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https://www.readbyqxmd.com/read/28107502/rnai-based-functional-genomics-identifies-new-virulence-determinants-in-mucormycosis
#1
Trung Anh Trieu, María Isabel Navarro-Mendoza, Carlos Pérez-Arques, Marta Sanchis, Javier Capilla, Patricia Navarro-Rodriguez, Loida Lopez-Fernandez, Santiago Torres-Martínez, Victoriano Garre, Rosa María Ruiz-Vázquez, Francisco E Nicolás
Mucorales are an emerging group of human pathogens that are responsible for the lethal disease mucormycosis. Unfortunately, functional studies on the genetic factors behind the virulence of these organisms are hampered by their limited genetic tractability, since they are reluctant to classical genetic tools like transposable elements or gene mapping. Here, we describe an RNAi-based functional genomic platform that allows the identification of new virulence factors through a forward genetic approach firstly described in Mucorales...
January 20, 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/28107386/regulation-of-pi-2b-pilus-expression-in-hypervirulent-streptococcus-agalactiae-st-17-bm110
#2
Bruno Périchon, Noémi Szili, Laurence du Merle, Isabelle Rosinski-Chupin, Myriam Gominet, Samuel Bellais, Claire Poyart, Patrick Trieu-Cuot, Shaynoor Dramsi
The widely spread Streptococcus agalactiae (also known as Group B Streptococcus, GBS) "hypervirulent" ST17 clone is strongly associated with neonatal meningitis. The PI-2b locus is mainly found in ST17 strains but is also present in a few non ST17 human isolates such as the ST-7 prototype strain A909. Here, we analysed the expression of the PI-2b pilus in the ST17 strain BM110 as compared to the non ST17 A909. Comparative genome analyses revealed the presence of a 43-base pair (bp) hairpin-like structure in the upstream region of PI-2b operon in all 26 ST17 genomes, which was absent in the 8 non-ST17 strains carrying the PI-2b locus...
2017: PloS One
https://www.readbyqxmd.com/read/28107088/the-national-eye-survey-of-trinidad-and-tobago-nestt-rationale-objectives-and-methodology
#3
Tasanee Braithwaite, Neville Q Verlander, Debra Bartholomew, Petra Bridgemohan, Kevin McNally, Allana Roach, Subash Sharma, Deo Singh, Konrad Pesudovs, Surujpal Teelucksingh, Christine Carrington, Samuel Ramsewak, Rupert Bourne
PURPOSE: This paper describes the rationale, study design and procedures of the National Eye Survey of Trinidad and Tobago (NESTT). The main objective of this survey is to obtain prevalence estimates of vision impairment and blindness for planning and policy development. METHODS: A population-based, cross-sectional survey was undertaken using random multistage cluster sampling, with probability-proportionate-to-size methods. Eligible participants aged 5 years and older were sampled from the non-institutional population in each of 120 cluster segments...
January 20, 2017: Ophthalmic Epidemiology
https://www.readbyqxmd.com/read/28106837/a-distributed-and-energy-efficient-algorithm-for-event-k-coverage-in-underwater-sensor-networks
#4
Peng Jiang, Yiming Xu, Jun Liu
For event dynamic K-coverage algorithms, each management node selects its assistant node by using a greedy algorithm without considering the residual energy and situations in which a node is selected by several events. This approach affects network energy consumption and balance. Therefore, this study proposes a distributed and energy-efficient event K-coverage algorithm (DEEKA). After the network achieves 1-coverage, the nodes that detect the same event compete for the event management node with the number of candidate nodes and the average residual energy, as well as the distance to the event...
