Instituto Superior de Investigaciones Biológicas (INSIBIO), CONICET-UNT, and Instituto de Química Biológica "Dr. Bernabé Bloj", Facultad de Bioquímica, Química y Farmacia, UNT, Chacabuco 461, T4000ILI - San Miguel de Tucumán, Argentina.
Food Funct. 2015 Oct;6(10):3266-74. doi: 10.1039/c5fo00174a.
Andean roots and tubers are underexploited crops; many contain compounds beneficial to health, so a greater knowledge of their properties is important for encouraging their consumption. The aim of this work was to study the content of bioactive compounds of yacon and oca and their effect on intestinal health using as a model rats of the Wistar strain. Two varieties of ocas (Overa and Rosada) and yacon, which contain significant amounts of fructooligosaccharides and phenolic compounds, were chosen. Rats of the Wistar strain were fed for two months with diets containing these foods in amounts sufficient to provide 8% of fiber. A significant decrease in pH values and an increment in lactobacilli and bifidobacteria counts in the cecum of rats fed with inulin, oca Rosada and Overa were observed; there was no significant decrease in enterobacteriaceae and enterococci counts. The cecum antioxidant activity was incremented in rats fed with the experimental foods with respect to the control diets. The components of dietary fiber and phenolic compound contents in yacon and oca produce effects that contribute to the intestinal health of the experimental animals.
安第斯根和块茎作物尚未得到充分开发；许多都含有对健康有益的化合物，因此，更多地了解它们的特性对于鼓励人们食用这些作物非常重要。本研究的目的是使用 Wistar 大鼠模型研究雪莲果和秘鲁玛卡的生物活性化合物含量及其对肠道健康的影响。选择了两种含有大量果寡糖和酚类化合物的秘鲁玛卡（Overa 和 Rosada）和雪莲果品种。Wistar 大鼠连续两个月食用含有这些食物的饮食，这些食物的摄入量足以提供 8%的纤维。结果发现，喂食菊粉、秘鲁玛卡 Rosada 和 Overa 的大鼠的盲肠 pH 值显著降低，乳酸菌和双歧杆菌数量增加；而肠杆菌科和肠球菌的数量没有显著减少。与对照饮食相比，实验组大鼠的盲肠抗氧化活性增加。雪莲果和秘鲁玛卡膳食纤维和酚类化合物的成分对实验动物的肠道健康产生有益影响。
