• Applied Microscopy
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• 제43권2호
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• pp.54-64
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• 2013

The study examined the antioxidant activities and anti-inflammatory effects of rutin from the streptozotocin (STZ)-induced diabetic rats. Results revealed that the levels of plasma glucose and serum glucose were remarkably higher in the STZ-treated group compared to other groups and were significantly reduced in the STZ+rutin treated group compared to the STZ-treated group. In terms of weight, it significantly increased in all experimental groups during the experiment period except for STZ-induced diabetic group. The weight of the STZ-treated group was remarkably reduced compared to other groups. Regarding the weight of each body organ, the STZ-treated group showed higher organ weight compared to the other groups while STZ+rutin-treated group showed significantly reduced kidney and liver weights compared to those of STZ-treated group. In the pancreas tissue of the STZ-treated group, ${\beta}$-cell destruction and vacuolization were observed. Inflammation in the heart, liver, kidney, and retina tissues were also vividly recorded. In the STZ+rutin administered group, the heart and retina tissues were shown to be preserved normally while the liver and kidney tissues showed reduced histopathology in general compared to the STZ-treated group. Conclusionally, the rutin has the effect on the antioxidant activities and anti-inflammation in the STZ-induced diabetic rats.

• Journal of Acupuncture Research
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• 제20권3호
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• pp.1-14
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• 2003

Objective : The aim of the study was to investigate the preventive effect of Acanthopanax senticosus(AS) aqua-acupuncture into Sinsu(BL23) of the multiple low-does strepozotocin(STZ)-induced diabetic rats. Methods : The experimental animals were divided into 4 groups : normal group of rats, control group of multiple low-does STZ-induced diabetic rats, NSAA group with 0.4ml normal saline(NS) aqua-acupunctured subcutaneously into Sinsu in multiple low-does STZ-induced diabetic rats, and ASAA group with 0.4ml of 20% AS aqua-acupunctured subcutaneously into Sinsu in multiple low-does STZ-induced diabetic rats. Each of AS and NS aqua-acupuncture was done subcutaneously into both loci of Sinsu taking turns everyday for 3 weeks. Thereafter the levels of serum glucose, body weight, index of kidney hypertrophy, urine glucose, urinary albumin excretion, creatinine clearance, mesangial cell and TGF-${\beta}1$ expression in glomeruli and tubular cells were measured on the determined day. Conclusions : 1. Both ASAA and NSAA groups decreased the serum glucose levels in multiple low-dose STZ-induced diabetic rats as compared to the cintrol group, and ASAA group showed more significant decreases than NSAA group. 2. Both ASAA and NSAA groups prevented the development of diabetes in multiple low-dose STZ-induced diabetic rats as compared to the control group, and ASAA group prevented more markedly the development of diabetes than NSAA group. 3. Both ASAA and NSAA groups prevented the reduction of body weight in multiple low-dose STZ-induced diabetic rats as compared to the control group, and ASAA group showed the same as the normal group. 4. Both ASAA and NSAA groups did not show any changes of the creatinine clearance in multiple low-does STZ-induced diabetic rats. 5. Both ASAA and NSAA groups prevented the excretion of urinary glucose and albumin in multiple low-dose STZ-induced diabetic rats as compared to the cintrol group, and ASAA group showed more significant prevention than NSAA group. 6. Both ASAA and NSAA groups prevented the expansion of glomerular cells and the protein expression of transforming growth factor-${\beta}1$ in multiple low-dose STZ-induced diabetic rats as compared to the cintrol group, and ASAA group prevented more significantly than NSAA group.

• 한국식품영양과학회지
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• 제20권4호
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• pp.306-311
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• 1991

Streptozotocin(STZ)에 의해서 유도된 당뇨성 쥐에서 nicotinamide의 영향을 알아보기 위하여 혈중 당의농도, 지질함량 변동과 동맥경화 지표와의 상관관계를 관찰하였다. STZ 투여로서 혈중당의 농도가 증가되던 것이 nicotinamide의 전처리로 정상상태로 억제되었고 total lipid 및 triglyceride 함량에서도 STZ 투여로 증가되던 것이 nicotinamide 전처리로 억제되었으나 phospholipid 함량에는 별다른 영향이 없었다. 혈중 total cholesterol. VLDL, LDL-cholesterol 함량 및 동맥경화 지표는 STZ에 의해 증가되었으나 nicotinamide 전처리로 저지되었으며 HDL-cholesterol 함량에서는 STZ 투여에 의해 감소되던 것이 nicotinamide의 전처리로 회복되었다. 혈중 lipase의 활성은 STZ 투여로서 억제되던 것이 nicotinamide의 전처리로 회복되었다. s-ALT 및 s-AST의 활성은 STZ 투여군이나 nicotinamide 전처리 군에서나 별다른 영향이 없었다. 이상의 실험 결과에서 nicotinamide의 전처리는 STZ에 의하여 유도되는 당뇨병을 예방할 것이라는 사실은 다른 측면에서 뒷받침하는 것으로 본 연구에서는 당뇨성 고지혈증의 예방에 nicotinamide가 유용하게 응용될 수 있는 가능성을 제시하고 있다.

