• Journal of Nutrition and Health
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• 제36권10호
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• pp.981-989
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• 2003

The hypoglycemic effects of four edible plants (Angelicae tenuissimae (A. ten.), Pleurospermum kamtschaticum (P. kam.), Adenophora remotiflora (A. rem.) and Zanthoxylum schinifolium (Z. sch.)) in streptozotocin (STZ) -induced diabetic rats were investigated. Sprague-Dawley male rats weighing 190-230 g were induced diabetes mellitus by the STZ injection (45 mg/kg) into the tail vein and were divided into six groups ; normal, STZ-control and four edible plant groups (A. ten., P kam., A. rem. and Z. sch. groups). Normal and STZ-control groups were fed a AIN-93 diet and four groups of STZ-induced diabetic rats were fed one of each experimental diets containing 10％ of the edible plant powder for 4 weeks. Diabetic rats showed the lower weight gain compared to the normal rats. In experimental groups except P. kam., AST activities were close to normal. A. ten. group were lowered ALT activities slightly. The plasma glucose levels of the diabetic experimental groups were significantly decreased at 4th week. The plasma insulin levels in diabetic experimental groups were not significantly different compared to the STZ-control group. The liver glycogen levels in STZ injected rats were significantly lower in compared to the normal rats. However no significant differences were found in response experimental plants intake in diabetic rats. The muscle glycogen were not significantly different among all the groups.

• Journal of Community Nutrition
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• 제2권2호
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• pp.164-169
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• 2000

The purpose of this study was to examine the effect of taurine supplementation time on the activity of the enzymes metabolizing lipid peroxide in the liver of streptozotocin(STZ)-induced diabetic rats, Sprague-Dawley male rats were fed the purified diet for 7 weeks. They were supplemented with or without 1% taurine in drinking water before or after STZ injection or during all experimental procedure. In comparison to diabetic group without taurine, glucose-6-phosphatase(G6Pase) activity was decreased in diabetic group supplemented with taurine before STZ injection, and it was increased in diabetic group supplemented with taurine after STZ injection, but the difference was not significant. Glutathione S-transferase(GST) activity was significantly increased by the injection of STZ. However, the GST activities of diabetic groups exposed to taurine after STZ injection or during all experimental procedure were significantly decreased. Glutathione peroxidase(GPx) activities was significantly decreased by STZ injection. However, only in diabetic group supplemented with taurine before STZ injection, GPx activities was not decreased by the STZ injection. These results suggest that taurine supplementation may change the activities of GSH-related enzymes metabolizing lipid peroxide in the liver of streptozotocin(STZ)-induced diabetic rats and that may be helpful for the prevention of diabetic complication.

• 한국임상수의학회지
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• 제25권6호
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• pp.452-457
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• 2008

This study examined the effects of the daily administration of high-molecular-weight (HMW) chitosan in drinking water (0.8 %) on kidney function in streptozotocin (STZ)-induced diabetic ICR mice. The HMW chitosan lowered the blood urea nitrogen (BUN), serum and urine creatinine levels, urine protein levels, and albuminuria and reduced the kidney weight in STZ-induced type 1 diabetic ICR mice. On histopathological findings, capillary loops are open, but narrowed, and the mesangial matrix enlarged in the STZ-induced diabetic ICR mice. By contrast, the capillary loops and mesangial matrix of the chitosan-treated ICR mice were nearly normal compared with the STZ-induced diabetic ICR mice.

• Journal of Nutrition and Health
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• 제34권1호
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• pp.3-13
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• 2001

This study was conducted to investigate the effect of soyligosaccharides on improvement of diabetes mellitus. Sprague Dawley rats were divided into three groups. Control and one experimental group were fel AIN-93G diet(mixed diet) and the other experimental group was fed a similar diet containing 5% soyligosaccharides(oligosaccharide diet) for 6 weeks. Experimental groups were divided into two sub-groups after streptozotocin(STZ) injection and fed th mixed diet or the oligosaccharide diet for the next 2 weeks. Followings are final experimental and control groups: MM (mixed dietlongrightarrowSTZ injectionlongrightarrowmixed diet). MO(mixed dietlongrightarrowSTZ injectionlongrightarrowoligosaccharide diet), OM( oligosaccharide dietlongrightarrowSTZ injectionlongrightarrowmixed diet), OO(oligosaccharide dietlongrightarrowSTZ injectionlongrightarrowoligosaccharide diet), C(mixed dietlongrightarrowplacebo injectionlongrightarrowmixed diet). Blood glucose was analyzed at d1, d8 and d12 after streptozotocin injection. At the end of the experimental period, fecal bifidobacteria, plasma insulin, total lipid, triglyceride, cholesterol, and leptin concentrations was analyzed, After STZ injection, blood glucose level was significantly elevated in experimental group compared to a control group. Elevated blood glucose level declined faster in OO group compared to the other experimental groups. Meanwhile, insulin concentration decreased in all experimental groups compared to a control group. The number of bifidobacteria was significantly increased in oligosaccharide diet groups after STZ injection (MO and OO) than a mixed diet group(MM). Plasma cholesterol concentration significantly decreased in oligosaccharide diet groups(MO and OO) compared to mixed diet groups (MM and OM) after SZ injection. Plasma triglyceride and liver cholesterol concentrations significantly decreased in MO group compared to other experimental groups. Meanwhile, plasma leptin concentration was significantly lower in oligosaccharide diet groups after STZ injection(MO and OO) compared to a control group. The results in this study suggest that the dietary soyoligosaccharides has strong on reduction of reduction of blood glucose and lipid concentrations in streptozotoicin-induced diabetic rats. Thus, the use of soyoligosaccharides at a diet for IDDM patients may help to improve diabetes mellitus symptoms.(Korean J Nutrition 34(1) : 3-13, 2001)

