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Muscular Regeneration

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https://www.readbyqxmd.com/read/28716587/botulinum-neurotoxin-a-promotes-functional-recovery-after-peripheral-nerve-injury-by-increasing-regeneration-of-myelinated-fibers
#1
Stefano Cobianchi, Jessica Jaramillo, Siro Luvisetto, Flaminia Pavone, Xavier Navarro
The injection of safe doses of botulinum neurotoxin A (BoNT/A) have been reported to be useful for the treatment of neuropathic pain, but it is still unknown how functional recovery is induced after peripheral nerve injury. We evaluated the effects of intranerve application of BoNT/A, on regeneration and sensorimotor functional recovery in partial and complete peripheral nerve injuries in the mouse. After sciatic nerve crush (SNC) and intranerve delivery of BoNT/A (15 pg), axonal regeneration was measured by nerve pinch test at different days...
July 14, 2017: Neuroscience
https://www.readbyqxmd.com/read/28713664/cdk-inhibitors-for-muscle-stem-cell-differentiation-and-self-renewal
#2
Amrudha Mohan, Atsushi Asakura
Regeneration of muscle is undertaken by muscle stem cell populations named satellite cells which are normally quiescent or at the G0 phase of the cell cycle. However, upon signals from damaged muscle, satellite cells lose their quiescence, and enter the G1 cell cycle phase to expand the population of satellite cell progenies termed myogenic precursor cells (MPCs). Eventually, MPCs stop their cell cycle and undergo terminal differentiation to form skeletal muscle fibers. Some MPCs retract to quiescent satellite cells as a self-renewal process...
2017: J Phys Fit Sports Med
https://www.readbyqxmd.com/read/28709001/ciliary-hedgehog-signaling-restricts-injury-induced-adipogenesis
#3
Daniel Kopinke, Elle C Roberson, Jeremy F Reiter
Injured skeletal muscle regenerates, but with age or in muscular dystrophies, muscle is replaced by fat. Upon injury, muscle-resident fibro/adipogenic progenitors (FAPs) proliferated and gave rise to adipocytes. These FAPs dynamically produced primary cilia, structures that transduce intercellular cues such as Hedgehog (Hh) signals. Genetically removing cilia from FAPs inhibited intramuscular adipogenesis, both after injury and in a mouse model of Duchenne muscular dystrophy. Blocking FAP ciliation also enhanced myofiber regeneration after injury and reduced myofiber size decline in the muscular dystrophy model...
July 13, 2017: Cell
https://www.readbyqxmd.com/read/28702326/rev-erb-co-regulates-muscle-regeneration-via-tethered-interaction-with-the-nf-y-cistrome
#4
Ryan D Welch, Chun Guo, Monideepa Sengupta, Katherine J Carpenter, Natalie A Stephens, Stacy A Arnett, Marvin J Meyers, Lauren M Sparks, Steven R Smith, Jinsong Zhang, Thomas P Burris, Colin A Flaveny
OBJECTIVE: The loss of skeletal muscle mass and strength are a central feature of traumatic injury and degenerative myopathies. Unfortunately, pharmacological interventions typically fail to stem the long-term decline in quality of life. Reduced Rev-Erb-mediated gene suppression in cultured C2C12 myoblasts has been shown to stimulate myoblast differentiation. Yet the mechanisms that allow Rev-Erb to pleiotropically inhibit muscle differentiation are not well understood. In this study, we sought to elucidate the role of Rev-Erb in the regulation of muscle differentiation and regeneration in vivo...
July 2017: Molecular Metabolism
https://www.readbyqxmd.com/read/28698718/the-holy-grail-of-orthopedic-surgery-mesenchymal-stem-cells-their-current-uses-and-potential-applications
#5
REVIEW
Roberto Berebichez-Fridman, Ricardo Gómez-García, Julio Granados-Montiel, Enrique Berebichez-Fastlicht, Anell Olivos-Meza, Julio Granados, Cristina Velasquillo, Clemente Ibarra
Only select tissues and organs are able to spontaneously regenerate after disease or trauma, and this regenerative capacity diminishes over time. Human stem cell research explores therapeutic regenerative approaches to treat various conditions. Mesenchymal stem cells (MSCs) are derived from adult stem cells; they are multipotent and exert anti-inflammatory and immunomodulatory effects. They can differentiate into multiple cell types of the mesenchyme, for example, endothelial cells, osteoblasts, chondrocytes, fibroblasts, tenocytes, vascular smooth muscle cells, and sarcomere muscular cells...
