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https://www.readbyqxmd.com/read/27922025/water-exchange-method-significantly-improves-adenoma-detection-rate-a-multicenter-randomized-controlled-trial
#1
Hui Jia, Yanglin Pan, Xuegang Guo, Lina Zhao, Xiangping Wang, Linhui Zhang, Tao Dong, Hui Luo, Zhizheng Ge, Jun Liu, Jianyu Hao, Ping Yao, Yao Zhang, Hongyu Ren, Weizhen Zhou, Yujie Guo, Wei Zhang, Xiaolin Chen, Dayong Sun, Xiaoqiang Yang, Xiaoyu Kang, Na Liu, Zhiguo Liu, Felix Leung, Kaichun Wu, Daiming Fan
OBJECTIVES: Adenoma detection rate (ADR) is a key colonoscopy quality indicator in Western clinical literature. Our low ADR prompted us to assess novel methods to improve performance. Western retrospective reports suggested that water exchange (WE) could increase ADR. However, most of these studies used pain score or intubation rate as the primary outcome. Here we test the hypothesis that WE significantly increases ADR among Chinese colonoscopists and design a prospective randomized controlled trial using ADR as our primary outcome...
December 6, 2016: American Journal of Gastroenterology
https://www.readbyqxmd.com/read/27921370/not-just-for-coding-a-new-role-for-histone-tails-in-replication-enzyme-activation
#2
Anja-Katrin Bielinsky, Wendy Leung
The processing of Okazaki fragments when they are assembled into nucleosomes has received little attention. In this issue of The FEBS Journal, Seo and colleagues show that binding to histone tails stimulates the enzymatic activity of flap endonuclease 1 (Rad27). Histone tails are structurally similar to the C terminus of Rad27 and can thus mimic its autostimulatory function. This study highlights an active regulatory role for nucleosomes on DNA metabolism.
December 2016: FEBS Journal
https://www.readbyqxmd.com/read/27920428/mitigating-herding-in-hierarchical-crowdsourcing-networks
#3
Han Yu, Chunyan Miao, Cyril Leung, Yiqiang Chen, Simon Fauvel, Victor R Lesser, Qiang Yang
Hierarchical crowdsourcing networks (HCNs) provide a useful mechanism for social mobilization. However, spontaneous evolution of the complex resource allocation dynamics can lead to undesirable herding behaviours in which a small group of reputable workers are overloaded while leaving other workers idle. Existing herding control mechanisms designed for typical crowdsourcing systems are not effective in HCNs. In order to bridge this gap, we investigate the herding dynamics in HCNs and propose a Lyapunov optimization based decision support approach - the Reputation-aware Task Sub-delegation approach with dynamic worker effort Pricing (RTS-P) - with objective functions aiming to achieve superlinear time-averaged collective productivity in an HCN...
December 2016: Scientific Reports
https://www.readbyqxmd.com/read/27919057/principles-of-precision-medicine-in-stroke
#4
REVIEW
Jason D Hinman, Natalia S Rost, Thomas W Leung, Joan Montaner, Keith W Muir, Scott Brown, Juan F Arenillas, Edward Feldmann, David S Liebeskind
The era of precision medicine has arrived and conveys tremendous potential, particularly for stroke neurology. The diagnosis of stroke, its underlying aetiology, theranostic strategies, recurrence risk and path to recovery are populated by a series of highly individualised questions. Moreover, the phenotypic complexity of a clinical diagnosis of stroke makes a simple genetic risk assessment only partially informative on an individual basis. The guiding principles of precision medicine in stroke underscore the need to identify, value, organise and analyse the multitude of variables obtained from each individual to generate a precise approach to optimise cerebrovascular health...
October 19, 2016: Journal of Neurology, Neurosurgery, and Psychiatry
https://www.readbyqxmd.com/read/27918907/prevalence-and-characteristics-of-cancer-patients-receiving-care-from-single-vs-multiple-institutions
#5
Christina A Clarke, Sally L Glaser, Rita Leung, Kathleen Davidson-Allen, Scarlett L Gomez, Theresa H M Keegan
INTRODUCTION: Patients may receive cancer care from multiple institutions. However, at the population level, such patterns of cancer care are poorly described, complicating clinical research. To determine the population-based prevalence and characteristics of patients seen by multiple institutions, we used operations data from a state-mandated cancer registry. METHODS AND MATERIALS: 59,672 invasive cancers diagnosed in 1/1/2010-12/31/2011 in the Greater Bay Area of northern California were categorized as having been reported to the cancer registry within 365days of diagnosis by: 1) ≥1 institution within an integrated health system (IHS); 2) IHS institution(s) and ≥1 non-IHS institution (e...
