Clinical features and immune mechanisms directly linked to the altered liver function in patients with rheumatoid arthritis.

BACKGROUND: The aim of this study was to explore the impact of arthritis on liver function using different approaches in vivo and in vitro. METHODS: A cross-sectional study was performed on 330 non-obese/non-T2DM subjects: 180 RA patients, 50 NAFLD non-RA patients, and 100 healthy donors (HDs). A longitudinal study was conducted on 50 RA patients treated with methotrexate for six months. Clinical and laboratory parameters and markers of liver disease were collected. Mechanistic studies were carried out in both the CIA mouse model and hepatocytes treated with anti-citrullinated protein antibodies (ACPAs). RESULTS: RA patients have an increased risk of suffering from liver disease independent of obesity or T2DM. This risk was associated with factors such as insulin resistance, autoantibodies, inflammation, and component C3. Methotrexate treatment for six months was associated with liver abnormalities in those newly-diagnosed patients having CV risk factors. ACPAs induced a defective hepatocyte function, promoting IR and inflammation. The induction of arthritis in mice caused the infiltration of immune cells in the liver and increased inflammatory, apoptotic, and fibrotic processes. CONCLUSION: RA patients may experience mild to moderate liver inflammation due to the infiltration of T, B cells, and macrophages, and the action of ACPAs. This is independent of obesity or diabetes and linked to systemic inflammation, and disease activity levels. The negative effects of methotrexate on liver function could be restricted to the concomitant presence of cardiovascular risk factors.

Binding by calmodulin is coupled to transient unfolding of the third FF domain of Prp40A.

Human pre-mRNA processing protein 40 homolog A (hPrp40A) is a splicing factor that interacts with the Huntington's disease protein huntingtin (Htt). Evidence has accumulated that both Htt and hPrp40A are modulated by the intracellular Ca2+ sensor calmodulin (CaM). Here we report characterization of the interaction of human CM with the third FF domain (FF3 ) of hPrp40A using calorimetric, fluorescence and structural approaches. Homology modeling, differential scanning calorimetry and small angle X-ray scattering (SAXS) data show FF3 forms a folded globular domain. CaM was found to bind FF3 in a Ca2+ -dependent manner with a 1:1 stoichiometry and a dissociation constant (Kd ) of 25 ± 3 µM at 25°C. NMR studies showed that both domains of CaM are engaged in binding and SAXS analysis of the FF3 -CaM complex revealed CaM occupies an extended configuration. Analysis of the FF3 sequence showed that the anchors for CaM binding must be buried in its hydrophobic core, suggesting that binding to CaM requires unfolding of FF3 . Trp anchors were proposed based on sequence analysis and confirmed by intrinsic Trp fluorescence of FF3 upon binding of CaM and substantial reductions in affinity for Trp-Ala FF3 mutants. The consensus model of the complex showed that binding to CaM binding occurs to an extended, non-globular state of the FF3 , consistent with coupling to transient unfolding of the domain. The implications of these results are discussed in the context of the complex interplay of Ca2+ signaling and Ca2+ sensor proteins in modulating Prp40A-Htt function.

Ratio of Women with POP Using Pessary, Improvement in Urination and Quality of Life

Introduction: Pelvic organ prolapse (POP) has a general incidence of > 10% in the female population of the Western world. The pessary is a silicone device, it is inserted into the vagina to provide support to the pelvic organs. It is used as a conservative treatment to improve prolapse symptoms. Objective: To evaluate urination among women with a pessary and women without a pessary and to evaluate the effectiveness of pessary treatment in pelvic organ prolapse with voiding difficulties. Material and Methods: A prospective and quasi-experimental observational study of an analytical nature was conducted. It will consist of analyzing the results of treatment with vaginal pessaries in women with POP. A total of 60 women were chosen as a sample of the study, 50% were placed with the pessary. PGI test and uroflujometry were used. Results: The placement of pessary shows how there is a significant correlation between the quality of life of women and urination Conclusions: There is a relationship between the improvement of the quality of life and the improvement of the mycological dynamics of women in pessary treatment. However, the improvement in the quality of life cannot be attributed solely to the improvement of urinary flow, but also to the well-being caused by the reduction of POP (AU)

