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https://www.readbyqxmd.com/read/28813489/oxidative-and-glycolytic-skeletal-muscles-show-marked-differences-in-gene-expression-profile-in-chinese-qingyuan-partridge-chickens
#1
Shu Jingting, Xiao Qin, Shan Yanju, Zhang Ming, Tu Yunjie, Ji Gaige, Sheng Zhongwei, Zou Jianmin
Oxidative and glycolytic myofibers have different structures and metabolic characteristics and their ratios are important in determining poultry meat quality. However, the molecular mechanisms underlying their differences are unclear. In this study, global gene expression profiling was conducted in oxidative skeletal muscle (obtained from the soleus, or SOL) and glycolytic skeletal muscle (obtained from the extensor digitorum longus, or EDL) of Chinese Qingyuan partridge chickens, using the Agilent Chicken Gene Expression Chip...
2017: PloS One
https://www.readbyqxmd.com/read/28807824/flavan-3-ol-delays-the-progression-of-disuse-atrophy-induced-by-hindlimb-suspension-in-mice
#2
Mao Ito, Naoto Kudo, Yuji Miyake, Tatsuya Imai, Tomoki Unno, Yoko Yamashita, Yoshihisa Hirota, Hitoshi Ashida, Naomi Osakabe
Periods of skeletal muscle disuse, for example due to a sedentary lifestyle or bed rest, are associated with aging and can lead to muscle atrophy. We previously found that the flavan 3-ol fraction derived from cocoa (FL) enhanced energy expenditure with metabolic changes in skeletal muscle. In the present study, we examined the effect of FL on disuse muscle atrophy induced by hindlimb suspension in mice. Male C57BL/6J mice were assigned to four groups as follows: unsuspended-vehicle, unsuspended-FL, suspended-vehicle, and suspended-FL...
August 11, 2017: Experimental Gerontology
https://www.readbyqxmd.com/read/28790986/colonisation-of-meat-by-escherichia-coli-o157-h7-investigating-bacterial-tropism-with-respect-to-the-different-types-of-skeletal-muscles-subtypes-of-myofibres-and-postmortem-time
#3
Caroline Chagnot, Annie Venien, Sandra Renier, Nelly Caccia, Régine Talon, Thierry Astruc, Mickaël Desvaux
Escherichia coli O157:H7 is an enterohaemorrhagic E. coli (EHEC) responsible for serious diseases, especially pediatric, and of great concern for the meat industry. Meat contamination by EHEC occurs at slaughtering, especially at dehiding stage, where bacteria can be transferred from hides to carcasses. The skeletal muscle tissues comprise four major types of myofibres, which differ in their contraction velocity and metabolism. Myofibres are surrounded by the extracellular matrix (ECM). Adhesion of E. coli O157:H7 to meat was investigated considering well-defined types of skeletal muscle and their constituent myofibres as well as postmortem changes in muscle, using fluorescence microscopy and immunohistochemical analyses...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28761699/high-intensity-flywheel-exercise-and-recovery-of-atrophy-after-90-days-bed-rest
#4
Daniel L Belavý, Hiroshi Ohshima, Jörn Rittweger, Dieter Felsenberg
AIMS: To investigate differential muscle atrophy during bed-rest, the impact of a high-intensity concentric-eccentric (flywheel) resistance exercise countermeasure and muscle recovery after bed-rest. METHODS: Twenty-five healthy male subjects underwent 90 dayshead-down tilt bed-rest. Volume of individual lower-limb muscles was measured via MRI before, twice during and four times up to 1 year after bed-rest. Subjects were either inactive (n=16) or performed flywheel exercise every third day of bed-rest (n=9)...
2017: BMJ Open Sport & Exercise Medicine
https://www.readbyqxmd.com/read/28761419/interfacing-peripheral-nerve-with-macro-sieve-electrodes-following-spinal-cord-injury
#5
REVIEW
Nathan K Birenbaum, Matthew R MacEwan, Wilson Z Ray
Macro-sieve electrodes were implanted in the sciatic nerve of five adult male Lewis rats following spinal cord injury to assess the ability of the macro-sieve electrode to interface regenerated peripheral nerve fibers post-spinal cord injury. Each spinal cord injury was performed via right lateral hemisection of the cord at the T9-10 site. Five months post-implantation, the ability of the macro-sieve electrode to interface the regenerated nerve was assessed by stimulating through the macro-sieve electrode and recording both electromyography signals and evoked muscle force from distal musculature...