December 2, 2016: Cancer Epidemiology
https://www.readbyqxmd.com/read/27918456/examining-the-cervical-screening-behaviour-of-women-aged-50-or-above-and-its-predicting-factors-a-population-based-survey
#6
Carmen W H Chan, Kai Chow Choi, Rosa S Wong, Ka Ming Chow, Winnie K W So, Doris Y P Leung, Wendy W T Lam, William Goggins
Under-screening may increase the risk of cervical cancer in middle-aged women. This study aimed to investigate cervical cancer screening behaviour and its predictors among women aged 50 years or above. A population-based sample of 959 women was recruited by telephone from domestic households in Hong Kong, using random methods, and a structured questionnaire developed to survey participants. Multivariable logistic regressions were performed to examine the factors independently associated with cervical screening behaviour...
December 2, 2016: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/27916730/stimulus-exposure-duration-alters-implicit-processing-of-neutral-and-emotional-faces
#7
Jane E Kouptsova, Rachel C Leung, Margot J Taylor
Stimulus exposure duration in emotion perception research is often chosen pragmatically; however, little work exists on the consequences of stimulus duration for the processing of emotional faces. We utilized the spatiotemporal resolution capabilities of magnetoencephalography (MEG) to characterize early implicit processing of emotional and neutral faces in response to stimuli presented for 80 and 150 milliseconds. We found that the insula was recruited to a greater degree within the short (80ms) condition for all face categories, and this effect was more pronounced for emotional compared to neutral faces...
December 1, 2016: Neuroscience
https://www.readbyqxmd.com/read/27916660/isoform-switch-of-tet1-regulates-dna-demethylation-and-mouse-development
#8
Wenhao Zhang, Weikun Xia, Qiujun Wang, Aaron J Towers, Jiayu Chen, Rui Gao, Yu Zhang, Chia-An Yen, Ah Young Lee, Yuanyuan Li, Chen Zhou, Kaili Liu, Jing Zhang, Tian-Peng Gu, Xiuqi Chen, Zai Chang, Danny Leung, Shaorong Gao, Yong-Hui Jiang, Wei Xie
The methylcytosine oxidase TET proteins play important roles in DNA demethylation and development. However, it remains elusive how exactly they target substrates and execute oxidation. Interestingly, we found that, in mice, the full-length TET1 isoform (TET1e) is restricted to early embryos, embryonic stem cells (ESCs), and primordial germ cells (PGCs). By contrast, a short isoform (TET1s) is preferentially expressed in somatic cells, which lacks the N terminus including the CXXC domain, a DNA-binding module that often recognizes CpG islands (CGIs) where TET1 predominantly occupies...
November 15, 2016: Molecular Cell
https://www.readbyqxmd.com/read/27916206/how-many-oocytes-are-optimal-to%C3%A2-achieve-multiple-live-births-with%C3%A2-one-stimulation-cycle-the%C3%A2-one%C3%A2-and-done-approach
#9
Denis A Vaughan, Angela Leung, Nina Resetkova, Robin Ruthazer, Alan S Penzias, Denny Sakkas, Michael M Alper
OBJECTIVE: To study how many infertility patients would complete an average-sized family (achieve ≥2 live births) after a single, complete in vitro fertilization (IVF) cycle. DESIGN: A retrospective cohort study. SETTING: University-affiliated private infertility practice. PATIENT(S): Women undergoing IVF. INTERVENTION(S): None. MAIN OUTCOME MEASURE(S): The outcome of 1 or ≥2 live births after a single retrieval cycle, followed by use of all embryos in subsequent frozen cycles in relation to oocyte number...
December 1, 2016: Fertility and Sterility
https://www.readbyqxmd.com/read/27914853/monitoring-the-fitness-of-antiviral-resistant-influenza-strains-during-an-epidemic-a-mathematical-modelling-study
#10
Kathy Leung, Marc Lipsitch, Kwok Yung Yuen, Joseph T Wu
BACKGROUND: Antivirals (eg, oseltamivir) are important for mitigating influenza epidemics. In 2007, an oseltamivir-resistant influenza seasonal A H1N1 strain emerged and spread to global fixation within 1 year. This event showed that antiviral-resistant (AVR) strains can be intrinsically more transmissible than their contemporaneous antiviral-sensitive (AVS) counterpart. Surveillance of AVR fitness is therefore essential. Our objective was to develop a simple method for estimating AVR fitness from surveillance data...
