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Denervated muscle stimulation

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https://www.readbyqxmd.com/read/29742489/renal-denervation-effects-on-myocardial-fibrosis-and-ventricular-arrhythmias-in-rats-with-ischemic-cardiomyopathy
#1
Bin Zhang, Xiaorong Li, Chu Chen, Wanying Jiang, Dasheng Lu, Qian Liu, Kai Wang, Yuhao Yan, Zhixin Jiang, Jie Geng, Hai Xu, Qijun Shan
BACKGROUND/AIMS: To investigate the impact of renal denervation (RDN) on myocardial fibrosis and ventricular arrhythmias (VAs) in rats with ischemic cardiomyopathy. METHODS: An ischemic cardiomyopathy model was reproduced with myocardial infarction (MI) in adult Sprague-Dawley male rats. The RDN/Sham-RDN procedure was performed at 2 weeks after MI. Sham-MI and sham-RDN rats served as the control group. At 4 weeks after RDN, programmed electrical stimulation (PES) was used to induce VAs, including ventricular tachycardia and ventricular fibrillation, in all 3 groups (MI+RDN, MI, and control groups)...
May 5, 2018: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/29686823/two-years-of-functional-electrical-stimulation-by-large-surface-electrodes-for-denervated-muscles-improve-skin-epidermis-in-sci
#2
Giovanna Albertin, Helmut Kern, Christian Hofer, Diego Guidolin, Andrea Porzionato, Anna Rambaldo, Raffaele De Caro, Francesco Piccione, Andrea Marcante, Sandra Zampieri
Our previous studies have shown that severely atrophic Quadriceps muscles of spinal cord injury (SCI) patients suffering with complete conus and cauda equina lesions, and thus with permanent denervation-induced atrophy and degeneration of muscle fibers, were almost completely rescued to normal size after two years of home-based Functional Electrical Stimulation (h-bFES). Since we used large surface electrodes to stimulate the thigh muscles, we wanted to know if the skin was affected by long-term treatment. Here we report preliminary data of morphometry of skin biopsies harvested from legs of 3 SCI patients before and after two years of h-bFES to determine the total area of epidermis in transverse skin sections...
January 12, 2018: European Journal of Translational Myology
https://www.readbyqxmd.com/read/29557384/gsk3%C3%AE-inhibitor-promotes-myelination-and-mitigates-muscle-atrophy-after-peripheral-nerve-injury
#3
Jian Weng, Yan-Hua Wang, Ming Li, Dian-Ying Zhang, Bao-Guo Jiang
Delay of axon regeneration after peripheral nerve injury usually leads to progressive muscle atrophy and poor functional recovery. The Wnt/β-catenin signaling pathway is considered to be one of the main molecular mechanisms that lead to skeletal muscle atrophy in the elderly. We hold the hypothesis that the innervation of target muscle can be promoted by accelerating axon regeneration and decelerating muscle cell degeneration so as to improve functional recovery of skeletal muscle following peripheral nerve injury...
February 2018: Neural Regeneration Research
https://www.readbyqxmd.com/read/29550246/24s-hydroxycholesterol-suppresses-neuromuscular-transmission-in-sod1-g93a-mice-a-possible-role-of-no-and-lipid-rafts
#4
Kamilla A Mukhutdinova, Marat R Kasimov, Arthur R Giniatullin, Guzel F Zakyrjanova, Alexey M Petrov
Amyotrophic lateral sclerosis (ALS) is a neurodegenerative disorder characterized by the initial denervation of skeletal muscle and subsequent death of motor neurons. A dying-back pattern of ALS suggests a crucial role for neuromuscular junction dysfunction. In the present study, microelectrode recording of postsynaptic currents and optical detection of synaptic vesicle traffic (FM1-43 dye) and intracellular NO levels (DAF-FM DA) were used to examine the effect of the major brain-derived cholesterol metabolite 24S-hydroxycholesterol (24S-HC, 0...
