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https://www.readbyqxmd.com/read/29156851/cartilage-reinforcement-graft-versus-fascia-graft-in-tympanoplasty
#1
Emre Ocak, Süha Beton, Vedat Taş, Cem Meço
Background/aim: The purpose of this study was to compare cartilage reinforcement graft results with temporalis fascia graft alone in terms of hearing and anatomical outcomes in tympanoplasty. Materials and methods: Patients who underwent tympanoplasty with/without ossiculoplasty and/or mastoidectomy at a university hospital from 2006 through 2013 were reviewed retrospectively. The patients were divided into those grafted with temporalis muscle fascia alone and with fascia reinforced with cartilage. The postoperative air bone gap, gain in hearing thresholds, and graft status were evaluated for each group...
August 23, 2017: Turkish Journal of Medical Sciences
https://www.readbyqxmd.com/read/29152859/deletion-of-the-egf-receptor-in-vascular-smooth-muscle-cells-prevents-chronic-angiotensin-ii-induced-arterial-wall-stiffening-and-media-thickening
#2
Barbara Schreier, Mirja Hünerberg, Sigrid Mildenberger, Sindy Rabe, Daniel Bethmann, Claudia Wickenhauser, Michael Gekle
AIM: In vivo vascular smooth muscle cell (VSMC) EGF receptor (EGFR) contributes to acute angiotensin II (AII) effects on vascular tone and blood pressure. The ubiquitously expressed EGFR has been implicated in vascular remodeling preceding end-organ damage by pharmacological inhibition, and AII signaling in cultured vascular cells is partly EGFR dependent. However the role of VSMC-EGFR in vivo during AII-induced pathophysiological processes is not known. METHODS: The present study assesses the in vivo relevance of VSMC-EGFR during chronic AII challenge without further stressors, using a mouse model with inducible, VSMC-specific EGFR knock out (VSMC-EGFR-KO)...
November 20, 2017: Acta Physiologica
https://www.readbyqxmd.com/read/29152605/hepatic-natural-killer-t-cell-and-cd8-t-cell-signatures-in-mice-with-nonalcoholic-steatohepatitis
#3
Jashdeep Bhattacharjee, Michelle Kirby, Samir Softic, Lili Miles, Rosa-Maria Salazar-Gonzalez, Pranav Shivakumar, Rohit Kohli
Hepatic inflammation is a key pathological feature of Nonalcoholic Steatohepatitis (NASH). Natural Killer T-cells (NKT) and CD8+ T-cells are known to play an important role in obesity related adipose tissue inflammation. We hypothesized that these same inflammatory phenotypes would be present in progressive NASH. We used a previously established high fat high carbohydrate (HFHC) murine obesogenic diet model of progressive NASH to investigate the role of NKT cells and CD8+ T-cells in C57Bl6/J mice. Further, to better understand the impact of these cell populations; CD1d-deficient and CD8+ T-cell depleted mice were subjected to HFHC diet for 16 weeks...
June 2017: Hepatol Commun
https://www.readbyqxmd.com/read/29150696/impact-of-prolonged-overfeeding-on-skeletal-muscle-mitochondria-in-healthy-individuals
#4
Frederico G S Toledo, Darcy L Johannsen, Jeffrey D Covington, Sudip Bajpeyi, Bret Goodpaster, Kevin E Conley, Eric Ravussin
AIMS/HYPOTHESES: Reduced mitochondrial capacity in skeletal muscle has been observed in obesity and type 2 diabetes. In humans, the aetiology of this abnormality is not well understood but the possibility that it is secondary to the stress of nutrient overload has been suggested. To test this hypothesis, we examined whether sustained overfeeding decreases skeletal muscle mitochondrial content or impairs function. METHODS: Twenty-six healthy volunteers (21 men, 5 women, age 25...
November 17, 2017: Diabetologia
https://www.readbyqxmd.com/read/29150297/prolonged-stretching-of-the-ankle-plantarflexors-elicits-muscle-tendon-adaptations-relevant-to-ankle-gait-kinetics-in-children-with-spastic-cerebral-palsy
#5
Teresa Martín Lorenzo, Eduardo Rocon, Ignacio Martínez Caballero, Ana Ramírez Barragán, Sergio Lerma Lara
Tissue related ankle hyper-resistance has been reported to contribute to equinus gait in children with spastic cerebral palsy. Hence, ankle plantarflexor stretching programs have been developed in order to restore passive ankle dorsiflexion. Despite high quality evidence on the limited effects of stretching on passive joint mobility, further muscle-tendon adaptations have been reported which may impact gait performance. As such, children with spastic cerebral palsy subject to long-term manual static stretching achieved dorsiflexion gains through the reduction of muscle and fascicle strain whilst preserving tendon strain, and prolonged use of ankle-foot orthoses achieved similar dorsiflexion gains through increased tendon strain whilst preserving muscle and fascicle strain...
