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https://www.readbyqxmd.com/read/28526682/aeroallergens-induce-reactive-oxygen-species-production-and-dna-damage-and-dampen-antioxidant-responses-in-bronchial-epithelial-cells
#1
Tze Khee Chan, W S Daniel Tan, Hong Yong Peh, W S Fred Wong
Exposure to environmental allergens is a major risk factor for asthma development. Allergens possess proteolytic activity that is capable of disrupting the airway epithelium. Although there is increasing evidence pointing to asthma as an epithelial disease, the underlying mechanism that drives asthma has not been fully elucidated. In this study, we investigated the direct DNA damage potential of aeroallergens on human bronchial epithelial cells and elucidated the mechanisms mediating the damage. Human bronchial epithelial cells, BEAS-2B, directly exposed to house dust mites (HDM) resulted in enhanced DNA damage, as measured by the CometChip and the staining of DNA double-strand break marker, γH2AX...
May 19, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28523439/magnetic-resonance-imaging-of-painful-swollen-legs-in-the-emergency-department-a-pictorial-essay
#2
REVIEW
Ashish Chawla, Niraj Dubey, Kian Ming Chew, Dinesh Singh, Vishal Gaikwad, Wilfred Cg Peh
Patients presenting with a painful swollen leg are not infrequently encountered at the emergency department and can pose a diagnostic dilemma for attending physicians. The potential causes of leg pain and swelling include trauma, infection, inflammation, and neurogenic, vascular, and iatrogenic conditions; with magnetic resonance imaging (MRI) being an important tool in evaluation. We describe the MRI features of various conditions causing painful swollen legs. We also discuss the differential diagnosis and the useful clinical and laboratory findings that radiologists should be aware of, in order to arrive at an accurate diagnosis...
May 18, 2017: Emergency Radiology
https://www.readbyqxmd.com/read/28502463/greening-the-radiology-department-not-a-big-mountain-to-climb
#3
Ashish Chawla, Dinesh Chinchure, Laurel Owen Marchinkow, Peter L Munk, Wilfred C G Peh
An environmental-friendly radiology department should be a requirement of the future era. The aim of this article is to make radiologists aware of their responsibilities for a greener world. We have suggested a number of minor but important changes in various sections of a radiology department that can make the radiology department more environmentally friendly. These small steps require relatively little effort on our part but cumulatively, may have a huge positive impact on our environment.
May 11, 2017: Canadian Association of Radiologists Journal, Journal L'Association Canadienne des Radiologistes
https://www.readbyqxmd.com/read/28493161/primary-versus-redo-paraesophageal-hiatal-hernia-repair-a-comparative-analysis-of-operative-and-quality-of-life-outcomes
#4
H Reza Zahiri, Adam S Weltz, Udai S Sibia, Neethi Paranji, Steven D Leydorf, George T Fantry, Adrian E Park
INTRODUCTION: We compared patient outcomes after initial versus redo paraesophageal hernia (PEH) repair at two high-volume GI surgery centers. MATERIALS AND METHODS: Retrospective review analyzed one-year outcomes after initial versus redo elective laparoscopic PEH repair, including wound/non-wound-related complications and quality of life benefits as measured by four validated instruments: reflux symptom index, gastroesophageal reflux disease health-related, laryngopharyngeal reflux, and swallowing scales...
May 10, 2017: Surgical Endoscopy
https://www.readbyqxmd.com/read/28492357/long-term-effectiveness-of-strattice-in-the-laparoscopic-closure-of-paraesophageal-hernias
#5
Daniel Lomelin, Alicia Smith, Nathan Bills, Amareshewar Chiruvella, Christopher Crawford, Crystal Krause, Robert Bayer, Dmitry Oleynikov
Prosthetic reinforcement reduces the recurrence rate of large paraesophageal hernias (PEH), but the use of synthetic or biosynthetic mesh in the repair remains controversial. PEH repair has reported recurrence rates of 12% to 42%, and primary repair of PEH by suture closure under tension is at high risk of disruption. Synthetic mesh use in large PEH repair has shown to reduce recurrence but can lead to problems including mesh erosion, ulceration, stricture, and dysphagia. The objective of this study was to examine the long-term safety and efficacy of Strattice biologic mesh, a porcine acellular dermal matrix, in crural reinforcement of laparoscopic large PEH repair...
