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https://www.readbyqxmd.com/read/28445697/influence-of-maturation-on-in-vivo-tissue-to-plasma-partition-coefficients-for-cis-and-trans-permethrin
#1
Manoj Amaraneni, Jing Pang, James V Bruckner, Srinivasa Muralidhara, Tanzir B Mortuza, Darren Gullick, Shirin Hooshfar, Catherine A White, Brian S Cummings
Permethrin, the most widely used household insecticide in the U.S., is marketed as a mixture of its cis (CIS) and trans (TRANS) isomers. The major objective of this investigation was to develop and utilize a reliable approach to determine in vivo partition coefficients (PCs) for CIS and TRANS in immature and adult Sprague-Dawley rats. Adult, postnatal day (PND) 21 and PND 15 rats were infused with environmentally relevant concentrations of CIS or TRANS via a s.c. osmotic pump for 48 or 72 h. The adult and PND 21 rats also received an oral loading dose...
April 23, 2017: Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28445477/mitochondrial-respiration-in-highly-aerobic-canines-in-the-non-raced-state-and-after-a-1600-km-sled-dog-race
#2
Benjamin Miller, Karyn Hamilton, Robert Boushel, Katherine Williamson, Verena Laner, Erich Gnaiger, Michael Davis
At the annual Iditarod Race, Alaskan Huskies repeatedly run for up to 8 hours at 16 km/h to complete 1600 km. We previously demonstrated high rates of mitochondrial protein synthesis in Alaskan Huskies, which we suspected allowed rapid remodeling of mitochondrial proteins in response to energetic stress. The purpose of this study was to examine mitochondrial respiration in permeabilized skeletal muscle fibers of Alaskan Huskies in the offseason (Non-raced) and following the 1600 km Iditarod Sled Dog Race (Raced)...
2017: PloS One
https://www.readbyqxmd.com/read/28445472/unsuspected-osteochondroma-like-outgrowths-in-the-cranial-base-of-hereditary-multiple-exostoses-patients-and-modeling-and-treatment-with-a-bmp-antagonist-in-mice
#3
Sayantani Sinha, Christina Mundy, Till Bechtold, Federica Sgariglia, Mazen M Ibrahim, Paul C Billings, Kristen Carroll, Eiki Koyama, Kevin B Jones, Maurizio Pacifici
Hereditary Multiple Exostoses (HME) is a rare pediatric disorder caused by loss-of-function mutations in the genes encoding the heparan sulfate (HS)-synthesizing enzymes EXT1 or EXT2. HME is characterized by formation of cartilaginous outgrowths-called osteochondromas- next to the growth plates of many axial and appendicular skeletal elements. Surprisingly, it is not known whether such tumors also form in endochondral elements of the craniofacial skeleton. Here, we carried out a retrospective analysis of cervical spine MRI and CT scans from 50 consecutive HME patients that included cranial skeletal images...
April 26, 2017: PLoS Genetics
https://www.readbyqxmd.com/read/28445231/the-effects-of-multi-day-vs-single-pre-exercise-nitrate-supplement-dosing-on-simulated-cycling-time-trial-performance-and-skeletal-muscle-oxygenation
#4
Edward Jo, Michelle Fischer, Alexandra T Auslander, Alan Beigarten, Bruce Daggy, Ken Hansen, Lisa Kessler, Adam Osmond, Hong Wang, Rachel Wes
A transient augmentation in the metabolic efficiency of skeletal muscle is the purported basis for dietary nitrate supplementation amongst competitive and recreational athletes alike. Previous studies support the ergogenic effects of nitrate supplementation as findings indicated improved microvascular blood flow, exercise economy, and performance with relatively short-term supplementation. As with most ergogenic aids, the optimum duration of supplementation prior to performance or competition, i.e. loading phase, is a critical determinant for efficacy...
April 18, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28445030/synthesis-of-aminofuran-linked-benzimidazoles-and-cyanopyrrole-fused-benzimidazoles-by-condition-based-skeletal-divergence
#5
Wei-Shun Hsu, Min-Huan Tsai, Indrajeet J Barve, Gorakh S Yellol, Chung-Ming Sun
A condition-based skeletal divergent synthesis was explored to achieve skeletal diversity in two component condensation reaction. Cyanomethyl benzimidazole was reacted with α-bromoketone under thermal conditions to furnish 2-aminofuranyl-benzimidazoles while the same reaction afforded 3-cyano-benzopyrrolo-imidazoles under microwave irradiation. Two non-equivalent nucleophilic centers on benzimidazole moiety were manipulated elegantly by different reaction conditions to achieve the skeletal diversity.