November 30, 2016: Lancet Infectious Diseases
https://www.readbyqxmd.com/read/27914259/city-scale-analysis-of-water-related-energy-identifies-more-cost-effective-solutions
#11
Ka Leung Lam, Steven J Kenway, Paul A Lant
Energy and greenhouse gas management in urban water systems typically focus on optimising within the direct system boundary of water utilities that covers the centralised water supply and wastewater treatment systems, despite a greater energy influence by the water end use. This work develops a cost curve of water-related energy management options from a city perspective for a hypothetical Australian city. It is compared with that from the water utility perspective. The curves are based on 18 water-related energy management options that have been implemented or evaluated in Australia...
November 26, 2016: Water Research
https://www.readbyqxmd.com/read/27914088/murine-mycobacterium-marinum-infection-as-a-model-for-tuberculosis
#12
Julia Lienard, Fredric Carlsson
Mycobacteria are a major human health problem globally. Regarding tuberculosis the situation is worsened by the poor efficacy of current vaccine regimens and by emergence of drug-resistant strains (Manjelievskaia J et al, Trans R Soc Trop Med Hyg 110: 110, 2016; Pereira et al., Lancet Infect Dis 12:300-306, 2012; http://www.who.int/tb/publications/global_report/en/) undermining both disease-prevention and available treatments. Thus, increased basic understanding of mycobacterial-and particularly Mycobacterium tuberculosis-virulence strategies and pathogenesis is of great importance...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/27913755/applications-of-three-dimensional-printing-in-surgery
#13
REVIEW
Chi Li, Tsz Fung Cheung, Vei Chen Fan, Kin Man Sin, Chrisity Wai Yan Wong, Gilberto Ka Kit Leung
Three-dimensional (3D) printing is a rapidly advancing technology in the field of surgery. This article reviews its contemporary applications in 3 aspects of surgery, namely, surgical planning, implants and prostheses, and education and training. Three-dimensional printing technology can contribute to surgical planning by depicting precise personalized anatomy and thus a potential improvement in surgical outcome. For implants and prosthesis, the technology might overcome the limitations of conventional methods such as visual discrepancy from the recipient's body and unmatching anatomy...
December 2, 2016: Surgical Innovation
https://www.readbyqxmd.com/read/27913182/virtual-screening-and-biophysical-studies-lead-to-hsp90-inhibitors
#14
Renjie Huang, Daniel M Ayine-Tora, M Nasri Muhammad Rosdi, Yu Li, Jóhannes Reynisson, Ivanhoe K H Leung
Heat shock protein 90 (HSP90) is a molecular chaperone that plays important functional roles in cells. The chaperone activity of HSP90 is regulated by the hydrolysis of ATP at the protein's N-terminal domain. HSP90, in particular the N-terminal domain, is a current inhibition target for therapeutic treatments of cancers. This paper describes an application of virtual screening, thermal shift assaying and protein NMR spectroscopy leading to the discovery of HSP90 inhibitors that contain the resorcinol structure...
November 23, 2016: Bioorganic & Medicinal Chemistry Letters
https://www.readbyqxmd.com/read/27912950/a-randomized-placebo-controlled-trial-of-traditional-chinese-medicine-as-an-add-on-therapy-to-oral-montelukast-in-the-treatment-of-mild-persistent-asthma-in-children
#15
Pak-Hong Chan, Ching-Yee To, Eric Yat-Tung Chan, Handong Li, Xiuxia Zhang, Pok-Yu Chow, Po-Ling Liu, Shuk-Yu Leung, Chung-Hong Chan, Ka-Yan Chan, Johnny Yick-Chun Chan, Jonathan Pak-Heng Ng, Daniel Kwok-Keung Ng
OBJECTIVES: Traditional Chinese medicine are commonly used for treatment of asthma. However, there are only very limited data about its efficacy in children. Therefore, we aimed to determine the efficacy of augmented Yu Ping Feng San (aYPFS) as an add-on to oral montelukast compared with montelukast alone for treatment of mild persistent asthma in children. DESIGN: A single centre, placebo-controlled, double-blinded, randomized control trial was carried out. Participants with age 6-18 years who had mild persistent asthma were randomized according to random number list to receive either aYPFS plus montelukast for 24 weeks or placebo plus montelukast for 24 weeks...
