• Journal of Pharmaceutical Investigation
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• v.12 no.1
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• pp.12-22
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• 1982

The experimental study have showed that the Polygonatum officinale All. contains diosgenin and ${\beta}-sitosterol$ as active components. Even though many experimental studies were reported, still there are many unknown actions of components from the plant. The purpose of this study was to elucidate the mechanism of hypoglycemic action of ether extract of Polygonatum officinale. The hypoglycemic effect of the ether extract was tested in hyperglycemic rats induced experimentally, The effect on plasma free fatty acid and the acute toxicity were also examined by using mouse. The hypoglycemic effect of the ether extract was compared with other oral hypoglycemic agents such as chlorpropamide and buformin. The ether extract of Polyonatum officinale showed a marked hypoglycemic effect by 1 hour after oral administration in hyperglycemic rats and rabbits but the ethanol extract did not exhibit the hypoglycemic effect. The hypoglycemic effect of the ether extract was potentiated by chlorpropamide while buformin was weak.

• Archives of Pharmacal Research
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• v.13 no.3
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• pp.269-273
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• 1990

Blood glucose and total lipid levels in rats with streptozotocin-induced diabetes were determined after intraperitoneal administration of methanolic extract of Ixeris dentat whole plants and its main component, cynaroside (=luteolin 7-O--$\beta$-D-glucoside). From the data obtained, it was concluded that intraperitoneal administration of the methanolic extract produced a significant hypoglycemic effect. Total blood lipids were also decreased. Cynaroside in the streptozotocin-diabetic rats failed to exhibit hypoglycemic effect but a significant hypolipemic activity was observed. Thus, it is suggested that this methanolic extract may contain one or more hypoglycemic and hypolipemic principles including the main flavone glucoside, cynaroside, which can significantly reduce the levels triglyceride and total cholesterol in streptozotocin-diabetic rats.

• Korean Journal of Pharmacognosy
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• v.32 no.3 s.126
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• pp.248-252
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• 2001

The present study was undertaken to elucidate the hypoglycemic effect and inhibitory effect of Cudrania tricuspidata root bark on aldose reductase activity. C. tricuspidata MeOH ext. 1,000 mg/kg showed a significant blood glucose lowering effect on alloxan-induced hyperglycemic rats and increasing body weight. C. tricuspidata MeOH ext. showed a potent inhibitory effect on bovine lens aldose reductase.

• Advances in Traditional Medicine
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• v.7 no.2
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• pp.205-210
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• 2007

The objectives of the study were (1) To evaluate the safety and tolerability of Damtab. (2) To characterize hypoglycemic effect of Damtab, if any. (3) To evaluate insulin sensitivity effect of Damtab, if any. Hypoglycemic effect of Damtab (700 mg and 1,400 mg) were examined. Gliclazide (80 mg) was used as an active control. Placebo was used as control. Breakfast was given, half an hour before dosing whereas lunch, snacks and dinner were given at 6, 10 and 14 h post dose. An oral glucose tolerance test was conducted to calculate the insulin sensitivity index from the values of glucose and insulin during oral glucose tolerance test. Both giclazide 80 mg and Damtab 1,400 mg significantly lowered plasma glucose level up to 6 h. Insulin sensitivity index of Damtab (1,400 mg) was found to be similar to that of placebo. A significant increase in insulin level at 1 h post dose of Damtab (1,400 mg) was observed. Damtab 700 mg shows placebo like effect whereas Damtab 1,400 mg possesses hypoglycemic effect.

• Korean journal of food and cookery science
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• v.14 no.5
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• pp.577-583
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• 1998

Methanol extracts of Commelina communis, a Korean wild edible plant showing hypoglycemic effect on diebetic rats were fractionated systematically by hexane, chloroform, butanol, and water, and these four fractions were administered orally to streptozotocin-induced diabetic rats to evaluate the hypoglycemic effect. The butanol and water fractions of Commelina communis lowered blood glucose levels of diebetic rats at a dose of 500 mg/kg/day. Administration of each fraction except that of chloroform increased the plasma protein levels. Liver protein levels were significantly higher in the butanol- and water fraction-fed groups. The results suggest that the butanol fraction of Commelina communis has hypoglycemic effect on diabetic rats and the intake of Commelina communis may be beneficial for the management of diabetes mellitus.

• YAKHAK HOEJI
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• v.41 no.6
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• pp.709-713
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• 1997

For the investigation of bioactive natural products with hypoglycemic effect, we have evaluated various extracts of Pulsatillae Radix(Ranunculaceae), which has been used in traditional medicine for hematochezia due to intense evil heat, malaria, chills and fever, epistaxis and internal hemorrhoids. The ethylacetate extract of the radix of this plant was found to show a significant hypoglycemic effect on alloxan diabetogenic mice. Using bioactivity-guided chromatographic purification of the ethylacetate extract, hypoglycemic constituent: 2${\beta}$, 3${\beta}$, 14${\alpha}$, 20, 22R, 25-hexahydroxy-cholest-7-en-6-one was isolated and structurally identified by physico-chemical properties and spectroscopic evidences.

