Analysis of gastrocnemius muscle from chow-fed control and skeletal muscle specific Cpt1b knockout mice
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ABSTRACT: To determine the transcriptomic effects of Cpt1b loss on skeletal muscle gene expression, we assessed gastrocnemius muscle in chow-fed control and Cpt1b skeletal muscle specific knockout mice using a serial analysis of gene expression strategy. Complementary bioinformatics pathway enrichment studies were performed which indicated that differentially expressed genes between genotypes were predominantly related to various processes include carbohydrate metabolism, lipid metabolism, amino acid metabolism, cell proliferation, and apoptosis.
Project description:To determine the effects of 10 weeks of voluntary wheel running on skeletal muscle gene expression in mice with and without skeletal muscle HuR knockout, we assessed gastrocnemius muscle in chow-fed control and skeletal muscle HuR knockout mice using RNA-seq
Project description:To determine the transcriptomic effects of cold exposure on skeletal muscle gene expression in rats with and without UCP1, we assessed gastrocnemius muscle in chow-fed control and whole body UCP1 knockout rats using RNA-seq.
Project description:To determine the effects of cold exposure on skeletal muscle gene expression in rats with and without UCP1, we assessed gastrocnemius muscle in chow-fed control and whole body UCP1 knockout rats using RNA-seq.
Project description:The processes by which mitochondria respond to cellular energy demands brought on by physiologic and pathophysiologic stimuli are essential to cellular adaptation and organismal survival. Disrupted mitochondrial function is implicated in several human disease states, underscoring the need to elucidate the molecular mechanisms that control mitochondrial function and metabolism. We previously described a patient with a gain-of-function mutation in Site-1 Protease (S1P) who exhibited idiopathic hyperCKemia, myoedema, and altered muscle mitochondrial morphology. To date, S1P has been heavily characterized in liver and bone, with very little known about its potential function in skeletal muscle. In our current study, we generated a skeletal muscle-specific S1P knockout mouse line (S1PsmKO) to examine the role of S1P in skeletal muscle. S1PsmKO mice were overtly normal in their appearance and health. However, examination of 12-week-old S1PsmKO mice showed increased gastrocnemius muscle mass and aged S1PsmKO mice exhibited increased muscle mass in both gastrocnemius and soleus relative to age-matched controls. Moreover, isolated muscle from S1PsmKO exhibited increased maximal mitochondrial respiration relative to floxed littermates (controls). RNA-Seq analysis showed increased transcript numbers of the mitochondrial-resident gene, Mss51 in S1PsmKO gastrocnemius relative to control mice. Mss51 is a member of the TGF-β/MSTN pathway, which controls mitochondrial metabolism. Similar to S1PsmKO muscle, S1P-depleted C2C12 cells also had increased maximal respiration, which was reversed by exogenous MSS51 expression. These data identify S1P as a regulator of muscle mass and mitochondrial metabolism, and implicate S1P as a novel modulator of TGF-β signaling. Method: Male mice were maintained on standard chow diet until 12 weeks of age.
Project description:MuRF1 is an E3 ubiquitin ligase known to play a role in skeletal muscle atrophy. Our objectives in this study were to gain further insight into the roles MuRF1 plays in skeletal muscle and to determine if this is influenced by sex and/or consumption of a high fat diet. To address these objectives we used RNA sequencing to analyze the transcriptome of gastrocnemius muscle from 30 week old, MuRF1 knockout (-/-) and wild type, male and female mice fed a chow or high fat diet (HFD).
Project description:Analysis of gastrocnemius muscle transcriptome from chow fed control and skeletal muscle HuR knockout mice with and without voluntary wheel running
Project description:Study identifying transcriptional differences present between C57BL/6J and B6;129-Gaatm1Rabn/J mice, or driven by Enzyme Replacement Therapy (ERT), Substrate Reduction Therapy (SRT), or Both, administered to the mutant strain. All expression profiles were assessed in bulk gastrocnemius muscle collected from 18-21 week-old mice that had been provided with chow formulated with vehicle (veh.), MZ-101 (SRT), or alglucosidase alfa 20mg/kg biweekly (ERT) for 12 weeks.
Project description:Transcript data from quadriceps skeletal muscle from fasted-state male BXD strains on Quadriceps, Chow or Quadriceps, High fat diet We used microarrays to compare the skeletal muscle expression differences across males in the BXD strain family and across two diverse diets