High mobility group AT-hook 1 messenger RNA 3' untranslated region (HMGA1 3'UTR)

The High mobility group AT-hook 1 (HMGA1) messenger RNA 3' untranslated region (3'UTR) is a critical regulatory segment of the HMGA1 transcript that governs the stability and translation of the HMGA1 protein (Source: PubMed, PMID: 17434132). This region is notably long and contains multiple binding sites for the let-7 microRNA family, which normally suppresses HMGA1 expression (Source: Nature, doi:10.1038/nature02378). In many cancers, the HMGA1 3'UTR is truncated or lost due to chromosomal rearrangements, leading to protein overexpression and oncogenic transformation (Source: UniProt, P17096). Beyond its role as a cis-regulatory element, the HMGA1 3'UTR functions as a competing endogenous RNA (ceRNA), acting as a molecular sink for microRNAs and thereby regulating the expression of other genes involved in cell growth and metabolism (Source: Cell, doi:10.1016/j.cell.2011.07.034). Consequently, this mRNA region is an emerging therapeutic target for antisense oligonucleotides and small molecules designed to modulate HMGA1 levels or restore normal microRNA-mediated regulation in diseases such as cancer and type 2 diabetes (Source: NIH, PMC4133183). Targeting this region offers a strategy to indirectly control the HMGA1 protein, which is otherwise difficult to target directly due to its lack of a defined enzymatic pocket.

Other names

HMGA1 3'UTRHigh mobility group protein A1 3' untranslated regionHMGA1 3-prime UTR

Antisense oligonucleotides (ASOs) target the 3'UTR to induce RNase H-mediated degradation or block regulatory protein binding, while microRNA mimics restore the natural inhibitory control over the transcript (Source: PubMed, PMID: 25053460).