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• W2546938429 abstract "Monogenetic forms of amyotrophic lateral sclerosis (ALS) offer an opportunity for unraveling the molecular mechanisms underlying this devastating neurodegenerative disorder. In order to identify a link between ALS-related metabolic changes and neurodegeneration, we investigated whether ALS-causing mutations interfere with the peripheral and brain-specific expression and signaling of the metabolic master regulator PGC (PPAR gamma coactivator)-1α (PGC-1α). We analyzed the expression of PGC-1α isoforms and target genes in two mouse models of familial ALS and validated the stimulated PGC-1α signaling in primary adipocytes and neurons of these animal models and in iPS derived motoneurons of two ALS patients harboring two different frame-shift FUS/TLS mutations. Mutations in SOD1 and FUS/TLS decrease Ppargc1a levels in the CNS whereas in muscle and brown adipose tissue Ppargc1a mRNA levels were increased. Probing the underlying mechanism in neurons, we identified the monocarboxylate lactate as a previously unrecognized potent and selective inducer of the CNS-specific PGC-1α isoforms. Lactate also induced genes like brain-derived neurotrophic factor, transcription factor EB and superoxide dismutase 3 that are down-regulated in PGC-1α deficient neurons. The lactate-induced CNS-specific PGC-1α signaling system is completely silenced in motoneurons derived from induced pluripotent stem cells obtained from two ALS patients harboring two different frame-shift FUS/TLS mutations. ALS mutations increase the canonical PGC-1α system in the periphery while inhibiting the CNS-specific isoforms. We identify lactate as an inducer of the neuronal PGC-1α system directly linking brain metabolism and neuroprotection. Changes in the PGC-1α system might be involved in the ALS accompanied metabolic changes and in neurodegeneration." @default.
• W2546938429 created "2016-11-11" @default.
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• W2546938429 date "2017-01-01" @default.
• W2546938429 modified "2023-10-16" @default.
• W2546938429 title "ALS-causing mutations differentially affect PGC-1α expression and function in the brain vs. peripheral tissues" @default.
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• W2546938429 doi "https://doi.org/10.1016/j.nbd.2016.11.001" @default.
• W2546938429 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/27818323" @default.
• W2546938429 hasPublicationYear "2017" @default.
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