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Sirt1 is a NAD-dependent deacetylase that has been shown as a link between energy metabolism and aging. Its putative role as a target for neurodegenerative disorders has recently been suggested; yet, little is known about the changes that occur in Sirt1 levels in the aging brain. Here we show by in situ hybridization that Sirt1 expression is modified in specific areas of the brain in mice upon aging,...
High metabolic activity and low levels of antioxidant enzymes make neurons particularly prone to damage by reactive oxygen species. Thus, repair of oxidative DNA damage is essential for normal brain function. Base excision repair is the major pathway for repair of oxidative DNA damage, and is initiated by DNA glycosylases recognizing and removing the damaged base. In mammalian cells at least five...
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