microRNA 606 (miR-606)

microRNA 606 (miR-606) is a small, single-stranded non-coding RNA molecule involved in the post-transcriptional regulation of gene expression. In cancer, particularly triple-negative breast cancer, miR-606 has been identified as a tumor suppressor, inhibiting cell proliferation, stemness, migration, and invasion by directly targeting the mRNA of oncogenic effectors such as Stanniocalcin 1 (STC1). miR-606 expression is typically downregulated in breast cancer, especially in TNBC, correlating with poor prognosis. Experimentally, miR-606 mimics reduce tumor growth and metastatic potential in vivo, highlighting its promise as a biomolecular therapeutic target for antitumor interventions. There are currently no approved drugs directly targeting miR-606; experimental use involves miR-606 mimics for functional restoration in cancer models. MicroRNAs are not classical receptors or enzymes but represent a unique class of post-transcriptional gene regulators.

Other names

hsa-mir-606MIRN606MIR606miR-606microRNA-606

Direct binding to 3'-UTR of target mRNAs (e.g., STC1) to suppress their expression. Regulation of genes involved in tumorigenesis, such as downregulation of Stanniocalcin 1 (STC1). Induction of apoptosis via modulation of pro- and anti-apoptotic proteins (e.g., upregulation of BAX, cleaved-caspase 3; downregulation of PCNA, BCL-2).