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Abstract Title:

Novel insights into mitochondrial molecular targets of iron-induced neurodegeneration: Reversal by cannabidiol.

Abstract Source:

Brain Res Bull. 2018 Jan 29 ;139:1-8. Epub 2018 Jan 29. PMID: 29374603

Abstract Author(s):

Vanessa Kappel da Silva, Betânia Souza de Freitas, Victória Campos Dornelles, Luiza Wilges Kist, Maurício Reis Bogo, Milena Carvalho Silva, Emílio Luiz Streck, Jaime Eduardo Hallak, Antônio Waldo Zuardi, José Alexandre S Crippa, Nadja Schröder

Article Affiliation:

Vanessa Kappel da Silva

Abstract:

Evidence has demonstrated iron accumulation in specific brain regions of patients suffering from neurodegenerative disorders, and this metal has been recognized as a contributing factor for neurodegeneration. Using an experimental model of brain iron accumulation, we have shown that iron induces severe memory deficits that are accompanied by oxidative stress, increased apoptotic markers, and decreased synaptophysin in the hippocampus of rats. The present study aims to characterize iron loading effects as well as to determine the molecular targets of cannabidiol (CBD), the main non-psychomimetic compound of Cannabis sativa, on mitochondria. Rats received iron in the neonatal period and CBD for 14 days in adulthood. Iron induced mitochondrial DNA (mtDNA) deletions, decreased epigenetic modulation of mtDNA, mitochondrial ferritin levels, and succinate dehydrogenase activity. CBD rescued mitochondrial ferritin and epigenetic modulation of mtDNA, and restored succinate dehydrogenase activityin iron-treated rats. These findings provide new insights into molecular targets of iron neurotoxicity and give support for the use of CBD as a disease modifying agent in the treatment of neurodegenerative diseases.

Study Type : Animal Study

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