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Journal of Thyroid Research
Volume 2011, Article ID 407123, 12 pages
Review Article

MicroRNA Role in Thyroid Cancer Development

Unit of Metabolic Bone Diseases, Department of Internal Medicine, University of Florence, Viale Pieraccini 6, 50139 Florence, Italy

Received 1 December 2010; Accepted 3 March 2011

Academic Editor: Daniel Christophe

Copyright © 2011 Francesca Marini et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


MicroRNAs (miRNAs) are endogenous noncoding RNAs that negatively regulate gene expression by binding the 3 noncoding region of the messenger RNA targets inducing their cleavage or blocking the protein translation. They play important roles in multiple biological and metabolic processes, including developmental timing, signal transduction, and cell maintenance and differentiation. Their deregulation can predispose to diseases and cancer. miRNA expression has been demonstrated to be deregulated in many types of human tumors, including thyroid cancers, and could be responsible for tumor initiation and progression. In this paper we reviewed the available data on miRNA deregulation in different thyroid tumors and describe the putative role of miRNA in thyroid cancer development.