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Michael O'Brien

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https://www.readbyqxmd.com/read/28938402/the-pathophysiological-sequence-of-glucocorticoid-induced-osteonecrosis-of-the-femoral-head-in-male-mice
#1
Robert S Weinstein, Erin A Hogan, Michael J Borrelli, Serguei Liachenko, Charles A O'Brien, Stavros C Manolagas
In search of the sequence of pathogenic events leading to glucocorticoid-induced osteonecrosis, we determined the molecular, biomechanical, cellular, and vascular changes in the femur of C57BL/6 mice receiving prednisolone for 14, 28 or 42 days. The femoral head, but not the distal femur, of mice treated for 14 days showed a decrease in the expression of the hypoxia-inducible factor (Hif-1α) and vascular endothelial growth factor (VEGF), the number of osteoblasts, bone formation rate and strength and an increase in osteoclasts...
September 14, 2017: Endocrinology
https://www.readbyqxmd.com/read/28925785/risk-adjusted-therapy-in-chronic-lymphocytic-leukemia-a-phase-ii-cancer-trials-ireland-ctrial-ie-icorg-07-01-study-of-fludarabine-cyclophosphamide-and-rituximab-therapy-evaluating-response-adapted-abbreviated-frontline-therapy-with-fcr-in-non-del-17p-cll
#2
Niamh Appleby, David O'Brien, Fiona M Quinn, Liam Smyth, Johanna Kelly, Imelda Parker, Kathleen Scott, Mary R Cahill, Gerard Crotty, Helen Enright, Brian Hennessy, Andrew Hodgson, Maeve Leahy, Hilary O'Leary, Michael O'Dwyer, Amjad Hayat, Elisabeth A Vandenberghe
Minimal residual disease negative complete response (MRD-negative CR) provides an early marker for time to treatment failure (TTF) in CLL treated with fludarabine, cyclophosphamide, and rituximab (FCR). MRD was assessed after four FCR cycles (FCR4); MRD-negative CR patients discontinued treatment. Fifty-two patients (35M; 17F) were enrolled. Eighteen (18/52; 34.6%) patients reached MRD-negative CR after FCR4 and 29/52 (55.8%) were MRD-negative CR at end of treatment (EOT). Median TTF was 71.1 months (95% CI 61...
September 19, 2017: Leukemia & Lymphoma
https://www.readbyqxmd.com/read/28924575/ex-vivo-tissue-imaging-for-radiology-pathology-correlation-a-pilot-study-with-a-small-bore-7-t-mri-in-a-rare-pigmented-ganglioglioma-exhibiting-complex-mr-signal-characteristics-associated-with-melanin-and-hemosiderin
#3
Kant M Matsuda, Ana Lopes-Calcas, Michael L Honke, Zoe O'Brien-Moran, Richard Buist, Michael West, Melanie Martin
To advance magnetic resonance imaging (MRI) technologies further for in vivo tissue characterization with histopathologic validation, we investigated the feasibility of ex vivo tissue imaging of a surgically removed human brain tumor as a comprehensive approach for radiology-pathology correlation in histoanatomically identical fashion in a rare case of pigmented ganglioglioma with complex paramagnetic properties. Pieces of surgically removed ganglioglioma, containing melanin and hemosiderin pigments, were imaged with a small bore 7-T MRI scanner to obtain T1-, T2-, and T2*-weighted image and diffusion tensor imaging (DTI)...
