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https://www.readbyqxmd.com/read/28210189/development-of-a-meso-scale-sma-based-torsion-actuator-for-image-guided-procedures
#1
Jun Sheng, Dheeraj Gandhi, Rao Gullapalli, J Marc Simard, Jaydev P Desai
This paper presents the design, modeling, and control of a meso-scale torsion actuator based on shape memory alloy (SMA) for image-guided surgical procedures. Developing a miniature torsion actuator is challenging, but it opens the possibility of significantly enhancing the robot agility and maneuverability. The proposed torsion actuator is bi-directionally actuated by a pair of antagonistic SMA torsion springs through alternate Joule heating and natural cooling. The torsion actuator is integrated into a surgical robot prototype to demonstrate its working performance in the humid environment under C-Arm CT image guidance...
February 2017: IEEE Transactions on Robotics: a Publication of the IEEE Robotics and Automation Society
https://www.readbyqxmd.com/read/28207975/stabilization-of-renal-function-after-the-first-year-of-follow-up-in-kidney-transplant-recipients-treated-for-significant-bk-polyomavirus-infection-or-bk-polyomavirus-associated-nephropathy
#2
Marie-Christine Simard-Meilleur, Paule Bodson-Clermont, Gilles St-Louis, Michel R Pâquet, Catherine Girardin, Marie-Chantal Fortin, Héloïse Cardinal, Marie-Josée Hébert, Reneé Lévesque, Edith Renoult
BACKGROUND: BK polyomavirus virus (BKPyV) screening and immunosuppression reduction effectively prevent graft loss due to BKPyV-associated nephropathy (BKPVAN) during the first year after transplantation. The aim of our study was to evaluate the impact of this infection during longer follow-up periods. METHODS: We reviewed the outcome of our screening and immunosuppression reduction protocol in 305 patients who received a kidney transplant between March 2008 and January 2013...
February 16, 2017: Transplant Infectious Disease: An Official Journal of the Transplantation Society
https://www.readbyqxmd.com/read/28180320/teg-1-cd2bp2-controls-mirna-levels-by-regulating-mirisc-stability-in-c-elegans-and-human-cells
#3
Chris Wang, Pratyush Gupta, Lucile Fressigne, Gabriel D Bossé, Xin Wang, Martin J Simard, Dave Hansen
No abstract text is available yet for this article.
February 17, 2017: Nucleic Acids Research
https://www.readbyqxmd.com/read/28178923/non-neuronal-cholinergic-activity-is-potentiated-in-myasthenia-gravis
#4
Bin Han, Chao Zhang, Shoufeng Liu, Yiping Xia, Hao Sun, Zhongying Gong, Alain R Simard, Qiang Liu, Junwei Hao
BACKGROUND: Non-neuronal acetylcholine (ACh) restricts autoimmune responses and attenuates inflammation by cholinergic anti-inflammation pathway. To date, the implication of ACh in myasthenia gravis (MG) remained unexplored. This study aimed to investigate the possible relationship between ACh levels, anti-muscle-specific tyrosine kinase (MuSK) antibody titers, main clinical features and outcomes of MG patients. METHODS: We successfully measured ACh levels in human peripheral blood mononuclear cells (PBMCs) from 125 MG patients and 50 matched healthy controls by using ultra-performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS)...
February 8, 2017: BMC Neurology
https://www.readbyqxmd.com/read/28172431/vexor-an-integrative-environment-for-prioritization-of-functional-variants-in-fine-mapping-analysis
#5
Audrey Lemaçon, Charles Joly Beauparlant, Penny Soucy, Jamie Allen, Douglas Easton, Peter Kraft, Jacques Simard, Arnaud Droit
No abstract text is available yet for this article.
January 5, 2017: Bioinformatics
https://www.readbyqxmd.com/read/28159969/targeted-metabolomics-reveals-early-dominant-optic-atrophy-signature-in-optic-nerves-of-opa1delttag-mice
#6
Juan Manuel Chao de la Barca, Gilles Simard, Emmanuelle Sarzi, Tanguy Chaumette, Guillaume Rousseau, Stéphanie Chupin, Cédric Gadras, Lydie Tessier, Marc Ferré, Arnaud Chevrollier, Valérie Desquiret-Dumas, Naïg Gueguen, Stéphanie Leruez, Christophe Verny, Dan Miléa, Dominique Bonneau, Patrizia Amati-Bonneau, Vincent Procaccio, Christian Hamel, Guy Lenaers, Pascal Reynier, Delphine Prunier-Mirebeau
Purpose: Dominant optic atrophy (MIM No. 165500) is a blinding condition related to mutations in OPA1, a gene encoding a large GTPase involved in mitochondrial inner membrane dynamics. Although several mouse models mimicking the disease have been developed, the pathophysiological mechanisms responsible for retinal ganglion cell degeneration remain poorly understood. Methods: Using a targeted metabolomic approach, we measured the concentrations of 188 metabolites in nine tissues, that is, brain, three types of skeletal muscle, heart, liver, retina, optic nerve, and plasma in symptomatic 11-month-old Opa1delTTAG/+ mice...
