MicroRNA 409-3p (miR-409-3p)

MicroRNA 409-3p (miR-409-3p) is a small non-coding RNA molecule that plays a critical role in the post-transcriptional regulation of gene expression. It is encoded within the DLK1-DIO3 imprinted cluster on human chromosome 14q32, a region frequently associated with various developmental processes and diseases [Source: miRBase; PubMed, PMID: 25313081]. miR-409-3p functions by base-pairing with the 3' untranslated regions (UTRs) of specific target mRNAs, resulting in their degradation or the inhibition of their translation. In the context of oncology, miR-409-3p exhibits dual roles; it acts as a tumor suppressor in cancers such as gastric and colorectal cancer by inhibiting oncogenic targets like PHF10 and GAB1, while it can promote metastasis in prostate cancer by inducing the epithelial-mesenchymal transition (EMT) through the targeting of STAG2 or ZEB1/2 [Source: PubMed, PMID: 24907110; PMID: 28656234]. Beyond cancer, it has been implicated in neurodegenerative conditions and psychiatric disorders, making it a potential biomarker and therapeutic target. Current therapeutic approaches focus on the use of synthetic miRNA mimics to restore lost function or antisense oligonucleotides (antagomirs) to neutralize overexpressed miR-409-3p in specific disease states.

Other names

hsa-miR-409-3pMIR409MicroRNA 409miR-409

Binds to the 3' untranslated region (UTR) of target messenger RNAs (mRNAs) through sequence complementarity, leading to translational repression or mRNA degradation, thereby modulating downstream signaling pathways such as PI3K/Akt, MAPK, and Wnt/beta-catenin.