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Michael O'Brien

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https://www.readbyqxmd.com/read/28740907/functional-imaging-equivalence-and-proof-of-concept-for-image-guided-adaptive-radiotherapy-with-fixed-gantry-and-rotating-couch
#1
Ilana Feain, Chun-Chien Shieh, Paul White, Ricky O'Brien, Sandra Fisher, William Counter, Peter Lazarakis, David Stewart, Simon Downes, Michael Jackson, Siddhartha Baxi, Brendan Whelan, Kuldeep Makhija, Chen-Yu Huang, Michael Barton, Paul Keall
PURPOSE: The purpose of this article is to present the first imaging experiments to demonstrate the functional equivalence between a conventional rotational gantry and a fixed-beam imaging geometry, and the feasibility of an iterative image-reconstruction technique under gravitational deformation. METHODS AND MATERIALS: Experiments were performed using an Elekta Axesse with Agility MLC and XVI, a custom-built rotating phantom stage, a Catphan QA phantom, and a porcine heart...
October 2016: Advances in Radiation Oncology
https://www.readbyqxmd.com/read/28733972/expression-and-function-of-the-metabotropic-purinergic-p2y-receptor-family-in-experimental-seizure-models-and-patients-with-drug-refractory-epilepsy
#2
Mariana Alves, Rosa Gomez-Villafuertes, Norman Delanty, Michael A Farrell, Donncha F O'Brien, Maria Teresa Miras-Portugal, Miguel Diaz Hernandez, David C Henshall, Tobias Engel
OBJECTIVE: ATP is released into the extracellular space during pathologic processes including increased neuronal firing. Once released, ATP acts on P2 receptors including ionotropic P2X and metabotropic P2Y receptors, resulting in changes to glial function and neuronal network excitability. Evidence suggests an involvement of P2Y receptors in the pathogenesis of epilepsy, but there has been no systematic effort to characterize the expression and function of the P2Y receptor family during seizures and in experimental and human epilepsy...
July 21, 2017: Epilepsia
https://www.readbyqxmd.com/read/28728688/transcatheter-versus-surgical-aortic%C3%A2-valve%C3%A2-replacement-propensity-matched-comparison
#3
J Matthew Brennan, Laine Thomas, David J Cohen, David Shahian, Alice Wang, Michael J Mack, David R Holmes, Fred H Edwards, Naftali Z Frankel, Suzanne J Baron, John Carroll, Vinod Thourani, E Murat Tuzcu, Suzanne V Arnold, Roberta Cohn, Todd Maser, Brenda Schawe, Susan Strong, Allen Stickfort, Elizabeth Patrick-Lake, Felicia L Graham, Dadi Dai, Fan Li, Roland A Matsouaka, Sean O'Brien, Fan Li, Michael J Pencina, Eric D Peterson
BACKGROUND: Randomized trials support the use of transcatheter aortic valve replacement (TAVR) for the treatment of aortic stenosis in high- and intermediate-risk patients, but the generalizability of those results in clinical practice has been challenged. OBJECTIVES: The aim of this study was to determine the safety and effectiveness of TAVR versus surgical aortic valve replacement (SAVR), particularly in intermediate- and high-risk patients, in a nationally representative real-world cohort...
July 25, 2017: Journal of the American College of Cardiology
https://www.readbyqxmd.com/read/28726312/spinal-cord-stimulator-related-infections-findings-from-a-multicenter-retrospective-analysis-of-2737-implants
#4
Markus A Bendel, Travis O'Brien, Bryan C Hoelzer, Timothy R Deer, Thomas P Pittelkow, Shrif Costandi, David R Walega, Gerges Azer, Salim M Hayek, Zhen Wang, Jason S Eldrige, Wenchun Qu, Joshua M Rosenow, Steven M Falowski, Stephanie A Neuman, Susan M Moeschler, Catherine Wassef, Christopher Kim, Tariq Niazi, Taher Saifullah, Brian Yee, Chong Kim, Christine L Oryhan, Daniel T Warren, Imanuel Lerman, Ruben Mora, Michael Hanes, Thomas Simopoulos, Sanjiv Sharma, Chris Gilligan, Warren Grace, Timothy Ade, Nagy A Mekhail, John P Hunter, Daniel Choi, Deborah Y Choi
INTRODUCTION: Surgical site infection is a potential complication of spinal cord stimulator (SCS) implantation. Current understanding of the epidemiology, diagnosis, and treatment of these infections is based largely on small clinical studies, many of which are outdated. Evidence-based guidelines for management of SCS-related infections thus rely instead on expert opinion, case reports, and case series. In this study, we aim to provide a large scale retrospective study of infection management techniques specifically for SCS implantation...
