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• W2154574150 endingPage "3488" @default.
• W2154574150 startingPage "3474" @default.
• W2154574150 abstract "Huntington's disease (HD) is an incurable neurological disorder caused by an abnormal glutamine repeat expansion in the huntingtin (Htt) protein. In the present studies, we investigated the role of Transducers of Regulated cAMP response element-binding (CREB) protein activity (TORCs) in HD, since TORCs play an important role in the expression of the transcriptional co-regulator peroxisome proliferator-activated receptor gamma coactivator 1α (PGC-1α), whose expression is impaired in HD. We found significantly decreased TORC1 expression levels in STHdhQ111 cells expressing mutant Htt, in the striatum of NLS-N171-82Q, R6/2 and HdhQ111 HD transgenic mice and in postmortem striatal tissue from HD patients. TORC1 overexpression in wild-type (WT) and Htt striatal cells increased CREB mRNA and protein levels, PGC-1α promoter activity, mRNA expression of the PGC-1α, NRF-1, Tfam and CytC genes, mitochondrial DNA content, mitochondrial activity and mitochondrial membrane potential. TORC1 overexpression also increased the resistance of striatal cells to 3-nitropropionic (3-NP) acid-mediated toxicity. In cultured WT and mutant Htt striatal cells, small hairpin RNA-mediated TORC1 knockdown resulted in decreased PGC-1α expression and increased susceptibility to 3-NP-induced toxicity. Overexpression of PGC-1α partially prevented TORC1 knockdown-mediated increased susceptibility of Htt striatal cells to 3-NP. Specific knockdown of TORC1 in the striatum of NLS-N171-82Q HD transgenic mice induced neurodegeneration. Lastly, knockdown of Htt prevents transcriptional repression of TORC1 and CREB in Htt striatal cells. These findings show that impaired expression and function of TORC1, which results in a reduction in PGC-1α, plays an important role in mitochondrial dysfunction in HD." @default.
• W2154574150 created "2016-06-24" @default.
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• W2154574150 date "2012-05-15" @default.
• W2154574150 modified "2023-10-13" @default.
• W2154574150 title "Transducer of regulated CREB-binding proteins (TORCs) transcription and function is impaired in Huntington's disease" @default.
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• W2154574150 doi "https://doi.org/10.1093/hmg/dds178" @default.
• W2154574150 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/3491961" @default.
• W2154574150 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/22589249" @default.
• W2154574150 hasPublicationYear "2012" @default.
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