Amyloid precursor protein mRNA 5'-untranslated region regulatory element (APP 5'-UTR)

The Amyloid precursor protein (APP) mRNA 5'-untranslated region (5'-UTR) regulatory element is a critical RNA structure that governs the translation of the APP protein, which is central to the development of Alzheimer's disease (Rogers et al., 2002). This regulatory region includes a type II iron-responsive element (IRE) and an interleukin-1 (IL-1) responsive element, making APP translation sensitive to both cellular iron levels and neuroinflammatory cytokines (Rogers et al., 1999; Rogers et al., 2002). Under conditions of iron overload or inflammation, the inhibitory binding of iron regulatory proteins (IRPs) to the IRE is weakened, leading to an up-regulation of APP synthesis and the subsequent production of neurotoxic amyloid-beta (Abeta) peptides (Rogers and Cahill, 2020). Small molecule drugs like buntanetap (posiphen) target this element by stabilizing the IRP-IRE interaction, effectively suppressing the translation of APP and other neurotoxic proteins such as alpha-synuclein and tau (Maccecchini et al., 2012; Chen et al., 2021). By reducing the burden of these aggregating proteins, therapies targeting the APP 5'-UTR aim to restore proteostasis, improve synaptic function, and slow the progression of neurodegenerative diseases like Alzheimer's and Parkinson's (Fang et al., 2022; Annovis Bio, 2024). This approach is distinct from monoclonal antibodies as it prevents the overproduction of toxic proteins at the source rather than clearing them after they have formed (Annovis Bio, 2024).

Other names

APP mRNA 5'-UTRAPP 5'-UTR IREAPP iron-responsive elementAPP 5'-UTR acute boxAPP 5'-UTR IL-1 responsive element

Translational inhibition by enhancing the binding of iron regulatory protein 1 (IRP1) to the iron-responsive element (IRE) in the 5'-UTR of the mRNA, thereby preventing ribosomal assembly and protein synthesis.