June 2017: Neural Regeneration Research
https://www.readbyqxmd.com/read/28730826/effect-of-carcinogen-1-2-dimethylhydrazine-treatment-on-fibre-types-in-skeletal-muscles-of-male-wistar-rats
#6
V Smerdu, M Perše
The cancerogen 1,2-dimethylhydrazine (DMH), widely used in the experimental animal model of carcinogenesis, affects various organs, but its effect on muscle fibres is unknown. To evaluate the effect of 15-week DMH treatment on the fibre size and myosin heavy chain (MyHC) isoforms, which substantially determine fibre types and their contractile characteristics, pure and hybrid fibre types were immunohistochemically determined according to the MyHC isoform expression in soleus, extensor digitorum longus, gastrocnemius medialis and lateralis muscles of DMH-treated and control male Wistar rats...
July 18, 2017: Physiological Research
https://www.readbyqxmd.com/read/28729214/milk-fat-globule-membrane-supplementation-with-voluntary-running-exercise-attenuates-age-related-motor-dysfunction-by-suppressing-neuromuscular-junction-abnormalities-in-mice
#7
Michiko Yano, Yoshihiko Minegishi, Satoshi Sugita, Noriyasu Ota
Age-related loss of skeletal muscle mass and function attenuates physical performance, and maintaining fine muscle innervation is known to play an important role in its prevention. We had previously shown that consumption of milk fat globule membrane (MFGM) with habitual exercise improves the muscle mass and motor function in humans and mice. Improvement of neuromuscular junction (NMJ) was suggested as one of the mechanisms underlying these effects. In this study, we evaluated the effect of MFGM intake combined with voluntary running (MFGM-VR) on morphological changes of NMJ and motor function in aging mice...
July 18, 2017: Experimental Gerontology
https://www.readbyqxmd.com/read/28719339/modulation-of-oxidative-and-glycolytic-skeletal-muscle-fibers-na-h-exchanger1-nhe1-and-na-hco3-co-transporter1-nbc1-genes-and-proteins-expression-in-type-2-diabetic-rat-streptozotocin-high-fat-diet-following-long-term-endurance-training
#8
A Monazzami, H Rajabi, R Ghrakhanlou, K Yari, Z Rahimi
Diabetes is known to alter both oxidative and glycolytic pathways in a fiber type-dependent manner. The aim of present study was to investigate the effects of endurance training on muscle NHE1 and NBC1 genes and proteins expression in type 2 diabetic rats. Male wistar rats (n=30), 4 weeks old and 95.7±10.8g, were randomly selected and divided into control, diabetic without training and diabetic with training groups. Diabetes was induced by injection of low dose of streptotozin and feeding with high-fat diet...
May 20, 2017: Cellular and Molecular Biology
https://www.readbyqxmd.com/read/28709787/technique-of-split-flexor-carpi-ulnaris-opponensplasty
#9
REVIEW
Mohammed M Al-Qattan
The classic donor motor units for opponensplasty are the flexor digitorum superficialis, the extensor indicis proprius, the palmaris longus, and the abductor digiti minimi. Occasionally, all classic donor motor units are not available for the opponensplasty; a review of the literature revealed that the flexor carpi ulnaris opponensplasty has not been previously described. The surgical technique of the split flexor carpi ulnaris opponensplasty is described in the current paper along with a clinical example...
July 11, 2017: Journal of Hand Surgery
https://www.readbyqxmd.com/read/28702319/grandpaternal-induced-transgenerational-dietary-reprogramming-of-the-unfolded-protein-response-in-skeletal-muscle
#10
Petter S Alm, Thais de Castro Barbosa, Romain Barrès, Anna Krook, Juleen R Zierath
OBJECTIVE: Parental nutrition and lifestyle impact the metabolic phenotype of the offspring. We have reported that grandpaternal chronic high-fat diet (HFD) transgenerationally impairs glucose metabolism in subsequent generations. Here we determined whether grandpaternal diet transgenerationally impacts the transcriptome and lipidome in skeletal muscle. Our aim was to identify tissue-specific pathways involved in transgenerational inheritance of environmental-induced phenotypes. METHODS: F0 male Sprague-Dawley rats were fed a HFD or chow for 12 weeks before breeding with chow-fed females to generate the F1 generation...
