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https://www.readbyqxmd.com/read/28637347/mechanisms-underlying-the-long-term-survival-of-the-monocot-dracaena-marginata-under-drought-conditions
#1
Radek Jupa, Roman Plichta, Zuzana Paschová, Nadezhda Nadezhdina, Roman Gebauer
Efficient water management is essential for the survival of vascular plants under drought stress. While interrelations among drought stress, plant anatomy and physiological functions have been described in woody dicots, similar research is very limited for non-palm arborescent and shrubby monocots despite their generally high drought tolerance. In this study, potted transplants of Dracaena marginata Lam. in primary growth stage were exposed to several short- and long-term drought periods. Continuous measurements of sap flow and stem diameter, the evaluation of capacitance and leaf conductance, the quantification of non-structural carbohydrates (NSC), and organ-specific anatomical analyses were performed to reveal the mechanisms promoting plant resistance to limited soil moisture...
June 14, 2017: Tree Physiology
https://www.readbyqxmd.com/read/28637337/matrix-completion-with-side-information-and-its-applications-in-predicting-the-antigenicity-of-influenza-viruses
#2
Li Huang, Xianhong Li, Pengfei Guo, Yuhua Yao, Bo Liao, Weiwei Zhang, Fayou Wang, Jiasheng Yang, Yulong Zhao, Hailiang Sun, Pingan He, Jialiang Yang
Motivation: Low-rank matrix completion has been demonstrated to be powerful in predicting antigenic distances among influenza viruses and vaccines from partially revealed hemagglutination inhibition (HI) table. Meanwhile, influenza hemagglutinin (HA) protein sequences are also effective in inferring antigenic distances. Thus, it is natural to integrate HA protein sequence information into low-rank matrix completion model to help infer influenza antigenicity, which is critical to influenza vaccine development...
June 16, 2017: Bioinformatics
https://www.readbyqxmd.com/read/28637329/health-benefits-associated-with-three-helping-behaviors-evidence-for-incident-cardiovascular-disease
#3
Jeffrey A Burr, Saehwang Han, Hyo Jung Lee, Jane L Tavares, Jan E Mutchler
Objective: The purpose of this study was to investigate the association between three helping behaviors and incident cardiovascular disease (CVD; heart attack, stroke; fatal and nonfatal), with an exploration of gender differences. The study is framed within the caregiving system model. Helping others is argued to be an evolved characteristic of humans that yields beneficial health effects. Methods: Data were taken from the 2004-2014 waves of the Health and Retirement Study...
June 16, 2017: Journals of Gerontology. Series B, Psychological Sciences and Social Sciences
https://www.readbyqxmd.com/read/28637321/amino-acid-substrates-impose-polyamine-eif5a-or-hypusine-requirement-for-peptide-synthesis
#4
Byung-Sik Shin, Takayuki Katoh, Erik Gutierrez, Joo-Ran Kim, Hiroaki Suga, Thomas E Dever
Whereas ribosomes efficiently catalyze peptide bond synthesis by most amino acids, the imino acid proline is a poor substrate for protein synthesis. Previous studies have shown that the translation factor eIF5A and its bacterial ortholog EF-P bind in the E site of the ribosome where they contact the peptidyl-tRNA in the P site and play a critical role in promoting the synthesis of polyproline peptides. Using misacylated Pro-tRNAPhe and Phe-tRNAPro, we show that the imino acid proline and not tRNAPro imposes the primary eIF5A requirement for polyproline synthesis...
June 16, 2017: Nucleic Acids Research
https://www.readbyqxmd.com/read/28637296/omixcore-a-web-server-for-prediction-of-protein-interactions-with-large-rna
#5
Alexandros Armaos, Davide Cirillo, Gian Gaetano Tartaglia
Summary: Here we introduce omiXcore, a server for calculations of protein binding to large RNAs (> 500 nucleotides). Our webserver allows (i) use of both protein and RNA sequences without size restriction; (ii) pre-compiled library for exploration of human long intergenic RNAs (lincRNAs) interactions; (iii) prediction of binding sites. Results: omiXcore was trained and tested on enhanced UV Cross-Linking and ImmunoPrecipitation (eCLIP) data. The method discriminates interacting and non-interacting protein-RNA pairs and identifies RNA binding sites with Areas under the ROC curve > 0...
