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https://www.readbyqxmd.com/read/28735103/voluntary-activation-of-the-trapezius-muscle-in-cases-with-neck-shoulder-pain-compared-to-healthy-controls
#1
Katrine Tholstrup Bech, Camilla Marie Larsen, Gisela Sjøgaard, Andreas Holtermann, Janet L Taylor, Karen Søgaard
Subjects reporting neck/shoulder pain have been shown to generate less force during maximal voluntary isometric contractions (MVC) of the shoulder muscles compared to healthy controls. This has been suggested to be caused by a pain-related decrease in voluntary activation (VA) rather than lack of muscle mass. The aim of the present study was to investigate VA of the trapezius muscle during MVCs in subjects with and without neck/shoulder pain by use of the twitch interpolation technique. Ten cases suffering from pain and ten age and gender matched, healthy controls were included in the study...
July 14, 2017: Journal of Electromyography and Kinesiology
https://www.readbyqxmd.com/read/28734988/can-adverse-effects-of-excessive-vitamin-d-supplementation-occur-without-developing-hypervitaminosis-d
#2
REVIEW
Mohammed S Razzaque
Vitamin D is a fat-soluble hormone that has endocrine, paracrine and autocrine functions. Consumption of vitamin D-supplemented food & drugs have increased significantly in the last couple of decades due to campaign and awareness programs. Despite such wide use of artificial vitamin D supplements, serum levels of 25 hydroxyvitamin D [25(OH)D] does not always reflect the amount of uptake. In contrast to the safe sunlight exposure, prolonged and disproportionate consumption of vitamin D supplements may lead to vitamin D intoxication, even without developing hypervitaminosis D...
July 19, 2017: Journal of Steroid Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/28734966/development-of-new-ganglioside-probes-and-unraveling-of-raft-domain-structure-by-single-molecule-imaging
#3
REVIEW
Kenichi G N Suzuki, Hiromune Ando, Naoko Komura, Takahiro Fujiwara, Makoto Kiso, Akihiro Kusumi
Gangliosides are involved in a variety of biological roles and are a component of lipid rafts found in cell plasma membranes (PMs). Gangliosides are especially abundant in neuronal PMs and are essential to their physiological functions. However, the dynamic behaviors of gangliosides have not been investigated in living cells due to a lack of fluorescent probes that behave like their parental molecules. We have recently developed, using an entirely chemical method, four new ganglioside probes (GM1, GM2, GM3, and GD1b) that act similarly to their parental molecules in terms of raft partitioning and binding affinity...
July 19, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28734777/inhibitor-mechanisms-in-the-s1-binding-site-of-the-dopamine-transporter-defined-by-multi-site-molecular-tethering-of-photoactive-cocaine-analogs
#4
Danielle Krout, Akula Bala Pramod, Rejwi Acharya Dahal, Michael J Tomlinson, Babita Sharma, James D Foster, Mu-Fa Zou, Comfort Boatang, Amy Hauck Newman, John R Lever, Roxanne A Vaughan, L Keith Henry
Dopamine transporter (DAT) blockers like cocaine and many other abused and therapeutic drugs bind and stabilize an inactive form of the transporter inhibiting reuptake of extracellular dopamine (DA). The resulting increases in DA lead to the ability of these drugs to induce psychomotor alterations and addiction, but paradoxical findings in animal models indicate that not all DAT antagonists induce cocaine-like behavioral outcomes. How this occurs is not known, but one possibility is that uptake inhibitors may bind at multiple locations or in different poses to stabilize distinct conformational transporter states associated with differential neurochemical endpoints...
July 19, 2017: Biochemical Pharmacology
https://www.readbyqxmd.com/read/28734716/short-term-clinical-outcome-of-an-anatomic-short-stem-humeral-component-in-total-shoulder-arthroplasty
#5
Anthony A Romeo, Robert J Thorsness, Shelby A Sumner, Reuben Gobezie, Evan S Lederman, Patrick J Denard
BACKGROUND: Short-stem press-fit humeral components have recently been developed in an effort to preserve bone in total shoulder arthroplasty (TSA), but few studies have reported outcomes of these devices. The purpose of this study was to evaluate the short-term clinical outcomes of an anatomic short-stem humeral component in TSA. We hypothesized that the implant would lead to significant functional improvement with low rates of radiographic loosening. METHODS: A multicenter retrospective review was performed of TSAs using an anatomic short-stem humeral component (Apex; Arthrex, Inc...
