MicroRNA 1293 (miR-1293)

MicroRNA 1293 (miR-1293) is a small non-coding RNA molecule approximately 22 nucleotides in length that functions as a post-transcriptional regulator of gene expression[3]. It operates through the RNA interference mechanism by binding to complementary sequences in the 3' untranslated regions of target messenger RNAs, leading to either mRNA degradation or translational suppression[3]. miR-1293 has demonstrated significant tumor suppressor functions across multiple cancer cell lines, including oral, lung, colon, and esophageal cancers[2]. It exerts its anti-cancer effects through multiple mechanisms, including direct targeting of BRD4 (Bromodomain-containing protein 4) and several DNA repair genes including APEX1 (apurinic-apyrimidinic endonuclease 1), RPA1 (replication protein A1), and POLD4 (DNA polymerase delta 4)[2]. This concurrent targeting of both BRD4 and DNA repair pathways results in DNA damage accumulation and strong suppression of cancer cell growth through apoptosis induction[2]. In the context of viral infections, particularly Kaposi's sarcoma-associated herpesvirus (KSHV), miR-1293 plays a regulatory role in viral gene expression. The viral protein ORF57 competes with miR-1293 for binding sites on viral interleukin-6 (vIL-6) mRNA, thereby disrupting miR-1293-mediated translational repression and promoting viral protein expression[1]. This competitive mechanism demonstrates the complex interplay between cellular microRNAs and viral regulatory proteins. The biogenesis of miR-1293 follows the canonical microRNA pathway, involving processing from primary transcripts (pri-miRNAs) by Drosha in the nucleus to precursor miRNAs (pre-miRNAs), followed by cytoplasmic processing by Dicer to generate mature microRNAs that are incorporated into the RNA-induced silencing complex (RISC)[3]. Through this mechanism, miR-1293 can regulate hundreds of target genes simultaneously, making it a powerful regulator of cellular processes including DNA repair, cell proliferation, and apoptosis.

Other names

hsa-mir-1293MIRN1293mir-1293MIR1293hsa-miR-1293

Binds to complementary sequences in 3' untranslated regions of target mRNAs. Mediates gene silencing through RNA interference mechanism. Competes with viral proteins for RNA binding sites. Disrupts protein-RNA complexes involved in translational repression.