Current status of the reporting quality of abstracts in systematic reviews related to implant dentistry: a literature survey.

The aim of this study was to assess the reporting quality of abstracts in systematic reviews (SRs) related to implant dentistry and to assess the possible factors associated with the reporting quality. Abstracts of SRs in the field of implant dentistry, published in the last 5 years, were searched. The reporting quality was assessed and scored using the PRISMA for Abstracts checklist (PRISMA-A). The overall PRISMA-A score (OPS) and relative score (OPS%) per review were calculated according to adherence to the criteria presented in the checklist. Multivariable linear regression was performed to identify possible factors associated with reporting quality. Overall, 310 SRs were eligible for this study. Based on the maximum PRISMA-A score (score of 12), the mean OPS was 6.5 and OPS% was 54.2%. The items 'title', 'objectives', and 'number of included studies' were those most frequently reported in the abstracts, while the items 'registration' and 'funding' were the least reported. According to multivariable linear regression, the geographical origin of the articles was the only factor associated with better quality of abstract reporting, with higher OPS for SRs from Europe when compared to North America (coefficient 0.73; P = 0.049). The reporting quality of abstracts in SRs related to implant dentistry is suboptimal and needs to be improved. Journals should encourage adherence to reporting checklists in SRs.

Conjuring up a ghost: structural and functional characterization of FhuF, a ferric siderophore reductase from E. coli.

Iron is a fundamental element for virtually all forms of life. Despite its abundance, its bioavailability is limited, and thus, microbes developed siderophores, small molecules, which are synthesized inside the cell and then released outside for iron scavenging. Once inside the cell, iron removal does not occur spontaneously, instead this process is mediated by siderophore-interacting proteins (SIP) and/or by ferric-siderophore reductases (FSR). In the past two decades, representatives of the SIP subfamily have been structurally and biochemically characterized; however, the same was not achieved for the FSR subfamily. Here, we initiate the structural and functional characterization of FhuF, the first and only FSR ever isolated. FhuF is a globular monomeric protein mainly composed by α-helices sheltering internal cavities in a fold resembling the "palm" domain found in siderophore biosynthetic enzymes. Paramagnetic NMR spectroscopy revealed that the core of the cluster has electronic properties in line with those of previously characterized 2Fe-2S ferredoxins and differences appear to be confined to the coordination of Fe(III) in the reduced protein. In particular, the two cysteines coordinating this iron appear to have substantially different bond strengths. In similarity with the proteins from the SIP subfamily, FhuF binds both the iron-loaded and the apo forms of ferrichrome in the micromolar range and cyclic voltammetry reveals the presence of redox-Bohr effect, which broadens the range of ferric-siderophore substrates that can be thermodynamically accessible for reduction. This study suggests that despite the structural differences between FSR and SIP proteins, mechanistic similarities exist between the two classes of proteins.

How Thermophilic Gram-Positive Organisms Perform Extracellular Electron Transfer: Characterization of the Cell Surface Terminal Reductase OcwA.

Extracellular electron transfer is the key process underpinning the development of bioelectrochemical systems for the production of energy or added-value compounds. Thermincola potens JR is a promising Gram-positive bacterium to be used in these systems because it is thermophilic. In this paper, we describe the structural and functional properties of the nonaheme cytochrome OcwA, which is the terminal reductase of this organism. The structure of OcwA, determined at 2.2-Å resolution, shows that the overall fold and organization of the hemes are not related to other metal reductases and instead are similar to those of multiheme cytochromes involved in the biogeochemical cycles of nitrogen and sulfur. We show that, in addition to solid electron acceptors, OcwA can also reduce soluble electron shuttles and oxyanions. These data reveal that OcwA can work as a multipurpose respiratory enzyme allowing this organism to grow in environments with rapidly changing availability of terminal electron acceptors without the need for transcriptional regulation and protein synthesis.IMPORTANCE Thermophilic Gram-positive organisms were recently shown to be a promising class of organisms to be used in bioelectrochemical systems for the production of electrical energy. These organisms present a thick peptidoglycan layer that was thought to preclude them to perform extracellular electron transfer (i.e., exchange catabolic electrons with solid electron acceptors outside the cell). In this paper, we describe the structure and functional mechanisms of the multiheme cytochrome OcwA, the terminal reductase of the Gram-positive bacterium Thermincola potens JR found at the cell surface of this organism. The results presented here show that this protein can take the role of a respiratory "Swiss Army knife," allowing this organism to grow in environments with soluble and insoluble substrates. Moreover, it is shown that it is unrelated to terminal reductases found at the cell surface of other electroactive organisms. Instead, OcwA is similar to terminal reductases of soluble electron acceptors. Our data reveal that terminal oxidoreductases of soluble and insoluble substrates are evolutionarily related, providing novel insights into the evolutionary pathway of multiheme cytochromes.

