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Muscle hypertrophy

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https://www.readbyqxmd.com/read/28444312/early-posthatch-thermal-stress-affects-breast-muscle-development-and-satellite-cell-growth-and-characteristics-in-broilers
#1
Yogev Piestun, Tomer Patael, Shlomo Yahav, Sandra G Velleman, Orna Halevy
Heat or cold stress, can disrupt well-being and physiological responses in birds. This study aimed to elucidate the effects of continuous heat exposure in the first 2 wk of age on muscle development in broilers, with an emphasis on the pectoralis muscle satellite cell population. Chicks were reared for 13 d under either commercial conditions or a temperature regime that was 5°C higher. Body and muscle weights, as well as absolute muscle growth were lower in heat-exposed chicks from d 6 onward. The number of satellite cells derived from the experimental chicks was higher in the heat-treated group on d 3 but lower on d 8 and 13 compared to controls...
April 24, 2017: Poultry Science
https://www.readbyqxmd.com/read/28443535/effects-of-immunocastration-and-%C3%AE-adrenergic-agonists-on-the-performance-and-carcass-traits-of-feedlot-finished-nellore-cattle
#2
D S Antonelo, M R Mazon, K E Z Nubiato, J F M Gómez, D J Brigida, R C Gomes, A S Netto, P R Leme, S L Silva
β-Adrenergic agonists (β-AA) are non-hormonal growth promoters which promote muscle hypertrophy in supplemented animals. The effects of two β-AA in combination with the immunocastration technique on the performance and carcass traits were evaluated using 96 feedlot Nellore males in a randomized complete block design with two sex conditions (immunocastrated (IC) v. non-castrated (NC)) and three treatments: CON (no β-agonists added), RH (300 mg of ractopamine hydrochloride/day, for 33 days) or ZH (80 mg of zilpaterol·hydrochloride animal/day for 30 days, removed 3 days for required withdrawal period)...
April 26, 2017: Animal: An International Journal of Animal Bioscience
https://www.readbyqxmd.com/read/28442457/a-pseudotumour-of-the-thigh-tensor-fasciae-latae-muscle-hypertrophy-due-to-an-underlying-abductor-tendon-tear
#3
Ruben Petrus Johannes Meijer, Jorrit Jasper, Barbara Snoeker, Joris Jansen
We present a patient with an asymptomatic unilateral swelling of the anterolateral thigh. MRI showed hypertrophy of the tensor fasciae latae muscle due to an underlying gluteus minimus tendon tear.Abductor tendon tears can present with swelling of the thigh due to secondary tensor fasciae latae muscle hypertrophy.
April 24, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28441958/metformin-to-augment-strength-training-effective-response-in-seniors-masters-study-protocol-for-a-randomized-controlled-trial
#4
Doug E Long, Bailey D Peck, Jenny L Martz, S Craig Tuggle, Heather M Bush, Gerald McGwin, Philip A Kern, Marcas M Bamman, Charlotte A Peterson
BACKGROUND: Muscle mass and strength are strong determinants of a person's quality of life and functional independence with advancing age. While resistance training is the most effective intervention to combat age-associated muscle atrophy (sarcopenia), the ability of older adults to increase muscle mass and strength in response to training is blunted and highly variable. Thus, finding novel ways to complement resistance training to improve muscle response and ultimately quality of life among older individuals is critical...
April 26, 2017: Trials
https://www.readbyqxmd.com/read/28441064/bacillus-calmette-guerin-alleviates-airway-inflammation-and-remodeling-by-preventing-tgf-%C3%AE-1-induced-epithelial-mesenchymal-transition
#5
Xinrui Tian, Xinli Tian, Rujie Huo, Qin Chang, Guoping Zheng, Yan Du, Yan Chen, Bo Niu
Bacillus Calmette-Guerin (BCG) is a potent agent for the prevention of tuberculosis. Current studies have regarded BCG as an immunomodulator. However, there is little information on whether it can be used to inhibit airway inflammation and airway remodeling caused by asthma. Therefore, in this study, we investigate the role of epithelial-mesenchymal transition (EMT) in airway inflammation and airway remodeling as well as the possible therapeutic mechanism of BCG for the treatment of asthma. Wistar rats were sensitized and challenged by ovalbumin for 2 weeks or 8 weeks...
