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Matthew Stephens

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https://www.readbyqxmd.com/read/29792594/an-nmdar-positive-and-negative-allosteric-modulator-series-share-a-binding-site-and-are-interconverted-by-methyl-groups
#1
Riley Perszyk, Brooke M Katzman, Hirofumi Kusumoto, Steven A Kell, Matthew P Epplin, Yesim A Tahirovic, Rhonda L Moore, David Menaldino, Pieter Burger, Dennis C Liotta, Stephen F Traynelis
N-methyl-d-aspartate receptors (NMDARs) are an important receptor in the brain and have been implicated in multiple neurological disorders. Many non-selective NMDAR-targeting drugs are poorly tolerated, leading to efforts to target NMDAR subtypes to improve the therapeutic index. We describe here a series of negative allosteric NMDAR modulators with submaximal inhibition at saturating concentrations. Modest changes to the chemical structure interconvert negative and positive modulation. All modulators share the ability to enhance agonist potency and are use-dependent, requiring the binding of both agonists before modulators act with high potency...
May 24, 2018: ELife
https://www.readbyqxmd.com/read/29789283/safety-of-medicines-delivered-by-homecare-companies
#2
EDITORIAL
Anthony Matthews, Liam J Donaldson, Stephen J Evans, Sinéad M Langan
No abstract text is available yet for this article.
May 22, 2018: BMJ: British Medical Journal
https://www.readbyqxmd.com/read/29780840/radial-tears-of-the-lateral-meniscus-two-novel-repair-techniques-a-biomechanical-study
#3
Zachary C Stender, Allison M Cracchiolo, Michael P Walsh, David P Patterson, Matthew J Wilusz, Stephen E Lemos
Background: A common treatment for radial tears of the meniscus has historically been partial meniscectomy. Owing to the poor outcomes associated with partial meniscectomy, repair of the meniscus is an important treatment option. It is important to evaluate different repair techniques for radial tears of the meniscus. Purpose/Hypothesis: The purpose of this study was to evaluate 2 novel techniques to repair radial tears of the lateral meniscus. The 2 techniques were compared biomechanically with the cross-suture method with an inside-out technique...
April 2018: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/29779563/association-of-polygenic-risk-scores-for-multiple-cancers-in-a-phenome-wide-study-results-from-the-michigan-genomics-initiative
#4
Lars G Fritsche, Stephen B Gruber, Zhenke Wu, Ellen M Schmidt, Matthew Zawistowski, Stephanie E Moser, Victoria M Blanc, Chad M Brummett, Sachin Kheterpal, Gonçalo R Abecasis, Bhramar Mukherjee
Health systems are stewards of patient electronic health record (EHR) data with extraordinarily rich depth and breadth, reflecting thousands of diagnoses and exposures. Measures of genomic variation integrated with EHRs offer a potential strategy to accurately stratify patients for risk profiling and discover new relationships between diagnoses and genomes. The objective of this study was to evaluate whether polygenic risk scores (PRS) for common cancers are associated with multiple phenotypes in a phenome-wide association study (PheWAS) conducted in 28,260 unrelated, genotyped patients of recent European ancestry who consented to participate in the Michigan Genomics Initiative, a longitudinal biorepository effort within Michigan Medicine...
May 17, 2018: American Journal of Human Genetics
https://www.readbyqxmd.com/read/29778787/efficacy-of-palbociclib-combinations-in-hormone-receptor-positive-metastatic-breast-cancer-patients-after-prior-everolimus-treatment
#5
Ajay Dhakal, Christina M Matthews, Ellis Glenn Levine, Kilian Elizabeth Salerno, Fan Zhang, Kazuaki Takabe, Amy P Early, Stephen B Edge, Tracy O'Connor, Thaer Khoury, Jessica S Young, Mateusz Opyrchal
PURPOSE: Outcome data on hormone receptor positive (HR+ ), human epidermal growth factor receptor 2 (HER2) nonamplified (HER2- ) metastatic breast cancer (MBC) treated with palbociclib after treatment with everolimus are lacking. The PALOMA-3 trial, showing benefit of palbociclib plus fulvestrant compared to fulvestrant alone in HR+ HER2- MBC after progression while receiving endocrine therapy excluded women previously treated with everolimus. The objective of this study was to examine outcomes of HR+ HER2- MBC with prior exposure to everolimus while receiving palbociclib-based therapy...