Three-dimensional changes to the upper airway after maxillomandibular advancement with counterclockwise rotation: a systematic review and meta-analysis.

The aim of this study was to evaluate the effect of counterclockwise (CCW) rotation and maxillomandibular advancement (MMA) on the upper airway space using three-dimensional images. An electronic search was performed in the PubMed, Cochrane Library, Scopus, Virtual Health Library, Web of Science, and OpenGrey databases (end date July 2016); a hand-search of primary study reference lists was also conducted. The inclusion criteria encompassed computed tomography evaluations of the upper airway spaces of adult patients undergoing orthognathic surgery with CCW rotation and MMA. The articles were evaluated for risk of bias with a tool for before-and-after studies. A meta-analysis was performed with the mean differences using a random-effects model. Heterogeneity was assessed with the Q-test and the I2 index. The meta-analysis revealed significant (P<0.001) increases in both the total airway volume (effect size of 6832mm3 and confidence interval of 5554-8109mm3) and the minimum axial area (effect size of 92mm2 and confidence interval of 70-113mm2). The heterogeneity was low in both comparisons (I2=38% and 7%, respectively). The technique of mandibular advancement with CCW rotation produced significant increases in the volumes and areas of the upper airway spaces.

Factores epidemiológicos y sociodemográficos asociados al síndrome de abstinencia alcohólica complicado / Epidemiological and sociodemographic factors associated with complicated alcohol withdrawal syndrome

Objetivos. Analizar la influencia de los factores epidemiológicos y sociodemográficos en el síndrome de abstinencia alcohólica (SAA) complicado. Material y métodos. Estudio multicéntrico, observacional, prospectivo de enfermos consecutivos con SAA ingresados en servicios de Medicina Interna. Se registraron datos sociodemográficos, epidemiológicos, clínicos y evolutivos. Se definió SAA complicado como aquel que había cursado con convulsiones o delirium tremens. Resultados. Se estudiaron 228 episodios de SAA en 219 pacientes. La edad media fue de 54,5 años (DE 11,5), y el 90,8% fueron hombres. El SAA fue la causa de ingreso en el 39,9%. El 27,1% de los casos presentaron crisis comiciales y el 32,4% delirium tremens. La cantidad ingerida de alcohol diaria fue 17,8 unidades de bebida estándar (DE 21,4), con 16,6 años de dependencia (DE 11,3). El patrón de abuso de alcohol fue regular en el 82,8%. Vivían casados o en pareja el 38,4% y el 45,6% tenía hijos. Un 72,7% estaba en paro o era pensionista. El 68,5% solo habían cursado estudios primarios. El 4,8% consumía cannabis, 5,2% cocaína y 3% opiáceos. Las variables independientes relacionadas con SAA complicado fueron: consumo de alguna droga diferente del alcohol (OR 5,3; IC 95% 1,5-18,7), bajo nivel de estudios (OR 3,4; IC 95% 1,6-7,3) y el ingreso por SAA (OR 2,9; IC 95% 1,5-5,6). El área ROC del modelo fue de 0,718 (IC 95% 0,643-0,793). Conclusiones. El consumo concomitante de otras drogas de abuso y el nivel bajo de estudios pueden ayudar en la identificación de pacientes con riesgo de SAA complicado (AU)

