单词	miRNA
释义	miRNA noun ˌem-ˌī-ˌär-(ˌ)en-ˈā  genetics : microrna A major part of this regulation is performed by microRNAs (miRNAs), small RNA molecules encoded by the genome that are not translated into proteins; rather, they control the expression of genes. Sebastien S. Hebert et al. Example Sentences Recent Examples on the Web The findings suggest that the specific serum miRNA profiles may serve as fingerprints for disease diagnosis. Chao Yan, Scientific American, 17 June 2020 In 2017, Lönnerdal and his colleagues explored this question by exposing miRNA-containing exosomes from breast milk to acidic conditions that mimic those in the infant gut and observing how the packages fared2. Tien Nguyen, Scientific American, 17 June 2020 So a single miRNA might match 20–50 mRNAs, Hicks says. Tien Nguyen, Scientific American, 17 June 2020 Word History First Known Use 2001, in the meaning defined above Medical Definition miRNA noun ˌem-ˌī-ˌär-ˌen-ˈā  : microrna MicroRNAs (miRNAs) are 20- to 22-nucleotide RNAs that regulate the function of eukaryotic messenger RNAs (mRNAs) and play important roles in development, cancer, stress responses, and viral infections. J. Ross Buchan et al., Science Many of the noncoding RNAs, epitomized by the miRNA, have regulatory functions in normal cells. The aberrant expression of miRNA promotes tumorigenesis, metastasis, and other features of cancer. Frank J. Slack et al., The New England Journal of Medicine
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