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Michael O'Brien

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https://www.readbyqxmd.com/read/27878083/interactive-effects-between-plant-functional-types-and-soil-factors-on-tundra-species-diversity-and-community-composition
#1
Maitane Iturrate-Garcia, Michael J O'Brien, Olga Khitun, Samuel Abiven, Pascal A Niklaus, Gabriela Schaepman-Strub
Plant communities are coupled with abiotic factors, as species diversity and community composition both respond to and influence climate and soil characteristics. Interactions between vegetation and abiotic factors depend on plant functional types (PFT) as different growth forms will have differential responses to and effects on site characteristics. However, despite the importance of different PFT for community assembly and ecosystem functioning, research has mainly focused on vascular plants. Here, we established a set of observational plots in two contrasting habitats in northeastern Siberia in order to assess the relationship between species diversity and community composition with soil variables, as well as the relationship between vegetation cover and species diversity for two PFT (nonvascular and vascular)...
November 2016: Ecology and Evolution
https://www.readbyqxmd.com/read/27870563/economic-burden-of-chronic-lymphocytic-leukemia-in-the-era-of-oral-targeted-therapies-in-the-united-states
#2
Qiushi Chen, Nitin Jain, Turgay Ayer, William G Wierda, Christopher R Flowers, Susan M O'Brien, Michael J Keating, Hagop M Kantarjian, Jagpreet Chhatwal
Purpose Oral targeted therapies represent a significant advance for the treatment of patients with chronic lymphocytic leukemia (CLL); however, their high cost has raised concerns about affordability and the economic impact on society. Our objective was to project the future prevalence and cost burden of CLL in the era of oral targeted therapies in the United States. Methods We developed a simulation model that evaluated the evolving management of CLL from 2011 to 2025: chemoimmunotherapy (CIT) as the standard of care before 2014, oral targeted therapies for patients with del(17p) and relapsed CLL from 2014, and for first-line treatment from 2016 onward...
November 21, 2016: Journal of Clinical Oncology: Official Journal of the American Society of Clinical Oncology
https://www.readbyqxmd.com/read/27866083/neuroanatomical-differences-in-fast-and-slow-rat-strains-with-differential-vulnerability-to-kindling-and-behavioral-comorbidities
#3
Pragati Sharma, Stefanie Dedeurwaerdere, Michael A D Vandenberg, Ke Fang, Leigh A Johnston, Sandy R Shultz, Terence J O'Brien, Krista L Gilby
OBJECTIVE: The neurobiological factors underlying a predisposition towards developing epilepsy and its common behavioral comorbidities are poorly understood. FAST rats are a strain that has been selectively bred for enhanced vulnerability to kindling, while the SLOW strain has been bred to be resistant to kindling. FAST rats also exhibit behavioral traits reminiscent of those observed in neurodevelopmental disorders (autism spectrum disorder (ASD)/attention-deficit/hyperactivity disorder (ADHD)) commonly comorbid with epilepsy...
November 17, 2016: Epilepsy & Behavior: E&B
https://www.readbyqxmd.com/read/27856399/enhanced-laws-textures-a-potential-mri-surrogate-marker-of-hepatic-fibrosis-in-a-murine-model
#4
Baojun Li, Hernan Jara, Heishun Yu, Michael O'Brien, Jorge Soto, Stephan W Anderson
PURPOSE: To compare enhanced Laws textures derived from parametric proton density (PD) maps to other MRI surrogate markers (T2, PD, apparent diffusion coefficient (ADC)) in assessing degrees of liver fibrosis in an ex vivo murine model of hepatic fibrosis imaged using 11.7T MRI. METHODS: This animal study was IACUC approved. Fourteen male, C57BL/6 mice were divided into control and experimental groups. The latter were fed a 3,5-dicarbethoxy-1,4-dihydrocollidine (DDC) supplemented diet to induce hepatic fibrosis...
