RESUMENObjetivo: La paraoxonasa 1 (PON1), una esterasa asociada a las lipoproteínas de alta densidad (HDL), presenta diversos polimorfismos: el polimorfismo PON1 Q192R (región codificante) es el responsable de las variaciones de la actividad paraoxonasa de la enzima. El alelo PON1 192R es considerado un factor de riesgo para desarrollar trastornos cardiometabólicos en algunas poblaciones. El objetivo del presente estudio es determinar la distribución de los polimorfismos PON1 Q192R, y su asociación con el perfil lipidíco y APO A1 en una población andina. Materiales y métodos: Estudio descriptivo, transversal, en el que participaron 79 personas adultas (26 hombres y 53 mujeres), clínicamente sanas, residentes del distrito de Junín a 4105 msnm. Se empleó la técnica PCR/RFLP para el análisis del sitio polimórfico Q192R del gen PON1, y se determinaron los valores séricos del perfil lipídico y APO A1, y las actividades paraoxonasa y arilesterasa de la enzima. Resultados: La distribución de los genotipos para PON1192 fue: QQ 13,9%, QR 45,6% y RR 40,5%, y el alelo más frecuente fue 192R 63%. Las actividades paraoxonasa basal y estimulada fueron diferentes según sus genotipos, mientras que la actividad esterasa de la enzima no estuvo influenciada por el polimorfismo. Por otra parte, no se encontró asociación entre el polimorfismo PON1 Q192R y el perfil lipídico y APO A1. Conclusiones: La alta prevalencia del alelo PON1 192R en la población estudiada probablemente indique un papel importante en el desarrollo de enfermedades cardiometabólica.Palabras clave: Paraoxonasa; polimorfismo; factores de riesgo cardiovascular; altitud. Distribution of the Q192R polymorphism of the paraoxonase 1 gene in a population of the district of Junín (Junín region, Peru)ABSTRACT Objective: Paraoxonase 1 (PON1), an esterase associated with high-density lipoproteins (HDL), has several polymorphisms: the PON1 Q192R polymorphism (coding region) is responsible for variations in the paraoxonase activity of the enzyme. The PON1 192R allele is considered a risk factor for developing cardiometabolic disorders in some populations. The aim of the present study is to determine the distribution of the PON1 Q192R polymorphism and its association with the lipid profile and APO A1 in an Andean population. Materials and methods: A descriptive, cross-sectional study involving 79 healthy adults (26 males and 53 females), residents of the district of Junín at 4105 m.a.s.l. The PCR/RFLP technique was used for the analysis of the PON1 Q192R polymorphism. The serum values of the lipid profile and APO A1, and the paraoxonase and arylesterase activities of the enzyme were determined. Results: The distribution of the genotypes for PON1192 was QQ 13.9%, QR 45.6% and RR 40.5%, and the most frequent allele was 192R 63%. The baseline and stimulated paraoxonase activities were different based on their genotypes, while the esterase activity of the enzyme was not influenced by the polymorphism. On the other hand, no association was found between the PON1 Q192R polymorphism ...
RESUMENObjetivo: Determinar los niveles séricos de sCD36, molécula relacionada al metabolismo lipídico, en poblaciones de la altura y del nivel del mar, y establecer la asociación de este parámetro con factores de riesgo cardiometabólico. Materiales y métodos: Participaron 45 personas de Carhuamayo (4100 msnm) y 40 personas de Mala (30 msnm). Se midió el peso, talla y presión arterial. Se determinó la hemoglobina en sangre total, y la glucosa, perfil lipídico y sCD36 en suero. Resultados: Se encontró en la población de Carhuamayo niveles de hemoglobina significativamente mayores, mientras que el peso, IMC y nivel de glucosa fueron significativamente menores que en Mala. No hubo diferencia significativa entre los niveles séricos de sCD36 de ambas poblaciones. Se observó una diferencia significativa entre los valores medios de sCD36 según el IMC, y una correlación positiva significativa entre sCD36 y el peso e IMC. Conclusiones: El nivel sérico observado de sCD36 es independiente de la altitud y puede ser considerado como marcador potencial de síndrome metabólico.Palabras clave: sCD36; factor de riesgo cardiometabólico; obesidad; altitud (Fuente: DeCS BIREME). Serum levels of sCD36 and cardiometabolic variables in two Peruvian towns: Carhuamayo (4100 masl) and Mala (30 masl)ABSTRACT Objectives: To determine the serum levels of sCD36, a lipid metabolism-related molecule, in high-altitude and sea-level populations, and to establish the association of this parameter with cardiometabolic risk factors. Materials and methods:The study population consisted of 45 people from Carhuamayo (4100 masl) and 40 people from Mala (30 masl). Weight, height and blood pressure were measured. Hemoglobin was determined in whole blood, and glucose, lipid profile and sCD36 in serum. Results: It has been found that hemoglobin levels in the population of Carhuamayo were significantly higher, while weight, BMI and glucose level were significantly lower than those in the population of Mala. There was no significant difference between serum levels of sCD36 in both populations. A significant difference was observed between sCD36 mean serum levels of both populations based on the BMI, and a significant positive correlation between sCD36 and the weight and BMI. Conclusions: The observed sCD36 serum level is not related to the altitude and can be considered as a potential marker of metabolic syndrome.
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