RB1 is the gene responsible for retinoblastoma, the most common malignant intraocular tumor of infancy and early childhood. There are no reports about this gene in Ecuadorian populations, and only a few studies have been published in Latin America about this subject. There is a spectrum of more than 370 mutations described in the RB1 gene mutation database (http://www.d-lohmann.de/ Rb/mutations.html), and alterations have been found in 25 of the 27 exons. During the exon-by-exon analysis of 31 tumor and blood samples from Ecuadorian patients, we found two new mutations and three novel polymorphisms. One of the polymorphisms is located in intron 26 where no alterations of the gene have been described previously. The polymorphisms were found in all of the patientsÕ tumor samples, but not in normal population, suggesting there might be a relationship between these polymorphisms and the development of retinoblastoma in the Ecuadorian population.
Diferentes autores han demostrado la asociación existente entre la exposición a ciertos factores de riesgo y el incremento en los costos de los tratamientos farmacológicos de las enfermedades cardiovasculares. El presente trabajo es un estudio retrospectivo y analítico de los costos de medicamentos prescriptos a pacientes internados en el Servicio de Unidad Coronaria del Hospital Interzonal Dr. José Penna de la Ciudad de Bahía Blanca (Argentina) en el periodo marzo de 2008 a mayo de 2010. Se analiza la variación de los costos medios diarios de los tratamientos farmacológicos provistos a pacientes con cardiopatía isquémica según la exposición (o no) al hábito tabáquico. Se observó que los pacientes con cardiopatía isquémica y hábito tabáquico enfrentan un mayor costo directo asociado a mayores costos en los tratamientos farmacológicos, que quienes no han estado expuestos al tabaquismo. Al mismo tiempo, los costos estimados para cada grupo de pacientes muestran variabilidad según se estimen a precios máximos o mínimos, resultado de la gran dispersión de precios observada en el mercado farmacéutico.
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