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extensor digitorum longus

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https://www.readbyqxmd.com/read/29793158/botulinum-toxin-type-a-affects-mechanics-of-non-injected-antagonistic-rat-muscles
#1
Filiz Ateş, Can A Yucesoy
Botulinum toxin type A (BTX-A) effects on the mechanics of non-injected antagonistic muscles are unknown. The aim was to test the following hypotheses in a rat model: BTX-A injected into gastrocnemius medialis (GM) and lateralis (GL) (1) decreases forces of the antagonistic tibialis anterior (TA) and extensor digitorum longus (EDL), (2) reduces length range of force exertion and (3) increases passive forces of the TA, and (4) changes inter-antagonistic and inter-synergistic epimuscular myofascial force transmission (EMFT)...
May 17, 2018: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/29791760/neopterin-7-8-dihydroneopterin-is-elevated-in-duchenne-muscular-dystrophy-patients-and-protects-mdx-skeletal-muscle-function
#2
Angus Lindsay, Alexandra Schmiechen, Christopher M Chamberlain, James M Ervasti, Dawn A Lowe
Macrophage infiltration is a hallmark of dystrophin-deficient muscle. We tested the hypothesis that Duchenne muscular dystrophy (DMD) patients would have elevated levels of the macrophage synthesized pterins, neopterin and 7,8-dihydroneopterin compared to unaffected age-matched controls. Urinary neopterin/creatinine and 7,8-dihydroneopterin/creatinine were elevated in DMD patients and 7,8-dihydroneopterin/creatinine was associated with patient age and ambulation. 7,8-dihydroneopterin correction with specific gravity was also elevated in DMD patients...
May 23, 2018: Experimental Physiology
https://www.readbyqxmd.com/read/29787474/hypothermia-decreases-o2-cost-for-ex-vivo-contraction-in-mouse-skeletal-muscle
#3
Patrick J Ferrara, Anthony R P Verkerke, Jeffrey J Brault, Katsuhiko Funai
INTRODUCTION: Evidence suggests that the energy efficiency of key ATPases involved in skeletal muscle contractile activity are improved in a hypothermic condition. However, it is unclear how a decrease in temperature affects skeletal muscle O2 consumption (mVO2) induced by muscle contraction. METHODS: Isolated mouse extensor digitorum longus (EDL) muscles were incubated in a temperature-controlled (37°C or 25°C) bath that included an O2 probe. EDL muscles from one limb were subjected to the measurement of resting mVO2, and the contralateral EDL muscles were used for the measurement of mVO2 with electrically-stimulated contraction...
May 22, 2018: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/29774305/multi-slice-mri-reveals-heterogeneity-in-disease-distribution-along-the-length-of-muscle-in-duchenne-muscular-dystrophy
#4
Stephen M Chrzanowski, Celine Baligand, Rebecca J Willcocks, Jasjit Deol, Ilona Schmalfuss, Donovan J Lott, Michael J Daniels, Claudia Senesac, Glenn A Walter, Krista Vandenborne
Background: Duchenne muscular dystrophy (DMD) causes progressive pathologic changes to muscle secondary to a cascade of inflammation, lipid deposition, and fibrosis. Clinically, this manifests as progressive weakness, functional loss, and premature mortality. Though insult to whole muscle groups is well established, less is known about the relationship between intramuscular pathology and function. Objective: Differences of intramuscular heterogeneity across muscle length were assessed using an ordinal MRI grading scale in lower leg muscles of boys with DMD and correlated to patient's functional status...
