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.
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA794074 | ENA |
REPOSITORIES: ENA
Similar Datasets
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
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.
2022-07-28 | GSE192990 | GEO
Project description:RNAseq analysis of skeletal muscle transcriptomes from wild-type and LONP1 skeletal muscle specific knockout (LONP1-MKO) mice
| PRJNA699182 | ENA
Project description:For additional details see Ebert et al, Identification and Small Molecule Inhibition of an ATF4-dependent Pathway to Age-related Skeletal Muscle Weakness and Atrophy. Quadriceps femoris muscles were harvested from 22-month-old muscle-specfic ATF4 knockout (ATF4 mKO) mice and littermate controls. mRNA levels in ATF4 mKO muscles were normalized to levels in littermate control muscles.
2015-09-03 | E-GEOD-72658 | biostudies-arrayexpress
Project description:This experiment was conducted to identify the mitochondrial protein changes in the presence and absence of LONP1 in skeletal muscle. The following abstract from the submitted manuscript describes the major findings of this work.Disuse-associated loss of muscle LONP1 impairs mitochondrial quality and causes reduced skeletal muscle mass and strength. Zhisheng Xu, Tingting Fu, Qiqi Guo, Danxia Zhou, Wanping Sun, Zheng Zhou, Lin Liu, Liwei Xiao, Yujing Yin, Yuhuan Jia, Xin Pan, Lei Fang, Min-sheng Zhu, Wenyong Fei, Bin Lu and Zhenji Gan. Mitochondrial proteolysis is an evolutionarily conserved quality control mechanism to maintain proper mitochondrial integrity and function. However, the physiological relevance of stress-induced impaired mitochondrial protein quality remains unclear. Here, we demonstrate that LONP1, a major mitochondrial protease resides in the matrix, plays a critical role in controlling mitochondrial quality as well as skeletal muscle mass and strength in response to muscle disuse. In humans and mice, disuse-related muscle loss is associated with decreased mitochondrial LONP1 protein. Skeletal muscle-specific ablation of LONP1 in mice resulted in impaired mitochondrial protein turnover, leading to mitochondrial dysfunction. This caused reduced muscle fiber size and strength. Mechanistically, aberrant accumulation of mitochondrial-retained protein in muscle upon loss of LONP1 induces the activation of autophagy-lysosome degradation program of muscle loss. Overexpressing a mitochondrial-retained mutant ornithine transcarbamylase (ΔOTC), a known protein degraded by LONP1, in skeletal muscle induces mitochondrial dysfunction, autophagy activation, and cause muscle loss and weakness. Thus, these findings reveal a pivotal role of LONP1-dependent mitochondrial protein quality-control in safeguarding mitochondrial function and preserving skeletal muscle mass and strength, and unravel an intriguing link between mitochondrial protein quality and muscle mass maintenance during muscle disuse.
2022-01-05 | PXD029722 | Pride
Project description:ATF4 is a fasting-induced trascription factor that promotes skeletal muscle atrophy. The goal of these studies was to determine how of loss of ATF4 affects skeletal muscle mRNA expression. For additional details see Ebert et al, Stress-Induced Skeletal Muscle Gadd45a Expression Reprograms Myonuclei and Causes Muscle Atrophy. JBC epub. June 12, 2012. Muscle-specfic ATF4 knockout (ATF4 mKO) mice and littermate controls were fasted for 24 hours and then tibialis anterior muscles were harvested. mRNA levels in ATF4 mKO muscles were normalized to levels in littermate control muscles.