Introducción: El prolapso de órganos pélvicos (POP)presenta una incidencia general de > 10% en la poblaciónfemenina del mundo occidental. El pesario es un dispositivo de silicona, se introduce en la vagina para proveer soporte a los órganos pélvicos. Se utiliza como tratamientoconservador para mejorar los síntomas del prolapso.Objetivo: Evaluar las micciones entre las mujeres conpesario y las mujeres sin pesario y evaluar la efectividad deltratamiento del pesario en los prolapsos de órganos pélvicosque tienen dificultad miccionalMaterial y Métodos: Se llevó a cabo un estudioobservacional prospectivo y cuasi experimental, de carácter analítico. Consistirá en analizar los resultados detratamiento mediante pesarios vaginales en mujeres conPOP. Un total de 60 mujeres fueron elegidas como muestradel estudio, al 50% se les colocó el pesario. Se utilizó eltest PGI y la uroflujometría.Resultados: La colocación del pesario muestra comoexiste una correlación significativa entre la calidad de vidade las mujeres con POP y las micciones.Conclusiones: Existe relación entre la mejora de lacalidad de vida y la mejora de las dinámicas miccionalesde las mujeres en tratamiento con pesario. Sin embargo,la mejora de la calidad de vida no se puede atribuir únicamente a la mejora del flujo urinario, sino también al bienestar provocado por la reducción del POP (AU)

Small-angle X-ray scattering to quantify the incorporation and analyze the disposition of magnetic nanoparticles inside cells.

Access to detailed information on cells loaded with nanoparticles with nanoscale precision is of a long-standing interest in many areas of nanomedicine. In this context, designing a single experiment able to provide statistical mean data from a large number of living unsectioned cells concerning information on the nanoparticle size and aggregation inside cell endosomes and accurate nanoparticle cell up-take is of paramount importance. Small-angle X-ray scattering (SAXS) is presented here as a tool to achieve such relevant data. Experiments were carried out in cultures of B16F0 murine melanoma and A549 human lung adenocarcinoma cell lines loaded with various iron oxide nanostructures displaying distinctive structural characteristics. Five systems of water-dispersible magnetic nanoparticles (MNP) of different size, polydispersity and morphology were analyzed, namely, nearly monodisperse MNP with 11 and 13 nm mean size coated with meso-2,3-dimercaptosuccinic acid, more polydisperse 6 nm colloids coated with citric acid and two nanoflowers (NF) systems of 24 and 27 nm in size resulting from the aggregation of 8 nm MNP. Up-take was determined for each system using B16F0 cells. Here we show that SAXS pattern provides high resolution information on nanoparticles disposition inside endosomes of the cytoplasm through the structure factor analysis, on nanoparticles size and dispersity after their incorporation by the cell and on up-take quantification from the extrapolation of the intensity in absolute scale to null scattering vector. We also report on the cell culture preparation to reach sensitivity for the observation of MNP inside cell endosomes using high brightness SAXS synchrotron source. Our results show that SAXS can become a valuable tool for analyzing MNP in cells and tissues.

La ciberdefensa en los sistemas de información sanitarios militares / Cyberdefense in the Military Healthcare Information Systems

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Present and future of Spanish Military Telemedicine / Presente y futuro de la Telemedicina Militar Española. 25 años de la Unidad de Telemedicina en el Hospital Central de la Defensa «Gómez Ulla»

Telemedicine consists of the exchange of health information between healthcare professionals, and between healthcare professionals and patients, through the use of information and communications technologies (ICT). It is already considered an emerging technology in what is commonly called the «Productivity Plateau». It is also probably an exponential growth technology, in which the «trigger» for such growth will be a mixture of new technologies such as portable sensors/ wearables that detect multiple patient data (Blood Pressure, Heart Rate, Respiratory Rate, Glycaemia, Temperature, etc.), better communications (5G), augmented and mixed reality (augmented and virtual), artificial intelligence systems to improve diagnosis, etc. In Spain, Military Telemedicine is a pioneer in the field. The main mission is to provide remote health support to health professionals or military personnel deployed in Operations and remote or difficult-to-access locations. In 2021 the Spanish Telemedicine Unit at Central Defense Hospital «Gómez Ulla» will celebrate its 25Th anniversary. This article discusses the aforementioned aspects of telemedicine as an emerging technology and describes the current mission, organization and capabilities of Spanish military telemedicine, as well as its future

