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The effect of age on the skeletal muscle transcriptome during hypertrophy

ABSTRACT: Transcriptome analysis of skeletal muscle during hypertrophic growth in aged mice Global gene expression patterns were determined from microarray results on day 1, 3, 5, 7, 10 and 14 during plantaris muscle hypertrophy induced by synergist ablation in old adult mice (25 months).

ORGANISM(S): Mus musculus

PROVIDER: GSE67160 | GEO | 2015/06/01

SECONDARY ACCESSION(S): PRJNA279140

REPOSITORIES: GEO

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Expression data during plantaris muscle hypertrophy induced by synergist ablation in young adult mice

2013-05-21 | GSE47098 | GEO

Expression data during plantaris muscle hypertrophy induced by synergist ablation in young adult mice

Project description:Global gene expression patterns were determined from microarray results on day 1, 3, 5, 7, 10 and 14 during plantaris muscle hypertrophy induced by synergist ablation in young adult mice (5 months). For each time point, two Affymetrix chips (Mouse Gene 1.0 ST) were used with 100 ng of total RNA derived from a pooled sample of either the right or left plantaris muscles from six animals.

2013-05-21 | E-GEOD-47098 | biostudies-arrayexpress

Expression data during plantaris muscle hypertrophy with/without satellite cells induced by synergist ablation in young adult Pax7-DTA mice

Project description:Global gene expression patterns were determined from microarray results from sham surgery or following 1 week of plantaris muscle hypertrophy induced by synergist ablation in young adult Pax7-DTA mice (4 months). Vehicle treated mice have their full complement of satellite cells; tamoxifen treated mice have had their satellite cells genetically depleted through Cre-loxP technology After sham surgery or 1 week of overload, Affymetrix chips (mouse430_2.0) were used with 1 Âµg of total RNA derived from a pooled sample of the right and left plantaris muscles from 11 animals.

2014-02-20 | E-GEOD-52597 | biostudies-arrayexpress

Senolytics rescue blunted muscle hypertrophy in old mice

Project description:With aging, skeletal muscle plasticity is attenuated in response to exercise. Here, we report that senescent cells, identified using senescence markers senescence-associated β-Galactosidase (SA β-Gal) and p21 are very infrequent in resting muscle but emerge approximately two-weeks after a bout of resistance exercise in humans. We hypothesized that these cells contribute to blunted hypertrophic potential in old age. Using synergist ablation-induced mechanical overload of the plantaris muscle to model resistance training in adult (5-6 month) and old (23-24 month) male C57BL/6J mice, we found increased senescent cells in both age groups during hypertrophy. Consistent with the human data, there were negligible senescent cells in adult and old sham controls, but old mice had significantly more senescent cells 7- and 14-days following overload relative to young. Old mice had blunted whole muscle hypertrophy when compared to adult mice, along with smaller muscle fibers, specifically glycolytic Type 2x+2b fibers. To ablate senescent cells using a hit-and-run approach, old mice were treated with vehicle or a senolytic cocktail consisting of 5 mg/kg dasatinib and 50 mg/kg quercetin (D+Q) on day 7 and 10 during 14-days of overload; control mice underwent sham surgery with or without senolytic treatment. Old mice given D+Q had larger muscles and muscle fibers after 14 days of overload, fewer senescent cells when compared to vehicle-treated old mice, and changes in the expression of genes (i.e., Igf1, Ddit4, Mmp14) that are associated with hypertrophic growth . Our data collectively show that senescent cells emerge in human and mouse skeletal muscle following a hypertrophic stimulus, and that D+Q improves muscle growth in old mice.

2022-05-29 | GSE195707 | GEO

Expression data during plantaris muscle hypertrophy with/without satellite cells induced by synergist ablation in young adult Pax7-DTA mice

2014-02-20 | GSE52597 | GEO

Targeted inhibition of platelet-derived growth factor signaling prevents muscle fiber growth during skeletal muscle hypertrophy

Project description:The platelet-derived growth-factor receptors alpha and beta (PDGFRα and PDGFRβ) mark fibroblasts and pericytes in skeletal muscle, respectively. While the role that these cells play in muscle growth has been evaluated, it was not known whether the receptors that mark these cells play a role in controlling transcriptional and functional changes during skeletal muscle hypertrophy. To evaluate this, we inhibited PDGFR signaling in mice subjected to a synergist ablation muscle growth procedure, and measured changes 3 and 10 days later. The results indicated that PDGF signaling was required for fiber hypertrophy and ECM production that occur during muscle growth.

