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https://www.readbyqxmd.com/read/28919509/molecular-and-macro-scale-analysis-of-enzyme-crosslinked-silk-hydrogels-for-rational-biomaterial-design
#1
Meghan McGill, Jeannine M Coburn, Benjamin P Partlow, Xuan Mu, David L Kaplan
Silk fibroin-based hydrogels have exciting applications in tissue engineering and therapeutic molecule delivery; however, their utility is dependent on their diffusive properties. The present study describes a molecular and macro-scale investigation of enzymatically-crosslinked silk fibroin hydrogels, and demonstrates that these systems have tunable crosslink density and diffusivity. We developed a liquid chromatography tandem mass spectroscopy (LC-MS/MS) method to assess the quantity and order of covalent tyrosine crosslinks in the hydrogels...
September 14, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28877953/anti-inflammatory-roles-of-p38%C3%AE-mapk-in-macrophages-are-context-dependent-and-require-il-10
#2
Abbas Raza, Jessica W Crothers, Mahalia M McGill, Gary M Mawe, Cory Teuscher, Dimitry N Krementsov
The p38 MAPK pathway was originally identified as a master regulator of proinflammatory cytokine production by myeloid cells. Numerous drugs targeting this kinase showed promise in preclinical models of inflammatory disease, but so far, none have shown efficacy in clinical trials. The reasons behind this are unclear, but may, in part, be explained by emerging anti-inflammatory functions of this kinase or overly refined selectivity of second-generation pharmacologic inhibitors. Here, we show that p38α signaling in macrophages plays pro- and anti-inflammatory functions in vivo and in vitro, with the outcome depending on the stimulus, output, kinetics, or mode of kinase inhibition (genetic vs...
September 6, 2017: Journal of Leukocyte Biology
https://www.readbyqxmd.com/read/28865749/differential-deregulation-of-ngf-and-bdnf-neurotrophins-in-a-transgenic-rat-model-of-alzheimer-s-disease
#3
M Florencia Iulita, M Beatriz Bistué Millón, Rowan Pentz, Lisi Flores Aguilar, Sonia Do Carmo, Simon Allard, Bernadeta Michalski, Edward N Wilson, Adriana Ducatenzeiler, Martin A Bruno, Margaret Fahnestock, A Claudio Cuello
Evidence from human neuropathological studies indicates that the levels of the neurotrophins nerve growth factor (NGF) and brain-derived neurotrophic factor (BDNF) are compromised in Alzheimer's disease. However, the causes and temporal (pathology-dependent) evolution of these alterations are not completely understood. To elucidate these issues, we investigated the McGill-R-Thy1-APP transgenic rat, which exhibits progressive intracellular and extracellular amyloid-beta (Aβ) pathology and ensuing cognitive deficits...
August 30, 2017: Neurobiology of Disease
https://www.readbyqxmd.com/read/28816143/radiation-therapy-versus-no-radiation-therapy-to-the-neo-breast-following-skin-sparing-mastectomy-and-immediate-autologous-free-flap-reconstruction-for-breast-cancer-patient-reported-and-surgical-outcomes-at-1-year-a-mastectomy-reconstruction-outcomes-consortium
#4
MULTICENTER STUDY
Andrew L Cooke, Julian Diaz-Abele, Tom Hayakawa, Ed Buchel, Kimberly Dalke, Pascal Lambert
PURPOSE: To determine whether adjuvant radiation therapy (RT) is associated with adverse patient-reported outcomes and surgical complications 1 year after skin-sparing mastectomy and immediate autologous free flap reconstruction for breast cancer. METHODS AND MATERIALS: We compared 24 domains of patient-reported outcome measures 1 year after autologous reconstruction between patients who received adjuvant RT and those who did not. A total of 125 patients who underwent surgery between 2012 and 2015 at our institution were included from the Mastectomy Reconstruction Outcomes Consortium study database...
September 1, 2017: International Journal of Radiation Oncology, Biology, Physics
https://www.readbyqxmd.com/read/28782021/community-level-regulation-of-temporal-trends-in-biodiversity
#5
Nicholas J Gotelli, Hideyasu Shimadzu, Maria Dornelas, Brian McGill, Faye Moyes, Anne E Magurran
Many theoretical models of community dynamics predict that species richness (S) and total abundance (N) are regulated in their temporal fluctuations. We present novel evidence for widespread regulation of biodiversity. For 59 plant and animal assemblages from around the globe monitored annually for a decade or more, the majority exhibited regulated fluctuations compared to the null hypothesis of an unconstrained random walk. However, there was little evidence for statistical artifacts, regulation driven by correlations with average annual temperature, or local-scale compensatory fluctuations in S or N...
