Flückiger-Isler R, Mörikofer-Zwez S, Kahn J M, Walter P
Department of Biochemistry, University of Basel, Switzerland.
J Nutr. 1994 Sep;124(9):1647-53. doi: 10.1093/jn/124.9.1647.
As shown previously, glycogen deposition in liver and muscle is significantly greater in rats fed a diet containing barley malt extract than in those fed diets containing glucose or starch. We investigated whether particular components of malt extract (glucose oligomers, inorganic salts, protein) were responsible for this effect. Food-deprived rats were fed diets containing carbohydrates of different chain lengths [glucose, maltose, maltodextrins or malt carbohydrates (84-86 g/100 g)] in the presence and absence of inorganic salts (2 g/100 g) and maltodextrin diets (78 g/100 g) containing either no protein or 20 g casein/100 g. Dietary glucose oligomers caused higher blood glucose concentrations than consumption of glucose or maltose but had no significant influence on liver or muscle glycogen. Salt addition resulted in higher muscle glycogen concentrations but had no effect on blood glucose or liver glycogen. Hepatic glycogen concentrations were significantly greater in rats fed casein compared with those fed no protein. We propose that consumption of malt extract has the following advantages over consumption of diets containing glucose or maltose: 1) better glucose absorption related to the presence of glucose oligomers, 2) greater hepatic glycogen concentrations associated with the protein in malt extract, and 3) greater glycogen concentrations in muscle due to the presence of inorganic salts.
如先前所示，与喂食含葡萄糖或淀粉日粮的大鼠相比，喂食含大麦芽提取物日粮的大鼠肝脏和肌肉中的糖原沉积显著更多。我们研究了麦芽提取物的特定成分（低聚葡萄糖、无机盐、蛋白质）是否是造成这种效应的原因。在有无无机盐（2 g/100 g）的情况下，给饥饿的大鼠喂食含不同链长碳水化合物的日粮[葡萄糖、麦芽糖、麦芽糊精或麦芽碳水化合物（84 - 86 g/100 g）]，以及不含蛋白质或含20 g酪蛋白/100 g的麦芽糊精日粮。日粮中的低聚葡萄糖比摄入葡萄糖或麦芽糖导致更高的血糖浓度，但对肝脏或肌肉糖原没有显著影响。添加盐导致肌肉糖原浓度更高，但对血糖或肝脏糖原没有影响。与喂食无蛋白质日粮的大鼠相比，喂食酪蛋白的大鼠肝脏糖原浓度显著更高。我们认为，与食用含葡萄糖或麦芽糖的日粮相比，食用麦芽提取物具有以下优点：1）与低聚葡萄糖的存在相关的更好的葡萄糖吸收，2）与麦芽提取物中的蛋白质相关的更高的肝脏糖原浓度，以及3）由于无机盐的存在，肌肉中的糖原浓度更高。
