Low-density lipoprotein receptor gene negative regulatory elements (LDLR NREs)

Low-density lipoprotein receptor (LDLR) gene negative regulatory elements are specific DNA and RNA sequences that function to suppress the expression of the LDLR gene [1, 3]. These elements are primarily located within the 3' untranslated region (UTR) of the LDLR mRNA and include AU-rich elements (AREs) and microRNA response elements (MREs) for regulators like miR-148a and miR-128 [1, 4, 14]. These sequences act as docking sites for RNA-binding proteins (such as hnRNP D and KSRP) and microRNA-induced silencing complexes that trigger mRNA degradation or translational inhibition, effectively reducing the number of LDL receptors available on the hepatocyte surface [3, 4]. Because the LDLR is the primary pathway for clearing atherogenic LDL-cholesterol from the circulation, these negative regulatory elements are significant therapeutic targets for treating hypercholesterolemia [2, 12]. By using antisense oligonucleotides, antagomirs, or small molecules like berberine to block these elements, researchers can stabilize LDLR mRNA and increase receptor levels [3, 4, 6]. This approach provides a potent mechanism to lower plasma cholesterol and mitigate the risk of cardiovascular disease, particularly in patients who do not respond adequately to traditional statin therapy [7, 12].

Other names

LDLR 3' UTRLDLR AU-rich elementsLDLR miRNA response elementsLDLR promoter negative elementsLDLR AREsLDLR MREs

Inhibition of negative regulatory sequences (such as miRNA binding sites or AU-rich elements) to stabilize LDLR mRNA and increase receptor density on the cell surface, thereby enhancing LDL-cholesterol clearance [1, 3, 4].