• 생명과학회지
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• 제20권5호
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• pp.691-696
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• 2010

본 연구에서는 STZ로 당뇨병이 유발된 흰쥐의 간, 신장, 췌장 조직으로부터 소당탕(SDT)의 항산화 효과를 확인하여 다음과 같은 결과를 얻었다. 1. SDT의 투여는 간, 신장, 췌장 내 항산화효소인 SOD의 활성을 유의적으로 증가시켰다. 2. SDT의 투여는 간, 신장, 췌장 내 항산화물질인 GSH의 농도를 유의적으로 증가시켰다. 3. SDT의 투여는 간, 신장, 췌장 내 지질과산화 산물인 MDA의 농도를 유의적으로 감소시켰다. 이상의 결과로 볼 때 소당탕은 STZ로 유발된 당뇨병 흰쥐에서 항산화효소 활성과 항산화물질 생성을 증가시키고, 산화물질 생성을 억제함으로써 항산화 효과가 확인되었다.

• The Korean Journal of Physiology
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• 제30권2호
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• pp.231-236
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• 1996

In our previous study (Kim et al, 1991), GLUT 4 protein content correlated negatively with plasma glucose levels in skeletal muscles of STZ-induced diabetic rats. Thus, in this study, to confirm whether expression of GLUT 4 correlate negatively with degree of hyperglycemia, we measured levels of GLUT 4 mRNA in red and white gastrocnemius muscles in STZ-induced mild and severe diabetic rats. Rats were randomly assigned to control, mild, and severe diabetic groups, and the diabetes was induced by intraperitoneal administration of STZ. The experiment was carried out 10 days after STZ administration. Gastrocnemius red and white muscles were used fur the measurement of GLUT 4 expression. Plasma glucose levels of mild and severe diabetic rats were increased compared to control rats (control, mild, and severe diabetes; $6.4{\pm}0.32,\;9.4{\pm}0.68,\;and\;22.0{\pm}0.58$ mmol/L, respectively). Plasma insulin levels of mild and severe diabetic rats were decreased compared to control rats (control, mild, and severe diabetes; $198{\pm}37,\;l14{\pm}14,\;and\;90{\pm}15$ pmol/L, respectively). GLUT 4 mRNA levels of gastrocnemius red muscles in mild and severe diabetic rats were decreased compared to control rats ($64{\pm}1.2%\;and\;71{\pm}2.0%$ of control, respectively), but GLUT 4 mRNA levels in gastrocnemius white muscles were unaltered in diabetic rats. In summary, GLUT 4 mRNA levels were decreased in STZ-induced diabetic rats but did not correlated negatively with degree of hyperglycemia, and this result suggest that the regulatory mechanisms of decreased GLUT 4 mRNA levels are hypoinsulinemia and/or other metabolic factor but not hyperglycemia. And regulation of GLUT 4 expression in STZ-induced diabetes between red and white enriched skeletal muscles may be related to a fiber specific gene regulatory mechanism.

• Journal of Nutrition and Health
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• 제36권4호
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• pp.335-343
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• 2003

This study was designed to investigate the hypoglycemic effects of Benincasa hispida (Wax gourd) in streptozotocin (STZ)-induced diabetic rats. Diabetes was induced in the male rats by intravenous injection of STZ at a dose of 45 mg/kg dissolved in citrate buffer. The diabetic animals then had plasma glucose concentration of above 300mg/dl. The experimental groups were divided into five groups; normal, STZ-control and three Wax gourd groups (5%, 10% and 20% intake groups). Normal and STZ-control groups were fed on a AIN-93 diet and experimental groups were fed a AIN-93 diet with the Wax gourd powder (5%, 10% and 20%/kg diet) for 4 weeks. The body weight, diet intake and feed efficiency ratio (FER) were monitored. The blood glucose and cholesterol levels were determined everyweek. After 4 weeks, the rats were sacrificed and the levels of glucose, insulin, cholesterol, HDL-cholesterol, triglyceride and free fatty acids in plasma and levels of glycogen in liver and muscle were analyzed. Diabetic rats showed the lower weight gain compared to the normal rats. The weight gain and feed efficiency ratios in 15 and 20% Wax gourd groups were higher than in STZ-control group. The plasma glucose levels were significantly lower in all Wax gourd groups than in STZ-control group. The plasma insulin levels in diabetic groups were not significantly different compared to the normal group, but the level of 20% Wax gourd group was higher than other diabetic groups. The experimental diabetic groups showed the higher levels of muscle glycogen compared to STZ-control group. The lower levels of plasma cholesterol were noticed in 20% Wax gourd group throughout the experimental period. The plasma level of triglyceride was elevated in STZ-diabetic control and the levels were slightly decreased in Wax gourd groups. Rats of 10% Wax gourd group showed the lower levels of plasma free fatty acids. It is suggested, from the results, that the possibility of therapeutic or preventive use of wax gourd to the diabetes mellitus.

