MicroRNA 20a-3p (miR-20a-3p)

MicroRNA 20a-3p is a small, non-coding RNA molecule of approximately 22 nucleotides, transcribed from the MIR20A gene, and processed from the 3' arm of the pre-miR-20a hairpin structure. Like other microRNAs, it does not encode protein but regulates gene expression via binding to complementary sequences in target mRNAs, resulting in mRNA degradation or translation inhibition. Its sequence and nomenclature are standardized based on species and location (e.g., hsa-miR-20a-3p for human). MiR-20a-3p has been shown to regulate critical genes involved in apoptosis, cell proliferation, immune response, and mitochondrial function. It exhibits context-specific roles in cancer, functioning as a tumor suppressor in oral squamous cell carcinoma and as a promoter in other cancers. Its dysregulation has also been implicated in acute kidney injury, inflammatory responses, and neurological diseases such as stroke. MiR-20a-3p is under investigation as a potential therapeutic target and biomarker given its expression changes in human diseases and its cell- and sex-specific effects. Therapeutic strategies include modulation by antisense oligonucleotides and gene therapy approaches to restore or inhibit its function. No specific small-molecule drugs are currently in clinical use targeting miR-20a-3p, but nucleic acid–based therapies and delivery systems are under research. Safety challenges for therapeutic targeting include broad off-target effects and possible immune responses.

Other names

MIR20A-3phsa-miR-20a-3p (for human)mmu-miR-20a-3p (for mouse)rno-miR-20a-3p (for rat)

Antisense oligonucleotides or inhibitors block miR-20a-3p, thereby reactivating its gene targets; MicroRNA mimics increase miR-20a-3p activity to downregulate specific mRNAs; Delivery systems for microRNAs or inhibitors (e.g., atelocollagen-based carriers)