MicroRNA: a new tool for biomedical risk assessment and target identification in human uterine leiomyomas
Jian-Jun Wei1, Patricia Soteropoulos
1Department of Pathology, Northwestern University, Chicago, Illinois 60611, USA. jianjun-wei@northwestern.edu
Seminars in Reproductive Medicine
|October 28, 2008
Abstract:
MicroRNA (miRNA) expression is tissue specific or cell-type specific. miRNA signatures are useful tools for tumor classification and target gene identification. We and others found that uterine leiomyomas (ULMs) expressed a distinct miRNA signature. In addition, miRNA expression appears to be strongly associated with race and other biomedical factors, such as tumor sizes. Among the most highly dysregulated miRNAs, let-7 miRNAs seem to play a critical role in tumorigenesis of ULMs through negative regulation of some key target oncogenes, including high mobility group 2.
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MicroRNAs
MicroRNA (miRNA) are short, regulatory RNA transcribed from introns (non-coding regions of a gene) or intergenic regions (stretches of DNA present between genes). Several processing steps are required to form biologically active, mature miRNA. The initial transcript, called primary miRNA (pri-mRNA), base-pairs with itself, forming a stem-loop structure. Within the nucleus, an endonuclease enzyme, called Drosha, shortens the stem-loop structure into hairpin-shaped pre-miRNA. After the pre-miRNA...
MicroRNAs
MicroRNA (miRNA) are short, regulatory RNA transcribed from introns—non-coding regions of a gene—or intergenic regions—stretches of DNA present between genes. Several processing steps are required to form biologically active, mature miRNA. The initial transcript, called primary miRNA (pri-mRNA), base-pairs with itself forming a stem-loop structure. Within the nucleus, an endonuclease enzyme, called Drosha, shortens the stem-loop structure into hairpin-shaped pre-miRNA. After the pre-miRNA ends...


