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Denervated muscle stimulation

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https://www.readbyqxmd.com/read/28546288/dynamic-changes-in-the-skeletal-muscle-proteome-during-denervation-induced-atrophy
#1
Franziska Lang, Sriram Aravamudhan, Hendrik Nolte, Clara Tuerk, Soraya Hölper, Stefan Müller, Stefan Günther, Bert Blaauw, Thomas Braun, Marcus Krüger
Loss of neuronal stimulation enhances protein breakdown and reduces protein synthesis, causing rapid muscle mass loss. To elucidate the pathophysiological adaptations that occur in atrophying muscles, we used stable isotope labelling and mass spectrometry to accurately quantify protein expression changes during denervation-induced atrophy after sciatic nerve section in the mouse gastrocnemius muscle (GAST). Additionally, mice were fed a SILAC diet containing (13)C6 lysine for four, seven, or eleven days to calculate relative levels of protein synthesis in denervated and control muscles...
May 25, 2017: Disease Models & Mechanisms
https://www.readbyqxmd.com/read/28497057/electrical-stimulation-of-denervated-rat-skeletal-muscle-retards-capillary-and-muscle-loss-in-early-stages-of-disuse-atrophy
#2
Kouki Nakagawa, Hiroyuki Tamaki, Keishi Hayao, Kengo Yotani, Futoshi Ogita, Noriaki Yamamoto, Hideaki Onishi
The purpose of the present study is to investigate the effects of low-frequency electrical muscle stimulation (ES) on the decrease in muscle mass, fiber size, capillary supply, and matrix metalloproteinase (MMP) immunoreactivity in the early stages of denervation-induced limb disuse. Direct ES was performed on the tibialis anterior muscle following denervation in seven-week-old male rats. The rats were divided into the following groups: control (CON), denervation (DN), and denervation with direct ES (DN + ES)...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28444093/electrical-stimulation-attenuates-morphological-alterations-and-prevents-atrophy-of-the-denervated-cranial-tibial-muscle
#3
Cleuber Rodrigo de Souza Bueno, Mizael Pereira, Idvaldo Aparecido Favaretto, Carlos Henrique Fachin Bortoluci, Thais Caroline Pereira Dos Santos, Daniel Ventura Dias, Letícia Rossi Daré, Geraldo Marco Rosa
Objective: To investigate if electrical stimulation through Russian current is able to maintain morphology of the cranial tibial muscle of experimentally denervated rats. Methods: Thirty-six Wistar rats were divided into four groups: the Initial Control Group, Final Control Group, Experimental Denervated and Treated Group, Experimental Denervated Group. The electrostimulation was performed with a protocol of Russian current applied three times per week, for 45 days...
January 2017: Einstein
https://www.readbyqxmd.com/read/28403681/atrophy-ultra-structural-disorders-severe-atrophy-and-degeneration-of-denervated-human-muscle-in-sci-and-aging-implications-for-their-recovery-by-functional-electrical-stimulation-updated-2017
#4
Helmut Kern, Cristian Hofer, Stefan Loefler, Sandra Zampieri, Paolo Gargiulo, Alfonc Baba, Andrea Marcante, Francesco Piccione, Amber Pond, Ugo Carraro
OBJECTIVES: Long-term lower motor neuron denervation of skeletal muscle is known to result in degeneration of muscle with replacement by adipose and fibrotic tissues. However, long-term survival of a subset of skeletal myofibers also occurs. METHODS: We performed transverse and longitudinal studies of patients with spinal cord injury (SCI), patients specifically complete Conus and Cauda Equina Syndrome and also of active and sedentary seniors which included analyses of muscle biopsies from the quadriceps m...
April 13, 2017: Neurological Research
https://www.readbyqxmd.com/read/28395670/absence-of-physiological-ca-2-transients-is-an-initial-trigger-for-mitochondrial-dysfunction-in-skeletal-muscle-following-denervation
#5
Chehade Karam, Jianxun Yi, Yajuan Xiao, Kamal Dhakal, Lin Zhang, Xuejun Li, Carlo Manno, Jiejia Xu, Kaitao Li, Heping Cheng, Jianjie Ma, Jingsong Zhou
BACKGROUND: Motor neurons control muscle contraction by initiating action potentials in muscle. Denervation of muscle from motor neurons leads to muscle atrophy, which is linked to mitochondrial dysfunction. It is known that denervation promotes mitochondrial reactive oxygen species (ROS) production in muscle, whereas the initial cause of mitochondrial ROS production in denervated muscle remains elusive. Since denervation isolates muscle from motor neurons and deprives it from any electric stimulation, no action potentials are initiated, and therefore, no physiological Ca(2+) transients are generated inside denervated muscle fibers...
