MicroRNA expression regulatory machinery

The microRNA expression regulatory machinery is a network of proteins and complexes responsible for the biogenesis, processing, maturation, and functional deployment of microRNAs (miRNAs). Key steps include transcription of primary miRNAs, nuclear processing by the Drosha-DGCR8 complex, nuclear export by Exportin-5, cytoplasmic processing by Dicer, and the assembly of the RNA-induced silencing complex (RISC) containing Argonaute proteins. This machinery determines the levels and activity of miRNAs, which regulate gene expression post-transcriptionally by targeting mRNAs for degradation or translational repression. Dysregulation of this machinery has been implicated in cancer, cardiovascular diseases, inflammation, and other conditions, making its components potential therapeutic targets. However, because "miRNA expression regulatory machinery" describes a system rather than a single molecule, it is not a canonical target; instead, drug discovery typically focuses on individual core components such as Dicer, Drosha, or Argonaute.

Other names

miRNA biogenesis machinerymicroRNA processing complexmicroRNA pathwaymicroRNA machinery

Modulation of miRNA biogenesis or processing (e.g., inhibiting or activating specific steps such as processing by Drosha or Dicer); altering miRNA-mediated gene silencing or activation.