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https://www.readbyqxmd.com/read/28807824/flavan-3-ol-delays-the-progression-of-disuse-atrophy-induced-by-hindlimb-suspension-in-mice
#1
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/28806499/hibernating-little-pocket-mice-show-few-seasonal-changes-in-bone-properties
#2
Noellyn Pineda, Marjorie Owen, Claire Tucker, Sam Wojda, Stanley Kitchen, Hal Black, Seth Donahue
Periods of disuse or physical inactivity increase bone porosity and decrease bone mineral density, resulting in a loss of bone mechanical competence in many animals. Although large hibernators like bears and marmots prevent bone loss during hibernation, despite long periods of physical inactivity, some small hibernators do lose bone during hibernation. Little pocket mice (Perognathus longimembris) remain underground during winter hibernation and undergo bouts of torpor and interbout arousals, but the torpor bout duration is shorter than other rodent hibernators...
August 14, 2017: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
https://www.readbyqxmd.com/read/28804474/a-longitudinal-electromyography-study-of-complex-movements-in-poststroke-therapy-1-heterogeneous-changes-despite-consistent-improvements-in-clinical-assessments
#3
Negin Hesam-Shariati, Terry Trinh, Angelica G Thompson-Butel, Christine T Shiner, Penelope A McNulty
Poststroke weakness on the more-affected side may arise from reduced corticospinal drive, disuse muscle atrophy, spasticity, and abnormal coordination. This study investigated changes in muscle activation patterns to understand therapy-induced improvements in motor-function in chronic stroke compared to clinical assessments and to identify the effect of motor-function level on muscle activation changes. Electromyography (EMG) was recorded from five upper limb muscles on the more-affected side of 24 patients during early and late therapy sessions of an intensive 14-day program of Wii-based Movement Therapy (WMT) and for a subset of 13 patients at 6-month follow-up...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28803155/assisted-phytoremediation-of-a-multi-contaminated-soil-investigation-on-arsenic-and-lead-combined-mobilization-and-removal
#4
Meri Barbafieri, Francesca Pedron, Gianniantonio Petruzzelli, Irene Rosellini, Elisabetta Franchi, Roberto Bagatin, Marco Vocciante
The removal of contaminants from an earthy matrix by phytoremediation requires the selection of appropriate plant species and a suitable strategy to be effective. In order to set up an assisted phytoremediation intervention related to a disused industrial site affected by an arsenic and lead complex contamination, an extensive experimental investigation on micro and mesocosm scale has been conducted. Particular attention was given to the choice of plant species: using crop plants (Lupinus albus, Helianthus annuus and Brassica juncea) a series of parallel test campaigns have been realized to investigate different scenarios for the reclamation...
August 10, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28803135/effects-of-aging-on-basement-membrane-of-the-soleus-muscle-during-recovery-following-disuse-atrophy-in-rats
#5
Yuji Kanazawa, Keisuke Ikegami, Mitsugu Sujino, Satoshi Koinuma, Mamoru Nagano, Yuki Oi, Tomoya Onishi, Shinichi Sugiyo, Isao Takeda, Hiroshi Kaji, Yasufumi Shigeyoshi
Aging is known to lead to the impaired recovery of muscle after disuse as well as the increased susceptibility of the muscle to damage. Here, we show that, in the older rats, reloading after disuse atrophy, causes the damage of the muscle fibers and the basement membrane (BM) that structurally support the muscle fibers. Male Wistar rats of 3-(young) and 20-(older) months of age were subjected to hindlimb-unloading for 2weeks followed by reloading for a week. In the older rats, the soleus muscles showed necrosis and central nuclei fiber indicating the regeneration of muscle fibers...
August 9, 2017: Experimental Gerontology
https://www.readbyqxmd.com/read/28802414/management-of-resistant-distal-femur-non-unions-with-allograft-strut-and-autografts-combined-with-osteosynthesis-in-a-series-of-22-patients
#6
Raja Bhaskara Kanakeshwar, Dheenadhayalan Jayaramaraju, Devendra Agraharam, Shanmuganathan Rajasekaran
INTRODUCTION AND PURPOSE: Challenges to the surgeon in managing cases of resistant non-union of the distal femur include poor bone stock, disuse osteopenia and joint contractures. Procedures varying from simple bone grafting to megaprosthesis revision have been described. We successfully managed such cases using our technique of combining cortical allograft struts to augment the defect in the femoral condyle coupled with autogenous iliac crest bone grafting and locking plate osteosynthesis...
