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https://www.readbyqxmd.com/read/28203068/ectopic-fat-accumulation-in-patients-with-copd-an-eclipse-substudy
#1
Mickaël Martin, Natalie Almeras, Jean-Pierre Després, Harvey O Coxson, George R Washko, Isabelle Vivodtzev, Emiel Fm Wouters, Erica Rutten, Michelle C Williams, John T Murchison, William MacNee, Don D Sin, François Maltais
BACKGROUND: Obesity is increasingly associated with COPD, but little is known about the prevalence of ectopic fat accumulation in COPD and whether this can possibly be associated with poor clinical outcomes and comorbidities. The Evaluation of COPD Longitudinally to Identify Predictive Surrogate Endpoints (ECLIPSE) substudy tested the hypothesis that COPD is associated with increased ectopic fat accumulation and that this would be associated with COPD-related outcomes and comorbidities...
2017: International Journal of Chronic Obstructive Pulmonary Disease
https://www.readbyqxmd.com/read/28201957/chilean-men-exposed-to-the-major-earthquake-in-2010
#2
Oscar Labra, Danielle Maltais, Gilles Tremblay
The article presents the results of a study involving 18 men, 4 years after one of South America's most powerful natural disasters: An earthquake occurring off the coast of Chile in February 2010. Participants reported having developed new psychological health problems in the months following the catastrophe. The manifestations most frequently reported by participants were the presence of depressive and stress symptoms, as well as sleep disorders. The majority of participants registered scores of 33 and above on the Impact of Event Scale-Revised, indicating that they were suffering from posttraumatic stress...
March 2017: American Journal of Men's Health
https://www.readbyqxmd.com/read/28197323/novel-2-substituted-7-azaindole-and-7-azaindazole-analogues-as-potential-antiviral-agents-for-the-treatment-of-influenza
#3
Upul K Bandarage, Michael P Clark, Emanuele Perola, Huai Gao, Marc D Jacobs, Alice Tsai, Jeffery Gillespie, Joseph M Kennedy, François Maltais, Mark W Ledeboer, Ioana Davies, Wenxin Gu, Randal A Byrn, Kwame Nti Addae, Hamilton Bennett, Joshua R Leeman, Steven M Jones, Colleen O'Brien, Christine Memmott, Youssef Bennani, Paul S Charifson
JNJ-63623872 (2) is a first-in-class, orally bioavailable compound that offers significant potential for the treatment of pandemic and seasonal influenza. Early lead optimization efforts in our 7-azaindole series focused on 1,3-diaminocyclohexyl amide and urea substitutions on the pyrimidine-7-azaindole motif. In this work, we explored two strategies to eliminate observed aldehyde oxidase (AO)-mediated metabolism at the 2-position of these 7-azaindole analogues. Substitution at the 2-position of the azaindole ring generated somewhat less potent analogues, but reduced AO-mediated metabolism...
February 9, 2017: ACS Medicinal Chemistry Letters
https://www.readbyqxmd.com/read/28182747/investigation-of-the-in-vitro-and-in-vivo-efficiency-of-rm-532-105-a-17%C3%AE-hydroxysteroid-dehydrogenase-type-3-inhibitor-in-lapc-4-prostate-cancer-cell-and-tumor-models
#4
Lucie Carolle Kenmogne, Jenny Roy, René Maltais, Mélanie Rouleau, Bertrand Neveu, Frédéric Pouliot, Donald Poirier
In the fight against androgen-sensitive prostate cancer, the enzyme 17β-hydroxysteroid dehydrogenase type 3 (17β-HSD3) is an attractive therapeutic target considering its key role in the formation of androgenic steroids. In this study, we attempted to assess the in vivo efficacy of the compound RM-532-105, an androsterone derivative developed as an inhibitor of 17β-HSD3, in the prostate cancer model of androgen-sensitive LAPC-4 cells xenografted in nude mice. RM-532-105 did not inhibit the tumor growth induced by 4-androstene-3,17-dione (4-dione); rather, the levels of the androgens testosterone (T) and dihydrotestosterone (DHT) increased within the tumors...