July 2017: Journal of Medical Imaging
https://www.readbyqxmd.com/read/28911764/global-respiratory-syncytial-virus-associated-mortality-in-young-children-rsv-gold-a-retrospective-case-series
#4
Nienke M Scheltema, Angela Gentile, Florencia Lucion, D James Nokes, Patrick K Munywoki, Shabir A Madhi, Michelle J Groome, Cheryl Cohen, Jocelyn Moyes, Kentigern Thorburn, Somsak Thamthitiwat, Hitoshi Oshitani, Socorro P Lupisan, Aubree Gordon, José F Sánchez, Katherine L O'Brien, Bradford D Gessner, Agustinus Sutanto, Asuncion Mejias, Octavio Ramilo, Najwa Khuri-Bulos, Natasha Halasa, Fernanda de-Paris, Márcia Rosane Pires, Michael C Spaeder, Bosco A Paes, Eric A F Simões, Ting F Leung, Maria Tereza da Costa Oliveira, Carla Cecília de Freitas Lázaro Emediato, Quique Bassat, Warwick Butt, Hsin Chi, Uzma Bashir Aamir, Asad Ali, Marilla G Lucero, Rodrigo A Fasce, Olga Lopez, Barbara A Rath, Fernando P Polack, Jesse Papenburg, Srđan Roglić, Hisato Ito, Edward A Goka, Diederick E Grobbee, Harish Nair, Louis J Bont
BACKGROUND: Respiratory syncytial virus (RSV) infection is an important cause of pneumonia mortality in young children. However, clinical data for fatal RSV infection are scarce. We aimed to identify clinical and socioeconomic characteristics of children aged younger than 5 years with RSV-related mortality using individual patient data. METHODS: In this retrospective case series, we developed an online questionnaire to obtain individual patient data for clinical and socioeconomic characteristics of children aged younger than 5 years who died with community-acquired RSV infection between Jan 1, 1995, and Oct 31, 2015, through leading research groups for child pneumonia identified through a comprehensive literature search and existing research networks...
October 2017: Lancet Global Health
https://www.readbyqxmd.com/read/28899569/on-the-influence-of-wall-calcification-and-intraluminal-thrombus-on-prediction-of-abdominal-aortic-aneurysm-rupture
#5
Hilary E Barrett, Eoghan M Cunnane, Hena Hidayat, Julie M O'Brien, Michael A Moloney, Eamon G Kavanagh, Michael T Walsh
OBJECTIVE: Parameters other than maximum diameter that predict rupture of abdominal aortic aneurysms (AAAs) may be helpful for risk-benefit analysis in individual patients. The aim of this study was to characterize the biomechanical-structural characteristics associated with AAA walls to better identify the related mechanistic variables required for an accurate prediction of rupture risk. METHODS: Anterior AAA wall (n = 40) and intraluminal thrombus (ILT; n = 114) samples were acquired from 18 patients undergoing open surgical repair...
September 9, 2017: Journal of Vascular Surgery
https://www.readbyqxmd.com/read/28875550/outcomes-of-endovascular-treatment-for-acute-large-vessel-ischemic-stroke-more-than-6-hours-after-symptom-onset
#6
Ronan Motyer, Hong Kuan Kok, Hamed Asadi, Alan O'Hare, Paul Brennan, Sarah Power, Seamus Looby, Patrick Nicholson, David Williams, Sean Murphy, Michael D Hill, Mayank Goyal, John McManus, Paul O'Brien, John Thornton
BACKGROUND AND OBJECTIVES: Benefit from endovascular thrombectomy (EVT) for large vessel occlusion (LVO) acute ischemic stroke (AIS) is well demonstrated. Furthermore, emerging evidence supports efficacy in appropriately selected patients treated beyond current recommendations of 6 hours. We evaluated clinical outcomes in patients undergoing late EVT at our institution. METHODS: Retrospective review of prospectively collected clinical database on 355 patients who underwent EVT for LVO AIS...
September 5, 2017: Journal of Internal Medicine
https://www.readbyqxmd.com/read/28874164/radiation-free-cmr-diagnostic-heart-catheterization-in-children
#7
Kanishka Ratnayaka, Joshua P Kanter, Anthony Z Faranesh, Elena K Grant, Laura J Olivieri, Russell R Cross, Ileen F Cronin, Karin S Hamann, Adrienne E Campbell-Washburn, Kendall J O'Brien, Toby Rogers, Michael S Hansen, Robert J Lederman
BACKGROUND: Children with heart disease may require repeated X-Ray cardiac catheterization procedures, are more radiosensitive, and more likely to survive to experience oncologic risks of medical radiation. Cardiovascular magnetic resonance (CMR) is radiation-free and offers information about structure, function, and perfusion but not hemodynamics. We intend to perform complete radiation-free diagnostic right heart catheterization entirely using CMR fluoroscopy guidance in an unselected cohort of pediatric patients; we report the feasibility and safety...
