A new species of Dermadena (Digenea: Lepocreadiidae) from the stone triggerfish Pseudobalistes naufragium (Tetraodontiformes: Balistidae) in the South American Pacific Ocean.

The present paper describes a new species of Dermadena (Digenea) parasitizing Pseudobalistes naufragium in Puerto Pizarro, northern Peru, using light and scanning electronic microscopy (SEM). Additionally, molecular analysis was also performed to determine the phylogenetic affinities of Dermadena within the Lepocreadiidae. The new species is differentiated from Dermadena spatiosa, Dermadena stirlingi and Dermadena lactophrysi by presenting a curved and well-developed external seminal vesicle. Also, SEM revealed numerous dome-shaped tegument protuberances forming glandular papillae with transversal wrinkles arranged roughly in concentric rows around the acetabular region, varying in size from large at the middle of the body to small at the margin. In the molecular phylogeny, the new species formed a well-supported clade with sequences of species from the Lepocreadiidae, confirming that it belongs to this family.

A checklist of helminths associated with reptiles (Tetrapoda: Reptilia) from Peru.

An annotated checklist of the helminth parasites associated with reptiles from Peru is provided, as the result of a compilation of parasitological papers published between 1963 and January 2022 and records of species deposited in national and international collections. The list provides data on hosts, developmental stage, sites of infection, geographical distribution in Peruvian territory, code of material deposited in helminthological collections, references and taxonomic notes. The database includes records of 106 different species of helminth parasites (82 nominal species and 24 taxa identified at the generic level), the majority in the adult stage. These helminth parasites come from 18 of the 25 official Peruvian regions. Nematodes have the highest richness in number of species (79 species), followed by trematodes (17 species) and cestodes (nine species). The acanthocephalans are represented by only one species. The parasites with the highest number of records were Physaloptera retusa Rudolphi, 1819 (11 hosts), Physalopteroides venancioi (Lent, Freitas & Proença, 1946) (nine hosts), Strongyluris oscari Travassos, 1923 (seven hosts), and Parapharyngodon scleratus Travassos, 1923 (five hosts), all of which are nematodes. The 106 taxa of helminth parasites have been reported infecting 55 species of reptiles in Peru, distributed in 34 genera and 14 families. The reptile species harbouring the highest number of helminth parasites are the yellow-footed tortoise Chelonoidis denticulatus (Linnaeus) with 18 species (three trematodes and 15 nematodes), followed by the Peru desert tegu Dicrodon guttulatum Duméril & Bibron (Teiidae) with 11 species (three cestodes and eight nematodes) and the yellow-spotted Amazon River turtle Podocnemis unifilis Troschel (Podocnemididae) with 10 species (five trematodes and five nematodes). Of the 524 species of reptiles reported in Peru, only 55 (>10%) are reported as hosts of helminths representing a small proportion considering the great variety of reptile hosts that inhabit the various tropical and subtropical geographical areas of Peru.

Descripción de los trastornos del equilibrio en la Unidad de Otoneurología del Hospital Clínico Herminda Martín / Description of balance disorders in the otoneurology unit of the Hospital Clinico Herminda Martin

INTRODUCCIÓN: Los trastornos del equilibrio constituyen un grupo heterogéneo de patologías. Son patologías frecuentes en medicina, representando una carga asistencial significativa en los distintos niveles de atención. En ese sentido, los estudios de frecuencia son una herramienta para entender patrones de enfermedad, como también la evaluación y planificación de una red asistencial. Material y método: Estudio descriptivo transversal sobre pacientes que asistieron al policlínico de otoneurología del Hospital Clínico Herminda Martin con motivo de consulta síntomas vestibulares durante el año 2018. Resultados: 183 pacientes cumplieron con los criterios de inclusión y exclusión, 78% (n=143) del sexo femenino y 22% (n=40) del masculino. Con una edad promedio de 58 años. El diagnóstico otoneurológico más frecuente fue vértigo posicional paroxístico benigno 34,97% (n=64), seguido de migraña vestibular 7,1% (n=13), enfermedad de Ménière 5,46% (n=10) y neuritis vestibular 4,37% (n=8). En 26,78% (n=49) no se logró un diagnóstico definitivo. Los trastornos de origen central representaron un 3,83% (n=7) y aquellos de origen no otoneurológico un 17,49% (n=32). Discusión: Los datos de frecuencia de los distintos trastornos del equilibrio registrados en el policlínico de otoneurología del Hospital Clínico Herminda Martin, son similares a la literatura internacional. Los trastornos vestibulares periféricos son los más frecuentes, de los cuales destaca el vértigo posicional paroxístico benigno representando el 34,97% del total de casos. Dentro de las causas otoneurológicas, la migraña vestibular fue la segunda causa en nuestro medio con un 7,1% del total de casos.