November 2017: Medical Hypotheses
https://www.readbyqxmd.com/read/29149028/changes-of-cerebral-and-or-peripheral-adenosine-a%C3%A2-receptor-and-igf-i-concentrations-under-extended-sleep-duration-in-rats
#6
Mounir Chennaoui, Pierrick J Arnal, Rodolphe Dorey, Fabien Sauvet, Sylvain Ciret, Thierry Gallopin, Damien Leger, Catherine Drogou, Danielle Gomez-Merino
Extended sleep improves sustained attention and reduces sleep pressure in humans. Downregulation of adenosine A₁ receptor (A₁R) and modulation of the neurotrophic factor insulin growth factor-1 (IGF-I) in brain structures controlling attentional capacities could be involved. In the frontal cortex and hippocampus of rats, we measured adenosine A₁R and IGF-I protein concentrations after photoperiod-induced sleep extension. Two groups of twelve rats were adapted over 14 days to a habitual (CON) 12:12 light-dark (LD) schedule and an extended (EXT) 16:8 LD schedule...
November 17, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29146412/skeletal-muscle-overexpression-of-nicotinamide-phosphoribosyl-transferase-in-mice-coupled-with-voluntary-exercise-augments-exercise-endurance
#7
Sheila R Costford, Bram Brouwers, Meghan E Hopf, Lauren M Sparks, Mauro Dispagna, Ana P Gomes, Heather H Cornnell, Chris Petucci, Peter Phelan, Hui Xie, Fanchao Yi, Glenn A Walter, Timothy F Osborne, David A Sinclair, Randall L Mynatt, Julio E Ayala, Stephen J Gardell, Steven R Smith
OBJECTIVE: Nicotinamide phosphoribosyl transferase (NAMPT) is the rate-limiting enzyme in the salvage pathway that produces nicotinamide adenine dinucleotide (NAD(+)), an essential co-substrate regulating a myriad of signaling pathways. We produced a mouse that overexpressed NAMPT in skeletal muscle (NamptTg) and hypothesized that NamptTg mice would have increased oxidative capacity, endurance performance, and mitochondrial gene expression, and would be rescued from metabolic abnormalities that developed with high fat diet (HFD) feeding...
November 6, 2017: Molecular Metabolism
https://www.readbyqxmd.com/read/29145886/are-mice-good-models-for-human-neuromuscular-disease-comparing-muscle-excursions-in-walking-between-mice-and-humans
#8
Xiao Hu, James P Charles, Turgay Akay, John R Hutchinson, Silvia S Blemker
BACKGROUND: The mouse is one of the most widely used animal models to study neuromuscular diseases and test new therapeutic strategies. However, findings from successful pre-clinical studies using mouse models frequently fail to translate to humans due to various factors. Differences in muscle function between the two species could be crucial but often have been overlooked. The purpose of this study was to evaluate and compare muscle excursions in walking between mice and humans. METHODS: Recently published musculoskeletal models of the mouse hindlimb and human lower limb were used to simulate muscle-tendon dynamics during mouse and human walking, a key daily activity...
November 16, 2017: Skeletal Muscle
https://www.readbyqxmd.com/read/29141991/human-sex-hormone-binding-globulin-does-not-provide-metabolic-protection-against-dysglycemia-in-mice
#9
Yael Sofer, Nava Nevo, Michal Vechoropulus, Gabi Shefer, Esther Osher, Nathan Landis, Geoffrey L Hammond, Naftali Stern
BACKGROUND: Sex hormone binding globulin (SHBG) is the main transporter of sex hormones in most vertebrates. Low SHBG levels have been linked to increased propensity for diabetes and metabolic syndrome. Polymorphisms of the SHBG gene linked to low SHBG protein levels, also strongly predicted increased risk of type 2 diabetes, thus raising the possibility that SHBG may play a role in the in the pathogenesis of insulin resistance and diabetes. AIM: To examine whether expression of human SHBG in mice may ameliorate the development of diabetes and metabolic syndrome in response to a high fat diet...
November 15, 2017: Endocrine Connections
https://www.readbyqxmd.com/read/29141853/the-effects-of-resistance-exercise-on-biomarkers-of-breast-cancer-prognosis-a-pooled-analysis-of-three-randomized-trials
#10
Kerri Winters-Stone, Lisa J Wood, Sydnee Stoyles, Nathan Dieckmann
BACKGROUND: Using a secondary data analysis from randomized controlled trials comparing one year of resistance exercise (N=109) to a placebo control condition (N=106) in postmenopausal, post-treatment breast cancer survivors, we investigated the influence of resistance training and changes in body composition on markers associated with cancer progression. METHODS: Measures included serum levels of insulin, IGF-1, IGFBP1-3, leptin, serum amyloid A (SAA), adiponectin, C-reactive protein (CRP), IL-1β, TNF-α, IL-6, and IL-8 and body composition (total, lean and fat mass in kg) by DXA at baseline, 6, and 12-months...