September 6, 2017: Journal of Cardiovascular Magnetic Resonance
https://www.readbyqxmd.com/read/28869781/plant-diversity-maintains-long-term-ecosystem-productivity-under-frequent-drought-by-increasing-short-term-variation
#8
Cameron Wagg, Michael J O'Brien, Anja Vogel, Michael Scherer-Lorenzen, Nico Eisenhauer, Bernhard Schmid, Alexandra Weigelt
Increasing frequency of extreme climatic events can disrupt ecosystem processes and destabilize ecosystem functioning. Biodiversity may dampen these negative effects of environmental perturbations to provide greater ecosystem stability. We assessed the effects of plant diversity on the resistance, recovery and stability of experimental grassland ecosystems in response to recurring summer drought over seven years. Plant biomass production was reduced during the summer drought treatment compared with control plots...
September 4, 2017: Ecology
https://www.readbyqxmd.com/read/28859185/salvage-chemoimmunotherapy-with-inotuzumab-ozogamicin-combined-with-mini-hyper-cvd-for-patients-with-relapsed-or-refractory-philadelphia-chromosome-negative-acute-lymphoblastic-leukemia-a-phase-2-clinical-trial
#9
Elias Jabbour, Farhad Ravandi, Partow Kebriaei, Xuelin Huang, Nicholas J Short, Deborah Thomas, Koji Sasaki, Michael Rytting, Nitin Jain, Marina Konopleva, Guillermo Garcia-Manero, Richard Champlin, David Marin, Tapan Kadia, Jorge Cortes, Zeev Estrov, Koichi Takahashi, Yogin Patel, Maria R Khouri, Jovitta Jacob, Rebecca Garris, Susan O'Brien, Hagop Kantarjian
Importance: The outcome of patients with relapsed or refractory (R/R) acute lymphoblastic leukemia (ALL) is poor. Inotuzumab ozogamicin, a CD22 monoclonal antibody bound to calicheamicin, has single-agent activity in R/R ALL. Objective: To evaluate the efficacy and safety of inotuzumab ozogamicin plus low-intensity chemotherapy in patients with R/R ALL. Design, Setting, and Participants: A single-arm, phase 2 study of adults with R/R B-cell ALL conducted at The University of Texas MD Anderson Cancer Center, Houston...
August 31, 2017: JAMA Oncology
https://www.readbyqxmd.com/read/28841726/incidence-and-characterization-of-hypoesthesia-in-the-distribution-of-the-infrapatellar-branch-of-the-saphenous-nerve-after-anterior-cruciate-ligament-reconstruction-a-prospective-study-of-patient-reported-numbness
#10
Steven Brad Cohen, Russell Flato, Jocelyn Wascher, Ryan Watson, Matthew Salminen, Daniel O'Brien, Fotios Tjoumakaris, Michael Ciccotti
No abstract text is available yet for this article.
August 25, 2017: Journal of Knee Surgery
https://www.readbyqxmd.com/read/28841278/pharmacological-evaluation-of-novel-bioisosteres-of-an-adamantanyl-benzamide-p2x7-receptor-antagonist
#11
Shane M Wilkinson, Melissa L Barron, James O'Brien-Brown, Bieneke Janssen, Leanne Stokes, Eryn L Werry, Mansoor Chishty, Kristen K Skarratt, Jennifer A Ong, David E Hibbs, Danielle J Vugts, Stephen Fuller, Albert D Windhorst, Michael Kassiou
Adamantanyl benzamide 1 was identified as a potent P2X7R antagonist but failed to progress further due to poor metabolic stability. We describe the synthesis and SAR of a series of bioisosteres of benzamide 1 to explore improvements in the pharmacological properties of this lead. Initial efforts investigated a series of heteroaromatic bioisosteres, which demonstrated improved physicochemical properties but reduced P2X7R antagonism. Installation of bioisosteric fluorine on the adamantane bridgeheads was well tolerated and led to a series of bioisosteres with improved physicochemical properties and metabolic stability...
