Retinoblastoma 1 messenger RNA 3'-untranslated region (RB1 mRNA 3'-UTR) (RB1 mRNA 3'-UTR)

The Retinoblastoma 1 (RB1) mRNA 3'-untranslated region (3'-UTR) is a key regulatory sequence located downstream of the coding region of the RB1 gene, which encodes the pRb tumor suppressor protein. This region serves as a scaffold for the binding of various microRNAs (miRNAs) and RNA-binding proteins (RBPs) that post-transcriptionally regulate RB1 expression by influencing mRNA degradation and translation (Ivanovska et al., 2008, PubMed: 18347084). In several human cancers, oncogenic miRNAs such as miR-106b, miR-17, and miR-20a bind to the RB1 3'-UTR to downregulate pRb levels, thereby promoting aberrant cell cycle progression and tumor growth (Volinia et al., 2006, PubMed: 16477017). Because of its central role in controlling a major tumor suppressor, the RB1 3'-UTR is considered a viable therapeutic target for RNA-targeted therapies, such as antisense oligonucleotides (ASOs) or miRNA inhibitors, designed to prevent miRNA-mediated silencing and restore pRb function. These therapeutic strategies aim to re-engage the G1/S cell cycle checkpoint, particularly in tumors where RB1 is transcriptionally active but post-transcriptionally suppressed. While clinical applications are currently in the research and development phase, the specificity of targeting the 3'-UTR offers a precise mechanism to modulate protein output without altering the genomic sequence.

Other names

RB1 3'-UTRRetinoblastoma 1 3'-untranslated regionpRb mRNA 3'-UTRRB 3'-UTR

Modulation of mRNA stability and translation by sterically blocking microRNA binding sites or RNA-binding protein interactions within the 3'-untranslated region.