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Sangmin Lee, Amy Metcalfe, Maitreyi Raman, Yvette Leung, Fariba Aghajafari, Nicole Letourneau, Remo Panaccione, Gilaad G Kaplan, Cynthia H Seow
Background and Aims: Vitamin D insufficiency is prevalent in individuals with inflammatory bowel disease, as well as in pregnant women; however, the prevalence of vitamin D insufficiency in pregnant women with IBD is unknown. This study assessed the prevalence of vitamin D insufficiency in pregnant women with IBD and the adequacy of recommended supplementation. Methods: A cross-sectional study was conducted in pregnant women with inflammatory bowel disease (Crohn's disease=61, ulcerative colitis=41) and without inflammatory bowel disease (n=574)...
March 13, 2018: Journal of Crohn's & Colitis
Qianqian Wang, Jiahui Xu, Ying Li, Jumin Huang, Zebo Jiang, Yuwei Wang, Liang Liu, Elaine Lai Han Leung, Xiaojun Yao
Protein arginine methyltransferase 5 (PRMT5) is able to regulate gene transcription by catalyzing the symmetrical dimethylation of arginine residue of histone, which plays a key role in tumorigenesis. Many efforts have been taken in discovering small-molecular inhibitors against PRMT5, but very few were reported and most of them were SAM-competitive. EPZ015666 is a recently reported PRMT5 inhibitor with a new binding site, which is different from S-adenosylmethionine (SAM)-binding pocket. This new binding site provides a new clue for the design and discovery of potent and specific PRMT5 inhibitors...
2018: Frontiers in Pharmacology
James Buxbaum, Michael Quezada, Bradford Chong, Nikhil Gupta, Chung Yao Yu, Christianne Lane, Ben Da, Kenneth Leung, Ira Shulman, Stephen Pandol, Bechien Wu
OBJECTIVES: The Pancreatitis Activity Scoring System (PASS) has been derived by an international group of experts via a modified Delphi process. Our aim was to perform an external validation study to assess for concordance of the PASS score with high face validity clinical outcomes and determine specific meaningful thresholds to assist in application of this scoring system in a large prospectively ascertained cohort. METHODS: We analyzed data from a prospective cohort study of consecutive patients admitted to the Los Angeles County Hospital between March 2015 and March 2017...
March 15, 2018: American Journal of Gastroenterology
Jun Xi Liu, Shiu Lun Au Yeung, Man Ki Kwok, June Yue Yan Leung, Shi Lin Lin, Lai Ling Hui, Gabriel Matthew Leung, C Mary Schooling
Birth weight (BW) is inversely associated with diabetes and liver function in Mendelian Randomization studies. Observationally, lower BW is usually also associated with poorer liver function. However, these studies could be confounded by socioeconomic position. Here we assessed if BW is associated with liver function in a unique population with little socio-economic patterning of BW, using both instrumental variable and an observational analysis. We used instrumental variable analysis (IVA) to assess the association of BW with liver function (alanine transaminase (ALT), alkaline phosphatase (ALP), bilirubin, and albumin) at ~17 years with twin status as an instrumental variable in the prospective population-representative "Children of 1997" birth cohort (n = 8327)...
March 12, 2018: Preventive Medicine
Marguerite A Renouf, Steven J Kenway, Ka Leung Lam, Tony Weber, Estelle Roux, Silvia Serrao-Neumann, Darryl Low Choy, Edward A Morgan
Water sensitive interventions are being promoted to reduce the adverse impacts of urban development on natural water cycles. However it is currently difficult to know the best strategy for their implementation because current and desired urban water performance is not well quantified. This is particularly at the city-region scale, which is important for strategic urban planning. This work aimed to fill this gap by quantifying the water performance of urban systems within city-regions using 'urban water metabolism' evaluation, to inform decisions about water sensitive interventions...
February 8, 2018: Water Research
X Melody Qu, Vikram M Velker, Eric Leung, Janice S Kwon, Mohamed A Elshaikh, Iwa Kong, Natalie A Logie, Lucas C Mendez, Louis J van der Putten, Elysia K Donovan, Adnan R Munkarah, Ericka M Wiebe, Carlos Parra-Herran, Andrew Warner, Alexander V Louie, David P D'Souza
OBJECTIVE: As the optimal adjuvant management of stage IA serous or clear cell endometrial cancer is controversial, a multi-institutional review was conducted with the objective of evaluating the appropriateness of various strategies including observation. METHODS: Retrospective chart reviews for 414 consecutive patients who underwent hysterectomy for FIGO stage IA endometrial cancer with serous, clear cell or mixed histology between 2004 and 2015 were conducted in 6 North American centers...
