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https://www.readbyqxmd.com/read/29717119/dkk3-dependent-transcriptional-regulation-controls-age-related-skeletal-muscle-atrophy
#1
Jie Yin, Lele Yang, Yangli Xie, Yan Liu, Sheng Li, Wenjun Yang, Bo Xu, Hongbin Ji, Lianghua Ding, Kun Wang, Gang Li, Lin Chen, Ping Hu
Age-related muscle atrophy (sarcopenia) is the leading cause for disability in aged population, but the underlying molecular mechanisms are poorly understood. Here we identify a novel role for the secreted glycoprotein Dickkopf 3 (Dkk3) in sarcopenia. Forced expression of Dkk3 in muscles in young mice leads to muscle atrophy. Conversely, reducing its expression in old muscles restores both muscle size and function. Dkk3 induces nuclear import of β-catenin and enhances its interaction with FoxO3, which in turn activates the transcription of E3 ubiquitin ligase Fbxo32 and Trim63, driving muscle atrophy...
May 1, 2018: Nature Communications
https://www.readbyqxmd.com/read/29683819/primary-and-metastatic-melanoma-with-ntrk-fusions
#2
Cecilia Lezcano, Alexander N Shoushtari, Charlotte Ariyan, Travis J Hollmann, Klaus J Busam
A number of oncogenic driver mutations have been identified in melanocytic nevi and melanoma, but translocations also play a role in tumorigenesis and provide potential therapeutic targets for malignant lesions. Various translocations, such as those involving the anaplastic lymphoma kinase (ALK), neurotrophic tropomyosin receptor kinase 1 (NTRK1), and NTRK3 have been reported in spitzoid melanocytic neoplasms leading to kinase-fusion proteins that result in immunohistochemically detectable ALK or NTRK expression...
April 20, 2018: American Journal of Surgical Pathology
https://www.readbyqxmd.com/read/29582582/mirna-23a-27a-attenuates-muscle-atrophy-and-renal-fibrosis-through-muscle-kidney-crosstalk
#3
Aiqing Zhang, Min Li, Bin Wang, Janet D Klein, S Russ Price, Xiaonan H Wang
BACKGROUND: The treatment of muscle wasting is accompanied by benefits in other organs, possibly resulting from muscle-organ crosstalk. However, how the muscle communicates with these organs is less understood. Two microRNAs (miRs), miR-23a and miR-27a, are located together in a gene cluster and regulate proteins that are involved in the atrophy process. MiR-23a/27a has been shown to reduce muscle wasting and act as an anti-fibrotic agent. We hypothesized that intramuscular injection of miR-23a/27a would counteract both muscle wasting and renal fibrosis lesions in a streptozotocin-induced diabetic model...
March 26, 2018: Journal of Cachexia, Sarcopenia and Muscle
https://www.readbyqxmd.com/read/29493231/small-molecular-weight-soybean-protein-derived-peptides-nutriment-attenuates-rat-burn-injury-induced-muscle-atrophy-by-modulation-of-ubiquitin-proteasome-system-and-autophagy-signaling-pathway
#4
Fen Zhao, Yonghui Yu, Wei Liu, Jian Zhang, Xinqi Liu, Lingying Liu, Huinan Yin
This article describes results of the effect of dietary supplementation with small molecular weight soybean protein-derived peptides on major rat burn injury-induced muscle atrophy. As protein nutrients have been previously implicated to play an important role in improving burn injury outcomes, optimized more readily absorbed small molecular weight soybean protein-derived peptides were evaluated. Thus, the quantity, sodium dodecyl sulfate polyacrylamide-gel electrophoresis patterns, molecular weight distribution, and composition of amino acids of the prepared peptides were analyzed, and a major full-thickness 30% total body surface area burn-injury rat model was utilized to assess the impact of supplementation with soybean protein-derived peptides on initial systemic inflammatory responses as measured by interferon-gamma (IFN-γ), chemokine (C-C motif) ligand 2 (CCL2, also known as MCP-1), chemokine (C-C motif) ligand 7 (CCL7, also known as MCP-3), and generation of muscle atrophy as measured by tibialis anterior muscle (TAM) weight relative to total body weight...
