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https://www.readbyqxmd.com/read/28813042/the-carotenoid-pathway-what-is-important-for-excitation-quenching-in-plant-antenna-complexes
#1
Kieran F Fox, Vytautas Balevičius, Jevgenij Chmeliov, Leonas Valkunas, Alexander V Ruban, Christopher D P Duffy
Plant light-harvesting is regulated by the Non-Photochemical Quenching (NPQ) mechanism involving the reversible formation of excitation quenching sites in the Photosystem II (PSII) antenna in response to high light. While the major antenna complex, LHCII, is known to be a site of NPQ, the precise mechanism of excitation quenching is not clearly understood. A preliminary model of the quenched crystal structure of LHCII implied that quenching arises from slow energy capture by Car pigments. It predicted a thoroughly quenched system but offered little insight into the defining aspects of this quenching...
August 16, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28812668/evolutionary-transitions-towards-eusociality-in-snapping-shrimps
#2
Solomon Tin Chi Chak, J Emmett Duffy, Kristin M Hultgren, Dustin R Rubenstein
Animal social organization varies from complex societies where reproduction is dominated by a single individual (eusociality) to those where reproduction is more evenly distributed among group members (communal breeding). Yet, how simple groups transition evolutionarily to more complex societies remains unclear. Competing hypotheses suggest that eusociality and communal breeding are alternative evolutionary endpoints, or that communal breeding is an intermediate stage in the transition towards eusociality. We tested these alternative hypotheses in sponge-dwelling shrimps, Synalpheus spp...
March 20, 2017: Nature ecology & evolution
https://www.readbyqxmd.com/read/28812327/design-and-synthesis-of-terephthalic-acid-based-histone-deacetylase-inhibitors-with-dual-stage-anti-plasmodium-activity
#3
Katharina Stenzel, Ming Jang Chua, Sandra Duffy, Yevgeniya Antonova-Koch, Stephan Meister, Alexandra Hamacher, Matthias U Kassack, Elizabeth A Winzeler, Vicky M Avery, Thomas Kurz, Katherine T Andrews, Finn Kristian Hansen
In this work we aimed to develop parasite-selective HDAC inhibitors with activity against the disease-causing asexual blood stages of Plasmodium as well as causal prophylactic and/or transmission blocking properties. We report the design, synthesis and biological testing of a series of 13 terephthalic acid-based histone deacetylase inhibitors. All compounds showed low cytotoxicity against human embryonic kidney (HEK293) cells (IC50 8 - >51 µM), with 11 also having sub-micromolar in vitro activity against drug-sensitive (3D7) and multi-drug resistant (Dd2) asexual blood stage Plasmodium falciparum parasites (IC50 ~ 0...
August 15, 2017: ChemMedChem
https://www.readbyqxmd.com/read/28808258/hexahydroquinolines-are-antimalarial-candidates-with-potent-blood-stage-and-transmission-blocking-activity
#4
Manu Vanaerschot, Leonardo Lucantoni, Tao Li, Jill M Combrinck, Andrea Ruecker, T R Santha Kumar, Kelly Rubiano, Pedro E Ferreira, Giulia Siciliano, Sonia Gulati, Philipp P Henrich, Caroline L Ng, James M Murithi, Victoria C Corey, Sandra Duffy, Ori J Lieberman, M Isabel Veiga, Robert E Sinden, Pietro Alano, Michael J Delves, Kim Lee Sim, Elizabeth A Winzeler, Timothy J Egan, Stephen L Hoffman, Vicky M Avery, David A Fidock
Antimalarial compounds with dual therapeutic and transmission-blocking activity are desired as high-value partners for combination therapies. Here, we report the identification and characterization of hexahydroquinolines (HHQs) that show low nanomolar potency against both pathogenic and transmissible intra-erythrocytic forms of the malaria parasite Plasmodium falciparum. This activity translates into potent transmission-blocking potential, as shown by in vitro male gamete formation assays and reduced oocyst infection and prevalence in Anopheles mosquitoes...
