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《Acta Nutrimenta Sinica》 2002-02
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WANG Zhu, MEN Jian hua, YANG Xue xin, HONG Jie (Institute of Nutrition and Food Hygiene, Chinese Academy of Preventive Medicine, Beijing 100050, China)  
Objective: To investigate the specific effects of resistant starch (RS) on zinc status in rats. Methods: (1)Zinc metabolism in normal rats: Three groups of Wistar rats were fed with basal diet (control), diet with 13% or 26% RS respectively, for 18 days. Urine, fecal and blood samples were collected for zinc measurement. Zinc apparent absorption was calculated.(2)Zinc status in rats fed with high sucrose (50%) diet: Three groups of Wistar rats were fed with basal diet, high sucrose digestible starch diet (S DS) or high sucrose resistant starch diet (S RS, containing 14% RS) respectively for 12 w. Samples of urine, blood, liver, pancreas and kidney were collected for measurement of zinc content. Results: (1)Zinc apparent absorption in normal rats was: control group 56.59%, 13%RS group 50.11%, and 26%RS group 54.40%. (2)High sucrose diet led to increased postprandial glucose and HbA 1C and depressed fast insulin level in S DS group rats, with decreased plasma and pancreas zinc level (compared with control group, P0.05). In S RS group, the rats were of normal blood glucose status, with lower urine excretion and higher erythrocyte zinc level compared with S DS group (P0.05). High kidney zinc was detected in S RS group. Conclusion: RS has no effect on zinc apparent absorption in normal rats. But for the rats fed with high sucrose diet, RS is of potential benefit to maintenance of zinc status.
【Fund】: 国家自然科学基金 (No.3 0 0 70 65 7
【CateGory Index】: R151.3
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