A CROSS-SECTIONAL STUDY OF THE ASSOCIATION BETWEEN THE 1-HOUR ORAL GLUCOSE TOLERANCE TEST AND THE METABOLIC SYNDROME IN A HIGH-RISK SAMPLE WITH IMPAIRED FASTING GLUCOSE.

Objective: The aim of this study was to evaluate the association between the 1-hour oral glucose tolerance test (OGTT) (≥155 mg/dL) and metabolic syndrome (MS) in a sample with previous impaired fasting glucose (IFG). Methods: Three hundred and twenty four Peruvian subjects with a history of IFG ≥100 mg/dL were selected for a cross-sectional study. They underwent a 75 g OGTT and were assigned to different groups according to the result. We evaluated the association between 1-hour OGTT and MS. Results: The mean age was 56.5 ± 12.6 years and 191 (61.5%) were female. During the OGTT, we found 28 (8.6%) subjects with diabetes, 74 (22.8%) with IGT, and 222 (68.5%) with a normal glucose tolerance test with a 2-hour glucose <140 mg/dL (NGT). In the NGT group, 124 (38.3%) had 1-hour glucose levels <155 mg/dL, while 98 (30.2%) had 1-hour glucose levels ≥155 mg/dL. Evaluating the association between the 1-hour value in the OGTT and MS, we found that subjects with a 1-hour glucose ≥155 mg/dL were more than twice as likely to have MS as those with a 1-hour glucose <155 mg/dL (odds ratio = 2.64, 95% confidence interval: 1.52 to 4.57). In addition, body mass index, fasting glycemia, triglycerides, and waist circumferences were significantly higher in subjects with 1-hour glucose levels ≥155 mg/dL compared to those with 1-hour glucose levels <155 mg/dL (P<.05). Conclusion: Among subjects with IFG, performing an OGTT was helpful to identify subjects with 1-hour glucose levels ≥155 mg/dL and NGT who were significantly more likely to have MS and a worse cardiometabolic risk profile. Abbreviations: AST = aspartate aminotransferase; BMI = body mass index; CI = confidence interval; IFG = impaired fasting glucose; IGT = impaired glucose tolerance; LDL = low-density lipoprotein; MS = metabolic syndrome; NGT = normal glucose tolerance; OGTT = oral glucose tolerance test; OR = odds ratio; T2DM = type 2 diabetes; TG = triglycerides.

Grado de oxidación en pacientes con Diabetes Mellitus Tipo 2 / Oxidation degree in patients with Type 2 Diabetes Mellitus

La peroxidación lipídica es un proceso complejo que hace referencia a la degradación oxidativa de los lípidos, a través del cual los radicales libres capturan electrones de los lípidos en las membranas celulares, lo cual compromete la integridad y la función de la membrana. Mediante una serie de reacciones en cadena, se forman los peróxidos lipídicos que se degradan para formar compuestos reactivos como el malondialdehído (MDA) y 4-hidroxinonenal, los cuáles pueden ser cuantificados por diferentes metodologías. Objetivo: El presente trabajo se realizó con la finalidad establecer el grado de oxidación en una población con diabetes tipo 2 (DM2).Métodos: Estudio descriptivo, analítico y transversal; muestra de 55 personas, conformada por 30 controles entre 25-35 años y 25 pacientes con DM2 entre 25-50 años, se les determinó glicemia, triglicéridos, colesterol total, HDL-Colesterol y LDL-Colesterol por método colorimétrico enzimático, así como se determinó la concentración de 4-hidroxinonenal como un marcador de estrés oxidativo Resultados: Los valores de 4-hidroxinonenal en la población control oscilaron entre 2,61y 6,83 µmol/L y en los diabéticos de 28,99 y 73,74 µmol/L., encontrándose diferencias estadísticamente significativas entre ambas poblaciones, así como en el perfil lipídico y en la glicemia entre ambos grupos. Conclusión: Los resultados demuestran una elevación de la peroxidación lipídica en pacientes diabéticos, lo cual es indicativo de estrés oxidativo y riesgo adicional en estos pacientes que podrían conllevar a las complicaciones crónicas dela diabetes tipo 2(AU)

Lipid peroxidation is a complexprocess that refers to the oxidative degradation of lipids, through which free radicals capture electrons from lipids incell membranes, which compromises the integrity and functionof the membrane. Trough a series of chain reactions, lipidperoxides are formed that degrade to form reactive compoundssuch as malondialdehyde (MDA) and 4-hydroxynonenal, whichcan be quantified by different methodologies. Objective: The present work was carried out with the purpose ofestablishing the degree of oxidation in a population withtype 2 diabetes (DM2). Methods: the sample was 55 people,made up of 30 controls between 25-35 years and 25 patientswith DM2 and between 25-50 years, glycemia, triglycerides,total cholesterol, HDL-Cholesterol and LDL-Cholesterol were etermined by colorimetric method. enzymatic, as well as theconcentration of 4-hydroxynonenal was determined as a markerof oxidative stress. Results: The values of 4-hydroxynonenal inthe control population ranged between 2.61 and 6.83 µmol/Land in diabetics 28.99 and 73.74 µmol/L., finding statisticallysignificant differences between both populations, as well as inthe lipid profile and glycemia between both groups. Conclusion:The results show an elevation of lipid peroxidation in diabeticpatients, which is indicative of oxidative stress and additionalrisk in these patients that could lead to chronic complications oftype 2 diabetes(AU)