Sex differences in the effects of caloric restriction (CR) on hepatic gene expression in mice
Ontology highlight
ABSTRACT:
ORGANISM(S): Mus musculus
PROVIDER: GSE230402 | GEO | 2023/04/26
REPOSITORIES: GEO
Similar Datasets
Project description:We recruited ten normal-weight healthy men using inclusion criteria as previously described (Collet et al 2017). All males were healthy and not obese or overweight (average age: 23.8 years, average BMI (kg/m2): 23.3). Participants at baseline consumed a balanced diet (50% carbohydrate, 30% fat, and 20% protein). During caloric restriction, volunteers consumed 10% of normal energy requirement (226 kcal/d) for two days, again balanced (50% carbohydrate, 30% fat, and 20% protein), with the same macronutrient composition. After caloric restriction, volunteers were offered three substantial ad libitum buffet meals per day (20 MJ = 4,777 kcal) and additional snacks (16 MJ = 3,821 kcal) between meals for 2 days. They were invited to eat freely until comfortably full; food consumption was covertly measured. We collected fasting plasma samples at 0800 AM at baseline, after CR and refeeding (RF).
2022-12-12 | PXD038526 | Pride
Project description:Plasma proteomic of cynomolgus monkeys by caloric restriction (CR)
2024-11-27 | PXD058298 |
Project description:OBJECTIVE: To understand the molecular pathways underlying the cardiac preconditioning effect of short-term caloric restriction (CR). BACKGROUND: Lifelong CR has been suggested to reduce the incidence of cardiovascular disease through a variety of mechanisms. However, prolonged adherence to a CR life-style is difficult. Here we show how short-term CR protects the mouse heart from ischemia. METHODS: Male 10-12 wk old C57bl/6 mice were randomly assigned to an ad libitum (AL) diet with free access to regular chow, or CR, receiving 30% less food over a period of 7 days (d), prior to myocardial infarction (MI) via permanent coronary ligation. Prior to MI (d8), the left ventricles (LV) of AL and CR mice were collected for Western blot, DNA and microRNA (miR) analyses. In separate groups, infarct size, cardiac hemodynamics and protein abundance of caspase 3 was measured at d2 post-MI. RESULTS: This short-term model of CR was associated with cardio-protection, as evidenced by decreased infarct size (18.5±2.4% vs. 26.6±1.7%, N=10/group; P=0.01). cDNA and miR profiles pre-MI (N=5/group) identified genes modulated by short-term CR to be associated with circadian clock, oxidative stress, immune function, apoptosis, metabolism, angiogenesis, cytoskeleton and extracellular matrix (ECM). Western blots pre-MI revealed CR-associated increases in phosphorylated Akt and GSK3ß, reduced levels of phosphorylated AMPK and mitochondrial related proteins PGC-1?, cytochrome C and cyclooxygenase (COX) IV, with no differences in the levels of phosphorylated eNOS or MAPK (ERK1/2; p38). CONCLUSIONS: Short-term CR for only 7d represents a preconditioning strategy that limits infarct size. It is associated with a unique gene and miR signature, including the activation of specific pro-survival kinases. These findings may have implications for therapeutic use of short-term CR. . Male 12 wk-old C57Bl/6 mice were obtained from Charles River (Montreal, PQ, Canada) and maintained for at least 2 weeks before experimentation. Animals were randomly assigned to AL, CR and Lira groups with no initial differences in body weights. AL group mice were allowed ad libitum diet. Lira group mice were injected with Liraglutide (Glucagon-like peptide-1 agonist) at a dose of 200 µg/Kg i.p., twice daily for 7 days which is a mild weight-loss inducing dose and had access to ad libitum food and water. CR group mice were put on a Caloric restriction diet (30% less than normal ad libitum caloric intake) for 7 days to induce weight loss comparable to Lira group mice. Mice for CR and AL were individually caged and their food intake was measured everyday between 10-11 am for 1 week to calculate the average daily food intake. CR mice were fed 30% less than the calculated mean daily AL food consumption. CR cages were inspected daily for any remaining food, and transferred to a new cage every day. For CR group, pre-weighed mouse chow pellets were placed in cages between 10-11 am every day. Body weights were recorded between 10-11 am before and after the 7 day study period. For pre-ischemic assessments, animals (n=5/group/assessment) were sacrificed on day-8 (pre-MI), hearts were immediately extracted, washed in sterile phosphate-buffered saline (PBS), with LV free walls dissected, snap frozen in liquid nitrogen and stored at -80o C.
