,Selective secretion of microRNA in CNS system

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EXTRACELLULAR miRNAs ARE PRESENT IN VARIOUS BODY FLUIDS MicroRNAs (miRNAs) are a diverse class of endogenous small non-coding RNAs,which posttranscriptionally regulate gene expression by interacting with their binding sites in target mRNAs.Recently,several studies have demonstrated that miRNAs are also detectable outside cells,and these miRNAs may be called extracellular miRNAs.Extracellular miRNAs are found in various body fluids,including plasma and serum (Chen et al.,2008),saliva (Park et al.,2009),amniotic fluid (Weber et al.,2010),Bronchial lavage (Molina-Pinelo et al.,2012;Weber et al.,2010),sputum (Xie et al.,2010),tears and urine (Weber et al.,2010),bile (Shigehara et al.,2011),seminal plasma (Wang et al.,2011),breast milk (Zhou et al.,2012),peritoneal fluid (Chen et al.,2012a).Finding the extracellular miRNAs extended the research field of miRNAs,and got a lot of fruitful research findings.
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