2017: PloS One
https://www.readbyqxmd.com/read/28153203/the-importance-of-mitral-regurgitation-in-patients-with-left%C3%A2-ventricular-assist-devices-an-ongoing-conundrum
#5
EDITORIAL
Simon Maltais, Lucman A Anwer
No abstract text is available yet for this article.
February 2017: JACC. Heart Failure
https://www.readbyqxmd.com/read/28125463/percutaneous-driveline-fracture-following-implantation-of-the-heartmate-ii-left-ventricular-assist-device-how-durable-is-driveline-repair
#6
John M Stulak, Sarah Schettle, Nicholas Haglund, Shannon Dunlay, Jennifer Cowger, Palak Shah, Keith D Aaronson, Francis D Pagani, Simon Maltais
Durability of the percutaneous driveline is critical for the optimal long-term support of patients after left ventricular assist device (LVAD) implantation. There are no data specifically examining the durability of major repair for driveline fracture or its effect on patient outcomes.Between May 2004 and August 2014, 560 patients underwent implantation with the HeartMate II LVAD at our respective institutions. Median age at LVAD implantation was 59 years (range, 18-82 years) and 465 patients (83%) were male...
January 23, 2017: ASAIO Journal: a Peer-reviewed Journal of the American Society for Artificial Internal Organs
https://www.readbyqxmd.com/read/28114196/early-gains-in-renal-function-following-implantation-of-heartmate-ii-left-ventricular-assist-devices-may-not-persist-to-one-year
#7
Tal Hasin, Avishay Grupper, John J Dillon, Joseph J Maleszewski, Zhuo Li, Yan Topilsky, Robert P Frantz, Brooks S Edwards, Naveen L Pereira, Simon Maltais, John M Stulak, Lyle Joyce, Richard Daly, Soon J Park, Sudhir S Kushwaha
Renal function improves early after left ventricular assist device (LVAD) implantation but later decline has been observed. We sought to determine the occurrence and evaluate possible causes for this decline. In 62 consecutive patients with HeartMateII LVAD with available calculated glomerular filtration rate (GFR, ml/min/1.73m) one year after implant, GFR was assessed repeatedly and possible predictors for decline from 3 to 12 months were investigated. Post-mortem renal specimens for patients supported with an LVAD were evaluated...
January 19, 2017: ASAIO Journal: a Peer-reviewed Journal of the American Society for Artificial Internal Organs
https://www.readbyqxmd.com/read/28087105/left-ventricular-assist-device-outcomes-based-on-flow-configuration-and-pre-operative-left-ventricular-dimension-an-interagency-registry-for-mechanically-assisted-circulatory-support-analysis
#8
Palak Shah, Sarah Birk, Simon Maltais, John Stulak, Angelo Elmi, Francis D Pagani, Jennifer A Cowger
BACKGROUND: Axial configuration (AC) and centrifugal configuration (CC) left ventricular assist devices (LVAD) have different flow characteristics, and whether the interaction between device flow configuration and the pre-operative left ventricular internal diastolic diameter (LVIDD) mediates adverse events after LVAD implantation is unknown. METHODS: We queried 9,424 continuous-flow LVAD recipients who received LVADs from April 2008 to June of 2015 in the Interagency Registry for Mechanically Assisted Circulatory Support (INTERMACS)...