December 2016: Complementary Therapies in Medicine
https://www.readbyqxmd.com/read/27910909/the-disinfection-characteristics-of-ebola-virus-outbreak-variants
#16
Bradley W M Cook, Todd A Cutts, Aidan M Nikiforuk, Anders Leung, Darwyn Kobasa, Steven S Theriault
The recent Ebola virus outbreak in West Africa has forced experts to re-evaluate their understanding of how to best disinfect areas contaminated with infectious bodily fluids. Recent research has found that Ebola virus remains viable in blood for 7-10 days making appropriate disinfection crucial to infection control. We sought to determine if the three most important outbreak variants of Zaire ebolavirus (Mayinga, Kikwit and Makona) exhibit separate phenotypes when challenged with a range of sodium hypochlorite (NaOCl) concentrations or 70% ethanol (EtOH) at average West African temperature...
December 2, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27910883/the-mechanism-of-transactivation-regulation-due-to-polymorphic-short-tandem-repeats-strs-using-igf1-promoter-as-a-model
#17
Holly Y Chen, Suk Ling Ma, Wei Huang, Lindan Ji, Vincent H K Leung, Honglin Jiang, Xiaoqiang Yao, Nelson L S Tang
Functional short tandem repeats (STR) are polymorphic in the population, and the number of repeats regulates the expression of nearby genes (known as expression STR, eSTR). STR in IGF1 promoter has been extensively studied for its association with IGF1 concentration in blood and various clinical traits and represents an important eSTR. We previously used an in-vitro luciferase reporter model to examine the interaction between STRs and SNPs in IGF1 promoter. Here, we further explored the mechanism how the number of repeats of the STR regulates gene transcription...
December 2, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27910368/airfoil-based-electromagnetic-energy-harvester-containing-parallel-array-motion-between-moving-coil-and-multi-pole-magnets-towards-enhanced-power-density
#18
Chung Ming Leung, Ya Wang, Wusi Chen
In this letter, the airfoil-based electromagnetic energy harvester containing parallel array motion between moving coil and trajectory matching multi-pole magnets was investigated. The magnets were aligned in an alternatively magnetized formation of 6 magnets to explore enhanced power density. In particular, the magnet array was positioned in parallel to the trajectory of the tip coil within its tip deflection span. The finite element simulations of the magnetic flux density and induced voltages at an open circuit condition were studied to find the maximum number of alternatively magnetized magnets that was required for the proposed energy harvester...
November 2016: Review of Scientific Instruments
https://www.readbyqxmd.com/read/27909358/sensewearmini-and-actigraph-gt3x-accelerometer-classification-of-observed-sedentary-and-light-intensity-physical-activities-in-a-laboratory-setting
#19
Lynne M Feehan, Charles H Goldsmith, April Y F Leung, Linda C Li
Purpose: To compare the ability of SenseWear Mini (SWm) and Actigraph GT3X (AG3) accelerometers to differentiate between healthy adults' observed sedentary and light activities in a laboratory setting. Methods: The 22 participants (15 women, 7 men), ages 19 to 72 years, wore SWm and AG3 monitors and performed five sedentary and four light activities for 5 minutes each while observed in a laboratory setting. Performance was examined through comparisons of accuracy, sensitivity, specificity, positive and negative predictive values, and positive and negative likelihood ratios...
2016: Physiotherapy Canada. Physiothérapie Canada
https://www.readbyqxmd.com/read/27909269/chaperones-and-intimate-physical-examinations-what-do-male-and-female-patients-want
#20
V C Fan, H T Choy, G Yj Kwok, H G Lam, Q Y Lim, Y Y Man, C K Tang, C C Wong, Y F Yu, G Kk Leung
INTRODUCTION: Many studies of patients' perception of a medical chaperone have focused on female patients; that of male patients are less well studied. Moreover, previous studies were largely based on patient populations in English-speaking countries. Therefore, this study was conducted to investigate the perception and attitude of male and female Chinese patients to the presence of a chaperone during an intimate physical examination. METHODS: A cross-sectional guided questionnaire survey was conducted on a convenient sample of 150 patients at a public teaching hospital in Hong Kong...
December 2, 2016: Hong Kong Medical Journal, Xianggang Yi Xue za Zhi
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