2017: Stem Cells International
https://www.readbyqxmd.com/read/28665378/-the-application-of-general-magnetic-therapy-for-the-rehabilitation-of-the-patients-following-the-surgical-treatment-of-herniated-intervertebral-discs
#6
D D Voronina, A G Kulikov, I A Luppova, O V Yarustovskaya
AIM: The objective of the present work was to rehabilitate more efficiently the patients who had undergone the surgical treatment for herniated discs in the lumbosacral spine by applying general magnetic therapy during the combined treatment. MATERIAL AND METHODS: A total of 73 patients underwent the medical examination and treatment. The patients matched for age and sex presenting with similar clinical symptoms were divided into two groups. All of them received initial therapy that included medication, therapeutic physical exercises, and aquatic therapy...
2017: Voprosy Kurortologii, Fizioterapii, i Lechebnoĭ Fizicheskoĭ Kultury
https://www.readbyqxmd.com/read/28654079/in-situ-immunofluorescent-staining-of-autophagy-in-muscle-stem-cells
#7
Francesco Castagnetti, Elisabetta Fiacco, Carol Imbriano, Lucia Latella
Increasing evidence points to autophagy as a crucial regulatory process to preserve tissue homeostasis. It is known that autophagy is involved in skeletal muscle development and regeneration, and the autophagic process has been described in several muscular pathologies and age-related muscle disorders. A recently described block of the autophagic process that correlates with the functional exhaustion of satellite cells during muscle repair supports the notion that active autophagy is coupled with productive muscle regeneration...
June 12, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28623422/effects-of-omega-3-on-matrix-metalloproteinase-9-myoblast-transplantation-and-satellite-cell-activation-in-dystrophin-deficient-muscle-fibers
#8
Samara Camaçari de Carvalho, Sajedah M Hindi, Ashok Kumar, Maria Julia Marques
In Duchenne muscular dystrophy (DMD), lack of dystrophin leads to progressive muscle degeneration, with DMD patients suffering from cardiorespiratory failure. Cell therapy is an alternative to life-long corticoid therapy. Satellite cells, the stem cells of skeletal muscles, do not completely compensate for the muscle damage in dystrophic muscles. Elevated levels of proinflammatory and profibrotic factors, such as metalloproteinase 9 (MMP-9), impair muscle regeneration, leading to extensive fibrosis and poor results with myoblast transplantation therapies...
June 17, 2017: Cell and Tissue Research
https://www.readbyqxmd.com/read/28618254/platelet-derived-growth-factor-bb-influences-muscle-regeneration-in-duchenne-muscle-dystrophy
#9
Patricia Piñol-Jurado, Eduard Gallardo, Noemi de Luna, Xavier Suárez-Calvet, Carles Sánchez-Riera, Esther Fernández-Simón, Clara Gomis, Isabel Illa, Jordi Díaz-Manera
Duchenne muscular dystrophy (DMD) is characterized by a progressive loss of muscle fibers, and their substitution by fibrotic and adipose tissue. Many factors contribute to this process, but the molecular pathways related to regeneration and degeneration of muscle are not completely known. Platelet-derived growth factor (PDGF)-BB belongs to a family of growth factors that regulate proliferation, migration, and differentiation of mesenchymal cells. The role of PDGF-BB in muscle regeneration in humans has not been studied...
June 12, 2017: American Journal of Pathology
https://www.readbyqxmd.com/read/28618138/expansion-of-umbilical-cord-blood-aldehyde-dehydrogenase-expressing-cells-generates-myeloid-progenitor-cells-that-stimulate-limb-revascularization
#10
David M Putman, Tyler T Cooper, Stephen E Sherman, Ayesh K Seneviratne, Mark Hewitt, Gillian I Bell, David A Hess
Uncompromised by chronic disease-related comorbidities, human umbilical cord blood (UCB) progenitor cells with high aldehyde dehydrogenase activity (ALDH(hi) cells) stimulate blood vessel regeneration after intra-muscular transplantation. However, implementation of cellular therapies using UCB ALDH(hi) cells for critical limb ischemia, the most severe form of severe peripheral artery disease, is limited by the rarity (<0.5%) of these cells. Our goal was to generate a clinically-translatable, allogeneic cell population for vessel regenerative therapies, via ex vivo expansion of UCB ALDH(hi) cells without loss of pro-angiogenic potency...