April 25, 2017: Human Vaccines & Immunotherapeutics
https://www.readbyqxmd.com/read/28437270/surgical-resolution-of-bilateral-hypertrophy-of-masseter-muscle-through-intraoral-approach
#6
Guilherme Dos Santos Trento, Leonardo Silva Benato, Nelson Luis Barbosa Rebellato, Leandro Eduardo Klüppel
Masseter muscle hypertrophy is an untypical anomaly with no definite cause and its diagnosis is easily completed through physical examination and imaging examinations. In some cases, patient may report signs and symptoms of well-localizated pain. However, it is generally asymptomatic and patient's chief complaint is about esthetic because of facial asymmetry. In this case, surgery is carefully indicated. The aim of this article is to report a case of a male patient with no painful and functional complaints but an important unease over his facial asymmetry...
April 21, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28434908/duchenne-muscular-dystrophy-in-a-female-with-compound-heterozygous-contiguous-exon-deletions
#7
Eri Takeshita, Narihiro Minami, Kumiko Minami, Mikiya Suzuki, Takeya Awashima, Akihiko Ishiyama, Hirofumi Komaki, Ichizo Nishino, Masayuki Sasaki
Females with Duchenne muscular dystrophy (DMD) and Becker muscular dystrophy (BMD) mutations rarely exhibit clinical symptoms from childhood, although potential mechanisms for symptoms associated with DMD and BMD in females have been reported. We report the case of a female DMD patient with a clinical course indistinguishable from that of a male DMD patient, and who possessed compound heterozygous contiguous exon deletions in the dystrophin gene. She exhibited Gowers' sign, calf muscle hypertrophy, and a high serum creatine kinase level at 2 years...
April 3, 2017: Neuromuscular Disorders: NMD
https://www.readbyqxmd.com/read/28434633/echocardiographic-evaluation-of-left-ventricular-mass-index-in-children-with-hypospadias-after-hormonal-stimulation-with-topical-testosterone-a-randomized-controlled-trial
#8
Elisabeth Campos de Andrade, Kelly Christina de Castro Paiva, Sarah da Silva Guedes, Mariana Lima C Souza, Marina Novellino Pereira, Laura Pimenta Miana, André Avarese de Figueiredo, José de Bessa, José Murillo B Netto
INTRODUCTION: Testosterone is often used in the preoperative period of hypospadias surgery. Previous studies have demonstrated the presence of androgen receptors in cardiac myocytes that can modulate the phenotype. The use of supraphysiological doses of androgens can lead to toxicity on the heart muscle and, in some cases, to left ventricular hypertrophy. This randomized double blind controlled clinical trial aims to evaluate the effect of topical testosterone on left ventricular mass index in boys with hypospadias...
April 10, 2017: Journal of Pediatric Urology
https://www.readbyqxmd.com/read/28433477/novel-mutations-in-the-c-terminal-region-of-gmppb-causing-limb-girdle-muscular-dystrophy-overlapping-with-congenital-myasthenic-syndrome
#9
Sushan Luo, Shuang Cai, Susan Maxwell, Dongyue Yue, Wenhua Zhu, Kai Qiao, Zhen Zhu, Lei Zhou, Jianying Xi, Jiahong Lu, David Beeson, Chongbo Zhao
Mutations in the GMPPB gene may underlie both limb girdle muscular dystrophy (LGMD) and congenital myasthenic syndrome (CMS). Forty-one cases have been reported to date and hotspot mutations are emerging in the Caucasian population. Clinical and pathological features of 5 patients with compound heterozygous GMPPB mutations were collected and retrospectively reviewed. In vitro functional analysis was performed to investigate the pathogeneity of GMPPB variants. The patients presented with proximal limb weakness in their first to second decades...
March 10, 2017: Neuromuscular Disorders: NMD
https://www.readbyqxmd.com/read/28432282/loss-of-function-myostatin-mutation-increases-insulin-sensitivity-and-browning-of-white-fat-in-meishan-pigs
#10
Chunbo Cai, Lili Qian, Shengwang Jiang, Youde Sun, Qingqing Wang, Dezun Ma, Gaojun Xiao, Biao Li, Shanshan Xie, Ting Gao, Yaoxing Chen, Jie Liu, Xiaorong An, Wentao Cui, Kui Li
Myostatin-deficient mice showed a remarkable hypertrophy of skeletal muscle, with a decreased fat mass and enhanced insulin sensitivity. Currently, it is unclear if the inhibition of myostatin could be used as an approach to treat human obesity and insulin resistance. In this study, we investigated if the inhibition of porcine myostatin has any effect on fat deposition and insulin sensitivity using genetically engineered Meishan pigs containing a myostatin loss-of-function mutation (Mstn -/- ). Our results indicated that, when compared with wild-type pigs, the amount of subcutaneous fat and leaf fat of Mstn -/- pigs were significantly decreased mainly due to the browning of subcutaneous adipose tissue...
