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https://www.readbyqxmd.com/read/28222403/muscular-effects-of-vitamin-d-in-young-athletes-and-non-athletes-and-in-the-elderly
#1
REVIEW
Nikolaos E Koundourakis, Pavlina D Avgoustinaki, Niki Malliaraki, Andrew N Margioris
Muscles are major targets of vitamin D. Exposure of skeletal muscles to vitamin D induces the expression of multiple myogenic transcription factors enhancing muscle cell proliferation and differentiation. At the same time vitamin D suppresses the expression of myostatin, a negative regulator of muscle mass. Moreover, vitamin D increases the number of type II or fast twitch muscle cells and in particular that of type IIA cells, while its deficiency causes type IIA cell atrophy. Furthermore, vitamin D supplementation in young males with low vitamin D levels increases the percentage of type IIA fibers in muscles, causing an increase in muscular high power output...
October 2016: Hormones: International Journal of Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28220585/sleep-duration-is-associated-with-body-fat-and-muscle-mass-and-waist-to-height-ratio-beyond-conventional-obesity-parameters-in-korean-adolescent-boys
#2
Ga Eun Nam, Kyungdo Han, Do Hoon Kim, Jee Hyun Lee, Won Hee Seo
While evidence has supported a strong association between sleep duration and obesity globally, results from studies of children and adolescents have been conflicting, and information about a sex-specific association has been limited. This study aimed to investigate the association of sleep duration with various parameters of obesity among South Korean adolescents. This population-based, cross-sectional study analysed the data obtained from the Korea National Health and Nutrition Examination Surveys (KNHANES) 2009 and 2010...
February 21, 2017: Journal of Sleep Research
https://www.readbyqxmd.com/read/28219586/factors-associated-with-the-development-of-sarcopenia-in-kidney-transplant-recipients
#3
M Yanishi, Y Kimura, H Tsukaguchi, Y Koito, H Taniguchi, T Mishima, Y Fukushima, M Sugi, H Kinoshita, T Matsuda
INTRODUCTION: Sarcopenia is characterized by an involuntary loss of skeletal muscle mass, strength, and function. Previous studies suggest that it is generally associated with aging and chronic kidney diseases. The focus of this study was on the association between sarcopenia and pre-sarcopenia in kidney transplant recipients. METHODS: Fifty-one patients who underwent kidney transplantation at Kansai Medical University Hospital were enrolled, and their sarcopenia status was evaluated between April and July 2016...
March 2017: Transplantation Proceedings
https://www.readbyqxmd.com/read/28217037/lung-injury-induced-skeletal-muscle-wasting-in-aged-mice-is-linked-to-alterations-in-long-chain-fatty-acid-metabolism
#4
D Clark Files, Amro Ilaiwy, Traci L Parry, Kevin W Gibbs, Chun Liu, James R Bain, Osvaldo Delbono, Michael J Muehlbauer, Monte S Willis
INTRODUCTION: Older patients are more likely to acquire and die from acute respiratory distress syndrome (ARDS) and muscle weakness may be more clinically significant in older persons. Recent data implicate muscle ring finger protein 1 (MuRF1) in lung injury-induced skeletal muscle atrophy in young mice and identify an alternative role for MuRF1 in cardiac metabolism regulation through inhibition of fatty acid oxidation. OBJECTIVES: To develop a model of lung injury-induced muscle wasting in old mice and to evaluate the skeletal muscle metabolomic profile of adult and old acute lung injury (ALI) mice...
August 2016: Metabolomics: Official Journal of the Metabolomic Society
https://www.readbyqxmd.com/read/28216276/prediction-of-everolimus-toxicity-and-prognostic-value-of-skeletal-muscle-index-in-patients-with-metastatic-renal-cell-carcinoma
#5
Edouard Auclin, Camille Bourillon, Eleonora De Maio, Marie Agnes By, Sofiane Seddik, Laure Fournier, Marie Auvray, Antoine Dautruche, Yann-Alexandre Vano, Constance Thibault, Florence Joly, Laurent Brunereau, Carlos Gomez-Roca, Christine Chevreau, Reza Elaidi, Stéphane Oudard
BACKGROUND: The objective of the study was to assess the prognostic role of skeletal muscle index (SMI) in metastatic renal cell carcinoma (mRCC) patients treated with everolimus, and its effect of on everolimus-induced toxicity. PATIENTS AND METHODS: Consecutive mRCC patients treated with everolimus between February 2007 and November 2014 underwent computed tomography scans at a single center performed by the same radiologist. SMI was assessed before everolimus treatment using the L3 cross-sectional area...
