Hyperlipidemias: Xia X

Yang TL, Chen MF, Xia X, Luo BL, Li YJ. · Department of Cardiovascular Medicine, Xiang-Ya Hospital, Central South University, Changsha, Hunan 410008, China. · Eur J Clin Pharmacol. · Pubmed #16447050 No free full text.

Abstract: OBJECTIVE: To test whether treatment with fenofibrate decreases asymmetric dimethylarginine (ADMA) level in hypertriglyceridemic individuals. METHODS: In the present study, 45 subjects with hypertriglyceridemia were recruited to receive treatment with fenofibrate (200 mg/d). Serum concentrations of ADMA, malondialdehyde (MDA), nitric oxide (NO) and tumor necrosis factor-alpha (TNF-alpha) were measured. Endothelial function assessed by flow-mediated dilation (FMD) of the brachial artery was performed. RESULTS: Compared with control, serum levels of ADMA (0.47+/-0.05 micromol/L in control and 0.62+/-0.28 micromol/L in hypertriglyceridemic patients, P<0.01), MDA and TNF-alpha were markedly elevated, and the level of NO was significantly reduced, concomitantly with impaired endothelium-dependent vasodilation in individuals with hypertriglyceridemia. 8-week treatment with fenofibrate significantly reduced the elevated levels of ADMA (0.53+/-0.12 micromol/L, P<0.01), MDA and TNF-alpha, attenuated the decreased level of NO and improved endothelial function. CONCLUSIONS: These results suggest that the beneficial effect of fenofibrate on the endothelium in hypertriglyceridemic individuals may be related to reduction of ADMA level.

Guo H, Ling W, Wang Q, Liu C, Hu Y, Xia M, Feng X, Xia X. · Department of Nutrition, School of Public Health, Sun Yat-sen University (Northern Campus), 74 Zhongshan Road 2, Guangzhou, Guangdong Province, 510080, P. R. China. · Plant Foods Hum Nutr. · Pubmed #17187297 No free full text.

Abstract: This study was designed to evaluate the effect of an anthocyanin-rich extract from black rice on hyperlipidemia and insulin resistance in fructose-fed rats. Rats fed fructose diet for 4 weeks exhibited significantly higher plasma insulin levels and lower insulin sensitivity than the control rats fed AIN-93G diet. Dietary supplementation with the anthocyanin-rich extract (5 g/kg of high-fructose diet) prevented the development of fructose-induced insulin resistance. After fructose-induced insulin resistance had been established, 4-week treatment with the anthocyanin-rich extract (5 g/kg of high-fructose diet) or pioglitazone (270 mg/kg of high-fructose diet) ameliorated the glucose intolerance and hyperlipidemia, but the extract failed to reverse the fructose-induced hyperinsulinemia as pioglitazone did. In addition, rats supplemented by the extract exhibited lower oxidative stress than the fructose-fed controls, as indicated by the lower concentrations of plasma thiobarbituric acid reactive substances and blood oxidized glutathione. Overall, these results suggest that the anthocyanin-rich extract from black rice improves certain metabolic abnormalities associated with diets high in fructose.