DNA methylation study of satellite cells from the rotator cuff and gastrocnemius muscles of mice
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ABSTRACT:
PROVIDER: PRJNA449354 | ENA |
REPOSITORIES: ENA
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Project description:The samples consist of cells from two muscle types in mice – rotator cuff and gastrocnemius muscles. The aim of the project is to study the methylation differences between the two muscle types, specifically in genes involved in adipogenesis and muscle regeneration in the rotator cuff muscle with the gastrocnemius muscle being the control.
2018-09-29 | GSE112867 | GEO
Project description:Myosteatosis is the pathological accumulation of lipid that occurs in conjunction with atrophy and fibrosis following skeletal muscle injury or disease. Little is known about the mechanisms by which lipid accumulates in myosteatosis, but many studies have demonstrated the degree of lipid infiltration negatively correlates with muscle function and regeneration. Our goal was to identify biochemical pathways that lead to muscle dysfunction and lipid accumulation in injured rotator cuff muscles, a model that demonstrates severe myosteatosis. Adult rats were subjected to a massive tear to the rotator cuff musculature. After a period of either 0 (healthy control), 10, 30, or 60 days, muscles were prepared for RNA sequencing, shotgun lipidomics, metabolomics, biochemical measures, electron microscopy, and muscle fiber contractility. Following rotator cuff injury, there was a decrease in muscle fiber specific force production that was lowest at 30d. There was a dramatic time dependent increase in triacylglyceride content. Interestingly, genes related to not only triacylglyceride synthesis, but also lipid oxidation were largely downregulated over time. Using bioinformatics techniques, we identified that biochemical pathways related to mitochondrial dysfunction and reactive oxygen species were considerably increased in muscles with myosteatosis. Long chain acyl-carnitines and L-carnitine, precursors to beta-oxidation, were depleted following rotator cuff tear. Electron micrographs showed injured muscles displayed large lipid droplets within mitochondria at early time points, and an accumulation of peripheral segment mitochondria at all time points. Several markers of oxidative stress were elevated following rotator cuff tear. The results from this study suggest that the accumulation of lipid in myosteatosis is not a result of canonical lipid synthesis, but occurs due to decreased lipid oxidation in mitochondria. A failure in lipid utilization by mitochondria would ultimately cause an accumulation of lipid even in the absence of increased synthesis. Further study will identify whether this process is required for the onset of myosteatosis.
2018-08-29 | GSE103266 | GEO
Project description:Rotator cuff tear is a common disease in elderly patients. The satellite cell has central role of muscle regeneration, however, there are few reports about human muscle. The purpose of this study was to compare features of human myogenic and adipogenic precursors in both torn supraspinatus (SSP) and intact subscapularis (SSC). Comprehensive gene expression patterns were compared between SSP and SSC muscles by microarray analisys.
2017-12-31 | GSE93661 | GEO
Project description:Rats were subjected to bilateral rotator cuff tears of the right and left supraspinatus muscle. Muscles were harvested from each shoulder at 0, 10, 30, or 60 days post surgery.
2017-06-05 | ST000666 | MetabolomicsWorkbench
Project description:Myosteatosis, also known as fatty infiltration, is the pathological accumulation of lipid that occurs in conjunction with atrophy and fibrosis following rotator cuff injury. Little is known about the mechanisms by which lipid accumulates in myosteatosis, but many studies have demonstrated the degree of lipid infiltration negatively correlates with muscle function and regeneration. Identifying how reduced mechanical loading activates molecular pathways that lead to myosteatosis could help to develop targeted therapies to improve functional outcomes after rotator cuff repair. Our objective was to use cutting compare muscle fiber contracility, proteomic, RNA sequencing and shotgun metabolomics along with bioinformatics to identify potential pathways and cellular processes that are dysregulated after rotator cuff teaar.
2020-04-15 | PXD009034 | Pride
Project description:In this study, we collected rabbit supraspinatus muscle tissue with higher temporal resolution (1, 2, 4, 8 weeks)after 8 wk tear followed by repair (n=4/group), to determine time-depenet transcriptional changes after repair. RNA sequencing and analyses were performed using standard techniques to identify a transcriptional timeline of rotator cuff muscle changes and related morphological sequelae.
2023-04-26 | GSE186320 | GEO
Project description:The purpose of this study is to identify dysregulated ncRNAs and understand how they influence Rotator cuff tears (RCT). We performed RNA sequencing and miRNA sequencing on 5 pairs of torn supraspinatus muscles and matched unharmed subscapularis muscles to identify RNAs dysregulated in RCT patients. Based on the results of differential expression analysis and miRNA targeting information, we constructed lncRNA/circRNA-associated dysregulated ceRNA networks in RCT. We found the largest module in the ceRNA network and identified several important ncRNAs in this module, which may have critical roles in RCT.
2022-04-21 | GSE199485 | GEO
Project description:The purpose of this study is to identify dysregulated ncRNAs and understand how they influence Rotator cuff tears (RCT). We performed RNA sequencing and miRNA sequencing on 5 pairs of torn supraspinatus muscles and matched unharmed subscapularis muscles to identify RNAs dysregulated in RCT patients. Based on the results of differential expression analysis and miRNA targeting information, we constructed lncRNA/circRNA-associated dysregulated ceRNA networks in RCT. We found the largest module in the ceRNA network and identified several important ncRNAs in this module, which may have critical roles in RCT.
2022-04-21 | GSE199484 | GEO
Project description:We harvested the blood samples from rotator cuff tear patients with and without shoulder stiffness.Then, circulating exosomes were harvested, and the miRNAs content was analyzed with an aim to idenfity differentially expressed miRNAs.
2021-08-31 | GSE182896 | GEO
Project description:Rotator cuff injuries result in over 500,000 surgeries performed annually, an alarmingly high number of which fail. These procedures typically involve repair of the injured tendon and removal of the subacromial bursa. However, recent identification of a resident population of mesenchymal stem cells and inflammatory responsiveness of the bursa to tendinopathy indicate an unexplored biological role of the bursa in the context of rotator cuff disease. Therefore, we aimed to understand the clinical relevance of bursa-tendon crosstalk, characterize the biologic role of the bursa within the shoulder, and test the therapeutic potential for targeting the bursa. Proteomic profiling of patient bursa and tendon samples demonstrated that the bursa is activated by tendon injury. Using a rat to model rotator cuff injury and repair, tenotomy-activated bursa protected the intact tendon adjacent to the injured tendon and maintained the morphology of the underlying bone. The bursa also promoted an early inflammatory response in the injured tendon, initiating key players in wound healing. In vivo results were supported by targeted organ culture studies of the bursa. To examine the potential to therapeutically target the bursa, dexamethasone was delivered to the bursa, prompting a shift in cellular signaling towards modulating inflammation in the healing tendon. In conclusion, contrary to current clinical practice, the bursa should be retained to the greatest extent possible and provides a new therapeutically target for improving tendon healing outcomes.
2023-07-07 | GSE235861 | GEO