February 1, 2017: Clinical Genitourinary Cancer
https://www.readbyqxmd.com/read/28215905/apobec2-negatively-regulates-myoblast-differentiation-in-muscle-regeneration
#6
Hideaki Ohtsubo, Yusuke Sato, Takahiro Suzuki, Wataru Mizunoya, Mako Nakamura, Ryuichi Tatsumi, Yoshihide Ikeuchi
Recently we found that the deficiency of APOBEC2, a member of apoB mRNA editing enzyme, catalytic polypeptide-like family, leads to a diminished muscle mass and increased myofiber with centrally-located nuclei known as dystrophic phenotypes. APOBEC2 expression is predominant in skeletal and cardiac muscles and elevated exclusively at the early-differentiation phase of wild-type (WT) myoblast cultures; however the physiological significance is still un-known. Here we show that APOBEC2 is a key negative regulator of myoblast differentiation in muscle regeneration...
February 12, 2017: International Journal of Biochemistry & Cell Biology
https://www.readbyqxmd.com/read/28215411/impact-of-skeletal-muscle-mass-on-long-term-adverse-cardiovascular-outcomes-in-patients-with-chronic-kidney%C3%A2-disease
#7
Kazuhiro Harada, Susumu Suzuki, Hideki Ishii, Toshijiro Aoki, Kenshi Hirayama, Yohei Shibata, Yosuke Negishi, Takuya Sumi, Kazuhiro Kawashima, Ayako Kunimura, Yusaku Shimbo, Yosuke Tatami, Toshiki Kawamiya, Dai Yamamoto, Ryota Morimoto, Yoshinari Yasuda, Toyoaki Murohara
Sarcopenia, defined as skeletal muscle loss and dysfunction, is attracting considerable attention as a novel risk factor for cardiovascular events. Although the loss of skeletal muscle is common in chronic kidney disease (CKD) patients, the relation between sarcopenia and cardiovascular events in CKD patients is not well defined. Therefore, we aimed to investigate the relation between skeletal muscle mass and major adverse cardiovascular events (MACE) in CKD patients. We enrolled 266 asymptomatic CKD patients (median estimated glomerular filtration rate: 36...
January 25, 2017: American Journal of Cardiology
https://www.readbyqxmd.com/read/28214041/why-intensity-is-not-a-bad-word-optimizing-health-status-at-any-age
#8
REVIEW
Gary R Hunter, Eric P Plaisance, Stephen J Carter, Gordon Fisher
Age-related declines in health and function make locomotion increasingly difficult leading to reductions in non-exercise activity thermogenesis (NEAT), skeletal muscle size and strength, and increased adiposity. Exercise is an important strategy to attenuate loss of function through the life cycle. Despite claims to the contrary, high-intensity exercise is important for the prevention of obesity and sarcopenia with advancing age. Therefore, the purpose of this mini-review is to present literature supporting the contention that low volume, high-intensity aerobic and/or resistance training can slow sarcopenia, sustain ease of movement, stimulate NEAT, and attenuate the accretion of fat mass...
February 9, 2017: Clinical Nutrition: Official Journal of the European Society of Parenteral and Enteral Nutrition
https://www.readbyqxmd.com/read/28213864/electrical-stimulation-of-denervated-rat-skeletal-muscle-ameliorates-bone-fragility-and-muscle-loss-in-early-stage-disuse-musculoskeletal-atrophy
#9
Hiroyuki Tamaki, Kengo Yotani, Futoshi Ogita, Keishi Hayao, Kouki Nakagawa, Kazuhiro Sugawara, Hikari Kirimoto, Hideaki Onishi, Norikatsu Kasuga, Noriaki Yamamoto
We tested whether daily muscle electrical stimulation (ES) can ameliorate the decrease in cortical bone strength as well as muscle and bone geometric and material properties in the early stages of disuse musculoskeletal atrophy. 7-week-old male F344 rats were randomly divided into three groups: age-matched control group (Cont); a sciatic denervation group (DN); and a DN + direct electrical stimulation group (DN + ES). Denervated tibialis anterior (TA) muscle in the DN + ES group received ES with 16 mA at 10 Hz for 30 min/day, 6 days/week...
