Un método para cuantificar las contribuciones de los colaboradores en las publicaciones científicas

A method for quantifying collaborators’ contributions in scientific publications Authorship has become a hot topic in the past decades, especially in the field of biomedical sciences. Concern about this issue is increasing in other sciences as well, due to the importance of authorship for scientific careers and funding. I propose a method to quantify collaborators’ relative contributions to scientific publications, from which contributorship (collaborators who sign the publication and their order of appearance) can be established. This method begins with an initial agreement among collaborators based on principles of distribution of credit and weighting contributions to the design, data gathering, analysis, interpretation, writing and administration phases involved in scientific publication. Standardized application of this method with tables showing the percentage of each collaborators’ involvement would contribute to the assessment of scientists’ productivity and the construction of citation indexes Editorials, indexing services, university departments and laboratories should coordinate policies for the attainment of standardized, unified criteri

Managing menopause in women living with HIV: A survey of primary care practitioners.

Objective One in three women living with HIV (WLHIV) in the UK is aged 45-56, and therefore of potentially menopausal age. Little is known about the management of menopause in WLHIV in primary care. We aim to describe current knowledge and practice in the management of menopause in WLWH among primary care practitioners (PCPs). Methods A questionnaire-based study of 88 PCPs attending two sexual and reproductive health conferences. Results Almost all respondents (n = 87, 99%) routinely managed women with menopause-related symptoms; however, only 18 (20%) reported having managed menopause in WLHIV. Over 95% (n = 85) reported being confident in managing menopause in general, whereas less than half (n = 40) reported confidence in managing menopause in WLHIV ( p < 0.001). The majority of respondents (n = 84) felt that menopause should be routinely managed in primary care, whereas just over half thought that menopause in WLHIV should be managed in primary care (n = 50, p < 0.001). Almost all respondents (n = 85) reported concerns about managing menopause in WLHIV. Conclusion PCPs reported limited experience of and low levels of confidence in managing menopause-related symptoms in WLHIV. Nearly all PCPs had concerns about managing menopause-related symptoms in WLHIV, many stating that this should be managed outside primary care. Development of national guidance and specialised training, coupled with good liaison between HIV services and PCPs, may improve confidence in this area

Fichas de las especies

Sittasomus griseicapillus, Xiphorhynchus flavigaster, Myiopagis viridicata, Mitrephanes phaeocercus, Empidonax difficilis / occidentalis, Myiarchus tuberculifer, Myiarchus cinerascens, Myiarchus nuttingi, Myiarchus tyrannulus, Pitangus sulphuratus, Myiozetetes similis, Myiodynastes luteiventris, Pachyramphus aglaiae, Vireo brevipennis, Vireo bellii, Vireo nelsoni, Vireo hypochryseus, Vireo gilvus, Vireo flavoviridis, Thryothorus sinaloa, Thryothorus felix, Troglodytes brunneicollis, Troglodytes aedon, Henicorhina leucophrys, Polioptila caerulea, Myadestes occidentalis, Catharus aurantiirostris, Catharus occidentalis, Catharus frantzii, Catharus ustulatus, Turdus assimilis, Turdus rufopalliatus, Melanotis caerulescens, Vermivora celata, Vermivora ruficapilla, Vermivora crissalis, Parula superciliosa, Parula pitiayumi, Dendroica petechia, Dendroica coronata, Dendroica nigrescens, Dendroica townsendi, Dendroica graciae, Mniotilta varia, Seiurus aurocapilla, Seiurus noveboracensis, Seiurus motacilla, Oporornis tolmiei, Geothlypis trichas, Geothlypis poliocephala, Wilsonia pusilla, Cardellina rubrifrons, Myioborus miniatus, Basileuterus belli, Icteria virens, Granatellus venustus Piranga erythrocephala, Volatinia jacarina, Diglossa baritula, Atlapetes pileatus, Arremon virenticeps Arremonops rufivirgatus, Melozone kieneri, Pipilo ocai, Aimophila ruficauda, Melospiza lincolnii Saltator coerulescens, Pheucticus melanocephalus, Cyanocompsa parellina, Passerina leclancherii, Passerina versicolor, Passerina ciris, Icterus cucullatus, Icterus pustulatus, Icterus graduacauda Carduelis notat

Resultados generales

Aspecto externo Morfometría esquelética y masa Morfometría alar y caudal Tamaño Estructuras sexuales externas Determinación del sexo Neumatización craneal Muda Datación mediante variables semicuantitativas Ciclos vitale

