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Muscular hypertrophy

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https://www.readbyqxmd.com/read/28214267/a-japanese-male-with-a-novel-ano5-mutation-with-minimal-muscle-weakness-and-muscle-pain-till-his-late-fifties
#1
Masato Kadoya, Katsuhisa Ogata, Mikiya Suzuki, Yutaka Honma, Kazunari Momma, Kana Yatabe, Takuhisa Tamura, Kenichi Kaida, Naomasa Miyata, Ichizo Nishino, Ikuya Nonaka, Mitsuru Kawai
Limb girdle muscular dystrophy type 2L (LGMD2L) is an adult-onset slowly progressive muscular dystrophy associated with anoctamin 5 (ANO5) gene mutation, mainly reported from Northern and Central Europe. We report the case of a Japanese male patient with a novel homozygous mutation of c.2394dup, p.Arg799Thrfs in ANO5 gene, the second patient in the Asian population. He had had marked elevation of creatine kinase (CK) level for more than 10 years with minimal muscular symptoms consisting of muscle stiffness and occasional cramps, preceding the onset of proximal limb weakness...
January 18, 2017: Neuromuscular Disorders: NMD
https://www.readbyqxmd.com/read/28213823/long-term-resistance-exercise-induced-muscular-hypertrophy-is-associated-with-autophagy-modulation-in-rats
#2
Insu Kwon, Yongchul Jang, Joon-Yong Cho, Young C Jang, Youngil Lee
Elevation of anabolism and concurrent suppression of catabolism are critical metabolic adaptations for muscular hypertrophy in response to resistance exercise (RE). Here, we investigated if RE-induced muscular hypertrophy is acquired by modulating a critical catabolic process autophagy. Male Wistar Hannover rats (14 weeks old) were randomly assigned to either sedentary control (SC, n = 10) or resistance exercise (RE, n = 10). RE elicited significant hypertrophy of flexor digitorum profundus (FDP) muscles in parallel with enhancement in anabolic signaling pathways (phosphorylation of AKT, mTOR, and p70S6K)...
February 17, 2017: Journal of Physiological Sciences: JPS
https://www.readbyqxmd.com/read/28165252/cocktail-of-superoxide-dismutase-and-fasudil-encapsulated-in-targeted-liposomes-slows-pah-progression-at-a-reduced-dosing-frequency
#3
Nilesh Gupta, Jahidur Rashid, Eva Nozik-Grayck, Ivan F McMurtry, Kurt R Stenmark, Fakhrul Ahsan
Currently, two or more pulmonary vasodilators are used to treat pulmonary arterial hypertension (PAH), but conventional vasodilators alone cannot reverse disease progression. In this study, we tested the hypothesis that a combination therapy comprising a vasodilator plus a therapeutic agent that slows pulmonary arterial remodeling and right heart hypertrophy is an efficacious alternative to current vasodilator-based PAH therapy. Thus, we encapsulated a cocktail of superoxide dismutase (SOD), a superoxide scavenger, and fasudil, a specific rho-kinase inhibitor, into a liposomal formulation equipped with a homing peptide, CAR...
February 17, 2017: Molecular Pharmaceutics
https://www.readbyqxmd.com/read/28155605/met-activating-genetically-improved-chimeric-factor-1-promotes-angiogenesis-and-hypertrophy-in-adult-myogenesis
#4
Flavio Ronzoni, Gabriele Ceccarelli, Ilaria Perini, Laura Benedetti, Daniela Galli, Francesca Mulas, Martina Balli, Giovanni Magenes, Riccardo Bellazzi, Gabriella Cusella De Angelis, Maurilio Sampaolesi
BACKGROUND: Myogenic progenitor cells (activated satellite cells) are able to express both HGF and its receptor cMet. After muscle injury, HGF-Met stimulation promotes activation and primary division of satellite cells. MAGIC-F1 (Met-Activating Genetically Improved Chimeric Factor-1) is an engineered protein that contains two human Met-binding domains that promotes muscle hypertrophy. MAGIC-F1 protects myogenic precursors against apoptosis and increases their fusion ability enhancing muscle differentiation...
February 1, 2017: Current Pharmaceutical Biotechnology
https://www.readbyqxmd.com/read/28146033/exertional-rhabdomyolysis-in-a-21-year-old-healthy-female-a-case-report
#5
Brianna D McKay, Noelle M Yeo, Nathaniel D M Jenkins, Amelia A Miramonti, Joel T Cramer
The optimal resistance training program to elicit muscle hypertrophy has been recently debated and researched. Although 3 sets of 10 repetitions at 70-80% of the 1-repetition maximum (1RM) is widely recommended, recent studies have shown that low-load (∼30% 1RM), high-repetition (3 sets of 30-40 repetitions) resistance training can elicit similar muscular hypertrophy. Incidentally, this type of resistance training has gained popularity. In the process of testing this hypothesis in a research study in our laboratory, a subject was diagnosed with exertional rhabdomyolysis after completing a resistance training session that involved 3 sets to failure at 30% 1RM...