February 17, 2017: Calcified Tissue International
https://www.readbyqxmd.com/read/28213167/the-effect-of-peripheral-neuropathy-on-lower-limb-muscle-strength-in-diabetic-individuals
#10
Jean P Ferreira, Cristina D Sartor, Ângela M O Leal, Isabel C N Sacco, Tatiana O Sato, Ivana L Ribeiro, Alice S Soares, Jonathan E Cunha, Tania F Salvini
BACKGROUND: Skeletal muscle strength is poorly described and understood in diabetic participants with diabetic peripheral neuropathy. This study aimed to investigate the extensor and flexor torque of the knee and ankle during concentric, eccentric, and isometric contractions in men with diabetes mellitus type 2 with and without diabetic peripheral neuropathy. METHODS: Three groups of adult men (n=92), similar in age, body mass index, and testosterone levels, were analyzed: 33 non-diabetic controls, 31 with type 2 diabetes mellitus, and 28 with diabetic peripheral neuropathy...
February 9, 2017: Clinical Biomechanics
https://www.readbyqxmd.com/read/28207424/skeletal-muscle-wasting-new-role-of-nonclassical-renin-angiotensin-system
#11
Claudio Cabello-Verrugio, Juan C Rivera, Dominga Garcia
PURPOSE OF REVIEW: Skeletal muscle can be affected by many physiological and pathological conditions that contribute to the development of muscle weakness, including skeletal muscle loss, inflammatory processes, or fibrosis. Therefore, research into therapeutic treatment alternatives or alleviation of these effects on skeletal muscle is of great importance. RECENT FINDINGS: Recent studies have shown that angiotensin (1-7) [Ang-(1-7)] - a vasoactive peptide of the nonclassical axis in the renin-angiotensin system (RAS) - and its Mas receptor are expressed in skeletal muscle...
February 16, 2017: Current Opinion in Clinical Nutrition and Metabolic Care
https://www.readbyqxmd.com/read/28205203/effects-of-different-types-of-exercise-on-body-composition-muscle-strength-and-igf-1-in-the-elderly-with-sarcopenic-obesity
#12
Hung-Ting Chen, Yu-Chun Chung, Yu-Jen Chen, Sung-Yen Ho, Huey-June Wu
OBJECTIVES: To investigate the influence of resistance training (RT), aerobic training (AT), or combination training (CT) interventions on the body composition, muscle strength performance, and insulin-like growth factor 1 (IGF-1) of patients with sarcopenic obesity. DESIGN: Randomized controlled trial. SETTING: Community center and research center. PARTICIPANTS: Sixty men and women aged 65-75 with sarcopenic obesity...
February 15, 2017: Journal of the American Geriatrics Society
https://www.readbyqxmd.com/read/28202349/muscle-ultrasound-and-sarcopenia-in-older-individuals-a-clinical-perspective
#13
REVIEW
Andrea Ticinesi, Tiziana Meschi, Marco V Narici, Fulvio Lauretani, Marcello Maggio
INTRODUCTION: A precise quantitative measurement of skeletal muscle mass is fundamental for diagnosing sarcopenia in older individuals. The current techniques of assessment, including dual-energy x-ray absorptiometry (DXA), bioimpedance analysis (BIA), and magnetic resonance imaging (MRI) are either difficult to perform in everyday clinical practice or biased by concurrent clinical confounders. B-mode muscle ultrasound can be helpful in assessing muscle mass and architecture, and thus possibly useful for diagnosing or screening sarcopenia...
February 12, 2017: Journal of the American Medical Directors Association
https://www.readbyqxmd.com/read/28199350/25-hydroxyvitamin-d3-and-1-25-dihydroxyvitamin-d3-exert-distinct-effects-on-human-skeletal-muscle-function-and-gene-expression
#14
Zaki K Hassan-Smith, Carl Jenkinson, David J Smith, Ivan Hernandez, Stuart A Morgan, Nicola J Crabtree, Neil J Gittoes, Brian G Keevil, Paul M Stewart, Martin Hewison
Age-associated decline in muscle function represents a significant public health burden. Vitamin D-deficiency is also prevalent in aging subjects, and has been linked to loss of muscle mass and strength (sarcopenia), but the precise role of specific vitamin D metabolites in determining muscle phenotype and function is still unclear. To address this we quantified serum concentrations of multiple vitamin D metabolites, and assessed the impact of these metabolites on body composition/muscle function parameters, and muscle biopsy gene expression in a retrospective study of a cohort of healthy volunteers...
2017: PloS One
https://www.readbyqxmd.com/read/28198733/clinical-relevance-of-sarcopenia-in-chronic-kidney-disease
#15
Ranjani N Moorthi, Keith G Avin
PURPOSE OF REVIEW: In this article, we review sarcopenia in chronic kidney disease (CKD). We aim to present how definitions of sarcopenia from the general population may pertain to those with CKD, its assessment by clinicians and emerging therapies for sarcopenia in CKD. For this review, we limit our description and recommendations to patients with CKD who are not on dialysis. RECENT FINDINGS: Poorer parameters of lean mass, strength and physical function are associated with worsening patient-centered outcomes such as limiting mobility, falls and mortality in CKD; however, the magnitude of these associations are different in those with and without CKD...