March 12, 2018: Gynecologic Oncology
P Staiger, V Manning, D Leung, K Hall, A Verdejo-Garcia, L Hughes
This has been removed as it was published accidentally. The authors listed wish it to be known that this article was not presented at the conference for which this volume is the proceedings. The full Elsevier Policy on Article Withdrawal can be found at
April 2017: European Psychiatry: the Journal of the Association of European Psychiatrists
Sheena L P Regan, Phil G Knight, John L Yovich, Yee Leung, Frank Arfuso, Arun Dharmarajan
Primordial germ cells migrate to the fetal gonads and proliferate during gestation to generate a fixed complement of primordial follicles, the so-called ovarian reserve. Primordial follicles comprise an oocyte arrested at the diplotene stage of meiosis, surrounded by a layer of pregranulosa cells. Activation of primordial follicles to grow beyond this arrested stage is of particular interest because, once activated, they are subjected to regulatory mechanisms involved in growth, selection, maturation, and ultimately, ovulation or atresia...
2018: Vitamins and Hormones
Mandy Hei Man Leung, Amy Q Shen
The ability to control particle size and size distribution of nanoparticles for drug delivery is essential because it impacts on the biodistribution and cellular uptake of nanoparticles. We present a novel microfluidic assisted nanoprecipitation strategy that enables synthesis of surfactant-free curcumin encapsulated poly(lactide-co-glycolide) nanoparticles (Cur-PLGA NP) with adjustable particle diameters (30-70nm) and narrow particle size distribution (polydispersity index less than 0.2). Our Cur-PLGA NP exhibit excellent colloidal stability and inhibit degradation of curcumin...
March 15, 2018: Langmuir: the ACS Journal of Surfaces and Colloids
Rachana Patel, Janis Fleming, Ernest Mui, Carolyn Loveridge, Peter Repiscak, Arnaud Blomme, Victoria Harle, Mark Salji, Imran Ahmad, Katy Teo, Freddie C Hamdy, Ann Hedley, Niels van den Broek, Gillian Mackay, Joanne Edwards, Owen J Sansom, Hing Y Leung
Metastatic castration-resistant prostate cancer (mCRPC) is a lethal form of treatment-resistant prostate cancer and poses significant therapeutic challenges. Deregulated receptor tyrosine kinase (RTK) signalling mediated by loss of tumour suppressor Sprouty2 (SPRY2) is associated with treatment resistance. Using pre-clinical human and murine mCRPC models, we show that SPRY2 deficiency leads to an androgen self-sufficient form of CRPC Mechanistically, HER2-IL6 signalling axis enhances the expression of androgen biosynthetic enzyme HSD3B1 and increases SRB1-mediated cholesterol uptake in SPRY2-deficient tumours...
March 14, 2018: EMBO Molecular Medicine
Maxine P Bonham, Gloria K W Leung, Rochelle Davis, Tracey L Sletten, Chiara Murgia, Morag J Young, Nina Eikelis, Elisabeth A Lambert, Catherine E Huggins
INTRODUCTION: Shift work is an independent risk factor for cardiovascular disease (CVD). Shift workers who are awake overnight and sleep during the day are misaligned with their body's endogenous circadian rhythm. Eating at night contributes to this increased risk of CVD by forcing the body to actively break down and process nutrients at night. This pilot study aims to determine whether altering meal timing overnight, in a shift working population, will impact favourably on modifiable risk factors for CVD (postprandial bplasma lipids and glucose concentration)...
March 14, 2018: BMJ Open
Hongjian Li, Jiangjun Peng, Yee Leung, Kwong-Sak Leung, Man-Hon Wong, Gang Lu, Pedro J Ballester
It has recently been claimed that the outstanding performance of machine-learning scoring functions (SFs) is exclusively due to the presence of training complexes with highly similar proteins to those in the test set. Here, we revisit this question using 24 similarity-based training sets, a widely used test set, and four SFs. Three of these SFs employ machine learning instead of the classical linear regression approach of the fourth SF (X-Score which has the best test set performance out of 16 classical SFs)...
March 14, 2018: Biomolecules
Yunsong Mu, Zhen Wang, Fengchang Wu, Buqing Zhong, Mingru Yang, Fuhong Sun, Chenglian Feng, Xiaowei Jin, Kenneth M Y Leung, John P Giesy
Metals can pose hazards to marine species and can adversely affect structures and functions of communities of marine species. However, little is known about how structural properties of metal atoms combined with current geographical and climatic conditions affect their toxic potencies. A mathematical model, based on quantitative structure-activity relationships and species sensitivity distributions (QSAR-SSD) was developed by use of acute toxicities of six metals (Cd, Cr, Cu, Hg, Ni, and Zn) to eight marine species and accessory environmental conditions...
March 14, 2018: Environmental Science & Technology
D M Jacobs, W-Y Leung, D Essi, W Park, A Shaver, J Claus, C Ruh, G G Rao
Outpatient parenteral antimicrobial therapy (OPAT) programmes facilitate hospital discharge, but patients remain at risk of complications and consequent healthcare utilisation (HCU). Here we elucidated the incidence of and risk factors associated with HCU in OPAT patients. This was a retrospective, single-centre, case-control study of adult patients discharged on OPAT. Cases (n = 63) and controls (n = 126) were patients that did or did not utilise the healthcare system within 60 days. Characteristics associated with HCU in bivariate analysis (P ≤ 0...
