Minisatellite mutation rates increase with extra-pair paternity among birds

<p>Abstract</p> <p>Background</p> <p>Amos <abbrgrp><abbr bid="B1">1</abbr></abbrgrp> suggested recently that a previously reported positive relationship between minisatellite mutation rates and extra-pair paternity among species of birds <abbrgrp><abbr bid="B2">2</abbr></abbrgrp> was confounded by transcription errors and selective inclusion of studies. Here we attempted to replicate the results reported by Amos <abbrgrp><abbr bid="B1">1</abbr></abbrgrp>, but also tested for the relationship by expanding the data base by including studies published after our original paper.</p> <p>Results</p> <p>We were able to replicate the positive association between mutation rate and extra-pair paternity in birds, even after controlling statistically for the confounding effecs of mean number of bands scored, using 133 species, compared to 81 species in our first report <abbrgrp><abbr bid="B2">2</abbr></abbrgrp>. We suggest that Amos <abbrgrp><abbr bid="B1">1</abbr></abbrgrp> failed to reach a similar conclusion due to four different potential causes of bias. First, Amos <abbrgrp><abbr bid="B1">1</abbr></abbrgrp> missed 15 studies from the literature that we were able to include. Second, he used estimates of mutation rates that were based on both within- and extra-pair offspring, although the latter will cause bias in estimates. Third, he made a number of transcription errors from the original publications for extra-pair paternity, mutation rates, number of novel bands, and mean number of bands scored per individual. Fourth, he included <it>Vireo olivaceus </it>although the mutation rate estimate was based on one single offspring!</p> <p>Conclusion</p> <p>There was a positive association between mutation rates and extra-pair paternity in birds, accounting for an intermediate effect size that explained 5–11% of the variance; estimates that are bound to be conservative due to many different causes of noise in the data. This result was robust to statistical control for potentially confounding variables, highlighting that it is important to base comparative studies on all available evidence, and that it is crucial to critically transcribe data while simultaneously checking published estimates for their correctness.</p

The ATHAC Survey 04-05: observational study regarding the use of neuter dressings or dressings impregnated in an antibacterian agent using an innovative patented technology: the lipid colloid technology for the treatment of acute and/or chronic wounds