March 21, 2018: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/29212849/trim63-murf-1-gene-polymorphism-is-associated-with-biomarkers-of-exercise-induced-muscle-damage
#5
P Baumert, M J Lake, B Drust, C E Stewart, R M Erskine
Unaccustomed strenuous exercise can lead to muscle strength loss, inflammation and delayed-onset muscle soreness, which may be influenced by genetic variation. We investigated if a missense single nucleotide polymorphism (A>G, rs2275950 ) within the TRIM63 gene (encoding MuRF-1 and potentially affecting titin mechanical properties) was associated with the variable response to unaccustomed eccentric exercise. Sixty-five untrained, healthy participants (genotyped for rs2275950 : AA, AG, and GG) performed 120 maximal eccentric knee extensions (ECC) to induce muscle damage...
March 1, 2018: Physiological Genomics
https://www.readbyqxmd.com/read/28821632/transcriptomic-and-epigenetic-regulation-of-disuse-atrophy-and-the-return-to-activity-in-skeletal-muscle
#6
Andrew G Fisher, Robert A Seaborne, Thomas M Hughes, Alex Gutteridge, Claire Stewart, Judy M Coulson, Adam P Sharples, Jonathan C Jarvis
Physical inactivity and disuse are major contributors to age-related muscle loss. Denervation of skeletal muscle has been previously used as a model with which to investigate muscle atrophy following disuse. Although gene regulatory networks that control skeletal muscle atrophy after denervation have been established, the transcriptome in response to the recovery of muscle after disuse and the associated epigenetic mechanisms that may function to modulate gene expression during skeletal muscle atrophy or recovery have yet to be investigated...
December 2017: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/28729066/the-effect-of-high-fat-diet-on-daily-rhythm-of-the-core-clock-genes-and-muscle-functional-genes-in-the-skeletal-muscle-of-chinese-soft-shelled-turtle-trionyx-sinensis
#7
Li Liu, Guomin Jiang, Zhitao Peng, Yulong Li, Jinlong Li, Li Zou, Zhigang He, Xiaoqing Wang, Wuying Chu
In the present study, we sought to investigate the influence of high fat diet on the core clock genes and the muscle functional genes daily expression in the skeletal muscle of Chinese soft-shelled turtle. The turtles were fed by two diets including a control fat diet (the CON treatment, 7.98% lipid) and a high fat diet (the HFD treatment, 13.86% lipid) for six weeks and administrated by the photophase regimen of 24h light/dark (12L:12D) cycle. After the feeding trial experiment, we measured the daily expression levels of 17 core clock genes (Clock, Bmal1/2, NPAS2, Tim, Cry1/2, Per1/2, DBP, AANAT, NIFL3, BHLHE40, NR1D2, RORA, RORB, RORC) and 12 muscle functional genes (FBXO32, MBNL1, MSTN, Myf5, Myf6, MyoD, MyoG, MyoM1, PPARa, PDK4, Trim63, UCP3) in the skeletal muscle of the two treatments...
November 2017: Comparative Biochemistry and Physiology. Part B, Biochemistry & Molecular Biology
https://www.readbyqxmd.com/read/28400445/microrna-23a-and-microrna-27a-mimic-exercise-by-ameliorating-ckd-induced-muscle-atrophy
#8
Bin Wang, Cong Zhang, Aiqing Zhang, Hui Cai, S Russ Price, Xiaonan H Wang
Muscle atrophy is a frequent complication of CKD, and exercise can attenuate the process. This study investigated the role of microRNA-23a (miR-23a) and miR-27a in the regulation of muscle mass in mice with CKD. These miRs are located in a gene cluster that is regulated by the transcription factor NFAT. CKD mice expressed less miR-23a in muscle than controls, and resistance exercise (muscle overload) increased the levels of miR-23a and miR-27a in CKD mice. Injection of an adeno-associated virus encoding the miR-23a/27a/24-2 precursor RNA into the tibialis anterior muscles of normal and CKD mice led to increases in mature miR-23a and miR-27a but not miR-24-2 in the muscles of both cohorts...
