SMAD family member 7 mRNA 3'-untranslated region (Smad7 mRNA 3'-UTR)

The Smad7 mRNA 3'-untranslated region (3'-UTR) is a critical regulatory segment of the transcript encoding the inhibitory Smad7 protein. Smad7 is a key negative regulator of the Transforming Growth Factor-beta (TGF-beta) and Bone Morphogenetic Protein (BMP) signaling pathways, acting by blocking receptor-mediated phosphorylation of R-Smads and promoting receptor degradation. The 3'-UTR serves as a major hub for post-transcriptional control, containing multiple binding sites for microRNAs (miRNAs) such as miR-21, miR-15, and miR-195, which repress Smad7 expression. Dysregulation of this region or its associated miRNAs is linked to various pathologies, including Crohn's disease, where Smad7 overexpression inhibits anti-inflammatory TGF-beta signaling, and several cancers where Smad7 levels influence tumor progression and metastasis. Consequently, the Smad7 mRNA 3'-UTR is an important target for RNA-based therapeutics, such as miRNA mimics or antisense oligonucleotides, designed to modulate Smad7 levels and restore signaling homeostasis.

Other names

Mothers against decapentaplegic homolog 7 mRNA 3'-UTRSMAD7 3'-UTRMADH7 mRNA 3'-UTRSmad7 3'-untranslated region

Binding of microRNAs or antisense oligonucleotides to the 3'-UTR sequence leads to translational repression or mRNA degradation, thereby modulating Smad7 protein levels and downstream TGF-beta/BMP signaling pathways.