Expression data from tibialis anterior muscle of mice with or without treatment of dexamethasone and/or tumeric extract
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ABSTRACT: Sarcopenia is the decline in skeletal muscle mass, strength, and functions, which decreases the quality of life in elderly people. This study investigated the suppressive effect of turmeric (Curcuma longa) extract (TE) on muscle atrophy in dexamethasone (DEX)-treated mice and C2C12 myotubes. DEX treatment significantly decreased the muscle weight and significantly increased Fbxo32 and Murf1 expression in mice, and these changes were suppressed by the supplementation of an AIN-93 based diet with 2% TE. A similar pattern was observed in FBXO32 and MuRF1 protein expression. In C2C12 myotubes, DEX treatment significantly increased FBXO32 and MuRF1 gene and protein expression, and these increases were significantly suppressed by TE supplementation at a concentration of 200 µg/ml. Furthermore, one of the five TE fractions, which were separated by high-performance liquid chromatography had a similar effect with TE supplementation. The present study proposes the suppressive effect of turmeric on sarcopenia.
Project description:Analysis of C2C12 myotubes treated with dexamethasone (Dex) for 6 or 24 hours. Dex is a synthetic glucorticoid receptor agonist. Results provide insight to the effect of glucocorticoids on myotubes.
Project description:This study aimed to observe the effect of gRc on C2C12 myotubes under resting state and DEX treatment to indentify the transcript expression induced by gRc in the C2C12 myotubes.
Project description:Analysis of C2C12 myotubes treated with dexamethasone (Dex) for 6 or 24 hours. Dex is a synthetic glucorticoid receptor agonist. Results provide insight to the effect of glucocorticoids on myotubes. C2C12 myotubes were cultured in DMEM supplemented with 2% horse serum, and treated with 1 u? Dex or an equal volume (0.01% v/v of media) of vehicle control ethanol for 6 or 24 hours. Total cellular RNA was isolated utilizing the NucleoSpin RNA II kit (Macherey-Nagel). RNA isolates were first quantified by standard spectrophotometry, and then qualitatively evaluated by capillary electrophoresis employing the Bio-Rad Experion system per manufacturer’s instruction. The final labeled cRNA samples were hybridized overnight to Illumina mouseWG-6 BeadChip arrays, which was performed at UCSF Genomic Core. All treatments were done in triplicates and the same batch of microarrays were used for all treatments. The Illumina expression arrays were pre-processed using lumi package. The differential expression analysis was performed using the Limma package.
Project description:Sarcopenia represents an important health challenge with reduced quality of life and increased mortality. Gut microbiota have been suggested to contribute to this age-associated muscle wasting but the underlying mechanisms are still unclear. We uncovered the quorum sensing peptide iAM373 as a hitherto unknown contributor to sarcopenia. The involved pathways resulting in a decreased muscle metabolism were explored by RNA sequencing of C2C12 and human myotubes after treatment with iAM373 or placebo. Gene-set enrichment analysis (GSEA) with terms from Gene ontology (GO) biological processes, and KEGG, Biocarta and Reactome canonical pathways revealed an enrichment in gene sets involved in striated muscle development and differentiation in iAM373 treated samples. Most of these gene sets were downregulated by iAM373. The proteasome degradation pathway was also enriched, i.e., upregulated in murine and human myotubes after QSP incubation.
Project description:To investigate differentially expressed lncRNAs in C2C12 myotubes with/without CoCl2 treatment, we used mouse lncRNA microarray to examine the expression of lncRNAs in C2C12 myotubes and C2C12 myotubes with CoCl2 treatment.
Project description:To investigate differentially expressed circRNAs in C2C12 myotubes with/without CoCl2 treatment, we used mouse circRNA microarray to examine the expression of circRNAs in C2C12 myotubes and C2C12 myotubes with CoCl2 treatment.
Project description:To evaluate transcriptomic changes induced by in vitro exercise, we established two in vitro exercise models; EPS (electrical pulse stimulation and clenbuterol treatment). As for clen-buterol treatment, differentiated C2C12 myotubes were treated by 30 ng/ml clenbuterol for 1 hour and control and clenbuterol treated C2C12 myotubes were analyzed by RNA-sequencing. As for an EPS model, EPS was applied to differentiated C2C12 myotubes for 24 hours and control and EPS applied C2C12 myotubes were analyzed by RNA-sequencing.
Project description:Proliferating C2C12 myoblasts were induced to differentiate into myotubes and then infected with adenovirus expressing E1A (Ad-E1A), which induces cell cycle re-entry and dedifferentiation. We analyzed the transcriptional profile of E1A infected C2C12-myotubes through the Affymetrix Mouse Genome 430 2.0 Array, searching for genes that were significantly regulated between two independent biological replicates at two different time points (24h and 36h after infection with Ad-E1A). In addition, we took advantage of the E1A mutant known as YH47/dl928 (hereafter referred as YH47), which bears two mutations in the pocket-binding region of E1A (Y48H, C124G) able to disrupt the interaction with Rb and its cognate proteins and to impair cell-cycle re-entry phenotype. YH47 mutant was used to identify the Rb independent transcriptional reprogramming of C2C12. C2C12 cells were differentiated in vitro to myotubes as previously described. Myotubes were, then, infected with an adenovirus carrying the 12S form of E1A (dl520), with the YH47 E1A mutant (dl928) or with a control adenovirus (CTR) expressing a deletion of essentially the entire E1A gene (dl312). Two different time points after infection were considered (24 hours and 36 hours) to evaluate changes in C2C12 cells expression profile. Technical (A or B) and biological replicates (EXP1 or EXP2) were done for each condition.
Project description:To determine the lncRNA expression profile in C2C12 myoblasts and myotubes, we used mouse lncRNA microarray from Arraystar to examine the expression of lncRNAs in C2C12 myoblasts and myotubes.
Project description:To determine the circRNA expression profile in C2C12 myoblasts and myotubes, we used mouse circRNA microarray from Arraystar to examine the expression of circRNAs in C2C12 myoblasts and myotubes.