Effects of Potato Starch Granules on Digestive Enzymes of Rats

Fujita, Syuzo; Takaya, Tomohisa; Fuwa, Hidetsugu

doi:10.4327/jsnfs1949.34.4_287

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“…In vitro and in vivo experimental studies suggest that banana starch granules are largely indigestible [2][3][4]. Since the starch is poorly digestible and decreases as the banana ripens, and since the sucrose, fructose and glucose contents, which comprise the readily absorbable portion, increase with ripening, we wished to determine if compositional changes affect the plasma glucose and insulin response to ingestion of a defined amount of banana.…”

Section: Introductionmentioning

confidence: 99%

Plasma glucose and insulin responses to bananas of varying ripeness in persons with noninsulin-dependent diabetes mellitus.

Ercan

Nuttall

Gannon

et al. 1993

Journal of the American College of Nutrition

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With progressive ripeness there is a decrease in starch and an increase in free sugar content of bananas. The starch also is considered to be poorly digestible. Therefore, we decided to study plasma glucose, serum insulin, C-peptide, and plasma glucagon responses to bananas with increasing degrees of ripeness. Seven male subjects with untreated noninsulin-dependent diabetes mellitus ingested 50 g carbohydrate as bananas of stage 4 (more yellow than green), 5 (yellow with green tip), 6 (all yellow), and 7 (yellow flecked with brown) ripeness. They also received 50 glucose on two occasions for comparative purposes. On a separate occasion water only was given as a control. The area responses were quantified by determining incremental areas using the water control as baseline. The mean glucose area following the 50 g glucose meals was 15.1 +/- 1.9 mM.h. After the ingestion of bananas of 4, 5, 6 and 7 ripeness the glucose area response was 42, 41, 51 and 48% of that after glucose ingestion, respectively. The insulin area response following glucose meals was 888 pM.h. Responses to 4, 5, 6 and 7 bananas were 85, 70, 61, 85%, respectively, of that following glucose ingestion. C-peptide data were similar to the insulin data. The glucagon area response was negative after glucose ingestion but was positive following banana ingestion. In summary, the glucose, insulin, C-peptide, and glucagon area responses varied little with ripeness of the bananas.

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Section: Introductionmentioning

confidence: 99%

Plasma glucose and insulin responses to bananas of varying ripeness in persons with noninsulin-dependent diabetes mellitus.

Ercan

Nuttall

Gannon

et al. 1993

Journal of the American College of Nutrition

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“…We investigated the influence of hardly digestive starch such as PSG on digestive tracts and enzymes of rats , and showed that a-amylase [EC 3.2.1.1.] activity in pancreas was significantly decreased by feeding rats on a PSG diet and that intestinal sucrase [EC 3.2.1 .48] activity was significantly increased, but that intestinal maltase [EC 3.2.1.20] and isomaltase [EC 3 .2.1.10] activities scarcely changed (4)(5)(6). These changes were also observed when feeding rats on a diet containing dietary fiber of high water-holding capacity, for example Konbu, a kind of sea vegetable (7).…”

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The influence of hardly digestive starch granules on sucrase and isomaltase in small intestinal mucosa of rats.

Fujita

Fuwa

1984

Journal of Nutritional Science and Vitaminology, J Nutr Sci Vit

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SummaryThe effects of potato-starch granules (PSG) on sucrase and isomaltase activities in the small intestinal mucosa of rats were examined by gel filtration on a Sephacryl S-300 column . Young and adult rats were administered the diet containing 50% of either PSG or pregelatinized potato starch (PPS) as a control for 7days. Mucosal homogenates were prepared from the small intestine and separated into their component disaccharidases on the column. The sucrase activity , increased by feeding young rats on the PSG diet, was detected in the sucrase-Isomaltase complex by changing the activity ratio of the two enzymes . In adult rats, however, the complex seemed to be mature and the increased sucrase moiety was newly combined with a free isomaltase moiety and comprised a portion of the complex. These changes were observed not only in soluble disaccharidases but also in membrane-bound ones . Furthermore, there was a remarkable change of sucrase activity in the distal portion of the small intestine rather than in the proximal .

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Effects of Potato Starch Granules on Digestive Enzymes of Rats

Cited by 2 publications

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Plasma glucose and insulin responses to bananas of varying ripeness in persons with noninsulin-dependent diabetes mellitus.

Plasma glucose and insulin responses to bananas of varying ripeness in persons with noninsulin-dependent diabetes mellitus.

The influence of hardly digestive starch granules on sucrase and isomaltase in small intestinal mucosa of rats.

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