July 2017: Science Advances
https://www.readbyqxmd.com/read/28754387/cost-of-cardiac-surgery-in-frail-compared-with-nonfrail-older-adults
#6
MULTICENTER STUDY
Michael Goldfarb, Melissa Bendayan, Lawrence G Rudski, Jean-Francois Morin, Yves Langlois, Felix Ma, Kevin Lachapelle, Renzo Cecere, Benoit DeVarennes, Christo I Tchervenkov, James M Brophy, Jonathan Afilalo
BACKGROUND: Frailty is a risk factor for mortality, morbidity, and prolonged length of stay after cardiac surgery, all of which are major drivers of hospitalization costs. The incremental hospitalization costs incurred in frail patients have yet to be elucidated. METHODS: Patients aged ≥ 60 years were evaluated for frailty before coronary artery bypass grafting or heart valve surgery at 2 academic centres between 2013 and 2015 as part of the McGill Frailty Registry...
August 2017: Canadian Journal of Cardiology
https://www.readbyqxmd.com/read/28713853/factors-associated-with-acute-postoperative-pain-following-breast-reconstruction
#7
Anita R Kulkarni, Andrea L Pusic, Jennifer B Hamill, Hyungjin M Kim, Ji Qi, Edwin G Wilkins, Randy S Roth
INTRODUCTION: Post-mastectomy breast reconstruction has become an increasingly important component of breast cancer treatment. Unfortunately, some patients experience severe postoperative pain, placing them at risk for increased clinical morbidity and the development of disabling chronic pain. In an attempt to identify at-risk patients, we prospectively evaluated patient characteristics and medical/surgical variables associated with more severe acute post-reconstruction pain. METHODS: Women (N = 2207; one-week 82...
March 2017: JPRAS Open
https://www.readbyqxmd.com/read/28709680/patient-satisfaction-with-laser-sintered-removable-partial-dentures-a-crossover-pilot-clinical-trial
#8
Balqees Almufleh, Elham Emami, Omar Alageel, Fabiana de Melo, Francois Seng, Eric Caron, Samer Abi Nader, Ashwaq Al-Hashedi, Rubens Albuquerque, Jocelyne Feine, Faleh Tamimi
STATEMENT OF PROBLEM: Clinical data regarding newly introduced laser-sintered removable partial dentures (RPDs) are needed before this technique can be recommended. Currently, only a few clinical reports have been published, with no clinical studies. PURPOSE: This clinical trial compared short-term satisfaction in patients wearing RPDs fabricated with conventional or computer-aided design and computer-aided manufacturing (CAD-CAM) laser-sintering technology. MATERIAL AND METHODS: Twelve participants with partial edentulism were enrolled in this pilot crossover double-blinded clinical trial...
July 11, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28693329/a-novel-approach-to-improving-patient-experience-in-orthopedics
#9
Spencer M Stein, Sarav S Shah, Alanna Carcich, Marlena McGill, Isaac Gammal, Michael Langino, Thomas Mauri
The patient experience domain comprises a significant portion of the Hospital Value-Based Purchasing program. This study investigated whether an intervention focusing on attending physician awareness, resident and physician assistant education, and multidisciplinary patient-centric care had an effect on patient perceived physician communication and overall hospital ratings. Responses to the Hospital Consumer Assessment of Healthcare Providers and Systems survey were reviewed in 2014 and 2015. Patients' perceptions that the physician explained their condition in ways they understood and the overall hospital rating improved significantly after implantation of the model ( P < ...
February 1, 2017: American Journal of Medical Quality: the Official Journal of the American College of Medical Quality
https://www.readbyqxmd.com/read/28684100/automaticity-of-force-application-during-simulated-brain-tumor-resection-testing-the-fitts-and-posner-model
#10
Abdulgadir Bugdadi, Robin Sawaya, Duaa Olwi, Gmaan Al-Zhrani, Hamed Azarnoush, Abdulrahman Jafar Sabbagh, Ghusn Alsideiri, Khalid Bajunaid, Fahad E Alotaibi, Alexander Winkler-Schwartz, Rolando Del Maestro
OBJECTIVE: The Fitts and Posner model of motor learning hypothesized that with deliberate practice, learners progress through stages to an autonomous phase of motor ability. To test this model, we assessed the automaticity of neurosurgeons, senior residents, and junior residents when operating on 2 identical tumors using the NeuroVR virtual reality simulation platform. DESIGN: Participants resected 9 identical simulated tumors on 2 occasions (total = 18 resections)...