INTRODUCTION: Balance disorders are a heterogeneous group of diseases. They are a frequent medical condition, representing a significant healthcare burden at the different levels of care. Thus, frequency studies are a tool to understand disease patterns, as well as the evaluation and planning of a healthcare network. Material and method: Cross-sectional study of patients who attended the otoneurology out-patient clinic of the Hospital Clinico Herminda Martin with chief complaint of vestibular symptoms during 2018. Results: 183 patients met the inclusion and exclusion criteria, 143 (78%) were female and 40 (22%) male. With an average age of 58 years. The most frequent otoneurological diagnosis was benign paroxysmal positional vertigo 34.97% (n=64), followed by vestibular migraine 7.1% (n=13), Ménière's disease 5.46% (n=10) and vestibular neuritis 4.37% (n=8). In 26.78% (n=49) a definitive diagnosis was not achieved. Disorders of central origin represented 3.83% (n=7) and non-otoneurological origin 17.49% (n=32). Discussion: The frequency data of the balance disorders registered in the otoneurology out-patient clinic are similar to the international literature, peripheral vestibular disorders are the most frequent, of which benign paroxysmal positional vertigo stands out, representing 34.97% of the total cases. Among the otoneurological causes, vestibular migraine was the second cause in our study with 7.1% of the total cases

A Mediterranean diet supplemented with extra virgin olive oil or nuts improves endothelial markers involved in blood pressure control in hypertensive women.

PURPOSE: Serum nitric oxide (NO) reduction and increased endothelin-1 (ET-1) play a pivotal role in endothelial dysfunction and hypertension. Considering that traditional Mediterranean diet (TMD) reduces blood pressure (BP), the aim of this study was to analyze whether TMD induced changes on endothelial physiology elements such as NO, ET-1 and ET-1 receptors which are involved in BP control. METHODS: Non-smoking women with moderate hypertension were submitted for 1 year to interventions promoting adherence to the TMD, one supplemented with extra virgin olive oil (EVOO) and the other with nuts versus a control low-fat diet (30 participants/group). BP, NO, ET-1 and related gene expression as well as oxidative stress biomarkers were measured. RESULTS: Serum NO and systolic BP (SBP) or diastolic BP (DBP) were negatively associated at baseline, as well as between NO and ET-1. Our findings also showed a DBP reduction with both interventions. A negative correlation was observed between changes in NO metabolites concentration and SBP or DBP after the intervention with TMD + EVOO (p = 0.033 and p = 0.044, respectively). SBP reduction was related to an impairment of serum ET-1 concentrations after the intervention with TMD + nuts (p = 0.008). We also observed changes in eNOS, caveolin 2 and ET-1 receptors gene expression which are related to NO metabolites levels and BP. CONCLUSIONS: The changes in NO and ET-1 as well as ET-1 receptors gene expression explain, at least partially, the effect of EVOO or nuts on lowering BP among hypertensive women.

Hospital clinical trial: Homeopathy (Agraphis nutans 5CH, Thuya occidentalis 5CH, Kalium muriaticum 9CH and Arsenicum iodatum 9CH) as adjuvant, in children with otitis media with effusion.

BACKGROUND: Otitis media with effusion (OME) is the most common cause of paediatric hearing loss. No single treatment has proved its effectiveness. There is a lack of evidence-based medicine studies in the area of homeopathy. METHOD: A prospective randomized, double blinded interventional placebo control study was conducted. Patients, from 2 months to 12 years, with OME diagnosed by pneumatic otoscopy (PNO) and tympanometry, were randomized into two groups. Both groups received aerosol therapy (mucolytics and corticosteroids). In addition, the experimental group (EG) received homeopathy (Agraphis nutans 5CH, Thuya Occidentalis 5CH, Kalium muriaticum 9CH and Arsenicum iodatum), and the placebo group (PG) placebo, both of them for 3 months. Patients were evaluated by PNO examination and tympanometry at baseline, at 45 and 90 days. RESULTS: 97 patients were enrolled. In the EG, 61.9% of individuals were cured (PNO went from negative in the 1st visit to positive in the 3rd visit) compared with 56.8% of patients treated with placebo. 4.8% of patients in the EG suffered a recurrence (positive PNO in the 2nd visit changed to negative in the 3rd visit) while 11.4% did in the PG. No significant difference was found. Adverse events were distributed similarly, except in the case of upper respiratory tract infections, which were less frequent in EG (3 vs. 13, p: 0.009). CONCLUSION: The homeopathic scheme used as adjuvant treatment cannot be claimed to be an effective treatment in children with OME. TRIAL REGISTRATION: EUDRACT number: 2011-006086-17, PROTOCOL code: 55005646.