June 2017: Surgical Innovation
https://www.readbyqxmd.com/read/28490674/physical-form-of-dietary-fat-alters-postprandial-substrate-utilization-and-glycemic-response-in-healthy-chinese-men
#6
Sze-Yen Tan, Elaine Peh, Evelyn Lau, Alejandro G Marangoni, Christiani Jeyakumar Henry
Background: Dietary fats elicit various physiological responses, with the physical form of fat reported to alter fat digestion and absorption.Objectives: The primary aims were to compare the effects of dietary fat in 2 physical forms (liquid and oleogel) and 2 degrees of saturation (saturated and polyunsaturated) on postprandial energy expenditure (EE) and substrate oxidation, glycemia, and appetite.Methods: The study was a randomized, controlled crossover trial. Sixteen normal-weight, healthy Chinese men completed the study [mean ± SD age: 28 ± 6 y; body mass index (in kg/m(2)): 22...
May 10, 2017: Journal of Nutrition
https://www.readbyqxmd.com/read/28484816/paraesophageal-hernia-and-reflux-prevention-is-one-fundoplication-better-than-the-other
#7
REVIEW
Ciro Andolfi, Alejandro Plana, Sara Furno, Marco P Fisichella
BACKGROUND: The management of paraesophageal hernia (PEH) is one of the most debated in surgery. Trends regarding indications, approach (open, laparoscopic, thoracoscopic), sac excision, mesh placement, and routine performance of fundoplication have changed over time. Today, most surgeons tend to perform a laparoscopic PEH repair that entails the excision of the sac, liberal use of a mesh to buttress the hiatus, and the addition of an anti-reflux procedure. Nevertheless, very little has been written on which type of fundoplication should be performed in these patients...
May 8, 2017: World Journal of Surgery
https://www.readbyqxmd.com/read/28482361/acute-hypotension-after-high-intensity-interval-exercise-in-metabolic-syndrome-patients
#8
Felix Morales-Palomo, Miguel Ramirez-Jimenez, Juan Fernando Ortega, Jesús G Pallarés, Ricardo Mora-Rodriguez
The purpose of this study was to compare the magnitude of post-exercise hypotension (PEH) after a bout of cycling exercise using high-intensity interval training (HIIT) in comparison to a bout of traditional moderate-intensity continuous exercise (CE). After supine rest 14 obese (31±1 kg·m(-2)) middle-age (57±2 y) metabolic syndrome patients (50% hypertensive) underwent a bout of HIIT or a bout of CE in a random order and then returned to supine recovery for another 45 min. Exercise trials were isocaloric and compared to a no-exercise trial (CONT) of supine rest for a total of 160 min...
May 8, 2017: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/28465835/a-rabbit-model-study-to-determine-the-efficacy-of-a-prototype-corneal-endothelium-protector-during-cataract-surgery
#9
Annabel C Y Chew, Anita Chan, Monisha E Nongpiur, Gary Peh, Veluchamy A Barathi, Nyein C Lwin, Charles Ong, Shamira Perera
Purpose. We evaluated the efficacy and safety of a mechanical device, the P-chute, in corneal endothelium preservation during phacoemulsification in a rabbit model. Methods. Twenty-four rabbits were randomly assigned into 2 groups. One eye of each rabbit underwent phacoemulsification that simulated the removal of a dense nucleus, with or without the P-chute. Serial slit-lamp examinations, anterior segment optical coherence tomography (ASOCT) scans, and specular microscopy were performed. Three rabbits from each group were sacrificed on postoperative days (PODs) 1, 5, 7, and 14...
2017: Journal of Ophthalmology
https://www.readbyqxmd.com/read/28433224/the-importance-of-age-on-short-term-outcomes-associated-with-repair-of-giant-paraesophageal-hernias
#10
Mustapha A El Lakis, Stephen J Kaplan, Michal Hubka, Kamran Mohiuddin, Donald E Low
BACKGROUND: Older patients have an increased incidence of paraesophageal hernia (PEH) and can be denied surgical assessment due to the perception of increased complications and mortality. This study examines the influence of age and comorbidities on early complications and other short-term outcomes of PEH repair. METHODS: From 2000 to 2016, data of surgically treated patients with PEH were prospectively recorded in an Institutional Review Board-approved database...
