Several putative polyadenylation sequences and an adenylate plus timidylate rich element (ARE) are present at the 3 ′ end of the rat advanced glycation end products receptor (RAGE) gene. Two transcripts are generated by the use of alternative polyadenylation sequences, one containing the ARE sequence in its 3 ′ -untranslated region (3 ′ -UTR). Transfections of CHO-k1 or NRK cells with constructs expressing the 3 ′ -UTRs of the transcripts fused to a green fluorescence protein mRNA show that the ARE sequence has a negative effect on protein expression correlating with a decrease in the amount of mRNA, as shown in CHO-k1 transfected cells. When transfected cells were incubated in the presence of Actinomycin D the amount of fluorescence decreased in cells transfected with the ARE sequence, indicating that this sequence induces lower mRNA stability. Thus, alternative polyadenylation signals and an ARE sequence provide a novel mechanism for the regulation of the rat RAGE gene expression.
/lp/elsevier/au-rich-elements-in-the-mrna-3-untranslated-region-of-the-rat-receptor-v3naAmtVsr