April 4, 2017: Oncotarget
https://www.readbyqxmd.com/read/28432058/mk5-haplodefficiency-attenuates-hypertrophy-and-preserves-diastolic-function-during-remodeling-induced-by-chronic-pressure-overload-in-the-mouse-heart
#11
Sherin Nawaito, Dharmendra Dingar, Pramod Sahadevan, Bahira Hussein, Fatiha Sahmi, Yanfen Shi, Marc-Antoine Gillis, Matthias Gaestel, Jean-Claude Tardif, Bruce G Allen
MK5 is a protein serine and threonine kinase that is activated by p38 MAPK and the atypical MAPKs ERK3 and ERK4. The physiological function(s) of MK5 remain unknown. Herein we examine the effect of MK5 haplodeficiency on cardiac function and myocardial remodeling. At 12-weeks of age, MK5 haplodeficient mice (MK5(+/-)) were smaller than age-matched wild-type litter mates (MK5(+/+)), with similar diastolic function but reduced systolic function. Transverse aortic constriction (TAC) was employed to induce a chronic pressure overload in twelve-week-old male MK5(+/-) and MK5(+/+) mice...
April 21, 2017: American Journal of Physiology. Heart and Circulatory Physiology
https://www.readbyqxmd.com/read/28428073/isosteviol-prevents-the-prolongation-of-action-potential-in-hypertrophied-cardiomyoctyes-by-regulating-transient-outward-potassium-and-l-type-calcium-channels
#12
Zhuo Fan, Nanying Lv, Xiao Luo, Wen Tan
Cardiac hypertrophy is a thickening of the heart muscle that is associated with cardiovascular diseases such as hypertension and myocardial infarction. It occurs initially as an adaptive process against increased workloads and often leads to sudden arrhythmic deaths. Studies suggest that the lethal arrhythmia is attributed to hypertrophy-induced destabilization of cardiac electrical activity, especially the prolongation of the action potential. The reduced activity of Ito is demonstrated to be responsible for the ionic mechanism of prolonged action potential duration and arrhythmogeneity...
April 17, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28426081/total-substitution-of-dietary-fish-oil-by-vegetable-oils-stimulates-muscle-hypertrophic-growth-in-senegalese-sole-and-the-upregulation-of-fgf6
#13
Graciliana Lopes, Luís Filipe Costa Castro, Luísa Maria Pinheiro Valente
The long term effects of fish oil (FO) substitution by increasing the levels of vegetable oils (VO), 0% (CTR), 50% (VO50) and 100% (VO100), in diets for Senegalese sole were evaluated in terms of skeletal muscle cellularity and expression of related genes. After 140 days of feeding, all fish had similar body weight and length. The inclusion of 50% VO did not result in differences in muscle cellularity, but dorsal muscle cross-sectional area and fast-twitch fibre diameter increased in fish fed total FO substitution, whilst fibre density was reduced (P < 0...
April 20, 2017: Food & Function
https://www.readbyqxmd.com/read/28422819/gnaq-tt-695-694-gc-polymorphism-is-associated-with-increased-gq-expression-vascular-reactivity-and-myocardial-injury-after-coronary-artery-bypass-surgery
#14
Ulrich H Frey, Stefanie Klenke, Anna Mitchell, Tim Knüfermann, Heinz Jakob, Matthias Thielmann, Winfried Siffert, Jürgen Peters
BACKGROUND: Angiotensin II receptor type 1-mediated activation of the α-subunit of the heterotrimeric Gq protein evokes increased vasoconstriction and may promote hypertrophy-induced myocardial damage. The authors recently identified a TT(-695/-694)GC polymorphism in the human Gq promoter, the GC allele being associated with an increased prevalence of cardiac hypertrophy. In this article, the authors tested whether the TT(-695/-694)GC polymorphism is associated with differences in (1) myocardial Gq protein expression, (2) vascular reactivity, and (3) myocardial damage after coronary artery bypass grafting...
April 19, 2017: Anesthesiology
https://www.readbyqxmd.com/read/28422320/mir-34b-modulates-skeletal-muscle-cell-proliferation-and-differentiation
#15
Zhixiong Tang, Huiling Qiu, Lan Luo, Nian Liu, Jiasheng Zhong, Kang Kang, Deming Gou
Myogenesis involves myoblast proliferation and differentiation to myocytes, followed by fusion and hypertrophy to form myotubes during muscle development. Increasing evidence showed that microRNAs (miRNAs) play important roles in the regulation of myogenesis. We have previously revealed that miR-34b is steadily increased during this process. This miRNA regulates differentiation in various cell types, though its function in myogenesis remains to be elucidated. In this study, we show that miR-34b represses muscle cell proliferation and promotes myotube formation...
