Unknown,Transcriptomics,Genomics,Proteomics

Dataset Information

Affymetrix GeneChip Mouse Gene 1.0 arrays of RNA extracted from gastrocnemius muscle of 4 global Ppp3cb KO mice and 4 corresponding WT littermates, and 4 skeletal muscle-specific Ppp3r1Mlc1fCre KO and 4 corresponding WT littermates.

ABSTRACT: Global deficiency of catalytic subunit Ppp3cb, and tissue-specific ablation of regulatory subunit Ppp3r1 from skeletal muscle but not adipose tissue or liver led to protection from high-fat diet induced obesity and comorbid sequelæ. Ser637 hyperphosphorylation of dynamin-related protein 1 (Drp1) in skeletal muscle of calcineurin-deficient mice was associated with mitochondrial elongation into power-cable shaped filaments, increased mitochondrial respiration, but attenuated exercise performance. Mice used for microarray analyses were all male, and chronically exposed to HFD for at least 8 weeks.

ORGANISM(S): Mus musculus

SUBMITTER: Bruce Aronow

PROVIDER: E-GEOD-71174 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Project description:Maternal obesity can program metabolic syndrome in offspring but the mechanisms are not well characterized. Moreover, the consequences of maternal overnutrition in the absence of frank obesity remain poorly understood. This study aimed to determine the effects of maternal consumption of a high fat-sucrose diet on the skeletal muscle metabolic and transcriptional profiles of adult offspring. Female Sprague Dawley rats were fed either a diet rich in saturated fat and sucrose (HFD, 23.5% fat, 20% sucrose wt/wt) or a standard chow diet (NFD, 7% fat, 10% sucrose w/w) for the 3 weeks prior to mating and throughout pregnancy and lactation. Although maternal weights were not different between groups at conception or weaning, HFD dams were ~22% heavier than chow fed dams from mid-pregnancy until 4 days post-partum. Adult male offspring of HFD dams were not heavier than controls but demonstrated features of insulin resistance including elevated plasma insulin concentration (+40%, P<0.05). Next Generation mRNA Sequencing was used to identify differentially expressed genes in the soleus muscle of offspring, and Gene Set Enrichment Analysis (GSEA) to detect coordinated changes that are characteristic of a biological function. GSEA identified 15 pathways enriched for up-regulated genes, including cytokine signaling (P<0.005), starch and sucrose metabolism (P<0.017), and inflammatory response (P<0.024). A further 8 pathways were significantly enriched for down-regulated genes including oxidative phosphorylation (P<0.004) and electron transport (P<0.022). Western blots confirmed a ~60% reduction in the phosphorylation of the insulin signaling protein Akt (P<0.05) and ~70% reduction in mitochondrial complexes II (P<0.05) and V expression (P<0.05). On a normal diet, offspring of HFD dams developed an insulin resistant phenotype, with transcriptional evidence of muscle cytokine activation, inflammation and mitochondrial dysfunction. These data indicate that maternal overnutrition, even in the absence of pre-pregnancy obesity can promote metabolic dysregulation and predispose offspring to type 2 diabetes. Messenger RNA profile of skeletal muscle of male offspring from female Sprague Dawley rats fed either a diet rich in saturated fat and sucrose (HFD, 23.5% fat, 20% sucrose wt/wt) or a standard chow diet (NFD, 7% fat, 10% sucrose w/w) for the 3 weeks prior to mating and throughout pregnancy and lactation. There were 5 HFD samples compared to 6 NFD control samples.

Dataset Information

Affymetrix GeneChip Mouse Gene 1.0 arrays of RNA extracted from gastrocnemius muscle of 4 global Ppp3cb KO mice and 4 corresponding WT littermates, and 4 skeletal muscle-specific Ppp3r1Mlc1fCre KO and 4 corresponding WT littermates.

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