La Telemedicina consiste en el intercambio de información sanitaria entre profesionales sanitarios, o entre profesional sanitario y paciente, mediante el uso de las tecnologías de la información y comunicaciones (TIC). Se considera ya una tecnología emergente en el denominado «Plateau de productividad». Probablemente se trate de una tecnología de crecimiento exponencial, en la cual el «gatillo» para dicho crecimiento será una mezcla de diferentes tecnologías, como nuevos sensores portátiles que detecten múltiples datos de los pacientes (Tensión Arterial, Frecuencia cardiaca, Frecuencia respiratoria, Glucemia, Temperatura, etc), mejores comunicaciones (5G), realidad aumentada y mixta (aumentada y virtual), sistemas de inteligencia artificial para ayuda al diagnóstico, etc. En España, la Telemedicina Militar es pionera en este campo. Su misión fundamental es el apoyo y asesoramiento sanitario a distancia a personal sanitario y también no sanitario, tanto en Zona de Operaciones (ZO) como en situación de aislamiento y/o localización remota. En 2021 el Servicio de Telemedicina del Hospital Central de la Defensa «Gomez Ulla» celebrará su 25 aniversario. En el artículo se tratan los mencionados aspectos acerca de la Telemedicina como tecnología emergente y se describe la misión, organización y capacidades actuales de la Telemedicina Militar Española, así como sus perspectivas de futuro

Daylight photodynamic therapy for prevention of new actinic keratosis and keratinocyte carcinomas in organ transplants. A cryotherapy-controlled randomized clinical trial.

BACKGROUND: Organ transplant recipients (OTR) have a higher risk of actinic keratosis (AK) and keratinocyte carcinomas (KC). There are no clinical trials assessing the effectiveness of daylight photodynamic therapy (DPDT) to prevent new AK and KC in OTR. OBJECTIVES: To determine whether repeated treatments of field cancerization with DPDT are effective in preventing new AK and KC in OTR. METHODS: A randomized, intra-subject controlled, evaluator-blind, split-face and/or scalp trial, from April 2016 to October 2018. Participants were OTR older than 18 years, 1-year posttransplant, with at least 5 AK on each hemi-face/hemi-scalp. One side received six field treatments with DPDT: two sessions 15 days apart at baseline, two at 3 months and two at 9 months after baseline. Control side received lesion-directed treatment with cryotherapy (double freeze-thaw) at baseline, 3 and 9 months. Total number of lesions (AK and KC) at 21 months, number of new AK and KC at 3, 9, 15 and 21 months and treatment preferences were analysed. RESULTS: Of 24 men included, 23 were analysed at 3 months; and 21, at 9, 15 and 21 months. Mean (SD) age was 69.8 years (9.2). The total number of lesions at 21 months was 4.7 (4.3) for DPDT and 5.8 (5.0) for control side; P = 0.09. DPDT showed significantly lower means [SD] of new lesions compared to control side at 3 months (4.2 [3.4] vs. 6.8 [4.8]; P < 0.001), 9 months (3.0 [3.3] vs. 4.3 [3.4]; P = 0.04) and 15 months (3.0 [4.6] vs. 4.8 [5.0]; P = 0.02), and non-significant at 21 months (3.7 [3.5] vs. 5.0 [4.5]; P = 0.06). Most participants preferred DPDT. CONCLUSION: DPDT showed potential effectiveness in preventing new AK and KC in OTR by consecutive treatments of field cancerization. The preference for DPDT could facilitate adherence to the long-term treatment necessary in these patients.

Fat Quality Index and Risk of Cardiovascular Disease in the Sun Project.

OBJECTIVES: To examine the association between a dietary fat quality index (FQI), and the risk of incident cardiovascular events or deaths in the Seguimiento Universidad de Navarra (SUN) cohort. DESIGN: Longitudinal analysis during 10.1 years of median follow-up. Cox models were used to estimate adjusted hazard ratios (HR) of incident cardiovascular diseases (CVD) according to tertiles of FQI and of different fat subtypes. SETTING: University of Navarra, Spain. PARTICIPANTS: 19,341 middle-aged adults. MEASUREMENTS: Fat intake was measured with a validated food-frequency questionnaire. The FQI was calculated according to the ratio: (monounsaturated+polyunsaturated) / (saturated+trans fatty acids). RESULTS: We observed 140 incident cases of CVD. No association was found for FQI (HR=0.94, 95 %CI 0.61-1.47 for the highest vs the lowest tertile, p for trend=0.884). No significant associations were found for different dietary fat subtypes on CVD risk. The results suggest no clear association between a higher FQI and a higher amount of energy from fat and incidence of CVD (p for interaction: 0.259 and p for trend only among participants with a percentage of energy from fat ≥35% of total energy: 0.272). CONCLUSION: In this Mediterranean cohort, the FQI was not associated with cardiovascular events. A "heart-healthy diet" should focus its attention on dietary fat sources and should use an overall dietary pattern approach, rather than limiting the focus on fat subtypes. More research is needed to validate dietary advice on specific fatty acids intake or saturated fatty acids replacements for reducing CVD risk.