February 13, 2017: Current Opinion in Nephrology and Hypertension
https://www.readbyqxmd.com/read/28198601/the-effect-of-high-speed-strength-training-with-heavy-and-low-workloads-on-neuromuscular-function-and-maximal-concentric-quadriceps-strength
#16
Ali A Mazani, Mohamed R Hamdinia, Amir H Haghigi, Nosratollah Hedayatpour
BACKGROUND: Dynamic strength training has been widely used to increase the ability of skeletal muscle to produce muscle force. Manipulating resistance training program variables has been commonly used as a tool to optimize maximum strength. This study examined the effects of 12 weeks of high-speed strength training with low and heavy workloads on muscle strength and neuromuscular function of quadriceps muscle. METHODS: Thirty male subjects (age, mean ± SD, 20.6 ± 2...
February 14, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28194289/an-interesting-case-of-intramuscular-myxoma-with-scapular-bone-lysis
#17
Jérôme Tirefort, Frank C Kolo, Alexandre Lädermann
Introduction. Intramuscular myxoma is a rare benign primitive tumor of the mesenchyme founded at the skeletal muscle level; it presents itself like an unpainful, slow-growing mass. Myxomas with bone lysis are even more rare; only 7 cases have been reported in the English literature, but never at the shoulder level. Case Presentation. We describe an 83-year-old patient with a growing mass in the deltoid muscle with unique scapular lysis, without any symptom. Magnetic resonance imaging (MRI) and a biopsy were performed and the diagnosis of intramuscular myxoma has been retained...
2017: Case Reports in Orthopedics
https://www.readbyqxmd.com/read/28193782/mitochondrial-mass-and-activity-as-a-function-of-body-composition-in-individuals-with-spinal-cord-injury
#18
Laura C O'Brien, Rodney C Wade, Liron Segal, Qun Chen, Jeannie Savas, Edward J Lesnefsky, Ashraf S Gorgey
Spinal cord injury (SCI) is accompanied by deterioration in body composition and severe muscle atrophy. These changes put individuals at risk for insulin resistance, type II diabetes, and cardiovascular disease. To determine the relationships between skeletal muscle mitochondrial mass, activity, and body composition, 22 men with motor complete SCI were studied. Body composition assessment was performed using dual-energy X-ray absorptiometry and magnetic resonance imaging. Skeletal muscle biopsies were obtained from the vastus lateralis muscle to measure citrate synthase (CS) and complex III (CIII) activity...
February 2017: Physiological Reports
https://www.readbyqxmd.com/read/28193312/leukocyte-and-skeletal-muscle-telomere-length-and-body-composition-in-monozygotic-twin-pairs-discordant-for-long-term-hormone-replacement-therapy
#19
Elina Sillanpää, Paula Niskala, Eija K Laakkonen, Elodie Ponsot, Markku Alén, Jaakko Kaprio, Fawzi Kadi, Vuokko Kovanen, Sarianna Sipilä
Estrogen-based hormone replacement therapy (HRT) may be associated with deceleration of cellular aging. We investigated whether long-term HRT has effects on leukocyte (LTL) or mean and minimum skeletal muscle telomere length (SMTL) in a design that controls for genotype and childhood environment. Associations between telomeres, body composition, and physical performance were also examined. Eleven monozygotic twin pairs (age 57.6 ± 1.8 years) discordant for HRT were studied. Mean duration of HRT use was 7.3 ± 3...
February 14, 2017: Twin Research and Human Genetics: the Official Journal of the International Society for Twin Studies
https://www.readbyqxmd.com/read/28193296/comparison-between-clinical-significance-of-height-adjusted-and-weight-adjusted-appendicular-skeletal-muscle-mass
#20
Taishi Furushima, Motohiko Miyachi, Motoyuki Iemitsu, Haruka Murakami, Hiroshi Kawano, Yuko Gando, Ryoko Kawakami, Kiyoshi Sanada
BACKGROUND: This study aimed to compare relationships between height- or weight-adjusted appendicular skeletal muscle mass (ASM/Ht(2) or ASM/Wt) and risk factors for cardiometabolic diseases or osteoporosis in Japanese men and women. METHODS: Subjects were healthy Japanese men (n = 583) and women (n = 1218). The study population included a young group (310 men and 357 women; age, 18-40 years) and a middle-aged and elderly group (273 men and 861 women; age, ≥41 years)...
February 13, 2017: Journal of Physiological Anthropology
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