Effects of total dietary polyphenols on plasma nitric oxide and blood pressure in a high cardiovascular risk cohort. The PREDIMED randomized trial.

BACKGROUND AND AIM: Hypertension is one of the main cardiovascular risk factors in the elderly. The aims of this work were to evaluate if a one-year intervention with two Mediterranean diets (Med-diet) could decrease blood pressure (BP) due to a high polyphenol consumption, and if the decrease in BP was mediated by plasma nitric oxide (NO) production. METHODS AND RESULTS: An intervention substudy of 200 participants at high cardiovascular risk was carried out within the PREDIMED trial. They were randomly assigned to a low-fat control diet or to two Med-diets, one supplemented with extra virgin olive oil (Med-EVOO) and the other with nuts (Med-nuts). Anthropometrics and clinical parameters were measured at baseline and after one year of intervention, as well as BP, plasma NO and total polyphenol excretion (TPE) in urine samples. Systolic and diastolic BP decreased significantly after a one-year dietary intervention with Med-EVOO and Med-nuts. These changes were associated with a significant increase in TPE and plasma NO. Additionally, a significant positive correlation was observed between changes in urinary TPE, a biomarker of TP intake, and in plasma NO (Beta = 4.84; 95% CI: 0.57-9.10). CONCLUSIONS: TPE in spot urine sample was positively correlated with plasma NO in Med-diets supplemented with either EVOO or nuts. The statistically significant increases in plasma NO were associated with a reduction in systolic and diastolic BP levels, adding to the growing evidence that polyphenols might protect the cardiovascular system by improving the endothelial function and enhancing endothelial synthesis of NO.

Inverse association between habitual polyphenol intake and incidence of cardiovascular events in the PREDIMED study.

BACKGROUND AND AIMS: Epidemiologic and biological evidence supports an inverse association between polyphenol consumption and the risk of cardiovascular disease (CVD). However, no previous studies have prospectively evaluated the relationship between polyphenol intake and the incidence of CVD in such a comprehensive way. The aim was to evaluate the association between intakes of total polyphenol and polyphenol subgroups, and the risk of major cardiovascular events (myocardial infarction, stroke or death from cardiovascular causes) in the PREDIMED study. METHODS AND RESULTS: The present work is an observational study within the PREDIMED trial. Over an average of 4.3 years of follow-up, there were 273 confirmed cases of CVD among the 7172 participants (96.3%) who completed a validated 137-item food frequency questionnaire (FFQ) at baseline. Polyphenol consumption was calculated by matching food consumption data from the FFQ with the Phenol-Explorer database on polyphenol content of each reported food. After multivariate adjustment, a 46% reduction in risk of CVD risk was observed comparing Q5 vs. Q1 of total polyphenol intake (HR = 0.54; 95% confidence interval [CI] = 0.33-0.91; P-trend = 0.04). The polyphenols with the strongest inverse associations were flavanols (HR = 0.40; CI 0.23-0.72; P-trend = 0.003), lignans (HR = 0.51; CI 0.30-0.86; P-trend = 0.007), and hydroxybenzoic acids (HR = 0.47; CI 0.26-0.86; P-trend 0.02). CONCLUSION: Greater intake of polyphenols, especially from lignans, flavanols, and hydroxybenzoic acids, was associated with decreased CVD risk. Clinical trials are needed to confirm this effect and establish accurate dietary recommendations.

Interleukin-6 concentration changes in plasma and saliva in bisphosphonate-related osteonecrosis of the jaws.