August 2017: Injury
https://www.readbyqxmd.com/read/28795971/altered-satellite-cell-dynamics-accompany-skeletal-muscle-atrophy-during-chronic-illness-disuse-and-aging
#7
Colleen F McKenna, Christopher S Fry
PURPOSE OF REVIEW: This review explores recent research investigating the contribution of satellite cells (skeletal muscle stem cells) during muscle fiber atrophy as seen in periods of disuse, illness, and aging. RECENT FINDINGS: Studies indicate reduced satellite cell activity and density in a variety of acute and chronic conditions characterized by robust muscle wasting. The direct contribution of satellite cells to unloading/denervation and chronic illness-induced atrophy remains controversial...
August 8, 2017: Current Opinion in Clinical Nutrition and Metabolic Care
https://www.readbyqxmd.com/read/28791231/medium-term-efficacy-of-the-prostatic-urethral-lift
#8
REVIEW
Peter Chin, Peter Robertson
Treatment options for patients with benign prostatic hyperplasia have traditionally revolved around pharmacotherapy or invasive surgery, both of which can negatively impact quality of life (QoL). The quest for a suitable minimally invasive surgical therapy as an alternative to long-term medication or conventional surgery, has seen the development of heat-based therapies, most of which have been dismissed because of post-operative complications and unacceptable re-treatment rates. During the late 1980s and 1990s, mechanical approaches such as transurethral balloon dilation and prostatic urethral stenting were investigated; however, re-treatment rates, encrustation and unacceptable migration rate of stents saw these options fall into disuse...
July 2017: Translational Andrology and Urology
https://www.readbyqxmd.com/read/28775067/running-training-experience-attenuates-disuse-atrophy-in-fast-twitch-skeletal-muscles-of-rats
#9
Keisuke Nakamura, Ikumi Ohsawa, Ryo Masuzawa, Ryotaro Konno, Atsuya Watanabe, Fuminori Kawano
Responsiveness to physiological stimuli, such as exercise and muscular inactivation, differs in individuals. However, the mechanisms responsible for these individual differences remain poorly understood. We tested whether a prior experience of exercise training affects the responses of skeletal muscles to unloading. Young rats were assigned to perform daily running training using a treadmill for 8 weeks. After an additional 8 weeks of normal habitation, the rats were hindlimb unloaded by tail suspension for 1 week...
August 3, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/28762345/assessment-of-dental-caries-and-periodontal-status-in-institutionalized-hearing-impaired-children-in-khordha-district-of-odisha
#10
Avinash Jnaneswar, Goutham Bala Subramaniya, Jayashree Pathi, Kunal Jha, Vinay Suresan, Gunjan Kumar
INTRODUCTION: Over 5% of the world's population has disabling hearing loss. The oral health of the disabled may be disused for the reason of the disabling condition, a challenging disease or the limited access to oral health care. OBJECTIVES: The objectives of the study were to assess the prevalence of dental caries and periodontal status of institutionalized hearing impaired (HI) children in Khordha district of Odisha. MATERIALS AND METHODS: A descriptive cross-sectional study on the HI children was conducted in Khordha district, Odisha...
July 2017: Journal of the Indian Society of Pedodontics and Preventive Dentistry
https://www.readbyqxmd.com/read/28762056/functional-brain-effects-of-hand-disuse-in-patients-with-trapeziometacarpal-joint-osteoarthritis-executed-and-imagined-movements
#11
Martina Gandola, Maurilio Bruno, Laura Zapparoli, Gianluca Saetta, Elena Rolandi, Antonio De Santis, Giuseppe Banfi, Alberto Zerbi, Valerio Sansone, Eraldo Paulesu
The human trapeziometacarpal (TMC) joint has a crucial evolutionary importance as it permits rotation and opposition of the thumb to the other fingers. In chronic TMC joint osteoarthritis (i.e., rhizarthrosis), this motor ability, essential for pinching, grasping, and manipulating objects, may become difficult or impossible due to intolerable pain. Here, we assess whether patients with rhizarthrosis show signs of abnormal brain representation of hand movements. To this end, we studied 35 patients with rhizarthrosis, affecting predominantly one of the two hands, and 35 healthy subjects who underwent both behavioural and fMRI measures of brain activity during overtly executed or imagined thumb-to-finger-opposition movements...