April 26, 2017: ACS Combinatorial Science
https://www.readbyqxmd.com/read/28444756/e7-1057%C3%AE-ta-mutation-of-the-acidic-%C3%AE-glucosidase-gene-causes-pompe-s-disease-in-droughtmaster-cattle
#6
R E Lyons, D J Johnston, M R McGowan, A Laing, B Robinson, H Owen, B D Hill, B M Burns
OBJECTIVE: To determine whether known loss-of-function alleles of the acidic α-glucosidase gene (GAA) are present in the Droughtmaster breed and, if so, whether the clinical signs and pathology of generalised glycogenosis (Pompe's disease) previously reported in other affected cattle are also seen in homozygous Droughtmasters. DESIGN: Existing genomic and other diagnostic tests developed for generalised glycogenosis in cattle were used to test for the presence of the three known loss-of-function alleles of GAA in a herd of Droughtmaster cattle...
May 2017: Australian Veterinary Journal
https://www.readbyqxmd.com/read/28444710/can-we-define-and-characterize-the-aging-lower-urinary-tract-ici-rs-2015
#7
REVIEW
Bahareh Vahabi, Adrian S Wagg, Peter F W M Rosier, Kevin L J Rademakers, Marie-Astrid Denys, Michel Pontari, Thelma Lovick, Francoise A Valentini, Pierre P Nelson, Karl-Erik Andersson, Christopher H Fry
The prevalence of lower urinary tract (LUT) symptoms increases with age but the etiology is unknown. This article aims to identify research directions that clarify the basis of this association. The initial question is whether biological age is the variable of interest or a time-dependent accumulation of factors that impact on LUT function at rates that differ between individuals. In particular, the accumulation of conditions or agents due to inflammatory states or tissue ischemia is important. Much of the above has been concerned with changes to bladder function and morphology...
April 2017: Neurourology and Urodynamics
https://www.readbyqxmd.com/read/28444677/-deformity-correction-in-skeletally-immature-patients-therapy
#8
Madeleine Willegger, Alexander Kolb, Catharina Chiari
No abstract text is available yet for this article.
April 2017: Zeitschrift Für Orthopädie und Unfallchirurgie
https://www.readbyqxmd.com/read/28444662/early-mitochondrial-adaptations-in-skeletal-muscle-to-obesity-and-obesity-resistance-differentially-regulated-by-high-fat-diet
#9
Jingyu Sun, Tao Huang, Zhengtang Qi, Songhui You, Jingmei Dong, Chen Zhang, Lili Qin, Yunhe Zhou, Shuzhe Ding
The mechanism for different susceptibilities to obesity after short-term high-fat diet (HFD) feeding is largely unknown. Given the close association between obesity occurrence and mitochondrial dysfunction, the early events in skeletal muscle mitochondrial adaptations between HFD-induced obesity (DIO) and HFD-induced obesity resistant (DIO-R) lean phenotype under excess nutritional environment were explored.ICR/JCL male mice were randomly divided into 2 groups, as follows: low-fat diet (LFD) and HFD groups...
April 25, 2017: Experimental and Clinical Endocrinology & Diabetes
https://www.readbyqxmd.com/read/28444456/free-leucine-supplementation-during-an-8-week-resistance-training-program-does-not-increase-muscle-mass-and-strength-in-untrained-young-adult-subjects
#10
Andreo Fernando Aguiar, Alan Pablo Grala, Rubens Alexandre da Silva, Lúcio Flávio Soares-Caldeira, Francis Lopes Pacagnelli, Alex Silva Ribeiro, Douglas Kratki da Silva, Walquíria Batista de Andrade, Mario Carlos Welin Balvedi
The purpose of this study was to examine the effects of free leucine supplementation on changes in skeletal muscle mass and strength during a resistance training (RT) program in previously untrained, young subjects. In a double-blind, randomized, placebo-controlled study, 20 healthy young (22 ± 2 years) participants were assigned to two groups: a placebo-supplement group (PLA, N = 10) or a leucine-supplement group (LEU, N = 10). Both groups underwent an 8-week hypertrophic RT program (2 days/week), consuming an equivalent amount of leucine (3...