January 30, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28129289/ultrasound-shear-wave-elastography-and-contrast-enhancement-effective-biomarkers-in-crohn-s-disease-strictures
#6
Cathy Lu, Xianyong Gui, Wenqian Chen, Tak Fung, Kerri Novak, Stephanie R Wilson
BACKGROUND: Inflammation, fibrosis, and muscular hypertrophy lead to thickened bowel in Crohn's disease forming strictures. Ultrasound shear wave elastography (SWE) measures bowel wall stiffness. Contrast-enhanced ultrasound (CEUS) uniquely detects bowel wall inflammation. We aim to correlate SWE of ileal Crohn's disease in vivo to CEUS peak enhancement and pathology grades of inflammation, fibrosis, and muscular hypertrophy. METHODS: In a prospective institutional review board-approved study, 105 consecutive ileal patients with Crohn's disease received ultrasound...
January 26, 2017: Inflammatory Bowel Diseases
https://www.readbyqxmd.com/read/28117338/beta-agonist-stimulation-ameliorates-the-phenotype-of-spinal-and-bulbar-muscular-atrophy-mice-and-patient-derived-myotubes
#7
Carmelo Milioto, Adriana Malena, Eleonora Maino, Maria J Polanco, Caterina Marchioretti, Doriana Borgia, Marcelo Gomes Pereira, Bert Blaauw, Andrew P Lieberman, Roberta Venturini, Mario Plebani, Fabio Sambataro, Lodovica Vergani, Elena Pegoraro, Gianni Sorarù, Maria Pennuto
Spinal and bulbar muscular atrophy (SBMA) is a neuromuscular disease characterized by the loss of lower motor neurons. SBMA is caused by expansions of a polyglutamine tract in the gene coding for androgen receptor (AR). Expression of polyglutamine-expanded AR causes damage to motor neurons and skeletal muscle cells. Here we investigated the effect of β-agonist stimulation in SBMA myotube cells derived from mice and patients, and in knock-in mice. We show that treatment of myotubes expressing polyglutamine-expanded AR with the β-agonist clenbuterol increases their size...
January 24, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28070459/pre-versus-post-exercise-protein-intake-has-similar-effects-on-muscular-adaptations
#8
Brad Jon Schoenfeld, Alan Aragon, Colin Wilborn, Stacie L Urbina, Sara E Hayward, James Krieger
The purpose of this study was to test the anabolic window theory by investigating muscle strength, hypertrophy, and body composition changes in response to an equal dose of protein consumed either immediately pre- versus post-resistance training (RT) in trained men. Subjects were 21 resistance-trained men (>1 year RT experience) recruited from a university population. After baseline testing, participants were randomly assigned to 1 of 2 experimental groups: a group that consumed a supplement containing 25 g protein and 1 g carbohydrate immediately prior to exercise (PRE-SUPP) (n = 9) or a group that consumed the same supplement immediately post-exercise (POST-SUPP) (n = 12)...
2017: PeerJ
https://www.readbyqxmd.com/read/28017949/-impacts-of-physical-exercise-on-remodeling-and-hypertrophy-of-skeletal-muscle
#9
Yoshihiro Sakashita, Takayuki Uchida, Takeshi Nikawa
The skeletal muscle has high sensitivity for the mechanical stress. Because it is enlarged by training, whereas it is easily withered by lack of exercise. When we exercise, skeletal muscle cells per se sense mechanical loading, and muscular remodeling and the muscular hypertrophy occur. It has been revealed that the intracellular signaling through PGC-1α participates in the remodeling of the skeletal muscle, while PGC-1α4, an isoform of PGC-1α, and the dystrophin-glycoprotein complex play important roles in muscular hypertrophy...
2017: Clinical Calcium
https://www.readbyqxmd.com/read/27993200/a-novel-mouse-model-of-high-flow-induced-pulmonary-hypertension-surgically-induced-by-right-pulmonary-artery-ligation
#10
Anchen Zhang, Hongfei Wang, Shengwei Wang, Xiaofan Huang, Ping Ye, Xinling Du, Jiahong Xia
BACKGROUND: This study sought to establish a new model of high-flow pulmonary hypertension (PH) in mice. This model may be useful for studies seeking to reduce the pulmonary vascular resistance and delay the development of PH caused by congenital heart disease. MATERIALS AND METHODS: The right pulmonary artery was ligated via a right posterolateral thoracotomy. Pulmonary hemodynamics was evaluated by right heart catheterization immediately after ligation and at 2, 4, 8, and 12 wk postoperatively...