April 28, 2018: Clinical Breast Cancer
https://www.readbyqxmd.com/read/29778349/a-contemporary-prostate-biopsy-risk-calculator-based-on-multiple-heterogeneous-cohorts
#6
Donna P Ankerst, Johanna Straubinger, Katharina Selig, Lourdes Guerrios, Amanda De Hoedt, Javier Hernandez, Michael A Liss, Robin J Leach, Stephen J Freedland, Michael W Kattan, Robert Nam, Alexander Haese, Francesco Montorsi, Stephen A Boorjian, Matthew R Cooperberg, Cedric Poyet, Emily Vertosick, Andrew J Vickers
BACKGROUND: Prostate cancer prediction tools provide quantitative guidance for doctor-patient decision-making regarding biopsy. The widely used online Prostate Cancer Prevention Trial Risk Calculator (PCPTRC) utilized data from the 1990s based on six-core biopsies and outdated grading systems. OBJECTIVE: We prospectively gathered data from men undergoing prostate biopsy in multiple diverse North American and European institutions participating in the Prostate Biopsy Collaborative Group (PBCG) in order to build a state-of-the-art risk prediction tool...
May 16, 2018: European Urology
https://www.readbyqxmd.com/read/29775282/confined-liquid-phase-growth-of-crystalline-compound-semiconductors-on-any-substrate
#7
Debarghya Sarkar, Wei Wang, Matthew Mecklenburg, Andrew J Clough, Matthew Yeung, Chenhao Ren, Qingfeng Lin, Louis Blankemeier, Shanyuan Niu, Huan Zhao, Haotian Shi, Han Wang, Stephen B Cronin, Jayakanth Ravichandran, Mitul Luhar, Rehan Kapadia
The growth of crystalline compound semiconductors on amorphous and non-epitaxial substrates is a fundamental challenge for state-of-the-art thin-film epitaxial growth techniques. Direct growth of materials on technologically relevant amorphous surfaces, such as nitrides or oxides results in nanocrystalline thin-films, or nanowire type structures, preventing growth and integration of high-performance devices and circuits on these surfaces. Here we show crystalline compound semiconductors grown directly on technologically relevant amorphous and non-epitaxial substrates in geometries compatible with standard microfabrication technology...
May 18, 2018: ACS Nano
https://www.readbyqxmd.com/read/29773717/stk11-lkb1-mutations-and-pd-1-inhibitor-resistance-in-kras-mutant-lung-adenocarcinoma
#8
Ferdinandos Skoulidis, Michael E Goldberg, Danielle M Greenawalt, Matthew D Hellmann, Mark M Awad, Justin F Gainor, Alexa B Schrock, Ryan J Hartmaier, Sally E Trabucco, Laurie Gay, Siraj M Ali, Julia A Elvin, Gaurav Singal, Jeffrey S Ross, David Fabrizio, Peter M Szabo, Han Chang, Ariella Sasson, Sujaya Srinivasan, Stefan Kirov, Joseph Szustakowski, Patrik Vitazka, Robin Edwards, Jose A Bufill, Neelesh Sharma, Sai-Hong I Ou, Nir Peled, David R Spigel, Hira Rizvi, Elizabeth Jimenez Aguilar, Brett W Carter, Jeremy Erasmus, Darragh F Halpenny, Andrew J Plodkowski, Niamh M Long, Mizuki Nishino, Warren L Denning, Ana Galan-Cobo, Haifa Hamdi, Taghreed Hirz, Pan Tong, Jing Wang, Jaime Rodriguez-Canales, Pamela A Villalobos, Edwin R Parra, Neda Kalhor, Lynette M Sholl, Jennifer L Sauter, Achim A Jungbluth, Mari Mino-Kenudson, Roxana Azimi, Yasir Y Elamin, Jianjun Zhang, Giulia C Leonardi, Fei Jiang, Kwok-Kin Wong, J Jack Lee, Vassiliki A Papadimitrakopoulou, Ignacio I Wistuba, Vincent A Miller, Garrett M Frampton, Jedd D Wolchok, Alice T Shaw, Pasi A Jänne, Philip J Stephens, Charles M Rudin, William J Geese, Lee A Albacker, John V Heymach
KRAS is the most common oncogenic driver in lung adenocarcinoma (LUAC). We previously reported that STK11/LKB1 (KL) or TP53 (KP) co-mutations define distinct subgroups of KRAS-mutant LUAC. Here, we examine the efficacy of PD-1 inhibitors in these subgroups. Objective response rates to PD-1 blockade differed significantly among KL (7.4%), KP (35.7%), and K-only (28.6%) subgroups (P<0.001) in the SU2C cohort (174 patients) with KRAS-mutant LUAC and in patients treated with nivolumab in the CheckMate-057 phase 3 trial (0% vs 57...