August 25, 2017: ACS Chemical Neuroscience
https://www.readbyqxmd.com/read/28833321/population-pharmacokinetic-meta-analysis-of-ramucirumab-in-cancer-patients
#12
Lisa O'Brien, Paul Westwood, Ling Gao, Michael Heathman
AIM: Ramucirumab is a human IgG1 monoclonal antibody that specifically binds vascular endothelial growth factor receptor-2 (VEGFR-2) and blocks binding of VEGF-A, VEGF-C, and VEGF-D. The objective of the analysis was to characterize the clinical pharmacology profile of ramucirumab using a population pharmacokinetic approach. METHODS: A total of 1639 patients with 6427 serum concentrations from 11 Phase 1b, 2, and 3 clinical trials in patients with various cancer indications were included in the analysis...
August 18, 2017: British Journal of Clinical Pharmacology
https://www.readbyqxmd.com/read/28829877/effect-of-ganciclovir-on-il-6-levels-among-cytomegalovirus-seropositive-adults-with-critical-illness-a-randomized-clinical-trial
#13
RANDOMIZED CONTROLLED TRIAL
Ajit P Limaye, Renee D Stapleton, Lili Peng, Scott R Gunn, Louise E Kimball, Robert Hyzy, Matthew C Exline, D Clark Files, Peter E Morris, Stephen K Frankel, Mark E Mikkelsen, Duncan Hite, Kyle B Enfield, Jay Steingrub, James O'Brien, Polly E Parsons, Joseph Cuschieri, Richard G Wunderink, David L Hotchkin, Ying Q Chen, Gordon D Rubenfeld, Michael Boeckh
Importance: The role of cytomegalovirus (CMV) reactivation in mediating adverse clinical outcomes in nonimmunosuppressed adults with critical illness is unknown. Objective: To determine whether ganciclovir prophylaxis reduces plasma interleukin 6 (IL-6) levels in CMV-seropositive adults who are critically ill. Design, Setting, and Participants: Double-blind, placebo-controlled, randomized clinical trial (conducted March 10, 2011-April 29, 2016) with a follow-up of 180 days (November 10, 2016) that included 160 CMV-seropositive adults with either sepsis or trauma and respiratory failure at 14 university intensive care units (ICUs) across the United States...
August 22, 2017: JAMA: the Journal of the American Medical Association
https://www.readbyqxmd.com/read/28822638/modified-anterolateral-portals-in-elbow-arthroscopy-a-cadaveric-study-on-safety
#14
Stephen Thon, Peter Gold, Lane Rush, Michael J O'Brien, Felix H Savoie
PURPOSE: To evaluate the proximity to the radial nerve on cadaveric specimens of 2 modified anterolateral portals used for elbow arthroscopy. METHODS: Ten fresh cadaveric elbow specimens were prepared. Four-millimeter Steinman pins were inserted into 3 anterolateral portal sites in relation to the lateral epicondyle: (1) the standard distal anterolateral portal, (2) a modified direct anterolateral portal, and (3) a modified proximal anterolateral portal. These were defined as follows: direct portals 2 cm directly anterior to the lateral epicondyle, and proximal portals 2 cm proximal and 2 cm directly anterior to the lateral epicondyle...
August 16, 2017: Arthroscopy: the Journal of Arthroscopic & related Surgery
https://www.readbyqxmd.com/read/28798068/consolidation-treatment-with-lenalidomide-following-front-line-or-salvage-chemoimmunotherapy-in-chronic-lymphocytic-leukemia
#15
Paolo Strati, Michael J Keating, Jan A Burger, Susan M O'Brien, William G Wierda, Zeev Estrov, Gracy Zacharian, Alessandra Ferrajoli
No abstract text is available yet for this article.
August 10, 2017: Haematologica
https://www.readbyqxmd.com/read/28792686/viral-surveillance-using-pcr-during-treatment-of-aml-and-all
#16
Stephanie B Dixon, Adam Lane, Maureen M O'Brien, Karen C Burns, Jennifer L Mangino, Erin H Breese, Michael J Absalon, John P Perentesis, Christine L Phillips
BACKGROUND: While viral surveillance of cytomegalovirus (CMV), Epstein-Barr virus (EBV), and adenovirus using PCR is routine in patients undergoing hematopoetic stem cell transplant and solid organ transplant, the utility in the nontransplant pediatric leukemia population is unknown. Our institution screens patients with acute lymphoblastic leukemia (ALL) and acute myeloid leukemia (AML) for viral DNAemia by PCR as part of clinical care. PROCEDURE: This retrospective chart review included patients treated for newly diagnosed or relapsed AML or ALL between April 2010 and September 2014...