AIM: To determine the plasma and saliva levels of IL-6 in patients with bisphosphonate-related osteonecrosis of the jaws (BRONJ) and to investigate whether there is a correlation between more advanced stages of BRONJ and levels of IL-6. MATERIAL AND METHODS: We studied three groups: group 1 consisted of 30 patients with BRONJ due to intravenous bisphosphonates (ivBP), group 2 consisted of 25 patients treated with ivBP but without BRONJ, and group 3 consisted of 15 healthy controls. In each case, we assayed plasma and saliva IL-6 samples using an ELISA test. RESULTS: Significantly, higher IL-6 values were found in both saliva and plasma in group 1 vs groups 2 and 3 (P < 0.01). Group 1 showed no differences in plasma or saliva IL-6 according to patient gender (P > 0.05), type of tumor, BRONJ location, etiology of BRONJ, or disease stage (P > 0.05). We found higher plasma and saliva IL-6 values in the more advances stages of BRONJ, although the differences were not statistically significant. CONCLUSIONS: Plasma and saliva IL-6 values were higher in our patients with BRONJ than in controls and therefore might be a useful tool for monitoring the severity of BRONJ.

Calidad del sueño relacionada con el rendimiento académico de estudiantes de medicina humana / Sleep quality related to academic performance of medicine students

La calidad del sueño est  directamente relacionada al buen funcionamiento de los procesos cognitivos, así como al bienestar de los seres humanos. En los estudiantes de Medicina Humana, los procesos de memoria a corto y largo plazo toman especial importancia para el aprendizaje del contenido académico. Objetivo: demostrar la existencia de una relación entre la calidad del sueño y el rendimiento acad‚mico de los alumnos del curso de Fisiología Humana de la Facultad de Medicina Humana de la Universidad de San Martín de Porres (Lima, Perú). Material y Métodos: se trabajó con la población de alumnos (N=384 alumnos), obteniendo 209 encuestas validas; el instrumento aplicado fue el Õndice de Calidad del Sueño de Pittsburg, conjuntamente con preguntas sobre edad y sexo. Resultado: Se encontró un total del 67,5% de malos dormidores y un 32,5% de buenos dormidores. No se halló asociación entre la calidad del sueño y el rendimiento académico (p=0,865), pero sí entre la eficiencia porcentual del sueño y la nota promedio Actitudinal (p=0,039). Conclusiones: no hubo asociación entre calidad de sueño y rendimiento académico. se recomienda integrar nuevas variables para el estudio de la calidad de sueño en estudiantes de Medicina.

Sleep quality is directly related to the good working of the cognitive processes, and also to the wellbeing of human beings. In medical students, long-term and short-term memory processes take special importance for the learning of the academic content. Objective: to demonstrate the existence of a relationship between the sleep quality and the academic performance of the students taking the subject of Human Physiology, in the School of Medicine of the San Martin de Porres University (Lima, Per£). Material and Methods: we worked with the student’s population (N=384 students), obtaining 209 valid polls; and the instrument applied was the Pittsburg Sleep Quality Index, along with age and sex questions. Results: a total of 67,5% of bad and 32,5% of good sleepers was found. Association wasn’t found between sleep quality and academic performance (p=0,865), but it was found between percentage sleep quality and the Attitudinal average mark (p=0,039). Conclusion: association wasn’t found between sleep quality and academic performance. We suggest integrating new variables for the sleep quality study in Medicine students.

Dietary intake and major food sources of polyphenols in a Spanish population at high cardiovascular risk: the PREDIMED study.

BACKGROUND AND AIMS: Epidemiological data have shown an inverse association between the consumption of polyphenol-rich foods and the risk of cardiovascular disease or overall mortality. A comprehensive estimation of individual polyphenol intake in nutritional cohorts is needed to gain a better understanding of this association. The aim of this study was to estimate the quantitative intake of polyphenols and the major dietary sources in the PREDIMED (PREvención con DIeta MEDiterránea) cohort using individual food consumption records. METHODS AND RESULTS: The PREDIMED study is a large, parallel-group, multicentre, randomised, controlled 5-year feeding trial aimed at assessing the effects of the Mediterranean diet on the primary prevention of cardiovascular disease. A total of 7200 participants, aged 55-80 years, completed a validated 1-year food frequency questionnaire (FFQ) at baseline. Polyphenol consumption was calculated by matching food consumption data from the FFQ with the recently developed Phenol-Explorer database on polyphenol content in foods. The mean total polyphenol intake was 820 ± 323 mg day⁻¹ (443 ± 218 mg day⁻¹ of flavonoids and 304 ± 156 mg day⁻¹ of phenolic acids). Hydroxycinnamic acids were the phenolic group with the highest consumption and 5-caffeoylquinic acid was the most abundantly ingested individual polyphenol. The consumption of olives and olive oil was a differentiating factor in the phenolic profile of this Spanish population compared with other countries. CONCLUSION: In Mediterranean countries, such as Spain, the main dietary source of polyphenols is coffee and fruits, but the most important differentiating factor with respect to other countries is the consumption of polyphenols from olives and olive oil.