March 14, 2018: Molecular and Cellular Neurosciences
https://www.readbyqxmd.com/read/29511489/the-effect-of-bone-marrow-mesenchymal-stem-cells-on-recovery-of-skeletal-muscle-after-neurotization-surgery-in-rat
#5
Gholam Hossein Farjah, Farzaneh Fazli, Mojtaba Karimipour, Bagher Pourheidar, Behnam Heshmatiyan, Maryam Pourheidar
Objectives: When the nerve is injured near its entrance to the muscle belly, we cannot perform conventional methods. One useful method in such a situation is neurotization surgery. In this study, Bone marrow mesenchymal stem cells (BMSCs) implanted into the paralyzed muscle after neurotization surgery. These cells can stimulate axon growth and motor endplate formation, also prevent muscle atrophy. Materials and Methods: Thirty-six adult male Sprague-Dawley rats were randomized into six groups: intact group, sham surgery group, control group, DMEM group, cell+DMEM group, denervated group...
March 2018: Iranian Journal of Basic Medical Sciences
https://www.readbyqxmd.com/read/29460776/preserving-neuromuscular-synapses-in-als-by-stimulating-musk-with-a-therapeutic-agonist-antibody
#6
Sarah Cantor, Wei Zhang, Nicolas Delestrée, Leonor Remédio, George Z Mentis, Steven J Burden
In amyotrophic lateral sclerosis (ALS) and animal models of ALS, including SOD1-G93A mice, disassembly of the neuromuscular synapse precedes motor neuron loss and is sufficient to cause a decline in motor function that culminates in lethal respiratory paralysis. We treated SOD1-G93A mice with an agonist antibody to MuSK, a receptor tyrosine kinase essential for maintaining neuromuscular synapses, to determine whether increasing muscle retrograde signaling would slow nerve terminal detachment from muscle. The agonist antibody, delivered after disease onset, slowed muscle denervation, promoting motor neuron survival, improving motor system output, and extending the lifespan of SOD1-G93A mice...
February 20, 2018: ELife
https://www.readbyqxmd.com/read/29447083/in-complete-sci-patients-long-term-functional-electrical-stimulation-of-permanent-denervated-muscles-increases-epidermis-thickness
#7
Giovanna Albertin, Christian Hofer, Sandra Zampieri, Michael Vogelauer, Stefan Löfler, Barbara Ravara, Diego Guidolin, Caterina Fede, Damiana Incendi, Andrea Porzionato, Raffaele De Caro, Alfonc Baba, Andrea Marcante, Francesco Piccione, Paolo Gargiulo, Amber Pond, Ugo Carraro, Helmut Kern
Our studies have shown that atrophic Quadriceps muscles from spinal cord injury patients suffering with permanent denervation-induced atrophy and degeneration of muscle fibers, were almost completely rescued to normal size after two years of home-based functional electrical stimulation (h-bFES). Because we used surface electrodes to stimulate the muscle, we wanted to know how the skin was affected by the treatments. Here, we report preliminary data from histological morphometry of Hematoxylin-Eosin-stained paraffin-embedded skin sections harvested from the legs of three SCI patients before and after two years of h-bFES...
April 2018: Neurological Research
https://www.readbyqxmd.com/read/29445517/autonomic-components-of-complex-regional-pain-syndrome-crps-are-favourably-affected-by-electrical-twitch-obtaining-intramuscular-stimulation-etoims-effects-on-blood-pressure-and-heart-rate
#8
Jennifer Chu, Frans Bruyninckx, Duncan V Neuhauser
Introduction: Favourable pain relief results on evoking autonomous twitches at myofascial trigger points with Electrical Twitch Obtaining Intramuscular Stimulation (ETOIMS). Aim: To document autonomic nervous system (ANS) dysfunction in Complex Regional Pain Syndrome (CRPS) from blood pressure (BP) and pulse/heart rate changes with ETOIMS. Methods and materials: A patient with persistent pain regularly received serial ETOIMS sessions of 60, 90, 120 or ≥150 min over 24 months...
July 2017: BMJ Innovations
https://www.readbyqxmd.com/read/29357417/array-profiling-reveals-contribution-of-cthrc1-to-growth-of-the-denervated-rat-urinary-bladder
#9
Baoyi Zhu, Mari Ekman, Daniel Svensson, Jessica Lindvall, Bengt-Olof Nilsson, Bengt Uvelius, Karl Swärd
Bladder denervation and bladder outlet obstruction are urological conditions that cause bladder growth. Transcriptomic surveys in outlet obstruction have identified differentially expressed genes, but similar studies following denervation have not been done. This was addressed using a rat model in which the pelvic ganglia were cryo-ablated followed by bladder microarray analyses. At 10 days following denervation, bladder weight had increased 5.6-fold and 2890 mRNAs and 135 miRNAs were differentially expressed...