Objectives. To analyse the influence of epidemiological and sociodemographic factors in complicated alcohol withdrawal syndrome (AWS). Material and methods. A multicentre, observational prospective study was conducted on consecutively added patients with AWS hospitalised in internal medicine departments. We recorded sociodemographic, epidemiological, clinical and progression data. Complicated AWS was defined as that which progressed with seizures or delirium tremens. Results. We studied 228 episodes of AWS in 219 patients. The mean age was 54.5 years (SD, 11.5), and 90.8% were men. AWS was the cause for hospitalisation in 39.9% of the patients. Some 27.1% of the cases presented seizures, and 32.4% presented delirium tremens. The daily quantity of alcohol ingested was 17.8 standard drink units (SD, 21.4), with 16.6 years of dependence (SD, 11.3). The pattern of alcohol abuse was regular in 82.8% of the patients. Some 38.4% of the patients were married or had a partner, and 45.6% had children. Some 72.7% of the patients were unemployed or retired. Some 68.5% had only completed primary studies. Some 4.8% consumed cannabis, 5.2% consumed cocaine and 3% consumed opioids. The independent variables related to complicated AWS were consumption of a drug other than alcohol (OR, 5.3; 95% CI 1.5-18.7), low education level (OR, 3.4; 95% CI 1.6-7.3) and hospitalisation for AWS (OR, 2.9; 95% CI 1.5-5.6). The model's receiver operating characteristic area was 0.718 (95% CI 0.643-0.793). Conclusions. Concomitant drug abuse and a low educational level could help identify patients at risk of complicated AWS (AU)

Epidemiological and sociodemographic factors associated with complicated alcohol withdrawal syndrome. / Factores epidemiológicos y sociodemográficos asociados al síndrome de abstinencia alcohólica complicado.

OBJECTIVES: To analyse the influence of epidemiological and sociodemographic factors in complicated alcohol withdrawal syndrome (AWS). MATERIAL AND METHODS: A multicentre, observational prospective study was conducted on consecutively added patients with AWS hospitalised in internal medicine departments. We recorded sociodemographic, epidemiological, clinical and progression data. Complicated AWS was defined as that which progressed with seizures or delirium tremens. RESULTS: We studied 228 episodes of AWS in 219 patients. The mean age was 54.5 years (SD, 11.5), and 90.8% were men. AWS was the cause for hospitalisation in 39.9% of the patients. Some 27.1% of the cases presented seizures, and 32.4% presented delirium tremens. The daily quantity of alcohol ingested was 17.8 standard drink units (SD, 21.4), with 16.6 years of dependence (SD, 11.3). The pattern of alcohol abuse was regular in 82.8% of the patients. Some 38.4% of the patients were married or had a partner, and 45.6% had children. Some 72.7% of the patients were unemployed or retired. Some 68.5% had only completed primary studies. Some 4.8% consumed cannabis, 5.2% consumed cocaine and 3% consumed opioids. The independent variables related to complicated AWS were consumption of a drug other than alcohol (OR, 5.3; 95% CI 1.5-18.7), low education level (OR, 3.4; 95% CI 1.6-7.3) and hospitalisation for AWS (OR, 2.9; 95% CI 1.5-5.6). The model's receiver operating characteristic area was 0.718 (95% CI 0.643-0.793). CONCLUSIONS: Concomitant drug abuse and a low educational level could help identify patients at risk of complicated AWS.

Dabigatrán: experiencia en la práctica clínica habitual / Dabigatran: experience in standard clinical practice

Introducción y objetivos. Dabigatrán es un fármaco anticoagulante, inhibidor directo de la trombina, aprobado para la prevención de ictus isquémico secundario a fibrilación auricular no valvular. El objetivo de este estudio fue determinar la eficacia de dabigatrán en la práctica clínica para la prevención de eventos isquémicos cerebrales asociados a fibrilación auricular no valvular, así como su perfil de tolerancia y seguridad. Material y métodos. Estudio descriptivo y retrospectivo en el que se incluyó a todos los pacientes que iniciaron tratamiento anticoagulante con dabigatrán entre los meses de noviembre de 2011 y septiembre de 2012. Se realizó seguimiento desde el comienzo del tratamiento hasta junio de 2013. Se determinó la incidencia de eventos isquémicos de origen cerebral, cardíaco y periférico, así como la aparición de efectos adversos y complicaciones hemorrágicas, determinando su localización y gravedad. Resultados. Se analizó a 316 pacientes con una edad media de 76,46±8,37 años, de los que el 53,5% eran varones. Dos pacientes (0,55/100 pacientes-año) presentaron ictus isquémico (incluyendo una amaurosis fugax). Ocho (2,18/100 pacientes-año) tuvieron un evento adverso isquémico, que fue de origen cardíaco en 5 (1,36/100 pacientes-año) casos y periférico en 3 (0,81/100 pacientes-año). Cuarenta (10,91/100 pacientes-año) tuvieron una complicación hemorrágica: 32 hemorragias menores (8,73/100 pacientes-año) y 8 mayores (2,18/100 pacientes-año). Conclusiones. Dabigatrán en la práctica clínica habitual es eficaz en la prevención de ictus y presenta un perfil de seguridad similar al reportado en los ensayos clínicos (AU)