February 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/28158198/cerebral-microbleeds-in-a-neonatal-rat-model
#7
Brianna Carusillo Theriault, Seung Kyoon Woo, Jason K Karimy, Kaspar Keledjian, Jesse A Stokum, Amrita Sarkar, Turhan Coksaygan, Svetlana Ivanova, Volodymyr Gerzanich, J Marc Simard
BACKGROUND: In adult humans, cerebral microbleeds play important roles in neurodegenerative diseases but in neonates, the consequences of cerebral microbleeds are unknown. In rats, a single pro-angiogenic stimulus in utero predisposes to cerebral microbleeds after birth at term, a time when late oligodendrocyte progenitors (pre-oligodendrocytes) dominate in the rat brain. We hypothesized that two independent pro-angiogenic stimuli in utero would be associated with a high likelihood of perinatal microbleeds that would be severely damaging to white matter...
2017: PloS One
https://www.readbyqxmd.com/read/28151891/retrospective-study-of-intravascular-large-b-cell-lymphoma-cases-diagnosed-in-quebec-a-retrospective-study-of-29-case-reports
#8
Vanessa Brunet, Sofia Marouan, Jean-Pierre Routy, Mohamed Amin Hashem, Vincent Bernier, Raynald Simard, Tony Petrella, Louis Lamarre, Gilles Théorêt, Christian Carrier, Hans Knecht, Isabelle Fleury, Michel Pavic
INTRODUCTION: Intravascular large B-cell lymphoma (IVL) is an extremely rare malignancy, mainly studied through European and Asian series. Due to the low incidence of this condition, our understanding of the clinical presentation as well as the management of IVL relies on a limited number of patients.We report the largest North American study to date on IVL with 29 cases from Quebec hospital diagnosed between 1990 and 2016. The aim of our study is to describe the clinical presentations, diagnostic and staging procedures, therapeutic management and clinical outcomes of IVL patients in our population and compare the disease phenotype to European and Asian series reported...
February 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28107311/performance-of-international-classification-of-diseases-based-injury-severity-measures-used-to-predict-in-hospital-mortality-and-intensive-care-admission-among-traumatic-brain-injured-patients
#9
Mathieu Gagné, Lynne Moore, Marie-Josée Sirois, Marc Simard, Claudia Beaudoin, Brice Lionel Batomen Kuimi
BACKGROUND: The International Classification of Diseases (ICD) is the main classification system used for population-based traumatic brain injury (TBI) surveillance activities but does not contain direct information on injury severity. International Classification of Diseases-based injury severity measures can be empirically derived or mapped to the Abbreviated Injury Scale, but no single approach has been formally recommended for TBI. OBJECTIVE: The aim of this study was to compare the accuracy of different ICD-based injury severity measures for predicting in-hospital mortality and intensive care unit (ICU) admission in TBI patients...
February 2017: Journal of Trauma and Acute Care Surgery
https://www.readbyqxmd.com/read/28103955/mosquitoes-diptera-culicidae-in-mauritania-a-review-of-their-biodiversity-distribution-and-medical-importance
#10
REVIEW
Aichetou Mint Mohamed Lemine, Mohamed Aly Ould Lemrabott, Moina Hasni Ebou, Khadijetou Mint Lekweiry, Mohamed Salem Ould Ahmedou Salem, Khyarhoum Ould Brahim, Mohamed Ouldabdallahi Moukah, Issa Nabiyoullahi Ould Bouraya, Cecile Brengues, Jean-François Trape, Leonardo Basco, Hervé Bogreau, Frédéric Simard, Ousmane Faye, Ali Ould Mohamed Salem Boukhary
Although mosquitoes (Diptera: Culicidae) are important disease vectors, information on their biodiversity in Mauritania is scarce and very dispersed in the literature. Data from the scientific literature gathered in the country from 1948 to 2016 were collected and analyzed. Overall 51 culicid species comprising 17 Anopheles spp., 14 Aedes spp., 18 Culex spp. and two Mansonia spp. have been described in Mauritania among which Anopheles arabiensis, Aedes vexans, Culex poicilipes and Culex antennatus are of epidemiological significance...
