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Muscle Overload scRNA-seq

ABSTRACT: The goal of this project was to determine which mononuclear cell populations satellite cells communicate with throughout muscle during synergist ablation functional overload. Mouse plantaris muscles from tamoxifen-treated Pax7-tdT, tdT, and Pax7-DTA mice were overloaded for 4-14 days, and a subset of mononuclear cells were submitted for sc-RNA-seq.

ORGANISM(S): Mus musculus

PROVIDER: GSE168872 | GEO | 2021/07/01

REPOSITORIES: GEO

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14d OV scRNA-seq

Project description:The goal of this project was to determine which mononuclear cell populations satellite cells communicate with throughout muscle during functional overload. Pooled mouse plantaris muscles from tamoxifen-treated Pax7-tdT mice were overloaded for 14 days, and a subset of mononuclear cells were submitted for sc-RNA-seq.

2021-06-01 | GSE142529 | GEO

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

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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.

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Transcriptional analysis of tendons from mice with a tenocyte-specific deletion of IGF1R

Project description:We report RNA sequencing data from the plantaris tendons of adult male mice in the C57Bl/6 background that either have the IGF1 receptor (IGF1R) present in their tendons (Scx:IGF1R+) or mice in which IGF1R has been deleted in tenocytes expressing scleraxis (Scx:IGF1R-). Mice were created by crossing ScxCreERT2 mice with IGF1R flox/flox mice. Mice were treated with tamoxifen for 5 days to induce recombination at the IGF1R allele, and then subjected to a synergist ablation procedure in which the Achilles tendon is removed, resulting in compensatory growth of the plantaris tendon. Mice were analyzed either 7 or 14 days after synergist ablation. Control mice that did not undergo tamoxifen treatment or synergist ablation were also studied.

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

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Transcriptional analysis of tendons from mice with a targeted deletion of scleraxis

Project description:We report RNA sequencing data from the plantaris tendons of adult male mice in the C57Bl/6 background that either have the scleraxis gene (Scx+) or mice in which scleraxis has been deleted using CreERT2 driven from the Rosa26 locus (Scx-). Mice in which scleraxis was deleted were created by crossing scleraxis-floxed mice with Rosa26-CreERT2 mice. Rosa26-CreERT2 mice that did not have a floxed scleraxis allele served as controls. Mice were treated with tamoxifen for 5 days to induce recombination at the scleraxis locus, and then subjected to a synergist ablation procedure in which the Achilles tendon is removed, resulting in compensatory growth of the plantaris tendon. Mice were analyzed either 7 or 14 days after synergist ablation. Control mice that did not undergo tamoxifen treatment or synergist ablation were also studied (NOC).

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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.

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