Introducción: El estudio ATHAC recoge datos sobre heridas agudas y crónicas que son candidatas a un tratamiento a base de apósitos grasos neutros como la gama URGOTUL. Objetivos: Describir las características de las heridas, describir los tratamiento aplicados a estas heridas y explorar las opiniones de los profesionales de enfermería y los pacientes sobre los tratamientos en términos de aplicabilidad, adaptabilidad y confort para el paciente. Material y métodos: 1.500 pacientes fueron incluidos en el estudio de acuerdo al tipo de herida y a los tratamientos en uso. Se recogieron datos a partir de dos cuestionarios: uno para el paciente y otro para la enfermera responsable de sus cuidados. Las enfermeras recogieron los datos en el primer día de inclusión y los pacientes respondían al cuestionario 1 mes más tarde o antes si la herida había cicatrizado. Las variables recogidas por la enfermera fueron: datos sociodemográficos, etiología de las lesiones, características y localización de las heridas, aspectos y opiniones sobre el tratamiento. A los pacientes se les preguntó por la duración del tratamiento, el estado de la lesión en el momento de contestar y desde su punto de vista, así como su opinión sobre el dolor, satisfacción general y aceptabilidad. Se llevaron a cabo análisis descriptivos uni y bivariados. Para cada paciente, si tenía más de una lesión, se recogieron datos de la lesión de mayor tamaño. Resultados: Finalmente, se estudiaron 1.432 pacientes con una o más lesiones (420 tenían más de una lesión). El 60,4% eran mujeres y la edad media fue de 66 ± 19 años. En el caso de las heridas crónicas (657 lesiones) predominaron las úlceras venosas (47%) y las úlceras por presión (23%). En las heridas agudas (775 lesiones), la mayoría fueron traumáticas (41%) y quemaduras (32,5%). La principal localización en todas las lesiones fueron los miembros inferiores (57,4% en heridas crónicas y 39% en agudas). El 84,4% de los casos indicó presentar algún tipo de dolor previo al comienzo de este estudio. Al finalizar el estudio, un porcentaje menor del 20% indicó presentar algún tipo de dolor. El 72% de las heridas agudas y el 35% de las crónicas, como refieren los pacientes, había cicatrizado al finalizar el estudio (en un tiempo medio de entre 20-40 días). El 54% de las heridas crónicas evoluciona favorablemente y el 26% de las agudas. Más del 80% de las heridas estudiadas fueron tratadas con la gama URGOTUL. Conclusión: URGOTUL es una buena opción para el tratamiento de este tipo de heridas, especialmente para las heridas agudas, en relación a su carácter atraumático y a su capacidad de cicatrización, así como la buena aceptación y satisfacción de los pacientes.Introduction: The ATHAC survey collected data on acute or chronic wounds that were candidates for a treatment with grassy dressings like URGOTUL. Aims: To describe the wound’s characteristics, to describe treatments applied to these wounds and to Explore Nurses’ and patients’ opinion about the treatments in terms of applicability, adaptability and patient comfort. Methods: 1,500 patients were included in the study according to wound types and treatments. Data were collected with nurses and patient questionnaires. Nurses collected data the first day of inclusion and patients respond one month after or when wounds healed. Variables collected by nurses were: demographic, aetiology, characteristics and location of the wound, aspects and opinions of the treatment. Patients were asked about duration of treatments, wound state from their point of view and opinions about pain, satisfaction and acceptability. Univariate and bivariate descriptive analysis were conducted. For each patient was selected the biggest wound for data collection. Results: Finally, 1432 patients with one or more lesions were studied (420 had more than one). 60,4% were women and the mean age was 66. Chronic wounds, mainly, were venous leg ulcer (47%) and pressure ulcers (23%). In acute wounds, were traumatic (41%) and burns (32,5%). The main location was inferior extremities (57,4% in chronic and 39% in acute). 49% of cases reported moderate to high spontaneous pain previous to this study. At the end, only 20-30% reported pain (during the study, in more than 80% the dressing used was Urgotul). 72% of acute wounds and 35% of chronic wounds, as referred by patients, were healed when finished the study (between 20-40 days of treatment). Conclusion: Urgotul is a good option for atraumatic treatment of this type of lesions, mainly for acute wounds, since more of them had healed in an acceptable time with a good patient satisfaction

2nd National Study of Pressure Ulcer Prevalence in Spain, 2005: epidemiology and definitory wound and patient variables