November 14, 2016: Magnetic Resonance Imaging
https://www.readbyqxmd.com/read/27850390/752-microglial-proliferation-in-the-piglet-brain-is-region-specific-after-cardiac-arrest
#5
Caitlin O'Brien, Michael Reyes, Polan Santos, Ewa Kulikowicz, Lee Martin, Raymond Koehler, Sujatha Kannan, Jennifer Lee
No abstract text is available yet for this article.
December 2016: Critical Care Medicine
https://www.readbyqxmd.com/read/27846905/rapamycin-regulates-autophagy-and-cell-adhesion-in-induced-pluripotent-stem-cells
#6
Areechun Sotthibundhu, Katya McDonagh, Alexander von Kriegsheim, Amaya Garcia-Munoz, Agnieszka Klawiter, Kerry Thompson, Kapil Dev Chauhan, Janusz Krawczyk, Veronica McInerney, Peter Dockery, Michael J Devine, Tilo Kunath, Frank Barry, Timothy O'Brien, Sanbing Shen
BACKGROUND: Cellular reprogramming is a stressful process, which requires cells to engulf somatic features and produce and maintain stemness machineries. Autophagy is a process to degrade unwanted proteins and is required for the derivation of induced pluripotent stem cells (iPSCs). However, the role of autophagy during iPSC maintenance remains undefined. METHODS: Human iPSCs were investigated by microscopy, immunofluorescence, and immunoblotting to detect autophagy machinery...
November 15, 2016: Stem Cell Research & Therapy
https://www.readbyqxmd.com/read/27846606/emergence-and-spread-of-a-human-transmissible-multidrug-resistant-nontuberculous-mycobacterium
#7
Josephine M Bryant, Dorothy M Grogono, Daniela Rodriguez-Rincon, Isobel Everall, Karen P Brown, Pablo Moreno, Deepshikha Verma, Emily Hill, Judith Drijkoningen, Peter Gilligan, Charles R Esther, Peadar G Noone, Olivia Giddings, Scott C Bell, Rachel Thomson, Claire E Wainwright, Chris Coulter, Sushil Pandey, Michelle E Wood, Rebecca E Stockwell, Kay A Ramsay, Laura J Sherrard, Timothy J Kidd, Nassib Jabbour, Graham R Johnson, Luke D Knibbs, Lidia Morawska, Peter D Sly, Andrew Jones, Diana Bilton, Ian Laurenson, Michael Ruddy, Stephen Bourke, Ian C J W Bowler, Stephen J Chapman, Andrew Clayton, Mairi Cullen, Owen Dempsey, Miles Denton, Maya Desai, Richard J Drew, Frank Edenborough, Jason Evans, Jonathan Folb, Thomas Daniels, Helen Humphrey, Barbara Isalska, Søren Jensen-Fangel, Bodil Jönsson, Andrew M Jones, Terese L Katzenstein, Troels Lillebaek, Gordon MacGregor, Sarah Mayell, Michael Millar, Deborah Modha, Edward F Nash, Christopher O'Brien, Deirdre O'Brien, Chandra Ohri, Caroline S Pao, Daniel Peckham, Felicity Perrin, Audrey Perry, Tania Pressler, Laura Prtak, Tavs Qvist, Ali Robb, Helen Rodgers, Kirsten Schaffer, Nadia Shafi, Jakko van Ingen, Martin Walshaw, Danie Watson, Noreen West, Joanna Whitehouse, Charles S Haworth, Simon R Harris, Diane Ordway, Julian Parkhill, R Andres Floto
Lung infections with Mycobacterium abscessus, a species of multidrug-resistant nontuberculous mycobacteria, are emerging as an important global threat to individuals with cystic fibrosis (CF), in whom M. abscessus accelerates inflammatory lung damage, leading to increased morbidity and mortality. Previously, M. abscessus was thought to be independently acquired by susceptible individuals from the environment. However, using whole-genome analysis of a global collection of clinical isolates, we show that the majority of M...