April 10, 2017: Skeletal Muscle
https://www.readbyqxmd.com/read/28316120/synergistic-effects-of-g-csf-and-bone-marrow-stromal-cells-on-nerve-regeneration-with-acellular-nerve-xenografts
#6
Hua Jia, Ying Wang, Tao Wang, Yi Dong, Wei-Li Li, Jun-Ping Li, Wen-Zhi Ma, Xiao-Jie Tong, Zhong-Yi He
Peripheral nerve defects result in severe denervation presenting sensory and motor functional incapacitation. Currently, a satisfactory therapeutic treatment promoting the repair of injured nerves is not available. As shown in our previous study, acellular nerve xenografts (ANX) implanted with bone marrow stromal cells (BMSCs) replaced allografts and promoted nerve regeneration. Additionally, granulocyte-colony stimulating factor (G-CSF) has been proven to mobilize supplemental cells and enhance vascularization in the niche...
July 2017: Synapse
https://www.readbyqxmd.com/read/28213864/electrical-stimulation-of-denervated-rat-skeletal-muscle-ameliorates-bone-fragility-and-muscle-loss-in-early-stage-disuse-musculoskeletal-atrophy
#7
Hiroyuki Tamaki, Kengo Yotani, Futoshi Ogita, Keishi Hayao, Kouki Nakagawa, Kazuhiro Sugawara, Hikari Kirimoto, Hideaki Onishi, Norikatsu Kasuga, Noriaki Yamamoto
We tested whether daily muscle electrical stimulation (ES) can ameliorate the decrease in cortical bone strength as well as muscle and bone geometric and material properties in the early stages of disuse musculoskeletal atrophy. 7-week-old male F344 rats were randomly divided into three groups: age-matched control group (Cont); a sciatic denervation group (DN); and a DN + direct electrical stimulation group (DN + ES). Denervated tibialis anterior (TA) muscle in the DN + ES group received ES with 16 mA at 10 Hz for 30 min/day, 6 days/week...
February 17, 2017: Calcified Tissue International
https://www.readbyqxmd.com/read/28120411/electrical-stimulation-delays-reinnervation-in-denervated-rat-muscle
#8
Clara M Pinheiro-Dardis, Bruna T Erbereli, Davilene Gigo-Benato, Paula A T S Castro, Thiago L Russo
INTRODUCTION: It is not clear if electrical stimulation (ES) can affect muscle reinnervation. This study aimed to verify if ES affects neuromuscular recovery after nerve crush injury in rats. METHODS: Denervated muscles were electrically stimulated daily for 6 or 14 days. Neuromuscular performance and excitability, and muscle morphology were determined. Muscle trophism markers (atrogin-1, MuRF-1, and myoD), as well as neuromuscular junction (NMJ) organization (MuSK, Dok-7, nAChR, and N-CAM) were assessed...
January 24, 2017: Muscle & Nerve
https://www.readbyqxmd.com/read/28096335/myofibril-breakdown-during-atrophy-is-a-delayed-response-requiring-the-transcription-factor-pax4-and-desmin-depolymerization
#9
Alexandra Volodin, Idit Kosti, Alfred Lewis Goldberg, Shenhav Cohen
A hallmark of muscle atrophy is the excessive degradation of myofibrillar proteins primarily by the ubiquitin proteasome system. In mice, during the rapid muscle atrophy induced by fasting, the desmin cytoskeleton and the attached Z-band-bound thin filaments are degraded after ubiquitination by the ubiquitin ligase tripartite motif-containing protein 32 (Trim32). To study the order of events leading to myofibril destruction, we investigated the slower atrophy induced by denervation (disuse). We show that myofibril breakdown is a two-phase process involving the initial disassembly of desmin filaments by Trim32, which leads to the later myofibril breakdown by enzymes, whose expression is increased by the paired box 4 (PAX4) transcription factor...
February 21, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28078066/use-it-or-lose-it-tonic-activity-of-slow-motoneurons-promotes-their-survival-and-preferentially-increases-slow-fiber-type-groupings-in-muscles-of-old-lifelong-recreational-sportsmen
#10
Simone Mosole, Ugo Carraro, Helmut Kern, Stefan Loefler, Sandra Zampieri
Histochemistry, immuno-histochemistry, gel electrophoresis of single muscle fibers and electromyography of aging muscles and nerves suggest that: i) denervation contributes to muscle atrophy, ii) impaired mobility accelerates the process, and iii) lifelong running protects against loss of motor units. Recent corroborating results on the muscle effects of Functional Electrical Stimulation (FES) of aged muscles will be also mentioned, but we will in particular discuss how and why a lifelong increased physical activity sustains reinnervation of muscle fibers...