Gazpacho consumption is associated with lower blood pressure and reduced hypertension in a high cardiovascular risk cohort. Cross-sectional study of the PREDIMED trial.

BACKGROUND AND AIM: Hypertension is a major public health problem and a leading cause of death and disability in both developed and developing countries, affecting one-quarter of the world's adult population. Our aim was to evaluate whether the consumption of gazpacho, a Mediterranean vegetable-based cold soup rich in phytochemicals, is associated with lower blood pressure (BP) and/or reduced prevalence of hypertension in individuals at high cardiovascular risk. METHODS AND RESULTS: We selected 3995 individuals (58% women, mean age 67 y) at high cardiovascular risk (81% hypertensive) recruited into the PREDIMED study. BP, weight, and dietary and physical activity data were collected. In multivariate linear regression analyses, after adjustment, moderate and high gazpacho consumption categories were associated with reduced mean systolic BP of -1.9 mm Hg [95% confidence interval (CI): -3.4; -0.6] and -2.6 mm Hg (CI: -4.2; -1.0), respectively, and reduced diastolic BP of -1.5 mm Hg (CI: -2.3; -0.6) and -1.9 mm Hg (CI: -2.8; -1.1). By multiple-adjusted logistic regression analysis, gazpacho consumption was associated with a lower prevalence of hypertension, with OR = 0.85 (CI: 0.73; 0.99) for each 250 g/week increase and OR = 0.73 (CI: 0.55; 0.98) for high gazpacho consumption groups compared to the no-consumption group. CONCLUSIONS: Gazpacho consumption was inversely associated with systolic and diastolic BP and prevalence of hypertension in a cross-sectional Mediterranean population at high cardiovascular risk. The association between gazpacho intake and reduction of BP is probably due to synergy among several bioactive compounds present in the vegetable ingredients used to make the recipe.

Crataegus laevigata decreases neutrophil elastase and has hypolipidemic effect: a randomized, double-blind, placebo-controlled trial.

Crataegus laevigata is a medicinal plant most commonly used for the treatment of heart failure and psychosomatic disorders. Based on previous experimental findings, this double-blind placebo-controlled study was aimed at finding beneficial effects of C. laevigata on biomarkers of coronary heart disease (CHD). The study included 49 diabetic subjects with chronic CHD who were randomly assigned to the treatment for 6 months with either a micronized flower and leaf preparation of C. laevigata (400 mg three times a day) or a matching placebo. Blood cell count, lipid profile, C-reactive protein, neutrophil elastase (NE) and malondialdehyde were analyzed in plasma at baseline, at one month and six months. The main results were that NE decreased in the C. laevigata group compared to the placebo group. In the C. laevigata group, baseline figures (median and interquartile range) were 35.8 (4.5) and in the placebo group 31 (5.9). At the end of the study, values were 33.2 (4.7) ng/ml and 36.7 (2.2) ng/ml, respectively; p<0.0001. C. laevigata, added to statins, decreased LDL cholesterol (LDL-C) (mean±SD) from 105±28.5 mg/dl at baseline to 92.7±25.1 mg/dl at 6 months (p=0.03), and non-HDL cholesterol from 131±37.5 mg/dl to 119.6±33 mg/dl (p<0.001). Differences between groups did not reach statistical significance at 6 months. No significant changes were observed in the rest of parameters. In conclusion, C. laevigata decreased NE and showed a trend to lower LDL-C compared to placebo as add-on-treatment for diabetic subjects with chronic CHD.

Total polyphenol excretion and blood pressure in subjects at high cardiovascular risk.