September 2017: Journal of the American Society of Nephrology: JASN
https://www.readbyqxmd.com/read/28224701/pathogenic-role-of-anti-signal-recognition-protein-and-anti-3-hydroxy-3-methylglutaryl-coa-reductase-antibodies-in-necrotizing-myopathies-myofiber-atrophy-and-impairment-of-muscle-regeneration-in-necrotizing-autoimmune-myopathies
#9
Louiza Arouche-Delaperche, Yves Allenbach, Damien Amelin, Corinna Preusse, Vincent Mouly, Wladimir Mauhin, Gaelle Dzangue Tchoupou, Laurent Drouot, Olivier Boyer, Werner Stenzel, Gillian Butler-Browne, Olivier Benveniste
OBJECTIVE: Immune-mediated necrotizing myopathies (IMNM) may be associated with either anti-signal recognition protein (SRP) or anti-3-hydroxy-3-methylglutaryl-CoA reductase (HMGCR) antibodies (Abs), and the titer of these Abs is correlated with disease activity. We investigated whether anti-SRP and anti-HMGCR Abs could be involved in muscle damage. METHODS: Muscle biopsies of patients were analyzed for atrophy and regeneration by measuring fiber size and by performing immunostaining of neonatal myosin heavy chain...
April 2017: Annals of Neurology
https://www.readbyqxmd.com/read/28000044/dysregulation-between-trim63-fbxo32-expression-and-soleus-muscle-wasting-in-diabetic-rats-potential-role-of-mir-1-3p-29a-b-3p-and-133a-b-3p
#10
Frederico Gerlinger-Romero, Caio Yogi Yonamine, Danilo Correa Pinto Junior, João Victor DelConti Esteves, Ubiratan Fabres Machado
Diabetes mellitus (DM) induces a variable degree of muscle sarcopenia, which may be related to protein degradation and to the expression of both E3 ubiquitin ligases and some specific microRNAs (miRNAs). The present study investigated the effect of diabetes and acute muscle contraction upon the TRIM63 and FBXO32 expression as well as the potential involvement of some miRNAs. Diabetes was induced by streptozotocin and studied after 30 days. Soleus muscles were harvested, stimulated to contract in vitro for twitch tension analysis (0...
March 2017: Molecular and Cellular Biochemistry
https://www.readbyqxmd.com/read/27913948/branched-chain-amino-acids-administration-suppresses-endurance-exercise-related-activation-of-ubiquitin-proteasome-signaling-in-trained-human-skeletal-muscle
#11
Evgeny A Lysenko, Tatiana F Vepkhvadze, Egor M Lednev, Olga L Vinogradova, Daniil V Popov
We tested whether post exercise ingestion of branched-chain amino acids (BCAA < 10 g) is sufficient to activate signaling associated with muscle protein synthesis and suppress exercise-induced activation of mechanisms associated with proteolysis in endurance-trained human skeletal muscle. Nine endurance-trained athletes performed a cycling bout with and without BCAA ingestion (0.1 g/kg). Post exercise ACCSer79/222 phosphorylation (endogenous marker of AMPK activity) was increased (~3-fold, P < 0...
January 2018: Journal of Physiological Sciences: JPS
https://www.readbyqxmd.com/read/27126641/mouse-genome-wide-association-study-identifies-polymorphisms-on-chromosomes-4-11-and-15-for-age-related-cardiac-fibrosis
#12
Qiaoli Li, Annerose Berndt, Beth A Sundberg, Kathleen A Silva, Victoria E Kennedy, Clinton L Cario, Matthew A Richardson, Thomas H Chase, Paul N Schofield, Jouni Uitto, John P Sundberg
Dystrophic cardiac calcinosis (DCC), also called epicardial and myocardial fibrosis and mineralization, has been detected in mice of a number of laboratory inbred strains, most commonly C3H/HeJ and DBA/2J. In previous mouse breeding studies between these DCC susceptible and the DCC-resistant strain C57BL/6J, 4 genetic loci harboring genes involved in DCC inheritance were identified and subsequently termed Dyscalc loci 1 through 4. Here, we report susceptibility to cardiac fibrosis, a sub-phenotype of DCC, at 12 and 20 months of age and close to natural death in a survey of 28 inbred mouse strains...