2012-09-15 | E-GEOD-39193 | biostudies-arrayexpress
Project description:In the present study we have studied the mechanistic and functional aspects of NCoR1 function in mouse skeletal muscle. NCoR1 muscle-specific knockout mice exhibited an increased oxidative metabolism. Global gene expression analysis revealed a high overlap between the effects of NCoR1 deletion and peroxisome proliferator-activated receptor (PPAR) gamma coactivator 1alpha (PGC-1alpha) overexpression on oxidative metabolism in skeletal muscle. The repressive effect of NCoR1 on oxidative phosphorylation gene expression specifically antagonizes PGC-1alpha-mediated coactivation of ERRalpha. We therefore delineated the molecular mechanism by which a transcriptional network controlled by corepressor and coactivator proteins determines the metabolic properties of skeletal muscle, thus representing a potential therapeutic target for metabolic diseases. Gene expression of a total of 20 gastrocnemius samples from control (CON, n = 5), NCoR1 muscle-specific knockout (NCoR1 MKO, n = 5), wild type (WT, n = 5) and PGC-1alpha muscle-specific transgenic (PGC-1alpha mTg, n = 5) adult male mice was analyzed using GeneChip® Gene 1.0 ST Array System (Affymetrix). NCoR1 MKO and PGC-1alpha mTg samples were compared to CON and WT samples, respectively.
2013-01-08 | E-GEOD-40439 | biostudies-arrayexpress
Project description:This experiment was conducted to identify mRNA transcripts alteration in muscle from skeletal muscle-sepcific Fundc1-knockout mice. The following abstract from the submitted manuscript describes the major findings of this work. Mitophagy directs muscle-adipose crosstalk to alleviate dietary obesity. Tingting Fu, Zhisheng Xu, Lin Liu, Qiqi Guo, Hao Wu, Xijun Liang, Danxia Zhou, Liwei Xiao, Lei Liu, Yong Liu, Min-Sheng Zhu, Quan Chen and Zhenji Gan. The quality of mitochondria in skeletal muscle is essential for maintaining metabolic homeostasis during adaptive stress responses. However, the precise control mechanism of muscle mitochondrial quality and its physiological impacts remain unclear. Here, we demonstrate that FUNDC1, a mediator of mitophagy, plays a critical role in controlling muscle mitochondrial quality as well as metabolic homeostasis. Skeletal muscle-specific ablation of FUNDC1 in mice resulted in LC3-mediated mitophagy defect, leading to impaired mitochondrial energetics. This caused decreased muscle fat utilization and endurance capacity during exercise. Interestingly, mice lacking muscle FUNDC1 were protected against high-fat diet-induced obesity with improved systemic insulin sensitivity and glucose tolerance despite reduced muscle mitochondrial energetics. Mechanistically, FUNDC1 deficiency elicited a retrograde response in muscle that upregulated FGF21 expression, thereby promoting the thermogenic remodeling of adipose tissue. Thus, these findings reveal a pivotal role of FUNDC1-dependent mitochondrial quality-control in mediating the muscle-adipose dialogue to regulate systemic metabolism.
2018-05-01 | GSE99803 | GEO
Project description:Gadd45a is a stress-induced protein that causes skeletal muscle atrophy. The goal of these studies was to determine the effects of Gadd45a overexpression on mRNA levels in mouse skeletal muscle. For additional details see Ebert et al, Stress-Induced Skeletal Muscle Gadd45a Expression Reprograms Myonuclei and Causes Muscle Atrophy. JBC epub. June 12, 2012. Tibialis anterior (TA) muscles from muscle-specfic ATF4 knockout mice (ATF4 mKO) were transfected with either 20 mg empty plasmid (pcDNA3) (left TA) or 20 mg pCMV-FLAG-Gadd45a (right TA) and harvested 7 days later. mRNA levels in Gadd45a-transfected muscles were normalized to levels in control transfected muscles.
2012-09-15 | E-GEOD-39196 | biostudies-arrayexpress
Project description:To investigate the roles of ATF4 in skeletal muscle aging we generated muscle-specific ATF4 knockout (ATF4 mKO) mice. We then performed gene expression profiling analysis using data obtained from RNA-seq of tibialis anterior muscles at 6-months and 22-months of age.
2023-05-02 | GSE212675 | GEO