November 15, 2017: Cancer Epidemiology, Biomarkers & Prevention
https://www.readbyqxmd.com/read/29140994/copy-number-gains-at-chr3p25-and-chr11p11-are-associated-with-lymph-node-involvement-and-survival-in-muscle-invasive-bladder-tumors
#11
Karla J Lindquist, Thomas Sanford, Terence W Friedlander, Pamela L Paris, Sima P Porten
Patients with muscle-invasive bladder cancer (MIBC) have poorer prognoses if cancer has metastasized to the lymph nodes. Genomic markers of lymph node involvement (LNI) would be useful for treatment planning, especially if measured at the biopsy stage, but large-scale studies of tumor tissue at any stage are needed to discover robust markers of LNI. We performed a genome-wide query of copy number alterations (CNA) in 237 MIBC surgical tumor specimens from patients in The Cancer Genome Atlas who had radical cystectomy and lymphadenectomy without neoadjuvant treatment...
2017: PloS One
https://www.readbyqxmd.com/read/29140186/acute-effect-of-two-self-myofascial-release-protocols-on-hip-and-ankle-range-of-motion
#12
Amandda de Souza, Cristiano Gomes Sanchotene, Cristiano Moreira da Silva Lopes, Jader Alfredo Beck, Affonso Celso Kulevicz da Silva, Suzana Matheus Pereira, Caroline Ruschel
CONTEXT: Self-myofascial release (SMR) is an intervention popularly used by rehabilitation, fitness, and sports professionals to improve recovery and performance. In SMR, the athlete/patient himself applies pressure to the muscle and fascia, using various tools such as balls, rods, foam rolls and massagers. OBJECTIVE: This study aimed to evaluate the acute effect of two SMR protocols (short- and long-term) of the posterior thigh and calf muscles on hip and ankle range of motion (ROM) in physically active men...
November 15, 2017: Journal of Sport Rehabilitation
https://www.readbyqxmd.com/read/29136214/effects-of-dietary-supplemental-bile-acids-on-performance-carcass-characteristics-serum-lipid-metabolites-and-intestinal-enzyme-activities-of-broiler-chickens
#13
Wenqing Lai, Weigang Huang, Bing Dong, Aizhi Cao, Wenjuan Zhang, Juntao Li, Hui Wu, Liying Zhang
The objective of the present study was to evaluate the effect of bile acids derived from swine on the growth performance, carcass traits, serum lipid metabolites and intestinal enzyme activities in broiler chickens. Four hundred thirty-two 1-day-old Arbor Acres male broilers were randomly assigned to 4 treatments with 6 replicates of 18 chicks each for 42 d. The experimental treatments received a corn-soybean basal diet containing lard and were as follows: 0 (control), 40 mg, 60 mg, and 80 mg bile acids/kg of diet...
November 9, 2017: Poultry Science
https://www.readbyqxmd.com/read/29131494/antimicrobial-emulsifier-glycerol-monolaurate-induces-metabolic-syndrome-gut-microbiota-dysbiosis-and-systemic-low-grade-inflammation-in-low-fat-diet-fed-mice
#14
Zengliang Jiang, Minjie Zhao, Hui Zhang, Yang Li, Mengyun Liu, Fengqin Feng
SCOPE: Glycerol monolaurate (GML) was widely consumed worldwide in food industry, and considered as safe, yet for chronic diseases, supporting scientific data remain sparse. This study was to investigate whether dietary GML induces metabolic syndrome, gut microbiota dysbiosis and systemic low-grade inflammation. METHODS AND RESULTS: GML-induced occurrence of metabolic syndrome, gut microbiota alterations and systemic low-grade inflammation were investigated. Our results demonstrated that GML induced metabolic syndrome by significantly increasing the body weight, weight gain, food intake, body fat, fat droplet size and percentage of epididymal fat, serum triglycerides (TG), LDL and atherogenic index, and decreasing the body muscle ratio, liver weight and HDL, compared to the CON group...
November 13, 2017: Molecular Nutrition & Food Research
https://www.readbyqxmd.com/read/29129081/identification-of-mature-atherosclerotic-plaque-proteome-signatures-using-data-independent-acquisition-mass-spectrometry
#15
Nicole Hansmeier, Josef Buttigieg, Pankaj Kumar, Shaneen Pelle, Kyoo Yoon Choi, David Kopriva, Tzu-Chiao Chao
Atherosclerosis is a chronic inflammatory disease with complex pathobiology and one of the most common causes of cardiovascular events. The process is characterized by complex vascular remodeling processes that require the actions of numerous proteins. The composition of atherosclerotic plaque is increasingly recognized as a major factor governing the occurrence of cardiovascular or neurological symptoms. In order to gain deeper insights in the composition of atherosclerotic plaques, we created quantitative proteome profiles of advanced plaque tissues of six male patients undergoing carotid endarterectomy for stroke prevention...
