Browse
Submit Data
Databases
API
Help

Dataset Information

0 Views

0 Connections

0 Citations

0 Reanalyses

0 Downloads

Omics score: 0

LSMEM2, localized at the neuromuscular junction, modulates mitochondrial integration in skeletal muscles

ABSTRACT: In addition to the canonical metabolism-regulating function, AMP-activated protein kinase (AMPK) has non-canonical functions, in which AMPK spatiotemporally phosphorylates specific sets of substrates. Recently, we identified LSMEM2, a novel substrate of AMPK in the heart. LSMEM2 is a membrane protein localized at the intercalated disc (ICD), whose function is currently under investigation. Interestingly, LSMEM2 is also expressed in the skeletal muscles. As skeletal muscles lack a homophilic intercellular junction corresponding to the ICD in the heart, predicting the role of LSMEM2 in skeletal muscles is difficult. In this study, we identified that LSMEM2 is expressed in skeletal muscles, specifically at the neuromuscular junction (NMJ). LSMEM2-knockout mice showed no histological abnormalities, suggesting that LSMEM2 is not essential for skeletal muscle development. The overexpression of full-length wild-type or C-del mutant of LSMEM2 led to the tubular aggregate formation with functional abnormality in male mice. RNA sequence analysis revealed that the genesets of mitochondrial oxidative phosphorylation and vesicle-mediated transport are enriched in LSMEM2 overexpression. Furthermore, histological analysis demonstrated the accumulation of swollen subsarcolemmal mitochondria in LSMEM2-overexpressing skeletal muscles. The study findings suggest that LSMEM2 may play a role in the pathogenesis of skeletal muscle diseases.

ORGANISM(S): Mus musculus

PROVIDER: GSE285026 | GEO | 2025/06/25

REPOSITORIES: GEO

ACCESS DATA

Json Xml

Dataset's files

Source:

			Action	DRS
		Other

Items per page:

1 - 1 of 1

Similar Datasets

Secreted Protein Acidic and Rich in Cysteine Improves Glucose Tolerance via AMP-activated Protein Kinase Activation

Project description:Metabolic dysfunction of skeletal muscle is often prevalent at an early stage in the development of several non-communicable diseases. Here, we investigated the effect of a myokine, secreted protein acidic and rich in cysteine (SPARC), on glucose tolerance in human and mouse skeletal muscles. SPARC knockout mice showed marked decreases in parameters for whole-body glucose metabolism, along with reduced phosphorylation of AMPK and Akt in skeletal muscle tissues compared with wild-type mice. Furthermore, mice injected with SPARC showed improved glucose tolerance concomitant with AMPK activation. Exogenous SPARC treatment accelerated glucose uptake in muscle tissues isolated from wild-type mice but not from AMPKγ3 knockout mice. In muscle cells, SPARC increased glucose uptake concomitant with AMPK activation, mediated by a calcium-dependent signal. Chronic treatment of SPARC restored metabolic functions in diet-induced obese mice. These findings suggest that SPARC improves glucose metabolism via AMPK activation in skeletal muscle, providing mechanistic insights on exercise-induced metabolic benefits and physical inactivity-induced glucose intolerance.

2019-06-03 | GSE93546 | GEO

Identification of genes regulated by long noncoding RNA H19 in skeletal muscle

Project description:Soleus muscle has the most abundant H19 expression compared to other skeletal muscle tissues. In order to identify genes regulated by long noncoding RNA H19 in skeletal muscle, we performed RNA-Seq with dissected WT and H19KO soleus muscles from 21 week old mice. Among the differentially expressed genes, we found skeletal muscle - overexpressed gene DUSP27, which potentially plays an important role in regulating skeletal muscle glucose metabolisim by regulating the activitiy of AMPK, might be a target of H19 mediated regulation.