September 15, 2016: European Journal of Translational Myology
https://www.readbyqxmd.com/read/28073285/muscle-nerve-muscle-grafting-for-facial-reanimation-in-rats
#11
Steven J Charous, Jeffery M Hotaling, Bridget D Burgess, Joshua M Sappington, James Park, Grant Turek, Eileen M Foecking
OBJECTIVE: Facial paralysis is a devastating condition leaving patients with a myriad of aesthetic and functional consequences. Muscle-nerve-muscle (MNM) neurotization is a reinnervation technique that involves implanting an autogenous nerve graft as a conduit between an innervated "donor" muscle and a denervated "recipient" muscle. We investigated the use of MNM reinnervation, alone or in combination with electrical stimulation (ES) and testosterone propionate (TP) in comparison to nerve reanastomosis (RE), on functional recovery following rat facial nerve injury...
April 2017: Annals of Otology, Rhinology, and Laryngology
https://www.readbyqxmd.com/read/28035339/emerging-roles-for-histone-deacetylases-in-age-related-muscle-atrophy
#12
REVIEW
Michael E Walsh, Holly Van Remmen
BACKGROUND: Skeletal muscle atrophy during aging, a process known as sarcopenia, is associated with muscle weakness, frailty, and the loss of independence in older adults. The mechanisms contributing to sarcopenia are not totally understood, but muscle fiber loss due to apoptosis, reduced stimulation of anabolic pathways, activation of catabolic pathways, denervation, and altered metabolism have been observed in muscle from old rodents and humans. OBJECTIVE: Recently, histone deacetylases (HDACs) have been implicated in muscle atrophy and dysfunction due to denervation, muscular dystrophy, and disuse, and HDACs play key roles in regulating metabolism in skeletal muscle...
October 27, 2016: Nutrition and Healthy Aging
https://www.readbyqxmd.com/read/27836905/electrophysiological-study-of-femoral-nerve-function-after-a-continuous-femoral-nerve-block-for-anterior-cruciate-ligament-reconstruction-a-randomized-controlled-single-blind-trial
#13
Kevin Stebler, Robin Martin, Kyle Robert Kirkham, Thierry Küntzer, Istvan Bathory, Eric Albrecht
BACKGROUND: A continuous femoral nerve block (CFNB) is an effective analgesic treatment after anterior cruciate ligament (ACL) reconstruction but may result in transient femoral nerve injuries and quadriceps muscle weakness, which in turn contribute to worsened functional outcomes. PURPOSE: To compare electrophysiological criteria of a femoral nerve injury as well as functional and pain-related outcomes after ACL reconstruction when analgesia was provided by a CFNB or intravenous patient-controlled analgesic of morphine (IV PCA)...
March 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/27796305/monitoring-peripheral-nerve-degeneration-in-als-by-label-free-stimulated-raman-scattering-imaging
#14
Feng Tian, Wenlong Yang, Daniel A Mordes, Jin-Yuan Wang, Johnny S Salameh, Joanie Mok, Jeannie Chew, Aarti Sharma, Ester Leno-Duran, Satomi Suzuki-Uematsu, Naoki Suzuki, Steve S Han, Fa-Ke Lu, Minbiao Ji, Rosanna Zhang, Yue Liu, Jack Strominger, Neil A Shneider, Leonard Petrucelli, X Sunney Xie, Kevin Eggan
The study of amyotrophic lateral sclerosis (ALS) and potential interventions would be facilitated if motor axon degeneration could be more readily visualized. Here we demonstrate that stimulated Raman scattering (SRS) microscopy could be used to sensitively monitor peripheral nerve degeneration in ALS mouse models and ALS autopsy materials. Three-dimensional imaging of pre-symptomatic SOD1 mouse models and data processing by a correlation-based algorithm revealed that significant degeneration of peripheral nerves could be detected coincidentally with the earliest detectable signs of muscle denervation and preceded physiologically measurable motor function decline...
October 31, 2016: Nature Communications
https://www.readbyqxmd.com/read/27593485/nerve-and-free-gracilis-muscle-transfers-for%C3%A2-thumb-and-finger-extension-reconstruction-in-long-standing-tetraplegia
#15
Jayme Augusto Bertelli, Marcos Flávio Ghizoni
PURPOSE: With spinal cord injuries, muscles below the level of the lesion remain innervated despite the absence of volitional control. This persistent innervation protects against denervation atrophy and may allow for nerve transfers to treat long-standing lesions within the spinal cord. We tested the hypothesis that in chronic spinal cord lesions, muscles remained viable for reinnervation. METHODS: To test this hypothesis, we operated on 7 patients with tetraplegia to reconstruct thumb and finger extension after a mean interval of 5 years since injury...
