Multiple intracellular mRNA targets via miRNA cargo

Multiple intracellular mRNA targets via miRNA cargo refers to a therapeutic modality rather than a single molecular entity. This approach utilizes microRNAs (miRNAs)—small, non-coding RNA molecules—to simultaneously regulate a broad network of messenger RNA (mRNA) transcripts within a cell (Bartel, D. P., Cell, 2004). Unlike traditional small molecules that target a single protein, a single miRNA can bind to the 3' untranslated regions (UTRs) of hundreds of different mRNAs, allowing for the coordinated modulation of entire biological pathways (Rupaimoole, R., & Slack, F. J., Nature Reviews Drug Discovery, 2017). This strategy is particularly valuable in treating complex diseases like cancer, where multiple oncogenic drivers must be suppressed to prevent therapeutic resistance (Kalluri, R., & LeBleu, V. S., Science, 2020). The miRNA cargo is typically encapsulated in delivery vehicles such as lipid nanoparticles (LNPs) or exosomes to protect the RNA from degradation and facilitate cellular uptake. Once inside the cytoplasm, the miRNA integrates into the RNA-induced silencing complex (RISC) to mediate post-transcriptional gene silencing through mRNA cleavage or translational repression (Adams, B. D., et al., Molecular Therapy, 2017).

Other names

miRNA-mediated gene silencingmicroRNA-target networksmiRNA-mRNA interactomePost-transcriptional gene regulation network

miRNAs are delivered into the intracellular environment (often via exosomes or lipid nanoparticles) where they are loaded into the RNA-induced silencing complex (RISC). The miRNA then acts as a guide to bind complementary sequences, typically in the 3' untranslated regions (UTRs), of multiple target mRNAs, leading to their degradation or the inhibition of their translation.