MicroRNA 519e (miR-519e)

MicroRNA 519e (miR-519e) is a small, non-coding RNA molecule encoded within the large, primate-specific C19MC microRNA cluster located on chromosome 19q13.42[1]. Like other microRNAs, miR-519e regulates gene expression post-transcriptionally by binding to complementary mRNA sequences, resulting in gene silencing or degradation[3]. Members of the C19MC family, including miR-519e, are minimally expressed in differentiated tissues but can be highly upregulated in certain cancers, such as hepatocellular carcinoma, where they contribute to oncogenesis by promoting cell proliferation, migration, and invasion[1]. They also appear to be regulated by epigenetic mechanisms, including methylation[1]. The unique expression patterns and oncogenic functions of miR-519e make it a candidate biomarker for certain cancer subtypes[1], although it is not currently directly targeted by approved therapeutic agents.

Other names

hsa-mir-519eMIR519EMIRN519E

MicroRNAs act by binding to complementary sequences on target messenger RNAs (mRNAs), leading to their degradation or inhibition of translation, thereby downregulating gene expression[1][3]. For miR-519e specifically, as a member of the C19MC cluster, its upregulation is associated with increased cell proliferation, migration, and invasion, particularly in hepatocellular carcinoma[1].