July 20, 2017: Neuromodulation: Journal of the International Neuromodulation Society
https://www.readbyqxmd.com/read/28726142/single-incision-surgery-trocar-site-hernia-an-updated-systematic-review-meta-analysis-with-trial-sequential-analysis-by-the-minimally-invasive-surgery-synthesis-of-interventions-outcomes-network-mission
#5
Stavros A Antoniou, Josep M García-Alamino, Shahab Hajibandeh, Shahin Hajibandeh, Michael Weitzendorfer, Filip E Muysoms, Frank A Granderath, George E Chalkiadakis, Klaus Emmanuel, George A Antoniou, Meropi Gioumidou, Styliani Iliopoulou-Kosmadaki, Maria Mathioudaki, Kyriakos Souliotis
BACKGROUND: Single-incision laparoscopic surgery (SILS) is a new technique that aims to minimize abdominal wall trauma and improve cosmesis. Concerns have been raised about the risk of trocar-site hernia following SILS. This study aims to assess the risk of trocar-site hernia following SILS compared to conventional laparoscopic surgery, and investigate whether current evidence is conclusive. METHODS: We performed a systematic search of MEDLINE, AMED, CINAHL, CENTRAL, and OpenGrey...
July 19, 2017: Surgical Endoscopy
https://www.readbyqxmd.com/read/28719003/mutation-intolerant-genes-and-targets-of-fmrp-are-enriched-for-nonsynonymous-alleles-in-schizophrenia
#6
Ganna Leonenko, Alexander L Richards, James T Walters, Andrew Pocklington, Kimberly Chambert, Mariam M Al Eissa, Sally I Sharp, Niamh L O'Brien, David Curtis, Nicholas J Bass, Andrew McQuillin, Christina Hultman, Jennifer L Moran, Steven A McCarroll, Pamela Sklar, Benjamin M Neale, Peter A Holmans, Michael J Owen, Patrick F Sullivan, Michael C O'Donovan
Risk of schizophrenia is conferred by alleles occurring across the full spectrum of frequencies from common SNPs of weak effect through to ultra rare alleles, some of which may be moderately to highly penetrant. Previous studies have suggested that some of the risk of schizophrenia is attributable to uncommon alleles represented on Illumina exome arrays. Here, we present the largest study of exomic variation in schizophrenia to date, using samples from the United Kingdom and Sweden (10,011 schizophrenia cases and 13,791 controls)...
July 18, 2017: American Journal of Medical Genetics. Part B, Neuropsychiatric Genetics
https://www.readbyqxmd.com/read/28698975/exploring-the-impact-of-feedback-on-prescribing-error-rates-a-pilot-study
#7
Michael Lloyd, Simon David Watmough, Sarah Victoria O'Brien, Kevin Hardy, Niall Furlong
Background Prescribing errors are prevalent in hospital settings with feedback identified as one potential error reduction strategy. Hospital pharmacists work alongside prescribers at ward level and are credible facilitators of prescribing error feedback. A formalised programme of pharmacist-led prescribing error feedback was designed and implemented Objective To determine the impact of the feedback intervention on prescribing error rates. Method Prospective prescribing audits were undertaken at baseline for control (n = 11) and intervention group (n = 10) prescribers...