May 17, 2018: Cancer Discovery
https://www.readbyqxmd.com/read/29769147/association-of-pulmonary-cardiovascular-and-hematologic-metrics-with-carbon-nanotube-and-nanofiber-exposure-among-u-s-workers-a-cross-sectional-study
#9
Mary K Schubauer-Berigan, Matthew M Dahm, Aaron Erdely, John D Beard, M Eileen Birch, Douglas E Evans, Joseph E Fernback, Robert R Mercer, Stephen J Bertke, Tracy Eye, Marie A de Perio
BACKGROUND: Commercial use of carbon nanotubes and nanofibers (CNT/F) in composites and electronics is increasing; however, little is known about health effects among workers. We conducted a cross-sectional study among 108 workers at 12 U.S. CNT/F facilities. We evaluated chest symptoms or respiratory allergies since starting work with CNT/F, lung function, resting blood pressure (BP), resting heart rate (RHR), and complete blood count (CBC) components. METHODS: We conducted multi-day, full-shift sampling to measure background-corrected elemental carbon (EC) and CNT/F structure count concentrations, and collected induced sputum to measure CNT/F in the respiratory tract...
May 16, 2018: Particle and Fibre Toxicology
https://www.readbyqxmd.com/read/29767708/resinosis-inhibits-monochamus-spp-coleoptera-cerambycidae-colonization-of-healthy-shortleaf-pines-in-southeastern-united-states
#10
Matthew W Ethington, Larry D Galligan, Fred M Stephen
The genus Monochamus Dejean (Coleoptera: Cerambycidae) includes large, woodboring, longhorned beetles, which colonize pine trees in North America. Many authors have classified the genus as saprophagous, but one recent study reported successful colonization of standing jack pine trees (Pinus banksiana Lamb.) (Pinales: Pinaceae) following severe wind disturbance in Minnesota. We tested whether two Monochamus species native to the southeastern United States (M. titillator (Fabricius) and M. carolinensis (Olivier)) could successfully colonize healthy shortleaf pines (Pinus echinata Mill...
May 14, 2018: Environmental Entomology
https://www.readbyqxmd.com/read/29761096/editorial-precision-public-health
#11
EDITORIAL
Tarun Stephen Weeramanthri, Hugh J S Dawkins, Gareth Baynam, Matthew Bellgard, Ori Gudes, James Bernard Semmens
No abstract text is available yet for this article.
2018: Frontiers in Public Health
https://www.readbyqxmd.com/read/29760597/application-of-an-incident-taxonomy-for-radiation-therapy-analysis-of-five-years-of-data-from-three-integrated-cancer-centres
#12
Stuart Greenham, Stephen Manley, Kirsty Turnbull, Matthew Hoffmann, Amara Fonseca, Justin Westhuyzen, Andrew Last, Noel J Aherne, Thomas P Shakespeare
Aim: To develop and apply a clinical incident taxonomy for radiation therapy. Background: Capturing clinical incident information that focuses on near-miss events is critical for achieving higher levels of safety and reliability. Methods and materials: A clinical incident taxonomy for radiation therapy was established; coding categories were prescription, consent, simulation, voluming, dosimetry, treatment, bolus, shielding, imaging, quality assurance and coordination of care...