Serum selenium concentrations and diabetes in U.S. adults : National Health and Nutrition Examination Survey (NHANES) 2003–2004

Background: Increasing evidence suggests that high selenium levels are associated with diabetes and other cardiometabolic risk factors. Objectives: We evaluated the association of serum selenium concentrations with fasting plasma glucose, glycosylated hemoglobin levels, and diabetes in the most recently available representative sample of the U.S. population. Methods: We used a cross-sectional analysis of 917 adults ≥ 40 years of age who had a fasting morning blood sample in the National Health and Nutrition Examination Survey 2003–2004. We evaluated the association of serum selenium, measured by inductively coupled plasma-dynamic reaction cell-mass spectrometry, and diabetes, defined as a self-report of current use of hypoglycemic agents or insulin or as fasting plasma glucose ≥ 126 mg/dL. Results: Mean serum selenium was 137.1 μg/L. The multivariable adjusted odds ratio [95% confidence interval (CI)] for diabetes comparing the highest quartile of serum selenium (≥ 147 μg/L) with the lowest (< 124 μg/L) was 7.64 (3.34–17.46). The corresponding average differences (95% CI) in fasting plasma glucose and glycosylated hemoglobin were 9.5 mg/dL (3.4–15.6 mg/dL) and 0.30% (0.14–0.46%), respectively. In spline regression models, the prevalence of diabetes as well as glucose and glycosylated hemoglobin levels increased with increasing selenium concentrations up to 160 μg/L. Conclusions: In U.S. adults, high serum selenium concentrations were associated with higher prevalence of diabetes and higher fasting plasma glucose and glycosylated hemoglobin levels. Given high selenium intake in the U.S. population, further research is needed to determine the role of excess selenium levels in the development or the progression of diabetes

Structural Elucidation and Engineering of a Bacterial Carbohydrate Oxidase

Flavin-dependent carbohydrate oxidases are valuable tools in biotechnological applications due to their high selectivity in the oxidation of carbohydrates. In this study, we report the biochemical and structural characterization of a recently discovered carbohydrate oxidase from the bacterium Ralstonia solanacearum, which is a member of the vanillyl alcohol oxidase flavoprotein family. Due to its exceptionally high activity toward N-acetyl-d-galactosamine and N-acetyl-d-glucosamine, the enzyme was named N-acetyl-glucosamine oxidase (NagOx). In contrast to most known (fungal) carbohydrate oxidases, NagOx could be overexpressed in a bacterial host, which facilitated detailed biochemical and enzyme engineering studies. Steady state kinetic analyses revealed that non-acetylated hexoses were also accepted as substrates albeit with lower efficiency. Upon determination of the crystal structure, structural insights into NagOx were obtained. A large cavity containing a bicovalently bound FAD, tethered via histidyl and cysteinyl linkages, was observed. Substrate docking highlighted how a single residue (Leu251) plays a key role in the accommodation of N-acetylated sugars in the active site. Upon replacement of Leu251 (L251R mutant), an enzyme variant was generated with a drastically modified substrate acceptance profile, tuned toward non-N-acetylated monosaccharides and disaccharides. Furthermore, the activity toward bulkier substrates such as the trisaccharide maltotriose was introduced by this mutation. Due to its advantage of being overexpressed in a bacterial host, NagOx can be considered a promising alternative engineerable biocatalyst for selective oxidation of monosaccharides and oligosaccharides.</p

Arsenic Exposure and Hypertension: A Systematic Review

Background: Environmental exposure to arsenic has been linked to hypertension in persons living in arsenic-endemic areas

Association of High-Sensitivity Troponin with Cardiac CT Angiography Evidence of Myocardial and Coronary Disease in a Primary Prevention Cohort of Men: Results from MACS.

