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Departments of 1 Pathology and 2 Neurology, Brigham and Women's Hospital and 3 Department of Pediatric Oncology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, Massachusetts; and 4 Neuroscience Research Institute, University of California Santa Barbara, Santa Barbara, California
Requests for reprints: Anna M. Krichevsky, Neurology, Brigham and Women's Hospital, Harvard Medical School, 4 Blackfan Circle HIM 760, Boston, MA 02115. Phone: 617-525-5195; Fax: 617-525-5305; E-mail: krichevsky{at}cnd.bwh.harvard.edu.
MicroRNAs (miRNAs) are small noncoding RNA molecules that regulate protein expression by targeting the mRNA of protein-coding genes for either cleavage or repression of translation. The roles of miRNAs in lineage determination and proliferation as well as the location of several miRNA genes at sites of translocation breakpoints or deletions has led to the speculation that miRNAs could be important factors in the development or maintenance of the neoplastic state. Here we show that the highly malignant human brain tumor, glioblastoma, strongly overexpresses a specific miRNA, miR-21. Our studies show markedly elevated miR-21 levels in human glioblastoma tumor tissues, early-passage glioblastoma cultures, and in six established glioblastoma cell lines (A172, U87, U373, LN229, LN428, and LN308) compared with nonneoplastic fetal and adult brain tissues and compared with cultured nonneoplastic glial cells. Knockdown of miR-21 in cultured glioblastoma cells triggers activation of caspases and leads to increased apoptotic cell death. Our data suggest that aberrantly expressed miR-21 may contribute to the malignant phenotype by blocking expression of critical apoptosis-related genes.
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D. Y. Lee, Z. Deng, C.-H. Wang, and B. B. Yang MicroRNA-378 promotes cell survival, tumor growth, and angiogenesis by targeting SuFu and Fus-1 expression PNAS, December 18, 2007; 104(51): 20350 - 20355. [Abstract] [Full Text] [PDF] |
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J. S. Satterlee, S. Barbee, P. Jin, A. Krichevsky, S. Salama, G. Schratt, and D.-Y. Wu Noncoding RNAs in the Brain J. Neurosci., October 31, 2007; 27(44): 11856 - 11859. [Abstract] [Full Text] [PDF] |
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W. Zhang, J. E. Dahlberg, and W. Tam MicroRNAs in Tumorigenesis: A Primer Am. J. Pathol., September 1, 2007; 171(3): 728 - 738. [Abstract] [Full Text] [PDF] |
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D. Loffler, K. Brocke-Heidrich, G. Pfeifer, C. Stocsits, J. Hackermuller, A. K. Kretzschmar, R. Burger, M. Gramatzki, C. Blumert, K. Bauer, et al. Interleukin-6 dependent survival of multiple myeloma cells involves the Stat3-mediated induction of microRNA-21 through a highly conserved enhancer Blood, August 15, 2007; 110(4): 1330 - 1333. [Abstract] [Full Text] [PDF] |
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S. Galardi, N. Mercatelli, E. Giorda, S. Massalini, G. V. Frajese, S. A. Ciafre, and M. G. Farace miR-221 and miR-222 Expression Affects the Proliferation Potential of Human Prostate Carcinoma Cell Lines by Targeting p27Kip1 J. Biol. Chem., August 10, 2007; 282(32): 23716 - 23724. [Abstract] [Full Text] [PDF] |
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P. Sathyan, H. B. Golden, and R. C. Miranda Competing Interactions between Micro-RNAs Determine Neural Progenitor Survival and Proliferation after Ethanol Exposure: Evidence from an Ex Vivo Model of the Fetal Cerebral Cortical Neuroepithelium J. Neurosci., August 8, 2007; 27(32): 8546 - 8557. [Abstract] [Full Text] [PDF] |
