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Artigo em Inglês | IMSEAR | ID: sea-147768

RESUMO

MicroRNAs (miRNAs) are small 22-25 nucleotides long non-coding RNAs, that are conserved during evolution, and control gene expression in metazoan animals, plants, viruses, and bacteria primarily at post-transcriptional and transcriptional levels. MiRNAs ultimately regulate target gene expression by degrading the corresponding mRNA and/or inhibiting their translation. Currently, the critical functions of miRNAs have been established in regulating immune system, cell proliferation, differentiation and development, cancer and cell cycle by as yet unknown control mechanism. MiRNAs play an essential role in malignancy, and as tumour suppressors and oncogenes. Thus, discovery of new miRNAs will probably change the landscape of cancer genetics. Significantly different miRNA profiles can be assigned to various types of tumours, which could serve as phenotypic signatures for different cancers for their exploitation in cancer diagnostics, prognostics and therapeutics. If miRNA profiles can accurately predict malignancies, this technology could be exploited as a tool to surmount the diagnostic challenges. This review provides comprehensive and systematic information on miRNA biogenesis and their implications in human health.

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