Please use this identifier to cite or link to this item:
http://hdl.handle.net/10773/41737
Title: | Amyloid pathology reduces ELP3 expression and tRNA modifications leading to impaired proteostasis |
Author: | Pereira, Marisa Ribeiro, Diana R. Berg, Maximilian Tsai, Andy P. Dong, Chuanpeng Nho, Kwangsik Kaiser, Stefanie Moutinho, Miguel Soares, Ana R. |
Keywords: | Alzheimer’s disease Elongator complex subunit 3 (ELP3) Proteostasis Translation tRNA modifications |
Issue Date: | Jan-2024 |
Publisher: | Elsevier |
Abstract: | Alzheimer's Disease (AD) is a neurodegenerative disorder characterized by accumulation of β-amyloid aggregates and loss of proteostasis. Transfer RNA (tRNA) modifications play a crucial role in maintaining proteostasis, but their impact in AD remains unclear. Here, we report that expression of the tRNA modifying enzyme ELP3 is reduced in the brain of AD patients and amyloid mouse models and negatively correlates with amyloid plaque mean density. We further show that SH-SY5Y neuronal cells carrying the amyloidogenic Swedish familial AD mutation (SH-SWE) display reduced ELP3 levels, tRNA hypomodifications and proteostasis impairments when compared to cells not carrying the mutation (SH-WT). Additionally, exposing SH-WT cells to the secretome of SH-SWE cells led to reduced ELP3 expression, wobble uridine tRNA hypomodification, and increased protein aggregation. Importantly, correcting tRNA deficits due to ELP3 reduction reverted proteostasis impairments. These findings suggest that amyloid pathology dysregulates proteostasis by reducing ELP3 expression and tRNA modification levels, and that targeting tRNA modifications may be a potential therapeutic avenue to restore neuronal proteostasis in AD and preserve neuronal function. |
Peer review: | yes |
URI: | http://hdl.handle.net/10773/41737 |
DOI: | 10.1016/j.bbadis.2023.166857 |
ISSN: | 0925-4439 |
Appears in Collections: | IBIMED - Artigos DCM - Artigos |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
1-s2.0-S0925443923002235-main-2.pdf | 9.73 MB | Adobe PDF | View/Open |
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.