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Calorie Restricted and Non-Restricted Yeast

ABSTRACT: This SuperSeries is composed of the SubSeries listed below. Refer to individual Series

ORGANISM(S): Saccharomyces cerevisiae

SUBMITTER: Shelley Berger

PROVIDER: E-GEOD-53721 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Inactivation of yeast Isw2 chromatin remodeling enzyme mimics longevity effect of calorie restriction via induction of genotoxic stress response.

Dang Weiwei W Sutphin George L GL Dorsey Jean A JA Otte Gabriel L GL Cao Kajia K Perry Rocco M RM Wanat Jennifer J JJ Saviolaki Dimitra D Murakami Christopher J CJ Tsuchiyama Scott S Robison Brett B Gregory Brian D BD Vermeulen Michiel M Shiekhattar Ramin R Johnson F Brad FB Kennedy Brian K BK Kaeberlein Matt M Berger Shelley L SL

Cell metabolism 20140508 6

ATP-dependent chromatin remodeling is involved in all DNA transactions and is linked to numerous human diseases. We explored functions of chromatin remodelers during cellular aging. Deletion of ISW2, or mutations inactivating the Isw2 enzyme complex, extends yeast replicative lifespan. This extension by ISW2 deletion is epistatic to the longevity effect of calorie restriction (CR), and this mechanism is distinct from suppression of TOR signaling by CR. Transcriptome analysis indicates that isw2Δ ...[more]

PMID: 24814484

Similar Datasets

MNase-seq Experiments from Saccharomyces cerevisiae

Project description:MNase-seq Experiments from Calorie Restricted and Non-Restricted Yeast from WT, ISW2DEL and ISW2K215R strains We used MNase-seq to study genome-wide nucleosome positions under Calorie Restricted and Non-restricted Saccharomyces cerevisiae

2014-09-15 | E-GEOD-53718 | biostudies-arrayexpress

RNA-seq Experiments from Saccharomyces cerevisiae

Project description:RNA-seq Experiments from Calorie Restricted and Non-Restricted WT Yeast We used RNA-seq to study transcriptome changes under Calorie Restricted and Non-restricted Saccharomyces cerevisiae

2014-09-15 | E-GEOD-53720 | biostudies-arrayexpress

Sequence-Targeted Nucleosome Sliding in vivo - Nucleosome Mapping

Project description:Nucleosome positions were determined in wild type cells, cells lacking Isw2 or Ume6, and cells containing a hybrid Chd1-Ume6 chimeric remodeler Matched MNase digests from W303 strain variants during log growth (OD600=0.4-0.6) were subject to paired-end sequencing for nucleosome mapping. For effects of the engineered fusion remodeling protein, a catalytically inactive (ATPase dead D513N) variant was included as a control.

2016-03-12 | E-GEOD-72570 | biostudies-arrayexpress

Sequence-Targeted Nucleosome Sliding in vivo

Project description:This SuperSeries is composed of the SubSeries listed below. Refer to individual Series

2016-03-12 | E-GEOD-72572 | biostudies-arrayexpress

Transcriptome analysis in calorie-restricted rats implicates epigenetic and post-translational mechanisms in neuroprotection and aging

Project description:Using RNA-seq, 39 cerebral cortex RNA samples were sequenced. The study design was as follows: Ad libitum fed rats at 6 months (n=3, 6 individuals pooled), 12 months (n=3, 6 individuals pooled) and 28 months (n=3, 6 individuals pooled). Calorie restricted rats at 6 months (n=3, 6 individuals pooled), 12 months (n=3, 6 individuals pooled) and 28 months (n=3, 6 individuals pooled). Rats fed alpha lipoic acid as a supplement to ad libitum at 12 months (n=3, 6 individuals pooled) and 28 months (n=3, 6 individuals pooled). Diet switching groups, where diet was changes at 12 months; 28 month ad libitum switched to calorie restriction (n=3, 6 individuals pooled), 28 month calorie restriction switched to ad libitum (n=3, 6 individuals pooled), 28 month ad libitum plus lipoic acid switched to calorie restriction (n=3, 6 individuals pooled), 28 month calorie restriction switched to ad libitum plus lipoic acid (n=3, 6 individuals pooled). Transcriptional profiling of the ageing cerebral cortex at 6, 12 and 28 months and the effect of diet on age and longevity, using carlorie restriction and alpha lipoic acid supplementation

2015-11-22 | E-GEOD-57110 | biostudies-arrayexpress

A Quantitative Yeast Aging Proteomics Analysis Reveals Novel Aging Regulators

Project description:Extending lifespan from yeast to mammals, calorie restriction (CR) is the most conserved longevity intervention. Numerous conserved pathways regulating aging and mediating CR have been identified; however, the overall proteomic changes during these conditions remain largely unexplored. We compared proteomes between young and replicatively aged yeast cells under normal and CR conditions using SILAC quantitative proteomics and discovered distinct signatures in the aging proteome. We found remarkable similarities between aged and CR cells, including induction of stress response pathways, providing evidence that CR pathways are engaged in aged cells. These observations also uncovered aberrant changes in mitochondria membrane proteins as well as a proteolytic cellular state in old cells. These proteomics analyses also help identify potential genes and pathways that have causal effects on longevity.