2018-08-30 | GSE103202 | GEO

LSMEM2, localized at the neuromuscular junction, modulates mitochondrial integration in skeletal muscles

Project description:LSMEM2, localized at the neuromuscular junction, modulates mitochondrial integration in skeletal muscles

| PRJNA1201062 | ENA

Transcriptome sequencing of skeletal muscle for PRMT7 knockout mouse

Project description:We report that whole body PRMT7-/- adult mice display a significant reduction in in muscle mass. RNA sequencing was performed to identify potential PRMT7 targets. We found that top canonical pathways affected by the loss of PRMT7 includes cell cycle and senescence. RNA was extracted from tibialis anterior muscles harvested from 3 WT and 3 PRMT7 null mice at 8months. RNA sequencing was performed to compare mRNA in skeletal muscles between WT and KO mice.

2016-07-03 | E-GEOD-75993 | biostudies-arrayexpress

Expression data from quadriceps muscle of WT and ERRgamma transgenic mice

Project description:We show that the orphan nuclear receptor ERRg is expressed at high levels in type I muscle and when transgenically expressed in anaerobic type II muscles (ERRGO mice) or cultured cells, powerfully regulates VEGF expression, angiogenesis and vascular supply in absence of exercise. ERRGO mice show increased expression of genes promoting fat metabolism, mitochondrial respiration and type I fiber specification. In parallel, the type II muscle in ERRGO mice display an activated angiogenic program marked by myofibrillar induction and secretion of pro-angiogenic factors, frank neo-vascularization and a 100% increase in running endurance. Surprisingly, the induction of VEGF and type I muscle properties by ERRg does not involve the transcriptional co-activator PGC1a. Instead, ERRg genetically activates the energy sensor AMPK which is typically inactive in absence of exercise. Therefore, ERRg and AMPK, known regulators of mitochondrial function and metabolism, together control a novel angiogenic pathway that anatomically synchronizes vascular arborization to oxidative metabolism revealing an exercise-independent mechanism for matching supply and demand. Keywords: ERRgamma overexpression compared to wild-type Comparison of gene expression from quadriceps muscles isolated from wild type and alpha-skeletal actin-ERRgamma-transgenic mice.

2011-09-18 | E-GEOD-22086 | biostudies-arrayexpress

AMPK gamma3 knock-out and mutant (R225Q) transgenic mice compared to corresponding wild type littermates

Project description:This SuperSeries is composed of the following subset Series: GSE4063: Gene expression in skeletal muscle in AMPK gamma3 knock-out mice and wild type littermates GSE4065: Gene expression in skeletal muscle in AMPK gamma3 mutant (R225Q) transgenic mice and wild type littermates. Note: GSE4063 and GSE4065 are not directly comparable. Keywords: SuperSeries Refer to individual Series

2006-02-15 | E-GEOD-4067 | biostudies-arrayexpress

Differential isoform expression and selective muscle involvement in muscular dystrophies

Project description:To test the hypothesis that different muscles may express variable amounts of different isoforms of muscle genes, we applied a custom-designed exon microarray containing probes for 57 muscle-specific genes to assay the transcriptional profiles in sets of human adult, lower limb skeletal muscles. Muscle biopsies from 15 individuals were selected for analysis dissected from 21 anatomically different muscles collected from eight men and seven women, ranging from 61 to 91 years The muscle tissue samples collected included samples from 11 different thigh muscles––vastus medialis, vastus lateralis, vastus intermedialis, sartorius, gracilis, semimembranosus, semitendinosus, biceps femoris, adductor magnus, adductor longus, and rectus femoris––and 10 lower leg muscles––flexor digitorum longus, extensor digitorum longus, tibialis posterior, tibialis anterior, peroneus longus/brevis, extensor hallucis longus, gastrocnemius lateralis, gastrocnemius medialis, flexor hallucis longus, and soleus. Approximately five to seven muscle pieces were collected from each individual muscle sampled. The muscle sample pieces obtained for histological analysis measured roughly 10 mm x 5 mm, and the pieces for RNA isolation 5 mm x 5 mm. The samples were obtained directly from the proximal vital parts of the amputated limbs and processed immediately following their removal to avoid tissue degradation.To test the hypothesis that different muscles may express variable amounts of different isoforms of muscle genes, we applied a custom-designed Agilent exon microarray containing probes for 57 muscle-specific genes to assay the transcriptional profiles in sets of human adult, lower limb skeletal muscles