Introduction and objectives. Dabigatran is an anticoagulant drug and a direct thrombin inhibitor and has been approved for the prevention of ischaemic stroke secondary to nonvalvularauricular auricular fibrillation. The aim of this study was to determine the efficacy of dabigatran in clinical practice for preventing cerebral ischaemic events associated with nonvalvularauricular auricular fibrillation, as well as its tolerance and safety profile. Material and methods. A descriptive and retrospective study was conducted, which included all patients who started anticoagulant treatment with dabigatran between November 2011 and September 2012. Follow-up was performed from the start of treatment until June 2013. The incidence of ischaemic events of cerebral, cardiac and peripheral origin was recorded, as was the onset of adverse effects and haemorrhagic complications, whose location and severity were determined. Results. We analysed 316 patients, with a mean age of 76.46±8.37 years, of whom 53.5% were men. Two patients (0.55/100 patient-years) presented ischaemic stroke (including one amaurosis fugax). Eight (2.18/100 patient-years) patients had an adverse ischaemic event, whose origin was cardiac in 5 (1.36/100 patient-years) cases and peripheral in 3 (0.81/100 patient-years). Forty (10.91/100 patient-years) patients had a haemorrhagic complication: 32 minor (8.73/100 patient-years) and 8 major (2.18/100 patient-years) haemorrhages. Conclusions. Dabigatran is effective in standard clinical practice in preventing stroke and has a safety profile similar to that reported in the clinical trials (AU)

Nature of the Surface-Exposed Cytochrome-Electrode Interactions in Electroactive Biofilms of Desulfuromonas acetoxidans.

Metal-respiring bacteria are microorganisms capable of oxidizing organic pollutants present in wastewater and transferring the liberated electrons to an electrode. This ability has led to their application as catalysts in bioelectrochemical systems (BESs), a sustainable technology coupling bioremediation to electricity production. Crucial for the functioning of these BESs is a complex protein architecture consisting of several surface-exposed multiheme proteins, called outer membrane cytochromes, wiring the cell metabolism to the electrode. Although the role of these proteins has been increasingly understood, little is known about the protein-electrode interactions and their impact on the performance of BESs. In this study, we used surface-enhanced resonance Raman spectroscopy in combination with electrochemical techniques to unravel the nature of the protein-electrode interaction for the outer membrane cytochrome OmcB from Desulfuromonas acetoxidans (Dace). Comparing the spectroelectrochemical properties of OmcB bound directly to the electrode surface with those of the same protein embedded inside an electroactive biofilm, we have shown that the surface-exposed cytochromes of Dace biofilms are in direct contact with the electrode surface. Even if direct binding causes protein denaturation, the biofilm possesses the ability to minimize the extent of the damage maximizing the amount of cells in direct electrical communication with the electrode.

Dabigatran: Experience in standard clinical practice. / Dabigatrán: experiencia en la práctica clínica habitual.