June 2017: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/28413443/molecular-and-biochemical-characterization-of-recombinant-cel12b-cel8c-and-peh28-overexpressed-in-escherichia-coli-and-their-potential-in-biofuel-production
#11
Eman Ibrahim, Kim D Jones, Keith E Taylor, Ebtesam N Hosseney, Patrick L Mills, Jean M Escudero
BACKGROUND: The high crystallinity of cellulosic biomass myofibrils as well as the complexity of their intermolecular structure is a significant impediment for biofuel production. Cloning of celB-, celC-encoded cellulases (cel12B and cel8C) and peh-encoded polygalacturonase (peh28) from Pectobacterium carotovorum subsp. carotovorum (Pcc) was carried out in our previous study using Escherichia coli as a host vector. The current study partially characterizes the enzymes' molecular structures as well as their catalytic performance on different substrates which can be used to improve their potential for lignocellulosic biomass conversion...
2017: Biotechnology for Biofuels
https://www.readbyqxmd.com/read/28381645/effect-of-position-specific-single-point-mutations-%C3%A2-and-%C3%A2-biophysical-characterization-of-amyloidogenic-peptide-fragments-identified-from-lattice-corneal-dystrophy-%C3%A2-patients
#12
Venkatraman Anandalakshmi, Elavazhagan Murugan, Eunice Tze Leng Goh, Lim Wei Ting, Shyam S Chaurasia, Toshio Yamazaki, Toshio Nagashima, Benjamin Lawrence George, Gary Swee Lim Peh, Konstantin Pervushin, R Lakshminarayanan, Jodhbir S Mehta
Corneal stromal dystrophies are a group of genetic disorders that may be caused by mutations in the TGFBI gene which results in the aggregation and deposition of mutant proteins in various layers of the cornea. The type of amino acid substitution dictates the age of onset, anatomical location of the deposits, morphological features of deposits (amyloid, amorphous powder or a mixture of both forms) and the severity of disease presentation. It has been suggested that abnormal turn over and aberrant proteolytic processing of the mutant proteins results in the accumulation of insoluble protein deposits...
April 5, 2017: Biochemical Journal
https://www.readbyqxmd.com/read/28371647/emotion-dysregulation-as-a-mechanism-linking-child-maltreatment-exposure-and-self-harm-behaviors-in-adolescents
#13
Chao Xu Peh, Shazana Shahwan, Restria Fauziana, Mithila V Mahesh, Rajeswari Sambasivam, YunJue Zhang, Say How Ong, Siow Ann Chong, Mythily Subramaniam
Although child maltreatment exposure is a recognized risk factor for self-harm, mechanisms underlying this relationship remain unclear. Self-harm may function as a compensatory strategy to regulate distressing emotions. This cross-sectional study examines if emotion dysregulation mediates between the severity of maltreatment exposure and self-harm, adjusting for demographic variables and depressive symptoms. Participants were 108 adolescent patients recruited from a psychiatric hospital in Singapore (mean age 17...
May 2017: Child Abuse & Neglect
https://www.readbyqxmd.com/read/28364150/repair-of-symptomatic-paraesophageal-hernias-in-elderly-70%C3%A2-years-patients-results-in-sustained-quality-of-life-at-5%C3%A2-years-and-beyond
#14
Oleg V Merzlikin, Brian E Louie, Alexander S Farivar, Dale Shultz, Ralph W Aye
BACKGROUND: Paraesophageal hernias (PEHs) involve herniation of stomach and/or other viscera into the mediastinum. These commonly occur in the elderly and can severely limit quality of life. Short term outcomes of repaired PEH demonstrated low morbidity and significant improvement in quality of life, but long-term data for all patients, especially the elderly, are lacking. METHODS: Retrospective chart review of a prospectively collected database of patients aged 70 or greater with a symptomatic PEH repaired 5+ years ago...
March 31, 2017: Surgical Endoscopy
https://www.readbyqxmd.com/read/28361164/clinics-in-diagnostic-imaging-175-corpus-callosum-glioblastoma-multiforme-gbm-butterfly-glioma
#15
Vijay Krishnan, Tze Chwan Lim, Francis Cho Hao Ho, Wilfred Cg Peh
A 54-year-old man presented with change in behaviour, nocturnal enuresis, abnormal limb movement and headache of one week's duration. The diagnosis of butterfly glioma (glioblastoma multiforme) was made based on imaging characteristics and was further confirmed by biopsy findings. As the corpus callosum is usually resistant to infiltration by tumours, a mass that involves and crosses the corpus callosum is suggestive of an aggressive neoplasm. Other neoplastic and non-neoplastic conditions that may involve the corpus callosum and mimic a butterfly glioma, as well as associated imaging features, are discussed...