September 2017: Acta Myologica: Myopathies and Cardiomyopathies: Official Journal of the Mediterranean Society of Myology
https://www.readbyqxmd.com/read/29761850/unexpected-regulation-pattern-of-the-ikk%C3%AE-nf-%C3%AE%C2%BAb-murf1-pathway-with-remarkable-muscle-plasticity-in-the-daurian-ground-squirrel-spermophilus-dauricus
#5
Yanhong Wei, Lingchen Gong, Weiwei Fu, Shenhui Xu, Zhe Wang, Jie Zhang, Er Ning, Hui Chang, Huiping Wang, Yunfang Gao
As a typical hibernator, the Daurian ground squirrel (Spermophilus dauricus) spends considerable time in a state of reduced activity with prolonged fasting. Despite this, they experience little muscle atrophy and have thus become an interesting anti-disuse muscle atrophy model. The IKKβ/NF-κB signaling pathway is significant to muscle atrophy due to the protein degradation resulting from the upregulation of the E3 ubiquitin ligase MuRF1. The current study showed that the IKKβ/NF-κB signaling pathway and MuRF1 maintained relatively steady mRNA and protein expression levels, with little muscle atrophy observed in the soleus (slow-twitch, SOL) or extensor digitorum longus (fast-twitch, EDL) during hibernation (HIB); however, mRNA expression significantly increased in the SOL and EDL muscle during interbout arousal (IBA), as did the MuRF1 mRNA level in the SOL and MuRF1 protein level in the EDL...
May 15, 2018: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/29750000/pathophysiological-analyses-of-skeletal-muscle-in-obese-type-2-diabetes-sdt-fatty-rats
#6
Yusuke Kemmochi, Takeshi Ohta, Yu Motohashi, Akihiro Kaneshige, Sohei Katsumi, Kochi Kakimoto, Yuzo Yasui, Akiko Anagawa-Nakamura, Kaoru Toyoda, Eriko Taniai-Riya, Akemi Takahashi, Toshiyuki Shoda, Takahisa Yamada
Sarcopenia is the age-related decrease of muscle mass and function. Diabetes and obesity are known to be risk factors that exacerbate sarcopenia, but the underlying mechanism of diabetes-related sarcopenia is still unknown. Obese type 2 diabetes SDT fatty rats show early onset of severe diabetes and there have been no reports on the characteristics of their skeletal muscle. Therefore, pathophysiological analyses were performed for the skeletal muscle in these rats. Diabetic male SDT fatty rats were sacrificed at 8, 16, 24, 32 and 40 weeks of age...
April 2018: Journal of Toxicologic Pathology
https://www.readbyqxmd.com/read/29737368/-minimally-invasive-correction-of-lesser-toe-deformities-and-treatment-of-metatarsalgia
#7
REVIEW
M Thomas, M Jordan
OBJECTIVE: Atraumatic and joint-sparing procedure for the correction of lesser toe deformities by using a linear or perpendicular osteotomy of the proximal and/or middle phalanx of the lesser toes with additional capsulotomies or tendon dissection for soft tissue realignment. Metatarsalgia is addressed via an extracapsular distal metaphyseal crescentic-like metatarsal osteotomy. INDICATIONS: Symptomatic lesser toe deformities, painful pseudoexostosis, metatarsalgia, symptomatic metatarsal malalignment, metatarsus adductus...
May 8, 2018: Operative Orthopädie und Traumatologie
https://www.readbyqxmd.com/read/29726293/predicting-tendon-tissue-grafting-source-from-the-extensors-of-long-fingers-a-systematic-review-of-cadaveric-studies
#8
Kaissar Yammine
BACKGROUND: The use of tendon tissue for transfer and grafting is a common practice in hand surgery. Many local tendons are usually used, mainly that of the palmaris longus muscle. However, this tendon could be absent in up to 46%. Extra slips of the extensor digitorum communis (EDC) and extra tendons such as the extensor indicis (EI) and the extensor digiti minimi (EDM) could be valuable sources for tendon tissue. METHODS: A systematic review was conducted to quantify the proportion of extra slips in relation to each tendon and extra tendons in relation to each long finger...
May 1, 2018: Hand: Official Journal of the American Association for Hand Surgery
https://www.readbyqxmd.com/read/29710855/myoprotective-potential-of-creatine-is-greater-than-whey-protein-after-chemically-induced-damage-in-rat-skeletal-muscle
#9
Matthew B Cooke, Emma Rybalka, Christos G Stathis, Alan Hayes
The myoprotective effects of creatine monohydrate (CR) and whey protein (WP) are equivocal, with the use of proxy measures of muscle damage making interpretation of their effectiveness limited. The purpose of the study was to determine the effects of CR and WP supplementation on muscle damage and recovery following controlled, chemically-induced muscle damage. Degeneration of the extensor digitorum longus (EDL) muscle was induced by bupivacaine in rats supplemented with either CR, WP, or standard rat chow (CON)...
