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https://www.readbyqxmd.com/read/29664744/the-impact-of-aerobic-exercise-on-the-muscle-stem-cell-response
#1
Sophie Joanisse, Tim Snijders, Joshua P Nederveen, Gianni Parise
Satellite cells are indispensable for skeletal muscle repair and regeneration and are associated with muscle growth in humans. Aerobic exercise training results in improved skeletal muscle health also translating to an increase in satellite cell pool activation. We postulate that aerobic exercise improves satellite cell function in skeletal muscle.
April 16, 2018: Exercise and Sport Sciences Reviews
https://www.readbyqxmd.com/read/29662554/effect-of-%C3%AE-hydroxy-%C3%AE-methylbutyrate-on-mirna-expression-in-differentiating-equine-satellite-cells-exposed-to-hydrogen-peroxide
#2
Karolina A Chodkowska, Anna Ciecierska, Kinga Majchrzak, Piotr Ostaszewski, Tomasz Sadkowski
Background: Skeletal muscle injury activates satellite cells to initiate processes of proliferation, differentiation, and hypertrophy in order to regenerate muscle fibers. The number of microRNAs and their target genes are engaged in satellite cell activation. β-Hydroxy-β-methylbutyrate (HMB) is known to prevent exercise-induced muscle damage. The purpose of this study was to evaluate the effect of HMB on miRNA and relevant target gene expression in differentiating equine satellite cells exposed to H2 O2 ...
2018: Genes & Nutrition
https://www.readbyqxmd.com/read/29659725/bone-morphogenetic-proteins-bmps-satellite-cells-and-sarcopenia-perspective-in-translational-medicine
#3
Umberto Tarantino, Manuel Scimeca
No abstract text is available yet for this article.
April 12, 2018: Journals of Gerontology. Series A, Biological Sciences and Medical Sciences
https://www.readbyqxmd.com/read/29659542/secure-and-usable-user-in-a-context-continuous-authentication-in-smartphones-leveraging-non-assisted-sensors
#4
Jose Maria de Fuentes, Lorena Gonzalez-Manzano, Arturo Ribagorda
Smartphones are equipped with a set of sensors that describe the environment (e.g., GPS, noise, etc.) and their current status and usage (e.g., battery consumption, accelerometer readings, etc.). Several works have already addressed how to leverage such data for user-in-a-context continuous authentication, i.e., determining if the porting user is the authorized one and resides in his regular physical environment. This can be useful for an early reaction against robbery or impersonation. However, most previous works depend on assisted sensors, i...
April 16, 2018: Sensors
https://www.readbyqxmd.com/read/29652692/potential-roles-of-vascular-endothelial-growth-factor-during-skeletal-muscle-hypertrophy
#5
Kimberly A Huey
Vascular endothelial growth factor (VEGF) deletion in adult mouse muscle fibers contributes to impaired contractile and muscular adaptations to a hypertrophic stimulus suggesting a critical role in adult muscle growth. This review will explore the hypothesis that VEGF is essential for adult muscle growth by impacting inflammatory processes, satellite-endothelial cell interactions, and contractile protein accumulation by functioning within known hypertrophic signaling pathways including insulin-like growth factor-1 (IGF-1-Akt) and Wnt-ß-catenin...
April 12, 2018: Exercise and Sport Sciences Reviews
https://www.readbyqxmd.com/read/29652595/stem-cells-for-skeletal-muscle-tissue-engineering
#6
Molly N Pantellic, Lisa Marie Larkin
Volumetric muscle loss (VML) is a debilitating condition wherein muscle loss overwhelms the body's normal physiological repair mechanism. VML is particularly common among military service members who have sustained war injuries. Because of the high social and medical cost associated with VML and suboptimal current surgical treatments, there is great interest in developing better VML therapies. Skeletal muscle tissue engineering (SMTE) is a promising alternative to traditional VML surgical treatments that use autogenic tissue grafts, and rather uses isolated stem cells with myogenic potential to generate de novo skeletal muscle tissues to treat VML...
