1. Anti-Atherogenic Effects of a Phenol-Rich Fraction from Brazilian Red Wine (Vitis labrusca L.) in Hypercholesterolemic Low-Density Lipoprotein Receptor Knockout Mice
- Author
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Jarbas Mota Siqueira, Carla Ianssen, Fatima Abatepaulo, Beatriz Veleirinho, Mariana Appel Hort, Heraldo Possolo de Souza, Ângela Cristina Bet, Elke Zuleika Schuldt, Silvia DalBó, Marcelo Maraschin, and Rosa Maria Ribeiro-do-Valle
- Subjects
Male ,medicine.medical_specialty ,Hypercholesterolemia ,Ethyl acetate ,Medicine (miscellaneous) ,Wine ,Vasodilation ,Acetates ,Mice ,chemistry.chemical_compound ,Phenols ,Internal medicine ,medicine ,Animals ,Receptor ,Triglycerides ,Mice, Knockout ,Nutrition and Dietetics ,Cholesterol ,Cholesterol, HDL ,food and beverages ,Arteries ,Cholesterol, LDL ,Atherosclerosis ,Diet ,Mice, Inbred C57BL ,Endocrinology ,Receptors, LDL ,chemistry ,Biochemistry ,Models, Animal ,LDL receptor ,Knockout mouse ,lipids (amino acids, peptides, and proteins) ,Brazil ,Lipoprotein - Abstract
Moderate wine intake (i.e., 1-2 glasses of wine a day) is associated with a reduced risk of morbidity and mortality from cardiovascular disease. The aim of this study was to evaluate the anti-atherosclerotic effects of a nonalcoholic ethyl acetate fraction (EAF) from a South Brazilian red wine obtained from Vitis labrusca grapes. Experiments were carried out on low-density lipoprotein (LDL) receptor knockout (LDLr⁻/⁻) mice, which were subjected to a hypercholesterolemic diet and treated with doses of EAF (3, 10, and 30 mg/kg) for 12 weeks. At the end of the treatment, the level of plasma lipids, the vascular reactivity, and the atherosclerotic lesions were evaluated. Our results demonstrated that the treatment with EAF at 3 mg/kg significantly decreased total cholesterol, triglycerides, and LDL plus very low-density lipoprotein levels compared with control hypercholesterolemic mice. The treatment of mice with EAF at 3 mg/kg also preserved the vasodilatation induced by acetylcholine on isolated thoracic aorta from hypercholesterolemic LDLr⁻/⁻ mice. This result is in agreement with the degree of lipid deposit on arteries. Taken together, the results show for the first time that the lowest concentration of an EAF obtained from a red wine produced in southern Brazil significantly reduced the progression of atherosclerosis in mice.
- Published
- 2012