2015-06-17 | E-GEOD-69938 | biostudies-arrayexpress

Top-down LCMS Quantification

Project description:Simultaneous quantification of sarcomeric protein expression and modification in rat skeletal muscles and sheep cardiac muscles

2018-04-03 | MSV000082234 | MassIVE

Regulatory function of sympathetic innervation on the endo/lysosomal trafficking of acetylcholine receptor

Project description:Regulation of membrane receptors involves management of endocytosis. At the neuromuscular junction, the synapse between skeletal muscle and motoneuron, proper density of the major receptor, the acetylcholine receptor, is of utmost importance for sustaining life in context of mobility. Recent work has revealed innervation of NMJs by sympathetic neurons and destruction of them had morphological and functional consequences, suggesting influence on endocytosis. To investigate the pathways and proteins that are relevant for acetylcholine receptor turnover and affected by sympathetic signaling, proteomes of mouse hindlimb muscles from sympathectomized and saline-treated control muscles were compared. Using proteomic, Western blot, and immunofluorescence analysis in chemically sympathectomized mouse hindlimb muscles, the cause of these consequences were aimed to analyzed. This revealed extensive regulation of the proteome by the sympathetic nervous system and a possible regulatory function of the endo/lysosomal and autophagic pathway by sympathetic neuronal input. This finding might provide a new explanation to the observed benefit of sympathicomimetic treatment in several congenital myasthenic syndromes.

2021-03-01 | PXD021601 | Pride

Circadian Dysfunction in Skeletal Muscle Impairs Limb Perfusion and Muscle Regeneration in Peripheral Artery Disease [Myotube-ATACseq]

Project description:Peripheral arterial disease (PAD), caused by atherosclerosis, leads to limb ischemia, muscle damage, and impaired mobility in the lower extremities. Recent studies suggest that circadian rhythm disruptions can hinder vascular repair during ischemia, but the specific tissues involved and the impact on muscle health remain unclear. This study investigates the role of the skeletal muscle circadian clock in muscle adaptation to ischemic stress using a surgical mouse model of hindlimb ischemia. We used mice with specific genetic loss of the circadian clock activator, BMAL1, in adult skeletal muscle tissues (Bmal1muscle). Bmal1muscle mice and controls underwent femoral artery ligation surgery to induce hindlimb ischemia. Laser doppler imaging was used to assess limb perfusion at various time points after the surgery. Muscle tissues were analyzed with RNA sequencing and histological examination to investigate PAD-related muscle pathologies. Additionally, we studied the role of BMAL1 in muscle fiber adaptation to hypoxia using RNA and ATAC sequencing analyses in primary myotube culture model. Disrupted expression of circadian rhythm-related genes was observed in existing RNA-seq datasets from PAD patient-derived endothelial cells and ischemic limb skeletal muscles. Genetic loss of Bmal1 specifically in adult mouse skeletal muscle tissues delayed reperfusion recovery following induction of hindlimb ischemia. Histological examination of muscle tissues showed reduced regenerated myofiber number and a decreased proportion of type IIB fast-twitch myofibers in Bmal1musc mouse muscles in the ischemic limbs, but not in their contralateral non-ischemic limbs. Transcriptomic analysis revealed abrogated metabolic, angiogenic, and myogenic pathways relevant to hypoxia-adaptation in Bmal1musc mouse muscles. These changes were corroborated in Bmal1-deficient cultured primary myotubes cultured under hypoxic conditions.

2024-09-02 | GSE275893 | GEO

OmicsDI is part of the ELIXIR infrastructure

OmicsDI is an Elixir interoperability service. Learn more ›

Tweets

OmicsDI Databases

PRIDE
PeptideAtlas
MassIVE
JPOST Repository
Physiome Model Repository

EGA
EVA
ENA
LINCS
PAXDB
Cell Collective

MetaboLights
Metabolomics Workbench
MetabolomeExpress
GNPS
BioModels
FAIRDOMHub

ArrayExpress
dbGaP
ExpressionAtlas
GEO
NODE

Information

Databases
Help
API
Contact us
Code on GitHub
Terms of use
Submit Data