Loss of DNA glycosylases improves health and cognitive function in a C. elegans model of human tauopathy.
Nucleic Acids Res
; 2024 Aug 16.
Article
in En
| MEDLINE
| ID: mdl-39149885
ABSTRACT
Alzheimer's disease (AD) is a neurodegenerative disorder representing a major burden on families and society. Some of the main pathological hallmarks of AD are the accumulation of amyloid plaques (Aß) and tau neurofibrillary tangles. However, it is still unclear how Aß and tau aggregates promote specific phenotypic outcomes and lead to excessive oxidative DNA damage, neuronal cell death and eventually to loss of memory. Here we utilized a Caenorhabditis elegans (C. elegans) model of human tauopathy to investigate the role of DNA glycosylases in disease development and progression. Transgenic nematodes expressing a pro-aggregate form of tau displayed altered mitochondrial content, decreased lifespan, and cognitive dysfunction. Genetic ablation of either of the two DNA glycosylases found in C. elegans, NTH-1 and UNG-1, improved mitochondrial function, lifespan, and memory impairment. NTH-1 depletion resulted in a dramatic increase of differentially expressed genes, which was not apparent in UNG-1 deficient nematodes. Our findings clearly show that in addition to its enzymatic activity, NTH-1 has non-canonical functions highlighting its modulation as a potential therapeutic intervention to tackle tau-mediated pathology.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Language:
En
Journal:
Nucleic Acids Res
Year:
2024
Type:
Article
Affiliation country:
United States