November 11, 2016: Science
https://www.readbyqxmd.com/read/27846391/instructive-role-of-mll-fusion-proteins-revealed-by-a-model-of-t-4-11-pro-b-acute-lymphoblastic-leukemia
#8
Shan Lin, Roger T Luo, Anetta Ptasinska, Jon Kerry, Salam A Assi, Mark Wunderlich, Toshihiko Imamura, Joseph J Kaberlein, Ahmad Rayes, Mark J Althoff, John Anastasi, Maureen M O'Brien, Amom Ruhikanta Meetei, Thomas A Milne, Constanze Bonifer, James C Mulloy, Michael J Thirman
The t(4;11)(q21;q23) fuses mixed-lineage leukemia (MLL) to AF4, the most common MLL-fusion partner. Here we show that MLL fused to murine Af4, highly conserved with human AF4, produces high-titer retrovirus permitting efficient transduction of human CD34(+) cells, thereby generating a model of t(4;11) pro-B acute lymphoblastic leukemia (ALL) that fully recapitulates the immunophenotypic and molecular aspects of the disease. MLL-Af4 induces a B ALL distinct from MLL-AF9 through differential genomic target binding of the fusion proteins leading to specific gene expression patterns...
November 14, 2016: Cancer Cell
https://www.readbyqxmd.com/read/27826923/circulating-micrornas-in-cancer
#9
Killian P O'Brien, Eimear Ramphul, Linda Howard, William M Gallagher, Carmel Malone, Michael J Kerin, Róisín M Dwyer
It is believed that microRNAs have potential as circulating biomarkers of disease; however, successful clinical implementation remains a challenge. This chapter highlights broad variations in approaches to microRNA analysis where whole blood, serum and plasma have each been employed as viable sources. Further discrepancies in approaches are seen in endogenous controls and extraction methods utilized. This has resulted in contradictory publications, even when the same microRNA is targeted in the same disease setting...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/27820132/renal-tumors-in-children-younger-than-12-months-of-age-a-65-year-single-institution-review
#10
Margaret G Lamb, Jennifer H Aldrink, Sarah H O'Brien, Han Yin, Michael A Arnold, Mark A Ranalli
Wilms tumor (WT) is the most prevalent pediatric renal tumor and most commonly occurs between ages 1 and 5 years. Data are lacking on children younger than 12 months with renal tumors. The cancer registry at the authors' institution was queried to identify patients 12 months and younger with renal masses. Demographics, clinical presentation, histopathology, stage, and survival outcomes were reviewed. The most common presenting symptoms included an asymptomatic abdominal mass (73%) and hematuria (9%). Histopathology revealed WT in 73% of patients, mesoblastic nephroma in 20%...
November 4, 2016: Journal of Pediatric Hematology/oncology
https://www.readbyqxmd.com/read/27811175/blastocystis-mitochondrial-genomes-appear-to-show-multiple-independent-gains-and-losses-of-start-and-stop-codons
#11
Alison S Jacob, Lee O'Brien Andersen, Paulina Pavinski Bitar, Vincent P Richards, Sarah Shah, Michael J Stanhope, C Rune Stensvold, C Graham Clark
Complete mitochondrion-related organelle (MRO) genomes of several subtypes (STs) of the unicellular stramenopile Blastocystis are presented. Complete conservation of gene content and synteny in gene order is observed across all MRO genomes, comprising 27 protein coding genes, 2 ribosomal RNA genes and 16 transfer RNA (tRNA) genes. Despite the synteny, differences in the degree of overlap between genes was observed between subtypes and also between isolates within the same subtype. Other notable features include unusual base-pairing mismatches in the predicted secondary structures of some tRNAs...
November 3, 2016: Genome Biology and Evolution
https://www.readbyqxmd.com/read/27807202/estrogens-and-androgens-in-skeletal-physiology-and-pathophysiology
#12
REVIEW
Maria Almeida, Michaël R Laurent, Vanessa Dubois, Frank Claessens, Charles A O'Brien, Roger Bouillon, Dirk Vanderschueren, Stavros C Manolagas
Estrogens and androgens influence the growth and maintenance of the mammalian skeleton and are responsible for its sexual dimorphism. Estrogen deficiency at menopause or loss of both estrogens and androgens in elderly men contribute to the development of osteoporosis, one of the most common and impactful metabolic diseases of old age. In the last 20 years, basic and clinical research advances, genetic insights from humans and rodents, and newer imaging technologies have changed considerably the landscape of our understanding of bone biology as well as the relationship between sex steroids and the physiology and pathophysiology of bone metabolism...