July 31, 2017: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/28757440/nitric-oxide-synthase-inhibition-impairs-muscle-regrowth-following-immobilization
#12
Andreo Fernando Aguiar, Ivan José Vechetti-Júnior, Rodrigo Wagner Souza, Warlen Pereira Piedade, Francis Lopes Pacagnelli, André Soares Leopoldo, Juliano Casonatto, Maeli Dal-Pai-Silva
Nitric oxide (NO) has been shown to increase skeletal muscle protein synthesis. However, the role of NO during skeletal muscle regrowth after immobilization remains unknown. The purpose of this study was to determine whether NO is required for muscle regrowth/recovery after a period of disuse by immobilization. Male Wistar rats were divided into 4 groups: recovered, 1-(2-trifluoromethyl-phenyl)-imidazole (TRIM; 10 mg·kg body mass(-1)·day(-1)), N(G)-nitro-l-arginine methyl ester (l-NAME; 90 mg·kg body mass(-1)·day(-1)), and control...
July 28, 2017: Nitric Oxide: Biology and Chemistry
https://www.readbyqxmd.com/read/28747593/feeding-support-team-for-frail-disabled-or-elderly-people-during-the-early-phase-of-a-disaster
#13
Keisuke Maeda, Hiroshi Shamoto, Satoshi Furuya
Japan was struck by two catastrophic disasters on March 11, 2011 and on April 16, 2016. The former was the Great East Japan Earthquake (M9.0) and the latter was the Kumamoto Earthquake (M7.0). Most inhabitants in the affected areas of both disasters were forced to live in evacuation centers right after the earthquake. Poor oral hygiene, inactivity, malnourishment, appetite loss, eating problems, and swallowing problems due to lack of support for frail, disabled, or elderly evacuees occur during the early phases after a disaster...
August 2017: Tohoku Journal of Experimental Medicine
https://www.readbyqxmd.com/read/28733995/incidence-predictors-and-clinical-outcomes-of-early-stent-thrombosis-in-acute-myocardial-infarction-patients-treated-with-primary-percutaneous-coronary-angioplasty-insights-from-the-university-of-ottawa-heart-institute-stemi-registry
#14
Kuljit Singh, Mohammed Rashid, Derek Y So, Christopher A Glover, Michael Froeschl, Benjamin Hibbert, Aun-Yeong Chong, Alexander Dick, Marino Labinaz, Michel Le May
BACKGROUND: Early stent thrombosis (ST) remains an important complication of primary percutaneous intervention (PCI). To date, our information on angiographic and clinical predictors of early ST in ST-segment elevation myocardial infarction (STEMI) patients treated with primary PCI is limited. METHODS: We tried to evaluate the incidence, predictors, and outcomes of early ST in real-world patients treated with primary PCI. We identified all the patients presenting with STEMI between June 2004 and January 2011 who underwent primary PCI as the primary mode of revascularization...
July 22, 2017: Catheterization and Cardiovascular Interventions
https://www.readbyqxmd.com/read/28724781/muscle-disuse-caused-by-botulinum-toxin-injection-leads-to-increased-central-gain-of-the-stretch-reflex-in-the-rat
#15
Jessica Pingel, Hans Hultborn, Lui Naslund-Koch, Dennis Bo Jensen, Jacob Wienecke, Jens Bo Nielsen
Botulinum toxin (Btx) is used in children with cerebral palsy and other neurological patients to diminish spasticity and reduce the risk of development of contractures. Here, we investigated changes in the central gain of the stretch reflex circuitry in response to botulinum toxin injection in the triceps surae muscle in rats. Experiments were performed in 21 rats. 8 rats were in a control group and 13 rats were injected with 6 IU of Btx in the left triceps surae muscle. Two weeks after Btx injection larger monosynaptic reflexes (MSR) were recorded from the left (injected) than the right (non-injected) L4 + L5 ventral roots following stimulation of the corresponding dorsal roots...
