High Levels of Iron Status and Oxidative Stress in Patients with Metabolic Syndrome

• Published in: Biological trace element research Vol. 151; no. 1; pp. 1 - 8
• Main Authors: Leiva, Elba, Mujica, Verónica, Sepúlveda, Pablo, Guzmán, Luis, Núñez, Sergio, Orrego, Roxana, Palomo, Iván, Andrews, Mónica, Arredondo, Miguel A
• Format: Journal Article
• Language: English
• Published: New York Springer-Verlag 2013; Humana Press Inc; Springer Nature B.V
• Subjects: adults; Aged; Biochemistry; Biomedical and Life Sciences; Biotechnology; blood; Blood Glucose - metabolism; Body Mass Index; Cardiovascular diseases; diabetes; fasting; Fasting - blood; Female; ferritin; Ferritins - blood; glucose; Heme Oxygenase (Decyclizing) - blood; Heme Oxygenase (Decyclizing) - metabolism; Humans; Insulin; Insulin - blood; insulin resistance; Insulin Resistance - physiology; Iron; Iron - blood; Life Sciences; Lipids - blood; Lipoproteins, LDL - blood; Logistic Models; low density lipoprotein; Male; Metabolic disorders; Metabolic syndrome; Metabolic Syndrome - blood; Metabolic Syndrome - physiopathology; Middle Aged; Nutrition; nutritional status; Oncology; oxidation; Oxidative stress; Oxidative Stress - physiology; patients; regression analysis; risk; Risk Factors; Thiobarbituric Acid Reactive Substances - analysis; thiobarbituric acid-reactive substances; transferrin; triacylglycerols; waist circumference; oxLDL; Oxidative stress; Iron; TBARS; Metabolic syndrome; Insulin
• ISSN: 0163-4984; 1559-0720
• DOI: 10.1007/s12011-012-9525-3

Studies concerning oxidative stress (OxE) parameters have increased, mainly because of its important role in cardiovascular diseases and diabetes complications. The main objective of this study was to evaluate iron nutrition status and oxidative stress parameters in subjects that had developed metabolic syndrome (MetS). Subjects from the Research Program of Risk Factors for Cardiovascular Disease (n = 155) were studied (ages ranging from 45 to 65 years old) and classified according to the Adult Treatment Panel III criterion. A blood sample was taken after a 12-h fasting period, and basal glucose, insulin, thiobarbituric acid reactive substances (TBARS), oxidized LDL (oxLDL), heme oxygenase (HO) activity, lipid profile, and iron nutrition status were determined. Eighty-five subjects were classified as MetS, and 70 non-MetS. Individuals with MetS showed higher Fe storage (high levels of ferritin, total body iron and low transferrin receptor), oxLDL, TBARS, and homeostatic model assessment for insulin resistance levels. The MetS group showed high levels of oxidative stress parameters (HO activity, oxLDL, and TBARS). The presence of MetS showed an association with LDL oxidation risk (multiple lineal regression according to sex and age, p < 0.001). High levels of triglycerides (p < 0.001) and waist circumference (p < 0.012) were associated with oxLDL levels, as well as an association between TBARS and oxLDL with ferritin levels. Through logistic regression analyses, the highest quartile of ferritin was associated with a threefold risk of developing MetS compared to the lowest quartile; also, TBARS showed a 21-fold risk for the development of MetS. Finally, elevated levels of oxidative stress parameters such us oxLDL, TBARS, HO, and Fe storage were associated to MetS.