Role of microRNAs in Gynecological Pathology

J Gilabert-Estelles, Juan Gilabert–Estellés, Aitana Braza‐Boïls, A Braza-Boils, Luis Ramón, L A Ramon, Esther Zorio, E Zorio, P Medina, Pilar Medina, F Espana, Francisco España, A. Estellés, A Estelles
Current medicinal chemistry · 2012 · vol. 19(15) , pp. 2406–2413 · doi:10.2174/092986712800269362 · PMID:22455593 · W2147526306
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This review discusses the role of microRNAs in regulating gene expression and their involvement as biomarkers and therapeutic targets in gynecological pathologies including endometriosis, endometrial, cervical, and ovarian cancers.

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Abstract

microRNAs (miRNAs) are 21-22 nucleotide non-coding RNAs that regulate gene expression and play fundamental roles in biological processes. These small molecules bind to target mRNAs, leading to translational repression and/or mRNA degradation. Aberrant miRNA expression is associated with several human diseases such as cancer, cardiovascular disorders, inflammatory diseases and gynecological pathology. The present article reviews the role of miRNAs in four gynecological disorders that affect the ovary or the uterus, one benign and frequent disease (endometriosis) that is classified as a tumor-like lesion and three malignant gynecological diseases (endometrial, cervical and ovarian cancers). Endometriosis, defined as the presence of endometrium outside the uterus, is one of the most frequent benign gynecological diseases. Similarly to tumor metastasis, endometriotic implants require neovascularization to proliferate, invade the extracellular matrix and establish an endometriotic lesion. Despite its high prevalence and incapacitating symptoms, the exact pathogenic mechanism of endometriosis remains unsolved. A relationship between endometriosis and gynecological cancer, especially ovarian cancer, has been reported. Endometriosis is a multifactorial and polygenic disease, and emerging data provide evidence that a dysregulation of miRNA expression may be involved. miRNAs appear to be potent regulators of gene expression in endometriosis, raising the prospect of using miRNAs as biomarkers and therapeutic tools in this disease. In cancer, miRNAs have an important role as regulatory molecules, acting as oncogenes (oncomiRs) or tumor suppressors. Endometrial cancer is one of the most frequent gynecological malignancies in the developed countries. Cervical cancer, also one of the most common cancers in women, is associated with high-risk human papillomaviruses although this infection alone may not be enough to induce the malignant transformation. Ovarian cancer is the fifth leading cause of all cancer-related deaths among women. Over 80% of cases are diagnosed at an advanced stage, with a reduced five-year survival rate. Recent studies have shown that miRNAs are aberrantly expressed in different human cancer types, including endometrial, cervical and ovarian cancer, and that specific dysregulated miRNAs may act as biomarkers of patients' outcome. Recently, miRNAs have been detected in serum and plasma, and circulating miRNA expression profiles have now been associated with a range of different tumor types. Their accessibility in peripheral blood and stability given the fact that miRNAs circulate confined within exosomes, make researchers foster hope in their role as emerging biomarkers of cancer and other disorders. The development of therapies that might block the expression or mimic the functions of miRNAs could represent new therapeutic strategies for any of the aforementioned gynecological disorders.

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Condition tags

endometriosis

MeSH descriptors

Genital Diseases, Female MicroRNAs Biomarkers, Tumor Biomarkers, Tumor Biomarkers, Tumor Female Gene Expression Profiling Gene Expression Regulation, Neoplastic Genital Diseases, Female Genital Diseases, Female Genital Diseases, Female Genital Neoplasms, Female Genital Neoplasms, Female Genital Neoplasms, Female Genital Neoplasms, Female Gynecology Humans MicroRNAs MicroRNAs

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