INTRODUCTION AND OBJECTIVES: Dabigatran is an anticoagulant drug and a direct thrombin inhibitor and has been approved for the prevention of ischaemic stroke secondary to nonvalvularauricular auricular fibrillation. The aim of this study was to determine the efficacy of dabigatran in clinical practice for preventing cerebral ischaemic events associated with nonvalvularauricular auricular fibrillation, as well as its tolerance and safety profile. MATERIAL AND METHODS: A descriptive and retrospective study was conducted, which included all patients who started anticoagulant treatment with dabigatran between November 2011 and September 2012. Follow-up was performed from the start of treatment until June 2013. The incidence of ischaemic events of cerebral, cardiac and peripheral origin was recorded, as was the onset of adverse effects and haemorrhagic complications, whose location and severity were determined. RESULTS: We analysed 316 patients, with a mean age of 76.46±8.37 years, of whom 53.5% were men. Two patients (0.55/100 patient-years) presented ischaemic stroke (including one amaurosis fugax). Eight (2.18/100 patient-years) patients had an adverse ischaemic event, whose origin was cardiac in 5 (1.36/100 patient-years) cases and peripheral in 3 (0.81/100 patient-years). Forty (10.91/100 patient-years) patients had a haemorrhagic complication: 32 minor (8.73/100 patient-years) and 8 major (2.18/100 patient-years) haemorrhages. CONCLUSIONS: Dabigatran is effective in standard clinical practice in preventing stroke and has a safety profile similar to that reported in the clinical trials.

Heterologous expression and purification of a multiheme cytochrome from a Gram-positive bacterium capable of performing extracellular respiration.

Microbial electrochemical technologies are emerging as environmentally friendly biotechnological processes. Recently, a thermophilic Gram-positive bacterium capable of electricity production in a microbial fuel cell was isolated. Thermincola potens JR contains several multiheme c-type cytochromes that were implicated in the process of electricity production. In order to understand the molecular basis by which Gram-positive bacteria perform extracellular electron transfer, the relevant proteins need to be characterized in detail. Towards this end, a chimeric gene containing the signal peptide from Shewanella oneidensis MR-1 small tetraheme cytochrome c (STC) and the gene sequence of the target protein TherJR_0333 was constructed. This manuscript reports the successful expression of this chimeric gene in the Gram-negative bacterium Escherichia coli and its subsequent purification and characterization. This methodology opens the possibility to study other multiheme cytochromes from Gram-positive bacteria, allowing the extracellular electron transfer mechanisms of this class of organisms to be unraveled.

Analysis of the residual alignment of a paramagnetic multiheme cytochrome by NMR.

Residual dipolar couplings measured by NMR spectroscopy reveal that the rhombicity of the electronic structure of low-spin paramagnetic hemes determines their relative contribution to the preferential orientation of a protein with multiple hemes when placed in a strong magnetic field.

Biofunctionalized nanoparticles with pH-responsive and cell penetrating blocks for gene delivery.

Bridging the gap between nanoparticulate delivery systems and translational gene therapy is a long sought after requirement in nanomedicine-based applications. However, recent developments regarding nanoparticle functionalization have brought forward the ability to synthesize materials with biofunctional moieties that mimic the evolved features of viral particles. Herein we report the versatile conjugation of both cell penetrating arginine and pH-responsive histidine moieties into the chitosan polymeric backbone, to improve the physicochemical characteristics of the native material. Amino acid coupling was confirmed by 2D TOCSY NMR and Fourier transform infrared spectroscopy. The synthesized chitosan-histidine-arginine (CH-H-R) polymer complexed plasmid DNA biopharmaceuticals, and spontaneously assembled into stable 105 nm nanoparticles with spherical morphology and positive surface charge. The functionalized delivery systems were efficiently internalized into the intracellular compartment, and exhibited remarkably higher transfection efficiency than unmodified chitosan without causing any cytotoxic effect. Additional findings regarding intracellular trafficking events reveal their preferential escape from degradative lysosomal pathways and nuclear localization. Overall, this assembly of nanocarriers with bioinspired moieties provides the foundations for the design of efficient and customizable materials for cancer gene therapy.

Crystallization and preliminary crystallographic studies of FoxE from Rhodobacter ferrooxidans SW2, an Fe(II) oxidoreductase involved in photoferrotrophy.

FoxE is a protein encoded by the foxEYZ operon of Rhodobacter ferrooxidans SW2 that is involved in Fe(II)-based anoxygenic photosynthesis (`photoferrotrophy'). It is thought to reside in the periplasm, where it stimulates light-dependent Fe(II) oxidation. It contains 259 residues, including two haem c-binding motifs. As no three-dimensional model is available and there is no structure with a similar sequence, crystals of FoxE were produced. They diffracted to 2.44 Å resolution using synchrotron radiation at the Fe edge. The phase problem was solved by SAD using SHELXC/D/E and the experimental maps confirmed the presence of two haems per molecule.

