Introduction to RNA Interference by Dr Munjita-unza

Description

This lecture note provides detailed tertiary-level academic material on the mechanism and applications of RNA interference (RNAi). It explains RNAi as a conserved post-transcriptional process triggered by double-stranded RNA, leading to sequence-specific gene silencing. The document distinguishes between the two primary classes of small regulatory RNAs: microRNAs (miRNAs), which are endogenously encoded and involved in broad regulatory networks, and small interfering RNAs (siRNAs), typically exogenous and used for precise gene targeting. The core biochemical pathway is outlined, involving the enzyme Dicer, which processes dsRNA into fragments, and the Argonaute proteins, which are core components of the RNA-induced silencing complex (RISC) that guides mRNA cleavage or translational repression. The note highlights the historical significance of RNAi, recognized by a Nobel Prize, and its wide-ranging uses in functional genomics research and as a promising therapeutic strategy for diseases like cancer and viral infections. This resource is designed for university students in molecular biology, genetics, and biomedical sciences programmes, offering clear explanations of a complex regulatory mechanism to support exam revision and deepen understanding of gene expression control. It serves as valuable preparation material for students pursuing diplomas and degrees, illustrating how fundamental cellular processes are harnessed in modern biotechnology and medicine. Advance your knowledge of gene regulation by studying this focused overview of RNA interference.