March 14, 2018: Tissue Engineering. Part B, Reviews
https://www.readbyqxmd.com/read/29651864/exogenous-skeletal-muscle-satellite-cells-promote-the-repair-of-levator-palpebrae-superioris-mechanical-damage-in-rat
#7
Lin Ye, Yuanyuan Yao, Hui Guo, Yun Peng
AIM OF THE STUDY: Blepharoptosis is a drooping of the upper eyelid, usually due to dysfunction of the levator palpebrae superioris (LPS). Recently, skeletal muscle satellite cells (SSCs) have been reported to promote the repair of damaged skeletal muscle. This study aims to investigate the potential contribution of exogenous SSCs to the regeneration of mechanically damaged LPS. MATERIALS AND METHODS: Thirty-two rats were randomly divided into four groups, including control group, SSCs-treated group, SSCs-treated injury group and non-treated injury group...
April 13, 2018: Connective Tissue Research
https://www.readbyqxmd.com/read/29651539/skeletal-muscle-stem-cell-characteristics-and-myonuclei-content-in-patients-with-rheumatoid-arthritis-a-cross-sectional-study
#8
Rasmus Jentoft Boutrup, Jean Farup, Kristian Vissing, Michael Kjaer, Ulla Ramer Mikkelsen
To investigate satellite cells (SCs) and myonuclei characteristics in patients with rheumatoid arthritis (RA). Resting biopsies from m. vastus lateralis were obtained from thirteen RA patients and thirteen matched healthy controls (CON). Muscle biopsies were immunohistochemically stained and analyzed for fiber type specific content of SCs (Pax7+ ), proliferating SCs (Pax7+ /MyoD+ ) and differentiating SCs (myogenin+ ). Furthermore, we quantified fiber type specific content of myonuclei and myofiber cross-sectional area (CSA)...
April 12, 2018: Rheumatology International
https://www.readbyqxmd.com/read/29643389/histone-h3-3-sub-variant-h3mm7-is-required-for-normal-skeletal-muscle-regeneration
#9
Akihito Harada, Kazumitsu Maehara, Yusuke Ono, Hiroyuki Taguchi, Kiyoshi Yoshioka, Yasuo Kitajima, Yan Xie, Yuko Sato, Takeshi Iwasaki, Jumpei Nogami, Seiji Okada, Tetsuro Komatsu, Yuichiro Semba, Tatsuya Takemoto, Hiroshi Kimura, Hitoshi Kurumizaka, Yasuyuki Ohkawa
Regulation of gene expression requires selective incorporation of histone H3 variant H3.3 into chromatin. Histone H3.3 has several subsidiary variants but their functions are unclear. Here we characterize the function of histone H3.3 sub-variant, H3mm7, which is expressed in skeletal muscle satellite cells. H3mm7 knockout mice demonstrate an essential role of H3mm7 in skeletal muscle regeneration. Chromatin analysis reveals that H3mm7 facilitates transcription by forming an open chromatin structure around promoter regions including those of myogenic genes...
April 11, 2018: Nature Communications
https://www.readbyqxmd.com/read/29629869/a-population-of-adult-satellite-like-cells-in-drosophila-is-maintained-through-a-switch-in-rna-isoforms
#10
Hadi Boukhatmi, Sarah Bray
Adult stem cells are important for tissue maintenance and repair. One key question is how such cells are specified and then protected from differentiation for a prolonged period. Investigating the maintenance of Drosophila muscle progenitors (MPs) we demonstrate that it involves a switch in zfh1/ZEB1 RNA-isoforms. Differentiation into functional muscles is accompanied by expression of miR-8/miR-200 , which targets the major zfh1-long RNA isoform and decreases Zfh1 protein. Through activity of the Notch pathway, a subset of MPs produce an alternate zfh1-short isoform, which lacks the miR-8 seed site...
April 9, 2018: ELife
https://www.readbyqxmd.com/read/29627970/merkel-cell-carcinoma-in-the-community-setting-a-case-report
#11
Cameron M Callaghan, Rumpa Amornmarn
Merkel cell carcinoma (MCC) is a rare neuroendocrine tumor of the skin initially believed to arise from the Merkel cells. In the community setting a general radiation oncologist may only encounter this pathology in a handful of cases over the course of their career. Due to the low incidence of this malignancy, few prospective randomized controlled trials have ever been conducted and therefore guidelines are based on relatively lower levels of evidence upon which the clinical recommendations are made. We discuss the case of a female in her 90s presenting with a classic MCC primary lesion, as well as satellite lesions proximal to both the primary and the draining regional lymph nodes with no evidence of nodal involvement...
