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Oncomirs : microRNAs with a role in cancer

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TLDR
I MicroRNAs (miRNAs) are an abundant class of small non-protein-coding RNAs that function as negative gene regulators as discussed by the authors, and have been shown to repress the expression of important cancer-related genes and might prove useful in the diagnosis and treatment of cancer.
Abstract
I MicroRNAs (miRNAs) are an abundant class of small non-protein-coding RNAs that function as negative gene regulators. They regulate diverse biological processes, and bioinformatic data indicates that each miRNA can control hundreds of gene targets, underscoring the potential influence of miRNAs on almost every genetic pathway. Recent evidence has shown that miRNA mutations or mis-expression correlate with various human cancers and indicates that miRNAs can function as tumour suppressors and oncogenes. miRNAs have been shown to repress the expression of important cancer-related genes and might prove useful in the diagnosis and treatment of cancer.

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MicroRNA signatures in human cancers

TL;DR: The causes of the widespread differential expression of miRNA genes in malignant compared with normal cells can be explained by the location of these genes in cancer-associated genomic regions, by epigenetic mechanisms and by alterations in the miRNA processing machinery as discussed by the authors.
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Mechanisms of post-transcriptional regulation by microRNAs: are the answers in sight?

TL;DR: This Review summarizes the current understanding of the mechanistic aspects of microRNA-induced repression of translation and discusses some of the controversies regarding different modes of micro RNA function.
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Non-coding RNAs in human disease

TL;DR: Dysregulation of these ncRNAs is being found to have relevance not only to tumorigenesis, but also to neurological, cardiovascular, developmental and other diseases, and there is great interest in therapeutic strategies to counteract these perturbations.
References
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Insertion of microRNA-125b-1 , a human homologue of lin-4 , into a rearranged immunoglobulin heavy chain gene locus in a patient with precursor B-cell acute lymphoblastic leukemia

TL;DR: Insertion of microRNA-125b-1 , a human homologue of lin-4 , into a rearranged immunoglobulin heavy chain gene locus in a patient with precursor B-cell acute lymphoblastic leukemia is described.
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Loss of heterozygosity at chromosome 13q in hepatocellular carcinoma : Identification of three independent regions

TL;DR: The rate of LOH at 13q31-32 was significantly higher in Hepatitis B-surface antigen (HBsAg)-positive patients than HBsAg-negative HCC patients, pointing to a candidate gene related to the development of HBs Ag-positive HCCs.
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A novel and consistent amplicon at 13q31 associated with alveolar rhabdomyosarcoma

TL;DR: This work substantially extended the number of alveolar rhabdomyosarcoma samples examined by comparative genomic hybridization analysis and found a novel region of amplification or gain at 13q31 that indicates that a gene or genes at 12q31 are significant in the development or progression of alvesolar r HabdomyOSarcomas.
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Gains of 13q are correlated with a poor prognosis in liposarcoma

TL;DR: All subtypes but well-differentiated liposarcomas showed gains of 13q, which were associated with a poor prognosis, and the six pleomorphic liposARcomas possessed the most frequent genomic imbalances of all liposArcoma subtypes investigated.
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