August 14, 2017: Nature Microbiology
https://www.readbyqxmd.com/read/28806955/reducing-the-socioeconomic-gradient-in-uptake-of-the-nhs-bowel-cancer-screening-programme-using-a-simplified-supplementary-information-leaflet-a-cluster-randomised-trial
#5
Samuel G Smith, Jane Wardle, Wendy Atkin, Rosalind Raine, Lesley M McGregor, Gemma Vart, Steve Morris, Stephen W Duffy, Susan Moss, Allan Hackshaw, Stephen Halloran, Ines Kralj-Hans, Rosemary Howe, Julia Snowball, Graham Handley, Richard F Logan, Sandra Rainbow, Steve Smith, Mary Thomas, Nicholas Counsell, Christian von Wagner
BACKGROUND: Uptake of colorectal cancer screening is low in the English NHS Bowel Cancer Screening Programme (BCSP). Participation in screening is strongly associated with socioeconomic status. The aim of this study was to determine whether a supplementary leaflet providing the 'gist' of guaiac-based Faecal Occult Blood test (gFOBt) screening for colorectal cancer could reduce the socioeconomic status (SES) gradient in uptake in the English NHS BCSP. METHODS: The trial was integrated within routine BCSP operations in November 2012...
August 14, 2017: BMC Cancer
https://www.readbyqxmd.com/read/28804644/a-malaria-vaccine-protects-aotus-monkeys-against-virulent-plasmodium-falciparum-infection
#6
Prakash Srinivasan, G Christian Baldeviano, Kazutoyo Miura, Ababacar Diouf, Julio A Ventocilla, Karina P Leiva, Luis Lugo-Roman, Carmen Lucas, Sachy Orr-Gonzalez, Daming Zhu, Eileen Villasante, Lorraine Soisson, David L Narum, Susan K Pierce, Carole A Long, Carter Diggs, Patrick E Duffy, Andres G Lescano, Louis H Miller
The Plasmodium falciparum protein, apical membrane antigen 1 forms a complex with another parasite protein, rhoptry neck protein 2, to initiate junction formation with the erythrocyte and is essential for merozoite invasion during the blood stage of infection. Consequently, apical membrane antigen 1 has been a target of vaccine development but vaccination with apical membrane antigen 1 alone in controlled human malaria infections failed to protect and showed limited efficacy in field trials. Here we show that vaccination with AMA1-RON2L complex in Freund's adjuvant protects Aotus monkeys against a virulent Plasmodium falciparum infection...
2017: NPJ Vaccines
https://www.readbyqxmd.com/read/28803445/a-systematic-review-of-primary-outcomes-and-outcome-measure-reporting-in-randomized-trials-evaluating-treatments-for-pre-eclampsia
#7
REVIEW
James M N Duffy, Martin Hirsch, Chris Gale, Louise Pealing, Anusuya Kawsar, Marian Showell, Paula R Williamson, Khalid S Khan, Sue Ziebland, Richard J McManus
BACKGROUND: An evaluation of outcome reporting is required to develop a core outcome set. OBJECTIVES: To assess primary outcomes and outcome measure reporting in pre-eclampsia trials. SEARCH STRATEGY: Five online databases were searched from inception to January 2016 using terms including "pre-eclampsia" and "randomized controlled trial". SELECTION CRITERIA: Randomized controlled trials evaluating treatments for pre-eclampsia published in any language were included...
August 13, 2017: International Journal of Gynaecology and Obstetrics
https://www.readbyqxmd.com/read/28800732/the-duffy-binding-protein-pkdbp%C3%AE-ii-of-plasmodium-knowlesi-from-peninsular-malaysia-and-malaysian-borneo-show-different-binding-activity-level-to-human-erythrocytes
#8
Khai Lone Lim, Amirah Amir, Yee Ling Lau, Mun Yik Fong
BACKGROUND: The zoonotic Plasmodium knowlesi is a major cause of human malaria in Malaysia. This parasite uses the Duffy binding protein (PkDBPαII) to interact with the Duffy antigen receptor for chemokines (DARC) receptor on human and macaque erythrocytes to initiate invasion. Previous studies on P. knowlesi have reported distinct Peninsular Malaysia and Malaysian Borneo PkDBPαII haplotypes. In the present study, the differential binding activity of these haplotypes with human and macaque (Macaca fascicularis) erythrocytes was investigated...