April 12, 2018: Radiation Oncology Journal
https://www.readbyqxmd.com/read/29626931/who-needs-this-junk-or-genomic-dark-matter
#12
REVIEW
O I Podgornaya, D I Ostromyshenskii, N I Enukashvily
Centromeres (CEN), pericentromeric regions (periCEN), and subtelomeric regions (subTel) comprise the areas of constitutive heterochromatin (HChr). Tandem repeats (TRs or satellite DNA) are the main components of HChr forming no less than 10% of the mouse and human genome. HChr is assembled within distinct structures in the interphase nuclei of many species - chromocenters. In this review, the main classes of HChr repeat sequences are considered in the order of their number increase in the sequencing reads of the mouse chromocenters (ChrmC)...
April 2018: Biochemistry. Biokhimii︠a︡
https://www.readbyqxmd.com/read/29626652/participation-of-satellite-glial-cells-of-the-dorsal-root-ganglia-in-acute-nociception
#13
Júlia Borges Paes Lemes, Tais de Campos Lima, Débora Oliveira Santos, Amanda Ferreira Neves, Fernando Silva de Oliveira, Carlos Almicar Parada, Celina Monteiro da Cruz Lotufo
At dorsal root ganglia, neurons and satellite glial cells (SGC) can communicate through ATP release and P2X7 receptor activation. SGCs are also interconnected by gap junctions and have been previously implicated in modulating inflammatory and chronic pain.We now present evidence that SGCs are also involved in processing acute nociception in rat dorsal root ganglia. Using primary dorsal root ganglia cultures we observed that calcium transients induced in neurons by capsaicin administration were followed by satellite glial cells activation...
April 4, 2018: Neuroscience Letters
https://www.readbyqxmd.com/read/29626498/interaction-of-fluorescently-labeled-pyrrole-imidazole-polyamide-probes-with-fixed-and-living-murine-and-human-cells
#14
Karine Nozeret, François Loll, Gildas Mouta Cardoso, Christophe Escudé, Alexandre S Boutorine
Pericentromeric heterochromatin plays important roles in controlling gene expression and cellular differentiation. Fluorescent pyrrole-imidazole polyamides targeting murine pericentromeric DNA (major satellites) can be used for the visualization of pericentromeric heterochromatin foci in live mouse cells. New derivatives targeting human repeated DNA sequences (α-satellites) were synthesized and their interaction with target DNA was characterized. The possibility to use major satellite and α -satellite binding polyamides as tools for staining pericentromeric heterochromatin was further investigated in fixed and living mouse and human cells...
April 4, 2018: Biochimie
https://www.readbyqxmd.com/read/29625618/exposure-to-radial-extracorporeal-shock-waves-modulates-viability-and-gene-expression-of-human-skeletal-muscle-cells-a-controlled-in-vitro-study
#15
Stefan G Mattyasovszky, Eva K Langendorf, Ulrike Ritz, Christoph Schmitz, Irene Schmidtmann, Tobias E Nowak, Daniel Wagner, Alexander Hofmann, Pol M Rommens, Philipp Drees
BACKGROUND: Recent clinical and animal studies have shown that extracorporeal shock wave therapy has a promoting influence on the healing process of musculoskeletal disorders. However, the underlying biological effects of extracorporeal shock wave therapy on human skeletal muscle cells have not yet been investigated. METHODS: In this study, we investigated human skeletal muscle cells after exposure to radial extracorporeal shock waves in a standardized in vitro setup...
April 6, 2018: Journal of Orthopaedic Surgery and Research
https://www.readbyqxmd.com/read/29621587/bta-mir-378-promote-the-differentiation-of-bovine-skeletal-muscle-derived-satellite-cells
#16
HuiLi Tong, RunYing Jiang, TingTing Liu, Yao Wei, ShuFeng Li, YunQin Yan
The mechanism by which bta-miR-378 regulates bovine skeletal muscle-derived satellite cell (bMDSC) myogenesis remains unknown. In this study, stem-loop RT-PCR was used to assess bta-miR-378 expression during the proliferation and differentiation of bMDSCs. The results showed that bta-miR-378 expression did not obviously change during bMDSC proliferation but increased significantly when bMDSCs began to differentiate. Then, a bta-miR-378 mimic (bta-miR-378-M) and bta-miR-378 inhibitor (bta-miR-378-I) were transfected into bMDSCs to explore the effect of bta-miR-378 on bMDSC differentiation...