July 2017: Molecular Metabolism
https://www.readbyqxmd.com/read/28690197/high-fat-diet-induces-skeletal-muscle-oxidative-stress-in-a-fiber-type-dependent-manner-in-rats
#11
Ricardo A Pinho, Diane M Sepa-Kishi, George Bikopoulos, Michelle V Wu, Abinas Uthayakumar, Arta Mohasses, Meghan C Hughes, Christopher G R Perry, Rolando B Ceddia
This study investigated the effects of high-fat (HF) diet on parameters of oxidative stress among muscles with distinct fiber type composition and oxidative capacities. To accomplish that, male Wistar rats were fed either a low-fat standard chow (SC) or a HF diet for 8 weeks. Soleus, extensor digitorum longus (EDL), and epitrochlearis muscles were collected and mitochondrial H2O2 (mtH2O2) emission, palmitate oxidation, and gene expression and antioxidant system were measured. Chronic HF feeding enhanced fat oxidation in oxidative and glycolytic muscles...
July 6, 2017: Free Radical Biology & Medicine
https://www.readbyqxmd.com/read/28676916/-correction-of-flexible-lesser-toe-deformity-transfer-of-the-flexor-digitorum-longus-tendon
#12
D Arbab, D Frank, B Bouillon, C Lüring
OBJECTIVE: Realignment and pain relief of toes 2-5 by flexor-to-extensor tendon transfer of the flexor digitorum longus (FDL) muscle. INDICATIONS: As an isolated procedure in flexible proximal interphalangeal (PIP) joint flexion and/or flexible metatarsophalangeal (MTP) joint extension (hammer toe). In combination with a metatarsal osteotomy or PIP joint arthrodesis in case of flexible MTP joint extension. CONTRAINDICATIONS: General medical contraindications to surgical interventions...
July 4, 2017: Operative Orthopädie und Traumatologie
https://www.readbyqxmd.com/read/28676556/influence-of-longitudinal-radiation-exposure-from-microcomputed-tomography-scanning-on-skeletal-muscle-function-and-metabolic-activity-in-female-cd-1-mice
#13
John S Mikhaeil, Sandra M Sacco, Caitlin Saint, William Gittings, Jordan Bunda, Cameron R Giles, Val Andrew Fajardo, Rene Vandenboom, Wendy E Ward, Paul J LeBlanc
Microcomputed tomography (μCT) is an imaging technology to assess bone microarchitecture, a determinant of bone strength. When measured in vivo, μCT exposes the skeletal site of interest to a dose of radiation, in addition to nearby skeletal muscles as well. Therefore, the aim of this study was to determine the effects of repeated radiation exposure from in vivo μCT on muscle health - specifically, muscle morphometrics, contractile function, and enzyme activity. This study exposed the right hind limb of female mice to either a low (26 cGy) or moderate (46 cGy) dose, at 2, 4, and 6 months of age, while the left hind limb of the same animal was exposed to a single dose at 6 months to serve as a nonirradiated control...
July 2017: Physiological Reports
https://www.readbyqxmd.com/read/28676552/acylated-and-unacylated-ghrelin-do-not-directly-stimulate-glucose-transport-in-isolated-rodent-skeletal-muscle
#14
Daniel T Cervone, David J Dyck
Emerging evidence implicates ghrelin, a gut-derived, orexigenic hormone, as a potential mediator of insulin-responsive peripheral tissue metabolism. However, in vitro and in vivo studies assessing ghrelin's direct influence on metabolism have been controversial, particularly due to confounding factors such as the secondary rise in growth hormone (GH) after ghrelin injection. Skeletal muscle is important in the insulin-stimulated clearance of glucose, and ghrelin's exponential rise prior to a meal could potentially facilitate this...
July 2017: Physiological Reports
https://www.readbyqxmd.com/read/28660607/the-effects-of-alpha-lipoic-acid-on-diabetic-myopathy
#15
D Jurisic-Erzen, G Starcevic-Klasan, D Ivanac, S Peharec, D Girotto, R Jerkovic
PURPOSE: Increased oxidative stress and impaired antioxidant defense are important mechanisms in the pathogenesis of diabetic myopathy. Since diabetes mellitus type 1 decreases muscle regeneration capacity the present study was designed to determine the influence of alpha-lipoic acid (ALA), a potent biological antioxidant, on the process of regeneration of diabetic rat skeletal muscles. METHODS: 40 Wistar rats were divided into three groups: control (n = 8), untreated diabetic group (n = 16) and ALA treated diabetic group (n = 16)...
