Calorie Restriction Extends Life Span— But Which Calories?
نویسندگان
چکیده
منابع مشابه
Calorie Restriction Extends Life Span— But Which Calories?
E vidence that calorie restriction (CR) retards aging and extends median and maximal life span was fi rst described in the 1930s by McCay et al. [1]. Since then, similar observations have been made in a variety of species including rodents, fi sh, fruit fl ies, worms, and yeast [2]—and although they are not yet defi nitive, results from ongoing longevity studies in monkeys suggest that CR will ...
متن کاملHigh osmolarity extends life span in Saccharomyces cerevisiae by a mechanism related to calorie restriction.
Calorie restriction (CR) extends life span in many different organisms, including mammals. We describe here a novel pathway that extends the life span of Saccharomyces cerevisiae mother cells but does not involve a reduction in caloric content of the media, i.e., there is growth of yeast cells in the presence of a high concentration of external osmolytes. Like CR, this longevity-promoting respo...
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Calorie restriction (CR) extends life span in a wide variety of species. Previously, we showed that calorie restriction increases the replicative life span in yeast by activating Sir2, a highly conserved NAD-dependent deacetylase. Here we test whether CR activates Sir2 by increasing the NAD/NADH ratio or by regulating the level of nicotinamide, a known inhibitor of Sir2. We show that CR decreas...
متن کاملSir2-Independent Life Span Extension by Calorie Restriction in Yeast
Calorie restriction slows aging and increases life span in many organisms. In yeast, a mechanistic explanation has been proposed whereby calorie restriction slows aging by activating Sir2. Here we report the identification of a Sir2-independent pathway responsible for a majority of the longevity benefit associated with calorie restriction. Deletion of FOB1 and overexpression of SIR2 have been p...
متن کاملCounting the calories: the role of specific nutrients in extension of life span by food restriction.
Reduction of food intake without malnourishment extends life span in many different organisms. The majority of work in this field has been performed in rodents where it has been shown that both restricting access to the entire diet and restricting individual dietary components can cause life-span extension. Thus, for insights into the mode of action of this intervention, it is of great interest...
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ژورنال
عنوان ژورنال: PLoS Medicine
سال: 2005
ISSN: 1549-1676
DOI: 10.1371/journal.pmed.0020231