August 11, 2017: Malaria Journal
https://www.readbyqxmd.com/read/28797954/attachment-style-and-suicide-behaviors-in-high-risk-psychiatric-inpatients-following-hospital-discharge-the-mediating-role-of-entrapment
#9
Shuang Li, Igor I Galynker, Jessica Briggs, Molly Duffy, Anna Frechette-Hagan, Hae-Joon Kim, Lisa J Cohen, Zimri S Yaseen
Insecure attachment is associated with suicidal behavior. This relationship and its possible mediators have not been examined in high-risk psychiatric inpatients with respect to the critical high-risk period following hospital discharge. Attachment styles and perception of entrapment were assessed in 200 high-risk adult psychiatric inpatients hospitalized following suicidal ideation or suicide attempt. Suicidal behaviors were evaluated with the Columbia Suicide Severity Rating Scale at 1-2 months post-discharge...
August 2, 2017: Psychiatry Research
https://www.readbyqxmd.com/read/28797607/trends-and-clinical-outcomes-in-patients-undergoing-primary-percutaneous-revascularisation-for-st-elevation-myocardial-infarction-a-single-centre-experience
#10
Luke P Dawson, Josephine Warren, Juan Mundisugih, Viveka Nainani, William Chan, Dion Stub, Archer Broughton, Andrew J Taylor, Antony Walton, Stephen J Duffy, James A Shaw
BACKGROUND: Primary percutaneous coronary intervention (PPCI) is the preferred therapy for patients presenting with ST-elevation myocardial infarction (STEMI). We reviewed patients undergoing PCI for STEMI over a six-year period to evaluate changes in procedural characteristics and clinical outcomes given recent changes to STEMI guidelines. METHODS: All patients presenting to the Alfred Hospital, a tertiary referral hospital, between 1 January 2010 and 31 December 2015 undergoing PCI for STEMI were identified...
July 14, 2017: Heart, Lung & Circulation
https://www.readbyqxmd.com/read/28797351/implant-and-midterm-outcomes-of-the-subcutaneous-implantable-cardioverter-defibrillator-registry-the-effortless-study
#11
Lucas Boersma, Craig Barr, Reinoud Knops, Dominic Theuns, Lars Eckardt, Petr Neuzil, Marcoen Scholten, Margaret Hood, Juergen Kuschyk, Paul Jones, Elizabeth Duffy, Michael Husby, Kenneth Stein, Pier D Lambiase
BACKGROUND: The subcutaneous implantable cardioverter-defibrillator (S-ICD) was developed to defibrillate ventricular arrhythmias, avoiding drawbacks of transvenous leads. The global EFFORTLESS S-ICD (Evaluation oF FactORs ImpacTing CLinical Outcome and Cost EffectiveneSS of the S-ICD) registry is collecting outcomes in 985 patients during a 5-year follow-up. OBJECTIVES: The primary goal of the EFFORTLESS registry is to determine the safety of the S-ICD by evaluating complications and inappropriate shock rate...
August 15, 2017: Journal of the American College of Cardiology
https://www.readbyqxmd.com/read/28795506/oral-apolipoprotein-a-i-mimetic-d-4f-lowers-hdl-inflammatory-index-in-high-risk-patients-a-first-in-human-multiple-dose-randomized-controlled-trial
#12
Richard L Dunbar, Rajesh Movva, LeAnne T Bloedon, Danielle Duffy, Robert B Norris, Mohamad Navab, Alan M Fogelman, Daniel J Rader
A single dose of the apolipoprotein (apo)A-I mimetic peptide D-4F rendered high-density lipoprotein (HDL) less inflammatory, motivating the first multiple-dose study. We aimed to assess safety/tolerability, pharmacokinetics, and pharmacodynamics of daily, orally administered D-4F. High-risk coronary heart disease (CHD) subjects added double-blinded placebo or D-4F to statin for 13 days, randomly assigned 1:3 to ascending cohorts of 100, 300, then 500 mg (n = 62; 46 men/16 women). D-4F was safe and well-tolerated...
