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• W2437090230 abstract "Laquinimod is an immunomodulatory compound that has shown neuroprotective benefits in clinical trials for multiple sclerosis. Laquinimod ameliorates both white and gray matter damage in human patients, and prevents axonal degeneration in animal models of multiple sclerosis. Axonal damage and white matter loss are a common feature shared between different neurodegenerative diseases. Caspase-6 activation plays an important role in axonal degeneration on the molecular level. Increased activity of caspase-6 has been demonstrated in brain tissue from presymptomatic Huntington disease mutation carriers, and it is an early marker of axonal dysfunction. Since laquinimod is currently undergoing a clinical trial in Huntington disease (LEGATO-HD, clinicaltrials.gov ID: NCT02215616), we set out to evaluate its impact on neuronal caspase-6 activation. We find that laquinimod ameliorates DNA-damage induced activation of caspase-6 in primary neuronal cultures. This is an indirect effect that is not mediated by direct inhibition of the enzyme. The investigation of potential caspase-6 activating mechanisms revealed that laquinimod reduces the expression of Bax, a pro-apoptotic molecule that causes mitochondrial cytochrome c release and caspase activation. Bax expression is furthermore increased in striatal tissues from the YAC128 mouse model of HD in an age-dependent manner. Our results demonstrate that laquinimod can directly downregulate neuronal apoptosis pathways relevant for axonal degeneration in addition to its known effects on astrocytes and microglia in the CNS. It targets a pathway that is relevant for the pathogenesis of HD, supporting the hypothesis that laquinimod may provide clinical benefit." @default.
• W2437090230 created "2016-06-24" @default.
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• W2437090230 date "2016-09-01" @default.
• W2437090230 modified "2023-09-26" @default.
• W2437090230 title "Laquinimod decreases Bax expression and reduces caspase-6 activation in neurons" @default.
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• W2437090230 doi "https://doi.org/10.1016/j.expneurol.2016.06.008" @default.
• W2437090230 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/27296315" @default.
• W2437090230 hasPublicationYear "2016" @default.
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