April 30, 2018: Nutrients
https://www.readbyqxmd.com/read/29668323/deficiency-of-selenoprotein-s-an-endoplasmic-reticulum-resident-oxidoreductase-impairs-the-contractile-function-of-fast-twitch-hindlimb-muscles
#10
Alex Bernard Addinsall, Craig Robert Wright, Christopher S Shaw, Natasha L McRae, Leonard George Forgan, Chia-Heng Weng, Xavier A Conlan, Paul S Francis, Zoe M Smith, Sofianos Andrikopoulos, Nicole Stupka
Selenoprotein S (Seps1) is an endoplasmic reticulum (ER) resident antioxidant implicated in ER stress and inflammation. In human vastus lateralis and mouse hindlimb muscles, Seps1 localization and expression was fiber type specific. In male Seps1+/- heterozygous mice, spontaneous physical activity was reduced compared to wild type littermates ( d=1.10, P=0.029). A similar trend also observed in Seps1-/- knockout mice ( d=1.12, P=0.051). Whole body metabolism, body composition, extensor digitorum longus (EDL) and soleus mass, and myofibre diameter were unaffected by genotype...
April 18, 2018: American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
https://www.readbyqxmd.com/read/29666144/sporadic-amyotrophic-lateral-sclerosis-sals-skeletal-muscle-response-to-cerebrospinal-fluid-from-sals-patients-in-a-rat-model
#11
Shruthi Shanmukha, Gayathri Narayanappa, Atchayaram Nalini, Phalguni Anand Alladi, Trichur R Raju
Skeletal muscle atrophy is the most prominent feature of amyotrophic lateral sclerosis (ALS), an adult-onset neurodegenerative disease of motor neurons. However, the contribution of skeletal muscle to disease progression remains elusive. Our previous studies have shown that intrathecal injection of cerebrospinal fluid from sporadic ALS patients (ALS-CSF) induces several degenerative changes in motor neurons and glia of neonatal rats. Here, we describe various pathologic events in the rat extensor digitorum longus muscle following intrathecal injection of ALS-CSF...
April 16, 2018: Disease Models & Mechanisms
https://www.readbyqxmd.com/read/29665848/characterization-and-utilization-of-the-flexor-digitorum-brevis-for-assessing-skeletal-muscle-function
#12
Michael D Tarpey, Adam J Amorese, Nicholas P Balestrieri, Terence E Ryan, Cameron A Schmidt, Joseph M McClung, Espen E Spangenburg
BACKGROUND: The ability to assess skeletal muscle function and delineate regulatory mechanisms is essential to uncovering therapeutic approaches that preserve functional independence in a disease state. Skeletal muscle provides distinct experimental challenges due to inherent differences across muscle groups, including fiber type and size that may limit experimental approaches. The flexor digitorum brevis (FDB) possesses numerous properties that offer the investigator a high degree of experimental flexibility to address specific hypotheses...
April 17, 2018: Skeletal Muscle
https://www.readbyqxmd.com/read/29657475/incidence-of-tendon-rupture-following-volar-plate-fixation-of-distal-radius-fractures-a-survey-of-2787-cases
#13
Kotaro Sato, Kenya Murakami, Yoshikuni Mimata, Minoru Doita
This study assessed the comprehensive incidence of tendon rupture following volar locking plate (VLP) surgery for a large number of patients with distal radius fractures (DRFs) at multiple facilities in one prefecture, Japan. During the 4-year period, 2787 patients with DRFs underwent fixation using VLP. The overall incidence rates of rupture of the FPL, the extensor pollicis longus, the flexor digitorum profundus of the index finger, and the extensor digitorum communis were 0.35% (10 patients), 0.29% (8 patients), 0...
