alexa Modulation of K-Ras-dependent lung tumorigenesis by MicroRNA-21.
Immunology

Immunology

Journal of Clinical & Cellular Immunology

Author(s): Hatley ME, Patrick DM, Garcia MR, Richardson JA, BasselDuby R,

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Abstract Lung cancer is the leading cause of cancer-related deaths in the world, and non-small-cell lung cancer (NSCLC) accounts for 80\% of cases. MicroRNA-21 (miR-21) expression is increased and predicts poor survival in NSCLC. Although miR-21 function has been studied in vitro with cancer cell lines, the role of miR-21 in tumor development in vivo is unknown. We utilize transgenic mice with loss-of-function and gain-of-function miR-21 alleles combined with a model of NSCLC to determine the role of miR-21 in lung cancer. We show that overexpression of miR-21 enhances tumorigenesis and that genetic deletion of miR-21 partially protects against tumor formation. MiR-21 drives tumorigenesis through inhibition of negative regulators of the Ras/MEK/ERK pathway and inhibition of apoptosis. Copyright © 2010 Elsevier Inc. All rights reserved.
This article was published in Cancer Cell and referenced in Journal of Clinical & Cellular Immunology

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