June 15, 2017: Bioinformatics
https://www.readbyqxmd.com/read/28637294/over-time-impacts-of-pictorial-health-warning-labels-and-their-differences-across-smoker-subgroups-results-from-adult-smokers-in-canada-and-australia
#6
Kamala Swayampakala, James F Thrasher, Hua-Hie Yong, Gera E Nagelhout, Lin Li, Ron Borland, David Hammond, Richard J O'Connor, James W Hardin
Introduction: This study examines patterns of change in different smoker subgroups' responses to new pictorial health warning labels (HWLs) over the initial, two year post-implementation period in Canada, where HWLs include package inserts with cessation messages, and Australia, where "plain" packaging (i.e., prohibition of brand imagery) was also implemented. Methods: Data were collected from online consumer panels in Canada (nsmokers=3,153; nobservations=5,826) and Australia (nsmokers=2,699; nobservations=5,818) from September 2012 to September 2014, with approximately 1,000 adult smokers surveyed in each country every four months, using replenishment to maintain sample size...
June 16, 2017: Nicotine & Tobacco Research: Official Journal of the Society for Research on Nicotine and Tobacco
https://www.readbyqxmd.com/read/28637270/in-planta-recapitulation-of-isoprene-synthases-evolution-from-ocimene-synthases
#7
Mingai Li, Jia Xu, Alberto Algarra Alarcon, Silvia Carlin, Enrico Barbaro, Luca Cappellin, Violeta Velikova, Urska Vrhovsek, Francesco Loreto, Claudio Varotto
Isoprene is the most abundant biogenic volatile hydrocarbon compound naturally emitted by plants and plays a major role in atmospheric chemistry. It has been proposed that isoprene synthases (IspS) may readily evolve from other terpene synthases, but this hypothesis has not been experimentally investigated.We isolated and functionally validated in Arabidopsis the first isoprene synthase gene, AdoIspS, from a monocotyledonous species (Arundo donax L., Poaceae). Phylogenetic reconstruction indicates that AdoIspS and dicots isoprene synthases most likely originated by parallel evolution from TPS-b monoterpene synthases...
June 16, 2017: Molecular Biology and Evolution
https://www.readbyqxmd.com/read/28637266/family-caregivers-of-older-adults-1999-2015-trends-in-characteristics-circumstances-and-role-related-appraisal
#8
Jennifer L Wolff, John Mulcahy, Jin Huang, David L Roth, Kenneth Covinsky, Judith D Kasper
Purpose of Study: To assess trends in family caregiving between 1999 and 2015. Design and Methods: We construct nationally representative profiles of community-dwelling older adults receiving help with self-care or indoor mobility and their "primary" family or unpaid caregiver using the 1999 and 2004 National Long Term Care Survey, 2011 and 2015 National Health and Aging Trends Study, and linked caregiver surveys. Trends are examined. Results: Older adults receiving help were incrementally younger, more racially diverse, and better educated in 2015...
June 16, 2017: Gerontologist
https://www.readbyqxmd.com/read/28637260/associations-of-obesity-and-lifestyle-with-the-risk-and-mortality-of-bloodstream-infection-in-a-general-population-a-15-year-follow-up-of-64%C3%A2-027-individuals-in-the-hunt-study
#9
Julie Paulsen, Åsa Askim, Randi Marie Mohus, Arne Mehl, Andrew Dewan, Erik Solligård, Jan Kristian Damås, Bjørn O Åsvold
Background: Bloodstream infections (BSI) cause considerable morbidity and mortality, and primary prevention should be a priority. Lifestyle factors are of particular interest since they represent a modifiable target. Methods: We conducted a prospective cohort study among participants in the population-based Norwegian HUNT2 Survey, where 64 027 participants were followed from 1995-97 through 2011 by linkage to prospectively recorded information on BSI at local and regional hospitals...
June 15, 2017: International Journal of Epidemiology
https://www.readbyqxmd.com/read/28637221/digital-direct-detection-of-micrornas-using-single-molecule-arrays
#10
Limor Cohen, Mark R Hartman, Aaron Amardey-Wellington, David R Walt
MicroRNAs (miRNAs) are involved in many biological pathways, and detecting miRNAs accurately is critical for diagnosing a variety of diseases including cancer. However, most current methods for miRNA detection require lengthy sample preparation and amplification steps that can bias the results. In addition, lack of specificity and reproducibility give rise to various challenges in detection of circulating miRNAs in biological samples. In this work, we applied the Single Molecule Array (Simoa) technique to develop an ultra-sensitive sandwich assay for direct detection of multiple miRNAs without pre-amplification...