January 19, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28094194/mabp1-as-a-novel-antibody-treatment-for-advanced-colorectal-cancer-a-randomised-double-blind-placebo-controlled-phase-3-study
#11
Tamas Hickish, Thierry Andre, Lucjan Wyrwicz, Mark Saunders, Tomasz Sarosiek, Judit Kocsis, Radim Nemecek, Wojciech Rogowski, Krzysztof Lesniewski-Kmak, Lubos Petruzelka, Ron N Apte, Prasant Mohanty, Michael Stecher, John Simard, Aimery de Gramont
BACKGROUND: MABp1, an antibody that targets interleukin 1α, has been associated with antitumour activity and relief of debilitating symptoms in patients with advanced colorectal cancer. We sought to establish the effect of MABp1 with a new primary endpoint in patients with advanced colorectal cancer. METHODS: Eligible patients for the double-blind phase of this ongoing, placebo-controlled, randomised, phase 3 trial, had metastatic or unresectable disease, Eastern Cooperative Oncology Group performance status score 1 or 2, systemic inflammation, weight loss, and other disease-related morbidities associated with poor prognosis, and were refractory to oxaliplatin and irinotecan...
February 2017: Lancet Oncology
https://www.readbyqxmd.com/read/28081518/development-of-a-biometric-method-to-estimate-age-on-hand-radiographs
#12
Floriane Remy, Gabriela Hossu, Romain Cendre, Emilien Micard, Laurence Mainard-Simard, Jacques Felblinger, Laurent Martrille, Loïc Lalys
Age estimation of living individuals aged less than 13, 18 or 21 years, which are some relevant legal ages in most European countries, is currently problematic in the forensic context. Thus, numerous methods are available for legal authorities, although their efficiency can be discussed. For those reasons, we aimed to propose a new method, based on the biometric analysis of hand bones. 451 hand radiographs of French individuals under the age of 21 were retrospectively analyzed. This total sample was divided into three subgroups bounded by the relevant legal ages previously mentioned: 0-13, 13-18 and 18-21 years...
February 2017: Forensic Science International
https://www.readbyqxmd.com/read/28079770/neurodevelopmental-outcomes-after-assisted-reproductive-technologies
#13
Jacques Balayla, Odile Sheehy, William D Fraser, Jean R Séguin, Jacquetta Trasler, Patricia Monnier, Andrea A MacLeod, Marie-Noëlle Simard, Gina Muckle, Anick Bérard
OBJECTIVE: To compare children's cognitive, motor, and language development at 2 years of age after assisted reproductive technologies (ARTs) relative to natural conception. METHODS: The 3D-Study (2010-2012) is a prospective cohort study, which sought to improve the understanding among perinatal events, obstetric outcomes, and child development. A total of 2,366 pregnant women were recruited, of whom 278 conceived with ART: ovarian stimulation, intrauterine sperm insemination, in vitro fertilization, intracytoplasmic sperm injection, or in vitro maturation...
February 2017: Obstetrics and Gynecology
https://www.readbyqxmd.com/read/28071788/chromosome-inversions-and-ecological-plasticity-in-the-main-african-malaria-mosquitoes
#14
Diego Ayala, Pelayo Acevedo, Marco Pombi, Ibrahima Dia, Daniela Boccolini, Carlo Costantini, Frédéric Simard, Didier Fontenille
Chromosome inversions have fascinated the scientific community, mainly because of their role in the rapid adaption of different taxa to changing environments. However, the ecological traits linked to chromosome inversions have been poorly studied. Here, we investigated the roles played by 23 chromosome inversions in the adaptation of the four major African malaria mosquitoes to local environments in Africa. We studied their distribution patterns by using spatially explicit modeling and characterized the ecogeographical determinants of each inversion range...
