Chronic RNA G-quadruplex accumulation in aging and Alzheimer’s disease
Year: 2025
Type: article
Study design: Observational Study
Abstract: ABSTRACT INTRODUCTION As the world population ages, new molecular targets in aging and Alzheimer’s Disease (AD) are needed to combat the expected influx of new AD cases. Until now, the role of RNA structure in aging and neurodegeneration has largely remained unexplored. METHODS In this study, we examined human hippocampal postmortem tissue for the formation of RNA G-quadruplexes (rG4s) in aging and AD. RESULTS We found that rG4 immunostaining strongly increased in the hippocampus with both age and with AD severity. We further found that neurons with accumulation of phospho-tau immunostaining contained rG4s, that rG4 structure can drive tau aggregation, and that rG4 staining density depended on APOE genotype in the human tissue examined. DISCUSSION Combined with previous studies showing the dependence of rG4 structure on stress and the extreme power of rG4s at oligomerizing proteins, we propose a model of neurodegeneration in which chronic rG4 formation is linked to proteostasis collapse. These morphological findings suggest that further investigation of RNA structure in neurodegeneration is a critical avenue for future treatments and diagnoses.
Source: eLife
Language: English
Subfield: Physiology
Field: Medicine
Domain: Health Sciences
Open Access status: gold
Estimated APC paid: $2,500
Awards: G1853423388, Noradrenergic dysfunction in Down Syndrome, G4259357631, G4820277279, International Brain Bank for Down syndrome-related Alzheimer's disease, G6903682747, Tau pathology in Down syndrome and Alzheimer's, G8726820484, G9000024916, G9000070165, G9000167562, Exosome biology in Alzheimer's disease and concussion
OpenAlex ID: W4407870648