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1 Comprehensive Cancer Center, Ohio State University, Columbus, Ohio; 2 Dipartimento di Medicina Sperimentale e Diagnostica, e Centro Interdipartimentale per la Ricerca sul Cancro, Università di Ferrara, Ferrara, Italy; 3 Molecular Targeting Unit, Department of Experimental Oncology, Istituto Nazionale Tumori, Milan, Italy; Departments of 4 Pathology, Anatomy and Cell Biology and 5 Surgery, Thomas Jefferson University, Philadelphia, Pennsylvania; and 6 Ce.S.I. Aging Research Center, Chieti, Italy
Requests for reprints: Carlo M. Croce, Comprehensive Cancer Center, Ohio State University, Room 445C, Wiseman Hall, 400 12th Avenue, Columbus, OH 43210. Phone: 614-292-3063; Fax: 614-292-3312; E-mail: Carlo.Croce{at}osumc.edu.
MicroRNAs (miRNAs) are a class of small noncoding RNAs that control gene expression by targeting mRNAs and triggering either translation repression or RNA degradation. Their aberrant expression may be involved in human diseases, including cancer. Indeed, miRNA aberrant expression has been previously found in human chronic lymphocytic leukemias, where miRNA signatures were associated with specific clinicobiological features. Here, we show that, compared with normal breast tissue, miRNAs are also aberrantly expressed in human breast cancer. The overall miRNA expression could clearly separate normal versus cancer tissues, with the most significantly deregulated miRNAs being mir-125b, mir-145, mir-21, and mir-155. Results were confirmed by microarray and Northern blot analyses. We could identify miRNAs whose expression was correlated with specific breast cancer biopathologic features, such as estrogen and progesterone receptor expression, tumor stage, vascular invasion, or proliferation index.
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L. Lu, D. Katsaros, I. A. Rigault de la Longrais, O. Sochirca, and H. Yu Hypermethylation of let-7a-3 in Epithelial Ovarian Cancer Is Associated with Low Insulin-like Growth Factor-II Expression and Favorable Prognosis Cancer Res., November 1, 2007; 67(21): 10117 - 10122. [Abstract] [Full Text] [PDF] |
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X. Tang, J. Gal, X. Zhuang, W. Wang, H. Zhu, and G. Tang A simple array platform for microRNA analysis and its application in mouse tissues RNA, October 1, 2007; 13(10): 1803 - 1822. [Abstract] [Full Text] [PDF] |
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