Remodelamento de partículas lipoprotéicas de alta densidade (HDL) e atividade antioxidante entre pacientes diabéticos e não diabéticos com doença aterosclerótica coronária / Remodeling of high-density lipoprotein particles (HDL) and antioxidant activity between diabetic and non-diabetic patients with coronary artery disease

sendo a doença aterosclerótica a de maior morbimortalidade. Além disso, a aterosclerose pode manifestar-se precocemente dada a presença de dislipidemias, processos inflamatórios e alterações metabólicas como a diabetes. OBJETIVO: avaliar se existem diferenças no remodelamento da HDL e atividade antioxidante entre pacientes diabéticos e não diabéticos com doença aterosclerótica. Ainda, identificar, quantificar e estimar biomarcadores relacionados ao remodelamento de partículas lipoprotéicas e ao risco cardiovascular em função da concentração de colesterol na HDL, colesterol livre total,LDL-C, apoB, apoA-I, atividade da paraoxonase 1 (PON1), razões de risco como TG/HDL-C, LDL-C/ApoB, HDL-C/apoA-I, PON1/apoA-I, apoA-I/ApoB e tamanho estimado de partículas de HDL, LDL, glicemia, insulina e HbA1c. MÉTODOS: foram selecionados por conveniência 69 pacientes do sexo masculino, entre 18 e 75 anos,oriundos da enfermaria de cardiologia do Hospital Ana Neri, subdivididos em dois subgrupos: diabéticos e não diabéticos, ambos, com doença aterosclerótica coronária.Foram utilizadas metodologias enzimáticas, imunoturbidimétricas e nefelometricas nesse estudo. RESULTADOS: dos achados da comparação direta entre os grupos apenas a glicemia de jejum foi significativamente diferente (Teste t; p<0,05). Embora não significante o valor do colesterol não esterificado (CL) foi, em média, quatro vezes maior nos diabéticos quando comparado aos não diabéticos. A análise de correlação linear mostrou achados importantes do ponto de vista fisiológico, como correlação positiva entre CL e HDL-C (r=0,617; p<0,01083) e razão apoA-I/apoB e insulina (r=0,489; p<0,02095) nos diabéticos, e correlação negativa entre PON1/apoA-I com CL (r=-0,499; p<0,0065) e HDL-C com HbA1c (r=-0,444; p<0,0324) nos pacientes não diabéticos. CONCLUSÃO: Os achados desse estudo mostram que o cálculo das razões utilizadas para a análise de risco cardiovascular foram importantes indicadores quando correlacionados com marcadores séricos sugestivos de risco cardiovascular na população masculina diabética deste estudo.

Introduction: cardiovascular diseases affect thousands of people around the world, and atherosclerotic disease is the one with the greatest morbidity and mortality. Furthermore, atherosclerosis may manifest early by the presence of dyslipidemia, inflammatory processes and metabolic disorders such as diabetes. Objective: to assess whether there are differences between HDL remodeling and antioxidant activity from diabetic and nondiabetic patients with coronary artery disease. Also, identify, quantify and evaluate biomarkers related to lipoprotein particles remodeling and cardiovascular risk depending on HDL cholesterol concentration, total free cholesterol, LDL-C, apoB, apoA-I, paraoxonase activity 1 (PON1), and risk ratios like TG/HDL-C, LDL-C/ApoB, HDLC/apoA-I, PON1/apoA-I, apoA-I/ApoB, HDL and LDL estimated particles size, glucose, insulin and HbA1c. Methods: we selected by convenience 69 male patients between 18 and 75 years, from the Cardiology Unit of Hospital Ana Neri, they were subdivided into two groups: diabetic and non-diabetic patients, both with coronary atherosclerosis. In these study were used enzymatic, immunoturbidimetric and nephelometric methodologies. Results: From the findings of the direct comparison between groups only fasting glucose was significantly different (t test; p <0.05). Although not significant, the value of non-esterified cholesterol (CL) was on average, four times higher in diabetics when compared to non-diabetics. Linear correlation analysis showed significant findings, from a physiological point of view, as positive correlation between CL and HDL-C (r = 0.617, p <0.01083) and apoA-I ratio/apoB and insulin (r = 0.489, p <0.02095) in diabetics, and negative correlation between PON1/apoA-I with CL (r = -0.499; p <0.0065) and HDL-C with HbA1c (r = -0.444; p <0.0324) in patients non-diabetic. Conclusion: the findings shows that the calculated ratio´s used for cardiovascular risk analysis were important indicators when correlated to serum markers suggestive of cardiovascular risk in the study diabetic male population.