[Influence of initial protocolized treatment with steroids in length of stay and costs of community acquired pneumonia]. / Influencia de la protocolización del tratamiento inicial con corticoides en la estancia y costo de las neumonías adquiridas en la comunidad. Estudio prospectivo 2015.

OBJECTIVE: The aim of the study was to analyze the impact of steroid treatment in patients with community acquired pneumonia (CAP), both in length of stay and economical cost of admission at a clinical university hospital. METHODS: Prospective study of admitted patients with the diagnosis of CAP, both in Internal Medicine and Infectious diseases department. The study was conducted from January to march 2015; patients receiving steroids from diagnosis to end of antibiotic treatment were classified as group I; otherwise, they were considered in group II. Administration of steroids was done according to the criteria of the responsible. Cost was stablished according to CAP Diagnostic Related Group (DRG). RESULTS: Prevalence of patients younger than 65 year-old was higher in group I (p<0.05). In bivariate analyses, mean admission time was lower in group I (5.37 vs 8.88 days) (p<0.0005) and also economical cost (2,361 euros vs 3,907 euros) (p<0.0005). In multivariate analysis, factors independently associated to higher cost (>3,520 euros) were COPD (OR=2.602; 95% CI 1.074-6.305) and group II (patients with no steroids) (OR=6.2; p=0,007). CONCLUSIONS: No administration of steroids in patients with CAP was associated, together with COPD, with higher economical cost (evaluated by DRG/length of stay).

Loading dose of Dexdor® and optimal sedation during oral and maxillofacial ambulatory surgery procedures: An observational study. / Dosis de carga de Dexdor® y nivel óptimo de sedación durante procedimientos de cirugía oral y maxilofacial en régimen ambulatorio: un estudio observacional.

INTRODUCTION: Dexdor® do not include the possibility of loading dose, which could increase time to achieve adequate sedation for ambulatory procedures. The objective of this study was to evaluate the effect of several loading dose of dexmedetomidine in the time to achieve and maintain an optimal level of sedation and its clinical hemodynamic repercussion. MATERIAL AND METHODS: The IRB approved this observational study for patients that underwent oral and maxillofacial ambulatory surgery under dexmedetomidine at the University of Navarra Clinic from February 2013 to November 2014. According to the loading dose the patients were grouped into 3 categories:<0.5, 0.5, and>0.5µg/kg. Optimal level of sedation was defined as bispectral index<85. Data were analyzed using survival analysis techniques. Vasoactive drugs requirements was evaluated using exact logistic regression. RESULTS: Eighty-one patients were evaluated. Hazard ratios for patients in 0.5 and >0.5µg/kg loading dose categories for achieving a bispectral index<85 were 1.5 (95% CI 0.9, 2.6) and 1.8 (95% CI 0.8, 3.9), respectively, compared with the lowest category. Five patients (6.2%) required atropine for bradycardia. Patients in the group>0.5µg/kg showed greater risk of requiring atropine compared with the group<0.5µg/kg (odds ratio 2.2; 95% CI 0.03, 183). CONCLUSION: Loading dose of dexmedetomidine>0.5µg/kg appears minimize the time to achieve and maintain an optimal level of sedation during the first 60min of procedure. Further investigation to elucidate the association between loading dose of dexmedetomidine and subsequent atropine requirements may be warranted.

In Vitro Activities of Novel Antimicrobial Combinations against Extensively Drug-Resistant Acinetobacter baumannii.

