microRNA-194 (miR-194)

MicroRNA-194 (miR-194) is a small, non-coding RNA molecule that serves as a key post-transcriptional regulator of gene expression by binding to the 3' untranslated regions of target mRNAs (1.1.2, 1.1.5). It is highly expressed in the gastrointestinal tract, liver, and kidneys, where it facilitates essential biological processes such as cell differentiation, proliferation, and apoptosis (1.3.1, 1.3.4). In oncology, miR-194 often functions as a tumor suppressor, and its downregulation is associated with advanced disease stages and poor prognosis in colorectal, non-small cell lung, and gastric cancers (1.2.2, 1.2.4). It exerts its anti-tumor effects by inhibiting the epithelial-mesenchymal transition (EMT) and metastasis through the repression of targets like ZEB1, Bmi1, and FOXA1 (1.2.3, 1.2.4, 1.4.3). Conversely, miR-194 can exhibit pathological roles in other settings, such as promoting cardiomyocyte apoptosis in doxorubicin-induced cardiotoxicity and contributing to acute kidney injury (1.2.5, 1.4.2). Therapeutic approaches involve the administration of synthetic miR-194 mimics to restore its activity in cancers or the use of antisense oligonucleotides (antagomirs) to inhibit its function in cardiovascular and fibrotic diseases (1.1.5, 1.3.2). While miR-194 shows promise as both a therapeutic target and a diagnostic biomarker, clinical translation is currently limited by challenges in targeted delivery and the potential for off-target effects on unintended gene networks (1.4.1, 1.4.4).

Other names

MIR194MIRN194hsa-miR-194MicroRNA 194-1MicroRNA 194-2

MicroRNA-194 regulates gene expression post-transcriptionally by binding to the 3' untranslated region (UTR) of target mRNAs, leading to translational repression or mRNA degradation. Therapeutic intervention involves the use of synthetic mimics to replenish miR-194 levels in diseases where it is deficient (e.g., certain cancers) or antisense oligonucleotides (antagomirs) to sequester and inhibit miR-194 when it contributes to disease progression (e.g., cardiotoxicity).