April 25, 2017: Amino Acids
https://www.readbyqxmd.com/read/28444416/control-of-dna-integrity-in-skeletal-muscle-under-physiological-and-pathological-conditions
#11
REVIEW
Yara Bou Saada, Vlada Zakharova, Boris Chernyak, Carla Dib, Gilles Carnac, Svetlana Dokudovskaya, Yegor S Vassetzky
Skeletal muscle is a highly oxygen-consuming tissue that ensures body support and movement, as well as nutrient and temperature regulation. DNA damage induced by reactive oxygen species is present in muscles and tends to accumulate with age. Here, we present a summary of data obtained on DNA damage and its implication in muscle homeostasis, myogenic differentiation and neuromuscular disorders. Controlled and transient DNA damage appears to be essential for muscular homeostasis and differentiation while uncontrolled and chronic DNA damage negatively affects muscle health...
April 25, 2017: Cellular and Molecular Life Sciences: CMLS
https://www.readbyqxmd.com/read/28444130/clinically-relevant-cut-off-points-for-the-diagnosis-of-sarcopenia-in-older-korean-people
#12
Yu-Ri Choe, Ju-Youn Joh, Yeon-Pyo Kim
Background: The optimal criteria applied to older Korean people have not been defined. We aimed to define clinically relevant cut-off points for older Korean people and to compare the predictive validity with other definitions of sarcopenia. Methods: Nine hundred and sixteen older Koreans (≥65 years) were included in this cross-sectional observational study. We used conditional inference tree analysis to determine cut-off points for height-adjusted grip strength (GS) and appendicular skeletal muscle mass (ASM), for use in the diagnosis of sarcopenia...
April 21, 2017: Journals of Gerontology. Series A, Biological Sciences and Medical Sciences
https://www.readbyqxmd.com/read/28443253/bone-modeling-remodeling-and-skeletal-health-in-children-and-adolescents-mineral-accrual-assessment-and-treatment
#13
REVIEW
Chiara Maggioli, Stefano Stagi
The modeling and remodeling process of the bone is fundamental to maintaining its integrity and mechanical properties. Many physical and biochemical factors during childhood and adolescence are crucially important for the development of healthy bones. Systemic conditions, such as hormonal status, nutrition, physical inactivity, or many pharmacological treatments, as well as a local variation in the load, can influence bone turnover and, consequently, the attainment of a proper peak bone mass. However, many diseases affecting children and adolescents can be associated with a reduction in bone accrual or a loss of bone mass and quality, which leads to an increased risk of fracture over one's life...
March 2017: Annals of Pediatric Endocrinology & Metabolism
https://www.readbyqxmd.com/read/28443020/bgp-15-protects-against-oxaliplatin-induced-skeletal-myopathy-and-mitochondrial-reactive-oxygen-species-production-in-mice
#14
James C Sorensen, Aaron C Petersen, Cara A Timpani, Dean G Campelj, Jordan Cook, Adam J Trewin, Vanesa Stojanovska, Mathew Stewart, Alan Hayes, Emma Rybalka
Chemotherapy is a leading intervention against cancer. Albeit highly effective, chemotherapy has a multitude of deleterious side-effects including skeletal muscle wasting and fatigue, which considerably reduces patient quality of life and survivability. As such, a defense against chemotherapy-induced skeletal muscle dysfunction is required. Here we investigate the effects of oxaliplatin (OXA) treatment in mice on the skeletal muscle and mitochondria, and the capacity for the Poly ADP-ribose polymerase (PARP) inhibitor, BGP-15, to ameliorate any pathological side-effects induced by OXA...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/28442913/fracture-risk-in-patients-with-type-2-diabetes-mellitus-and-possible-risk-factors-a-systematic-review-and-meta-analysis
#15
REVIEW
Ardeshir Moayeri, Mahmoud Mohamadpour, Seyedeh Fatemeh Mousavi, Ehsan Shirzadpour, Safoura Mohamadpour, Mansour Amraei
AIM: Patients with type 2 diabetes mellitus (T2DM) have an increased risk of bone fractures. A variable increase in fracture risk has been reported depending on skeletal site, diabetes duration, study design, insulin use, and so on. The present meta-analysis aimed to investigate the association between T2DM with fracture risk and possible risk factors. METHODS: Different databases including PubMed, Institute for Scientific Information, and Scopus were searched up to May 2016...
