Consumo episódico excesivo de alcohol en adolescentes: su asociación con los estados de ánimo negativos y los factores familiares

Fundamentos: El consumo episódico excesivo de alcohol (CEEA) es una práctica extendida en la población adolescente con graves riesgos para la salud, incluyendo el abuso/dependencia en la edad adulta. El objetivo de este artículo es analizar su asociación con los estados de ánimo negativos y algunas variables familiares entre los adolescentes catalanes. Métodos: Estudio transversal de una muestra representativa de adolescentes (edad 14-18 años) de Cataluña (Segunda oleada del Panel de Familias e Infancia) (2006-2010). Se realizan modelos de regresión logística para mujeres (n = 1.459) y hombres (n= 1.105) para estimar si los estados de ánimo negativos auto-percibidos (tristeza, presión parental, etc.) están asociados con el CEEA, capturado como haberse emborrachado por lo menos dos veces al mes durante el último año. Se estima en qué medida esos efectos son atribuibles a algunos factores familiares. Resultados: El sentimiento crónico de tristeza está asociado con el CEEA entre los varones (OR 2,7), al igual que sentirse presionado/a por los progenitores en ambos sexos (OR 1,8 hombres y OR 2,1 mujeres). Las mujeres de rentas medio-bajas y altas son más proclives al CEEA (OR 1,6 y OR 1,7 respectivamente). La existencia de progenitores de origen inmigrante (OR 0,4) y la fijación parental de un horario de retorno a casa los fines de semana (OR 0,6) presentan una asociación negativa con el CEEA entre las mujeres. Conclusiones: Los estados de ánimo negativos (EAN) están asociados al CEEA. Los efectos de los factores socio-económicos y familiares sobre el CEEA son más relevantes en mujeres que en varones.

Wine, alcohol, polyphenols and cardiovascular disease

Abstract. Excessive alcohol consumption is associated with increased morbidity and mortality as well as with labour and traffic accidents. However, current evidence suggests beneficial effects of moderate drinking on cardiovascular events including coronary heart disease, ischaemic stroke, peripheral arterial disease and congestive heart failure. The underlying mechanisms to explain these protective effects against coronary heart disease include an increase in high-density lipoprotein cholesterol and an increase in insulin sensitivity, and a decrease in platelet aggregation and circulating concentrations of fibrinogen. However, there are discrepancies regarding the specific effects of different types of beverages on the cardiovascular system, and also whether the possible protective effects of alcoholic beverages are due to their alcohol component (ethanol) or non-alcoholic products containing, mainly polyphenols. Recent randomised clinical trials have shown that wine, a polyphenol-rich alcoholic beverage, provides higher antioxidant and anti-inflammatory effects than some spirits such as gin, a polyphenol-free alcoholic beverage. In addition, dealcoholized red wine decreases blood pressure through a nitric oxide mediated mechanism, suggesting a protective effect of polyphenols on vascular function. Other studies performed in women have observed that daily doses of 1520 g of alcohol as red wine are sufficient to elicit protective effects similar to those observed in men who consumed higher doses of wine. In conclusion, moderate consumption of wine exerts a protective effect on biomarkers related to the progression and development of atherosclerosis due to its alcoholic (ethanol) and non-alcoholic (polyphenols) content. Women are more sensitive to the beneficial effects of wine.

Efectos del alcohol y conducción de vehículos: creencias y conductas de los jóvenes

Traffic accidents are one of the causes of death for people between 1 and 45 years old. Many studies verify that the road accidents are related with the consumption of alcohol. This problem, is especially important in the young people and it is increased during dawns of the weekends. Some studies underline the lack of information and knowledge of many young people concerning law on alcohol consummation when driving and the effects of this drug on consumers. Another problem is the amount of mistaken beliefs on what to do neutralize the alcohol’s effect before drive. The objective of our study is to evaluate, in university students, the knowledge of the rules of driving behavior included in the circulation code and the personal beliefs about the effects of the alcohol in driving, and to find the frequency and the circumstances in which young people drive after alcohol consummation. The results suggest many actions that may be considered in the design of preventive campaigns that promotes safety road behavior in order to increase their effectivity