March 14, 2018: Epidemiology and Infection
Xiaoyu Kang, Lina Zhao, Zhiyong Zhu, Felix Leung, Limei Wang, Xiangping Wang, Hui Luo, Linhui Zhang, Tao Dong, Pingying Li, Zhangqin Chen, Gui Ren, Hui Jia, Xiaoyang Guo, Yanglin Pan, Xuegang Guo, Daiming Fan
OBJECTIVES: Split dose of 4 l polyethylene glycol (PEG) is currently the standard regimen for bowel preparation (BP). However, it may be unnecessary for patients without high risks (e.g., old age, constipation, and diabetes, and so on) for inadequate BP. The study aimed to compare the efficacy of bowel cleansing between low-risk patients receiving same-day, single dose of low-volume (SSL) PEG vs. standard regimen. METHODS: This prospective, randomized, observer-blinded, non-inferiority study enrolled low-risk patients in three centers...
March 13, 2018: American Journal of Gastroenterology
Lixin Cheng, Pengfei Liu, Kwong-Sak Leung
Computational clustering methods help identify functional modules in protein-protein interaction (PPI) network, in which proteins participate in the same biological pathways or specific functions. Subcellular localisation is crucial for proteins to implement biological functions and each compartment accommodates specific portions of the protein interaction structure. However, the importance of protein subcellular localisation is often neglected in the studies of module identification. In this study, the authors propose a novel procedure, subcellular module identification with localisation expansion (SMILE), to identify super modules that consist of several subcellular modules performing specific biological functions among cell compartments...
April 2018: IET Systems Biology
Nicole M Bzdyl, Nadezda Urosevic, Ben Payne, Ray Brockenshire, Michael McIntyre, Michael J Leung, Graham Weaire-Buchanan, Elizabeth Geelhoed, Timothy J J Inglis
PURPOSE: In this field trial of rapid blood culture identification (BCID), we aimed to determine whether the improved speed and accuracy of specific BCID predicted in our earlier pilot study could be obtained in regional hospitals by deploying a multiplex PCR FilmArray (Biomerieux, France) capability in their laboratories. METHODS: We trained local hospital laboratory staff to operate the FilmArray equipment and act on the results. To do this, we integrated the multiplex PCR into the standard laboratory blood culture workflow and reporting procedure...
March 13, 2018: Journal of Medical Microbiology
Duo Huang, Yang-Yang Cheng, Pak-Hei Chan, Jojo Hai, Kai-Hang Yiu, Hung-Fat Tse, Ka-Lam Wong, Katherine Fan, Ying Wah Li, Woon-Leung Ng, Cheuk-Wan Yim, Cheuk-Hon John Wong, Lai-Shan Tam, Priscilla C H Wong, Chi-Yuen Wong, Chup-Hei Ho, Alexander M H Leung, Chi-Chiu Mok, Ho Lam, Chak-Sing Lau, Tommy Cheung, Carmen Ho, Sharon W Y Law, Esther W Chan, Li-Xue Yin, Wen-Sheng Yue, Toi Meng Mok, Mario Alberto Evora, Chung-Wah Siu
Current guideline-recommended screening for pulmonary hypertension in patients with systemic sclerosis has not been evaluated in systemic lupus erythematosus (SLE), which is disproportionately prevalent in Asians. This multicentre, cross-sectional screening study aims to study the prevalence of pulmonary hypertension among SLE patients using these guidelines, and identify independent predictors and develop a prediction model for pulmonary hypertension in SLE patients. SLE patients from participating centres will undergo an echocardiography- and biomarker-based pulmonary hypertension screening procedure as in the DETECT study...
January 2018: ERJ Open Research
Annisa Shui Lam Mak, Tommy Hing Cheung Tang, Kwok Wai Lam, Angie Lok Ming Kwok, Wah Cheuk, Tak Chiu Wu, Kwok Yin Leung
Termination of pregnancy is indicated for Serratia marcescens bacteremia, a major cause of mortality. Our present case was highly challenging because the patient wished to continue with her pregnancy, and the ultrasonography showed features of a placental abscess. Although the outcomes were good after prolonged antibiotic treatment, this was an exceptional case.
March 2018: Clinical Case Reports
Julie Hui-Chih Wu, Bradley J Langford, Kevin L Schwartz, Rosemary Zvonar, Sumit Raybardhan, Valerie Leung, Gary Garber
Background: Antimicrobial allergy labels, either self-reported or placed in a patient's medical record, are common, but in many cases they are not associated with a true immunoglobulin E-mediated allergic response. Objective: To assess the impact of antimicrobial allergy labels on antimicrobial prescribing, resource utilization, and clinical outcomes. Data Sources: The MEDLINE, Embase, CINAHL, and Scopus electronic databases were searched for the period 1990 to January 2016...
January 2018: Canadian Journal of Hospital Pharmacy
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