2016-10-25 | GSE89111 | GEO

Low responders to endurance training exhibit impaired hypertrophy and divergent biological process responses in skeletal muscle

Project description:Divergent skeletal muscle phenotypes result from chronic resistance-type- versus endurance-type contraction, reflecting the principle of training specificity. However, it is unclear whether there is a common set of genetic factors that influence skeletal muscle adaptation to different modes of training. Female rats were obtained from out-bred lines selectively bred from high responders to endurance training (HRT) or low responders to endurance training (LRT; n=6/group; generation 19). Both groups underwent 14 d of synergist ablation to induce functional overload of the plantaris muscle prior to comparison to non-overload controls of the same genotype. RNA sequencing was performed to identify Gene Ontology Biological Processes with differential (LRT vs HRT) gene set enrichment. Running distance, determined well in advance of synergist ablation, increased in response to aerobic training in HRT but not LRT (65 ±26% versus -6 ±18%, respectively, mean ±SD, p<0.0001). The hypertrophy response to functional overload was attenuated in LRT versus HRT (20.1 ±5.6% versus 41.6 ±16.1%, respectively, P = 0.015). There were between-group differences in the magnitude of response of 96 upregulated- and 101 downregulated pathways. A further 27 pathways showed contrasting upregulation or downregulation in LRT versus HRT in response to functional overload. In conclusion, low responders to aerobic endurance training were also low responders for compensatory hypertrophy, and attenuated hypertrophy was associated with differential gene expression. Thus, our findings suggest that genetic factors that underpin aerobic training maladaptation may also dysregulate the transcriptional activity of biological processes that contribute to adaptation to mechanical overload.

2020-12-31 | GSE156724 | GEO

Mus musculus

Project description:Expression data during plantaris muscle hypertrophy induced by synergist ablation in young adult mice

| PRJNA203551 | ENA

Anabolic resistance of skeletal muscle in cancer cachexia is caused by impaired IGF1 expression to mechanical loading

Project description:Cachexia is a systemic metabolic syndrome characterized by loss of fat and skeletal muscle mass in chronic wasting diseases such as cancer. The regulation of cellular protein synthesis in response to workload in skeletal muscle is generally blunted in cancer cachexia; however, the precise molecular regulation is largely unknown. In this study, to examine the molecular mechanism of skeletal muscle protein metabolism in cancer cachexia, we analyzed comprehensive gene expression in skeletal muscle using microarrays. CD2F1 mice (male, 7 weeks old) were subcutaneously transplanted (1*10^6 cells per mouse) with a mouse colon cancer-derived cell line (C26) as a model of cancer cachexia. Functional overload of the plantaris muscle by synergist ablation was performed at the 2nd week, and the plantaris muscle was sampled at the 4th week of cancer transplantation. The hypertrophy of skeletal muscle (increased skeletal muscle weight/protein synthesis efficiency and activation of mTOR signaling) associated with compensatory overload was significantly suppressed with the cancer cachexia. Gene expression profiling and pathway analysis by microarray showed that resistance to muscle protein synthesis associated with cancer cachexia was induced by downregulation of insulin-like growth factor-1. These observations show that cancer cachexia induces resistance to muscle protein synthesis, which could be a potential factor inhibiting the adaptation of skeletal muscle growth to physical exercise.

2021-10-15 | GSE185934 | GEO

Overloading MuSCs

Project description:Skeletal muscle possesses the ability to adapt its size in response to milieus, which is called plasticity. Overload like resistance training induces the increment of muscle mass called muscle hypertrophy. Muscle stem cells (also known as muscle stem cells) function to supply new nuclei for myofiber during the overload in muscle. Using compensatory hypertrophy in plantaris muscles, we isolated MuSCs from plantaris muscles 4 days after surgery. Control MuSCs were also prepared from sham plantaris muscles.

2019-09-23 | GSE135903 | GEO

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