August 9, 2017: Pediatric Blood & Cancer
https://www.readbyqxmd.com/read/28790169/disease-understanding-in-patients-newly-diagnosed-with-atrial-fibrillation
#17
Brystana G Kaufman, Sunghee Kim, Karen Pieper, Larry A Allen, Bernard J Gersh, Gerald V Naccarelli, Michael D Ezekowitz, Gregg C Fonarow, Kenneth W Mahaffey, Daniel E Singer, Paul S Chan, James V Freeman, Jack Ansell, Peter R Kowey, James A Rieffel, Jonathan Piccini, Eric Peterson, Emily C O'Brien
OBJECTIVE: To describe self-reported disease understanding for newly diagnosed patients with atrial fibrillation (AF) and assess (1) how disease understanding changes over the first 6 months after diagnosis and (2) the relationship between patient understanding of therapies at baseline and treatment receipt at 6 months among treatment-naïve patients. METHODS: We analysed survey data from SATELLITE (Survey of Patient Knowledge and Personal Priorities for Treatment), a substudy of patients with new-onset AF enrolled in the national Outcomes Registry for Better Informed Treatment of Atrial Fibrillation (ORBIT) II registry across 56 US sites...
August 8, 2017: Heart: Official Journal of the British Cardiac Society
https://www.readbyqxmd.com/read/28783501/high-risk-family-colorectal-cancer-screening-service-in-ireland-critical-review-of-clinical-outcomes
#18
Margaret Walshe, Robert Moran, Marie Boyle, Ion Cretu, Zita Galvin, Victoria Swan, Jason Trikovic, Michael P Farrell, Sinéad Foy, Loretta O'Brien, Jan Leyden, Niall Mulligan, Helen Fenlon, David J Gallagher, Padraic MacMathúna
BACKGROUND: We present the 15-year experience of a family colorectal cancer screening service in Ireland with emphasis on real life experience and outcomes. METHODS: Questionnaires were used to assess family cancer history and assign patients to risk categories; 'Moderate Risk', HNPCC, (suspected) genetic syndrome (non-HNPCC), 'Low Risk'. Screening was by full colonoscopy. We report neoplastic yield, examining effect of risk category, age, gender, and index colonoscopy findings...
August 4, 2017: Cancer Epidemiology
https://www.readbyqxmd.com/read/28780388/phosphatidylinositol-3-kinase-pi3k-modulates-manganese-homeostasis-and-manganese-induced-cell-signaling-in-a-murine-striatal-cell-line
#19
Miles R Bryan, Michael A Uhouse, Kristen D Nordham, Piyush Joshi, Daniel I R Rose, Michael T O'Brien, Michael Aschner, Aaron B Bowman
In a recent study, we found that blocking the protein kinase ataxia telangiectasia mutated (ATM) with the small molecule inhibitor (SMI) KU-55933 can completely abrogate Mn-induced phosphorylation of p53 at serine 15 (p-p53) in human induced pluripotent stem cell (hiPSC)-differentiated striatal neuroprogenitors. However, in the immortalized mouse striatal progenitor cell line STHdh(Q7/Q7), a concentration of KU55933 far exceeding its IC50 for ATM was required to inhibit Mn-induced p-p53. This suggested an alternative signaling system redundant with ATM kinase for activating p53 in this cell line- one that was altered by KU55933 at these higher concentrations (i...
August 2, 2017: Neurotoxicology
https://www.readbyqxmd.com/read/28751405/complete-genome-sequence-of-vibrio-gazogenes-atcc-43942
#20
Phani M Gummadidala, Michael E Holder, Jacqueline L O'Brien, Nadim J Ajami, Joseph F Petrosino, Chandrani Mitra, Yung Pin Chen, Alan W Decho, Anindya Chanda
Vibrio gazogenes ATCC 43942 has the potential to synthesize a plethora of metabolites which are of clinical and agricultural significance in response to environmental triggers. The complete genomic sequence of Vibrio gazogenes ATCC 43942 is reported herein, contributing to the knowledge base of strains in the Vibrio genus.
July 27, 2017: Genome Announcements
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