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https://www.readbyqxmd.com/read/27931775/rhythmic-wrist-movements-facilitate-the-soleus-h-reflex-and-non-voluntary-air-stepping-in-humans
#1
Irina A Solopova, Victor A Selionov, Egor O Blinov, Dmitri S Zhvansky, Yury P Ivanenko
Neural coupling between the upper and lower limbs during human walking is supported by modulation of cross-limb reflexes and the presence of rhythmic activity in the proximal arm muscles. Nevertheless, the involvement of distal arm muscles in cyclic movements and sensorimotor neuromodulation is also suggested given their step-synchronized activation in many locomotor-related tasks (e.g., swimming, skiing, climbing, cycling, crawling, etc.). Here we investigated the effect of rhythmic wrist movements, separately and in conjunction with arm swinging, on the characteristics of non-voluntary cyclic leg movements evoked by muscle vibration in a gravity neutral position and on the soleus H-reflex of the stationary legs...
December 5, 2016: Neuroscience Letters
https://www.readbyqxmd.com/read/27922162/nonmelanoma-skin-cancer-in-mountain-guides-high-prevalence-and-lack-of-awareness-warrant-development-of-evidence-based-prevention-tools
#2
Alexander Zink, Elisabeth Koch, Florian Seifert, Markus Rotter, Christoph D Spinner, Tilo Biedermann
AIMS OF THE STUDY: Nonmelanoma skin cancer (NMSC) is the most common cancer in Switzerland and Europe. The main causative factor is exposure to ultraviolet radiation, which puts outdoor workers in general at a higher risk of developing NMSC than indoor workers. However, few studies have clinically examined the risk of developing NMSC to outdoor workers, especially mountain guides. We aimed to investigate the prevalence of NMSC and corresponding precancerous lesions, and the associated risk behaviour of mountain and ski guides in order to develop future prevention programmes...
2016: Swiss Medical Weekly
https://www.readbyqxmd.com/read/27920219/the-proprotein-convertases-in-hypercholesterolemia-and-cardiovascular-diseases-emphasis-on-proprotein-convertase-subtilisin-kexin-9
#3
REVIEW
Nabil G Seidah, Marianne Abifadel, Stefan Prost, Catherine Boileau, Annik Prat
The secretory proprotein convertase (PC) family comprises nine members, as follows: PC1/3, PC2, furin, PC4, PC5/6, paired basic amino acid cleaving enzyme 4, PC7, subtilisin kexin isozyme 1/site 1 protease (SKI-1/S1P), and PC subtilisin/kexin type 9 (PCSK9). The first seven PCs cleave their substrates at single/paired basic residues and exhibit specific and often essential functions during development and/or in adulthood. The essential SKI-1/S1P cleaves membrane-bound transcription factors at nonbasic residues...
January 2017: Pharmacological Reviews
https://www.readbyqxmd.com/read/27918680/is-there-an-optimal-pole-length-for-double-poling-in-cross-country-skiing
#4
Franziska Onasch, Anthony Killick, Walter Herzog
The aim of this study was to determine the effects of pole length on energy cost and kinematics in cross country double poling. Seven sub-elite male athletes were tested using pole sets of different lengths (ranging between 77 and 98% of participants' body height). Tests were conducted on a treadmill, set to a 2% incline and an approximate racing speed. Poling forces, contact times, and oxygen uptake were measured throughout the testing. Pole length was positively correlated with ground contact time (r = .57, p < ...
December 5, 2016: Journal of Applied Biomechanics
https://www.readbyqxmd.com/read/27918675/biomechanics-in-paralympics-implications-for-performance
#5
Floor Morriën, Matthew J D Taylor, Florentina J Hettinga
PURPOSE: To provide an overview of biomechanical studies in Paralympic research and their relevance for performance in Paralympic sports. METHODS: Search terms ' Paralympic Biomechanics', 'Paralympic Sport Performance', 'Paralympic Athlete Performance', and Paralympic Athlete' were entered into the electronic database PubMed. RESULTS: Thirty-four studies were included. Biomechanical studies in Paralympics mainly contributed to performance enhancement by technical optimization (n=32) and/or injury prevention (n=6)...