BackgroundHigh-sensitivity cardiac troponin (hs-cTn) elevations are associated with incident cardiovascular disease events in primary prevention samples. However, the mechanisms underlying this association remain unclear.MethodsWe studied 458 men without known cardiovascular disease who participated in the cardiovascular disease substudy of the Multicenter AIDS Cohort Study and had cardiac CT angiography. We used multivariable linear and logistic regression models to examine the cross-sectional associations between coronary artery stenosis, coronary artery plaque, indexed left ventricular mass (LVMi), and the outcome of hs-cTnI. We also evaluated the associations between HIV serostatus or use of highly active antiretroviral therapy (HAART) and hs-cTnI.ResultsThe mean age was 54 years, 54% were white, and 61% were HIV infected. In multivariable-adjusted logistic models, comparing the highest quartile of LVMi with the lowest quartile, the odds ratio (OR) of hs-cTnI ≥75th percentile was 2.59 (95% CI, 1.20-5.75). There was no significant association between coronary stenosis severity or plaque type and hs-cTnI in linear models; however, in logistic regression models, coronary artery stenosis ≥70% (8% of sample) was marginally associated with a higher likelihood (OR, 2.75 [95% CI, 1.03, 7.27]) of having hs-cTnI ≥75th percentile. There were no associations between HIV serostatus or HAART use and hs-cTnI in either linear or logistic models.ConclusionAmong primary prevention men with or at risk for HIV, hs-cTnI concentrations were strongly associated with LVMi but were not associated with HIV infection or treatment status or with coronary plaque type or stenosis until the extremes of severity (≥70% stenosis)

Discordance between 10-year cardiovascular risk estimates using the ACC/AHA 2013 estimator and coronary artery calcium in individuals from 5 racial/ethnic groups: Comparing MASALA and MESA

Background and aims: South Asian (SA) individuals are thought to represent a group that is at high-risk for atherosclerotic cardiovascular disease (ASCVD). However, the performance of the Pooled Cohort Equations (PCE) remains uncertain in SAs living in the US. We aimed to study the interplay between predicted 10-year ASCVD risk and coronary artery calcium (CAC) in SAs compared to other racial/ethnic groups. Methods: We studied 536 SAs from the Mediators of Atherosclerosis in South Asians Living in America (MASALA) study, and 2073 Non-Hispanic Whites (NHWs), 1514 African Americans (AAs), 1254 Hispanics, and 671 Chinese Americans (CAs) from the Multi-Ethnic Study of Atherosclerosis (MESA) who were not currently on statins. We used logistic regression models to assess the association between race/ethnicity and CAC within each ASCVD risk stratum. Results: SAs at low and at intermediate estimated ASCVD risk were more likely to have CAC = 0 compared to NHWs, while SAs at high risk had a similar CAC burden to NHWs. For example, intermediate-risk SAs had a 73% higher odds of CAC = 0 compared to NHWs (95% 1.00-2.99), while high-risk SAs were equally likely to have CAC = 0 (OR 0.95, 95% CI 0.65-1.38) and CAC > 100 (OR 0.86, 95% CI 0.61-1.22). Conclusions: Our results suggest that the extent of ASCVD risk overestimation using the PCEs may be even greater among SAs considered at low and intermediate risk than among NHWs. Studies with incident ASCVD events are required to validate and/or recalibrate current ASCVD risk prediction tools in this group

Influence of profilin on sensitisation profiles determined by cutaneous tests and IgE to major allergens in polysensitised patients

Background: Profilin sensitisation is considered a diagnostic confounding factor in areas where patients are exposed to multiple pollens. The aim of this study is to assess pollen sensitisation profiles in adults and children and to evaluate, by means of component-resolved diagnosis (CRD) and skin prick testing (SPT), which pollens may be considered as risk factors of profilin sensitisation in order to establish the best diagnostic approach in polysensitised patients. Methods: A total of 231 pollen-allergic patients (adults and children) were included, out of the pollen season, from an area with similar levels of pollen exposure. Allergological diagnosis was performed by SPT and determination of specific IgE (sIgE) to major allergen components (ADVIA-Centaur™). Patients had not received immunotherapy in the last 5 years and had to reside in the area for 5 consecutive years before entering the study. Results: The relation between sensitisation measured by SPT and by sIgE was studied using a model of cases (patients with +sIgE to a specific allergen) and controls (patients with -sIgE to the same allergen). The outcome, in terms of odds-ratios (OR), was statistically significant for Olea (Ole e 1) (p = 0.0005), Salsola (Sal k 1) (p = 0.0118) and Platanus (Pla a 1+ 2) (p = 0.0372). While positivity of SPT to most pollens was statistically associated with a risk of profilin sensitisation, by CRD the association was statistically significant only for Ole e 1 (OR 3.5, CI 95 %, 1.6-7.6, p = 0.0014), and Phl p 5 (OR 11.9, CI 95 %, 4.1-35.2, p < 0.001). When analysing this association using a logistic regression model, Phl p 5 was the only allergen associated with the risk of being sensitised to profilin (p = 0.0023). Conclusions: In patients sensitised to profilin, the concordance between SPT and CRD is much lower than in those not sensitised to profilin. CRD is able to provide refined information about which pollens increase the risk of sensitisation to profilin