Desde el año 1999 el GNEAUPP consideró de vital interés para rescatar y mantener el valor real del problema de las úlceras por presión (UPP), la constitución de un observatorio permanente de la evolución epidemiológica de estos procesos, cuyo siguiente paso ha sido el desarrollo de este 2º Estudio Nacional de Prevalencia que presentamos. Se definieron como objetivos de la investigación obtener indicadores epidemiológicos que permitiesen dimensionar el problema de las UPP en España, así como algunos aspectos relacionados con las tendencias de prevención de las mismas en instituciones de Atención Primaria, atención hospitalaria y asistencia sociosanitaria. Elaboramos un cuestionario postal para estimar la prevalencia puntual y media de UPP a partir de una muestra no aleatoria. En estos cuestionarios se solicitaba a los profesionales de Atención Primaria que informasen acerca de su lista de usuarios mayores de 14 años (Unidades básicas asistenciales de Medicina General) y a los profesionales de unidades de hospitalización o de centros sociosanitarios que informasen acerca de los pacientes de sus respectivas unidades. Se definió la prevalencia como “prevalencia puntual” (información en un solo momento del tiempo). Se calculó la prevalencia cruda (PC) y media (PM). Los cuestionarios contenían preguntas para obtener datos sobre los pacientes con UPP (numerador del indicador), sobre el total de pacientes de esa unidad a estudio (denominador del indicador), sobre las lesiones mismas, así como información de las tendencias de prevención de UPP en las instituciones de los receptores de los cuestionarios. Se reportaron 1.791 pacientes con UPP (39% en hospital, 27% en Atención Primaria y 34% en centros sociosanitarios). En Atención Primaria la PC fue de 3,73% y la PM de 9,11% ± 10,9% para los pacientes mayores de 14 años incluidos en el programa de atención domiciliaria; en las unidades de hospital, la PC fue de 8,24% y la PM de 8,91% ± 12,20%, y en los centros sociosanitarios la PC fue de 6,10% y la PM de 10,9% ± 11,9%. En todos los niveles asistenciales, el grupo de población mayoritariamente afecto era el de los mayores de 65 años (84,7%). Los cuestionarios recibidos proporcionaron información sobre 2.837 lesiones: 23,2% de estadio I, 37,5% de estadio II, 27,0% de estadio III, 11,8% de estadio IV y un 0,5% sin estadiar. La localización más frecuente fue el sacro seguido de los talones, en todos los niveles asistenciales. Puede concluirse que las UPP siguen constituyendo, todavía, un importante problema de salud pública que afecta de manera primordial a personas mayores.Since 1999, GNEAUPP considered it vital to create a permanent observatory of the epidemiological evolution of these processes, in order to rescue and maintain the real value of the problem of Pressure Ulcers, which has given way to the next step, the 2nd National Prevalence Study we now present. The objectives set forth in this study were to obtain epidemiological indicators that would allow us to find the extent of the pressure ulcer problem in Spain, as well as some aspects related to the prevention of such in primary care centers, hospitals and socio-sanitary institutions. We sent out a questionnaire in order to estimate the punctual and average prevalence of PU (initials UPP in Spanish) using non-random sampling. Primary Care professionals were asked to give information about their patients who were over 14 years of age (General Practitioner Surgeries) and professionals from Hospital Units and socio-sanitary centers were asked about their patients respectively. Prevalence was defined as ‘punctual prevalence’ (information in a specific moment in time). The crude prevalence (initials PC in Spanish) and average prevalence (PM) were calculated. The questionnaires only included questions on patients with PU (numerator of the indicator) over the total of patients of the unit being studied (denominator of the indicator) about the wounds caused as well as information on PU prevention in the institutions where each respondant worked. 1,791 patients were reported to have pressure ulcers (39% in hospital, 27% in primary care centers and 34% in socio-sanitary centers). In Primary Care, the PC was 3.73% and the PM was 9.11% ± 10.9% for patients over 14 years who were included in the home care program. In the hospital units, the PC was 8.24% and the PM was 8.91% ± 12.20% and in the socio-sanitary centers, the PC was 6.10% and the PM was 10.9% ± 11.9%. The group most affected of each health care level was the one over 65 years of age (84.7%). The completed questionnaires provided information about 2,837 wounds: 23.2% were stage I, 37.5% stage II, 27.0% stage III, 11.8% stage IV and 0.5% did not state the stage. PU most frequently affected the sacral region, followed by the heels, in all health care levels. It can be concluded that PU are still an important public health problem that affect mainly elderly people

Serum Collagen Type II Cleavage Epitope and Serum Hyaluronic Acid as Biomarkers for Treatment Monitoring of Dogs with Hip Osteoarthritis

The aim of this study was to evaluate the use of serum type II collagen cleavage epitope and serum hyaluronic acid as biomarkers for treatment monitoring in osteoarthritic dogs. For this purpose, a treatment model based on mesenchymal stem cells derived from adipose tissue combined with plasma rich in growth factors was used. This clinical study included 10 dogs with hip osteoarthritis. Both analytes were measured in serum at baseline, just before applying the treatment, and 1, 3, and 6 months after treatment. These results were compared with those obtained from force plate analysis using the same animals during the same study period. Levels of type II collagen cleavage epitope decreased and those of hyaluronic acid increased with clinical improvement objectively verified via force plate analysis, suggesting these two biomarkers could be effective as indicators of clinical development of joint disease in dogs. Introductio

Neighborhood-corrected interface discontinuity factors for multi-group pin-by-pin diffusion calculations for LWR