February 2017: Journal of Surgical Research
https://www.readbyqxmd.com/read/27973464/pathogenesis-of-diverticulosis-and-diverticular-disease
#11
Marjorie M Walker, Angela K Harris
Diverticulosis is defined by the presence of diverticula due to herniation of mucosa and muscularis mucosa through the muscularis propria at sites of vascular penetration in the colon and is asymptomatic in the vast majority affected. There are global differences of distribution, in Western industrialised societies, the most common site is in the right colon, but in Asia left sided diverticulosis predominates. Whilst present in 17.5% of a general population and 42% of all comers at endoscopy it is seen in 71% of those aged ≥80 years...
December 14, 2016: Minerva Gastroenterologica e Dietologica
https://www.readbyqxmd.com/read/27942471/mixed-vascular-nevus-syndrome-a-report-of-four-new-cases-and-a-literature-review
#12
Martino Ruggieri, Agata Polizzi, Serena Strano, Carmelo Schepis, Massimiliano Morano, Giuseppe Belfiore, Stefano Palmucci, Pietro Valerio Foti, Concetta Pirrone, Vito Sofia, Emanuele David, Vincenzo Salpietro, Kshitij Mankad, Pietro Milone
BACKGROUND: Mixed vascular nevus (or nevus vascularis mixtus) represents an admixture of cutaneous vascular malformations of the telangiectatic type and angiospastic spots of nevus anemicus. It can occur as an purely cutaneous trait or as a hallmark of a neurocutaneous phenotype (mixed vascular nevus syndrome) characterised by the combination of: (I) paired vascular (telangiectatic and anemic) twin nevi and brain abnormalities of the Dyke-Davidoff-Masson type (i.e., crossed cerebral/cerebellar hemiatrophy with hypoplasia of the ipsilateral cerebral vessels and homolateral hypertrophy of the skull and sinuses (hyperpneumatisation) with contralateral hemispheric hypertrophy); or (II) paired vascular twin nevi and brain malformations of the Dyke-Davidoff-Masson type in association with systemic abnormalities consisting in facial asymmetry, skeletal anomalies (i...
October 2016: Quantitative Imaging in Medicine and Surgery
https://www.readbyqxmd.com/read/27941492/effects-of-a-modified-german-volume-training-program-on-muscular-hypertrophy-and-strength
#13
Theban Amirthalingam, Yorgi Mavros, Guy C Wilson, Jillian L Clarke, Lachlan Mitchell, Daniel A Hackett
German Volume Training (GVT), or the 10 sets method, has been used for decades by weightlifters to increase muscle mass. To date, no study has directly examined the training adaptations following GVT. The purpose of this study was to investigate the effect of a modified GVT intervention on muscular hypertrophy and strength. Nineteen healthy males were randomly assign to 6 weeks of 10 or 5 sets of 10 repetitions for specific compound resistance exercises included in a split-routine performed 3 times per week...
November 25, 2016: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/27928218/differential-effects-of-heavy-versus-moderate-loads-on-measures-of-strength-and-hypertrophy-in-resistance-trained-men
#14
Brad J Schoenfeld, Bret Contreras, Andrew D Vigotsky, Mark Peterson
The purpose of the present study was to evaluate muscular adaptations between heavy- and moderate-load resistance training (RT) with all other variables controlled between conditions. Nineteen resistance-trained men were randomly assigned to either a strength-type RT routine (HEAVY) that trained in a loading range of 2-4 repetitions per set (n = 10) or a hypertrophy-type RT routine (MODERATE) that trained in a loading range of 8-12 repetitions per set (n = 9). Training was carried out 3 days a week for 8 weeks...
December 2016: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/27906065/dystrophin-deficient-dogs-with-reduced-myostatin-have-unequal-muscle-growth-and-greater-joint-contractures
#15
Joe N Kornegay, Daniel J Bogan, Janet R Bogan, Jennifer L Dow, Jiahui Wang, Zheng Fan, Naili Liu, Leigh C Warsing, Robert W Grange, Mihye Ahn, Cynthia J Balog-Alvarez, Steven W Cotten, Monte S Willis, Candice Brinkmeyer-Langford, Hongtu Zhu, Joe Palandra, Carl A Morris, Martin A Styner, Kathryn R Wagner
BACKGROUND: Myostatin (Mstn) is a negative regulator of muscle growth whose inhibition promotes muscle growth and regeneration. Dystrophin-deficient mdx mice in which myostatin is knocked out or inhibited postnatally have a less severe phenotype with greater total mass and strength and less fibrosis and fatty replacement of muscles than mdx mice with wild-type myostatin expression. Dogs with golden retriever muscular dystrophy (GRMD) have previously been noted to have increased muscle mass and reduced fibrosis after systemic postnatal myostatin inhibition...
