miR-203 in already established lung metastases reduces the overall metastatic burden. Using an integrated approach, we reveal that miR-203 inhibits metastasis independently of its effects on differentiation. In vivo genetic reconstitution experiments show that miR-203 inhibits lung metastasis by suppressing the prometastatic activities of three factors involved in cytoskeletal dynamics (LASP1), extracellular matrix remodeling (SPARC), and cell metabolism (NUAK1). Expression of miR-203 and its downstream effectors correlates with HNSCC overall survival outcomes, indicating the therapeutic potential of targeting this signaling axis.
Copyright © 2014 The Authors. Published by Elsevier Inc. All rights reserved.
Publication types
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Research Support, Non-U.S. Gov't
MeSH terms
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Adaptor Proteins, Signal Transducing / antagonists & inhibitors
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Animals
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Carcinoma, Squamous Cell / genetics*
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Carcinoma, Squamous Cell / metabolism
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Carcinoma, Squamous Cell / pathology*
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Cell Differentiation / genetics
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Cell Line, Tumor
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Cell Movement / genetics
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Cytoskeletal Proteins / antagonists & inhibitors
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Head and Neck Neoplasms / genetics*
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Head and Neck Neoplasms / metabolism
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Head and Neck Neoplasms / pathology*
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Heterografts
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Humans
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LIM Domain Proteins / antagonists & inhibitors
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Lung Neoplasms / genetics
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Lung Neoplasms / metabolism
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Lung Neoplasms / prevention & control*
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Lung Neoplasms / secondary*
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Mice
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MicroRNAs / genetics*
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Neoplasm Metastasis
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Osteonectin / antagonists & inhibitors
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Prognosis
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Protein Kinases
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Repressor Proteins / antagonists & inhibitors
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Signal Transduction
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Squamous Cell Carcinoma of Head and Neck
Substances
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Adaptor Proteins, Signal Transducing
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Cytoskeletal Proteins
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LASP1 protein, human
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LIM Domain Proteins
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MIRN203 microRNA, human
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MicroRNAs
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Osteonectin
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Repressor Proteins
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SPARC protein, human
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Protein Kinases
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NUAK1 protein, human