Background Plasma cholesterol is one of the strongest risk factors associated with the development of atherosclerotic cardiovascular disease (ASCVD) and myocardial infarction. Human studies suggest that elevated plasma β-carotene is associated with reductions in circulating cholesterol and the risk of myocardial infarction. The molecular mechanisms underlying these observations are unknown. Objective The objective of this study was to determine the impact of dietary β-carotene and the activity of β-carotene oxygenase 1 (BCO1), which is the enzyme responsible for the conversion of β-carotene to vitamin A, on circulating cholesterol concentration. Methods In our preclinical study, we compared the effects of a 10-d intervention with a diet containing 50 mg/kg of β-carotene on plasma cholesterol in 5-wk-old male and female C57 Black 6 wild-type and congenic BCO1-deficient mice. In our clinical study, we aimed to determine whether 5 common small nucleotide polymorphisms located in the BCO1 locus affected serum cholesterol concentrations in a population of young Mexican adults from the Universities of San Luis Potosí and Illinois: A Multidisciplinary Investigation on Genetics, Obesity, and Social-Environment (UP AMIGOS) cohort. Results Upon β-carotene feeding, Bco1−/− mice accumulated >20-fold greater plasma β-carotene and had ∼30 mg/dL increased circulating total cholesterol (P < 0.01) and non–HDL cholesterol (P < 0.01) than wild-type congenic mice. Our results in the UP AMIGOS cohort show that the rs6564851 allele of BCO1, which has been linked to BCO1 enzymatic activity, was associated with a reduction in 10 mg/dL total cholesterol concentrations (P = 0.009) when adjusted for vitamin A and carotenoid intakes. Non–HDL-cholesterol concentration was also reduced by 10 mg/dL when the data were adjusted for vitamin A and total carotenoid intakes (P = 0.002), or vitamin A and β-carotene intakes (P = 0.002). Conclusions Overall, our results in mice and young adults show that BCO1 activity impacts circulating cholesterol concentration, linking vitamin A formation with the risk of developing ASCVD.
The biosorption of Co(II) on three fungal biomasses: Paecilomyces sp., Penicillium sp., and Aspergillus niger, was studied in this work. The fungal biomass of Paecilomyces sp. showed the best results, since it removes 93% at 24 h of incubation, while the biomasses of Penicillium sp. and Aspergillus niger are less efficient, since they remove the metal 77.5% and 70%, respectively, in the same time of incubation, with an optimum pH of removal for the three analyzed biomasses of 5.0 ± 0.2 at 28°C. Regarding the temperature of incubation, the most efficient biomass was that of Paecilomyces sp., since it removes 100%, at 50°C, while the biomasses of Penicillium sp. and Aspergillus niger remove 97.1% and 94.1%, at the same temperature, in 24 hours of incubation. On the contrary, if the concentration of the metal is increased, the removal capacity for the three analyzed biomasses decreases; if the concentration of the bioadsorbent is increased, the removal of the metal also increases. It was observed that, after 4 and 7 days of incubation, 100%, 100%, and 96.4% of Co(II) present in naturally contaminated water were removed, respectively.
El objetivo de este artículo es contextualizar el proceso de educación en Colombia y Pereira, entendiendo que lo ocurrido en la ciudad tiene muchas conexiones con la política nacional. En un primer apartado se ponderan algunas relaciones entre la educación y la modernización en la formación de la nación colombiana. Luego, en un segundo apartado, se revisa cómo los modelos y métodos educativos estuvieron conectados con los regímenes políticos y los grandes temas de preocupación durante el siglo XIX y la primera mitad del siglo XX. Y el tercero, presenta el caso de Pereira desde la información que ofrece la historiografía regional y local.
Prevalencia de la prediabetes y sus comorbilidades en la población pediátrica mexicanaPrevalence of prediabetes and its comorbidities in the Mexican pediatric population
Raising high‐density lipoprotein cholesterol (HDL‐C) via nutrition intervention is a challenge. Papaya fruit contains Carica papaya lipase, which may influence lipid metabolism. Our objective was to determine whether individuals consuming less papaya were at greater risk for low HDL‐C or other dyslipidemias. We focused on a subset of 339 Mexican college applicants (50.7% females) aged 18–25 years with complete data on a Mexican‐adapted Willett food frequency questionnaire and blood lipid profiles. Overall prevalence of low HDL‐C was 48.4%. Subjects were split into two consumption groups: <3 or >3 weekly papaya servings (mean intake 0.38 vs. 4.3 servings/week, P<0.0001). There were no differences in blood lipid profiles between the two groups; however, females who consumed less than 3 servings of papaya per week were at 1.52 times greater risk (95%CI: 0.99–2.32, P=0.05) of having low HDL‐C after adjustment for age and family history of cardiovascular disease and diabetes. These findings were not observed in males. We did not observe risk for other at‐risk blood lipid measures. Consumption of at least 3 servings of papaya per week may prevent low HDL‐C in female Mexican college applicants.Grant Funding Source: This study was sponsored by C09‐PIFI‐030606 (UASLP); UIUC Center for Health Aging and Disability grant; and USDA NIFA Hatch Projects.
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