January 2017: Physiological Reviews
https://www.readbyqxmd.com/read/27807080/dementia-and-imagination-a-mixed-methods-protocol-for-arts-and-science-research
#13
Gill Windle, Andrew Newman, Vanessa Burholt, Bob Woods, Dave O'Brien, Michael Baber, Barry Hounsome, Clive Parkinson, Victoria Tischler
INTRODUCTION: Dementia and Imagination is a multidisciplinary research collaboration bringing together arts and science to address current evidence limitations around the benefits of visual art activities in dementia care. The research questions ask: Can art improve quality of life and well-being? If it does make a difference, how does it do this-and why? Does it have wider social and community benefits? METHODS AND ANALYSIS: This mixed-methods study recruits participants from residential care homes, National Health Service (NHS) wards and communities in England and Wales...
November 2, 2016: BMJ Open
https://www.readbyqxmd.com/read/27802969/ibrutinib-efficacy-and-tolerability-in-patients-with-relapsed-chronic-lymphocytic-leukemia-following-allogeneic-hct
#14
Christine E Ryan, Bita Sahaf, Aaron C Logan, Susan O'Brien, John C Byrd, Peter Hillmen, Jennifer R Brown, Martin J S Dyer, Anthony R Mato, Michael J Keating, Samantha Jaglowski, Fong Clow, Andrew R Rezvani, Lori Styles, Steven E Coutre, David B Miklos
Ibrutinib, a potent and irreversible small molecule inhibitor of both Bruton's tyrosine kinase (BTK) and interleukin-2 inducible kinase (ITK), has been used to treat relapsed/refractory chronic lymphocytic leukemia (CLL) with prolongation of progression-free and overall survival. Here we present 27 patients with relapsed CLL following allogeneic hematopoietic cell transplantation who subsequently received ibrutinib salvage therapy. Sixteen of these patients were part of multi-institutional clinical trials and achieved an overall response rate of 87...
November 1, 2016: Blood
https://www.readbyqxmd.com/read/27799834/a-comparison-of-functional-outcomes-in-patients-undergoing-revision-arthroscopic-repair-of-massive-rotator-cuff-tears-with-and-without-arthroscopic-suprascapular-nerve-release
#15
Felix H Savoie, Mark Zunkiewicz, Larry D Field, William H Replogle, Michael J O'Brien
PURPOSE: This study was designed to compare functional outcomes in patients undergoing revision repair of massive rotator cuff tears (retracted medial to the glenoid) with Goutallier Grade 4 atrophy and concomitant release of the suprascapular nerve to a similar group of patients with Grade 3 atrophy undergoing revision rotator cuff repair (RTCR) without nerve release. We hypothesized that patients undergoing nerve release would have more favorable functional outcomes as measured by the Modified University of California at Los Angeles shoulder rating scale (UCLA)...
2016: Open Access Journal of Sports Medicine
https://www.readbyqxmd.com/read/27797975/long-term-follow-up-of-treatment-with-ibrutinib-and-rituximab-ir-in-patients-with-high-risk-chronic-lymphocytic-leukemia-cll
#16
Preetesh Jain, Michael J Keating, William Wierda, Mariela Sivina, Philip A Thompson, Alessandra Ferrajoli, Zeev Estrov, Hagop Kantarjian, Susan O'Brien, Jan Burger
BACKGROUND: Ibrutinib is an active therapy with acceptable safety profile for patients with CLL, including high-risk patients with del17p or with TP53 mutations. Ibrutinib is broadly indicated for the treatment of patients with chronic lymphocytic leukemia and specifically including those with 17p deletion. The optimal use of ibrutinib in combination with other agents, remains controversial. METHODS: We report the long term outcome [median follow up of 47 months (range 36-51 months)] of 40 patients with high risk CLL, treated on the first ibrutinib combination trial with rituximab (IR)...