Extensively drug-resistant (XDR) Acinetobacter spp. have emerged as a cause of nosocomial infections, especially under conditions of intensive care. Unfortunately, resistance to colistin is increasing and there is a need for new therapeutic options. We aimed to study the effect of some novel combinations against XDR Acinetobacter baumannii in an in vitro pharmacokinetics-pharmacodynamics (PK/PD) model. Three nonrelated clinical strains of XDR A. baumannii were investigated. Antibiotic-simulated regimens were colistin at 3 MU every 8 h (q8h) (first dose, 6 MU), daptomycin at 10 mg/kg of body weight q24h, imipenem at 1 g q8h, and ertapenem at 1 g q24h. Combination regimens included colistin plus daptomycin, colistin plus imipenem, and imipenem plus ertapenem. Samples were obtained at 0, 1, 2, 4, 8, and 24 h. Among the single-agent regimens, only the colistin regimen resulted in significant reductions in log10 CFU per milliliter compared to the control for all the strains tested. Although colistin achieved bactericidal activity at 4 h, it was not able to reach the limit of detection (1 log10 CFU/ml). One strain had significant regrowth at 24 h without the emergence of resistance. Daptomycin-colistin combinations led to a significant reduction in levels of log10 CFU per milliliter that were better than those achieved with colistin as a single-agent regimen, reaching the limit of detection at 24 h against all the strains. The combination of imipenem plus ertapenem outperformed the colistin regimen, although the results did not reach the limit of detection, with significant regrowth at 24 h. Similarly, colistin-plus-imipenem combinations reduced the levels of log10 CFU per milliliter at 8 h, with significant regrowth at 24 h but with development of resistance to colistin. We have shown some potentially useful alternatives for the treatment of extensively drug-resistant A. baumannii. Among them, the daptomycin-colistin combination was the most effective and should be investigated in future studies.

Do Skin Prick Test and In Vitro Techniques Diagnose Sensitization to Peach Lipid Transfer Protein and Profilin Equally Well in Allergy to Plant Food and Pollen?

OBJECTIVE: To compare the skin prick test (SPT) with in vitro techniques (single and multiplex fluorescence enzyme-immunoassay [FEIA]) for detecting sensitization to profilin and lipid transfer protein (LTP). METHODS: We retrospectively studied 181 patients with pollen and/or plant food allergy and 61 controls. SPT was performed with date palm profilin (Pho d 2) and peach LTP (Pru p 3), and specific IgE (sIgE) to Phl p 12 and Pru p 3 was analyzed using single FEIA and microarray. RESULTS: Fifteen of 201 patients with negative results for LTP in the SPT were sensitized to this allergen in the in vitro tests, and 18 of 41 patients with positive results for LTP in the SPT were not sensitized according to the in vitro tests. Seventeen of 186 patients with negative results for profilin in the SPT were sensitized to Phl p 12 by serum sIgE, and 30 out of 56 patients with positive results for profilin in SPT were not sensitized to Phl p 12 according to the other tests. Moderate agreement was observed between the 3 techniques studied. CONCLUSIONS: SPT is a sensitive technique for detecting sensitization to LTP and profilin. Its results are similar to those of in vitro techniques, especially in patients with negative SPT results for peach LTP and palm tree profilin.

Estudio mediante densitometría y ergoespirometría de los efectos de un programa de ejercicio físico en pacientes con cirrosis hepática y sobrepeso / Study by densitometry and ergospirometry of the effects of an exercise programme in overweight patients with liver cirrhosis

Objetivo: Estudiar los efectos del programa de ejercicio físico moderado sobre la composición corporal y la capacidad de esfuerzo evaluadas mediante densitometría y ergoespirometría, respectivamente, en pacientes con cirrosis y sobrepeso. Pacientes y metodología: Se incluyeron 14 pacientes con cirrosis y sobrepeso compensados que realizaron un programa de ejercicio físico moderado durante tres meses de una hora, tres días/semana. Se midió la variación antropométrica, la composición corporal mediante densitometría, la capacidad de esfuerzo mediante ergoespirometría y la calidad de vida (SF-36). Resultados: Al final del estudio, respecto al inicio, no hubo diferencias en el índice de masa corporal. Encontramos aumento de la masa muscular total y disminución de la masa grasa total. Aumentó el tiempo de esfuerzo total y el tiempo de esfuerzo aerobio. La presión arterial media y la creatinina sérica disminuyeron. La calidad de vida mejoró en todos los dominios del SF-36 aunque alcanzó significación estadística en la función física. Conclusiones: Un programa de ejercicio físico moderado disminuye la masa grasa y aumenta la masa muscular y la capacidad de esfuerzo en pacientes con cirrosis y sobrepeso (AU)

