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Effect of USP21 deficiency on transcriptomes in skeletal muscle of mice

ABSTRACT: Effect of USP21 deficiency on transcriptomes in skeletal muscle of mice

PROVIDER: PRJNA669695 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR12831440_1.fastq.gz	Fastqsanger.gz
	SRR12831440_2.fastq.gz	Fastqsanger.gz
	SRR12831441_1.fastq.gz	Fastqsanger.gz
	SRR12831441_2.fastq.gz	Fastqsanger.gz
	SRR12831442_1.fastq.gz	Fastqsanger.gz

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Effect of USP21 deficiency on transcriptomes in skeletal muscle of mice

Project description:Skeletal muscle is the pivotal organ for energy homeostasis, but the regulatory mechanisms are largely unknown. Here, we report that ubiquitin specific protease 21 (USP21) is a regulator of skeletal muscle physiology. To elucidate features important for USP21, we performed RNA-sequencing analysis using the muscle tissue of muscle-specific USP21 knockout (USP21-MKO) mice or wild-type littermates with floxed genotype, screened and analyzed the differentially expressed genes. Transcriptomics assay enabled us to discover major signaling nodes persistently activated by USP21 ablation in close association with the genes linked to fuel oxidation. Consequently, USP21 ablation altered gross metabolic phenotypes.

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Effect of Sidt2 deficiency on skeletal muscle

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Effect of Sidt2 deficiency on skeletal muscle

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RNAseq data comparing iKPC cells overexpressing WT-USP21 and ED-USP21

Project description:USP21 belongs to ubiquitin specific protease (USP) family. To dissect the molecular mechanisms that regulated by USP21 overexpression in PDAC cells, we conducted RNA-seq analysis of iKPC PDAC cells overexpressing wild-type USP21 (WT-USP21) and enzyme dead USP21 (ED-USP21).

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RNAseq analysis of skeletal muscle transcriptomes from wild-type and LONP1 skeletal muscle specific knockout (LONP1-MKO) mice

Project description:Mitochondria serve diverse functions and are essential organelles that require continuous surveillance to maintaintheir integrity and function. LONP1 is an evolutionarily conservedserine peptidase that safeguards mitochondrial protein quality from yeast to human.To investigatethe physiological role of LONP1-mediated mitochondrial quality-control in skeletal musclein vivo, we generated skeletal muscle-specificLonp1-knockout mice (referred to as LONP1 MKO). We performedtranscriptome analysis by whole-genome gene expression profiling experiments in gastrocnemius (GC) muscle from both wild-type (WT) and LONP1-MKO mice. Knockout of LONP1 in skeletal muscle resulted in deregulation of 457 genes in 2-week-old mice and of 1922 genes in 6-week-old mice. Gene ontology analysis revealed that LONP1 deficiency triggers unfolded protein response (UPR) in skeletal muscle.Moreover, GSEA analysis of transcriptomic datain 6-week-old micefurther revealed that genes deregulated by LONP1 deficiency were significantly enriched during aging.Together, the transcriptional profiling results suggest a critical role of LONP1 in regulating skeletal muscle metabolism and health.

2022-01-05 | GSE166071 | GEO

GRSF1 deficiency in skeletal muscle reduces endurance in aged mice

Project description:GRSF1 is a mitochondrial RNA-binding protein important for maintaining mitochondrial function. We found that GRSF1 is highly expressed in cultured skeletal myoblasts differentiating into myotubes. To understand the physiological function of GRSF1 in vivo, we generated mice in which GRSF1 was specifically ablated in skeletal muscle. The conditional knockout mice (Grsf1cKO) appeared normal until 7-9 months of age. Importantly, however, a reduction of muscle endurance compared to wild-type controls was observed in 16- to18-month old Grsf1cKO mice. Transcriptomic analysis revealed more than 200 mRNAs differentially expressed in Grsf1cKO muscle at this age. Notably, mRNAs encoding proteins involved in mitochondrial function, inflammatory reaction, and ion transport, including Mgarp, Cxcl10, Nfkb2, and Sln, were significantly elevated in aged Grsf1cKO muscle. Our findings suggest that GRSF1 deficiency exacerbates the functional decline of aged skeletal muscle, likely through multiple downstream genes.