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T. Thum, P. Galuppo, C. Wolf, J. Fiedler, S. Kneitz, L. W. van Laake, P. A. Doevendans, C. L. Mummery, J. Borlak, A. Haverich, et al. MicroRNAs in the Human Heart: A Clue to Fetal Gene Reprogramming in Heart Failure Circulation, July 17, 2007; 116(3): 258 - 267. [Abstract] [Full Text] [PDF] |
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M. F. Mehler and J. S. Mattick Noncoding RNAs and RNA Editing in Brain Development, Functional Diversification, and Neurological Disease Physiol Rev, July 1, 2007; 87(3): 799 - 823. [Abstract] [Full Text] [PDF] |
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W.-O. Lui, N. Pourmand, B. K. Patterson, and A. Fire Patterns of Known and Novel Small RNAs in Human Cervical Cancer Cancer Res., July 1, 2007; 67(13): 6031 - 6043. [Abstract] [Full Text] [PDF] |
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K. P. Porkka, M. J. Pfeiffer, K. K. Waltering, R. L. Vessella, T. L.J. Tammela, and T. Visakorpi MicroRNA Expression Profiling in Prostate Cancer Cancer Res., July 1, 2007; 67(13): 6130 - 6135. [Abstract] [Full Text] [PDF] |
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R. Ji, Y. Cheng, J. Yue, J. Yang, X. Liu, H. Chen, D. B. Dean, and C. Zhang MicroRNA Expression Signature and Antisense-Mediated Depletion Reveal an Essential Role of MicroRNA in Vascular Neointimal Lesion Formation Circ. Res., June 8, 2007; 100(11): 1579 - 1588. [Abstract] [Full Text] [PDF] |
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M. Negrini, M. Ferracin, S. Sabbioni, and C. M. Croce MicroRNAs in human cancer: from research to therapy J. Cell Sci., June 1, 2007; 120(11): 1833 - 1840. [Abstract] [Full Text] [PDF] |
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Y. Cheng, R. Ji, J. Yue, J. Yang, X. Liu, H. Chen, D. B. Dean, and C. Zhang MicroRNAs Are Aberrantly Expressed in Hypertrophic Heart: Do They Play a Role in Cardiac Hypertrophy? Am. J. Pathol., June 1, 2007; 170(6): 1831 - 1840. [Abstract] [Full Text] [PDF] |
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S. Zhu, M.-L. Si, H. Wu, and Y.-Y. Mo MicroRNA-21 Targets the Tumor Suppressor Gene Tropomyosin 1 (TPM1) J. Biol. Chem., May 11, 2007; 282(19): 14328 - 14336. [Abstract] [Full Text] [PDF] |
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M. Bloomston, W. L. Frankel, F. Petrocca, S. Volinia, H. Alder, J. P. Hagan, C.-G. Liu, D. Bhatt, C. Taccioli, and C. M. Croce MicroRNA Expression Patterns to Differentiate Pancreatic Adenocarcinoma From Normal Pancreas and Chronic Pancreatitis JAMA, May 2, 2007; 297(17): 1901 - 1908. [Abstract] [Full Text] [PDF] |
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F. Meng, R. Henson, H. Wehbe-Janek, H. Smith, Y. Ueno, and T. Patel The MicroRNA let-7a Modulates Interleukin-6-dependent STAT-3 Survival Signaling in Malignant Human Cholangiocytes J. Biol. Chem., March 16, 2007; 282(11): 8256 - 8264. [Abstract] [Full Text] [PDF] |
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A. Gaur, D. A. Jewell, Y. Liang, D. Ridzon, J. H. Moore, C. Chen, V. R. Ambros, and M. A. Israel Characterization of MicroRNA Expression Levels and Their Biological Correlates in Human Cancer Cell Lines Cancer Res., March 15, 2007; 67(6): 2456 - 2468. [Abstract] [Full Text] [PDF] |
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L. L. Coutinho, L. K. Matukumalli, T. S. Sonstegard, C. P. Van Tassell, L. C. Gasbarre, A. V. Capuco, and T. P. L. Smith Discovery and profiling of bovine microRNAs from immune-related and embryonic tissues Physiol Genomics, March 14, 2007; 29(1): 35 - 43. [Abstract] [Full Text] [PDF] |
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D. Sayed, C. Hong, I.-Y. Chen, J. Lypowy, and M. Abdellatif MicroRNAs Play an Essential Role in the Development of Cardiac Hypertrophy Circ. Res., February 16, 2007; 100(3): 416 - 424. [Abstract] [Full Text] [PDF] |