March 2018: Journal of Orthopaedics
https://www.readbyqxmd.com/read/29627383/lpaat%C3%AE-agpat4-deficiency-impairs-maximal-force-contractility-in-soleus-and-alters-fibre-type-in-extensor-digitorum-longus-muscle
#14
Ryan M Bradley, Darin Bloemberg, Juan J Aristizabal Henao, Ashkan Hashemi, Andrew S Mitchell, Val A Fajardo, Catherine Bellissimo, Emily B Mardian, Eric Bombardier, Marie-France Paré, Katherine A Moes, Ken D Stark, A Russell Tupling, Joe Quadrilatero, Robin E Duncan
Lysophosphatidic acid acyltransferase (LPAAT) δ/acylglycerophosphate acyltransferase 4 is a mitochondrial enzyme and one of five homologues that catalyze the acyl-CoA-dependent synthesis of phosphatidic acid (PA) from lysophosphatidic acid. We studied skeletal muscle LPAATδ and found highest levels in soleus, a red oxidative fibre-type that is rich in mitochondria, and lower levels in extensor digitorum longus (EDL) (white glycolytic) and gastrocnemius (mixed fibre-type). Using Lpaatδ-deficient mice, we found no change in soleus or EDL mass, or in treadmill time-to-exhaustion compared to wildtype littermates...
July 2018: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/29624713/clinical-and-imaging-hallmarks-of-the-myh7-related-myopathy-with-severe-axial-involvement
#15
Ivana Dabaj, Robert Y Carlier, David Gómez-Andrés, Osório Abath Neto, Enrico Bertini, Adele D'Amico, Fabiana Fattori, Yann Péréon, Claudia Castiglioni, Eliana Rodillo, Michela Catteruccia, Júlio Brandão Guimarães, Acary Souza Bulle Oliveira, Umbertina Conti Reed, Lilia Mesrob, Doris Lechner, Anne Boland, Jean-François Deleuze, Edoardo Malfatti, Carsten Bonnemann, Jocelyn Laporte, Norma Romero, Adrien Felter, Susana Quijano-Roy, Cristiane Araújo Martins Moreno, Edmar Zanoteli
INTRODUCTION: MYH7 gene mutations are related to a heterogeneous group of skeletal and cardiac myopathies. METHODS: We evaluated clinical and muscle magnetic resonance imaging changes in patients with mutations in the rod domain of MYH7 including one with mosaicism and three with novel missense mutations. RESULTS: Patients presented in childhood with a distal and axial phenotype. Biopsy findings were variable. Half of the cases displaying some type of core pathology, including minicores and eccentric cores...
April 6, 2018: Muscle & Nerve
https://www.readbyqxmd.com/read/29616431/cuttlebone-as-a-marine-derived-material-for-preparing-bone-grafts
#16
Alisa Palaveniene, Volodymyr Harkavenko, Vitalina Kharchenko, Povilas Daugela, Mindaugas Pranskunas, Gintaras Juodzbalys, Nataliya Babenko, Jolanta Liesiene
The use of synthetic materials for biomedical applications still presents issues owing to the potential for unfavourable safety characteristics. Currently, there is increasing interest in using natural, marine-derived raw materials for bone tissue engineering. In our study, the endoskeleton of the mollusc Sepia, i.e. cuttlebone (CB), was used with regenerated cellulose (RC) to prepare three-dimensional composite bone grafts. CB microparticles were mechanically immobilised within a cellulose gel, resulting in a macroporous structure upon lyophilisation...