January 19, 2017: Sensors
https://www.readbyqxmd.com/read/28106826/colorectal-carcinoma-a-general-overview-and-future-perspectives-in-colorectal-cancer
#5
REVIEW
Inés Mármol, Cristina Sánchez-de-Diego, Alberto Pradilla Dieste, Elena Cerrada, María Jesús Rodriguez Yoldi
Colorectal cancer (CRC) is the third most common cancer and the fourth most common cause of cancer-related death. Most cases of CRC are detected in Western countries, with its incidence increasing year by year. The probability of suffering from colorectal cancer is about 4%-5% and the risk for developing CRC is associated with personal features or habits such as age, chronic disease history and lifestyle. In this context, the gut microbiota has a relevant role, and dysbiosis situations can induce colonic carcinogenesis through a chronic inflammation mechanism...
January 19, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28105942/the-occurrence-of-spring-forms-in-tetraploid-timopheevi-wheat-is-associated-with-variation-in-the-first-intron-of-the-vrn-a1-gene
#6
Andrey Borisovich Shcherban, Aleksandra Aleksandrovna Schichkina, Elena Artemovna Salina
BACKGROUND: Triticum araraticum and Triticum timopheevii are tetraploid species of the Timopheevi group. The former includes both winter and spring forms with a predominance of winter forms, whereas T. timopheevii is considered a spring species. In order to clarify the origin of the spring growth habit in T. timopheevii, allelic variability of the VRN-1 gene was investigated in a set of accessions of both tetraploid species, together with the diploid species Ae. speltoides, presumed donor of the G genome to these tetraploids...
November 16, 2016: BMC Plant Biology
https://www.readbyqxmd.com/read/28105941/the-loss-of-photosynthetic-pathways-in-the-plastid-and-nuclear-genomes-of-the-non-photosynthetic-mycoheterotrophic-eudicot-monotropa-hypopitys
#7
Nikolai V Ravin, Eugeny V Gruzdev, Alexey V Beletsky, Alexander M Mazur, Egor B Prokhortchouk, Mikhail A Filyushin, Elena Z Kochieva, Vitaly V Kadnikov, Andrey V Mardanov, Konstantin G Skryabin
BACKGROUND: Chloroplasts of most plants are responsible for photosynthesis and contain a conserved set of about 110 genes that encode components of housekeeping gene expression machinery and photosynthesis-related functions. Heterotrophic plants obtaining nutrients from other organisms and their plastid genomes represent model systems in which to study the effects of relaxed selective pressure on photosynthetic function. The most evident is a reduction in the size and gene content of the plastome, which correlates with the loss of genes encoding photosynthetic machinery which become unnecessary...
November 16, 2016: BMC Plant Biology
https://www.readbyqxmd.com/read/28105899/clinic-visit-frequency-in-wound-care-matters-data-from-the-us-wound-registry
#8
M J Carter, C E Fife
OBJECTIVE: A previous study suggested that the frequency with which patients visit wound care clinics influences the rate of chronic wound healing but high bias was present with regard to wound care centre selection. The objective of this retrospective cohort study was to confirm this finding by using a very large sample size of diabetic foot ulcers (DFUs) from the US Wound Registry. METHOD: Patients who visited the clinic more than once for a new DFU were eligible for study inclusion...
January 2, 2017: Journal of Wound Care
https://www.readbyqxmd.com/read/28105567/effects-of-oleuropein-on-pentylenetetrazol-induced-seizures-in-mice-involvement-of-opioidergic-and-nitrergic-systems
#9
Nastaran Rahimi, Bahram Delfan, Nazgol Motamed-Gorji, Ahmad R Dehpour
Oleuropein, a well-known olive polyphenol, has been shown to mediate neuroprotection in Alzheimer's disease and cerebral ischemia. We investigated the effects of oleuropein on pentylenetetrazole (PTZ)-induced seizures in male NMRI mice, with diazepam as the standard drug. We also examined the possible involvement of opioidergic/nitrergic pathways in the probable effects of oleuropein. Intraperitoneal (i.p.) administration of different doses of oleuropein (10, 20 and 30 mg/kg) significantly increased the seizure threshold 60 min prior to induction of seizure, in a dose-dependent manner...
