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Weinberger M, et al.  (2010) Growth signaling promotes chronological aging in budding yeast by inducing superoxide anions that inhibit quiescence. Aging (Albany NY) 2(10):709-26

Abstract: Inhibition of growth signaling pathways protects against aging and age-related diseases in parallel with reduced oxidative stress. The relationships between growth signaling, oxidative stress and aging remain unclear. Here we report that inSaccharomyces cerevisiae, alterations in growth signaling pathways impact levels of superoxide anions that promote chronological aging and inhibit growth arrest of stationary phase cells in G0/G1. Factors that decrease intracellular superoxide anions in parallel with enhanced longevity and more efficient G0/G1 arrest include genetic inactivation of growth signaling pathways that inhibit Rim15p, which activates oxidative stress responses, and downregulation of these pathways by caloric restriction. Caloric restriction also reduces superoxide anions independently of Rim15p by elevating levels of H2O2, which activates superoxide dismutases. In contrast, high glucose or mutations that activate growth signaling accelerate chronological aging in parallel with increased superoxide anions and reduced efficiency of stationary phase G0/G1 arrest. High glucose also activates DNA damage responses and preferentially kills stationary phase cells that fail to arrest growth in G0/G1. These findings suggest that growth signaling promotes chronological aging in budding yeast by elevating superoxide anions that inhibit quiescence and induce DNA replication stress. A similar mechanism likely contributes to aging and age-related diseases in complex eukaryotes.

Status: Published Type: Journal Article PubMed ID: 21076178

Topics addressed in this paper

Number of different genes curated to this paper: 12

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Topics Genes linked to topics (#1 - 10 )
CTA1 CTT1 MEC1 PDE2 RAD53 RAS2 RIM15 SCH9 SIC1 SNF1
Cell Cycle Phase Involved blue ball blue ball blue ball blue ball blue ball blue ball blue ball blue ball blue ball blue ball
Cell Growth and Metabolism blue ball blue ball blue ball blue ball blue ball blue ball blue ball blue ball blue ball blue ball
Genetic Interactions blue ball
Mutants/Phenotypes blue ball blue ball blue ball blue ball blue ball blue ball blue ball blue ball blue ball blue ball
Primary Literature blue ball blue ball blue ball blue ball blue ball blue ball blue ball blue ball blue ball blue ball
Strains/Constructs blue ball blue ball blue ball blue ball blue ball blue ball blue ball blue ball blue ball blue ball

Topics Genes linked to topics (#11 - 12 )
SOD2 TOR1
Cell Cycle Phase Involved blue ball blue ball
Cell Growth and Metabolism blue ball blue ball
Genetic Interactions blue ball
Mutants/Phenotypes blue ball blue ball
Primary Literature blue ball blue ball
Strains/Constructs blue ball blue ball

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