August 9, 2017: Clinical and Translational Science
https://www.readbyqxmd.com/read/28793793/making-oncolytic-virotherapy-a-clinical-reality-the-european-contribution
#13
Margaret R Duffy, Kerry D Fisher, Leonard W Seymour
Oncolytic viruses are quickly moving toward the forefront of modern medicines. The reward for the decades of research invested into developing viral platforms that selectively replicate in and lyse tumour cells whilst sparking anti-cancer adaptive immunity, is presenting in the form of durable therapeutic responses. Whilst it has certainly been a concerted global effort, in this review for the 25th anniversary of the ESGCT we will describe the current status of the major classes of oncolytic viruses, and focus on the contributions made by European researchers...
August 10, 2017: Human Gene Therapy
https://www.readbyqxmd.com/read/28792938/m-6-a-mrna-methylation-controls-t-cell-homeostasis-by-targeting-the-il-7-stat5-socs-pathways
#14
Hua-Bing Li, Jiyu Tong, Shu Zhu, Pedro J Batista, Erin E Duffy, Jun Zhao, Will Bailis, Guangchao Cao, Lina Kroehling, Yuanyuan Chen, Geng Wang, James P Broughton, Y Grace Chen, Yuval Kluger, Matthew D Simon, Howard Y Chang, Zhinan Yin, Richard A Flavell
N(6)-methyladenosine (m(6)A) is the most common and abundant messenger RNA modification, modulated by 'writers', 'erasers' and 'readers' of this mark. In vitro data have shown that m(6)A influences all fundamental aspects of mRNA metabolism, mainly mRNA stability, to determine stem cell fates. However, its in vivo physiological function in mammals and adult mammalian cells is still unknown. Here we show that the deletion of m(6)A 'writer' protein METTL3 in mouse T cells disrupts T cell homeostasis and differentiation...
August 9, 2017: Nature
https://www.readbyqxmd.com/read/28789734/new-paths-to-professional-nursing-using-encouragement-to-prepare-a-minority-workforce-to-enter-the-nursing-profession
#15
Elisheba Haqq-Stevens, Kathleen E Zavotsky, Sarah Kelly, Christopher Duffy, Claudia Pagani, Myrna Young, Lori Colineri
The current professional nursing workforce in the United States is predominantly White and female, even though minorities compose 33% of the national population (Travers, Smaldone, & Cohn, 2015). Minority patients are more effectively cared for when their particular cultural milieu is taken into consideration as part of their health care plan (Sullivan, 2004). According to the Agency for Healthcare Research and Quality (AHRQ), health care quality remains suboptimal for diverse populations in the United States because some individuals do not receive quality care or do not believe their values are honored or respected (AHRQ, 2016)...
August 1, 2017: Creative Nursing
https://www.readbyqxmd.com/read/28782407/evaluation-of-pegfilgrastim-use-at-an-academic-medical-center
#16
Kathy Tang, Alison Duffy, Steven Gilmore
Purpose Pegfilgrastim is indicated to reduce the risk of febrile neutropenia. As a cost-savings initiative, Pegfilgrastim Process Guidelines were developed and implemented at a large, academic teaching institution to improve appropriate use of pegfilgrastim and to decrease costs of outpatient infusion center administration by deferring doses to home self-administration for eligible patients. Methods A retrospective medical record review was conducted post-implementation of the Pegfilgrastim Process Guideline to evaluate the use of pegfilgrastim and to assess the safety and efficacy of transferring pegfilgrastim orders from outpatient infusion center to home administration for eligible patients...