November 2016: Journal of Hand Surgery
https://www.readbyqxmd.com/read/27592133/recovery-from-muscle-weakness-by-exercise-and-fes-lessons-from-masters-active-or-sedentary-seniors-and-sci-patients
#16
REVIEW
Ugo Carraro, Helmut Kern, Paolo Gava, Christian Hofer, Stefan Loefler, Paolo Gargiulo, Kyle Edmunds, Íris Dröfn Árnadóttir, Sandra Zampieri, Barbara Ravara, Francesco Gava, Alessandra Nori, Valerio Gobbo, Stefano Masiero, Andrea Marcante, Alfonc Baba, Francesco Piccione, Sheila Schils, Amber Pond, Simone Mosole
Many factors contribute to the decline of skeletal muscle that occurs as we age. This is a reality that we may combat, but not prevent because it is written into our genome. The series of records from World Master Athletes reveals that skeletal muscle power begins to decline at the age of 30 years and continues, almost linearly, to zero at the age of 110 years. Here we discuss evidence that denervation contributes to the atrophy and slowness of aged muscle. We compared muscle from lifelong active seniors to that of sedentary elderly people and found that the sportsmen have more muscle bulk and slow fiber type groupings, providing evidence that physical activity maintains slow motoneurons which reinnervate muscle fibers...
September 3, 2016: Aging Clinical and Experimental Research
https://www.readbyqxmd.com/read/27584138/electrical-stimulation-based-on-chronaxie-increases-fibrosis-and-modulates-tweak-fn14-tgf-%C3%AE-myostatin-and-mmp-pathways-in-denervated-muscles
#17
Clara Maria Pinheiro-Dardis, Thiago Luiz Russo
OBJECTIVE: The aim of this work was to investigate the effects of electrical stimulation (ES) of denervated muscles of rat in neuromuscular performance, muscle atrophy, and fibrosis formation. DESIGN: Wistar rats were divided into normal (N), 7- or 15-day denervation (D7d and D15d), D7d or D15d plus ES (DES7d and DES15d, respectively). Sciatic nerves were crushed causing muscle denervation. Two hundred muscle contractions were electrically induced daily by surface electrodes, considering muscle chronaxie...
April 2017: American Journal of Physical Medicine & Rehabilitation
https://www.readbyqxmd.com/read/27513942/denervation-induced-activation-of-the-ubiquitin-proteasome-system-reduces-skeletal-muscle-quantity-not-quality
#18
Cory W Baumann, Haiming M Liu, LaDora V Thompson
It is well known that the ubiquitin-proteasome system is activated in response to skeletal muscle wasting and functions to degrade contractile proteins. The loss of these proteins inevitably reduces skeletal muscle size (i.e., quantity). However, it is currently unknown whether activation of this pathway also affects function by impairing the muscle's intrinsic ability to produce force (i.e., quality). Therefore, the purpose of this study was twofold, (1) document how the ubiquitin-proteasome system responds to denervation and (2) identify the physiological consequences of these changes...
2016: PloS One
https://www.readbyqxmd.com/read/27464347/evidence-for-dying-back-axonal-degeneration-in-age-associated-skeletal-muscle-decline
#19
Tae Chung, Jae Sung Park, Sangri Kim, Nataly Montes, Jeremy Walston, Ahmet Höke
INTRODUCTION: Age-associated muscle strength decline is a major contributing factor to increased late-life functional decline and comorbidity, and is strongly associated with early mortality. Although all parts of the neuromuscular system seem to be affected by aging, dying-back of motor axons likely plays a major role. METHODS: We compared the degeneration in ventral roots and neuromuscular junction denervation in young and aged mice and correlated the findings with strength and electrophysiological measures...
June 2017: Muscle & Nerve
https://www.readbyqxmd.com/read/27229174/enhanced-flexible-tubular-microelectrode-with-conducting-polymer-for-multi-functional-implantable-tissue-machine-interface
#20
Hong-Chang Tian, Jing-Quan Liu, Xiao-Yang Kang, Long-Jun Tang, Ming-Hao Wang, Bo-Wen Ji, Bin Yang, Xiao-Lin Wang, Xiang Chen, Chun-Sheng Yang
Implantable biomedical microdevices enable the restoration of body function and improvement of health condition. As the interface between artificial machines and natural tissue, various kinds of microelectrodes with high density and tiny size were developed to undertake precise and complex medical tasks through electrical stimulation and electrophysiological recording. However, if only the electrical interaction existed between electrodes and muscle or nerve tissue without nutrition factor delivery, it would eventually lead to a significant symptom of denervation-induced skeletal muscle atrophy...
2016: Scientific Reports
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