June 2016: Mammalian Genome: Official Journal of the International Mammalian Genome Society
https://www.readbyqxmd.com/read/26919175/transcriptional-activator-tap63-is-upregulated-in-muscular-atrophy-during-als-and-induces-the-pro-atrophic-ubiquitin-ligase-trim63
#13
Yannick von Grabowiecki, Paula Abreu, Orphee Blanchard, Lavinia Palamiuc, Samir Benosman, Sophie Mériaux, Véronique Devignot, Isabelle Gross, Georg Mellitzer, José L Gonzalez de Aguilar, Christian Gaiddon
Mechanisms of muscle atrophy are complex and their understanding might help finding therapeutic solutions for pathologies such as amyotrophic lateral sclerosis (ALS). We meta-analyzed transcriptomic experiments of muscles of ALS patients and mouse models, uncovering a p53 deregulation as common denominator. We then characterized the induction of several p53 family members (p53, p63, p73) and a correlation between the levels of p53 family target genes and the severity of muscle atrophy in ALS patients and mice...
February 26, 2016: ELife
https://www.readbyqxmd.com/read/26818585/skeletal-muscle-atrogene-expression-and-insulin-resistance-in-a-rat-model-of-polytrauma
#14
Robert M Akscyn, John L Franklin, Tatyana A Gavrikova, Joseph L Messina
Polytrauma is a combination of injuries to more than one body part or organ system. Polytrauma is common in warfare, and in automobile and industrial accidents. The combination of injuries can include burn, fracture, hemorrhage, and trauma to the extremities or specific organ systems. Resistance to anabolic hormones, loss of muscle mass, and metabolic dysfunction can occur following injury. To investigate the effects of combined injuries, we have developed a highly reproducible rodent model of polytrauma. This model combines burn injury, soft tissue trauma, and penetrating injury to the gastrointestinal (GI) tract...
February 2016: Physiological Reports
https://www.readbyqxmd.com/read/26489459/new-functional-signatures-for-understanding-melanoma-biology-from-tumor-cell-lineage-specific-analysis
#15
Florian Rambow, Bastien Job, Valérie Petit, Franck Gesbert, Véronique Delmas, Hannah Seberg, Guillaume Meurice, Eric Van Otterloo, Philippe Dessen, Caroline Robert, Daniel Gautheret, Robert A Cornell, Alain Sarasin, Lionel Larue
Molecular signatures specific to particular tumor types are required to design treatments for resistant tumors. However, it remains unclear whether tumors and corresponding cell lines used for drug development share such signatures. We developed similarity core analysis (SCA), a universal and unsupervised computational framework for extracting core molecular features common to tumors and cell lines. We applied SCA to mRNA/miRNA expression data from various sources, comparing melanoma cell lines and metastases...
October 27, 2015: Cell Reports
https://www.readbyqxmd.com/read/26329309/in-silico-analysis-of-the-molecular-mechanism-of-postmenopausal-osteoporosis
#16
Yanqing Liu, Yueqiu Wang, Nailong Yang, Suning Wu, Yanhua Lv, Lili Xu
Postmenopausal osteoporosis (PO) is a common disease in females >50 years of age worldwide and is becoming an increasing burden to society. The present study aimed to assess the molecular mechanism of PO using bioinformatic methods. The gene expression data from patients with PO and normal controls were downloaded from the ArrayExpress database provided by European Bioinformatics Institute. Following the screening of the differentially expressed genes (DEGs) using the Limma package in R language, Kyoto Encyclopedia of Genes and Genomes pathways enrichment analysis was performed using the Database for Annotation, Visualization and Integrated Discovery online tools...