Objective: To study the effects of a moderate exercise programme on body composition and effort capacity evaluated by means of densitometry and ergospirometry, respectively, in overweight patients with cirrhosis. Patients and methods: Fourteen compensated overweight patients with cirrhosis underwent a moderate exercise programme during 3 months one hour 3 days/week. We analyzed the changes in anthropometric measures, body composition by densitometry, effort capacity by ergospirometry and quality of life by SF-36 questionnaire. Results: At the end of the study there were not differences in body mass index with respect to basal values, but we observed an increase in total body muscle mass evaluated by densitometry and a decrease in total fat body mass. Ergospirometry showed an increase in effort time and in aerobic effort time. Mean arterial pressure and serum creatinine decreased at the end of the study. With respect to quality of life, there was an improvement in all SF-36 domains that reached statistical significance in physical functioning. Conclusions: A moderate exercise programme decreases total body fat and increases total body muscle mass and effort capacity in overweight patients with cirrhosis (AU)

Early skin testing is effective for diagnosis of hypersensitivity reactions occurring during anesthesia.

Allergic skin tests have to be performed 4-6 weeks after an allergic anesthetic reaction. Patients with allergic reactions during anesthesia were prospectively included (n = 44). Skin tests were performed in two stages: (i) Stage 1 (S1), 0-4 days after the reaction; and (ii) Stage 2 (S2), 4-8 weeks after. Five (11.5%) surgical procedures were suspended due to the reaction. Positive skin tests were obtained in 25/44 patients (57%). Allergic diagnosis was carried out at S1 in 15/25 (60%) and at S2 in 10/25 (40%). Three patients resulted positive only in S1. Overall agreement among S1 and S2 skin tests was 70.45%. The kappa statistic was 0.41 (P-value = 0.002). Odds ratio of obtaining a false negative in S1 (compared with S2) was 3.33. Early allergological study is useful, could minimize false negatives, but should be considered as a complement to late skin tests.

Estudio del beneficio de un programa de ejercicio físico y suplementos de aminoácidos ramificados en la dieta dirigido a pacientes con cirrosis hepática / Study of the benefit of an exercise programme and branched amino acid supplements in patients with liver cirrhosis

Objetivo: Analizar un programa de ejercicio físico moderado y sus efectos sobre la masa muscular y la tolerancia al esfuerzo en pacientes con cirrosis. Pacientes y métodos: Se estudiaron 17 pacientes con cirrosis hepática compensada divididos aleatoriamente en dos grupos: grupo ejercicio (n=8), que realizó un programa de ejercicio físico moderado durante 12 semanas, y grupo control (n=9). Todos los pacientes recibieron 10 g/día de leucina. Se analizaron cambios antropométricos, tolerancia al ejercicio y calidad de vida; además, se evaluó la seguridad durante el programa. Resultados: En el grupo ejercicio se observó un aumento en el perímetro del m. cuádriceps (p=0,02) y una mejora de la tolerancia al esfuerzo en el test de la marcha (p=0,01) y el test de los escalones (p=0,02). Además, en este grupo mejoró la calidad de vida de forma significativa. No observamos complicaciones de la cirrosis, deterioro hemodinámico o de la función renal en ninguno de los dos grupos durante el estudio. Conclusión: El ejercicio físico moderado en pacientes con cirrosis compensada es seguro, aumenta la masa muscular y mejora la tolerancia al esfuerzo y la calidad de vida (AU)

Objetive: To evaluate the efficacy and safety of an exercise programme to increase muscle mass, effort tolerance and quality of life in cirrhotic patients. Patients and methods: Seventeen compensated cirrhotic patients were randomized into either an exercise group (n=8) or a control group (n=9). The programme of moderate exercise was given for 12 weeks. All patients received oral leucine (10 g/day) during the study. Anthropometric measurements, effort tolerance and quality of life were determined at study start and end. We also analysed the safety during the study. Results: In the exercise group thigh circumference increased (p=0.02) and effort tolerance improved (p=0.01) and 2-min step test (p=0.02). Moreover, quality of life improved significantly in this group. In the control group there were no statistically significant changes in any of the studied parameters. We did not observe complications of cirrhosis in either group. Conclusion: Our results suggest that moderate physical exercise in patients with compensated cirrhosis is safe and improves quality of life, effort tolerance and muscle mass (AU)

Silica SBA-15 template assisted synthesis of ultrasmall and homogeneously sized copper nanoparticles.