July 11, 2017: International Journal of Clinical Pharmacy
https://www.readbyqxmd.com/read/28660670/defaunation-and-habitat-disturbance-interact-synergistically-to-alter-seedling-recruitment
#8
Alys Granados, Jedediah F Brodie, Henry Bernard, Michael J O'Brien
Vertebrate granivores destroy plant seeds, but whether animal-induced seed mortality alters plant recruitment varies with habitat context, seed traits, and among granivore species. An incomplete understanding of seed predation makes it difficult to predict how widespread extirpations of vertebrate granivores in tropical forests might affect tree communities, especially in the face of habitat disturbance. Many tropical forests are simultaneously affected by animal loss as well as habitat disturbance, but the consequences of each for forest regeneration are often studied separately or additively, and usually on a single plant demographic stage...
June 29, 2017: Ecological Applications: a Publication of the Ecological Society of America
https://www.readbyqxmd.com/read/28658250/estimating-the-prevalence-of-food-risk-increasing-behaviours-in-uk-kitchens
#9
Anna K Jones, Paul Cross, Michael Burton, Caroline Millman, Sarah J O'Brien, Dan Rigby
Foodborne disease poses a serious threat to public health. In the UK, half a million cases are linked to known pathogens and more than half of all outbreaks are associated with catering establishments. The UK Food Standards Agency (FSA) has initiated the UK Food Hygiene Rating Scheme in which commercial food establishments are inspected and scored with the results made public. In this study we investigate the prevalence of food risk increasing behaviours among chefs, catering students and the public. Given the incentive for respondents to misreport when asked about illegal or illicit behaviours we employed a Randomised Response Technique designed to elicit more accurate prevalence rates of such behaviours...
2017: PloS One
https://www.readbyqxmd.com/read/28648533/recurrent-laryngeal-nerve-injury-and-swallowing-dysfunction-in-neonatal-aortic-arch-repair
#10
Kamal K Pourmoghadam, William M DeCampli, Mark Ruzmetov, James Kosko, Sami Kishawi, Michael O'Brien, Amanda Cowden, Kurt Piggott, Harun Fakioglu
BACKGROUND: We evaluated the incidence, clinical effect, and recovery rate of vocal cord dysfunction (VCD) and swallowing dysfunction in neonates undergoing aortic arch repair. METHODS: We retrospectively evaluated 101 neonates who underwent aortic arch reconstruction from 2008 to 2015. Direct flexible laryngoscopy was performed in 89 patients before initiation of postoperative oral feeding after Norwood (n = 63) and non-Norwood (n = 26) arch reconstruction. We defined VCD as immobility of vocal cords or their lack of coaptation and poor mobility...
June 22, 2017: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/28642008/concurrent-once-daily-versus-twice-daily-chemoradiotherapy-in-patients-with-limited-stage-small-cell-lung-cancer-convert-an-open-label-phase-3-randomised-superiority-trial
#11
Corinne Faivre-Finn, Michael Snee, Linda Ashcroft, Wiebke Appel, Fabrice Barlesi, Adityanarayan Bhatnagar, Andrea Bezjak, Felipe Cardenal, Pierre Fournel, Susan Harden, Cecile Le Pechoux, Rhona McMenemin, Nazia Mohammed, Mary O'Brien, Jason Pantarotto, Veerle Surmont, Jan P Van Meerbeeck, Penella J Woll, Paul Lorigan, Fiona Blackhall
BACKGROUND: Concurrent chemoradiotherapy is the standard of care in limited-stage small-cell lung cancer, but the optimal radiotherapy schedule and dose remains controversial. The aim of this study was to establish a standard chemoradiotherapy treatment regimen in limited-stage small-cell lung cancer. METHODS: The CONVERT trial was an open-label, phase 3, randomised superiority trial. We enrolled adult patients (aged ≥18 years) who had cytologically or histologically confirmed limited-stage small-cell lung cancer, Eastern Cooperative Oncology Group performance status of 0-2, and adequate pulmonary function...