Performing three-dimensional pin-by-pin full core calculations based on an improved solution of the multi-group diffusion equation is an affordable option nowadays to compute accurate local safety parameters for light water reactors. Since a transport approximation is solved, appropriate correction factors, such as interface discontinuity factors, are required to nearly reproduce the fully heterogeneous transport solution. Calculating exact pin-by-pin discontinuity factors requires the knowledge of the heterogeneous neutron flux distribution, which depends on the boundary conditions of the pin-cell as well as the local variables along the nuclear reactor operation. As a consequence, it is impractical to compute them for each possible configuration; however, inaccurate correction factors are one major source of error in core analysis when using multi-group diffusion theory. An alternative to generate accurate pin-by-pin interface discontinuity factors is to build a functional-fitting that allows incorporating the environment dependence in the computed values. This paper suggests a methodology to consider the neighborhood effect based on the Analytic Coarse-Mesh Finite Difference method for the multi-group diffusion equation. It has been applied to both definitions of interface discontinuity factors, the one based on the Generalized Equivalence Theory and the one based on Black-Box Homogenization, and for different few energy groups structures. Conclusions are drawn over the optimal functional-fitting and demonstrative results are obtained with the multi-group pin-by-pin diffusion code COBAYA3 for representative PWR configurations

Structures of T7 bacteriophage portal and tail suggest a viral DNA retention and ejection mechanism

Double-stranded DNA bacteriophages package their genome at high pressure inside a procapsid through the portal, an oligomeric ring protein located at a unique capsid vertex. Once the DNA has been packaged, the tail components assemble on the portal to render the mature infective virion. The tail tightly seals the ejection conduit until infection, when its interaction with the host membrane triggers the opening of the channel and the viral genome is delivered to the host cell. Using high-resolution cryo-electron microscopy and X-ray crystallography, here we describe various structures of the T7 bacteriophage portal and fiber-less tail complex, which suggest a possible mechanism for DNA retention and ejection: a portal closed conformation temporarily retains the genome before the tail is assembled, whereas an open portal is found in the tail. Moreover, a fold including a seven-bladed β-propeller domain is described for the nozzle tail protein.This work was supported by the Ministry of Science, Innovation and Universities of Spain, grants BFU 2014-54181 (to J.L.C.), BFU 2014-53550-P and BFU2017-83720-P (to M.C.), and contracts SEV-2013-0347 (to A.C.) and RYC-2011-09071 (to C.M.). We acknowledge institutional funding through the Spanish Government Centres and Units of Excellence Severo Ochoa and Maria de Maeztu awards to IRB Barcelona (SEV-2015-0500) and IBMB Structural Biology Unit (MDM-2014-0435), respectively, and from the CERCA Programme of the Catalan Government to the IRB Barcelona. This work has also been supported by the European Commission, Horizon 2020 program through iNEXT project (grant number 653706)

Obtaining protoanemonin through selective oxidation of Dfructose and 5-(hydroxymethyl) furfural in a self-catalysed reaction

Although different ways of converting 5- (hydroxymethyl)furfural (1) to various substrates with high value have been sought, few transformations have obtained building blocks that can be very useful in the area of fine chemistry. Herein, we report the synthesis of protoanemonin (5-methylenefuran-2(5H)- one) from D-fructose via compound (1), a versatile γalkylidenebutenolide, using an efficient self-catalysed process with formic acid, with high reaction performance and selectivity (up to 94% yield and 98% conversion from (1), while 28% yield from Dfructose). This efficient and simple operational process involved a two-phase aqueous-organic system between chlorinated solvents (CHxCly) and hydrogen peroxide as the initial oxidizing agent. The reaction presents a key cleavage in the 5-hydroxymethyl moiety of (1), due to the Baeyer-Villiger oxidation (BVO) process that generates formic acid in situ. Ultimately, DFF and HMF were successfully obtained in 80% and 98% yield, respectively, starting from D-fructose and using Preyssler heteropolyacids as Brønsted acid catalysts under an atmosphere of oxygen in the absence of hydrogen peroxide.Fil: Martínez, José J.. Universidad Pedagógica y Tecnológica de Colombia; ColombiaFil: Páez, Luis A.. Universidad Pedagógica y Tecnológica de Colombia; ColombiaFil: Gutiérrez, Luisa F.. Universidad Pedagógica y Tecnológica de Colombia; ColombiaFil: Pardo Cuervo, Oscar H.. Universidad Pedagógica y Tecnológica de Colombia; ColombiaFil: Rojas, Hugo A.. Universidad Pedagógica y Tecnológica de Colombia; ColombiaFil: Romanelli, Gustavo Pablo. Facultad de Ciencias Agrarias y Forestales, Universidad Nacional de la Plata; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigación y Desarrollo en Ciencias Aplicadas "Dr. Jorge J. Ronco". Universidad Nacional de la Plata. Facultad de Ciencias Exactas. Centro de Investigación y Desarrollo en Ciencias Aplicadas; ArgentinaFil: Portilla, Jaime. Universidad de Los Andes, Colombia; ColombiaFil: Castillo, Juan Carlos. Universidad Pedagógica y Tecnológica de Colombia; Colombia. Universidad de los Andes; ColombiaFil: Gamboa Becerra, Diana Paola. Universidad Pedagógica y Tecnológica de Colombia; Colombi