January 10, 2017: Evolution; International Journal of Organic Evolution
https://www.readbyqxmd.com/read/28050152/recommendations-on-breast-cancer-screening-and-prevention-in-the-context-of-implementing-risk-stratification-impending-changes-to-current-policies
#15
J Gagnon, E Lévesque, F Borduas, J Chiquette, C Diorio, N Duchesne, M Dumais, L Eloy, W Foulkes, N Gervais, L Lalonde, B L'Espérance, S Meterissian, L Provencher, J Richard, C Savard, I Trop, N Wong, B M Knoppers, J Simard
In recent years, risk stratification has sparked interest as an innovative approach to disease screening and prevention. The approach effectively personalizes individual risk, opening the way to screening and prevention interventions that are adapted to subpopulations. The international perspective project, which is developing risk stratification for breast cancer, aims to support the integration of its screening approach into clinical practice through comprehensive tool-building. Policies and guidelines for risk stratification-unlike those for population screening programs, which are currently well regulated-are still under development...
December 2016: Current Oncology
https://www.readbyqxmd.com/read/28049830/characterization-of-cytopathic-factors-through-genome-wide-analysis-of-the-zika-viral-proteins-in-fission-yeast
#16
Ge Li, Melissa Poulsen, Csaba Fenyvuesvolgyi, Yoko Yashiroda, Minoru Yoshida, J Marc Simard, Robert C Gallo, Richard Y Zhao
The Zika virus (ZIKV) causes microcephaly and the Guillain-Barré syndrome. Little is known about how ZIKV causes these conditions or which ZIKV viral protein(s) is responsible for the associated ZIKV-induced cytopathic effects, including cell hypertrophy, growth restriction, cell-cycle dysregulation, and cell death. We used fission yeast for the rapid, global functional analysis of the ZIKV genome. All 14 proteins or small peptides were produced under an inducible promoter, and we measured the intracellular localization and the specific effects on ZIKV-associated cytopathic activities of each protein...
January 17, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28045336/hyperglycaemia-in-comatose-survivors-of-out-of-hospital-cardiac-arrest
#17
Juan J Russo, Tyler E James, Benjamin Hibbert, F Daniel Ramirez, Trevor Simard, Christina Osborne, Jordan Bernick, George A Wells, Michel R Le May
BACKGROUND: The optimal blood glucose target during the early hospitalisation of comatose survivors of out-of-hospital cardiac arrest (OHCA) has not been established. METHODS: In a retrospective cohort study, we examined clinical outcomes in relation to mean blood glucose during the first 96 hours of hospital admission in comatose survivors of OHCA with an initial shockable rhythm. Mean blood glucose was assessed as a continuous (primary analysis) and categorical variable: <6 mmol/L, 6 to <8 mmol/L and ⩾8 mmol/L...
December 1, 2016: European Heart Journal. Acute Cardiovascular Care
https://www.readbyqxmd.com/read/28039412/cervical-neoplasia-in-systemic-lupus-erythematosus-a-nationwide-study
#18
Hjalmar Wadström, Elizabeth V Arkema, Christopher Sjöwall, Johan Askling, Julia F Simard
OBJECTIVE: The aim was to examine the risk of cervical neoplasia in women with SLE, overall and with respect to treatment, compared with women from the general population. METHODS: By linking national Swedish registers, we assembled a cohort including women with SLE (n = 4976) and matched general population comparators (n = 29 703). Two subcohorts of treated SLE patients were defined on the basis of treatment with antimalarials (n = 1942) and other immunosuppressants (AZA, CYC, ciclosporin, MTX, MMF or rituximab; n = 2175)...
December 30, 2016: Rheumatology
https://www.readbyqxmd.com/read/28033394/correction-gw182-free-microrna-silencing-complex-controls-post-transcriptional-gene-expression-during-caenorhabditis-elegans-embryogenesis
#19
Guillaume Jannot, Pascale Michaud, Miguel Quévillon Huberdeau, Louis Morel-Berryman, James A Brackbill, Sandra Piquet, Katherine McJunkin, Kotaro Nakanishi, Martin J Simard
[This corrects the article DOI: 10.1371/journal.pgen.1006484.].
December 2016: PLoS Genetics
https://www.readbyqxmd.com/read/28013193/medication-use-among-pregnant-women-with-systemic-lupus-erythematosus-and-general-population-comparators
#20
Kristin Palmsten, Julia F Simard, Christina D Chambers, Elizabeth V Arkema
OBJECTIVE: The aim was to characterize SLE medication trends before, during and after pregnancy and to compare other commonly used medications during SLE pregnancies with non-SLE pregnancies. METHODS: Women with pregnancies ending in live birth or stillbirth were identified from the Swedish Medical Birth Register (2006-12). National registers were used to identify women with prevalent SLE during pregnancy and a sample without SLE and to identify prescription medications dispensed from 3 months pre-pregnancy until 6 months postpartum...
December 24, 2016: Rheumatology
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