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CD36 deficiency inhibits proliferation by cell cycle control in skeletal muscle cells

Project description:Obesity-related muscular dysfunction and relative muscle atrophy affect an increasing number of people. Elucidating the molecular mechanisms of skeletal muscle cell development and growth may contribute to the maintenance of skeletal muscle mass in obesity. Fatty acid translocase (FAT/CD36), as a long-chain fatty acid transport protein, is crucial for lipid metabolism and signaling. CD36 is known to function in myogenic differentiation, and whether it affects the proliferation of skeletal muscle cells and the underlying mechanisms remain unclear. In this study, the effect of CD36 deficiency on skeletal muscle cell viability and proliferation was examined using C2C12 myoblasts. Results showed that the deletion of CD36 enhanced the inhibitory effect of PA on the proliferation and the promotion of apoptosis in skeletal muscle cells. Intriguingly, the silencing of CD36 suppressed cell proliferation by preventing the cell cycle from the G0/G1 phase to the S phase in a cyclin D1/CDK4-dependent manner. Overall, we demonstrated that CD36 was involved in skeletal muscle cell proliferation by cell cycle control, and these findings might facilitate the treatment of obesity-related muscle wasting.

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Effect of Sirt6 deficiency on transcriptome in skeletal muscle of mice

Project description:Expanding the exercise capacity is an emerging strategy to combat metabolic diseases. Skeletal muscle fiber type determination is critical for the exercise performance, but the regulatory basis is largely unknown. Here, we report that Sirt6 has a role in regulating myofiber configuration toward oxidative type and that Sirt6 activator can be an exercise mimetic. To elucidate molecular mechanisms, we performed RNA-sequencing analysis using WT and skeletal muscle-specific Sirt6 KO mice. Transcriptomic analysis enabled us to discover major signaling nodes altered by Sirt6 deficiency in close association with mitochondrial function and muscle phenotypes.

2022-02-25 | GSE186105 | GEO

RNAseq analysis of skeletal muscle transcriptomes from wild-type, LONP1 skeletal muscle specific knockout (LONP1 mKO) and LONP1ATF4 skeletal muscle double-knockout (LONP1ATF4 DmKO) mice.

Project description:Studying the molecular basis for the skeletal muscle mitochondrial stress response could potentially be targeted to counteract metabolic disorders such as obesity. We uncovered a crucial role for the mitochondrial protease LONP1 in controlling the muscle mitochondrial proteostasis stress response that governs systemic metabolic homeostasis. Skeletal muscle-specific ablation of LONP1 led to broad genomic reprogramming of muscle and protected the mice from HFD-induced obesity. To thoroughly analyze pathways that are affected by ATF4 deficiency in the context of LONP1 mKO, we performed RNA-Seq transcriptome analysis of skeletal muscles from WT, LONP1 mKO and LONP1ATF4 DmKO mice. We identified a total of 3017 differentially expressed genes with a cutoff of 1.5-fold, and p < 0.05. Surprisingly, we found that ATF4 loss blunted a subset of regulated genes in LONP1 mKO muscles, whereas the majority of differentially regulated genes in LONP1 mKO muscles were not affected by ATF4 ablation. GO analysis of ATF4-dependent genes regulated by LONP1 ablation revealed significant enrichment in amino acid metabolic processes, Interestingly, however, LONP1 deficiency induced activation of muscle UPR and UPR-related RNA processing as well as myokine pathways were not affected by ATF4 ablation. Therefore, our results highlight a ATF4-independent mechanism in mediating the UPRmt in mammals.

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