oxidized LDL – ABC CARDIOL

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Effects of oxidized LDL on in vitro proliferation and spontaneous motility of human coronary artery endothelial cells

Hermes Toros Xavier et al. Dulcinéia Saes Parra Abdalla Tania Leme da Rocha Martinez José Antonio Franchini Ramires Antonio Ricardo de Toledo Gagliardi

OBJECTIVE: To investigate the effects of low concentrations of oxidized LDL (oxLDL) on the proliferation and spontaneous motility of human coronary artery endothelial cells (HCAEC) in culture. METHODS: Cultures of HCAEC were treated with low concentrations of native LDL (nLDL) isolated from human plasma and with LDL minimally oxidized through different chemical methods; the effects were compared. RESULTS: Native LDL had no deleterious effects on in vitro proliferation and motility of HCAEC; however, at its highest concentration and for a longer exposure, nLDL inhibited cell proliferation. The LDL chemically oxidized by spermine nonoate (SNO) and 3-morpholinylsydnonimine (SYN-1) had significant inhibiting effects on in vitro proliferation and motility of HCAEC, which were proportional to the greatest concentrations and degrees of oxidation of LDL. CONCLUSION: OxLDL has a cytotoxic effect, inhibiting the proliferation and spontaneous motility of HCAEC in culture. This effect is proportional to the concentration and degree of oxidation of LDL; native LDL is relatively innocuous.

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Artigo Original

Effect of eggplant on plasma lipid levels, lipidic peroxidation and reversion of endothelial dysfunction in experimental hypercholesterolemia

Paulo Afonso Ribeiro Jorge et al. Lidia C. Neyra Regina M. Osaki Eros de Almeida Neura Bragagnolo

PURPOSE: To study the effect of egg plant on endothelium-dependent relaxation, and plasma lipids in hypercholesterolemic rabbits, and to assess influence of this plant on the malondialdehyde (MDA) content of LDL particles and the arterial wall. METHODS: Thirteen male rabbits were randomly assigned to control (C), hypercholesterolemic (H) and egg plant (E) treated groups (n=10 each). The H and E rabbits were fed a diet supplemented with cholesterol (0.5%) and coconut oil (10%) for 4 weeks. In addition, group E received 10mL of the fruit juice/day during the last 2 weeks.The animals were killed and the aorta removed to measure MDA content and the endothelium dependent relaxation responses. Total plasma cholesterol, VLDL, LDL, HDL and triglyceride levels were determined using commercial kits. MDA was quantified in native and oxidized LDL and in the arterial wall. RESULTS: After 4 weeks, the E group rabbits had a significantly lower weight , plasma cholesterol, LDL, triglyceride and aortic cholesterol contentthan group H(p<0.05). The MDA content that was significantly increased in the LDL particles and in the arterial wall of H rabbits was reduced in the E group (p<0.05). Endothelium-dependent relaxation were significantly higher in the E group compared H group rabbits (p<0.05). CONCLUSION: In hypercholesterolemic rabbits egg plant juice significantly reduced weight, plasma cholesterol levels, aortic cholesterol content and the MDA concentrations in native-oxidized LDL and in the arterial wall and increased the endothelium-dependent relaxations.

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Effects of oxidized LDL on in vitro proliferation and spontaneous motility of human coronary artery endothelial cells

Effect of eggplant on plasma lipid levels, lipidic peroxidation and reversion of endothelial dysfunction in experimental hypercholesterolemia

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Electronic Document Format (Vancouver)

Electronic Document Format (ABNT)

Electronic Document Format (APA)

Electronic Document Format (ISO)