November 11, 2017: Journal of Proteome Research
https://www.readbyqxmd.com/read/29127601/interpreting-adaptation-to-concurrent-compared-with-single-mode-exercise-training-some-methodological-considerations
#16
REVIEW
Jackson J Fyfe, Jeremy P Loenneke
Incorporating both endurance and resistance training into an exercise regime is termed concurrent training. While there is evidence that concurrent training can attenuate resistance training-induced improvements in maximal strength and muscle hypertrophy, research findings are often equivocal, with some suggesting short-term concurrent training may instead further enhance muscle hypertrophy versus resistance training alone. These observations have questioned the validity of the purported 'interference effect' on muscle hypertrophy with concurrent versus single-mode resistance training...
November 10, 2017: Sports Medicine
https://www.readbyqxmd.com/read/29127356/a-transcriptomic-study-of-myogenic-differentiation-under-the-overexpression-of-ppar%C3%AE-by-rna-seq
#17
Kan He, Guoying Wu, Wen-Xing Li, Daogang Guan, Wenwen Lv, Mengting Gong, Shoudong Ye, Aiping Lu
To study the cellular and molecular function of peroxisome proliferator-activated receptor γ (PPARγ) in skeletal muscle differentiation, we have generated inducible gain-of-function to overexpress PPARγ in C2C12 myoblasts. In order to identify PPARγ targets, RNA sequencing (RNA-seq) was used to evaluate and quantify the transcriptomes and expression patterns during myogenic differentiation under the overexpression of PPARγ. The formation of myotubes and the expression of muscle-specific myogenic genes such as MyoD and MyoG may be inhibited by PPARγ overexpression...
November 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29127112/reduced-expression-of-glutathione-s-transferase-%C3%AE-4-promotes-vascular-neointimal-hyperplasia-in-ckd
#18
Jinlong Luo, Guang Chen, Ming Liang, Aini Xie, Qingtian Li, Qunying Guo, Rajendra Sharma, Jizhong Cheng
Neointima formation is the leading cause of arteriovenous fistula (AVF) failure. We have shown that CKD accelerates this process by transforming the vascular smooth muscle cells (SMCs) lining the AVF from a contractile to the synthetic phenotype. However, the underlying mechanisms affecting this transformation are not clear. Previous studies have shown that the α-class glutathione transferase isozymes have an important role in regulating 4-hydroxynonenal (4-HNE)-mediated proliferative signaling of cells. Here, using both the loss- and gain-of-function approaches, we investigated the role of glutathione S-transferase α4 (GSTA4) in modulating cellular 4-HNE levels for the transformation and proliferation of SMCs...
November 10, 2017: Journal of the American Society of Nephrology: JASN
https://www.readbyqxmd.com/read/29126270/neural-plasticity-with-age-unilateral-maximal-strength-training-augments-efferent-neural-drive-to-the-contralateral-limb-in-older-adults
#19
Tiril Tøien, Runar Unhjem, Thomas Storehaug Øren, Ann Charlotte Gjertsen Kvellestad, Jan Hoff, Eivind Wang
Efferent neural drive during strong muscle contractions is attenuated with age, even after lifelong strength training. However, it is unknown if this deterioration may impede contralateral neural plasticity, and limit the clinical value of unilateral strength training. We assessed muscle force-generating capacity, evoked potentials recordings (V-wave and H-reflex normalized to M-wave; V/M-ratio and H/M-ratio) and voluntary activation (VA) in the plantar flexors of the contralateral limb following unilateral maximal strength training (MST) with the dominant limb for three weeks (9 sessions)...
November 4, 2017: Journals of Gerontology. Series A, Biological Sciences and Medical Sciences
https://www.readbyqxmd.com/read/29125226/loperamide-cardiotoxicity-a-brief-review
#20
REVIEW
Tamer Akel, Soad Bekheit
Loperamide is a popular antidiarrheal medication that has been used for many years. It is currently gaining more attention among healthcare professionals due to its increasing potential for side effects. At present, it is considered safe enough to be sold over the counter. In contrast with other opioid agonists, loperamide is a peripherally acting μ-receptor agonist exerting its effects mainly on the myenteric plexus of the gastrointestinal longitudinal muscle layer. It decreases peristalsis and fluid secretion resulting in longer gastrointestinal transit time...
November 10, 2017: Annals of Noninvasive Electrocardiology
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