April 19, 2017: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/28417963/loop-diuretics-affect-skeletal-myoblast-differentiation-and-exercise-induced-muscle-hypertrophy
#16
Shintaro Mandai, Susumu Furukawa, Manami Kodaka, Yutaka Hata, Takayasu Mori, Naohiro Nomura, Fumiaki Ando, Yutaro Mori, Daiei Takahashi, Yuki Yoshizaki, Yuri Kasagi, Yohei Arai, Emi Sasaki, Sayaka Yoshida, Yasuro Furuichi, Nobuharu L Fujii, Eisei Sohara, Tatemitsu Rai, Shinichi Uchida
Muscle wasting or sarcopenia contributes to morbidity and mortality in patients with cancer, renal failure, or heart failure, and in elderly individuals. Na(+)-K(+)-2Cl(-) cotransporter 1 (NKCC1) is highly expressed in mammalian skeletal muscle, where it contributes to the generation of membrane ion currents and potential. However, the physiologic function of NKCC1 in myogenesis is unclear. We investigated this issue using the NKCC1 inhibitors bumetanide and furosemide, which are commonly used loop diuretics...
April 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28417056/therapeutic-effect-of-prostaglandin-e1-in-monocrotaline-induced-pulmonary-arterial-hypertension-rats
#17
Jae Chul Lee
Pulmonary arterial hypertension (PAH) is a severe pulmonary vascular disease characterized by sustained increase in pulmonary arterial pressure and excessive thickening and remodeling of distal small pulmonary arteries. During disease progression, PAH include increase in mean pulmonary arterial pressure, right ventricular (RV) enlargement, increased pulmonary vascular resistance, and smooth muscle hypertrophy in pulmonary arterioles. Several anti-PAH therapies targeting various pathways involved in PAH progression have been approved by the Food and Drug Adminstration...
March 2017: Anatomy & Cell Biology
https://www.readbyqxmd.com/read/28414812/deficiency-of-superoxide-dismutase-promotes-cerebral-vascular-hypertrophy-and-vascular-dysfunction-in-hyperhomocysteinemia
#18
Sanjana Dayal, Gary L Baumbach, Erland Arning, Teodoro Bottiglieri, Frank M Faraci, Steven R Lentz
There is an emerging consensus that hyperhomocysteinemia is an independent risk factor for cerebral vascular disease and that homocysteine-lowering therapy protects from ischemic stroke. However, the mechanisms by which hyperhomocysteinemia produces abnormalities of cerebral vascular structure and function remain largely undefined. Our objective in this study was to define the mechanistic role of superoxide in hyperhomocysteinemia-induced cerebral vascular dysfunction and hypertrophy. Unlike previous studies, our experimental design included a genetic approach to alter superoxide levels by using superoxide dismutase 1 (SOD1)-deficient mice fed a high methionine/low folate diet to produce hyperhomocysteinemia...
2017: PloS One
https://www.readbyqxmd.com/read/28413736/targeted-intraspinal-radiofrequency-ablation-for-lumbar-spinal-stenosis
#19
Robert E Jacobson, Michelle Granville, Jesse Hatgis DO
INTRODUCTION: By using a combination of magnetic resonance imaging (MRI) and computed tomography (CT) of the lumbar spine, it is possible to distinguish between spinal stenosis caused by bone compression and specific soft tissue epidural intraspinal lesions that cause localized spinal canal stenosis and neural compression. Examples include facet cysts and yellow ligament hypertrophy. Many of these patients are elderly with medical comorbidities that make open surgery problematic. MATERIALS & METHODS: This is a study of patients with predominantly soft tissue stenosis being treated with targeted intraspinal radiofrequency (RF) heat ablation...
March 10, 2017: Curēus
https://www.readbyqxmd.com/read/28413470/identification-of-genes-associated-with-the-effect-of-inflammation-on-the-neurotransmission-of-vascular-smooth-muscle-cell
#20
Shujie Gan, Shenlong Qiu, Yiwen Feng, Yanping Zhang, Qin Qian, Zhong Wan, Jingdong Tang
Vascular smooth muscle cell (VSMC) accumulation and hypertrophy are common in vascular disorders, and inflammation has a crucial role in the development of these diseases. To investigate the effect of inflammation on the neurotransmission of VSMC, bioinformatic analysis was performed, following next generation sequencing. Genes of lipopolysaccharide (LPS)-treated A7r5 cells and phosphate-buffered saline (PBS)-treated A7r5 cells were sequenced via next generation sequencing, and each assay was repeated three times...
April 2017: Experimental and Therapeutic Medicine
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