BACKGROUND AND AIMS: Dietary factors are critical for the prevention and treatment of hypertension, but data on the effects of specific nutrients on blood pressure (BP) are scarce. The aim of this study was to assess the relationship between total polyphenol excretion (TPE) in urine, as an objective measurement of total polyphenol intake and BP in an elderly population at high cardiovascular risk. METHODS AND RESULTS: Cross-sectional substudy of 589 high-risk participants entering in the PREDIMED trial. BP was measured and TPE was determined in urine by Folin-Ciocalteu assay. A significant positive association was observed between TPE in urine and daily intake of fruit and vegetables (F&V), coffee or wine after adjusting for potential confounders. The intake of 100 g of F&V (Beta=0.150;P<0.001) had a greater contribution to TPE than 100 mL of coffee (Beta=0.141;P=0.001), and the latter two foods contributed more than the consumption of 100 mL of wine (Beta=0.120;P=0.019). An inverse association was observed between urinary TPE and the prevalence of hypertension. Participants in the highest quartile of urinary TPE had a reduced prevalence of hypertension compared to those in the lowest quartile (Odds Ratio=0.64; 95% confidence interval 0.45 to 0.92; P=0.015). Systolic and diastolic BP were inversely associated with urinary TPE after adjustment for potential confounders (P=0.024 and P=0.003, respectively). CONCLUSIONS: Polyphenol intake, assessed via TPE in urine, was negatively associated with BP levels and prevalence of hypertension in an elderly Mediterranean population at high cardiovascular risk. Participants with the highest intake of polyphenol-rich foods showed the lowest BP measurements.

Is there a relationship between the kinetics of lipoprotein lipase activity after a meal and the susceptibility to hepatic steatosis development in ducks?

The difference in the ability of Pekin and Muscovy ducks to develop hepatic steatosis could result from a different peripheral lipoprotein lipase (LPL) activity, which hydrolyses triacylglycerol secreted by the liver. We studied the kinetics of plasma LPL activity in response to a meal at different ages in Pekin and Muscovy ducks. For that purpose, blood samples were taken at 5, 9, 12, 13, and 14 wk of age just before and 1, 2, 4, and 8 h after a meal. To release LPL into general circulation, an i.v. injection of heparin (400 IU/kg of BW) was administered 10 min before blood collection. For that reason, different ducks per genotype were used for each point of measurement (n = 6). Plasma LPL activity measured before the meal was negatively correlated with the weight of the fatty liver measured in the same ducks at 14 wk of age (r = -0.58, P < 0.001). Plasma triacylglycerol level measured before the meal was negatively correlated with plasma LPL activity measured in the same ducks (r = -0.31, P = 0.025) and was negatively correlated with plasma LPL activity measured in the same ducks for each age and each timing (r = -0.39, P < 0.001). At 14 wk of age for Muscovy and Pekin ducks, we observed that a high plasma LPL activity (>200 IU/L of plasma) corresponded to a relatively low development of fatty liver (190 g) induced by overfeeding, whereas a low plasma LPL activity (<150 IU/L of plasma) corresponded to a high propensity to develop fatty liver (470 g). In conclusion, plasma LPL activity measured just before the meal during the rearing period could be used as a marker of hepatic steatosis development during the overfeeding period.

Liver gene expression in relation to hepatic steatosis and lipid secretion in two duck species.

The susceptibility to development of hepatic steatosis is known to differ between Muscovy and Pekin ducks. Although some experiments were conducted to decipher these differences, few data have been produced to analyse the role of specific genes in this process. For this purpose, expression levels of genes involved in lipid (ATP citrate lyase, malic enzyme 1, fatty acid synthase, stearoyl-CoA desaturase 1, diacylglycerol O-acyl transferase 2, microsomal triglyceride transfer protein, apolipoprotein A1, apolipoprotein B, sterol regulatory element binding factor 1, hepatocyte nuclear factor 4, choline/ethanolamine phosphotransferase 1, carnitine palmitoyl transferase 1A, peroxisome proliferator-activated receptor alpha and sterol O-acyltransferase) and carbohydrate (activating transcription factor 4 or cAMP-response element binding protein, mitochondrial malate dehydrogenase 2 and carbohydrate responsive element binding protein) metabolism and in other functions were analysed in the liver of Pekin and Muscovy ducks fed ad libitum or overfed. A specific positive effect of feeding was observed on the expression of genes involved mainly in fatty acids and TG synthesis and glycolysis, and negative effect on genes involved in beta-oxidation. Interestingly, a strong species effect was also observed on stearoyl-CoA desaturase 1 and to a lesser extent on diacylglycerol O-acyl transferase 2 expression, leading to large differences in expression levels between Pekin and Muscovy overfed ducks, which could explain the difference in lipid metabolism and steatosis ability observed between the two duck species. These results should shed light on gene expression that might underlie susceptibility to hepatic steatosis in humans.