Counteracting incentive sensitization in severe alcohol dependence using deep brain stimulation of the nucleus accumbens: clinical and basic science aspects

The ventral striatum / nucleus accumbens has been implicated in the craving for drugs and alcohol which is a major reason for relapse of addicted people. Craving might be induced by drug-related cues. This suggests that disruption of craving-related neural activity in the nucleus accumbens may significantly reduce craving in alcohol-dependent patients. Here we report on preliminary clinical and neurophysiological evidence in three male patients who were treated with high frequency deep brain stimulation of the nucleus accumbens bilaterally. All three had been alcohol dependent for many years, unable to abstain from drinking, and had experienced repeated relapses prior to the stimulation. After the operation, craving was greatly reduced and all three patients were able to abstain from drinking for extended periods of time. Immediately after the operation but prior to connection of the stimulation electrodes to the stimulator, local field potentials were obtained from the externalized cables in two patients while they performed cognitive tasks addressing action monitoring and incentive salience of drug related cues. LFPs in the action monitoring task provided further evidence for a role of the nucleus accumbens in goal-directed behaviors. Importantly, alcohol related cue stimuli in the incentive salience task modulated LFPs even though these cues were presented outside of the attentional focus. This implies that cue-related craving involves the nucleus accumbens and is highly automatic.

Seguimiento de dependientes del alcohol y/o de la cocaina despues de su salida de una Comunidad Terapeutica: estudio piloto

Introducción Los avances en farmacoterapia del alcoholismo podrían propiciar un cambio de paradigma, basado en los nuevos programas de reducción del consumo de alcohol. Material y Método Este estudio revisa los fundamentos neurobiológicos y farmacoterapéuticos del alcoholismo, centrándose en los antagonistas opioides, el tratamiento orientado a la abstinencia y el orientado hacia la reducción del consumo de alcohol. Resultados 1. Los programas de tratamiento de la dependencia del alcohol presentan sólo una eficacia pequeña o moderada. 2. Los pacientes presentan una elevada motivación para reducir el consumo de alcohol pero una baja motivación para abandonar de manera continuada al consumo de alcohol. 3. El programa de reducción continuada del consumo de alcohol, asociado a un tratamiento intermitente con naltrexona, puede ser de utilidad en los pacientes con una baja gravedad de la dependencia del alcohol. Discusión Aunque los pacientes que presentan una grave dependencia del alcohol deberían ser tratados en programas orientados hacia la abstención continuada, los que presentan una baja gravedad pueden beneficiarse de los programas de reducción del consumo de alcohol, los cuales pueden conseguir a corto plazo una reducción el número de consumiciones por día de consumo y, a largo plazo, incluso una progresiva reducción de la"obsesión" por beber, la conducta de búsqueda de alcohol y los trastornos médicos, conductuales y sociales, causados por el consumo excesivo de alcohol. Para poder llevar a cabo este cambio de paradigma en el tratamiento del alcoholismo, se requieren futuros ensayos clínicos controlados para evaluar su eficacia y su tolerabilidad.

Micro- and nanostructuring of poly(ethylene-2,6-naphthalate) surfaces, for biomedical applications, using polymer replication techniques

Here we investigate the formation of superficial micro- and nanostructures in poly(ethylene-2,6-naphthalate) (PEN), with a view to their use in biomedical device applications, and compare its performance with a polymer commonly used for the fabrication of these devices, poly(methyl methacrylate) (PMMA). The PEN is found to replicate both micro- and nanostructures in its surface, albeit requiring more forceful replication conditions than PMMA, producing a slight increase in surface hydrophilicity. This ability to form micro/nanostructures, allied to biocompatibility and good optical transparency, suggests that PEN could be a useful material for production of, or for incorporation into, transparent devices for biomedical applications. Such devices will be able to be autoclaved, due to the polymer's high temperature stability, and will be useful for applications where forceful experimental conditions are required, due to a superior chemical resistance over PMMA.