July 19, 2017: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/28734659/comparative-effectiveness-study-between-negative-pressure-wound-therapy-and-conventional-wound-dressing-on-perforator-flap-at-the-chinese-tertiary-referral-teaching-hospital
#6
Regis Ernest Mendame Ehya, Yong Zhao, Xun Zheng, Wanrong Yi, Guy-Armel Bounda, Zonghuan Li, Weidong Xiao, Aixi Yu
BACKGROUND: Perforator flap techniques with conventional wound dressing have being extensively used in the management of soft-tissue defects. However; the flap's survival rate is not always guaranteed and the wound healing time always long. The aim of this study was to investigate the clinical effectiveness use of a freshly transplanted perforator flap in conjunction with Vacuum-assisted closure (VAC) for better clinical outcomes. METHODS: A prospective, randomized, effectiveness study comparing the clinical outcomes of VAC versus traditional wrap and bandages for the treatment of open wounds that required hospital admission and operative debridement using perforator flaps, was carried out from March 1, 2014 to March 31, 2016 at Wuhan University Zhongnan Hospital...
July 12, 2017: Journal of Tissue Viability
https://www.readbyqxmd.com/read/28734535/transcatheter-arterial-embolization-of-abnormal-vessels-as-a-treatment-for-lateral-epicondylitis-refractory-to-conservative-treatment-a-pilot-study-with-a-2-year-follow-up
#7
Wataru Iwamoto, Yuji Okuno, Noboru Matsumura, Takao Kaneko, Hiroyasu Ikegami
BACKGROUND: Abnormal vessels and accompanying nerves are possible sources of pain with lateral epicondylitis. The purpose of this study was to describe the safety and efficacy of transcatheter arterial embolization (TAE) for lateral epicondylitis resistant to conservative treatment. METHODS: This prospective study was conducted in 24 patients with lateral epicondylitis resistant to conservative treatments for more than 3 months, with a symptom duration longer than 6 months, and with moderate to severe pain who were treated with TAE between March 2013 and October 2014...
August 2017: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/28734362/discrimination-of-bacteria-by-rapid-sensing-their-metabolic-volatiles-using-an-aspiration-type-ion-mobility-spectrometer-a-ims-and-gas-chromatography-mass-spectrometry-gc-ms
#8
Ileana Andreea Ratiu, Victor Bocos-Bintintan, Adrian Patrut, Victor Hugo Moll, Matthew Turner, C L Paul Thomas
The objective of our study was to investigate whether one may quickly and reliably discriminate different microorganism strains by direct monitoring of the headspace atmosphere above their cultures. Headspace samples above a series of in vitro bacterial cultures were directly interrogated using an aspiration type ion mobility spectrometer (a-IMS), which produced distinct profiles ("fingerprints") of ion currents generated simultaneously by the detectors present inside the ion mobility cell. Data processing and analysis using principal component analysis showed net differences in the responses produced by volatiles emitted by various bacterial strains...
August 22, 2017: Analytica Chimica Acta
https://www.readbyqxmd.com/read/28734204/molecular-dynamics-of-conformation-specific-dopamine-transporter-inhibitor-complexes
#9
Bernandie Jean, Christopher K Surratt, Jeffry D Madura
The recreational psychostimulant cocaine inhibits dopamine reuptake from the synapse, resulting in excessive stimulation of postsynaptic dopamine receptors in brain areas associated with reward and addiction. Cocaine binds to and stabilizes the outward- (extracellular-) facing conformation of the dopamine transporter (DAT) protein, while the low abuse potential DAT inhibitor benztropine prefers the inward- (cytoplasmic-) facing conformation. A correlation has been previously postulated between psychostimulant abuse potential and preference for the outward-facing DAT conformation...
July 11, 2017: Journal of Molecular Graphics & Modelling
https://www.readbyqxmd.com/read/28734063/atp-and-astrocytes-play-a-prominent-role-in-the-control-of-the-respiratory-pattern-generator-in-the-lamprey
#10
Elenia Cinelli, Ludovica Iovino, Donatella Mutolo
The role of ATP and astrocytes in respiratory rhythm modulation has been recently investigated in neonatal rodents. However, no information on the role of ATP and astrocytes within the respiratory network of the lamprey is available, particularly within the paratrigeminal respiratory group (pTRG), the proposed respiratory central pattern generator. To address these issues, the present study was carried out on isolated brainstems of the adult lamprey. Bath application of ATP caused marked increases in respiratory frequency followed by decreases in the respiratory motor output, mediated by the ATP metabolite adenosine at the level of the pTRG...