December 16, 2016: Journal of Heart and Lung Transplantation
https://www.readbyqxmd.com/read/28069009/multi-center-randomized-placebo-controlled-trial-of-nocturnal-oxygen-therapy-in-chronic-obstructive-pulmonary-disease-a-study-protocol-for-the-inox-trial
#9
Yves Lacasse, Sarah Bernard, Frédéric Sériès, Van Hung Nguyen, Jean Bourbeau, Shawn Aaron, François Maltais
BACKGROUND: Long-term oxygen therapy (LTOT) is the only component of the management of chronic obstructive pulmonary disease (COPD) that improves survival in patients with severe daytime hypoxemia. LTOT is usually provided by a stationary oxygen concentrator and is recommended to be used for at least 15-18 h a day. Several studies have demonstrated a deterioration in arterial blood gas pressures and oxygen saturation during sleep in patients with COPD, even in those not qualifying for LTOT...
January 9, 2017: BMC Pulmonary Medicine
https://www.readbyqxmd.com/read/28060448/design-of-a-mestranol-2-n-piperazino-substituted-derivative-showing-potent-and-selective-in%C3%A2-vitro-and-in%C3%A2-vivo-activities-in-mcf-7-breast-cancer-models
#10
Martin Perreault, René Maltais, Jenny Roy, Raphaël Dutour, Donald Poirier
Anticancer structure-activity relationship studies on aminosteroid (5α-androstane) derivatives have emerged with a promising lead candidate: RM-133 (2β-[1-(quinoline-2-carbonyl)pyrrolidine-2-carbonyl]-N-piperazine-5α-androstane-3α,17β-diol), which possesses high in vitro and in vivo activities against several cancer cells, and selectivity over normal cells. However, the relatively weak metabolic stability of RM-133 has been a drawback to its progression toward clinical trials. We investigated the replacement of the androstane backbone by a more stable mestranol moiety...
January 6, 2017: ChemMedChem
https://www.readbyqxmd.com/read/28012643/reoperation-for-coronary-artery-bypass-grafting-surgery-outcomes-and-considerations-for-expanding-interventional-procedures
#11
Simon Maltais, Robert J Widmer, Malcolm R Bell, Richard C Daly, Joseph A Dearani, Kevin L Greason, David L Joyce, Lyle D Joyce, Hartzell V Schaff, John M Stulak
BACKGROUND: Owing to an inevitable degeneration of grafts over time, patients may require consideration for repeat coronary artery bypass graft (CABG) surgery. As our understanding of preoperative risks associated with redo CABG surgery is limited and availability of data is limited to historical cohorts, we sought to evaluate our contemporary 20-year experience with this challenging patient population. METHODS: Between January 1993 and June 2014, 748 patients underwent redo CABG surgery at our institution...
December 21, 2016: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/27942208/three-minute-constant-rate-step-test-for-detecting-exertional-dyspnea-relief-after-bronchodilation-in-copd
#12
Benoit Borel, Courtney A Wilkinson-Maitland, Alan Hamilton, Jean Bourbeau, Hélène Perrault, Dennis Jensen, François Maltais
BACKGROUND: The aim of this study was to evaluate the responsiveness of the 3-minute constant rate step test (3-MST) to detect the relief of exertional dyspnea (respiratory discomfort) after acute bronchodilation in COPD patients. PATIENTS AND METHODS: A total of 40 patients with moderate-to-severe COPD (mean forced expiratory volume in 1 second: 45.7 (±14.7), % predicted) performed four 3-MSTs at randomly assigned stepping rates of 14, 16, 20 and 24 steps/min after inhalation of nebulized ipratropium bromide (500 µg)/salbutamol (2...