2022-02-15 | PXD018917 | Pride

Expression data from dietary restricted budding yeast

Project description:Dietary restriction (also known as caloric/calorie restriction; CR) extends the lifespan of species from all three eukaryotic kingdoms. The restriction of the diet interferes directly with the aging process by triggering a tightly controlled genetic program where specific sets of genes are either upregulated downreguled. We used microarray-technology to detail the global program of gene expression underlying the anti-aging effect of dietary restriction and identified distinct classes of up- and down-regulated genes. In order to apply dietary restriction in budding yeast we cultured cells on a reduced glucose medium (0.5% vs. 2.0%), which is known as moderate DR regimen. We then compared mRNA expression of yeast cells cultured under dietary restricted (0.5% glucose) and ad libitum (2.0% glucose) conditions.

2012-06-20 | E-GEOD-38635 | biostudies-arrayexpress

Transcription profiling of skeletal muscles from young, old, and old calorie restricted C57BL/6NHsd mice to investigate age-related changes in the transcriptional profile

Project description:We investigated age-related changes in the transcriptional profile of skeletal muscle in 5 month old (young) and 25 month old (old) C57BL/6NHsd mice using high density oligonucleotide arrays (22,690 transcripts probed). We identified 712 transcripts that are differentially expressed in young (5 month old) and old (25-month old) mouse skeletal muscle. Caloric restriction (CR) completely or partially reversed 87% of the changes in expression. Examination of individual genes revealed a transcriptional profile indicative of increased p53 activity in the older muscle. To determine whether the increase in p53 activity is associated with transcriptional activation of apoptotic targets, we performed RT-PCR on four well known mediators of p53-induced apoptosis: puma, noxa, tnfrsf10b and bok. Expression levels for these proapoptotic genes increased significantly with age (P<0.05), while CR significantly lowered expression levels for these genes as compared to control fed old mice (P<0.05). Age-related induction of p53-related genes was observed in multiple tissues, but was not observed in SOD2+/- and GPX4+/- mice, suggesting that oxidative stress does not mediate the observed age-related increase in expression. Western blot analysis confirmed that protein levels for both p21 and GADD45a, two established transcriptional targets of p53, were higher in the older muscle tissue. These observations support a role for p53-mediated apoptotic activity in mammalian aging. Experiment Overall Design: Animals were killed by cervical dislocation. Five different animals were used for each experimental group. All collected gastrocnemius tissue was then dissected, placed in a microcentrifuge tube, flash-frozen in liquid nitrogen, and stored at -80°C until processed for microarrays.

2007-11-13 | E-GEOD-6323 | biostudies-arrayexpress

Comparison between calorie-restricted and time-restricted without calorie restriction

Project description:Recently, it has been shown that fasting for a portion of each day has metabolic benefits, and promotes lifespan. These findings complicate the interpretation of rodent CR studies, which typically feed the animals only once per day; as they rapidly consume their food, such a regimen collaterally imposes fasting.

2021-08-16 | GSE168262 | GEO

Normal Calorie Restricted

Project description:Normal female Ames mouse (+/+ or +/df) with ad libitum access to water and fed 30% less of the standard pelleted diet with respect to the amount consumed by normal female ad libitum fed +/+ and +/df mice (LabDiet, PMI Feeds, Inc., St Louis, MO) caged with microisolator filter tops. Mice were killed between 24 to 26 months of age, tissues removed, rapidly frozen on dry ice, and stored in liquid nitrogen. Total liver RNA was isolated from frozen tissue as described (T. Tsuchiya, J.M. Dhahbi, X. Cui, P.L. Mote, A. Bartke, S.R. Spindler, Physiological Genomics, Submitted). mRNA levels were measured using the Affymetrix mouse U74Av2 array according to standard protocols. After hybridization, arrays were scanned using a Hewlett-Packard GeneArray Scanner. Image analysis was performed as described (Cao SX, Dhahbi JM, Mote PL, and Spindler SR. Genomic profiling of short- and long-term caloric restriction effects in the liver of aging mice. Proc Natl Acad Sci U S A 98: 10630-10635, 2001). A more detailed description of the methods can be found in (T. Tsuchiya, J.M. Dhahbi, X. Cui, P.L. Mote, A. Bartke, S.R. Spindler, Physiological Genomics, Submitted). Keywords = Ames dwarf Keywords = mouse Keywords = Affymetrix Keywords = caloric restriction Keywords: parallel sample

2008-03-19 | GSE1089 | GEO

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