January 19, 2017: Journal of Natural Medicines
https://www.readbyqxmd.com/read/28105279/nanoconjugated-nap-as-a-potent-and-periphery-selective-mu-opioid-receptor-modulator-to-treat-opioid-induced-constipation
#10
Guoyan G Xu, Olga Yu Zolotarskaya, Dwight A Williams, Yunyun Yuan, Dana E Selley, William L Dewey, Hamid I Akbarali, Hu Yang, Yan Zhang
Opioids are the mainstay for cancer and noncancer pain management. However, their use is often associated with multiple adverse effects. Among them, the most common and persistent one is probably opioid-induced constipation (OIC). Periphery selective opioid antagonists may alleviate the symptoms of OIC without compromising the analgesic effects of opioids. Recently our laboratories have identified one novel lead compound, 17-cyclopropylmethyl-3,14β-dihydroxy-4,5α-epoxy-6β-[(4'-pyridyl)acetamido]morphinan (NAP), as a peripherally selective mu opioid receptor ligand carrying subnanomolar affinity to the mu opioid receptor and over 100-folds of selectivity over both the delta and kappa opioid receptors, with reasonable oral availability and half-life, and potential to treat OIC...
January 12, 2017: ACS Medicinal Chemistry Letters
https://www.readbyqxmd.com/read/28104669/sex-specific-outcomes-with-addition-of-defibrillation-to-resynchronisation-therapy-in-patients-with-heart-failure
#11
Sérgio Barra, Rui Providência, Rudolf Duehmke, Serge Boveda, Eloi Marijon, Christian Reitan, Rasmus Borgquist, Didier Klug, Pascal Defaye, Nicolas Sadoul, Jean-Claude Deharo, Iannish Sadien, Kiran Patel, Khang-Li Looi, David Begley, Anthony W Chow, Jean-Yves Le Heuzey, Sharad Agarwal
OBJECTIVE: Among primary prevention patients with heart failure receiving cardiac resynchronisation therapy (CRT), the impact of additional implantable cardioverter defibrillator (ICD) treatment on outcomes and its interaction with sex remains uncertain. We aim to assess whether the addition of the ICD functionality to CRT devices offers a more pronounced survival benefit in men compared with women, as previous research has suggested. METHODS: Observational multicentre cohort study of 5307 consecutive patients with ischaemic or non-ischaemic dilated cardiomyopathy and no history of sustained ventricular arrhythmias having CRT implantation with (cardiac resynchronisation therapy defibrillator (CRT-D), n=4037) or without (cardiac resynchronisation therapy pacemaker (CRT-P), n=1270) defibrillator functionality...
January 19, 2017: Heart: Official Journal of the British Cardiac Society
https://www.readbyqxmd.com/read/28104580/leveraging-electronic-health-care-record-information-to-measure-pressure-ulcer-risk-in-veterans-with-spinal-cord-injury-a-longitudinal-study-protocol
#12
Stephen L Luther, Susan S Thomason, Sunil Sabharwal, Dezon K Finch, James McCart, Peter Toyinbo, Lina Bouayad, Michael E Matheny, Glenn T Gobbel, Gail Powell-Cope
BACKGROUND: Pressure ulcers (PrUs) are a frequent, serious, and costly complication for veterans with spinal cord injury (SCI). The health care team should periodically identify PrU risk, although there is no tool in the literature that has been found to be reliable, valid, and sensitive enough to assess risk in this vulnerable population. OBJECTIVE: The immediate goal is to develop a risk assessment model that validly estimates the probability of developing a PrU...
January 19, 2017: JMIR Research Protocols
https://www.readbyqxmd.com/read/28104403/a-model-to-predict-risk-of-blood-transfusion-after-gynecologic-surgery
#13
Jamie Stanhiser, Kevin Chagin, J Eric Jelovsek
BACKGROUND: A model that predicts a patient's risk of receiving a blood transfusion may facilitate selective preoperative testing and more efficient perioperative blood management utilization. OBJECTIVES: To construct and validate a model that predicts a patient's risk of receiving a blood transfusion after gynecologic surgery. STUDY DESIGN: 18,319 women who underwent gynecologic surgery at 10 institutions in a single health system by 116 surgeons between January 2010 and June 2014 were analyzed...
