Project description:Compare miRNA expression profiles in epididymal white adipose tissue (WAT), interscapular brown adipose tissue (BAT) and skeletal muscle from wild-type C57BL/6J mice
Project description:Fasting is the process of metabolic adaption to food deprivation that is taking place in most organisms, e.g. during the daily resting phase in mammals. Furthermore, in biomedical research fasting is used in most metabolic studies to synchronize nutritional states of study subjects. Because there is a lack of standardization for this procedure, we need a deeper understanding of the dynamics and the molecular players in fasting. In this study we investigated the transcriptome signature of white adipose tissue, liver, and skeletal muscle in 24 hours fasted mice (and chow fat controls) using Affymetrix whole-genome microarrays. Food was withdrawn from the fasting group at the beginning of the light phase (9 a.m.) when mice are in their inactive phase. Mice were sacrificed 24 hours later by cervical dislocation. Chow-fed controls had ad libitium access to food during this time. Edidymal white adipose tissue, liver, and skeletal muscle were dissected out, shock frozen in liquid nitrogen and stored at -80°C.
Project description:Fasting is the process of metabolic adaption to food deprivation that is taking place in most organisms, e.g. during the daily resting phase in mammals. Furthermore, in biomedical research fasting is used in most metabolic studies to synchronize nutritional states of study subjects. Because there is a lack of standardization for this procedure, we need a deeper understanding of the dynamics and the molecular players in fasting. In this study we investigated the transcriptome signature of white adipose tissue, liver, and skeletal muscle in 24 hours fasted mice (and chow fat controls) using Affymetrix whole-genome microarrays.
Project description:Exon level expression analysis for the physiological aging study data set to analyze the effect of age on alternative splicing in different tissues and age groups of wild-type mice Analysis of the effect of age on alternative splicing (AS) using exon microarrays to interrogate the differential exon usage of the entire genome of aging wild-type male C57BL/6J mice (4- and 18-month-old) in five tissues (skin, skeletal muscle, bone, thymus, and white adipose tissue) and in an additional 28-month-old age group, which allowed for age-related AS analysis of the skin, skeletal muscle and bone tissues. We found AS genes with age in all tissue, we show that the number of AS genes increased with age and that AS genes across all tissues are involved in RNA processing. Note: This dataset is one of the 2 datasets in the overall study. An additional data set series is available with exon expression analysis of HGPS mice to analyze the effect of progerin expression on alternative splicing. The two datasets are linked together in the SuperSeries GSE67289. A link to the SuperSeries is available at the bottom of this page. 65 tissue samples from wild-type male C57BL/6J mice; from 5 different tissues (ventral skin, skeletal muscle, bone, muscle, and white adipose tissue) and from 3 different age groups: 4, 18 and 28 months (for skin skeletal muscle and bone ) and from 2 different age groups: 4 and 18 months (for ventral skin, skeletal muscle, bone, thymus and white adipose tissue)
Project description:Beneficial effects have been reported in individuals undergoing fasting to treat excessive weight gain and obesity. To better understand the effects of starvation on the transcriptome and lipid metabolism of white adipose tissue, we established a mouse model of 24-hour fasting using wild type C57BL/6J mice, and performed RNA-seq analysis of the white adipose tissue from the epididymis of fasted mice and control mice. Compared with the control fed mice, these fasted mice showed suppressed lipid synthesis and inhibited insulin signaling, while the lipolysis and gluconeogenesis were enhanced to maintain blood sugar stability. Specifically, the fasted mice had reduced volume of adipose tissues, increased levels of serum NEFA and ANP. In epididymal white adipose tissue, starvation increased the NEFA content, up-regulated the mRNA levels of Atgl, Adrb2, Anp, and Npr1, and promoted the phosphorylation of Hsl. Notably, bioinformatics analysis of the RNA-seq data showed that 24-hour fasting-induced alterations in lipid metabolism was associated with suppressed AMPK signaling and enhanced PPAR signaling in white adipose tissue, which was verified by quantitative PCR. Collectively, these findings supported that starvation promoted the conversion of energy-supplying substrates from glucose to fat. Our work sheds new light on harnessing the plasticity of adipose tissues and the AMPK/PPAR signaling pathways to develop potential strategies to combat obesity and other glucose/lipid metabolisms-associated human diseases.
