Level of Auto Antibody Against Oxidized LDL in Myocardial Infracted Patients.

The aim of this study was to evaluate the level of auto antibody against oxidized LDL in myocardial infracted (MI) patients and normal healthy subjects of West Bengal (India) and to establish it to be also a cofactor for MI. Patients and Methodology : This study was carried out on 285 patients with MI as well as 75 healthy volunteers of comparable age and gender as control group. Blood was collected immediately after admission of the patients. Auto antibody against oxidized LDL, Nitric Oxide and malondialdehyde (MDA) were measured in all groups. Results : Mean serum level of auto antibody against oxidized LDL, MDA, total Cholesterol and LDL Cholesterol levels (118 ± 9.0, 7.4 ± 1.3, 233 ± 30, and 145 ± 38) were significantly (p<0.05) higher in MI patients when compared with control subject. The mean serum levels of nitric oxide (NO) and HDL, cholesterol were significantly (p<0.05) lower as compared to control group. Conclusion : Significantly high level of auto antibody against oxidized LDL associated with high level of MDA, total cholesterol and decreased level of NO and HDL cholesterol appear to be the factors responsible for the increase risk of coronary artery disease i.e., myocardial infarction in the population of West Bengal, India.

Los jugos de cítricos inhiben la oxidación de lipoproteínas de baja densidad: relación entre actividad captadora de radicales libres y movilidad electroforética / Citrus juice inhibits low density lipoprotein oxidation: relationship between free radical scavenger activity and electrophoretic mobility

Epidemiological studies have shown that consumption of fruits and vegetables are associated with beneficial effects on human health including the reduction of coronary artery disease (CAD) risk. Fruits and their juices contain phytochemicals that inhibit in vitro the low-density lipoprotein (LDL) oxidation, a key process involved in the generation of arterial lessions. We developed an study to examine the phenolics compound content of citrus juice cultivated in the southwest of Antioquia, Colombia, its free radical scavenger activity and in vitro effect on LDL oxidation. Five citrus varieties were analyzed: Citrus sinensis valencia, Citrus reticulata clementina, Citrus reticulata oneco, Tangelo Orlando and Tangelo mineola. The results showed that no correlation exists between phenolic compounds content and free radical scavenger activity in the citrus juices analyzed. However a high inhibitory capacity of LDL oxidation was found.

Estudios epidemiológicos han demostrado que el consumo de frutas y vegetales se asocia con efectos beneficiosos sobre la salud humana, incluyendo reducción del riesgo de enfermedades cardiovasculares (ECV). Las frutas y sus jugos contienen compuestos que inhiben la oxidación de Lipoproteínas de Baja Densidad (LDL), un proceso clave en el desarrollo de la lesión arterial. Se ha desarrollado un estudio para determinar el contenido de compuestos fenólicos, la actividad captadora de radicales libres y el efecto sobre la oxidación de LDL, de jugos de cítricos cultivados en el suroeste de Antioquia (Colombia). Cinco variedades de cítricos fueron analizadas: Citrus sinensis valencia, Citrus reticulata clementina, Citrus reticulata oneco, Tangelo orlando, Tangelo mineola. Se demostró que en estos jugos no existe correlación entre el contenido de compuestos fenólicos y la actividad captadora de radicales libres (ACRL), sin embargo, se encontró una alta capacidad para inhibir la oxidación de LDL.

Evaluation of autoantibody against modified LDL levels in patients with cardioovascular diseases

Atherosclrosis is a process that initiated with hypercholestrolemia and fatty streak formation. Previous studies showed oxidative modification of LDL render immunogenic and autoantibodies to epitopes of oxidized LDL. Oxidized LDL [OX-LDL], has antigenic properties. Antibodies against oxidized LDL have been proposed to be independent predictors of atherosclerosis development. The main aims of the current study were to compare antibody titers to different types of oxidized LDL [Cu+2-LDL, Malondialdehyde-LDL] and Native-LDL between angiographically documented coronary patients, non-documented patients and healthy subjects. Correlation between autoantibodies against oxidized LDL and increased risks of cardiovascular diseases has been shown. As a case-control study, we evaluated angiographically documented coronary patients, non-documented patients and healthy subjects to measure anti-OX-LDL autoantibody levels. Enzyme-linked immunosorbent assay was used to measure anti-OX-LDL autoantibodies. ANOVA test used for statistical analysis. Titers of anti-Malondialdehydo-LDL autoantibodies were 3.55 +/- 0.415, 0.361 +/- 0.20, 0.093 +/- 0.078 respectively in each group [P<0.005]. There was not statistically meaningful difference, between native-LDL and Cu+2-LDL antibodies. It seems the titre of autoantibodies against OX-LDL considered as a predictor of progression of atherosclerosis. Our data provide further support for a role of oxidatively modified LDL in atherogenesis