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Huntington's disease (HD) is an age-related neurodegenerative disease associated with the aggregation of mutant Huntingtin protein (mHTT). It is theorized that prevention or clearance of these aggregates through autophagy and the ubiquitin proteasome system (UPS) protects neurons from degeneration. Using a model of HD, a small reverse genetic screen of 100 random genes on Chromosome 3 identified as a genetic modifier of mHTT accumulation. During development, loss of by RNAi ( i) protects against mHTT accumulation, implicating as a negative regulator of protein aggregation prevention or clearance. Here we report that knocking down leads to decreased mHTT protein aggregation through the upregulation of the UPS and autophagy pathways, leading to increased lifespan. Further experimentation using a nematode model of Alzheimer's disease demonstrates i protects against paralysis by decreasing beta amyloid protein misfolding in body wall muscles.
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http://dx.doi.org/10.17912/micropub.biology.001497 | DOI Listing |
RSC Med Chem
August 2025
Department of Biological Science, Birla Institute of Technology and Science, Pilani Hyderabad Campus, Jawahar Nagar, Kapra Mandal, Medchal District Telangana 500078 India
Mitochondrial dysfunction is one of the primary cellular conditions involved in developing Huntington's disease (HD) pathophysiology. The accumulation of mutant huntingtin protein with abnormal PolyQ repeats resulted in the death of striatal neurons with enhanced mitochondrial fragmentation. In search of neuroprotective molecules against HD conditions, we synthesized a set of isoxazole-based small molecules to screen their suitability as beneficial chemicals improving mitochondrial health.
View Article and Find Full Text PDFBrain Commun
August 2025
Department of Neurology, Massachusetts General Hospital, Charlestown, MA 02129, USA.
was identified in human and mouse Huntington's disease brain as the pathogenic exon 1 mRNA generated from aberrant splicing between exon 1 and 2 of that contributes to aggregate formation and neuronal dysfunction. Detection of the huntingtin exon 1 protein (HTT1a) has been accomplished with Meso Scale Discovery, Homogeneous Time Resolved Fluorescence and immunoprecipitation assays in Huntington's disease knock-in mice, but direct detection in homogenates by gel electrophoresis and western blot assay has been lacking. Subcellular fractions prepared from mouse and human Huntington's disease brain were separated by gel electrophoresis and probed by western blot with neoepitope monoclonal antibodies 1B12 and 11G2 directed to the C-terminal eight residues of HTT1a.
View Article and Find Full Text PDFNeurogenetics
September 2025
Nur International University, 54600, Lahore, Punjab, Pakistan.
Huntington's disease (HD) is a progressive, autosomal dominant neurodegenerative disorder characterized by motor dysfunction, cognitive decline, and psychiatric disturbances. It is caused by CAG repeat expansions in the HTT gene, resulting in the formation of mutant huntingtin protein that aggregates and disrupts neuronal function. This review outlines the pathogenesis of HD, including genetic, molecular, and environmental factors.
View Article and Find Full Text PDFNeural Regen Res
September 2025
Department of Internal Medicine, Texas Tech University Health Sciences Center, Lubbock, TX, USA.
Voltage-dependent anion channel 1 is an integral outer membrane protein of the mitochondria that governs apoptosis, enables metabolite exchange, and influences mitochondrial activity. In neurodegenerative diseases, such as amyotrophic lateral sclerosis, Parkinson's disease, Huntington's disease, and Alzheimer's disease, oxidative stress, neuroinflammation, and mitochondrial dysfunction are frequent features. Voltage-dependent anion channel 1 is a key regulator of these processes.
View Article and Find Full Text PDFNeurodegener Dis Manag
August 2025
Centre for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia, New Delhi, India.
Huntington's disease (HD) is an autosomal, progressive, dominant inherited neurological disorder characterized by motor dysfunction, cognitive decline, and psychiatric symptoms. HD is caused by abnormal expansion of trinucleotide CAG in exon1 of the gene and the accumulation of mutant huntingtin (mHTT) fragments, which leads to neurotoxicity mainly in the brain's cortex region. This review aimed to collect current research on developing effective treatment strategies, including small-molecule approaches, gene therapies, and protein degradation techniques to reduce the mHTT levels.
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