April 4, 2016: Skeletal Muscle
https://www.readbyqxmd.com/read/27893858/reversing-age-related-changes-of-the-laryngeal-muscles-by-chronic-electrostimulation-of-the-recurrent-laryngeal-nerve
#16
Michael Karbiener, Jonathan C Jarvis, Justin D Perkins, Hermann Lanmüller, Martin Schmoll, Hanna S Rode, Claus Gerstenberger, Markus Gugatschka
Age related atrophy of the laryngeal muscles -mainly the thyroarytenoid muscle (TAM)- leads to a glottal gap and consequently to a hoarse and dysphonic voice that significantly affects quality of life. The aim of our study was to reverse this atrophy by inducing muscular hypertrophy by unilateral functional electrical stimulation (FES) of the recurrent laryngeal nerve (RLN) in a large animal model using aged sheep (n = 5). Suitable stimulation parameters were determined by fatiguing experiments of the thyroarytenoid muscle in an acute trial...
2016: PloS One
https://www.readbyqxmd.com/read/27886864/an-autopsy-case-of-refractory-pulmonary-hypertension-with-sarcoidosis
#17
Hiroki Ota, Keishi Sugino, Toshimasa Uekusa, Tamiko Takemura, Sakae Homma
A 63-year-old man with sarcoidosis-associated pulmonary hypertension (SAPH) died suddenly of decompensated right heart failure. At autopsy, microscopy showed subpleural and interlobular fibrosis in both upper lobes, with marked broncho-bronchiolectasis, as well as bronchovascular bundle fibrosis and fibrotic organization in alveolar lumens, which are consistent with pulmonary sarcoidosis. Intimal fibrosis and medial hypertrophy were noted in the proximal elastic to distal muscular pulmonary arteries (Heath-Edwards, grades II-III) within intensive fibrotic lesions...
November 2016: Respiratory Investigation
https://www.readbyqxmd.com/read/27874066/cl316-243-a-%C3%AE-3-adrenergic-receptor-agonist-induces-muscle-hypertrophy-and-increased-strength
#18
Daniela Puzzo, Roberto Raiteri, Clotilde Castaldo, Raffaele Capasso, Ester Pagano, Mariateresa Tedesco, Walter Gulisano, Lisaveta Drozd, Pellegrino Lippiello, Agostino Palmeri, Pietro Scotto, Maria Concetta Miniaci
Studies in vitro have demonstrated that β3-adrenergic receptors (β3-ARs) regulate protein metabolism in skeletal muscle by promoting protein synthesis and inhibiting protein degradation. In this study, we evaluated whether activation of β3-ARs by the selective agonist CL316,243 modifies the functional and structural properties of skeletal muscles of healthy mice. Daily injections of CL316,243 for 15 days resulted in a significant improvement in muscle force production, assessed by grip strength and weight tests, and an increased myofiber cross-sectional area, indicative of muscle hypertrophy...
November 22, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27873355/isoquercitrin-protects-against-pulmonary-hypertension-via-inhibiting-pasmcs-proliferation
#19
Yongtao Zhang, Yuqian Cui, Wei Deng, Hao Wang, Weidong Qin, Chengmin Huang, Chen Li, Jianning Zhang, Yuan Guo, Dawei Wu, Haipeng Guo
Pulmonary vascular remodeling is a common feature among the heterogeneous disorders that cause pulmonary arterial hypertension (PAH), and pulmonary arterial smooth muscle cells (PASMCs) proliferation impact the long-term prognosis of the patient. Isoquercitrin (IQC) is a flavonoid with anti-oxidative, anti-inflammatory and anti-proliferative activations. This study aimed to investigate whether IQC could prevent PASMCs proliferation and vascular remodeling in monocrotaline (MCT) induced PAH. Male Wistar rats were administered with vehicle or 0...
November 22, 2016: Clinical and Experimental Pharmacology & Physiology
https://www.readbyqxmd.com/read/27832095/increased-muscular-5%C3%AE-dihydrotestosterone-in-response-to-resistance-training-relates-to-skeletal-muscle-mass-and-glucose-metabolism-in-type-2-diabetic-rats
#20
Naoki Horii, Koji Sato, Noboru Mesaki, Motoyuki Iemitsu
Regular resistance exercise induces skeletal muscle hypertrophy and improvement of glycemic control in type 2 diabetes patients. Administration of dehydroepiandrosterone (DHEA), a sex steroid hormone precursor, increases 5α-dihydrotestosterone (DHT) synthesis and is associated with improvements in fasting blood glucose level and skeletal muscle hypertrophy. Therefore, the aim of this study was to investigate whether increase in muscle DHT levels, induced by chronic resistance exercise, can contribute to skeletal muscle hypertrophy and concomitant improvement of muscular glucose metabolism in type 2 diabetic rats...
2016: PloS One
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