January 16, 2017: American Journal of Obstetrics and Gynecology
https://www.readbyqxmd.com/read/28104387/impact-of-echinocandin-on-prognosis-of-proven-invasive-candidiasis-in-icu-a-post-hoc-causal-inference-model-using-the-amarcand2-study
#14
Sébastien Bailly, Olivier Leroy, Elie Azoulay, Philippe Montravers, Jean-Michel Constantin, Hervé Dupont, Didier Guillemot, Olivier Lortholary, Jean-Paul Mira, Pierre-François Perrigault, Jean-Pierre Gangneux, Jean-François Timsit
OBJECTIVE: guidelines recommend first-line systemic antifungal treatment (SAT) with echinocandins in invasive candidiasis (IC), especially in critically ill patients. This study aimed at assessing the impact of echinocandins compared to azoles as initial SAT on the 28-day prognosis in adult ICU patients. METHODS: From the prospective multicenter AmarCAND2 cohort (835 patients), we selected those with documented IC and treated with echinocandins (ECH) or azoles (AZO)...
January 16, 2017: Journal of Infection
https://www.readbyqxmd.com/read/28104076/comparison-of-propensity-score-methods-and-covariate-adjustment-evaluation-in-4-cardiovascular-studies
#15
REVIEW
Markus C Elze, John Gregson, Usman Baber, Elizabeth Williamson, Samantha Sartori, Roxana Mehran, Melissa Nichols, Gregg W Stone, Stuart J Pocock
Propensity scores (PS) are an increasingly popular method to adjust for confounding in observational studies. Propensity score methods have theoretical advantages over conventional covariate adjustment, but their relative performance in real-word scenarios is poorly characterized. We used datasets from 4 large-scale cardiovascular observational studies (PROMETHEUS, ADAPT-DES [the Assessment of Dual AntiPlatelet Therapy with Drug-Eluting Stents], THIN [The Health Improvement Network], and CHARM [Candesartan in Heart Failure-Assessment of Reduction in Mortality and Morbidity]) to compare the performance of conventional covariate adjustment with 4 common PS methods: matching, stratification, inverse probability weighting, and use of PS as a covariate...
January 24, 2017: Journal of the American College of Cardiology
https://www.readbyqxmd.com/read/28103523/anthropogenic-chemical-cues-can-alter-the-swimming-behaviour-of-juvenile-stages-of-a-temperate-fish
#16
Carlos Díaz-Gil, Lucy Cotgrove, Sarah Louise Smee, David Simón-Otegui, Hilmar Hinz, Amalia Grau, Miquel Palmer, Ignacio A Catalán
Human pressure on coastal areas is affecting essential ecosystems including fish nursery habitats. Among these anthropogenic uses, the seasonal increment in the pressure due to leisure activities such as coastal tourism and yachting is an important environmental stressor in many coastal zones. These pressures may elicit understudied impacts due to, for example, sunscreens or other seasonal pollutants. The island of Majorca, northwest Mediterranean Sea, experiences one of the highest number of tourist visits per capita in the world, thus the surrounding coastal habitat is subject to high anthropogenic seasonal stress...
