Expression profiling of the effect of high-fat diet, low-fat diet, CR and exercise on mice liver
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ABSTRACT:
ORGANISM(S): Mus musculus
PROVIDER: GSE36838 | GEO | 2012/03/28
SECONDARY ACCESSION(S): PRJNA156989
REPOSITORIES: GEO
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Project description:Dietary interventions are effective ways to extend or shorten lifespan. By examining midlife hepatic gene expressions in mice under different dietary conditions, which resulted in different lifespans and aging-related phenotypes, we were able to identify genes and pathways that modulate the aging process. We found that pathways transcriptionally correlated with diet-modulated lifespan and physiological changes were enriched for lifespan-modifying genes. Male C57BL/6J mice at 4 weeks of age were purchased from Shanghai Animal Co, Ltd. Mice were maintained under a 12-hour dark/light cycle (lights on at 6:30 am) at a temperature of 22 ± 3 °C in accredited animal facilities. Prior to the start of experiment, mice were maintained on a low-fat diet (Research Diets Inc., New Brunswick, NJ) for one week. At the age of 5 weeks, animals were randomly assigned to one of the 6 intervention groups (n = 30 for each group): feeding of a low-fat diet (10% fat, D12450B, Research Diets) ad libitum (LF) or with 30% calorie restriction (LF+CR) or with voluntary running exercise (LF+Ex), feeding of a high-fat diet (60% fat, D12492, Research Diets) ad libitum (HF) or with 30% calorie restriction (HF+CR) or with voluntary running exercise (HF+Ex). All mice were housed individually during the study. The daily consumption of food in LF and HF groups was recorded over a week and averaged to determine the amount of food for the following week for the LF+CR and HF+CR groups, respectively. After 1 week acclimation in cage with the locked running wheels, mice in the LF+Ex and HF+Ex groups were allowed free access to a running wheel, and the running distance and time were recorded automatically by the equipment. The hepatic transcriptional level for 3 mice from each intervention group at 62 weeks of age was analyzed using Affymetrix Mouse Genome 430 2.0 Arrays.
2012-03-27 | E-GEOD-36838 | biostudies-arrayexpress
Project description:Dietary interventions are effective ways to extend or shorten lifespan. By examining midlife hepatic gene expressions in mice under different dietary conditions, which resulted in different lifespans and aging-related phenotypes, we were able to identify genes and pathways that modulate the aging process. To determine how our dietary intervention-based transcriptomic approach for predicting aging-regulatory genes compares to more traditional approach of using age-dependent transcriptional changes, we examined the hepatic gene expression changes in LF-fed mice during aging at 4, 8, 13 and 21 months.
2012-03-28 | GSE36836 | GEO
Project description:Dietary interventions are effective ways to extend or shorten lifespan. By examining midlife hepatic gene expressions in mice under different dietary conditions, which resulted in different lifespans and aging-related phenotypes, we were able to identify genes and pathways that modulate the aging process. To determine how our dietary intervention-based transcriptomic approach for predicting aging-regulatory genes compares to more traditional approach of using age-dependent transcriptional changes, we examined the hepatic gene expression changes in LF-fed mice during aging at 4, 8, 13 and 21 months. Male C57BL/6J mice at 4 weeks of age were purchased from Shanghai Animal Co, Ltd. Mice were maintained under a 12-hour dark/light cycle (lights on at 6:30 am) at a temperature of 22 ± 3 °C in accredited animal facilities. Prior to the start of experiment, mice were maintained on a low-fat diet (Research Diets Inc., New Brunswick, NJ) for one week. Liver RNAs extracted from six male C57BL/6J mice of the same age were pooled at each age point to obtain an average microarray profile at 4, 8, 13 and 21 months.
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Project description:Resveratrol delays age-related deterioration and mimics transcriptional aspects of dietary restriction without extending lifespan A small molecule that safely mimics the ability of dietary restriction (DR) to delay age-related diseases in laboratory animals is greatly sought after. We and others have shown that resveratrol mimics effects of DR in lower organisms. In mice, we find that resveratrol induces gene expression patterns in multiple tissues that parallel those induced by DR and every-other-day feeding. Moreover, resveratrol-fed elderly mice shows a marked reduction in signs of aging including reduced albuminuria, decreased inflammation and apoptosis in the vascular endothelium, increased aortic elasticity, greater motor coordination, reduced cataract formation, and preserved bone mineral density. However, mice fed a standard diet did not live longer when treated with resveratrol beginning at mid-life. Our findings indicate that resveratrol treatment has a range of beneficial effects in mice but does not increase the longevity of ad libitum-fed animals when started mid-life. Male C57BL/6NIA mice at 11 months of age were maintained on a standard purified mouse diet (AIN-93G) for one month prior to the start of the experiment. Beginning at one year of age, SD and EOD groups were fed a standard AIN-93G diet or AIN-93G plus 0.01% or 0.04% resveratrol for the duration of the study. Three separate groups were placed on an HC diet (AIN-93G modified by the addition of hydrogenated coconut oil to provide 60% of calories from fat) or HC + 0.01% or 0.04% resveratrol 6 weeks later and remained on those diets throughout the study. SD and HC mice were fed ad libitum. EOD mice were fed ad libitum on alternate days then moved to a separate cage without food for 24 h. Food intake and body weight were measured on a weekly basis for the duration of the study.
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