Análisis de los efectos de la concentración en el tiro libre en baloncesto / No disponible

El presente estudio intenta determinar hasta qué punto es importante la concentración en el tiro libre de baloncesto. La importancia de la concentración cobra aún mayor trascendencia por el hecho de que no puede ser manipulada externamente, es decir, que es el propio sujeto quien ha de aprender a ser responsable de ella y a mejorarla, por más que pueda contar con técnicas establecidas por psicólogos, entrenadores y demás profesionales del deporte (AU)

Análisis de los efectos de la concentración en el tiro libre en baloncesto / No disponible

El presente estudio intenta determinar hasta qué punto es importante la concentración en el tiro libre de baloncesto. La importancia de la concentración cobra aún mayor trascendencia por el hecho de que no puede ser manipulada externamente, es decir, que es el propio sujeto quien ha de aprender a ser responsable de ella y a mejorarla, por más que pueda contar con técnicas establecidas por psicólogos, entrenadores y demás profesionales del deporte (AU)

La iniciación y la motivación en el baloncesto: el papel del entrenador / No disponible

En el deporte o en una actividad de iniciación deportiva, en este caso el baloncesto, en la etapa de la Educación. Primaria, es necesaria la presencia del juego como elemento principal para desarrollar un correcto aprendizaje de las habilidades y perceptivo motriz. La especialización precoz es un aspecto negativo presente hoy en día en la iniciación deportiva. Hace referencia a la práctica deportiva concreta demasiado temprana. Lo que se debe buscar en la iniciación es conservar y mejorar la salud del niño a través de la actividad física, utilizando sus aptitudes, para lograr una mayor interacción entre el cuerpo y el entorno. Ésta, según González (1996) no es recomendable ya que puede producir algunos éxitos deportivos precoces pero se acompaña de una corta carrera deportiva, a veces con secuelas patológicas y alteraciones del desarrollo armónico por una actividad física que supera unos determinados límites de esfuerzo. Su utilización tiene diversos efectos negativos en el niño. Puede sentirse decepcionado y abandonar el deporte e, incluso, llegar a una frustración cuando se da cuenta de que no va a ser posible llegar a la cima. Es importante, por lo tanto, una formación deportiva completa del niño, para después del período iniciativo pasar a una especialización (AU)

Las categorías de formación en el baloncesto / No disponible

El baloncesto es un deporte que puede ser practicado por todo el mundo, desde niños hasta mayores, siempre que se reúnan unos requisitos mínimos de salud. Los jóvenes deben escoger el baloncesto por sí mismos, después de haber experimentado otros deportes o estar convencidos de que les gusta. Con jóvenes, lo más conveniente es enseñar un concepto claro en lugar de varios que quizá no sean bien retenidos por el destinatario. El entrenador no debe obligar nunca al niño a renunciar a otros placeres por el baloncesto, es el propio alumno quien encontrará placer al jugar a este deporte. Lo importante es que los chicos no se pierdan por el camino y evitar hacer selecciones prematuras. El gran contenido de este deporte es hacer que el niño o joven se sienta entretenido, se muestre espontáneo y sin inhibiciones mientras su cuerpo se fortalece y surgen lazos mutuos de simpatía y amistad con los compañeros. A continuación se van a mostrar las pautas que se han de seguir en un equipo de formación tanto por parte del entrenador como por parte de los padres para el buen funcionamiento de dicho equipo, para alcanzar los objetivos tanto deportivos, como de educación en valores (AU)

Origen de los ingresos en los clubes de baloncesto en las últimas décadas: evolución y tendencias futuras / No disponible

de los clubes de baloncesto han cambiado mucho en las últimas décadas. Las forma de obtener el dinero necesario para mantener un saldo positivo en la cuenta de pérdidas y ganancias cambian constantemente. Así, los medios tradicionales de obtención de dinero, aunque no han desaparecido por completo, han sido reemplazados por otros nuevos, y el futuro traerá sin duda algunos otros ahora desconocidos (AU)