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MicroRNAs in embryonic stem cell function and fate Tiscornia G; Izpisua Belmonte JCGenes Dev 2010[Dec]; 24 (24): 2732-41Since their discovery in the early 1990s, microRNAs (miRs) have gone from initially being considered an oddity to being recognized as a level of gene expression regulation that is integral to the normal function of cells and organisms. They are implicated in many if not all biological processes in animals, from apoptosis and cell signaling to organogenesis and development. Our understanding of cell regulatory states, as determined primarily by transcription factor (TF) profiles, is incomplete without consideration of the corresponding miR profile. The miR complement of a cell provides robust and redundant control over the output of hundreds of possible targets for each miR. miRs are common components of regulatory pathways, and in some cases can constitute on-off switches that regulate crucial fate decisions. In this review, we summarize our current knowledge about the biogenesis and regulation of miRs and describe their involvement in the pathways that regulate cell division, pluripotency, and reprogramming to the pluripotent state.|Animals[MESH]|Embryonic Stem Cells/*cytology[MESH]|Gene Expression Regulation[MESH]|Humans[MESH]|MicroRNAs/*physiology[MESH]|Pluripotent Stem Cells[MESH]|Signal Transduction[MESH] |