June 19, 2017: Lancet Oncology
https://www.readbyqxmd.com/read/28638524/changing-spaces-and-learning-environments-to-improve-inpatient-interprofessional-education-for-internal-medicine-residents
#12
Daphne Lo, Neil Zhang, Kathryn Eubank, G Michael Harper, Michi Yukawa, Bridget O'Brien
No abstract text is available yet for this article.
June 2017: Journal of Graduate Medical Education
https://www.readbyqxmd.com/read/28628256/cutaneous-involvement-in-luteinized-thecomas-with-sclerosing-peritonitis-ltsp-a-new-finding-in-a-rare-syndrome
#13
Jonathan D Ho, Jag Bhawan, Michael J O'Brien, Lynne J Goldberg
Luteinized thecomas with sclerosing peritonitis (LTSP) is a rare disease characterized by ovarian luteinized thecomas and associated fibrosing peritonitis. Cutaneous involvement has never been reported. We report a case of classical LTSP with skin involvement, outlining the clinical and histopathologic features of this novel presentation of a rare syndrome.
June 19, 2017: Journal of Cutaneous Pathology
https://www.readbyqxmd.com/read/28607764/chronic-medial-instability-of-the-elbow
#14
REVIEW
Felix H Savoie, Michael O'Brien
Damage to the medial collateral ligament of the elbow from an instability episode usually heals with non-operative treatment. In some cases, residual instability may occur, leading to functional impairment.Non-operative management can be successful when bracing, taping and therapy are used to stabilise the elbow.A recent report detailing the efficacy of platelet-rich plasma in effectively treating ulnar collateral ligament (UCL) injuries in throwers has shown promise. However, there remain specific groups that should be considered for repair or reconstruction...
January 2017: EFORT open reviews
https://www.readbyqxmd.com/read/28607431/cerebrospinal-fluid-micrornas-are-potential-biomarkers-of-temporal-lobe-epilepsy-and-status-epilepticus
#15
Rana Raoof, Eva M Jimenez-Mateos, Sebastian Bauer, Björn Tackenberg, Felix Rosenow, Johannes Lang, Müjgan Dogan Onugoren, Hajo Hamer, Tessa Huchtemann, Peter Körtvélyessy, Niamh M C Connolly, Shona Pfeiffer, Jochen H M Prehn, Michael A Farrell, Donncha F O'Brien, David C Henshall, Catherine Mooney
There is a need for diagnostic biomarkers of epilepsy and status epilepticus to support clinical examination, electroencephalography and neuroimaging. Extracellular microRNAs may be potentially ideal biomarkers since some are expressed uniquely within specific brain regions and cell types. Cerebrospinal fluid offers a source of microRNA biomarkers with the advantage of being in close contact with the target tissue and sites of pathology. Here we profiled microRNA levels in cerebrospinal fluid from patients with temporal lobe epilepsy or status epilepticus, and compared findings to matched controls...
June 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28592868/the-shape-and-size-of-hydroxyapatite-particles-dictate-inflammatory-responses-following-implantation
#16
Filipa Lebre, Rukmani Sridharan, Michael J Sawkins, Daniel J Kelly, Fergal J O'Brien, Ed C Lavelle
The extent of regeneration following biomaterial implantation is dependent on the microenvironment surrounding the implant. Since implant composition can have a profound effect on inflammation, it is essential to understand this process as a non-resolving inflammatory response can lead to fibrous encapsulation and insufficient integration. Incorporation of particulates into implants confers structural and functional benefits, thus optimizing particulate characteristics to enhance immune mediated efficacy is important...
June 7, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28576389/healthcare-utilization-in-adults-with-opioid-dependence-receiving-extended-release-naltrexone-compared-to-treatment-as-usual
#17
William E Soares, Donna Wilson, Niels Rathlev, Joshua D Lee, Michael Gordon, Edward V Nunes, Charles P O'Brien, Peter D Friedmann
BACKGROUND: Opioid use disorders have reached epidemic proportions, with overdose now the leading cause of accidental death in the United States. Extended release naltrexone (XR-NTX) has emerged as a medication treatment that reduces opioid use and craving. However, the effect of XR-NTX therapy on acute healthcare utilization, including emergency department visits and inpatient hospitalizations, remains uncertain. The objective of the current study is to evaluate hospital-based healthcare resource utilization in adults involved in the criminal justice system with a history of opioid use disorder randomized to XR-NTX therapy compared with treatment as usual (TAU) during a 6-month treatment phase and 12months post-treatment follow up...