December 5, 2016: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/27915067/the-feasibility-and-effects-of-acupuncture-in-an-adolescent-nordic-ski-population
#6
Kristin L Garlanger, William H Fredericks, Alexander Do, Brent A Bauer, Edward R Laskowski
BACKGROUND: Studies investigating the use and effectiveness of acupuncture in adults post exercise have been well documented. Fewer studies involving acupuncture have been completed in the adolescent athlete population. To our knowledge there are no published studies that investigate the use of acupuncture in adolescent athletes within their field of play. OBJECTIVE: To primarily assess the feasibility of performing acupuncture in adolescent Nordic skiers within their athletic environment, and secondarily to measure the effect of acupuncture on muscle soreness and sense of well-being...
November 30, 2016: PM & R: the Journal of Injury, Function, and Rehabilitation
https://www.readbyqxmd.com/read/27909446/functional-toxicogenomic-profiling-expands-insight-into-modulators-of-formaldehyde-toxicity-in-yeast
#7
Matthew North, Brandon D Gaytán, Carlos Romero, Vanessa Y De La Rosa, Alex Loguinov, Martyn T Smith, Luoping Zhang, Chris D Vulpe
Formaldehyde (FA) is a commercially important chemical with numerous and diverse uses. Accordingly, occupational and environmental exposure to FA is prevalent worldwide. Various adverse effects, including nasopharyngeal, sinonasal, and lymphohematopoietic cancers, have been linked to FA exposure, prompting designation of FA as a human carcinogen by U.S. and international scientific entities. Although the mechanism(s) of FA toxicity have been well studied, additional insight is needed in regard to the genetic requirements for FA tolerance...
2016: Frontiers in Genetics
https://www.readbyqxmd.com/read/27904661/a-novel-sphingosine-kinase-1-inhibitor-ski-5c-induces-cell-death-of-wilms-tumor-cells-in-vitro-and-in-vivo
#8
Zhi-Heng Li, Yan-Fang Tao, Li-Xiao Xu, He Zhao, Xiao-Lu Li, Fang Fang, Yi Wu, Jun Lu, Yan-Hong Li, Wei-Wei Du, Jun-Li Ren, Yi-Ping Li, Yun-Yun Xu, Xing Feng, Jian Wang, Wei-Qi He, Jian Pan
Sphingosine kinase 1 (SphK1) is over-expressed in many cancers and therefore serves as a biomarker for cancer prognosis. SKI-5C is a new SphK1 inhibitor, and until now its molecular function in Wilms' tumor cells remained unknown. Here, using CCK-8 and nude mice experiments we assessed cell growth in Wilms' tumor cell lines (SK-NEP-1 and G401) in vitro and in vivo. We demonstrated that SphK1 is highly expressed in SK-NEP-1 and G401 cells, and through annexin V/propidium iodide staining and flow cytometry analysis, we detected cell apoptosis...
2016: American Journal of Translational Research
https://www.readbyqxmd.com/read/27903474/functional-assessment-and-evaluation-of-outcome-after-endovascular-therapy-with-coverage-of-the-left-subclavian-artery-in-case-of-blunt-thoracic-aortic-injury
#9
A Gombert, D Kotelis, U M Griepenkerl, G Fraedrich, J Klocker, B Glodny, M J Jacobs, A Greiner, J Grommes
OBJECTIVE: Patients suffering blunt thoracic aortic injury (BTAI) can be treated by use of thoracic endovascular aortic repair (TEVAR). In this setting, the coverage of the left subclavian artery (LSA) is frequently necessary. Nevertheless, the functionality of the upper left extremity after TEVAR had been rarely analyzed. Thus this study intends to underline the safety of TEVAR as well as to determine the functionality of the left arm after coverage of the LSA. METHODS: All patients suffering from BTAI treated by endovascular means in three centers (Aachen [Germany], Maastricht [Netherlands] and Innsbruck [Austria]) between 1996 and 2009 were retrospectively analyzed...
November 26, 2016: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/27902484/depletion-of-mitochondrial-reactive-oxygen-species-downregulates-epithelial-to-mesenchymal-transition-in-cervical-cancer-cells
#10
Galina Shagieva, Lidiya Domnina, Olga Makarevich, Boris Chernyak, Vladimir Skulachev, Vera Dugina
In the course of cancer progression, epithelial cells often acquire morphological and functional characteristics of mesenchymal cells, a process known as epithelial-to-mesenchymal transition (EMT). EMT provides epithelial cells with migratory, invasive, and stem cell capabilities. Reactive oxygen species produced by mitochondria (mtROS) could be of special importance for pro-tumorigenic signaling and EMT.In our study, we used mitochondria-targeted antioxidant SkQ1 to lower the mtROS level and analyze their role in the regulation of the actin cytoskeleton, adhesion junctions, and signaling pathways critical for tumorigenesis of cervical carcinomas...
