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  • Title: [Effects of black and red rice on the formation of aortic plaques and blood lipids in rabbits].
    Author: Chen Q, Ling W, Ma J, Mei J.
    Journal: Wei Sheng Yan Jiu; 2000 May 30; 29(3):170-2. PubMed ID: 12725067.
    Abstract:
    In order to observe the antiatherosclerotic effects of black and red rice and to find out their mechanism, 24 New Zealand male white rabbits (average body weight 1.91 kg) were divided randomly into three groups (white rice, black rice and red rice groups). The rabbits were fed a cholesterol-enriched diet (cholesterol 5 g/kg, lard 35 g/kg) containing 300 g/kg white, black and red rice powder respectively. The rabbits were sacrificed 10 weeks later. The aorta was dissected and stained in 0.5% oilred-isopropanol solution. The plaque area and total area of aorta were measured by an automatic image analyzer. Serum lipids were determined by an automatic analyzer. The results showed that the plaque area (% of total surface) in the black and red rice groups was significantly lower than that in the white rice group (P < 0.05). Serum TG, TC, LDL-C, ApoB and ApoAI/ApoB were not significantly different among the three groups (P > 0.05). However, the concentrations of HDL-C and ApoAI were significantly higher in the black and red rice groups than those in the white groups (P < 0.05). No significant difference was found between the black and red rice groups. It is concluded that black and red rice might be effective in reducing atherosclerotic plaques on the aorta of rabbits fed a cholesterol-enriched diet. The effectiveness of black and red rice against atherosclerosis might be related to the high level of serum HDL-C and ApoAI.
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