The Transcriptional Landscape of Bovine Skeletal Muscle
Ontology highlight
ABSTRACT:
ORGANISM(S): Bos taurus
PROVIDER: GSE25554 | GEO | 2010/11/24
SECONDARY ACCESSION(S): PRJNA134273
REPOSITORIES: GEO
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Project description:Transcriptional profiling of Bovine skeletal muscle was conducted comparing age of cattle and dietary regimes 4 prenatal time points, 4 postnatal time points, 2 dietary regimes at 3 time points
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Project description:In this study, 7188 bovine skeletal muscle lncRNAs were identified by RNA-Seq and a stringent screening procedure in four different muscle tissues. These lncRNAs shared many characteristics with other mammalian lncRNAs, such as the shorter ORF and lower expression level than mRNAs. Furthermore, the chromosomal locations and global expression patterns for these lncRNAs were also described in detail.Our results provided a global expression pattern of lncRNAs specific to bovine skeletal muscle and supplied us important targets for studying the function of lncRNAs in muscle development, which would help to better identify mechanisms underlying muscle development in bovine.
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Project description:We present the application of large-scale multivariate mixed-model equations to the joint analysis of nine gene expression experiments in beef cattle muscle and fat tissues with a total of 147 hybridizations, and exploring 47 experimental conditions or treatments. Using a correlation-based method, we constructed a gene network for 822 genes. Modules of muscle structural proteins and enzymes, extracellular matrix, fat metabolism and protein synthesis were clearly evident. Detailed analysis of the network identified groupings of proteins on the basis of physical association. For example, expression of three components of the z-disk, MYOZ1, TCAP and PDLIM3, was significantly correlated. In contrast, expression of these z-disk proteins was not highly correlated with the expression of a cluster of thick (myosins) and thin (actin and tropomyosins) filament proteins, or titin, the third major filament system. However, expression of titin was itself not significantly correlated with the cluster of thick and thin filament proteins and enzymes. Correlation in expression of many fast twitch muscle structural proteins and enzymes was observed, but slow twitch specific proteins were not correlated with the fast twitch proteins or with each other. In addition, a number of significant associations between genes and transcription factors were also identified. Our results not only recapitulate the known biology of muscle, but have also started to reveal some of the underlying associations between and within the structural components of skeletal muscle. Analysis of nine gene expression experiments in beef cattle muscle and fat tissues with a total of 147 hybridizations, and exploring 47 experimental conditions or treatments.
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Project description:Wagyu cattle are renowned for their premium beef characterized by abundant intramuscular fat (IMF). In contrast, Brahman, a popular breed in the southern coastal area of the US, generally produces tough meat with scarce IMF. However, the mechanisms underlying the differential meat quality between the two breeds are still largely unknown. Using single-cell RNAseq (scRNAseq), we identified many tissue-resident and immune cell types in Wagyu, Brahman, and Wagyu/Brahman crossbred cattle muscle. Multiple fibro/adipogenic progenitor (FAP) subpopulations were identified, including an endomysial adipogenic subpopulation and a perimysial fibrogenic subpopulation. Further analysis comparing individual FAP subpopulations between Wagyu and Brahman identified stronger pro-adipogenic gene expression in Wagyu adipogenic FAP subpopulation and higher pro-fibrogenic gene expression in Brahman fibrogenic FAP subpopulation. Overexpression of CFD, a gene upregulated in Wagyu adipogenic FAPs, enhanced the adipogenic efficiency of FAPs. Moreover, the expression of CFD in FAPs was positively correlated with the IMF content. Interestingly, the expression of CFD was identified in human FAPs but not FAPs of mouse models of intramuscular adipogenesis, suggesting that CFD is a species-specific regulator of IMF formation. Using a mouse line that allows lineage-tracing of FAPs expressing Postn, a gene upregulated in Brahman FAPs, we found that Postn expression was specifically activated during fibrogenic but not adipogenic programming. Cell-cell communication analysis revealed robust interactions between FAPs and other cell types, further suggesting the critical role of FAPs in bovine skeletal muscle growth, development, and homeostasis.
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Project description:We present the application of large-scale multivariate mixed-model equations to the joint analysis of nine gene expression experiments in beef cattle muscle and fat tissues with a total of 147 hybridizations, and exploring 47 experimental conditions or treatments. Using a correlation-based method, we constructed a gene network for 822 genes. Modules of muscle structural proteins and enzymes, extracellular matrix, fat metabolism and protein synthesis were clearly evident. Detailed analysis of the network identified groupings of proteins on the basis of physical association. For example, expression of three components of the z-disk, MYOZ1, TCAP and PDLIM3, was significantly correlated. In contrast, expression of these z-disk proteins was not highly correlated with the expression of a cluster of thick (myosins) and thin (actin and tropomyosins) filament proteins, or titin, the third major filament system. However, expression of titin was itself not significantly correlated with the cluster of thick and thin filament proteins and enzymes. Correlation in expression of many fast twitch muscle structural proteins and enzymes was observed, but slow twitch specific proteins were not correlated with the fast twitch proteins or with each other. In addition, a number of significant associations between genes and transcription factors were also identified. Our results not only recapitulate the known biology of muscle, but have also started to reveal some of the underlying associations between and within the structural components of skeletal muscle. Keywords: gene network
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Project description:Transcriptomic changes in bovine skeletal muscle cells after resveratrol treatment
| PRJNA775665 | ENA