MicroRNA 520e (miR-520e)

MicroRNA 520e (miR-520e) is a member of the microRNA (miRNA) family, a group of short (~20–24 nucleotides), non-coding RNAs that regulate gene expression post-transcriptionally by inhibiting translation or promoting the degradation of target mRNAs[3]. miR-520e has been implicated in the regulation of key cancer-related pathways, including NF-κB and TGF-β, and can function either as an oncogene or tumor suppressor depending on the cellular context and cancer type[1][2][4]. It is upregulated in breast cancer, where it promotes proliferation, migration, and invasion and inhibits apoptosis of cancer cells, suggesting a potential oncogenic role[1]. In contrast, in hepatocellular carcinoma, miR-520e acts as a tumor suppressor, inhibiting tumor growth by targeting the NF-κB-inducing kinase (NIK) and downstream signaling components[2]. The precise biological role of miR-520e is determined by its specific mRNA targets and the molecular environment of the tissue in which it is expressed. miR-520e is therefore recognized as both a putative therapeutic target and a biomarker in several human cancers, though clinical drug development is still at an early stage.

Other names

hsa-miR-520eMIR520EMIRN520Ehsa-mir-520e

Inhibition of target gene translation or induction of mRNA destabilization via RNA-induced silencing complex (RISC) Modulation of oncogenes/tumor suppressor genes (e.g., direct targeting of NF-κB-inducing kinase (NIK), RELA/p65, TGFBR2)