Project description:A control group of male C57BL/6J mice were fed a 60% fat diet (Research Diets D12492i) for 8 weeks, resulting in “ad libitum obesity” (ALO). Leptin receptor-deficient B6.BKS(D)-Leprdb/J (“db/db”) male mice were fed a low-fat chow diet (PicoLab Rodent Diet 20; Purina Mills Inc). Once the average body weights of the two groups were equivalent, all mice were fasted for 24 hours, after which they were sacrificed and perigonadal adipose tissue (PGAT) was dissected out. PGAT was cultured ex vivo for 6 hours, after which conditioned media was collected and submitted for proteomic profiling. At the time of sacrifice, ALO mice were 17 weeks old and db/db mice were 10 weeks old. “HFD” is also used to refer to the ALO condition while “DB” is used to refer to the “db/db” condition.
Project description:We asked if miRNAs are involved in PRDM16 protein expression. Thus microarray was employed with inguinal adipose tissues from contol, fasted and cold exposure C57BL/6J male mice In this dataset, we include all the miRNA expression data obtained from dissected mouse inguinal adipose tissues from control, fasted and cold exposure mice.
Project description:Investigate the effects loss of skeletal muscle Bmal1 has on systemic transcriptomes +/- exercise training. Mouse liver, heart, white adipose and lung tissues were collected 47 hours post their last exercise bout, with or without 6-weeks of daily treadmill training. +/- Skeletal muscle Bmal1
Project description:Although mitochondrial dysfunctions are implicated in the pathogenesis of obesity, the molecular mechanisms underlying obesity-related metabolic abnormalities are still not well established. To acquire a comprehensive picture of mitochondrial molecular changes within metabolically active tissues, we focused on hepatic and muscle whole cellular transcriptome and mitochondrial proteome alterations in 16 and 48 weeks old high fat diet (HFD)-feed wild type C57BL/6J and hyperphagic, genetically modified mice with leptin dysfunction (ob/ob and db/db). On transcriptome level, the most discriminative hepatic alterations distinguished between genetically modified and wild type mice, and between overnight fasted and non-fasted mice, while the muscle transcriptional alterations related mainly to the fasting state. The fractions of uniquely different proteins were consistently higher in hyperphagic than in HFD-fed mice and in fasted than non-fasted mice . The liver samples revealed overall higher number of differentially expressed RNAs and proteins than muscle samples. Differentially expressed genes and proteins in the liver, but not in the muscle, could be assigned to several Gene Ontology terms, including oxidation-reduction and several metabolic processes. Thus, altered expression of genes and proteins accompanied the state of obesity and was quantitatively different in the liver and muscle. Our parallel microarray- and quantitative mitochondrial mass spectrometry-based study performed on hepatic and muscle samples identified a higher number of differentially expressed proteins than any other studies investigating obesity-related proteomes. However, even with our integrated transcriptomic and proteomic approach still many details and dynamics of a chain of metabolic events leading to obesity-related mitochondrial dysfunctions remain unresolved . 48 samples each of liver and muscle (total samples: 96). Samples splitted equally according to 3 criterions: age (24 young/24 old), fasting status (24 fasted/24 non fasted), and strain+diet (12 each: B6.V-Lep ob/J+D12450B, B6.BKS(D)-Lep rdb/J+D12450B, C57BL/6J+D12450B, C57BL/6J+D12492). Overall 3 replicates for each strain+diet/age/fasting_status combination. Low fat diet = D12450B; high fat diet = D12492.
Project description:Experiment designed to identify differences in gene expression profile in white adipose tissue upon stimulation by beta 3 adrenergic receptor agonist. This series compares 2 groups of C57BL/6J acutely treated with CL-316,243 or Saline for 3 hours. Keywords: parallel sample