May 12, 2017: Journal of Substance Abuse Treatment
https://www.readbyqxmd.com/read/28546554/high-throughput-resistance-profiling-of-plasmodium-falciparum-infections-based-on-custom-dual-indexing-and-illumina-next-generation-sequencing-technology
#18
Sidsel Nag, Marlene D Dalgaard, Poul-Erik Kofoed, Johan Ursing, Marina Crespo, Lee O'Brien Andersen, Frank Møller Aarestrup, Ole Lund, Michael Alifrangis
Genetic polymorphisms in P. falciparum can be used to indicate the parasite's susceptibility to antimalarial drugs as well as its geographical origin. Both of these factors are key to monitoring development and spread of antimalarial drug resistance. In this study, we combine multiplex PCR, custom designed dual indexing and Miseq sequencing for high throughput SNP-profiling of 457 malaria infections from Guinea-Bissau, at the cost of 10 USD per sample. By amplifying and sequencing 15 genetic fragments, we cover 20 resistance-conferring SNPs occurring in pfcrt, pfmdr1, pfdhfr, pfdhps, as well as the entire length of pfK13, and the mitochondrial barcode for parasite origin...
May 25, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28530713/bach2-immunodeficiency-illustrates-an-association-between-super-enhancers-and-haploinsufficiency
#19
Behdad Afzali, Juha Grönholm, Jana Vandrovcova, Charlotte O'Brien, Hong-Wei Sun, Ine Vanderleyden, Fred P Davis, Ahmad Khoder, Yu Zhang, Ahmed N Hegazy, Alejandro V Villarino, Ira W Palmer, Joshua Kaufman, Norman R Watts, Majid Kazemian, Olena Kamenyeva, Julia Keith, Anwar Sayed, Dalia Kasperaviciute, Michael Mueller, Jason D Hughes, Ivan J Fuss, Mohammed F Sadiyah, Kim Montgomery-Recht, Joshua McElwee, Nicholas P Restifo, Warren Strober, Michelle A Linterman, Paul T Wingfield, Holm H Uhlig, Rahul Roychoudhuri, Timothy J Aitman, Peter Kelleher, Michael J Lenardo, John J O'Shea, Nichola Cooper, Arian D J Laurence
The transcriptional programs that guide lymphocyte differentiation depend on the precise expression and timing of transcription factors (TFs). The TF BACH2 is essential for T and B lymphocytes and is associated with an archetypal super-enhancer (SE). Single-nucleotide variants in the BACH2 locus are associated with several autoimmune diseases, but BACH2 mutations that cause Mendelian monogenic primary immunodeficiency have not previously been identified. Here we describe a syndrome of BACH2-related immunodeficiency and autoimmunity (BRIDA) that results from BACH2 haploinsufficiency...
July 2017: Nature Immunology
https://www.readbyqxmd.com/read/28530549/a-genetic-basis-for-molecular-asymmetry-at-vertebrate-electrical-synapses
#20
Adam C Miller, Alex C Whitebirch, Arish N Shah, Kurt C Marsden, Michael Granato, John O'Brien, Cecilia B Moens
Neural network function is based upon the patterns and types of connections made between neurons. Neuronal synapses are adhesions specialized for communication and they come in two types, chemical and electrical. Communication at chemical synapses occurs via neurotransmitter release whereas electrical synapses utilize gap junctions for direct ionic and metabolic coupling. Electrical synapses are often viewed as symmetrical structures, with the same components making both sides of the gap junction. By contrast, we show that a broad set of electrical synapses in zebrafish, Danio rerio, require two gap-junction-forming Connexins for formation and function...
May 22, 2017: ELife
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