June 28, 2017: Journal of Endocrinological Investigation
https://www.readbyqxmd.com/read/28645175/perturbation-to-cholesterol-at-the-neuromuscular-junction-confers-botulinum-neurotoxin-a-sensitivity-to-neonatal-mice
#16
Baskaran Thyagarajan, Joseph G Potian, Joseph J McArdle, Padmamalini Baskaran
Botulinum neurotoxin A (BoNT/A) cleaves SNAP25 at the motor nerve terminals (MNT) and inhibits stimulus evoked acetylcholine release (SEAR). This causes skeletal muscle paralysis. However, younger neonatal mice (<P7; less than 7 days old) are resistant to the neuroparalytic effects of BoNT/A. That is, in vivo injection of BoNT/A at the innervations of Extensor digitorum longus (EDL) muscle in the hindlimbs inhibited the toe spread reflex within 24 hours following BoNT/A injection in adult mouse and in older (> P7) neonatal mice younger than 7 days-age remained unaffected by BoNT/A injection...
June 22, 2017: Toxicological Sciences: An Official Journal of the Society of Toxicology
https://www.readbyqxmd.com/read/28636643/neuromuscular-electrical-stimulation-prevents-skeletal-muscle-dysfunction-in-adjuvant-induced-arthritis-rat
#17
Koichi Himori, Daisuke Tatebayashi, Keita Kanzaki, Masanobu Wada, Håkan Westerblad, Johanna T Lanner, Takashi Yamada
Skeletal muscle weakness is a prominent feature in patients with rheumatoid arthritis (RA). In this study, we investigated whether neuromuscular electrical stimulation (NMES) training protects against skeletal muscle dysfunction in rats with adjuvant-induced arthritis (AIA). AIA was produced by intraarticular injection of complete Freund's adjuvant into the knees of Wistar rats. For NMES training, dorsiflexor muscles were stimulated via a surface electrode (0.5 ms pulse, 50 Hz, 2 s on/4 s off). NMES training was performed every other day for three weeks and consisted of three sets produced at three min intervals...
2017: PloS One
https://www.readbyqxmd.com/read/28621016/acute-effects-of-phenylbutyrate-on-glutamine-branched-chain-amino-acid-and-protein-metabolism-in-skeletal-muscles-of-rats
#18
Milan Holecek, Melita Vodenicarovova, Pavel Siman
Phenylbutyrate (PB) acts as chemical chaperone and histone deacetylase inhibitor, which is used to decrease ammonia in urea cycle disorders and has been investigated for use in the treatment of a number of lethal illnesses. We performed in vivo and in vitro experiments to examine the effects of PB on glutamine (GLN), branched-chain amino acid (BCAA; valine, leucine and isoleucine) and protein metabolism in rats. In the first study, animals were sacrificed one hour after three injections of PB (300mg/kg b...
June 16, 2017: International Journal of Experimental Pathology
https://www.readbyqxmd.com/read/28606434/the-relationships-between-surface-measurements-and%C3%A2-underlying-tendon-autograft-length-for-upper%C3%A2-extremity-reconstructive-surgery
#19
Michael T Milone, Mikael Starecki, Omri Ayalon, Michael W Aversano, Anthony Sapienza
PURPOSE: The availability of tendon grafts is an important consideration for successful upper extremity reconstructive surgery, including flexor or extensor tendon reconstructions, tendon transfers, and ligament reconstructions. Graft selection is based on availability, expendability, ease of harvest, and length. Given variations in patient height and extremity length, existing average values may provide suboptimal insight into actual tendon lengths available. The purpose of this study is, therefore, to pursue a method of estimating available donor tendon lengths based on easily measured anatomical surface landmarks...
June 9, 2017: Journal of Hand Surgery
https://www.readbyqxmd.com/read/28601553/skeletal-muscle-water-t2-as-a-biomarker-of-disease-status-and-exercise-effects-in-patients-with-duchenne-muscular-dystrophy
#20
Ami Mankodi, Noura Azzabou, Thomas Bulea, Harmen Reyngoudt, Hirity Shimellis, Yupeng Ren, Eunhee Kim, Kenneth H Fischbeck, Pierre G Carlier
The purpose of this study was to examine exercise effects on muscle water T2 in patients with Duchenne muscular dystrophy (DMD). In 12 DMD subjects and 19 controls, lower leg muscle fat (%) was measured by Dixon and muscle water T2 and R2 (1/T2) by the tri-exponential model. Muscle water R2 was measured again at 3 hours after an ankle dorsiflexion exercise. The muscle fat fraction was higher in DMD participants than in controls (p < .001) except in the tibialis posterior muscle. Muscle water T2 was measured independent of the degree of fatty degeneration in DMD muscle...
August 2017: Neuromuscular Disorders: NMD
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