July 19, 2017: Journal of Neurophysiology
https://www.readbyqxmd.com/read/28720001/differential-effects-of-heat-stress-on-fibre-capillarisation-in-tenotomised-soleus-and-plantaris-muscles
#16
Muthita Hirunsai, Ratchakrit Srikuea
PURPOSE: Capillary regression is commonly observed in response to disuse muscle atrophy. Heat stress is known to alleviate muscle atrophy, while effect of heat exposure on capillary adaptation following disuse atrophy is not defined. Here, we examined the effect of heat treatment on capillarisation and the associated signalling in slow-oxidative soleus and fast-glycolytic plantaris muscles following Achilles tendon ablation (tenotomy). MATERIALS AND METHODS: Male Wistar rats were assigned into control (CON), control with heat stress (CON + HEAT), tenotomy (TEN) and tenotomy with heat stress (TEN + HEAT) groups...
July 18, 2017: International Journal of Hyperthermia
https://www.readbyqxmd.com/read/28715424/atrophy-of-gluteus-maximus-among-women-with-a-history-of-chronic-low-back-pain
#17
Amy H Amabile, John H Bolte, Saskia D Richter
BACKGROUND: Although the relationship between low back pain (LBP) and the size of certain trunk muscles has been extensively studied, the relationship between gluteus maximus (GM) size and LBP has been only minimally examined. Determining whether such a relationship exists would help improve our understanding of the etiology of LBP, and possibly provide a rationale for the use of therapeutic exercise interventions targeting GM with LBP patients. The objective of this study was to compare gluteus maximus cross-sectional area in individuals with chronic LBP, and in a group of individuals without LBP...
2017: PloS One
https://www.readbyqxmd.com/read/28707116/rotator-cuff-degeneration-of-the-healthy-shoulder-in-patients-with-unilateral-arm-amputation-is-not-worsened-by-overuse
#18
S Gumina, V Candela, L Mariani, T Venditto, C Catalano, S Castellano, V Santilli, G Giannicola, A Castagna
PURPOSE: In order to evaluate whether overuse has a significant role in rotator cuff tear (RCT) aetiology, we evaluated both shoulders of patients with old unilateral arm amputation expecting a higher rate of RC degeneration in the healthy side. METHODS: Nineteen males and six females (mean age: 57.3 ± 10.1) with an old (>20 years) unilateral arm amputation were submitted to an MRI of both shoulders. Tendon status and muscle tropism were evaluated according to Sugaya and Fuchs classifications, respectively; the acromion humeral distance was measured...
July 13, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28705993/effects-of-%C3%AE-hydroxy-%C3%AE-methylbutyrate-hmb-on-skeletal-muscle-mitochondrial-content-and-dynamics-and-lipids-after-10-days-of-bed-rest-in-older-adults
#19
Robert A Standley, Giovanna Distefano, Suzette L Pereira, Min Tian, Owen J Kelly, Paul M Coen, Nicolaas E P Deutz, Robert R Wolfe, Bret H Goodpaster
Loss of muscle mass during periods of disuse likely has negative health consequences for older adults. We have previously shown that β-hydroxy-β-methylbutyrate (HMB) supplementation during 10 days of strict bed rest (BR) attenuates the loss of lean mass in older adults. To elucidate potential molecular mechanisms of HMB effects on muscle during bed rest and resistance training rehabilitation (RT), we examined mediators of skeletal muscle mitochondrial dynamics, autophagy and atrophy, and intramyocellular lipids...
July 13, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/28671635/osteoprotective-effect-of-radix-scutellariae-in-female-hindlimb-suspended-sprague-dawley-rats-and-the-osteogenic-differentiation-effect-of-its-major-constituent
#20
Guangwei Zhang, Chenrui Li, Yinbo Niu, Qi Yu, Yulong Chen, Enqi Liu
A number of medicinal herbs have demonstrated therapeutic effects for the prevention and treatment of disuse-induced osteoporosis. As a common ingredient in proprietary traditional Chinese medicines, the anti-osteoporosis effects of Radix Scutellariae extract (RSE, 50 mg/kg/day) were evaluated in a hindlimb suspended rat model. Bone mineral density (BMD) was measured by dual-energy X-ray absorptiometry, and the micro-architecture observed by MicroCT assay with bone biomechanical properties evaluated by a three-point bending test...
July 3, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
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