• Journal of Acupuncture Research
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• 제25권3호
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• pp.115-125
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• 2008

Diabetes mellitus is a worldwide epidemic. Global projections suggest that most nations will have a doubling of the incidence of Diabetes mellitus(DM) within 20years. The Herb-Combined Remedy(HCR) of DM was known as one of anti-hyperglycaemic agents. But it is unclear whether HCR can be used to treat patients with Diabetic nephropathy or not. The present study was designed to investigate the anti-hyperglycaemic and preventive effects from diabetic nephropathy of HCR in STZ-induced diabetic rats. Treatment with HCR regulated blood glucose levels, but did not affect body weights. In addition, HCR was able to decrease blood glucose levels after 120min. Serum BUN levels were not effective but, serum Creatinine levels were lowered by treatment with HCR or MF. In histopathological observation of renal tissue, both HCR and MF groups showed decreased tendency of inflammation and renal injury. In conclusion, these results demonstrate that HCR is effective to treat patients with DM and also has preventive activity on diabetic nephropathy.

• Journal of Nutrition and Health
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• 제34권6호
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• pp.619-625
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• 2001

Diabetes mellitus was induced in male Sprague-Dawley rats weighing 200-245g by injection of streptozotocin(STZ) into the tail vein at a dose of 45mg/kg and were divided into seven groups ; normal, diabetic control, and five experimental groups(fractions of hexane, chloroform(CHCl$_3$), ethylacetate(EtOAc), butanol(BuOH) and water($H_2O$)). The rats of all groups were fed on AIN-93 diet and the five experimental groups were orally administered each fraction for 14 days. The body weight and diet intake were monitored daily. The plasma levels of glucose, insulin, cholesterol, triglyceride, HDL-cholesterol, free fatty acid and aspartate and alanine aminotransferase activities were analyzed. Diabetic rats showed the lower weight gain compared to the normal rats. The plasma glucose levels of the CHCl$_3$, and $H_2O$ fraction groups were significantly lower than the other experimental groups. The plasma insulin level of the CHCl$_3$ fraction group was much higher than that of diabetic control group. The plasma cholesterol levels were increased in all the experimental groups. The groups of hexane, BuOH and H2() fractions showed the lower plasma triglyceride levels compared to diabetic control group. The plasma free fatty acid levels were not significantly different in all groups. HDL-cholesterol levels were definitely higher in hexane, CHCl$_3$ and EtOAc fraction groups than that of diabetic control group. In conclusion, administration of CHCl$_3$ and $H_2O$ fractions of methanol extract of Alisma canaliculatum exhibited hypoglycemic effects in STZ induced diabetic rats, showing the possibility of therapeutic use of Alisma canaliculatum to the diabetes mellitus.

• 생명과학회지
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• 제20권12호
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• pp.1750-1757
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• 2010

본 연구에서는 streptozotocin (STZ)에 의해 유도된 당뇨병 흰쥐를 이용하여 부안산 오디의 항 당뇨효과를 in vivo 실험을 중심으로 조사하였다. 기존의 연구는 주로 in vitro 실험을 통해 이루어 졌으며 일부 지역의 오디는 STZ에 의해 유도된 당뇨병 흰쥐에서 신진대사 증진, 항산화 및 체내 지방 저하 효과가 있음이 시사 되어졌다. 먼저, Sprague-Dawley 수컷 흰쥐를 난괴법을 통해 하나의 정상군(Normal)과 대조군(Diabetic), 인슐린 처리군(Insulin), 0.5% 오디 투여군(0.5% Mulberry), 1.0% 오디 투여군(1.0% Mulberry) 그리고 2.0% 오디 투여군(2.0% Mulberry) 등으로 분류 한 후 STZ로 당뇨병을 유도하였다. 부안산 오디를 STZ에 의한 당뇨병 흰쥐에 4주간 투여한 후 정상군과 비교 했을때 다양한 농도의 오디를 투여한 그룹에서 몸무게, 혈중 인슐린의 농도는 감소했지만, 신장무게, 혈당량, 요량 및 음수량은 증가하였다. 추가적으로 STZ에 의한 당뇨병 흰쥐와 이들 동물들에게 오디를 투여한 그룹을 비교한 결과 오디를 투여한 그룹은 신장 무게, 혈당, 요량 및 음수량이 확연히 감소하였다. 또한 오디를 투여한 그룹에서의 인슐린 농도는 대조군과 비교하여 유의적으로 증가하였다. 이와 같은 연구결과로부터 부안산 오디는 향후 당뇨 합병증을 억제하기 위한 기능성 식품의 원료로 사용 되어질 가능성을 시사한다.