March 2017: Singapore Medical Journal
https://www.readbyqxmd.com/read/28329594/perforating-gout-of-the-ear
#16
Leigh Sutton, Palak Parekh
Gout is the most common cause of inflammatory arthritis in men over 40 [1]. The prevalence of gout in the US is approximately 3.9%. Tophus is a characteristic sign of gout and results when monosodium urate deposits at the joint, skin, or cartilage. Tophi develop in 12-35% of patients who are diagnosed with gout [2]. We report a case of a 70-year-old man who was diagnosed with squamous cell carcinoma of the helix via shave biopsy. During Mohs micrographic surgery, a vigorous foreign-body reaction was noted. Review of the initial biopsy slides identified crystals with pseudoepitheliomatous hyperplasia (PEH) rendering a diagnosis of gout...
October 15, 2016: Dermatology Online Journal
https://www.readbyqxmd.com/read/28320363/the-mediational-role-of-physical-activity-social-contact-and-stroke-on-the-association-between-age-education-employment-and-dementia-in-an-asian-older-adult-population
#17
Edimansyah Abdin, Siow Ann Chong, Chao Xu Peh, Janhavi Ajit Vaingankar, Boon Yiang Chua, Swapna Verma, Anitha Jeyagurunathan, Saleha Shafie, Mythily Subramaniam
BACKGROUND: Our study aimed to investigate the pathways by which socio-demographic factors, modifiable health and lifestyle risk factors influence each other, and subsequently, lead to dementia. METHODS: We used data from the Well-being of the Singapore Elderly study, a nationally representative survey of the older adult population aged 60 years and above in Singapore. Dementia diagnosis was established using 10/66 dementia criteria. Structural equation modelling (SEM) without latent variable was applied to confirm the hypothesized model...
March 20, 2017: BMC Psychiatry
https://www.readbyqxmd.com/read/28306719/chromosome-19q13-disruption-alters-expressions-of-cyp2a7-mia-and-mia-rab4b-lncrna-and-contributes-to-fap-like-phenotype-in-apc-mutation-negative-familial-colorectal-cancer-patients
#18
Lai Fun Thean, Yu Hui Wong, Michelle Lo, Carol Loi, Min Hoe Chew, Choong Leong Tang, Peh Yean Cheah
Familial adenomatous polyposis (FAP) is an autosomal-dominantly inherited form of colorectal cancer (CRC) caused by mutation in the adenomatous polyposis coli (APC) gene. Our ability to exhaustively screen for APC mutations identify microsatellite-stable and APC-mutation negative familial CRC patients, enabling us to search for novel genes. We performed genome-wide scan on two affected siblings of one family and 88 ethnicity- and gender-matched healthy controls to identify deletions shared by the siblings. Combined loss of heterozygosity, copy number and allelic-specific copy number analysis uncovered 5 shared deletions...
2017: PloS One
https://www.readbyqxmd.com/read/28291377/dual-energy-ct-applications-in-salivary-gland-lesions
#19
Ashish Chawla, Sivasubramanian Srinivasan, Tze-Chwan Lim, Geoiphy G Pulickal, Jagadish Shenoy, Wilfred C G Peh
The increasing availability of dual-energy CT (DECT) has set the stage for an exciting era in CT technology. This technique is extensively used throughout the world with numerous centres working on the applications of DECT in various radiology subspeciality areas. DECT provides many advantages over the conventional single-energy scan. Instead of a single set of images, radiologists have access to multiple sets of images from a single acquisition. The DECT workstation enables the reader to generate images, according to the clinical setting, in order to answer a specific clinical question...
April 26, 2017: British Journal of Radiology
https://www.readbyqxmd.com/read/28268070/post-carotid-endarterectomy-hypertension-part-1-association-with-pre-operative-clinical-imaging-and-physiological-parameters
#20
J E Newman, M J Bown, R D Sayers, J P Thompson, T G Robinson, B Williams, R Panerai, P Lacy, A R Naylor
OBJECTIVE/BACKGROUND: Post-endarterectomy hypertension (PEH) is a well recognised, but poorly understood, phenomenon after carotid endarterectomy (CEA) that is associated with post-operative intracranial haemorrhage, hyperperfusion syndrome, and cardiac complications. The aim of the current study was to identify pre-operative clinical, imaging, and physiological parameters associated with PEH. METHODS: In total, 106 CEA patients undergoing CEA under general anaesthesia underwent pre-operative evaluation of 24 hour ambulatory arterial blood pressure (BP), baroreceptor sensitivity, cerebral autoregulation, and transcranial Doppler measurement of cerebral blood flow velocity (CBFv) and pulsatility index...
March 3, 2017: European Journal of Vascular and Endovascular Surgery
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