July 22, 2017: Journal of Physiology
https://www.readbyqxmd.com/read/28734024/effect-of-solvent-and-protein-dynamics-in-ligand-recognition-and-inhibition-of-aminoglycoside-adenyltransferase-2%C3%A2-ia
#11
Valjean R Bacot-Davis, Angelia V Bassenden, Tara Sprules, Albert M Berghuis
The aminoglycoside modifying enzyme (AME) ANT(2″)-Ia is a significant target for next generation antibiotic development. Structural studies of a related aminoglycoside-modifying enzyme, ANT(3″)(9), revealed this enzyme contains dynamic, disordered, and well-defined segments that modulate thermodynamically before and after antibiotic binding. Characterizing these structural dynamics is critical for in situ screening, design, and development of contemporary antibiotics that can be implemented in a clinical setting to treat potentially lethal, antibiotic resistant, human infections...
July 21, 2017: Protein Science: a Publication of the Protein Society
https://www.readbyqxmd.com/read/28733977/molecular-classification-of-tumor-cells-in-a-patient-with-intravascular-large-b-cell-lymphoma
#12
W M Bauer, M C Aichelburg, J Griss, C Skrabs, I Simonitsch-Klupp, A I Schiefer, H Kittler, U Jäger, M Zeyda, R Knobler, G Stingl
BACKGROUND: Intravascular large B-cell lymphoma (IVLBCL) is a rare type of extranodal large B-cell lymphoma. It is characterized by the proliferation of tumour cells exclusively intraluminally in small blood vessels of different organs. The clinical manifestation depends on the type of organ affected, additionally, a haemophagocytic syndrome can be observed in some patients. OBJECTIVE: Due to the rarity of this lymphoma and in spite of detailed immunohistochemical investigations the exact nosology of this cancer is only incompletely understood...
July 22, 2017: British Journal of Dermatology
https://www.readbyqxmd.com/read/28733934/draft-genome-sequence-of-the-deep-sea-bacterium-moritella-sp-jt01-and-identification-of-biotechnologically-relevant-genes
#13
Robert Cardoso de Freitas, Estácio Jussie Odisi, Chiaki Kato, Marcus Adonai Castro da Silva, André Oliveira de Souza Lima
Deep-sea bacteria can produce various biotechnologically relevant enzymes due to their adaptations to high pressures and low temperatures. To identify such enzymes, we have sequenced the genome of the polycaprolactone-degrading bacterium Moritella sp. JT01, isolated from sediment samples from Japan Trench (6957 m depth), using a Illumina HiSeq2000 sequencer (12.1 million paired-end reads) and CLC Genomics Workbench (version 6.5.1) for the assembly, resulting in a 4.83-Mb genome (42 scaffolds). The genome was annotated using Rapid Annotation using Subsystem Technology (RAST), Protein Homology/analogY Recognition Engine V 2...
July 22, 2017: Marine Biotechnology
https://www.readbyqxmd.com/read/28733865/checkpoint-kinase-2-is-dispensable-for-regulation-of-the-p53-response-but-is-required-for-g2-m-arrest-and-cell-survival-in-cells-with-p53-defects-under-heat-stress
#14
Yukihiro Furusawa, Yuka Yamanouchi, Takashi Iizumi, Qing-Li Zhao, Yohei Mitsuhashi, Akinori Morita, Atushi Enomoto, Yoshiaki Tabuchi, Takashi Kondo
Hyperthermia induced by heat stress (HS) is known to inhibit proliferation and induce cell death in cancer. We previously demonstrated that checkpoint kinase 1 (Chk1) contributes to G2/M arrest and cell survival under HS; however, the role of Chk2, a functional analog of Chk1, in regulation of the cell cycle and cell death under HS is still unknown. Here, we addressed the role of Chk2 using Molt-4 cells with p53-targeted shRNA (Molt-4/shp53) and parental control cells (Molt-4/V). Chk2 inhibition suppressed C-terminal acetylation of p53 and delayed the induction of p53-target genes in Molt-4/V cells under HS; however, Chk2 inhibition failed to inhibit apoptosis induced by HS, indicating that Chk2 was dispensable for p53-dependent apoptosis under HS...