April 2, 2018: Gene
https://www.readbyqxmd.com/read/29621305/biomarkers-associated-with-low-moderate-and-high-vastus-lateralis-muscle-hypertrophy-following-12-weeks-of-resistance-training
#17
Christopher B Mobley, Cody T Haun, Paul A Roberson, Petey W Mumford, Wesley C Kephart, Matthew A Romero, Shelby C Osburn, Christopher G Vann, Kaelin C Young, Darren T Beck, Jeffrey S Martin, Christopher M Lockwood, Michael D Roberts
We sought to identify biomarkers which delineated individual hypertrophic responses to resistance training. Untrained, college-aged males engaged in full-body resistance training (3 d/wk) for 12 weeks. Body composition via dual x-ray absorptiometry (DXA), vastus lateralis (VL) thickness via ultrasound, blood, VL muscle biopsies, and three-repetition maximum (3-RM) squat strength were obtained prior to (PRE) and following (POST) 12 weeks of training. K-means cluster analysis based on VL thickness changes identified LOW [n = 17; change (mean±SD) = +0...
2018: PloS One
https://www.readbyqxmd.com/read/29617946/long-term-selection-of-chickens-for-body-weight-alters-muscle-satellite-cell-behaviors
#18
A E Geiger, M R Daughtry, C M Gow, P B Siegel, H Shi, D E Gerrard
Muscle satellite cells (SC) are resident stem-like cells that play an integral role in skeletal muscle growth and repair. Understanding how SC maintain their identities and dynamic properties is critical to animal growth. However, the genetic and environmental factors governing SC behaviors and the underpinning mechanisms remain unknown. To explore whether genetic selection influences SC behaviors, we used 2 lines of chickens selected for over 50 generations with over a 10-fold difference in body weight at 56 d of age-the Virginia high weight selection (HWS) and low weight selection (LWS) lines...
April 3, 2018: Poultry Science
https://www.readbyqxmd.com/read/29615899/extracellular-guanosine-5-triphosphate-induces-human-muscle-satellite-cells-to-release-exosomes-stuffed-with-guanosine
#19
Tiziana Pietrangelo, Ester S Di Filippo, Marcello Locatelli, Francesco Piacenza, Marco Farina, Eleonora Pavoni, Andrea Di Donato, Denise Innosa, Mauro Provinciali, Stefania Fulle
The extracellular guanosine 5'-triphosphate, GTP, has been demonstrated to be an enhancer of myogenic cell differentiation in a murine cell line, not yet in human muscle cells. Our hypothesis was that GTP could influence also human skeletal muscle regeneration, specifically in the first phases. We tested GTP stimulus on human muscle precursor cells established in culture by human satellite cells derived from Vastus Lateralis of three young male. Our data show that extracellular GTP (a) up-regulated miRNA (specifically miR133a and miR133b) and myogenic regulator factor and (b) induces human myogenic precursor cells to release exosomes stuffed with guanosine based molecules (mainly guanosine) in the extracellular milieu...
2018: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/29603757/extracellular-matrix-scaffolds-for-treatment-of-large-volume-muscle-injuries-a-review
#20
REVIEW
Tiffany L Sarrafian, Sue C Bodine, Brian Murphy, J Kevin Grayson, Susan M Stover
OBJECTIVE: Large muscular or musculotendinous defects present a dilemma because of the inadequacies of current treatment strategies. Extracellular matrices (ECM) are potential clinically applicable regenerative biomaterials. This review summarizes information from the preclinical literature evaluating the use of ECM for muscle regeneration in animal models of volumetric muscle loss (VML). STUDY DESIGN: Literature review. SAMPLE POPULATION: Animal models of VML in which surgical repair was performed with an ECM product, with or without added cell populations...
March 30, 2018: Veterinary Surgery: VS
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