• The Korean Journal of Food And Nutrition
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• v.21 no.4
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• pp.425-429
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• 2008

Diabetes mellitus is a group of metabolic diseases characterized by hyperglycemia resulting from defects in insulin secretion, insulin action, or both. Type 1 diabetes, or juvenile-onset diabetes, results from a cellular-mediated autoimmune destruction of the ${\beta}$-cells of the pancreas. Type 2 diabetes, or adult-onset diabetes, is a term used for individuals who have insulin resistance, a condition that makes it harder for the cells to properly use insulin, and usually have relative insulin deficiency. The diabetes causes the onset of chronic complications and diabetic neuropathy is one of the most debilitating complications. In this study, the hypoglycemic effect and the preventive effect of diabetic complications of Dioscorea rhizoma extract(DRE) were examined in rodent model. We investigated the glucose tolerance test and long term hypoglycemic effect of DRE in Type 1 streptozotocin-induced diabetic rats and Type 2 diabetic db/db mice. DRE showed a hypoglycemic effect on blood glucose levels than that of control group in Type 1 streptozotocin-induced diabetic rats and Type 2 diabetic db/db mice. On the basis of our results, we conclude that long-term use of DRE might help decrease blood glucose level and prevention of diabetes-associated complication.

• Korean Journal of Pharmacognosy
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• v.31 no.3
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• pp.268-272
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• 2000

GE974, isolated from Gyrophora esculenta, showed significant inhibitory effect on several ${\alpha}-glucosidases$ in vitro in previous study. In the present study, GE974 showed significant inhibitory effect on blood glucose elevation in mice loaded with maltose, sucrose, starch and lactose. Also, it exhibited similar effect in alloxan and streptozotocin induced diabetic mice, and genetic diabetic mice(db/db mice) loaded with maltose in dose dependent manner. These results suggest that GE974 may possess hypoglycemic effect that inhibit competitively ${\alpha}-glucosidase$ activities.

• Archives of Pharmacal Research
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• v.13 no.1
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• pp.113-116
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• 1990

People in some tropical countries used to use some plant extracts in folklore medicine as treatment of diabetes melitus. Of these plants is Calligonum comsum ("orta"). The present work deals with the biochemical effects of the whole plant water extract given orally to the albino rats, normals and alloxan diabetics, as to fulfil its hypoglycemic effects on rats. The results showed that "orta" extract produced a hypoglycemic effect indicated by the decrease in blood sugar level. It was observed that the diabetic state in rats treated with 300 mg/kg body weight of "orta" extract, was alleviated, showeing normal levels of blood glucose, liver fat and cholesterol contents. Liver proteins were still below the normal level in the rats. Gibenclamide, a hypoglycemic drug, was used for comparison with "ora" extract. Although it did alleviate the diabetic state, yet the liver fat and cholesterol contents were still higher than those of normal. Also the liver proteins were lower than the control levels.

• Nutrition Research and Practice
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• v.3 no.4
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• pp.272-278
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• 2009

Postprandial hypoglycemic effect of mulberry leaf (Morus alba L.) was compared in two animal models: Goto-Kakizaki (GK) rats, a spontaneous non-obese animal model for type II diabetes, and their counterpart control Wistar rats. First, the effect of a single oral administration of mulberry leaf aqueous extract (MLE) on postprandial glucose responses was determined using maltose or glucose as substrate. With maltose-loading, MLE reduced peak responses of blood glucose significantly in both GK and Wistar rats (P < 0.05), supporting the inhibition of $\alpha$-glucosidase by MLE in the small intestine. With glucose-loading, MLE also significantly reduced blood glucose concentrations, measured at 30 min, in both animal models (P < 0.01), proposing the inhibition of glucose transport by MLE. Next, dried mulberry leaf powder (MLP) was administered for 8 weeks by inclusion in the diet. By MLP administration, fasting blood glucose was significantly reduced at weeks 4 and 5 (P < 0.05), but then returned to values that were similar to those of the control at the end of experimental period in GK rats. Insulin, HOMA-IR, C-reactive protein, and triglycerides tended to be decreased by MLP treatment in GK rats. All other biochemical parameters were not changed by MLP administration in GK rats. Collectively, these findings support that MLE has significant postprandial hypoglycemic effect in both non-obese diabetic and healthy animals, which may be beneficial as food supplement to manage postprandial blood glucose. Inhibitions of glucose transport as well as $\alpha$-glucosidase in the small intestine were suggested as possible mechanisms related with the postprandial hypoglycemic effect of MLE.