Postprandial blood glucose responses to gelatinized starches in totally gastrectomized rats

• Published in: Nippon Nōgeikagaku Kaishi Vol. 61; no. 5; pp. 581 - 585
• Main Authors: Nakajima, A. (Matsuyama Shinonome Junior Coll. (Japan)), Ebihara, K
• Format: Journal Article
• Language: Japanese
• Published: Japan Society for Bioscience, Biotechnology, and Agrochemistry 01.05.1987
• Subjects: ALMIDON; AMIDON; BLOOD COMPOSITION; COMPOSICION DE LA SANGRE; COMPOSITION DU SANG; GLUCOSA; GLUCOSE; RAT; RATA; RATS; STARCH
• ISSN: 0002-1407; 1883-6844
• DOI: 10.1271/nogeikagaku1924.61.581

The effects of gelatinized corn, rice, wheat, potato and sweet potato starches were studied on the postprandial blood glucose response. The subjects were totally gastrectomized and non-operated male Wistar rats weighing about 150g. All starch loads were calculated to 250mg of glucose per 100g body weight of rats. In non-operated rats, corn, rice and wheat starches elicited similar blood glucose responses, whereas potato and sweet potato starches elicited lower responses. In gastrectomized animals, corn, rice and potato starches elicited a similar glucose response, and the changes elicited by these starches were greater than the change by sweet potato starch. The blood glucose response elicited by sweet potato starch loading was not influenced by total gastrectomy. Potato starch showed a low gastric emptying rate, and sweet potato starch showed low digestibility. Although it is necessary to take into account the influence of total gastrectomy on intestinal functions, we conclude from these observations that the “rate-limiting step” of the blood glucose response after corn, rice or wheat starch loading is gastric emptying step. In addition, the low gastric emptying rate of potato starch and the low digesti-bility of sweet notato starch could be responsible for the different blood glucose responses elicited by the starch loadings