July 3, 2017: Journal of Surgical Education
https://www.readbyqxmd.com/read/28670914/high-prevalence-of-chronic-pain-with-neuropathic-characteristics-after-open-reduction-and-internal-fixation-of-ankle-fractures
#11
Nadia Rbia, Cornelis H van der Vlies, Berry I Cleffken, Ruud W Selles, Steven E R Hovius, Tim H J Nijhuis
BACKGROUND: Unstable ankle fractures require treatment with open reduction and internal fixation (ORIF). Long-term functional outcome is satisfying in most patients; however, a number of patients have persistent complaints. Superficial nerve complications following ankle surgery may be the cause of chronic pain and disability. METHODS: In this observational retrospective survey, a cohort of 527 women and men, who underwent ORIF in the period from January 2007 to January 2014, were invited to an online questionnaire...
June 1, 2017: Foot & Ankle International
https://www.readbyqxmd.com/read/28643399/distributed-health-literacy-among-people-living-with-type-2-diabetes-in-portugal-defining-levels-of-awareness-and-support
#12
Liliana Abreu, João Arriscado Nunes, Peter Taylor, Susana Silva
This study embraces a patient-centred and narrative-oriented notion of health literacy, exploring how social networks and personal experiences constitute distributed health literacy (DHL) by mapping out health literacy mediators of each individual and how they enable self-management skills and knowledge of health conditions. Semi-structured interviews with 26 patients with type 2 diabetes were conducted in a Primary Care Center of Porto (Portugal) from October 2014 to December 2015. Data were collected based on McGill Illness Narrative Interview (MINI)...
June 22, 2017: Health & Social Care in the Community
https://www.readbyqxmd.com/read/28542317/systematic-review-of-dietary-salt-reduction-policies-evidence-for-an-effectiveness-hierarchy
#13
REVIEW
Lirije Hyseni, Alex Elliot-Green, Ffion Lloyd-Williams, Chris Kypridemos, Martin O'Flaherty, Rory McGill, Lois Orton, Helen Bromley, Francesco P Cappuccio, Simon Capewell
BACKGROUND: Non-communicable disease (NCD) prevention strategies now prioritise four major risk factors: food, tobacco, alcohol and physical activity. Dietary salt intake remains much higher than recommended, increasing blood pressure, cardiovascular disease and stomach cancer. Substantial reductions in salt intake are therefore urgently needed. However, the debate continues about the most effective approaches. To inform future prevention programmes, we systematically reviewed the evidence on the effectiveness of possible salt reduction interventions...
2017: PloS One
https://www.readbyqxmd.com/read/28533569/the-influence-of-concrete-support-on-child-welfare-program-engagement-progress-and-recurrence
#14
Whitney L Rostad, Tia McGill Rogers, Mark J Chaffin
Families living in poverty are significantly more likely to become involved with child welfare services, and consequently, referred to interventions that target abusive and neglectful parenting practices. Program engagement and retention are difficult to achieve, possibly because of the concrete resource insufficiencies that may have contributed to a family's involvement with services in the first place. Various strategies have been used to enhance program completion, such as motivational interventions, monetary incentives, and financial assistance with concrete needs...
January 2017: Children and Youth Services Review
https://www.readbyqxmd.com/read/28525607/rna-moip-prediction-of-rna-secondary-structure-and-local-3d-motifs-from-sequence-data
#15
Jason Yao, Vladimir Reinharz, François Major, Jérôme Waldisphül
RNA structures are hierarchically organized. The secondary structure is articulated around sophisticated local three-dimensional (3D) motifs shaping the full 3D architecture of the molecule. Recent contributions have identified and organized recurrent local 3D motifs, but applications of this knowledge for predictive purposes is still in its infancy. We recently developed a computational framework, named RNA-MoIP, to reconcile RNA secondary structure and local 3D motif information available in databases. In this paper, we introduce a web service using our software for predicting RNA hybrid 2D-3D structures from sequence data only...