Fiebre y exantema maculopapular como primeras manifestaciones de linfoma / Fever and maculopapular exanthema as first manifestation of lymphoma

No disponible

Reactivación de hepatitis B tras tratamiento con CHOP y rituximab / Reactivation of hepatitis B after treatment with CHOPand rituximab

No disponible

[Epidermiology of alcohol withdrawal syndrome. Mortality and factors of poor prognostic]. / Epidemiología del síndrome de abstinencia alcohólica. Mortalidad y factores de mal pronóstico.

INTRODUCTION: Patients with alcoholism and alcohol withdrawal syndrome (AWS) have a worse prognostic. METHODS: We have performed a retrospective analysis of the hospital discharges in with diagnosis include AWS from 1 of January of 1997 to the 31 of December of 2002. RESULTS: We identified 924 hospital stays with 2.4% of mortality (1.6% in Internal Medicine). Mortality is associated with greater age (57 years +/-15 vs. 49+/- 13, p < 0.005), with the diagnostic of hepatic cirrhosis (6.2 vs. 1.8%, p < 0.005), bacteraemia (10 vs. 1.8%, p < 0.001) and respiratory infection (9.6 vs. 1.8%, p < 0,001), with a lower mortality when AWS was secondary diagnosis (1.2 vs. 4.2%, p < 0.005). In multivariant analysis were associated with more mortality age (OR 1.03), hepatic cirrhosis (OR 3.4), bacteriemia (OR 4.5) and respiratory infection (OR 3.6). CONCLUSION: Alcohol withdrawal syndrome mortality could to benefit from treatment in an Internal Medicine Service.

Epidemiología del síndrome de abstinencia alcohólica. Mortalidad y factores de mal pronóstico / Epidemiology of alcohol withdrawal syndrome. Mortality factors of poor prognostic

Introducción: El alcoholismo y la aparición del síndrome de abstinencia alcohólica (SAA) condicionan un peor pronóstico en los pacientes que lo presentan. Métodos: Se recogieron las características epidemiológicas, evolución y mortalidad de todos los casos diagnosticados de SAA en el Complexo Hospitalario de Santiago durante los años 1997 al 2002. Resultados: Se identificaron 924 casos con una mortalidad del 2,4% (1,6% en Medicina Interna). La mortalidad se asoció con mayor edad (57 años ± 15 vs. 49± 13, p < 0,005), y con los diagnósticos de cirrosis hepática (6,2 vs. 1,8%, p < 0,005), bacteriemia (10 vs. 1,8%, p < 0,001) e infección respiratoria (9,6 vs. 1,8%, p < 0,001), con una mortalidad menor cuando el SAA fue diagnóstico secundario (1,2 vs. 4,2%, p < 0,005). En el análisis multivariante se asociaron a mayor mortalidad la edad (OR 1,03), la cirrosis hepática (OR 3,4), la bacteriemia (OR 4,5) y la infección respiratoria (OR 3,6). Conclusión: La mortalidad asociada al síndrome de abstinencia podría beneficiarse de la centralización del tratamiento en el Servicio de Medicina Interna

Introduction: Patients with alcoholism and alcohol withdrawal syndrome (AWS) have a worse prognostic. Methods: We have performed a retrospective analysis of the hospital discharges in with diagnosis include AWS from 1 of January of 1997 to the 31 of December of 2002. Results: We identified 924 hospital stays with 2.4% of mortality (1.6% in Internal Medicine). Mortality is associated with greater age (57 years ±15 vs. 49± 13, p < 0.005), with the diagnostic of hepatic cirrhosis (6.2 vs. 1.8%, p < 0.005), bacteraemia (10 vs. 1.8%, p < 0.001) and respiratory infection (9.6 vs. 1.8%, p < 0,001), with a lower mortality when AWS was secondary diagnosis (1.2 vs. 4.2%, p < 0.005). In multivariant analysis were associated with more mortality age (OR 1.03), hepatic cirrhosis (OR 3.4), bacteriemia (OR 4.5) and respiratory infection (OR 3.6). Conclusion: Alcohol withdrawal syndrome mortality could to benefit from treatment in an Internal Medicine Service

Disnea aguda y TAC helicoidal torácico / Acute dyspnea and thoracic helical CT

No disponible