High mobility group AT-hook 2 mRNA 3'-untranslated region (HMGA2 mRNA 3'-UTR)

The HMGA2 mRNA 3'-untranslated region (3'-UTR) is a critical regulatory segment of the High Mobility Group AT-Hook 2 transcript, spanning approximately 3 kilobases and containing multiple evolutionary conserved binding sites for the let-7 microRNA family. Under normal physiological conditions, let-7 binds to this region to suppress HMGA2 expression, thereby regulating cell proliferation and differentiation. In many cancers, chromosomal translocations or deletions lead to the loss of the 3'-UTR, resulting in 'let-7-mediated escape' and subsequent overexpression of the HMGA2 protein, which drives oncogenic processes such as the epithelial-mesenchymal transition (EMT) and metastasis. As a therapeutic target, the HMGA2 mRNA 3'-UTR is being explored for the development of RNA-targeted therapies, including antisense oligonucleotides and small molecules designed to either mimic microRNA suppression or prevent the oncogenic stabilization of the transcript. Targeting this region offers a strategy to downregulate a potent driver of tumor progression that is otherwise difficult to inhibit at the protein level.

Other names

HMGA2 3'-UTRHMGA2 3-prime untranslated regionHigh-mobility group protein HMGI-C mRNA 3'-UTR

Modulation of mRNA stability and translation efficiency through the competitive inhibition or enhancement of microRNA binding (specifically the let-7 family) or through antisense-mediated degradation of the transcript.