A lack of knowledge of the cellular origin of miRNAs has greatly confounded functional and biomarkers studies. Recently, three studies characterized miRNA expression patterns across >78 human cell types. These combined data expand our knowledge of miRNA expression localization and confirm that many miRNAs show cell type-specific expression patterns.

中文翻译：

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细胞MicroRNA表达大步向前

缺乏对miRNA的细胞起源的了解已大大混淆了功能和生物标记物的研究。最近，三项研究对超过78种人类细胞类型的miRNA表达模式进行了表征。这些组合的数据扩展了我们对miRNA表达定位的了解，并证实了许多miRNA显示出细胞类型特异性表达模式。