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Evaluating polyglutamine protein aggregation and toxicity in transgenic Caenorhabditis elegans models of Huntington's disease.
Methods Cell Biol
January 2025
State University of Minas Gerais, Department of Biomedical Sciences and Health, Passos, MG, Brazil. Electronic address:
Huntington's disease (HD) is an autosomal dominant neurodegenerative disorder characterized by a repeat of the cytosine-adenine-guanine trinucleotide (CAG) in the huntingtin gene (HTT). This results in the translation of a mutant huntingtin (mHTT) protein with an abnormally long polyglutamine (polyQ) repeat. The pathology of HD leads to neuronal cell loss, motor abnormalities, and dementia.
View Article and Find Full Text PDFErinacine A-Enriched Mycelium Ethanol Extract Lessens Cellular Damage in Cell and Models of Spinocerebellar Ataxia Type 3 by Improvement of Nrf2 Activation.
Antioxidants (Basel)
December 2024
Department of Nutrition, Chung Shan Medical University, Taichung 402, Taiwan.
Spinocerebellar ataxia type 3 (SCA3), caused by the abnormal expansion of polyglutamine (polyQ) in the ataxin-3 protein, is one of the inherited polyQ neurodegenerative diseases that share similar genetic and molecular features. Mutant polyQ-expanded ataxin-3 protein is prone to aggregation in affected neurons and is predominantly degraded by autophagy, which is beneficial for neurodegenerative disease treatment. Not only does mutant polyQ-expanded ataxin-3 increase susceptibility to oxidative cytotoxicity, but it also hampers antioxidant potency in neuronal cells.
View Article and Find Full Text PDFA nucleolar mechanism suppresses organismal proteostasis by modulating TGFβ/ERK signalling.
Nat Cell Biol
January 2025
Department of Biochemistry and Molecular Biology, the Institute for Medical Research Israel-Canada, the Faculty of Medicine, The Hebrew University of Jerusalem, Jerusalem, Israel.
The protein homeostasis (proteostasis) network encompasses a myriad of mechanisms that maintain the integrity of the proteome by controlling various biological functions, including protein folding and degradation. Alas, ageing-associated decline in the efficiency of this network enables protein aggregation and consequently the development of late-onset neurodegenerative disorders, such as Alzheimer's disease. Accordingly, the maintenance of proteostasis through late stages of life bears the promise to delay the emergence of these devastating diseases.
View Article and Find Full Text PDFDocosahexaenoic Acid (DHA) Supplementation in a Triglyceride Form Prevents from Polyglutamine-Induced Dysfunctions in .
Int J Mol Sci
November 2024
Nutrigenomics Research Group, Departament de Bioquímica i Biotecnologia, Universitat Rovira i Virgili, 43007 Tarragona, Spain.
A common hallmark of neurodegenerative diseases is the accumulation of polypeptide aggregates in neurons. Despite the primary cause of these diseases being inherently genetic, their development can be delayed with proper preventive treatments. Long-chain polyunsaturated fatty acids (ω-3 LCPUFA) are promising bioactive nutrients that are beneficial for brain health.
View Article and Find Full Text PDFSpinocerebellar ataxia type 17 (SCA17) is a hereditary neurodegenerative disorder characterized by progressive motor and cognitive decline, leading to severe disability and death. SCA17 is caused by a CAG repeat expansion mutation in the TBP gene, resulting in the production of an abnormally long polyglutamine tract, which classifies it as a polyglutamine disorder. At present, there is no effective treatment for SCA17, and existing therapies provide only symptomatic relief.
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