2015-05-08 | E-GEOD-68646 | biostudies-arrayexpress
Project description:This study explored the role of the growth hormone (GH) / insulin-like growth factor 1 (IGF-1) axis on the life-long caloric restriction (CR)-associated remodeling of white adipose tissue (WAT). Adipocyte size and gene expression profiles, using high-density oligonucleotide microarrays, were analyzed in WAT of six- to seven-month old wild Wistar rats fed ad libitum (AL) or subjected to a 30% caloric restriction (CR), and heterozygous transgenic dwarf rats bearing an anti-sense GH transgene fed ad libitum (Tg). While not significant in Tg rats, adipocyte size was significantly reduced in CR rats compared with AL rats. The microarray data based on the principal component analysis demonstrated that the gene expression profile of CR rats markedly differed from the AL rats, while Tg hardly differed, suggesting that CR-associated WAT remodeling was predominantly regulated in a GH/IGF-1-independent manner. The gene cluster with the largest change induced by CR included several genes involved in lipid biosynthesis and inflammation. Moreover, many of the genes transcriptionally regulated by sterol regulatory element binding proteins (SREBPs) were found in the cluster related to lipid biosynthesis. Real-time reverse transcription polymerase chain reaction analysis confirmed that the expression of SREBP-1 and its down-stream targets was particularly up-regulated in CR rats compared with SREBP-2 and its down-stream targets. Our findings suggest that SREBP-1 is a major transcription factor in CR-associated remodeling of WAT, and might be one of the key regulators of the anti-aging and pro-longevity effects of CR. The three groups: GH antisense, caloric restriction, and the control were compared by using PCA.
2012-09-27 | E-GEOD-30668 | biostudies-arrayexpress
Project description:This study explored the role of the growth hormone (GH) / insulin-like growth factor 1 (IGF-1) axis on the life-long caloric restriction (CR)-associated remodeling of white adipose tissue (WAT). Adipocyte size and gene expression profiles, using high-density oligonucleotide microarrays, were analyzed in WAT of six- to seven-month old wild Wistar rats fed ad libitum (AL) or subjected to a 30% caloric restriction (CR), and heterozygous transgenic dwarf rats bearing an anti-sense GH transgene fed ad libitum (Tg). While not significant in Tg rats, adipocyte size was significantly reduced in CR rats compared with AL rats. The microarray data based on the principal component analysis demonstrated that the gene expression profile of CR rats markedly differed from the AL rats, while Tg hardly differed, suggesting that CR-associated WAT remodeling was predominantly regulated in a GH/IGF-1-independent manner. The gene cluster with the largest change induced by CR included several genes involved in lipid biosynthesis and inflammation. Moreover, many of the genes transcriptionally regulated by sterol regulatory element binding proteins (SREBPs) were found in the cluster related to lipid biosynthesis. Real-time reverse transcription polymerase chain reaction analysis confirmed that the expression of SREBP-1 and its down-stream targets was particularly up-regulated in CR rats compared with SREBP-2 and its down-stream targets. Our findings suggest that SREBP-1 is a major transcription factor in CR-associated remodeling of WAT, and might be one of the key regulators of the anti-aging and pro-longevity effects of CR.
2012-09-27 | GSE30668 | GEO
Project description:16 rats were mated and the dams continued pregnancy (controls) or were subsequently caloric restricted (CR) for 20% during days 1-12. Control female/male offspring continued normal lactation, while offspring of CR-treated dams received either normal lactation (CR group) or received during lactation until PN21 leptin supplementation. Leptin treatment of offspring during lactation after caloric restriction of dams during pregnancy reverts CR-induced dysfunction.