2016: International Journal of Chronic Obstructive Pulmonary Disease
https://www.readbyqxmd.com/read/27932265/ottawa-panel-evidence-based-clinical-practice-guidelines-for-structured-physical-activity-in-the-management-of-juvenile-idiopathic-arthritis
#13
REVIEW
Sabrina Cavallo, Lucie Brosseau, Karine Toupin-April, George A Wells, Christine A Smith, Arlanna G Pugh, Jennifer Stinson, Roanne Thomas, Sara Ahmed, Ciarán M Duffy, Prinon Rahman, Inmaculada C Àlvarez-Gallardo, Laurianne Loew, Gino De Angelis, Debbie Ehrmann Feldman, Annette Majnemer, Isabelle J Gagnon, Désirée Maltais, Marie-Ève Mathieu, Glen P Kenny, Susan Tupper, Kristi Whitney-Mahoney, Sarah Bigford
OBJECTIVE: To create guidelines focused on the use of structured physical activity (PA) in the management of juvenile idiopathic arthritis (JIA). DATA SOURCES: A systematic literature search was conducted using the electronic databases Cochrane Central Register of Controlled Trials, MEDLINE (Ovid), EMBASE (Ovid), and Physiotherapy Evidence Database for all studies related to PA programs for JIA from January 1966 until December 2014, and was updated in May 2015...
December 6, 2016: Archives of Physical Medicine and Rehabilitation
https://www.readbyqxmd.com/read/27865732/prevention-of-heartmate-ii-pump-thrombosis-through-clinical-management-the-prevent-multi-center-study
#14
Simon Maltais, Ahmet Kilic, Sriram Nathan, Mary Keebler, Sitaramesh Emani, John Ransom, Jason N Katz, Brett Sheridan, Andreas Brieke, Gregory Egnaczyk, John W Entwistle, Robert Adamson, John Stulak, Nir Uriel, John B O'Connell, David J Farrar, Kartik S Sundareswaran, Igor Gregoric
BACKGROUND: Recommended structured clinical practices including implant technique, anti-coagulation strategy, and pump speed management (PREVENT [PREVENtion of HeartMate II Pump Thrombosis Through Clinical Management] recommendations) were developed to address risk of early (<3 months) pump thrombosis (PT) risk with HeartMate II (HMII; St. Jude Medical, Inc. [Thoratec Corporation], Pleasanton, CA). We prospectively assessed the HMII PT rate in the current era when participating centers adhered to the PREVENT recommendations...
January 2017: Journal of Heart and Lung Transplantation
https://www.readbyqxmd.com/read/27865723/mechanisms-of-effort-intolerance-in-patients-with-rheumatic-mitral-stenosis-combined-echocardiography-and-cardiopulmonary-stress%C3%A2-protocol
#15
Michal Laufer-Perl, Yaniv Gura, Jason Shimiaie, Jack Sherez, Gregg S Pressman, Galit Aviram, Simon Maltais, Ricki Megidish, Amir Halkin, Meirav Ingbir, Simon Biner, Gad Keren, Yan Topilsky
OBJECTIVES: This study sought to evaluate mechanisms of effort intolerance in patients with rheumatic mitral stenosis (MS). BACKGROUND: Combined stress echocardiography and cardiopulmonary testing allows assessment of cardiac function, hemodynamics, and oxygen extraction (A-Vo2 difference). METHODS: Using semirecumbent bicycle exercise, 20 patients with rheumatic MS (valve area 1.36 ± 0.4 cm(2)) were compared to 20 control subjects at 4 pre-defined activity stages (rest, unloaded, anaerobic threshold, and peak)...
November 10, 2016: JACC. Cardiovascular Imaging
https://www.readbyqxmd.com/read/27861566/findings-on-thoracic-computed-tomography-scans-and-respiratory-outcomes-in-persons-with-and-without-chronic-obstructive-pulmonary-disease-a-population-based-cohort-study
#16
Wan C Tan, Cameron J Hague, Jonathon Leipsic, Jean Bourbeau, Liyun Zheng, Pei Z Li, Don D Sin, Harvey O Coxson, Miranda Kirby, James C Hogg, Rekha Raju, Jeremy Road, Denis E O'Donnell, Francois Maltais, Paul Hernandez, Robert Cowie, Kenneth R Chapman, Darcy D Marciniuk, J Mark FitzGerald, Shawn D Aaron
BACKGROUND: Thoracic computed tomography (CT) scans are widely performed in clinical practice, often leading to detection of airway or parenchymal abnormalities in asymptomatic or minimally symptomatic individuals. However, clinical relevance of CT abnormalities is uncertain in the general population. METHODS: We evaluated data from 1361 participants aged ≥40 years from a Canadian prospective cohort comprising 408 healthy never-smokers, 502 healthy ever-smokers, and 451 individuals with spirometric evidence of chronic obstructive pulmonary disease (COPD) who had thoracic CT scans...