• 생명과학회지
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• 제20권11호
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• pp.1569-1576
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• 2010

White-skinned sweet potato (WSSP, Ipomoea batatas L.)는 인도네시아 및 다른 나라 등에서 전통약제로 당뇨병 치료에 널리 사용되고 있다. 본 실험에서는 흰 쥐를 streptozotocin (45 mg/kg체중, i.p.)으로 당뇨병을 유발시킨 후 WSSP의 메탄올 추출물을 체중 1 kg당 Dose 100; 200 mg/kg을 경구로 투여하였다. 산화적 스트레스에 대한 보호효과를 평가하였고 그 효능을 인슐린 분비촉진제인 glimepiride (50 mg/kg 체중)와 비교해 보았다. 산화적 스트레스 평가는 WSP 메탄올 추출물과 glimepiride를 2주 투여 한 후 간장조직의 지질 과산화물(LPO)함량, 혈청 AST, ALT, total triglyceride (TG), total cholesterol (TC), 그리고 항산화효소들인 superoxide dismutase (SOD), 카탈라아제(CAT), 글루타치온 과산화물 분해효소(GPx), 글루타치온 S-전이효소(GST)활성도 등을 간장에서 측정하여 시행하였다. 당뇨 흰쥐에서 혈당, LPO 함량, AST, ALT, TG, TC 함량 등은 정상군에 비하여 그 값이 증가하였고, SOD, CAT, GPx, GST 활성도 값은 감소하였다. 당뇨 흰쥐에 WSSP 메탄올 추출물(200 mg/kg)을 2주일 동안 투여한 결과 의미있는 혈당 감소를 볼 수 있었고, LPO, TG, TC, AST, ALT 함량에서도 개선효과를 볼 수 있었다. 또한 SOD, GPx, 그리고 CAT등 항산화효소들의 활성도 증가도 나타났다. 따라서 WSSP 메탄올 추출물은 당뇨쥐의 혈당을 낮추어 산화적 스트레스를 약화시키고 당뇨로 유발된 손상을 보호해 주는 효과가 있다는 결과를 얻었다.

• Journal of Nutrition and Health
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• 제41권7호
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• pp.583-593
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• 2008

This study was designed to examine the effects of Salicornia herbacea L. (glasswort: GW) on hepatic antioxidative enzyme activities in diabetic rats. Diabetes mellitus was induced in male Sprague-Dawley rats weighing 200-220g by an injection of streptozotocin (STZ) dissolved in a citrate buffer into the tail vein at a dose of 45 mg/kg of body weight. Sprague-Dawley rats were fed an AIN-93 recommended diet and the experimental groups were fed a modified diet containing 10% and 20% of glasswort powder for 4 weeks. The experimental groups were divided into 6 groups which consisted of normal (N)-control group, N-GW 10% and N-GW 20% treated groups, STZ-control, STZ-GW 10% and STZ-GW 20% treated groups. The activities of Xanthine oxidase (XOD), glutathione- S-transferase (GST), glutathione peroxidase (GPX), glutathione reductase (GR), superoxide dismutase (SOD) and CAT (CAT) were measured in the homogenates of liver. The activity of CAT was lower in the supplementary group with glasswort compare to the STZcontrol group but it was not significantly different. The activity of SOD was not significant in all of experimental groups. The activity of GR was significantly increased in the normal supplementary group with glasswort, and GPX activity was significantly increased in STZ-GW 10% group compare to the STZ-control group. The activity of XOD was significantly decreased in the all of supplementary groups with glasswort. The activity of GST was significantly increased in the N-GW 20% group and it was significantly decreased in the STZ-GW 20% group. These results show that the supplementation of glasswort may have favorable influence on antioxidative status in diabetic rats and it may be useful for the diabetic complications as functional food.

• Journal of Microbiology and Biotechnology
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• 제20권4호
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• pp.817-820
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• 2010

Type 1 diabetes mellitus (T1DM) is an autoimmune disease characterized by extreme insulin deficiency due to an overall reduction in the mass of functional pancreatic ${\beta}$-cells. Several animal models have been used to study T1DM. Amongst these, the mini-pig seems to be the most ideal model for diabetes research, owing to similarities with humans in anatomy and physiology. The purpose of this study was to analyze differentially expressed pancreatic proteins in a streptozotocin (STZ)-induced mini-pig T1DM model. Pancreas proteins from mini-pigs treated with STZ were separated by two-dimensional gel electrophoresis, and 11 protein spots were found to be altered significantly when compared with control mini-pigs. The data in this study utilizing proteomic analysis provide a valuable resource for the further understanding of the T1DM pathomechanism.