January 10, 2018: American Journal of Physiology. Renal Physiology
https://www.readbyqxmd.com/read/29299228/comparison-of-strategies-and-performance-of-functional-electrical-stimulation-cycling-in-spinal-cord-injury-pilots-for-competition-in-the-first-ever-cybathlon
#10
Christine Azevedo Coste, Vance Bergeron, Rik Berkelmans, Emerson Fachin Martins, Ché Fornusek, Arnin Jetsada, Kenneth J Hunt, Raymond Tong, Ronald Triolo, Peter Wolf
Functional Electrical Stimulation (FES) can elicit muscular contraction and restore motor function in paralyzed limbs. FES is a rehabilitation technique applied to various sensorimotor deficiencies and in different functional situations, e.g. grasping, walking, standing, transfer, cycling and rowing. FES can be combined with mechanical devices. FES-assisted cycling is mainly used in clinical environments for training sessions on cycle ergometers, but it has also been adapted for mobile devices, usually tricycles...
December 5, 2017: European Journal of Translational Myology
https://www.readbyqxmd.com/read/29219188/toxicity-trial-of-canine-posterior-cricoarytenoid-intramuscular-vincristine-injections
#11
Randal C Paniello, Neel K Bhatt, Rebecca Chernock
OBJECTIVES/HYPOTHESIS: In animal studies, intramuscular vincristine injections have been shown to block reinnervation of the denervated target muscle. This application could be used selectively to influence recovery patterns following injury of recurrent laryngeal nerves (RLNs). However, vincristine is currently Food and Drug Administration approved only for intravenous use. A formal toxicity trial of intramuscular injections was performed. STUDY DESIGN: Animal study...
December 8, 2017: Laryngoscope
https://www.readbyqxmd.com/read/29128986/longitudinal-neurophysiological-assessment-of-intramuscular-type-a-botulin-toxin-in-healthy-humans
#12
L Lispi, L Leonardi, A Petrucci
The aim of this study is to assess the neurophysiological abnormalities of type A botulin toxin-infiltrated human muscle, and their evolution over time. Seried cMAP measurements, 3 and 20 Hz repetitive nerve stimulation, EMG, SFEMG over 3 months from toxin injection. Our findings consist in lack of decrement with 3 Hz repetitive nerve stimulation and facilitation with 20 Hz repetitive nerve stimulation; progressive increasing of jitter; early appearance of fibrillations; small and short motor unit action potential in the first 3 weeks, followed by increasing of MUAP amplitude and duration, with polyphasic morphology...
February 2018: Neurological Sciences
https://www.readbyqxmd.com/read/29104116/putative-roles-of-soluble-trophic-factors-in-facial-nerve-regeneration-target-reinnervation-and-recovery-of-vibrissal-whisking
#13
REVIEW
Habib Bendella, Svenja Rink, Maria Grosheva, Levent Sarikcioglu, Tessa Gordon, Doychin N Angelov
It is well-known that, after nerve transection and surgical repair, misdirected regrowth of regenerating motor axons may occur in three ways. The first way is that the axons enter into endoneurial tubes that they did not previously occupy, regenerate through incorrect fascicles and reinnervate muscles that they did not formerly supply. Consequently the activation of these muscles results in inappropriate movements. The second way is that, in contrast with the precise target-directed pathfinding by elongating motor nerves during embryonic development, several axons rather than a single axon grow out from each transected nerve fiber...
February 2018: Experimental Neurology
https://www.readbyqxmd.com/read/29061686/myogenic-activity-and-serotonergic-inhibition-in-the-chromatophore-network-of-the-squids-dosidicus-gigas-family-ommastrephidae-and-doryteuthis-opalescens-family-loliginidae
#14
Hannah E Rosen, William F Gilly
Seemingly chaotic waves of spontaneous chromatophore activity occur in the ommastrephid squid, Dosidicus gigas, in the living state and immediately after surgical disruption of all known inputs from the central nervous system. Similar activity is apparent in the loliginid, Doryteuthis opalescens, but only after chronic denervation of chromatophores for 5-7 days. Electrically-stimulated, neurally-driven activity in intact individuals of both species is blocked by tetrodotoxin (TTX), but TTX has no effect on spontaneous wave-activity in either Dosidicus or denervated D...