June 20, 2017: Nucleic Acids Research
https://www.readbyqxmd.com/read/28637206/improving-combination-osteoporosis-therapy-in-a-preclinical-model-of-heightened-osteoanabolism
#11
Yu Shao, Selene Hernandez-Buquer, Paul Childress, Keith R Stayrook, Marta B Alvarez, Hannah Davis, Lilian Plotkin, Yongzheng He, Keith W Condon, David B Burr, Stuart J Warden, Alexander G Robling, Feng-Chun Yang, Ronald C Wek, Matthew R Allen, Joseph P Bidwell
Combining anti-catabolic agents with parathyroid hormone (PTH) to enhance bone mass has yielded mixed results in osteoporosis patients. Towards the goal of enhancing the efficacy of these regimens, we tested their utility in combination with loss of the transcription factor Nmp4 since disabling this gene amplifies PTH-induced increases in trabecular bone in mice by boosting osteoblast secretory activity. We addressed whether combining a sustained anabolic response with an anti-catabolic results in superior bone acquisition compared to PTH mono-therapy...
June 20, 2017: Endocrinology
https://www.readbyqxmd.com/read/28637195/at-issue-social-disconnection-in-schizophrenia-and-the-general-community
#12
Michael F Green, William P Horan, Junghee Lee, Amanda McCleery, L Felice Reddy, Jonathan K Wynn
Social disability is a defining characteristic of schizophrenia and a substantial public health problem. It has several components that are difficult to disentangle. One component, social disconnection, occurs extensively in the general community among nonhelp-seeking individuals. Social disconnection is an objective, long-standing lack of social/family relationships and minimal participation in social activities. It is associated with negative health effects, including early mortality, and is distinct from subjective loneliness...
June 20, 2017: Schizophrenia Bulletin
https://www.readbyqxmd.com/read/28637181/crosstalk-between-histone-modifications-indicates-that-inhibition-of-arginine-methyltransferase-carm1-activity-reverses-hiv-latency
#13
Zheng Zhang, Bryan C Nikolai, Leah A Gates, Sung Yun Jung, Edward B Siwak, Bin He, Andrew P Rice, Bert W O'Malley, Qin Feng
In eukaryotic cells, the gene expression status is strictly controlled by epigenetic modifications on chromatin. The repressive status of chromatin largely contributes to HIV latency. Studies have shown that modification of histone H3K27 acts as a key molecular switch for activation or suppression of many cellular genes. In this study, we found that K27-acetylated histone H3 specifically recruited Super Elongation Complex (SEC), the transcriptional elongation complex essential for HIV-1 long terminal repeat (LTR)-mediated and general cellular transcription...
June 20, 2017: Nucleic Acids Research
https://www.readbyqxmd.com/read/28637173/crystallographic-analyses-illustrate-significant-plasticity-and-efficient-recoding-of-meganuclease-target-specificity
#14
Rachel Werther, Jazmine P Hallinan, Abigail R Lambert, Kyle Havens, Mark Pogson, Jordan Jarjour, Roberto Galizi, Nikolai Windbichler, Andrea Crisanti, Tony Nolan, Barry L Stoddard
The retargeting of protein-DNA specificity, outside of extremely modular DNA binding proteins such as TAL effectors, has generally proved to be quite challenging. Here, we describe structural analyses of five different extensively retargeted variants of a single homing endonuclease, that have been shown to function efficiently in ex vivo and in vivo applications. The redesigned proteins harbor mutations at up to 53 residues (18%) of their amino acid sequence, primarily distributed across the DNA binding surface, making them among the most significantly reengineered ligand-binding proteins to date...
June 20, 2017: Nucleic Acids Research
https://www.readbyqxmd.com/read/28637152/how-physical-therapists-instruct-patients-with-stroke-an-observational-study-on-attentional-focus-during-gait-rehabilitation-after-stroke
#15
Elmar Kal, Henrieke van den Brink, Han Houdijk, John van der Kamp, Paulien Helena Goossens, Coen van Bennekom, Erik Scherder
PURPOSE: People without neurological impairments show superior motor learning when they focus on movement effects (external focus) rather than on movement execution itself (internal focus). Despite its potential for neurorehabilitation, it remains unclear to what extent external focus strategies are currently incorporated in rehabilitation post-stroke. Therefore, we observed how physical therapists use attentional focus when treating gait of rehabilitating patients with stroke. METHODS: Twenty physical therapist-patient couples from six rehabilitation centers participated...