November 25, 2016: Oncotarget
https://www.readbyqxmd.com/read/27890936/increased-proportion-of-mature-nk-cells-is-associated-with-successful-imatinib-discontinuation-in-chronic-myeloid-leukemia
#11
M Ilander, U Olsson-Strömberg, H Schlums, J Guilhot, O Brück, H Lähteenmäki, T Kasanen, P Koskenvesa, S Söderlund, M Höglund, B Markevärn, A Själander, K Lotfi, A Dreimane, A Lübking, E Holm, M Björeman, S Lehmann, L Stenke, L Ohm, T Gedde-Dahl, W Majeed, H Ehrencrona, S Koskela, S Saussele, F-X Mahon, K Porkka, H Hjorth-Hansen, Y T Bryceson, J Richter, S Mustjoki
Recent studies suggest that a proportion of chronic myeloid leukemia (CML) patients in deep molecular remission can discontinue the tyrosine kinase inhibitor (TKI) treatment without disease relapse. In this multi-center, prospective clinical trial (EURO-SKI, NCT01596114) we analyzed the function and phenotype of T and NK cells and their relation to successful TKI cessation. Lymphocyte subclasses were measured from 100 imatinib treated patients at baseline and 1 month after the discontinuation, and functional characterization of NK and T cells was done from 45 patients...
November 28, 2016: Leukemia: Official Journal of the Leukemia Society of America, Leukemia Research Fund, U.K
https://www.readbyqxmd.com/read/27889683/biomechanics-of-simulated-versus-natural-cross-country-sit-skiing
#12
V Rosso, L Gastaldi, W Rapp, S Lindinger, Y Vanlandewijck, V Linnamo
The purpose of this study was to investigate the biomechanics of cross-country sit-skiing in simulated and natural skiing. Thirteen international level athletes participated in a ski ergometer test (simulated conditions) and a test on snow in a ski-tunnel (natural conditions) using their personal sit-ski. Tests in both conditions were performed at individual maximal speed. When comparing the two conditions the main results were: (1) maximal speed in simulated conditions was lower (p<0.05) but correlated well with the natural condition (r=0...
November 11, 2016: Journal of Electromyography and Kinesiology
https://www.readbyqxmd.com/read/27884864/sports-injuries-and-illnesses-in-the-lillehammer-2016-youth-olympic-winter-games
#13
Kathrin Steffen, Christine Holm Moseid, Lars Engebretsen, Pia K Søberg, Olav Amundsen, Kristian Holm, Thomas Moger, Torbjørn Soligard
BACKGROUND: Injury and illness surveillance during high-level youth sports events is an important first step in health prevention and caretaking of the young elite athletes. AIM: To analyse injuries and illnesses that occurred during the 10 days 2nd Youth Olympic Winter Games (YOG), held in Lillehammer 2016. METHODS: We recorded the daily occurrence (or non-occurrence) of injuries and illnesses through the reporting of (1) all National Olympic Committee (NOC) medical teams and (2) the polyclinic and medical venues by the Lillehammer Organising Committee (LYOCOG) medical staff...
November 24, 2016: British Journal of Sports Medicine
https://www.readbyqxmd.com/read/27878721/evaluation-in-vitro-of-immunoregulatory-cytokines-secretion-by-dendritic-cells-in-mountain-skiers
#14
V S Evstratova, D B Nikityuk, N A Riger, N V Fedyanina, R A Khanferyan
In vitro production of immunoregulatory cytokines (IFN-α, IL-31, TNF-β, IL-17A, IL-7, IL-1RA, IL-1α, IL-10, IL-15, IL-21, IL-22, IL-23, IL-27, and IL-9) by dendritic cell cultures was compared in ski athletes and healthy donors. Effect of prolonged intense physical exercise on secretory activity of immune cells was investigated. In both groups, secretion of IL-1RA, IL-10, IL-1α by dendritic cells was revealed, but there were significant differences in IL-1RA, IL-1α content (p<0.05) with lower level in the group of athletes...
