Son Bo Kyung, Kim Jung Yun, Lee Sang Sun
Department of Food and Nutrition, Hanyang University, Seoul, South Korea.
Ann Nutr Metab. 2008;52(3):181-7. doi: 10.1159/000138121. Epub 2008 Jun 11.
BACKGROUND/AIMS: The present study was carried out to evaluate the nutritional quality of adlay (AD), buckwheat (BW) and waxy barley (WB), with particular respect to their fiber components. Plasma lipid parameters, gut transit time and thickness of the aortic wall in rats fed with different grains were evaluated and compared with rats fed on white rice (WR).
The rats were then raised for 4 weeks on an obesogenic diet based on the American Institute of Nutrition-93 (AIN-93 G) diets containing 1% cholesterol and 20% dietary lipids. 40 male rats were divided into 4 groups and raised for 4 weeks with a diet containing one of the following grains: WR, AD, BW, or WB.
Gut transit time was shortened depending on the grain, with the WB group having the shortest time, followed by the BW group and the AD group, and then the WR group. Plasma lipid profiles differed significantly according to grain combination, and the levels of triglycerides in the AD, BW and WB groups were significantly lower than that in the WR group. The BW and WB groups showed lower levels of total cholesterol and LDL-C, and higher HDL-C than the WR group, although the group fed on AD did not show such results owing to the high content of lipids and calories. Accordingly, the reduction in gut transit time resulted in decreasing levels of triglycerides, total cholesterol and LDL-C. Rats fed on WB and BW showed significantly larger aortic lumen than those fed with AD and WR. Also the wall thickness of the WB group was significantly thinner than that of the WR group.
Consumption of BW- and WB-containing diets significantly improved several cardiovascular risk factors induced by obesity in experimental rats.
背景/目的：本研究旨在评估薏仁（AD）、荞麦（BW）和糯大麦（WB）的营养质量，尤其关注其纤维成分。对喂食不同谷物的大鼠的血浆脂质参数、肠道转运时间和主动脉壁厚度进行评估，并与喂食白米（WR）的大鼠进行比较。
然后，将大鼠基于含有1%胆固醇和20%膳食脂质的美国营养学会93（AIN-93 G）饮食进行致肥胖饮食饲养4周。40只雄性大鼠分为4组，分别用含有以下谷物之一的饮食饲养4周：WR、AD、BW或WB。
肠道转运时间因谷物而异，WB组最短，其次是BW组和AD组，然后是WR组。血浆脂质谱根据谷物组合有显著差异，AD、BW和WB组的甘油三酯水平显著低于WR组。BW和WB组的总胆固醇和低密度脂蛋白胆固醇水平低于WR组，高密度脂蛋白胆固醇水平高于WR组，尽管喂食AD的组由于脂质和热量含量高未显示出这样的结果。因此，肠道转运时间的缩短导致甘油三酯、总胆固醇和低密度脂蛋白胆固醇水平降低。喂食WB和BW的大鼠的主动脉腔明显大于喂食AD和WR的大鼠。此外，WB组的壁厚度明显薄于WR组。
食用含BW和WB的饮食显著改善了实验大鼠肥胖诱导的几种心血管危险因素。
