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- W856683536 endingPage "68" @default.
- W856683536 startingPage "39" @default.
- W856683536 abstract "Elevated blood glucose associated with diabetes produces progressive and apparently irreversible damage to many cell types. Conversely, reduction of glucose extends life span in yeast, and dietary restriction reduces blood glucose. Therefore it has been hypothesized that cumulative toxic effects of glucose drive at least some aspects of the aging process and, conversely, that protective effects of dietary restriction are mediated by a reduction in exposure to glucose. The mechanisms mediating cumulative toxic effects of glucose are suggested by two general principles of metabolic processes, illustrated by the lac operon but also observed with glucose-induced gene expression. First, metabolites induce the machinery of their own metabolism. Second, induction of gene expression by metabolites can entail a form of molecular memory called hysteresis. When applied to glucose-regulated gene expression, these two principles suggest a mechanism whereby repetitive exposure to postprandial excursions of glucose leads to an age-related increase in glycolytic capacity (and reduction in beta-oxidation of free fatty acids), which in turn leads to an increased generation of oxidative damage and a decreased capacity to respond to oxidative damage, independent of metabolic rate. According to this mechanism, dietary restriction increases life span and reduces pathology by reducing exposure to glucose and therefore delaying the development of glucose-induced glycolytic capacity." @default.
- W856683536 created "2016-06-24" @default.
- W856683536 creator A5001208577 @default.
- W856683536 creator A5009254285 @default.
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- W856683536 creator A5034646682 @default.
- W856683536 creator A5047092890 @default.
- W856683536 creator A5061273168 @default.
- W856683536 date "2006-01-01" @default.
- W856683536 modified "2023-09-30" @default.
- W856683536 title "Secrets of the lac Operon" @default.
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