November 23, 2016: Bulletin of Experimental Biology and Medicine
https://www.readbyqxmd.com/read/27877070/aerobic-power-and-lean-mass-are-indicators-of-competitive-sprint-performance-among-elite-female-cross-country-skiers
#15
Tomas Carlsson, Michail Tonkonogi, Magnus Carlsson
The purpose of this study was to establish the optimal allometric models to predict International Ski Federation's ski-ranking points for sprint competitions (FISsprint) among elite female cross-country skiers based on maximal oxygen uptake ( [Formula: see text]) and lean mass (LM). Ten elite female cross-country skiers (age: 24.5±2.8 years [mean ± SD]) completed a treadmill roller-skiing test to determine [Formula: see text] (ie, aerobic power) using the diagonal stride technique, whereas LM (ie, a surrogate indicator of anaerobic capacity) was determined by dual-emission X-ray anthropometry...
2016: Open Access Journal of Sports Medicine
https://www.readbyqxmd.com/read/27876383/helmet-use-and-injury-severity-among-pediatric-skiers-and-snowboarders-in-colorado
#16
Melissa Milan, Sandeep Jhajj, Camille Stewart, Laura Pyle, Steven Moulton
INTRODUCTION: Skiing and snowboarding are popular winter recreational activities that are commonly associated with orthopedic type injuries. Unbeknownst to most parents, however, are the significant but poorly described risks for head, cervical spine and solid organ injuries. Although helmet use is not mandated for skiers and snowboarders outside of resort sponsored activities, we hypothesized that helmet use is associated with a lower risk of severe head injury, shorter ICU stay and shorter hospital length of stay...
November 6, 2016: Journal of Pediatric Surgery
https://www.readbyqxmd.com/read/27875493/acute-lumbar-paraspinal-myonecrosis-in-football-players-with-sickle-cell-trait-a-case-series
#17
E Randy Eichner, Brock Schnebel, Scott Anderson, James R Clugston, Heath Hale, Charlie Michaudet, John M Small
We report 6 cases of a novel syndrome of acute, exertional low back pain (LBP) in football players, 5 in college and one in the National Football League (NFL). All 6 are African-Americans with sickle cell trait (SCT). The acute LBP is severe and can be disabling, and the condition can be confused with muscle strain, discogenic pain, stress fracture, or other problems in athletes. Our evidence shows that this syndrome is caused by lumbar paraspinal myonecrosis (LPSMN), which likely often contributes to the lumbar paraspinal compartment syndrome...
November 21, 2016: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/27851508/1873-the-sky-s-the-limit-high-dose-insulin-for-calcium-channel-blocker-overdose
#18
Kinsley Hubel, Jessica Bunin
No abstract text is available yet for this article.
December 2016: Critical Care Medicine
https://www.readbyqxmd.com/read/27837221/femoral-avulsion-fracture-of-acl-proximal-attachment-in-male-scuba-diver-case-report-and-review-of-the-literature
#19
Sebastian Zabierek, Krzysztof Nowak, Marcin Domzalski
Femoral ACL avulsion fractures were not well described in the literature, and there were only several reports describing mostly immature patients. A case of 50-year-old man with ACL femoral attachment avulsion fracture after pivoting knee injury during skiing was presented. The bony attachment was reduced and fixed arthroscopically with screws. Four months after surgery, patient was allowed to return to full sport activity with full range of motion. He was able to perform a one-leg-hop test without limitation, and the strength of quadriceps muscle was comparable to contralateral side...
November 11, 2016: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/27808056/-mountain-medicine-an-introduction-i
#20
Kasper Fjellhaugen Hjuler, Bjørn Bay
Tourism to high-altitude areas is increasingly popular even from low-lying regions such as Denmark. Mountain sports include skiing, mountaineering, and ski touring. The young, elderly and at-risk individuals with pre-existing illnesses engage in recreational mountain activities. Thus, risk assessment and counselling regarding altitude exposure is increasingly relevant to all healthcare providers. In this first article of two in a review series, we summarize the state of the art of altitude physiology, alpine dangers and avalanches, and medical aspects of the increased UV-exposure at altitude...
October 31, 2016: Ugeskrift for Laeger
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