February 24, 2017: Disability and Rehabilitation
https://www.readbyqxmd.com/read/28637144/what-information-do-patients-need-following-a-whiplash-injury-the-perspectives-of-patients-and-physiotherapists
#16
Annick Maujean, Joanna Sterling, Michele Sterling
PURPOSE: The aims of the present study were to identify information that individuals with whiplash associated disorders (WAD) need to know in the early stages of recovery and to establish whether there is a difference between what physiotherapists and whiplash-injured patients perceive as important information. METHOD: Forty-one participants were recruited (20 whiplash-injured patients, 21 physiotherapists). Participants were asked to provide five statements to one open-ended question about what they believe is the most important information individuals with WAD need to know in the early stages of recovery...
February 23, 2017: Disability and Rehabilitation
https://www.readbyqxmd.com/read/28637141/misconceptions-about-traumatic-brain-injury-among-probation-services
#17
Conall O'Rourke, Mark A Linden, Maria Lohan
PURPOSE: The prevalence of traumatic brain injury (TBI) among offender populations is significantly higher than among the general population. Despite this, no study has yet assessed the knowledge of members of the probation service surrounding TBI. METHOD: Knowledge was assessed among members of the Probation Board for Northern Ireland (PBNI) using a cross-sectional online version of the Common Misconceptions about TBI (CM-TBI) questionnaire. Mean total misconception scores, along with scores on four subdomains (recovery, sequelae, insight, and hidden injury) were calculated...
February 23, 2017: Disability and Rehabilitation
https://www.readbyqxmd.com/read/28637118/asymptomatic-chiari-type-i-malformation-should-patients-be-advised-against-participation-in-contact-sports
#18
Robert Spencer, Paul Leach
BACKGROUND: Chiari type I malformation (CM-I) is characterised by caudal displacement of the cerebellar tonsils through the foramen magnum, crowding the craniocervical junction. It is being increasingly diagnosed in asymptomatic patients due to the widespread availability of MRI, and there are case reports of these patients suffering sudden death or neurological injury following head or neck trauma, raising the issue of whether they should be prohibited from contact sport participation, given the likelihood of frequent trauma...
March 2, 2017: British Journal of Neurosurgery
https://www.readbyqxmd.com/read/28637106/-a-case-of-hemorrhage-of-an-esophageal-duplication-cyst-improved-by-endoscopic-drainage
#19
In Sub Han, Gwang Ha Kim, Seong Jun Lee, Bong Eun Lee, Hoseok I, Yeong Dae Kim
Esophageal duplication cyst is a rare congenital gastrointestinal malformation. It is the second most common duplication cyst following small bowel duplication cyst in the gastrointestinal tract. Patients with an esophageal duplication cyst are generally asymptomatic; however, some patients may present the following symptoms: dysphagia, chest pain, stridor, unproductive cough, and epigastric discomfort by compression of the surrounding structures. Surgical removal is the treatment of choice in symptomatic cases and can be considered in asymptomatic cases if they are at risk for developing complications, such as ulceration or perforation...
June 25, 2017: Korean Journal of Gastroenterology, Taehan Sohwagi Hakhoe Chi
https://www.readbyqxmd.com/read/28637091/nurse-managers-determinants-and-behaviours-in-relation-to-patient-and-visitor-aggression-in-general-hospitals-a-qualitative-study
#20
Birgit Heckemann, Karin A Peter, Ruud Jg Halfens, Jos Mga Schols, Gerjo Kok, Sabine Hahn
AIM: 'To explore nurse managers' behaviours, attitudes, perceived social norms and behavioural control in the prevention and management of patient and visitor aggression in general hospitals. BACKGROUND: Patient and visitor aggression in general hospitals is a global problem that incurs substantial human suffering and organizational cost. Managers are key persons for creating low-aggression environments, yet their role and behaviour in reducing patient and visitor aggression remains unexplored...
June 21, 2017: Journal of Advanced Nursing
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