June 15, 2017: Stem Cells Translational Medicine
https://www.readbyqxmd.com/read/28616376/genome-editing-and-muscle-stem-cells-as-a-therapeutic-tool-for-muscular-dystrophies
#11
REVIEW
Veronica Pini, Jennifer E Morgan, Francesco Muntoni, Helen C O'Neill
PURPOSE OF REVIEW: Muscular dystrophies are a group of severe degenerative disorders characterized by muscle fiber degeneration and death. Therapies designed to restore muscle homeostasis and to replace dying fibers are being experimented, but none of those in clinical trials are suitable to permanently address individual gene mutation. The purpose of this review is to discuss genome editing tools such as CRISPR/Cas (clustered regularly interspaced short palindromic repeats/CRISPR-associated), which enable direct sequence alteration and could potentially be adopted to correct the genetic defect leading to muscle impairment...
2017: Current Stem Cell Reports
https://www.readbyqxmd.com/read/28615804/the-neurochemistry-of-peripheral-nerve-regeneration
#12
Andreea Benga, Fatih Zor, Ahmet Korkmaz, Bogdan Marinescu, Vijay Gorantla
Peripheral nerve injuries (PNIs) can be most disabling, resulting in the loss of sensitivity, motor function and autonomic control in the involved anatomical segment. Although injured peripheral nerves are capable of regeneration, sub-optimal recovery of function is seen even with the best reconstruction. Distal axonal degeneration is an unavoidable consequence of PNI. There are currently few strategies aimed to maintain the distal pathway and/or target fidelity during regeneration across the zone of injury...
January 2017: Indian Journal of Plastic Surgery: Official Publication of the Association of Plastic Surgeons of India
https://www.readbyqxmd.com/read/28614767/changes-in-caveolin-1-caveolin-3-and-vascular-endothelial-growth-factor-expression-and-protein-content-after-botulinum-toxin-a-injection-in-the-right-masseter-muscle-of-dystrophin-deficient-mdx-mice
#13
U U Botzenhart, V Vaal, I Rentzsch, T Gredes, T Gedrange, C Kunert-Keil
Progressive muscle wasting, frequently associated with inflammation, muscle fibre degeneration and fibrosis, is a characteristic of DMD (Duchenne muscular dystrophy). Its most common used animal model, the mdx mouse, however can overcome muscle degeneration by regeneration processes and is for this reason not suitable to answer all scientific questions. The aim of this study was to evaluate the ability of botulinum toxin A (BTX-A) in breaking down muscle regeneration in mdx mice. For this purpose, the right masseter muscle of 100 days old mdx and healthy mice was paralyzed by a single specific intramuscular injection of BTX-A...
April 2017: Journal of Physiology and Pharmacology: An Official Journal of the Polish Physiological Society
https://www.readbyqxmd.com/read/28607396/cxcl12-and-osteopontin-from-bone-marrow-derived-mesenchymal-stromal-cells-improve-muscle-regeneration
#14
Yasushi Maeda, Yasuhiro Yonemochi, Yuki Nakajyo, Hideaki Hidaka, Tokunori Ikeda, Yukio Ando
Muscle satellite cells are essential for muscle regeneration. However, efficient regeneration does not occur without muscle-resident mesenchymal progenitor cells. We show here that bone marrow-derived mesenchymal stromal cells (Bm-MSCs) also facilitate muscle regeneration in Duchenne muscular dystrophy (DMD) model mice. Bm-MSCs transplanted into peritoneal cavities of DMD model mice with severe muscle degeneration strongly suppressed dystrophic pathology and improved death-related symptoms, which resulted in dramatic lifespan extension...
June 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28599613/immunohistochemical-analysis-of-canine-and-feline-muscle-disorders-using-formalin-fixed-paraffin-embedded-tissues
#15
Takanori Shiga, Kazuyuki Uchida, James K Chambers, Hiroyuki Nakayama
Histochemical techniques used in examination of muscle biopsies typically require frozen sections. Given that most of the specimens submitted to a veterinary laboratory for diagnosis are formalin-fixed, the choice of staining methods is limited. We aimed to further advance the diagnostic capabilities of pathologists presented with formalin-fixed muscle samples and to describe the differences in immunohistopathologic findings between neurogenic and myogenic muscle disorders. Based on hematoxylin and eosin staining, we defined in dogs the histologic lesions in 4 neurogenic disorders (degenerative myelopathy and polyneuropathy) and 2 myogenic disorders (dystrophin-deficient muscular dystrophy)...