2016: PloS One
https://www.readbyqxmd.com/read/27859590/miz-1-and-max-compete-to-engage-c-myc-implication-for-the-mechanism-of-inhibition-of-c-myc-transcriptional-activity-by-miz-1
#17
Mikaël Bédard, Loïka Maltais, Martin Montagne, Pierre Lavigne
c-Myc is a basic helix-loop-helix leucine zipper (b-HLH-LZ) transcription factor deregulated in the majority of human cancers. As a heterodimer with Max, another b-HLH-LZ transcription factor, deregulated and persistent c-Myc accumulates at transcriptionally active promoters and enhancers and amplifies transcription. This leads to the so-called transcriptional addiction of tumor cells. Recent studies have showed that c-Myc transcriptional activities can be reversed by its association with Miz-1, a POZ transcription factor containing 13 classical zinc fingers...
November 16, 2016: Proteins
https://www.readbyqxmd.com/read/27834608/factors-associated-with-moderate-to-vigorous-physical-activity-in-adolescents-born-preterm
#18
Ketsia Proulx, Annette Majnemer, Noémi Dahan-Oliel, Barbara Mazer, Line Nadeau, Kathleen Vanier, Désirée B Maltais
PURPOSE: Little is known about the physical activity of adolescents born prematurely. This study aimed to: 1) describe relationships between moderate to vigorous physical activity (MVPA) in adolescents born prematurely and various factors and, 2) compare their MVPA level to guidelines. METHODS: A secondary analysis was performed using data from 64 adolescents (16.1 ± 2.5 years old, born ≤29 weeks gestation; 57.8% girls). Time spent in MVPA was based on accelerometry data...
November 11, 2016: Pediatric Exercise Science
https://www.readbyqxmd.com/read/27794080/automatic-oxygen-titration-during-walking-in-subjects-with-copd-a-randomized-crossover-controlled-study
#19
François Lellouche, Erwan L'Her, Pierre-Alexandre Bouchard, Cynthia Brouillard, François Maltais
BACKGROUND: Arterial oxygen desaturation frequently occurs in patients with COPD during daily activities at home. Oxygen flow is usually set at fixed and low rates for ambulatory patients. We evaluated an innovative closed-loop system (FreeO2) that automatically adjusts the oxygen flow to the patient's needs in subjects with COPD during walking followed by recovery time, such as during ambulatory conditions. METHODS: Patients with COPD who exhibited oxygen desaturation on exertion were included in the study...
November 2016: Respiratory Care
https://www.readbyqxmd.com/read/27793517/a-multi-institutional-outcome-analysis-of-patients-undergoing-left-ventricular-assist-device-implantation-stratified-by-sex-and-race
#20
Justin van Meeteren, Simon Maltais, Shannon M Dunlay, Nicholas A Haglund, Mary Beth Davis, Jennifer Cowger, Palak Shah, Keith D Aaronson, Francis D Pagani, John M Stulak
BACKGROUND: Earlier studies have demonstrated disparities in patients undergoing left ventricular assist device (LVAD) implantation when stratified according to sex and race. Because very few data exist from large investigations, we reviewed data from the registry of the Mechanical Circulatory Support Research Network. METHODS: Between May 2004 and September 2014, 734 patients underwent primary LVAD implantation at our institutions. Median age at implant was 57 (range 18 to 82) years and there were 577 males (80%)...
January 2017: Journal of Heart and Lung Transplantation
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