October 19, 2016: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research
https://www.readbyqxmd.com/read/27787540/effect-of-oral-voriconazole-on-fungal-keratitis-in-the-mycotic-ulcer-treatment-trial-ii-mutt-ii-a-randomized-clinical-trial
#17
N Venkatesh Prajna, Tiruvengada Krishnan, Revathi Rajaraman, Sushila Patel, Muthiah Srinivasan, Manoranjan Das, Kathryn J Ray, Kieran S O'Brien, Catherine E Oldenburg, Stephen D McLeod, Michael E Zegans, Travis C Porco, Nisha R Acharya, Thomas M Lietman, Jennifer Rose-Nussbaumer
Objective: To compare oral voriconazole with placebo in addition to topical antifungals in the treatment of filamentous fungal keratitis. Design, Setting, and Participants: The Mycotic Ulcer Treatment Trial II (MUTT II), a multicenter, double-masked, placebo-controlled, randomized clinical trial, was conducted in India and Nepal, with 2133 individuals screened for inclusion. Patients with smear-positive filamentous fungal ulcers and visual acuity of 20/400 (logMAR 1...
October 27, 2016: JAMA Ophthalmology
https://www.readbyqxmd.com/read/27754041/os-13-07-disparate-effect-of-early-wave-reflection-in-aortic-pressure-and-aortic-flow-velocity-waveform
#18
Audrey Adji, Thomas Weber, Caroline O'Brien, Michael O'Rourke, Alberto Avolio
OBJECTIVE: Previous studies have shown the reciprocal effects of wave reflection on aortic pressure and aortic flow waves. Invasive (Electro-Magnetic (EM)) and non-invasive (Cardiac Magnetic Resonance (CMR)) studies of aortic blood flow have shown characteristic aging changes as reduction in late systolic flow, which corresponds in time to the late systolic boost of aortic pressure. These are not always apparent in Doppler flow tracings. DESIGN AND METHOD: This study aimed to better understand the mechanisms of aortic pressure and flow changes due to early wave reflection and stiffening of arteries...
September 2016: Journal of Hypertension
https://www.readbyqxmd.com/read/27754040/os-13-06-generation-of-aortic-flow-velocity-from-derived-aortic-pressure-waveforms-using-age-specific-aortic-impedance-modelling
#19
Audrey Adji, Thomas Weber, Caroline O'Brien, Michael O'Rourke, Alberto Avolio
OBJECTIVE: Relative ease of estimating of Ascending Aortic (AA) pressure non-invasively enables interpretation of age-related pressure waveform changes due to altered pulse wave propagation. AA flow velocity waveforms, measured invasively by ElectroMagnetic (EM) cuff/ catheter, and non-invasively by Cardiac Magnetic Resonance (CMR) also show characteristic aging changes attributable to aortic dilation and subtle impairment of Left Ventricular (LV) function. Conventional Doppler waveforms do not...
September 2016: Journal of Hypertension
https://www.readbyqxmd.com/read/27743074/well-differentiated-non-functional-non-ampullary-duodenal-neuroendocrine-tumors-toward-defining-evaluation-and-management
#20
Timothy Weatherall, Jason Denbo, John Sharpe, Michael Martin, Thomas O'Brien, Rajib Gupta, Kenneth Groshart, Stephen Behrman, Paxton Dickson
INTRODUCTION: Nonfunctional, non-ampullary duodenal neuroendocrine tumors (dNETs) are rare neoplasms, and specific treatment recommendations are less clear than for other NETs. MATERIALS AND METHODS: We performed a retrospective review of patients (pts) with a diagnosis of dNET, excluding hormonally functional, ampullary, and high-grade tumors. Clinical data were evaluated to identify factors that might impact clinical staging and predictors of metastases. RESULTS: Thirty-six pts were identified...
October 14, 2016: World Journal of Surgery
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