June 1, 2017: Journal of Veterinary Diagnostic Investigation
https://www.readbyqxmd.com/read/28596337/cardiac-regeneration-strategies-staying-young-at-heart
#16
REVIEW
Eldad Tzahor, Kenneth D Poss
The human heart is continually operating as a muscular pump, contracting, on average, 80 times per minute to propel 8000 liters of blood through body tissues each day. Whereas damaged skeletal muscle has a profound capacity to regenerate, heart muscle, at least in mammals, has poor regenerative potential. This deficiency is attributable to the lack of resident cardiac stem cells, combined with roadblocks that limit adult cardiomyocytes from entering the cell cycle and completing division. Insights for regeneration have recently emerged from studies of animals with an elevated innate capacity for regeneration, the innovation of stem cell and reprogramming technologies, and a clearer understanding of the cardiomyocyte genetic program and key extrinsic signals...
June 9, 2017: Science
https://www.readbyqxmd.com/read/28595270/spp1-genotype-and-glucocorticoid-treatment-modify-osteopontin-expression-in-duchenne-muscular-dystrophy-cells
#17
Sara Vianello, Boris Pantic, Aurora Fusto, Luca Bello, Eva Galletta, Doriana Borgia, Bruno F Gavassini, Claudio Semplicini, Gianni Sorarù, Libero Vitiello, Elena Pegoraro
Glucocorticoids are beneficial in Duchenne muscular dystrophy (DMD). Osteopontin (OPN), the protein product of SPP1, plays a role in DMD pathology modulating muscle inflammation and regeneration. A polymorphism in the SPP1 promoter (rs28357094) has been recognized as a genetic modifier of DMD, and there is evidence suggesting that it modifies response to glucocorticoid treatment. The effect of the glucocorticoid deflazacort on SPP1 mRNA and protein expression was investigated in DMD primary human myoblasts and differentiated myotubes with defined rs28357094 genotype (TT versus TG)...
June 8, 2017: Human Molecular Genetics
https://www.readbyqxmd.com/read/28586319/rev-erb-and-ror-therapeutic-targets-for-treating-myopathies
#18
REVIEW
Ryan D Welch, Colin A Flaveny
Muscle is primarily known for its mechanical roles in locomotion, maintenance of posture, and regulation of cardiac and respiratory function. There are numerous medical conditions that adversely affect muscle, myopathies that disrupt muscle development, regeneration and protein turnover to detrimental effect. Skeletal muscle is also a vital secretory organ that regulates thermogenesis, inflammatory signaling and directs context specific global metabolic changes in energy substrate preference on a daily basis...
June 6, 2017: Physical Biology
https://www.readbyqxmd.com/read/28581498/dystrophin-glycoprotein-complex-sequesters-yap-to-inhibit-cardiomyocyte-proliferation
#19
Yuka Morikawa, Todd Heallen, John Leach, Yang Xiao, James F Martin
The regenerative capacity of the adult mammalian heart is limited, because of the reduced ability of cardiomyocytes to progress through mitosis. Endogenous cardiomyocytes have regenerative capacity at birth but this capacity is lost postnatally, with subsequent organ growth occurring through cardiomyocyte hypertrophy. The Hippo pathway, a conserved kinase cascade, inhibits cardiomyocyte proliferation in the developing heart to control heart size and prevents regeneration in the adult heart. The dystrophin-glycoprotein complex (DGC), a multicomponent transmembrane complex linking the actin cytoskeleton to extracellular matrix, is essential for cardiomyocyte homeostasis...
July 13, 2017: Nature
https://www.readbyqxmd.com/read/28574407/muscular-response-to-the-first-three-months-of-deflazacort-treatment-in-boys-with-duchenne-muscular-dystrophy
#20
L Jensen, S J Petersson, N O Illum, H C Laugaard-Jacobsen, T Thelle, L H Jørgensen, H D Schrøder
OBJECTIVE: Duchenne muscular dystrophy (DMD) patients are often treated with glucocorticoids; yet their precise molecular action remains unknown. METHODS: We investigated muscle biopsies from nine boys with DMD (aged: 7,6±2,8 yrs.) collected before and after three months of deflazacort treatment and compared them to eight healthy boys (aged: 5,3±2,4 yrs.). mRNA transcripts involved in activation of satellite cells, myogenesis, regeneration, adipogenesis, muscle growth and tissue inflammation were assessed...
June 1, 2017: Journal of Musculoskeletal & Neuronal Interactions
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