November 2015: Molecular Medicine Reports
https://www.readbyqxmd.com/read/25961010/induction-of-ankrd1-in-dilated-cardiomyopathy-correlates-with-the-heart-failure-progression
#17
Julius Bogomolovas, Kathrin Brohm, Jelena Čelutkienė, Giedrė Balčiūnaitė, Daiva Bironaitė, Virginija Bukelskienė, Dainius Daunoravičus, Christian C Witt, Jens Fielitz, Virginija Grabauskienė, Siegfried Labeit
Progression of idiopathic dilated cardiomyopathy (IDCM) is marked with extensive left ventricular remodeling whose clinical manifestations and molecular basis are poorly understood. We aimed to evaluate the clinical potential of titin ligands in monitoring progression of cardiac remodeling associated with end-stage IDCM. Expression patterns of 8 mechanoptotic machinery-associated titin ligands (ANKRD1, ANKRD2, TRIM63, TRIM55, NBR1, MLP, FHL2, and TCAP) were quantitated in endomyocardial biopsies from 25 patients with advanced IDCM...
2015: BioMed Research International
https://www.readbyqxmd.com/read/25950827/identification-of-genes-expressed-in-hyperpigmented-skin-using-meta-analysis-of-microarray-data-sets
#18
Lanlan Yin, Sergio G Coelho, Julio C Valencia, Dominik Ebsen, Andre Mahns, Christoph Smuda, Sharon A Miller, Janusz Z Beer, Ludger Kolbe, Vincent J Hearing
More than 375 genes have been identified that are involved in regulating skin pigmentation and these act during development, survival, differentiation, and/or responses of melanocytes to the environment. Many of these genes have been cloned, and disruptions of their functions are associated with various pigmentary diseases; however, many remain to be identified. We have performed a series of microarray analyses of hyperpigmented compared with less pigmented skin to identify genes responsible for these differences...
October 2015: Journal of Investigative Dermatology
https://www.readbyqxmd.com/read/25801283/new-cardiac-and-skeletal-protein-aggregate-myopathy-associated-with-combined-murf1-and-murf3-mutations
#19
Montse Olivé, Saba Abdul-Hussein, Anders Oldfors, José González-Costello, Peter F M van der Ven, Dieter O Fürst, Laura González, Dolores Moreno, Benjamín Torrejón-Escribano, Josefina Alió, Adolf Pou, Isidro Ferrer, Homa Tajsharghi
Protein aggregate myopathies (PAMs) define muscle disorders characterized by protein accumulation in muscle fibres. We describe a new PAM in a patient with proximal muscle weakness and hypertrophic cardiomyopathy, whose muscle fibres contained inclusions containing myosin and myosin-associated proteins, and aberrant distribution of microtubules. These lesions appear as intact A- and M-bands lacking thin filaments and Z-discs. These features differ from inclusions in myosin storage myopathy (MSM), but are highly similar to those in mice deficient for the muscle-specific RING finger proteins MuRF1 and MuRF3...
July 1, 2015: Human Molecular Genetics
https://www.readbyqxmd.com/read/25605333/the-orphan-nuclear-receptor-nur77-is-a-determinant-of-myofiber-size-and-muscle-mass-in-mice
#20
Peter Tontonoz, Omar Cortez-Toledo, Kevin Wroblewski, Cynthia Hong, Laura Lim, Rogelio Carranza, Orla Conneely, Daniel Metzger, Lily C Chao
We previously showed that the orphan nuclear receptor Nur77 (Nr4a1) plays an important role in the regulation of glucose homeostasis and oxidative metabolism in skeletal muscle. Here, we show using both gain- and loss-of-function models that Nur77 is also a regulator of muscle growth in mice. Transgenic expression of Nur77 in skeletal muscle in mice led to increases in myofiber size. Conversely, mice with global or muscle-specific deficiency in Nur77 exhibited reduced muscle mass and myofiber size. In contrast to Nur77 deficiency, deletion of the highly related nuclear receptor NOR1 (Nr4a3) had minimal effect on muscle mass and myofiber size...
April 2015: Molecular and Cellular Biology
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