Early Stepdown From Echinocandin to Fluconazole Treatment in Candidemia: A Post Hoc Analysis of Three Cohort Studies

[Background] There are no clear criteria for antifungal de-escalation after initial empirical treatments. We hypothesized that early de-escalation (ED) (within 5 days) to fluconazole is safe in fluconazole-susceptible candidemia with controlled source of infection.[Methods] This is a multicenter post hoc study that included consecutive patients from 3 prospective candidemia cohorts (2007–2016). The impact of ED and factors associated with mortality were assessed.[Results] Of 1023 candidemia episodes, 235 met inclusion criteria. Of these, 54 (23%) were classified as the ED group and 181 (77%) were classified as the non-ED group. ED was more common in catheter-related candidemia (51.9% vs 31.5%; P = .006) and episodes caused by Candida parapsilosis, yet it was less frequent in patients in the intensive care unit (24.1% vs 39.2%; P = .043), infections caused by Nakaseomyces glabrata (0% vs 9.9%; P = .016), and candidemia from an unknown source (24.1% vs 47%; P = .003). In the ED and non-ED groups, 30-day mortality was 11.1% and 29.8% (P = .006), respectively. Chronic obstructive pulmonary disease (odds ratio [OR], 3.97; 95% confidence interval [CI], 1.48–10.61), Pitt score > 2 (OR, 4.39; 95% CI, 1.94–9.20), unknown source of candidemia (OR, 2.59; 95% CI, 1.14–5.86), candidemia caused by Candida albicans (OR, 3.92; 95% CI, 1.48–10.61), and prior surgery (OR, 0.29; 95% CI, 0.08–0.97) were independent predictors of mortality. Similar results were found when a propensity score for receiving ED was incorporated into the model. ED had no significant impact on mortality (OR, 0.50; 95% CI, 0.16–1.53).[Conclusions] Early de-escalation is a safe strategy in patients with candidemia caused by fluconazole-susceptible strains with controlled source of bloodstream infection and hemodynamic stability. These results are important to apply antifungal stewardship strategies.This research forms part of an activity that has received funding from EIT Health. EIT Health is supported by the European Institute of Innovation and Technology (EIT), a body of the European Union that receives support from the European Union´s Horizon 2020 Research and Innovation Program. This study has been cofunded by the European Regional Development Fund. E. M.-G. (PI18/01061), P. P.-A. (“Rio Hortega” contract CM18/00132), M. F.-R. (“Miguel Servet” contract CP18/00073), and C. G.-V. (FIS PI18/01061) have received research grants from the Ministerio de Sanidad y Consumo, Instituto de Salud Carlos III.Peer reviewe

Seabird ticks (<i>Ixodes uriae</i>) distribution along the Antarctic Peninsula

The distribution of the tick Ixodes uriae is studied in the South Shetlands and different locations along the Antarctic Peninsula. Ticks were found beneath stones close to penguin rookeries of chinstrap, gentoo and adelie penguin, although no individuals were found parasitized. Our results showed that ticks are not distributed evenly along the Antarctic Peninsula being more common and abundant in the northern part with relative abundances of ticks ranging from 1 to 57 individuals per stone and from 2 to 26% of the stone inspected. Ticks are probably absent in the south.Centro de Estudios Parasitológicos y de Vectore