2020-09-22 | GSE93150 | GEO
Project description:Characterization of the fecal metaproteome in rats fed ad libitum or following a caloric restriction diet
2018-10-08 | PXD007252 | Pride
Project description:Comparison of transcriptional profiling in murine hearts obtained from the control mice fed ad libitium (AL) and treated with caloric restriction (CR). Comparison of transcriptional profiling in murine hearts obtained from cardiomyocye-specific Sirt1 knockout mice fed ad libitium and treated with caloric restriction.
2016-05-05 | GSE75558 | GEO
Project description:OBJECTIVE: To understand the molecular pathways underlying the cardiac preconditioning effect of short-term caloric restriction (CR). BACKGROUND: Lifelong CR has been suggested to reduce the incidence of cardiovascular disease through a variety of mechanisms. However, prolonged adherence to a CR life-style is difficult. Here we show how short-term CR protects the mouse heart from ischemia. METHODS: Male 10-12 wk old C57bl/6 mice were randomly assigned to an ad libitum (AL) diet with free access to regular chow, or CR, receiving 30% less food over a period of 7 days (d), prior to myocardial infarction (MI) via permanent coronary ligation. Prior to MI (d8), the left ventricles (LV) of AL and CR mice were collected for Western blot, DNA and microRNA (miR) analyses. In separate groups, infarct size, cardiac hemodynamics and protein abundance of caspase 3 was measured at d2 post-MI. RESULTS: This short-term model of CR was associated with cardio-protection, as evidenced by decreased infarct size (18.5±2.4% vs. 26.6±1.7%, N=10/group; P=0.01). cDNA and miR profiles pre-MI (N=5/group) identified genes modulated by short-term CR to be associated with circadian clock, oxidative stress, immune function, apoptosis, metabolism, angiogenesis, cytoskeleton and extracellular matrix (ECM). Western blots pre-MI revealed CR-associated increases in phosphorylated Akt and GSK3ß, reduced levels of phosphorylated AMPK and mitochondrial related proteins PGC-1α, cytochrome C and cyclooxygenase (COX) IV, with no differences in the levels of phosphorylated eNOS or MAPK (ERK1/2; p38). CONCLUSIONS: Short-term CR for only 7d represents a preconditioning strategy that limits infarct size. It is associated with a unique gene and miR signature, including the activation of specific pro-survival kinases. These findings may have implications for therapeutic use of short-term CR. .
2015-05-08 | GSE68646 | GEO
Project description:Purpose: The goal of this study was the transcriptome high-throughput data analysis of spleen cells from mice infected with a virulent strain of mycobacterium (H37rv) and either fed ad libitum (AL) or caloric restricted (CR) Methods: Spleen cell total RNA profile of 17 weeks old mice (1. MTB infected, Ad libitum fed; 2. MTB infected, Caloric restricted; 3. Not infected, Ad libitum fed; 4. Not infected, Caloric restricted; a pool of 5 animals per group) were generated by deep sequencing, in triplicate, using TruSeq Stranded Total RNA Illumina technology Results: Principal component analysis and unsupervised clustering showed that the RNA-seq profiles of spleen cells from these four groups of mice were clearly distinct and infection was the major force affecting gene expression, with 67% of variance coming from the infection status and another 23% variance being dependent on caloric intake . When directly comparing AL versus CR MTB infected spleens, 628 genes were found differentially expressed. Supervised hierarchical clustering based on the expression of these 628 genes was able to unveil the unique transcriptional profile of CR MTB infected mice compared to both AL MTB infected and Not infected mice. Coclusions: Caloric restriction is able to affect the expression of a significant number of genes in spleen cells isolated from mice infected with MTB. The study of biological process enrichements highlights relevant immune-related regulation in these animals, than may be at the base of the higher capacity of caloric restricted, compared to ad libitum fed, animals to resist MTB infection.
2021-01-08 | GSE127263 | GEO