May 2018: Reports of Practical Oncology and Radiotherapy
https://www.readbyqxmd.com/read/29759722/new-insights-into-an-old-arrhythmia-high-resolution-mapping-demonstrates-conduction-and-substrate-variability-in-right-atrial-macro-re-entrant-tachycardia
#13
Bhupesh Pathik, Geoffrey Lee, Frédéric Sacher, Pierre Jaïs, Grégoire Massoullié, Nicolas Derval, Matthew G Bates, Jonathan Lipton, Stephen Joseph, Joseph Morton, Paul Sparks, Peter Kistler, Jonathan M Kalman
OBJECTIVES: Using high-resolution 3-dimensional (3D) mapping, the aim of this study was to further characterize right atrial macro-re-entrant tachycardias and answer unresolved questions in the understanding of this arrhythmia. BACKGROUND: Despite advances in understanding of the mechanisms of right atrial macro-re-entrant tachycardias, many questions lack definitive answers. The advent of high-resolution 3D mapping provides an opportunity to gain further insights into the nature of these common circuits...
September 2017: JACC. Clinical Electrophysiology
https://www.readbyqxmd.com/read/29754489/realistic-atomistic-structure-of-amorphous-silicon-from-machine-learning-driven-molecular-dynamics
#14
Volker L Deringer, Noam Bernstein, Albert Bartok, Matthew J Cliffe, Rachel N Kerber, Lauren E Marbella, Clare P Grey, Stephen R Elliott, Gábor Csányi
Amorphous silicon (a-Si) is a widely studied non-crystalline material, and yet the subtle details of its atomistic structure are still unclear. Here, we show that accurate structural models of a-Si can be obtained using a machine-learning-based interatomic potential. Our best a-Si network is obtained by simulated cooling from the melt at a rate of 1011 K/s (that is, on the 10 ns timescale), contains less than 2% defects, and agrees with experiments regarding excess energies, diffraction data, and 29 Si NMR chemical shifts...
May 12, 2018: Journal of Physical Chemistry Letters
https://www.readbyqxmd.com/read/29753843/using-temporal-ica-to-selectively-remove-global-noise-while-preserving-global-signal-in-functional-mri-data
#15
Matthew F Glasser, Timothy S Coalson, Janine D Bijsterbosch, Samuel J Harrison, Michael P Harms, Alan Anticevic, David C Van Essen, Stephen M Smith
Temporal fluctuations in functional Magnetic Resonance Imaging (fMRI) have been profitably used to study brain activity and connectivity for over two decades. Unfortunately, fMRI data also contain structured temporal "noise" from a variety of sources, including subject motion, subject physiology, and the MRI equipment. Recently, methods have been developed to automatically and selectively remove spatially specific structured noise from fMRI data using spatial Independent Components Analysis (ICA) and machine learning classifiers...
May 10, 2018: NeuroImage
https://www.readbyqxmd.com/read/29753779/ecology-and-biogenesis-of-functional-amyloids-in-pseudomonas
#16
REVIEW
Sarah L Rouse, Stephen J Matthews, Morten S Dueholm
Functional amyloids can be found in the extracellular matrix produced by many bacteria during biofilm growth. They mediate the initial attachment of bacteria to surfaces and provide stability and functionality to mature biofilms. Efficient amyloid biogenesis requires a highly coordinated system of amyloid subunits, molecular chaperones and transport systems. The functional amyloid of Pseudomonas (Fap) represents such a system. Here, we review the phylogenetic diversification of the Fap system, its potential ecological role and the dedicated machinery required for Fap biogenesis, with a particular focus on the amyloid exporter FapF, the structure of which has been recently resolved...