Factores de riesgo aterogénico en una población de adultos mayores / Atherogenic risk factors in an elderly population

La aterosclerosis constituye la primera causa de muerte y también de morbilidad en ingresos hospitalarios en el ámbito mundial donde las infecciones no ocupan este lugar tan preponderante. En Cuba, sus más frecuentes y dañinas consecuencias orgánicas constituyen también la primera causa de muerte. Se realizó una investigación descriptiva en 108 adultos mayores de un total de 427 pacientes de ambos sexos durante el año 2003 para identificar factores de riesgo aterogénicos. Se utilizó el modelo de recolección del dato primario para obtener información sobre la edad, peso al nacer, antecedentes patológicos personales y familiares, consumo de cigarrillos, tensión arterial sistólica y diastólica, concentración del colesterol del suero y de su fracción de alta densidad y el grado de actividad física. Se encontró que el 26,9 por ciento de la muestra eran fumadores activos, el 33,3 por ciento tenían sobrepeso, el 15,7 eran obesos, el 81,4, hipertensos y de ellos el 50 por ciento eran pacientes nuevos. Un alto porcentaje no practicaba ejercicios físicos. Se apreció que 78 pacientes tenían hipercolesterolemia y en 46, la concentración de la lipoproteína de alta densidad estaba disminuida. En la población de adultos mayores estudiada se identificaron, en porcentajes apreciables, factores de riesgo aterogénicos que pueden ser modificados en aras de tener una mejor salud y calidad de vida(AU)

The aterosclerosis constitutes the first cause of death and also of morbilidad in hospital revenues in the world environment where the infections don't occupy this place so preponderant. In Cuba, their most frequent and harmful organic consequences also constitute the first cause of death. He/she was carried out a descriptive investigation in 108 adults bigger than a total of 427 patients of both sexes during the year 2003 to identify factors of risk aterogénicos. The pattern of gathering of the primary fact was used to obtain information on the age, weight when being born, personal and family pathological antecedents, consumption of cigarettes, systolic arterial tension and diastólica, concentration of the cholesterol of the serum and of its fraction of high density and the degree of physical activity. It was found that 26,9 percent of the sample was smoking active, 33,3 percent had overweight, the 15,7 were obese, the 81,4, hipertensos and of them 50 percent was patient new. A high percentage didn't practice physical exercises. It was appreciated that 78 patients had hipercolesterolemia and in 46, the concentration of the lipoproteína of high density was diminished. In the studied bigger population of adults they were identified, in appreciable percentages, factors of risk aterogénicos that can be modified for the sake of having a better health and quality of life(AU)

Efecto antioxidante del tomate (lycopersicum esculentum mill) en la lipoproteína de alta densidad (HDL) y en los microsomas hepático de la rata / Effects antioxidantion of the tomato (lycopersicum esculentum mill) in the lipoprotein of high density (HDL) and in the microsome hepatic of the rat

Para evaluar el efecto antioxidante del tomate, se suministró dietas suplementarias con extracto de tomate al 0 por cieto (I), 5 por ciento (II) ó 10 por ciento (III) a tres grupos de ratas machos durante 9 semanas, luego se extrajo la sangre por punción cardíaca. Los microsomas hepáticos y la lipoproteína HDL fueron obtenidos por ultracentrifugación preparativa y la composición de ácidos grasos se analizó por cromatografía en fase gas-líquida. Ambas muestras fueron sometidas a oxidación con Fe²+/ascorbato y se determinó la cantidad de malondihaldeído/mg proteínas. La ingesta de tomate disminuyó la susceptibilidad a la oxidación de los microsomas hepáticos y de la HDL, además, el contenido de ácidos grasos de la serie n-3 fue mayor en el grupo de la dieta (p<0,05), lo cual no se observó para los AG n-6. En conclusión, el consumo de tomate en la rata disminuye la susceptibilidad a la oxidación de microsomas hepáticos y de la HDL