April 3, 2018: Marine Biotechnology
https://www.readbyqxmd.com/read/29604268/mild-aerobic-training-with-blood-flow-restriction-increases-the-hypertrophy-index-and-musk-in-both-slow-and-fast-muscles-of-old-rats-role-of-pgc-1%C3%AE
#17
Mohammad-Ali Bahreini Pour, Siyavash Joukar, Fariborz Hovanloo, Hamid Najafipour, Vida Naderi, Alireza Raji, Saeed Esmaeili-Mahani
AIMS: Existing evidence emphasize the role of mitochondrial dysfunction in sarcopenia which is revealed as loss of skeletal muscle mass and neuromuscular junction remodeling. We assessed the effect of low-intensity aerobic training along with blood flow restriction on muscle hypertrophy index, muscle-specific kinase (MuSK), a pivotal protein of the neuromuscular junction and Peroxisome proliferator-activated receptor gamma co-activator 1-alpha (PGC-1α) in aged male rats. MAIN METHODS: Animals groups were control (CTL), sham (Sh), leg blood flow restriction (BFR), exercise (Ex), sham + exercise (Sh + Ex), and BFR plus exercise (BFR + Ex) groups...
March 28, 2018: Life Sciences
https://www.readbyqxmd.com/read/29602289/effect-of-iloprost-on-contractile-impairment-and-mitochondrial-degeneration-in-ischemia-reperfusion-of-skeletal-muscle
#18
Z Bagis, M Ozeren, B Buyukakilli, E Balli, S Yaman, D Yetkin, D Ovla
Purpose Acute lower extremity ischemia is still a main cause of mortality and morbidity in orthopedic traumatology and reconstructive surgery. In acute lower extremity ischemia, the skeletal muscles are the tissues that are the most vulnerable to ischemia. The aim of this study was to evaluate the effects of iloprost (IL) therapy on skeletal muscle contractile impairment and mitochondrial degeneration in an acute lower extremity ischemia-reperfusion rat model. Main Methods Forty Wistar albino rats were randomly divided into a control group and four experimental groups...
March 1, 2018: Physiology International
https://www.readbyqxmd.com/read/29595327/the-antioxidant-system-in-the-soleus-muscle-of-growing-rats-is-stimulated-by-the-administration-of-a-low-protein-high-carbohydrate-diet
#19
Flavia Hosaki Silvino da Silva, Maisa Pavani Dos Santos, Mayara Peron Pereira, Samyra Lopes Buzelle, Edgar Wilibaldo Allebrandt Neto, Bibiana Mozzaquatro Gai, Francyele Dos Santos Correia, Cristina Helena Alves, Suelem Aparecida de França, Nair Honda Kawashita
The aim of this study was to evaluate the generation of reactive oxygen species (ROS) by xanthine oxidase (XO), the enzymatic antioxidant system and oxidative damage in soleus and extensor digitorum longus (EDL) muscles of growing rats fed a low-protein, high-carbohydrate (LPHC; 6% protein, 74% carbohydrate) diet for 15 days. The LPHC diet increased the total antioxidant capacity by 45% and the activities of glutathione peroxidase (GPx), glutathione reductase and catalase in the soleus muscles. There was an increase in the carbonylated proteins with no increase thiobarbituric acid reactive substances (TBARS), although the XO activity had increased 20%...
March 29, 2018: Archives of Physiology and Biochemistry
https://www.readbyqxmd.com/read/29558205/fibroblast-growth-factor-23-does-not-directly-influence-skeletal-muscle-cell-proliferation-and-differentiation-or-ex-vivo-muscle-contractility
#20
Keith G Avin, Julian A Vallejo, Neal X Chen, Kun Wang, Chad D Touchberry, Marco Brotto, Sarah L Dallas, Sharon M Moe, Michael J Wacker
Skeletal muscle dysfunction accompanies the clinical disorders of chronic kidney disease (CKD) and hereditary hypophosphatemic rickets. In both disorders fibroblast growth factor 23 (FGF23), a bone-derived hormone regulating phosphate and vitamin D metabolism, becomes chronically elevated. FGF23 has been shown to play a direct role in cardiac muscle dysfunction; however, it is unknown whether FGF23 signaling can also directly induce skeletal muscle dysfunction. We found expression of potential FGF23 receptors ( Fgfr1-4) and α-Klotho in muscles of two animal models (CD-1 and Cy/+ rat, a naturally occurring rat model of Chronic Kidney Disease-Mineral Bone Disorder) as well as C2 C12 myoblasts and myotubes...
March 20, 2018: American Journal of Physiology. Endocrinology and Metabolism
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