Paturi Gunaranjan, Butts Christine A, Joyce Nigel I, Rippon Paula E, Morrison Sarah C, Hedderley Duncan I, Lister Carolyn E
The New Zealand Institute for Plant and Food Research Limited, Private Bag 92169, Auckland 1142, New Zealand.
The New Zealand Institute for Plant and Food Research Limited, Private Bag 11600, Palmerston North 4442, New Zealand.
Foods. 2021 Apr 9;10(4):813. doi: 10.3390/foods10040813.
Consumption of polyphenols and dietary fiber as part of a normal diet is beneficial to human health. In this study, we examined whether different amounts of dietary soluble fiber (pectin) affect the absorption and metabolism of polyphenols from blackcurrant and green tea in rats. After 28 days, the rats fed blackcurrant and green tea with pectin (4 or 8%) had significantly lower body weight gain and food intake compared to the rats fed a control diet. Rats fed a blackcurrant and green tea diet with 8% pectin had significantly higher fecal nitrogen output and lower protein digestibility. No polyphenols were observed in the urine, feces and plasma of rats fed the control diet. Parent catechins and flavonols were absent in urine obtained from all diet groups. Gallocatechin glucuronide was only observed in the plasma of rats fed the blackcurrant and green tea diet without pectin. Meanwhile, epicatechin and catechin gallate were present in the feces of rats fed a blackcurrant and green tea diet with and without 4% pectin. Pectin (4 or 8%) added to the blackcurrant and green tea diet increased the plasma antioxidant capacity in rats. Inclusion of pectin in the diet altered the host absorption and metabolism of polyphenols from blackcurrant and green tea.
作为正常饮食一部分摄入多酚和膳食纤维对人体健康有益。在本研究中，我们检测了不同量的膳食可溶性纤维（果胶）是否会影响大鼠对黑加仑和绿茶中多酚的吸收及代谢。28天后，与喂食对照饮食的大鼠相比，喂食添加了果胶（4%或8%）的黑加仑和绿茶的大鼠体重增加和食物摄入量显著降低。喂食含8%果胶的黑加仑和绿茶饮食的大鼠粪便氮排出量显著更高，蛋白质消化率更低。喂食对照饮食的大鼠的尿液、粪便和血浆中未观察到多酚。所有饮食组大鼠的尿液中均未检测到原儿茶素和黄酮醇。仅在喂食不含果胶的黑加仑和绿茶饮食的大鼠血浆中观察到没食子儿茶素葡萄糖醛酸苷。同时，喂食含4%果胶和不含4%果胶的黑加仑和绿茶饮食的大鼠粪便中均存在表儿茶素和儿茶素没食子酸酯。添加到黑加仑和绿茶饮食中的果胶（4%或8%）提高了大鼠血浆抗氧化能力。饮食中添加果胶改变了宿主对黑加仑和绿茶中多酚的吸收及代谢。