July 21, 2017: Apoptosis: An International Journal on Programmed Cell Death
https://www.readbyqxmd.com/read/28733590/hypersaline-sapropels-act-as-hotspots-for-microbial-dark-matter
#15
Adrian-Ştefan Andrei, Andreea Baricz, Michael Scott Robeson, Manuela Raluca Păuşan, Tudor Tămaş, Cecilia Chiriac, Edina Szekeres, Lucian Barbu-Tudoran, Erika Andrea Levei, Cristian Coman, Mircea Podar, Horia Leonard Banciu
Present-day terrestrial analogue sites are crucial ground truth proxies for studying life in geochemical conditions close to those assumed to be present on early Earth or inferred to exist on other celestial bodies (e.g. Mars, Europa). Although hypersaline sapropels are border-of-life habitats with moderate occurrence, their microbiological and physicochemical characterization lags behind. Here, we study the diversity of life under low water activity by describing the prokaryotic communities from two disparate hypersaline sapropels (Transylvanian Basin, Romania) in relation to geochemical milieu and pore water chemistry, while inferring their role in carbon cycling by matching taxa to known taxon-specific biogeochemical functions...
July 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28733405/analysis-of-dna-replication-in-fission-yeast-by-combing
#16
Divya R Iyer, Shankar Das, Nick Rhind
DNA replication studies based on population experiments give an average estimate of replication kinetics from many cells. This average replication profile masks the stochastic nature of origin firing in eukaryotes, which is revealed by using single-molecule techniques, such as DNA combing. The analysis of replication kinetics by DNA combing involves isolating DNA from cells that have been pulse-labeled with thymidine analogs and stretching it on a silanized coverslip. The analog-labeled patches on the stretched DNA fibers can then be detected using fluorescent antibodies against the analog...
July 21, 2017: Cold Spring Harbor Protocols
https://www.readbyqxmd.com/read/28733399/synchronous-induction-of-meiosis-in-the-fission-yeast-schizosaccharomyces-pombe
#17
Akira Yamashita, Takeshi Sakuno, Yoshinori Watanabe, Masayuki Yamamoto
In fission yeast Schizosaccharomyces pombe, initiation of meiosis is repressed by Pat1 kinase. This protocol describes how ectopic inactivation of the temperature-sensitive Pat1-114 kinase in G1-arrested h(-)/h(-) diploid cells carrying mat1-Pc induces a highly synchronized commitment to and execution of meiosis. Haploid or diploid pat1-114 mutants without mat1-Pc can also be used for convenience, although less synchrony may be attained compared with induction using true diploids. An essentially identical protocol can be used for induction via inhibition of genetically sensitized Pat1 kinase by ATP analogs...
July 21, 2017: Cold Spring Harbor Protocols
https://www.readbyqxmd.com/read/28733151/chewing-gum-decreases-energy-intake-at-lunch-following-a-controlled-breakfast
#18
Kathleen J Melanson, Daniel L Kresge
The impact of chewing gum on fasting appetite or meal intake has not been studied. We tested the hypothesis that chewing gum would decrease lunch intake after a controlled breakfast, and reduce hunger in fasting and fed states. Seventeen males and sixteen females (21.4 ± 6.3y, BMI 23.8 ± 2.7 kg/m(2)) participated in a randomized crossover study in which subjects chewed sugar-free gum a total of one hour on the test day (GC), and did not chew gum on a control day (NG). The 1 h of gum chewing included 20 min while fasting, and two 20-min sessions between breakfast and lunch...
July 18, 2017: Appetite
https://www.readbyqxmd.com/read/28733100/long-term-outcomes-after-distal-scaphoid-fractures-a-10-year-follow-up
#19
Martin Clementson, Niels Thomsen, Jack Besjakov, Peter Jørgsholm, Anders Björkman
PURPOSE: The aim of this study was to evaluate the functional, clinical, and radiological outcome 10 years after distal scaphoid fractures. METHODS: From a prospective epidemiological study on posttraumatic radial-sided wrist pain, we evaluated 41 cases of distal scaphoid fractures. All cases had been treated nonsurgically in a thumb spica cast. Patients were examined using radiographs, magnetic resonance imaging and computed tomography at the time of injury and with computed tomography after a median of 10 years (range, 8-11 years)...
July 18, 2017: Journal of Hand Surgery
https://www.readbyqxmd.com/read/28732303/do-analog-number-representations-underlie-the-meanings-of-young-children-s-verbal-numerals
#20
Susan Carey, Anna Shusterman, Paul Haward, Rebecca Distefano
Children learn to count, and even learn the cardinal meanings of the first three or four verbal numerals ("one" through "three" or "four"), before they master the numerical significance of counting. If so, it follows that the cardinal meanings of those first few numerals cannot be derived, initially, from their place in the count list and the counting routine. What non-verbal representations, then, support the cardinal meanings of verbal numerals before children have mastered how counting does so? Four experiments addressed the commonly adopted assumption that in the earliest period of learning the meanings of number words, children map verbal numerals to regions of the analog number system (ANS), a system of representation with numerical content that is widely attested in animals and in human infants...
July 18, 2017: Cognition
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