2017: Therapeutics and Clinical Risk Management
https://www.readbyqxmd.com/read/28442507/protein-kinase-stk25-aggravates-the-severity-of-non-alcoholic-fatty-pancreas-disease-in-mice
#16
Esther Nunez Duran, Belen Chanclon, Silva Sütt, Joana Real, Hanns-Ulrich Marschall, Ingrid Wernstedt-Asterholm, Emelie Cansby, Margit Mahlapuu
Characterising the molecular networks that negatively regulate pancreatic β-cell function is essential for understanding the underlying pathogenesis and developing new treatment strategies for type 2 diabetes. We recently identified serine/threonine protein kinase 25 (STK25) as a critical regulator of ectopic fat storage, meta-inflammation, and fibrosis in liver and skeletal muscle. Here, we assessed the role of STK25 in control of progression of non-alcoholic fatty pancreas disease in the context of chronic exposure to dietary lipids in mice...
April 25, 2017: Journal of Endocrinology
https://www.readbyqxmd.com/read/28442482/a-bag3-coding-variant-in-mice-determines-susceptibility-to-ischemic-limb-muscle-myopathy-by-directing-autophagy
#17
Joseph M McClung, Timothy J McCord, Terence E Ryan, Cameron A Schmidt, Thomas D Green, Kevin W Southerland, Jessica L Reinardy, Sarah B Mueller, Talaignair N Venkatraman, Christopher D Lascola, Sehoon Keum, Douglas A Marchuk, Espen E Spangenburg, Ayotunde O Dokun, Brian H Annex, Christopher D Kontos
Background -Critical limb ischemia (CLI) is a manifestation of peripheral artery disease (PAD) that carries significant mortality and morbidity risk in humans, although its genetic determinants remain largely unknown. We previously discovered two overlapping quantitative trait loci (QTL) in mice, Lsq-1 and Civq-1, that affected limb muscle survival and stroke volume following femoral artery or middle cerebral artery ligation, respectively. Here we report that a Bag3 variant (Ile81Met) segregates with tissue protection from hindlimb ischemia (HLI)...
April 25, 2017: Circulation
https://www.readbyqxmd.com/read/28442323/the-ace-2-ang1-7-mas-cascade-enhances-bone-structure-and-metabolism-following-angiotensin-ii-type-1-receptor-blockade
#18
Hatem M Abuohashish, Mohammed M Ahmed, Dina Sabry, Mahmoud M Khattab, Salim S Al-Rejaie
The renin angiotensin system (RAS) regulates numerous systemic functions and is expressed locally in skeletal tissues. Angiotensin1-7 (Ang1-7) is a beneficial member of the RAS, and the therapeutic effects of a large number of angiotensin receptors blockers (ARBs) are mediated by an Ang1-7-dependent cascade. This study examines whether the reported osteo-preservative effects of losartan are mediated through the angiotensin converting enzyme2 (ACE-2)/Ang1-7/Mas pathway in ovariectomized (OVX) rats. Sham and OVX animals received losartan (10mg/kg/d p...
April 22, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/28441765/distinct-fiber-type-signature-in-mouse-muscles-expressing-a-mutant-lamin-a-responsible-for-congenital-muscular-dystrophy-in-a-patient
#19
Alice Barateau, Nathalie Vadrot, Onnik Agbulut, Patrick Vicart, Sabrina Batonnet-Pichon, Brigitte Buendia
Specific mutations in LMNA, which encodes nuclear intermediate filament proteins lamins A/C, affect skeletal muscle tissues. Early-onset LMNA myopathies reveal different alterations of muscle fibers, including fiber type disproportion or prominent dystrophic and/or inflammatory changes. Recently, we identified the p.R388P LMNA mutation as responsible for congenital muscular dystrophy (L-CMD) and lipodystrophy. Here, we asked whether viral-mediated expression of mutant lamin A in murine skeletal muscles would be a pertinent model to reveal specific muscle alterations...
April 24, 2017: Cells
https://www.readbyqxmd.com/read/28441626/myobolites-muscle-derived-metabolites-with-paracrine-and-systemic-effects
#20
REVIEW
Ayon Ibrahim, Michael Neinast, Zoltan P Arany
Intracellular metabolism in skeletal muscle has been studied for more than a century and is the stuff of textbooks. In contrast, the extracellular secretion of metabolites by muscle cells, and their effects on non-muscle cells near or far, has been investigated much less extensively. Here, we describe a number of cases in which striated muscle secretes a metabolite that elicits complex responses in other cells or tissues, with involvements in normal physiology as well as obesity, type II diabetes, and cardiac remodeling...
April 22, 2017: Current Opinion in Pharmacology
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