January 1, 2017: Journal of Oncology Pharmacy Practice
https://www.readbyqxmd.com/read/28780034/impact-of-aspirin-and-clopidogrel-hyporesponsiveness-in-patients-treated%C3%A2-with-drug-eluting-stents-2-year-results-of-a-prospective-multicenter-registry-study
#17
Thomas D Stuckey, Ajay J Kirtane, Bruce R Brodie, Bernhard Witzenbichler, Claire Litherland, Giora Weisz, Michael J Rinaldi, Franz-Josef Neumann, D Christopher Metzger, Timothy D Henry, David A Cox, Peter L Duffy, Ernest L Mazzaferri, Paul A Gurbel, Roxana Mehran, Philippe Généreux, Ori Ben-Yehuda, Charles A Simonton, Gregg W Stone
OBJECTIVES: In this analysis of 2-year outcomes in the ADAPT-DES (Assessment of Dual AntiPlatelet Therapy with Drug-Eluting Stents) study, the authors sought to examine the independent associations between platelet reactivity to both aspirin and clopidogrel and subsequent outcomes. BACKGROUND: The relationship between platelet reactivity and long-term adverse events following implantation of drug-eluting stents (DES) has been incompletely characterized. METHODS: The ADAPT-DES study was a multicenter registry of patients undergoing routine platelet function testing following percutaneous coronary intervention with DES...
July 27, 2017: JACC. Cardiovascular Interventions
https://www.readbyqxmd.com/read/28776934/development-of-genome-and-transcriptome-derived-microsatellites-in-related-species-of-snapping-shrimps-with-highly-duplicated-genomes
#18
Kaitlyn M Gaynor, Joseph W Solomon, Stefanie Siller, Linnet Jessell, J Emmett Duffy, Dustin R Rubenstein
Molecular markers are powerful tools for studying patterns of relatedness and parentage within populations and for making inferences about social evolution. However, the development of molecular markers for simultaneous study of multiple species presents challenges, particularly when species exhibit genome duplication or polyploidy. We developed microsatellite markers for Synalpheus shrimp, a genus in which species exhibit not only great variation in social organization, but also interspecific variation in genome size and partial genome duplication...
August 4, 2017: Molecular Ecology Resources
https://www.readbyqxmd.com/read/28776700/significant-range-extensions-for-two-fish-species-at-pitcairn-island-south-pacific
#19
H J Duffy, T B Letessier, R A Irving
A baited videographic survey at Pitcairn Island has significantly extended the known range for two reef-fish species: blue-lined triggerfish Xanthichthys caeruleolineatus and greater amberjack Seriola dumerili, with an additional minor extension noted for giant trevally Caranx ignobilis. This highlights the importance of further research in this remote, poorly studied island group and provides evidence supplementing the understanding of oceanographic patterns in the South Pacific.
August 2017: Journal of Fish Biology
https://www.readbyqxmd.com/read/28774427/synthesis-of-antimalarial-amide-analogues-based-on-the-plant-serrulatane-diterpenoid-3-7-8-trihydroxyserrulat-14-en-19-oic-acid
#20
Rohitesh Kumar, Sandra Duffy, Vicky M Avery, Rohan A Davis
A plant-derived natural product scaffold, 3,7,8-trihydroxyserrulat-14-en-19-oic acid (1) was isolated in high yield from the aerial parts of the endemic Australian desert plant Eremophila microtheca. This scaffold (1) was subsequently used in the generation of a series of new amide analogues via a one-pot mixed anhydride amidation using pivaloyl chloride. The structures of all analogues were characterized using MS, NMR, and UV data. The major serrulatane natural products (1-3), isolated from the plant extract, and all amide analogues (6-15) together with several pivaloylated derivatives of 3,7,8-trihydroxyserrulat-14-en-19-oic acid (16-18) were evaluated for their antimalarial activity against 3D7 (chloroquine sensitive) and Dd2 (chloroquine resistant) Plasmodium falciparum strains, and preliminary cytotoxicity data were also acquired using the human embryonic kidney cell line HEK293...
July 15, 2017: Bioorganic & Medicinal Chemistry Letters
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