Examinando por Materia "Epigenetic"

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  • Publicación
    Acceso abierto
    Are nutrition-induced epigenetic changes the link between socioeconomic pathology and cardiovascular diseases?
    (2008-07) Lopez-Jaramillo, Patricio; Silva, Sandra Y.; Rodríguez Salamanca, Narella; Durán Hernández, Álvaro-Hernán; Mosquera, Walter; Castillo, Victor R.
    The prevalence of cardiovascular diseases (CVD) and diabetes mellitus type 2 (DM 2) is decreasing in developed countries despite the increase in the percentage of subjects with obesity and other wellrecognized cardiovascular risk factors. In contrast, the recent transition of the economic model experienced by developing countries, characterized by the adoption of a Western lifestyle, that we have named ‘‘socioeconomic pathology,’’ has led to an increase in the burden of CVD. It has been demonstrated that conventional cardiovascular risk factors in developed and developing countries are the same. Why then does the population of developing countries currently have a higher incidence of CVD than that of developed countries if they share the same risk factors? We have proposed the existence of a higher susceptibility to the development of systemic inflammation at low levels of abdominal obesity in the population of developing countries and the consequent endothelial dysfunction, insulin resistance, DM 2, and CVD. In contrast, an important percentage of obese people living in developed countries have a healthy phenotype and low risk of developing CVD and DM 2. Human epidemiologic studies and experimental dietary interventions in animal models have provided considerable evidence to suggest that nutritional imbalance and metabolic disturbances early in life may later have a persistent effect on an adult’s health that may even be transmitted to the next generations. Epigenetic changes dependent on nutrition could be key in this evolutionary health behavior, acting as a buffering system, permitting the adaptation to environmental conditions by silencing or increasing the expression of certain genes.
  • Publicación
    Acceso abierto
    Combatir la epidemia de diabetes mellitus tipo 2 en Latinoamérica : características especiales que demandan acciones innovadoras
    (2011-03) Lopez-Jaramillo, Patricio; Rey, Juan José; Gómez Arbeláez, Diego; Rodríguez, Yudy A.; López López, Jose
    Latin American countries have an accelerated growth in the prevalence of type 2 diabetes mellitus (DM2) associated with increased rates of obesity and overweight. This increase is due to the rapid urbanization experienced in recent years, which has led to changes in physical activity and dietary habits. In addition, the fetal programming of malnourished mothers during pregnancy increases the tendency of children with low birth weight to develop insulin resistance and low-grade inflammation. This is especially so when these children are subjected to an environment of excess food to which they were not programmed, leading them to develop abdominal obesity and an increased risk of DM2. This article reviews some of the factors that may be associated with the DM2 epidemic in Latin America. These factors are basically caused by the contradiction between the need of the fetus to adapt to poor maternal nutrition or placental insufficiency due to diseases such as preeclampsia, and the need of the adult to adapt to the urban lifestyle full of excess food with a high intake of saturated fats, flours and sweetened beverages, as well as a sedentary lifestyle, which lead to insulin resistance and DM2. A full understanding of these conditions is essential to combat the DM2 epidemic in Latin America, as well as acceptance that effective prevention of DM2 requires a concerted effort by all of the actors in society, not just health teams.