The synthesis of spherical copper nanoparticles with extremely narrow size distribution by electroless copper deposition on mesoporous silica support is described. The materials were characterized by nitrogen sorption, transmission electron microscopy, x-ray diffractometry and Fourier transform infrared spectroscopy. The copper nanoparticles have a cubic crystalline structure and an average particle size of 5.5 +/- 0.8 nm. The copper nanoparticles are stable, without detectable oxidation or further agglomeration under ambient conditions even after months. These results demonstrate that electroless copper reduction can be conducted and constrained within the mesoporous silica framework, which pave the way for engineered mesoreactors.

Biexponential analysis of diffusion-tensor imaging of the brain in patients with cirrhosis before and after liver transplantation.

BACKGROUND AND PURPOSE: DTI has shown increased MD of water molecules in the brain of patients with cirrhosis, consistent with low-grade edema. This study further characterizes this edema by using biexponential analysis of DTI data, a technique that may differentiate cytotoxic and vasogenic edema. MATERIALS AND METHODS: A total of 41 patients with cirrhosis awaiting liver transplantation and 16 healthy controls were studied by DTI by using a single-shot echo-planar technique with 11 b-values (range, 0-7500 s/mm(2)) and 6 noncollinear directions. Measurements were fitted to biexponential function to determine MD and FA for the fast and slow diffusion components. Regions of interest were selected in the parietal white matter and corticospinal tract. The assessment was repeated 1 year after liver transplantation in 24 of these patients. RESULTS: In parietal white matter, patients with cirrhosis showed an increase in fast MD and a decrease in fast FA that normalized after liver transplantation. In the corticospinal tract, there was an increase in fast and slow MD that normalized after transplantation, and a decrease in FA that persisted posttransplantation. There was no association of DTI parameters with minimal HE (n =12). CONCLUSIONS: Biexponential analysis of DTI supports the presence of edema in the brain of patients with cirrhosis that reverts after transplantation. In parietal white matter, the increase in brain water was mainly located in the interstitial compartment, while the corticospinal tract showed a mixed pattern (intra- and extracellular). In addition, the findings on posttransplantation were consistent with microstructural damage along the corticospinal tract.

Risk factors of A/H1N1 etiology in pneumonia and its impact on mortality.

OBJECTIVE: Pandemic flu has changed the epidemiology of pneumonia, thus challenging the prediction of etiology and outcome. We analyze the risk factors to predict influenza A/H1N1 infection in patients with pneumonia, and the impact of this etiology on mortality during a pandemic period. Differences between pneumonia with or without A/H1N1 coinfection are described. METHODS: Retrospective observational study in 364 consecutive patients hospitalized with pneumonia during the A/H1N1 pandemic flu, April-December 2009. RESULTS: 294 patients (80.5%) had A/H1N1(-) pneumonia, 47 (13.2%) A/H1N1(+) pneumonia, and 23 (6.3%) coinfection. Mortality during hospitalization was 24/294 (8.2%), 8/47 (16.7%), 2/23 (8.7%) respectively. A regression logistic analysis (Area under curve, AUC 0.81) to predict A/H1N1(+) pneumonia identified four independent variables: age < 60 years (Odds ratio, OR 5.9), multilobar infiltrates (OR 7.7), C-reactive protein (CRP) < 10 mg/dL (OR 2.8), and leukopenia < 5000/mm(3) (OR 3.4). Risk factors for in-hospital mortality in the whole group were A/H1N1 (+) etiology and LDH > 600 IU/L (OR 4.1) when adjusting for PSI, and hypoxemia (OR 4.2) when adjusting for CURB 65 (AUC 0.81). Heart disease (OR 27.4) and LDH > 600 IU/L (OR 10.5) were risk factors for in-hospital mortality in A/H1N1(+) patients (AUC 0.81) CONCLUSION: Leukopenia, multilobar infiltrates, CRP<10 mg/dl and age < 60 years were independently associated with A/H1N1(+) etiology. Pandemic A/H1N1(+) increased mortality pneumonia. Heart disease and LDH > 600 were independently associated with mortality in A/H1N1(+) pneumonia.