Two human metabolites rescue a C. elegans model of Alzheimer's disease via a cytosolic unfolded protein response.
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Joshi, P., Perni, M., Limbocker, R., Mannini, B., Casford, S., Chia, S., Habchi, J., et al. (2021). Two human metabolites rescue a C. elegans model of Alzheimer's disease via a cytosolic unfolded protein response.. Communications biology, 4 (1), 843. https://doi.org/10.1038/s42003-021-02218-7
Age-related changes in cellular metabolism can affect brain homeostasis, creating conditions that are permissive to the onset and progression of neurodegenerative disorders such as Alzheimer's and Parkinson's diseases. Although the roles of metabolites have been extensively studied with regard to cellular signaling pathways, their effects on protein aggregation remain relatively unexplored. By computationally analysing the Human Metabolome Database, we identified two endogenous metabolites, carnosine and kynurenic acid, that inhibit the aggregation of the amyloid beta peptide (Aβ) and rescue a C. elegans model of Alzheimer's disease. We found that these metabolites act by triggering a cytosolic unfolded protein response through the transcription factor HSF-1 and downstream chaperones HSP40/J-proteins DNJ-12 and DNJ-19. These results help rationalise previous observations regarding the anti-ageing benefits of these metabolites, by providing a mechanism for their action. Our findings provide a link between metabolite homeostasis and protein homeostasis, which could inspire preventative interventions against neurodegenerative disorders.
Cytosol, Animals, Humans, Caenorhabditis elegans, Alzheimer Disease, Disease Models, Animal, Kynurenic Acid, Carnosine, Caenorhabditis elegans Proteins, Transcription Factors, HSP40 Heat-Shock Proteins, Unfolded Protein Response, Amyloid beta-Peptides, Protein Aggregates, Protein Aggregation, Pathological
Priyanka Joshi was funded by the Everitt Butterfield Research Fellowship from Downing College, University of Cambridge.
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External DOI: https://doi.org/10.1038/s42003-021-02218-7
This record's URL: https://www.repository.cam.ac.uk/handle/1810/323327
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