October 23, 2017: Journal of Experimental Biology
https://www.readbyqxmd.com/read/29038360/carotid-sinus-hypersensitivity-block-of-the-sternocleidomastoid-muscle-does-not-affect-responses-to-carotid-sinus-massage-in-healthy-young-adults
#15
Matthew G Lloyd, James M Wakeling, Michael S Koehle, Robert J Drapala, Victoria E Claydon
The arterial baroreflex is crucial for short-term blood pressure control - abnormal baroreflex function predisposes to syncope and falling. Hypersensitive responses to carotid baroreflex stimulation using carotid sinus massage (CSM) are common in older adults and may be associated with syncope. The pathophysiology of this hypersensitivity is unknown, but chronic denervation of the sternocleidomastoid muscles is common in elderly patients with carotid sinus hypersensitivity (CSH), and is proposed to interfere with normal integration of afferent firing from the carotid baroreceptors with proprioceptive feedback from the sternocleidomastoids, producing large responses to CSM...
October 2017: Physiological Reports
https://www.readbyqxmd.com/read/28884835/non-invasive-electromyographic-estimation-of-motor-unit-number-in-the-external-anal-sphincter-of-the-rat
#16
Chuan Zhang, Alvaro Munoz, H Henry Lai, Timothy Boone, Yingchun Zhang
AIMS: The external anal sphincter (EAS) is essential for maintaining fecal continence. Neurological disorders or traumatic injuries to muscle and nervous systems could lead to EAS denervation. Currently, there are no techniques available to document global innervation changes in the EAS in vivo. The aim of this study was to develop a novel approach to non-invasively estimate the number of functioning motor units (MUs) in the EAS and validate with immunofluorescent techniques in rats. METHODS: Intra-rectal surface electromyography (EMG) signals of the EAS, induced by a series of intra-vaginally delivered pudendal nerve stimulations with different intensities, were recorded...
January 2018: Neurourology and Urodynamics
https://www.readbyqxmd.com/read/28724748/depressed-synaptic-transmission-and-reduced-vesicle-release-sites-in-huntington-s-disease-neuromuscular-junctions
#17
Ahmad Khedraki, Eric J Reed, Shannon H Romer, Qingbo Wang, William Romine, Mark M Rich, Robert J Talmadge, Andrew A Voss
Huntington's disease (HD) is a progressive and fatal degenerative disorder that results in debilitating cognitive and motor dysfunction. Most HD studies have focused on degeneration of the CNS. We previously discovered that skeletal muscle from transgenic R6/2 HD mice is hyperexcitable due to decreased chloride and potassium conductances. The progressive and early onset of these defects suggest a primary myopathy in HD. In this study, we examined the relationship between neuromuscular transmission and skeletal muscle hyperexcitability...
August 23, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28706969/quantitative-analysis-of-immune-cell-subset-infiltration-of-supraspinatus-muscle-after-severe-rotator-cuff-injury
#18
J R Krieger, L E Tellier, M T Ollukaren, J S Temenoff, E A Botchwey
Rotator cuff tears cause muscle degeneration that is characterized by myofiber atrophy, fatty infiltration, and fibrosis and is minimally responsive to current treatment options. The underlying pathogenesis of rotator cuff muscle degeneration remains to be elucidated, and increasing evidence implicates immune cell infiltration as a significant factor. Because immune cells are comprised of highly heterogeneous subpopulations that exert divergent effects on injured tissue, understanding trafficking and accumulation of immune subpopulations may hold the key to more effective therapies...
June 2017: Regenerative Engineering and Translational Medicine
https://www.readbyqxmd.com/read/28546288/dynamic-changes-in-the-mouse-skeletal-muscle-proteome-during-denervation-induced-atrophy
#19
Franziska Lang, Sriram Aravamudhan, Hendrik Nolte, Clara Türk, 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 loss of muscle mass. To elucidate the pathophysiological adaptations that occur in atrophying muscles, we used stable isotope labelling and mass spectrometry to quantify protein expression changes accurately during denervation-induced atrophy after sciatic nerve section in the mouse gastrocnemius muscle. Additionally, mice were fed a stable isotope labelling of amino acids in cell culture (SILAC) diet containing (13)C6-lysine for 4, 7 or 11 days to calculate relative levels of protein synthesis in denervated and control muscles...
July 1, 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
#20
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
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