January 6, 2017: Marine Environmental Research
https://www.readbyqxmd.com/read/28103199/diagnostic-criteria-for-susac-syndrome
#17
Ilka Kleffner, Jan Dörr, Marius Ringelstein, Catharina C Gross, Yvonne Böckenfeld, Wolfram Schwindt, Benedikt Sundermann, Hubertus Lohmann, Heike Wersching, Julia Promesberger, Natascha von Königsmarck, Anne Alex, Rainer Guthoff, Catharina J M Frijns, L Jaap Kappelle, Sven Jarius, Brigitte Wildemann, Orhan Aktas, Friedemann Paul, Heinz Wiendl, Thomas Duning
BACKGROUND: Susac syndrome is characterised by the triad of encephalopathy with or without focal neurological signs, branch retinal artery occlusions and hearing loss. Establishment of the diagnosis is often delayed because the triad is complete only in a minority of patients at disease onset. This leads to a critical delay in the initiation of appropriate treatment. Our objective was to establish criteria for diagnosis of either definite or probable Susac syndrome. METHOD: The establishment of diagnostic criteria was based on the following three steps: (1) Definition of a reference group of 32 patients with an unambiguous diagnosis of Susac syndrome as assessed by all interdisciplinary experts of the European Susac Consortium (EuSaC) team (EuSaC cohort); (2) selection of diagnostic criteria, based on common clinical and paraclinical findings in the EuSaC cohort and on a review of the literature; and (3) validation of the proposed criteria in the previously published cohort of all Susac cases reported until 2012...
December 2016: Journal of Neurology, Neurosurgery, and Psychiatry
https://www.readbyqxmd.com/read/28102882/factors-associated-with-significant-mri-findings-in-medical-walk-in-patients-with-acute-headache
#18
Joris Budweg, Till Sprenger, Anthony De Vere-Tyndall, Anne Hagenkord, Christoph Stippich, Christoph T Berger
QUESTION: Acute headache is a main reason for emergency consultations and can be a symptom of dangerous neurological conditions. We hypothesised that in medical walk-in headache patients with low suspicion of intracranial bleeding significant findings in brain magnetic resonance imaging (MRI) are associated with clinical features. METHODS: Retrospective chart review on medical outpatient referrals for brain MRI (2010-2014) with the chief complaint "acute headache" (duration <4 weeks)...
January 19, 2017: Swiss Medical Weekly
https://www.readbyqxmd.com/read/28102025/the-direct-referral-to-endovascular-center-criteria-a-proposal-for-pre-hospital-evaluation-of-acute-stroke-in-the-madrid-stroke-network
#19
J Rodríguez-Pardo, B Fuentes, M Alonso de Leciñana, Á Ximénez-Carrillo, G Zapata-Wainberg, J Álvarez-Fraga, F J Barriga, L Castillo, J Carneado-Ruiz, J Díaz-Guzman, J Egido-Herrero, A de Felipe, J Fernández-Ferro, L Frade-Pardo, Á García-Gallardo, A García-Pastor, A Gil-Núñez, C Gómez-Escalonilla, M Guillán, Y Herrero-Infante, J Masjuan-Vallejo, M Á Ortega-Casarrubios, J Vivancos-Mora, E Díez-Tejedor
BACKGROUND AND PURPOSE: For patients with acute ischaemic stroke due to large-vessel occlusion, it has recently been shown that mechanical thrombectomy (MT) with stent retrievers is better than medical treatment alone. However, few hospitals can provide MT 24 h/day 365 days/year, and it remains unclear whether selected patients with acute stroke should be directly transferred to the nearest MT-providing hospital to prevent treatment delays. Clinical scales such as Rapid Arterial Occlusion Evaluation (RACE) have been developed to predict large-vessel occlusion at a pre-hospital level, but their predictive value for MT is low...
January 19, 2017: European Journal of Neurology: the Official Journal of the European Federation of Neurological Societies
https://www.readbyqxmd.com/read/28102004/prevalence-and-causes-of-hearing-impairment-in-fundong-health-district-north-west-cameroon
#20
Silvia Ferrite, Islay Mactaggart, Hannah Kuper, Joseph Oye, Sarah Polack
OBJECTIVE: To estimate the prevalence and causes of hearing impairment in Fundong Health District, North West Cameroon. METHODS: We selected 51 clusters of 80 people through probability proportionate to size sampling. Initial hearing screening was undertaken through an otoacoustic emission (OAE) test. Participants aged 4+ years who failed this test in both ears or for whom an OAE reading could not be taken underwent a manual pure-tone audiometry (PTA) screening...
January 18, 2017: Tropical Medicine & International Health: TM & IH
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