May 10, 2018: Journal of Molecular Biology
https://www.readbyqxmd.com/read/29753517/liberal-versus-restrictive-intravenous-fluid-therapy-for-early-septic-shock-rationale-for-a-randomized-trial
#17
Wesley H Self, Matthew W Semler, Rinaldo Bellomo, Samuel M Brown, Bennett P deBoisblanc, Matthew C Exline, Adit A Ginde, Colin K Grissom, David R Janz, Alan E Jones, Kathleen D Liu, Stephen P J Macdonald, Chadwick D Miller, Pauline K Park, Lora A Reineck, Todd W Rice, Jay S Steingrub, Daniel Talmor, Donald M Yealy, Ivor S Douglas, Nathan I Shapiro
Prompt intravenous fluid therapy is a fundamental treatment for patients with septic shock. However, the optimal approach for administering intravenous fluid in septic shock resuscitation is unknown. Two competing strategies are emerging: a liberal fluids approach, consisting of a larger volume of initial fluid (50 to 75 mL/kg [4 to 6 L in an 80-kg adult] during the first 6 hours) and later use of vasopressors, versus a restrictive fluids approach, consisting of a smaller volume of initial fluid (≤30 mL/kg [≤2 to 3 L]), with earlier reliance on vasopressor infusions to maintain blood pressure and perfusion...
May 9, 2018: Annals of Emergency Medicine
https://www.readbyqxmd.com/read/29753158/melphalan-based-reduced-intensity-conditioning-is-associated-with-favorable-disease-control-and-acceptable-toxicities-in-patients-older-than-70-with-hematologic-malignancies-undergoing-allogeneic-hematopoietic-stem-cell-transplantation
#18
Monzr M Al Malki, Nitya Nathwani, Dongyun Yang, Saro Armenian, Sanjeet Dadwal, Jaroslava Salman, Sally Mokhtari, Thai Cao, Karamjeet Sandhu, Michelle Rouse, Matthew Mei, Haris Ali, Pablo Parker, Joseph Alvarnas, Eileen Smith, Margaret O Donnell, Guido Marcucci, David Snyder, Auayporn Nademanee, Stephen J Forman, Anthony Stein, Ryotaro Nakamura
Allogeneic hematopoietic stem cell transplantation (AlloHCT) is offered increasingly to elderly patients with hematologic malignancies. However, outcome data in those who are 70 years or older are limited, and no standard conditioning regimen has been established for this population. In this retrospective study, we evaluated the outcome of 53 consecutive patients aged 70 years and older who underwent AlloHCT with melphalan (Mel)-based reduced-intensity conditioning (RIC) at City of Hope. Engraftment was prompt, with median time to neutrophil engraftment of 15 days...
May 9, 2018: Biology of Blood and Marrow Transplantation
https://www.readbyqxmd.com/read/29750375/the-ontario-birth-study-a-prospective-pregnancy-cohort-study-integrating-perinatal-research-into-clinical-care
#19
Laura N Anderson, Julia A Knight, Rayjean J Hung, Sheryl L Hewko, Ryan A Seeto, Mary-Jean Martin, Alison Fleming, Jonathon L Maguire, Stephen G Matthews, Kellie E Murphy, Nan Okun, Jennifer M Jenkins, Stephen J Lye, Alan Bocking
BACKGROUND: Pregnancy and early childhood represent critical periods that impact health throughout the life-course. The Ontario Birth Study (OBS) is a pregnancy cohort study designed as a platform for research on pregnancy complications, maternal and infant health, and the developmental origins of health and disease. METHODS: Pregnant women <17 weeks gestational age were recruited between 2013 and 2015 from antenatal clinics at Mount Sinai Hospital, Toronto, Canada...
May 11, 2018: Paediatric and Perinatal Epidemiology
https://www.readbyqxmd.com/read/29750252/whole-exome-sequencing-of-an-exceptional-longevity-cohort
#20
Haakon B Nygaard, E Zeynep Erson-Omay, Xiujuan Wu, Brianne A Kent, Cecily Q Bernales, Daniel M Evans, Matthew J Farrer, Carles Vilariño-Güell, Stephen M Strittmatter
Centenarians represent a unique cohort to study the genetic basis for longevity and factors determining the risk of neurodegenerative disorders, including Alzheimer's disease (AD). The estimated genetic contribution to longevity is highest in centenarians and supercententenarians, but few genetic variants have been shown to clearly impact this phenotype. While the genetic risk for AD and other dementias is now well understood, the frequency of known dementia risk variants in centenarians is not fully characterized...
May 10, 2018: Journals of Gerontology. Series A, Biological Sciences and Medical Sciences
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