May 19, 2017: Nucleic Acids Research
https://www.readbyqxmd.com/read/28502044/hippocampal-proteomic-analysis-reveals-distinct-pathway-deregulation-profiles-at-early-and-late-stages-in-a-rat-model-of-alzheimer-s-like-amyloid-pathology
#16
Sonia Do Carmo, Gogce Crynen, Tiffany Paradis, Jon Reed, M Florencia Iulita, Adriana Ducatenzeiler, Fiona Crawford, A Claudio Cuello
The cerebral accumulation and cytotoxicity of amyloid beta (Aβ) is central to Alzheimer's pathogenesis. However, little is known about how the amyloid pathology affects the global expression of brain proteins at different disease stages. In order to identify genotype and time-dependent significant changes in protein expression, we employed quantitative proteomics analysis of hippocampal tissue from the McGill-R-Thy1-APP rat model of Alzheimer-like amyloid pathology. McGill transgenic rats were compared to wild-type rats at early and late pathology stages, i...
May 13, 2017: Molecular Neurobiology
https://www.readbyqxmd.com/read/28485103/evaluating-a-novel-resident-role-modelling-programme
#17
Robert Sternszus, Yvonne Steinert, Farhan Bhanji, Sero Andonian, Linda S Snell
BACKGROUND: Role modelling is a fundamental method by which students learn from residents. To our knowledge, however, resident-as-teacher curricula have not explicitly addressed resident role modelling. The purpose of this project was to design, implement and evaluate an innovative programme to teach residents about role modelling. METHODS: The authors designed a resident role-modelling programme and incorporated it into the 2015 and 2016 McGill University resident-as-teacher curriculum...
May 9, 2017: Clinical Teacher
https://www.readbyqxmd.com/read/28480639/pyrimethamine-significantly-lowers-cerebrospinal-fluid-cu-zn-superoxide-dismutase-in-amyotrophic-lateral-sclerosis-patients-with-sod1-mutations
#18
MULTICENTER STUDY
Dale J Lange, Mona Shahbazi, Vincenzo Silani, Albert C Ludolph, Jochen H Weishaupt, Senda Ajroud-Driss, Kara G Fields, Rahul Remanan, Stanley H Appel, Claudia Morelli, Alberto Doretti, Luca Maderna, Stefano Messina, Ulrike Weiland, Stefan L Marklund, Peter M Andersen
OBJECTIVE: Cu/Zn superoxide dismutase (SOD1) reduction prolongs survival in SOD1-transgenic animal models. Pyrimethamine produces dose-dependent SOD1 reduction in cell culture systems. A previous phase 1 trial showed pyrimethamine lowers SOD1 levels in leukocytes in patients with SOD1 mutations. This study investigated whether pyrimethamine lowered SOD1 levels in the cerebrospinal fluid (CSF) in patients carrying SOD1 mutations linked to familial amyotrophic lateral sclerosis (fALS/SOD1)...
June 2017: Annals of Neurology
https://www.readbyqxmd.com/read/28479159/proteomic-analysis-of-filaggrin-deficiency-identifies-molecular-signatures-characteristic-of-atopic-eczema
#19
Martina S Elias, Heather A Long, Carla F Newman, Paul A Wilson, Andrew West, Paul J McGill, Keith C Wu, Michael J Donaldson, Nick J Reynolds
BACKGROUND: Atopic eczema (AE) is characterized by skin barrier and immune dysfunction. Null mutations in filaggrin (FLG), a key epidermal barrier protein, strongly predispose to AE; however, the precise role of FLG deficiency in AE pathogenesis remains incompletely understood. OBJECTIVES: We sought to identify global proteomic changes downstream of FLG deficiency in human epidermal living skin-equivalent (LSE) models and validate findings in skin of patients with AE...
April 28, 2017: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/28444736/selective-progesterone-receptor-modulators-sprms-for-uterine-fibroids
#20
REVIEW
Ally Murji, Lucy Whitaker, Tiffany L Chow, Mara L Sobel
BACKGROUND: Uterine fibroids are smooth muscle tumours arising from the uterus. These tumours, although benign, are commonly associated with abnormal uterine bleeding, bulk symptoms and reproductive dysfunction. The importance of progesterone in fibroid pathogenesis supports selective progesterone receptor modulators (SPRMs) as effective treatment. Both biochemical and clinical evidence suggests that SPRMs may reduce fibroid growth and ameliorate symptoms. SPRMs can cause unique histological changes to the endometrium that are not related to cancer, are not precancerous and have been found to be benign and reversible...
April 26, 2017: Cochrane Database of Systematic Reviews
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