• 동아시아식생활학회지
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• 제20권3호
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• pp.372-381
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• 2010

This study was designed to examine the effects of sea buckthorn (SBT) on the plasma blood glucose and cholesterol level in diabetic rats. Diabetes mellitus was induced in male Sprague-Dawley rats weighing 200~220 g 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 SBT powder for 4 weeks. The experimental groups were divided into 6 groups which consisted of normal (N)-control group, N-SBT 10% and N-SBT 20% treated groups, STZ-control, STZ-SBT 10% and STZ-SBT 20% treated groups. The rats' body weight, aminotransferase activities and hematocrit (Hct) values were measured along with plasma levels of blood glucose and cholesterol. Body weight losses were observed by diabetic groups While the nondiabetic rats gained weight. There were significant differences between the control group and the diabetic groups in the weight of kidney. Aspartate aminotransferase activity was lower in the non-diabetic group compared to diabetic experimental groups. The blood glucose were significantly decreased in the 10% SBT of diabetic group. The cholesterol level of STZ-SBT 10% and STZ- SBT 20% were significantly lower than for the STZ-control group. These results show that the supplementation of sea buckthorn leave powder may have favorable influence on reducing blood glucose and cholesterol level in STZ-induced diabetic rats.

• 대한한의학회지
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• 제16권2호
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• pp.337-347
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• 1995

The purpose of this study was to investigate the effect of pretreatment with Saegchinyanghyoltang(SYT) on the serum lipid composition and atherosclerotic index in streptozotocin(STZ)-induced diabetic rats. SYT pretreatment in STZ-induced diabetic rats inhibited the rise of serum glucose concentration. Serum total lipids and triglyceride levels in the STZ -induced diabetic rats were significantly higher than those in the control group. But in the group pretreated with SYT, triglyceride and lipid levels were significantly lower compared with those of STZ -induced diabetic rat group without STZ. However, the serum phospholipid levels were not statistically different among treatment groups. In the STZ-induced diabetic group, the serum total cholesterol, VLDL-, LDL-cholesterol levels and atherosclerotic index Were higher and HDL-cholesterol level was lower compared to the control group. However, these changes were prevented by SYT pretreatment Pretreatment with SYT significantly increased the activities of serum lipase compared to the STZ-treated group.

• 한국식품영양과학회지
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• 제37권4호
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• pp.445-451
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• 2008

양파김치를 이용한 가공식품의 개발을 위해 streptozotocin(STZ)으로 유도한 당뇨병 흰쥐를 이용하여 양파김치 추출물 투여에 대한 혈당강하 및 지질성분의 함량 변화를 조사하였다. 체중변화는 정상군은 4주 사육기간 동안 지속적으로 증가하였으나, STZ 유도 당뇨대조군은 유의하게 감소되었다. 양파김치 추출물과 quercetin 투여군에서도 유의한 체중감소가 있었으나 투여군 간에 유의한 차이는 없었다. 혈당 농도는 정상군에 비해 STZ로 유도한 당뇨흰쥐에서 유의하게 증가되었으며, 투여 2주에서부터 대조군에 비해 양파김치 추출물 투여군과 quercetin 투여군에서 유의하게 감소되었다. 그러나 식이농도 증가 및 투여군 간에 유의한 차이는 없었다. 소변량은 정상군에 비해 STZ로 유도한 당뇨흰쥐에서 유의하게 증가되었으나 양파김치 추출물 및 quercetin 투여군의 식이농도 증가에 유의한 차이는 없었다. 신장무게는 정상쥐에 비해 당뇨쥐에서 증대되었으며, 양파김치 추출물 및 quercetin 투여군에서 유의하게 낮은 수준을 나타내어 정상군과 차이가 없었다. 혈청 총콜레스테롤 및 중성지질은 정상쥐에 비해 STZ 유도 당뇨대조군에서 증가되었으나 양파김치 추출물 및 quercetin 투여군에서 낮은 수준을 나타내었다. 이러한 결과는 양파김치 추출물 섭취가 당뇨쥐에서 증가된 혈당 및 혈청 콜레스테롤 수준을 감소시킬 수 있음을 의미하는 것이다.

• Biomolecules & Therapeutics
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• 제4권4호
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• pp.437-442
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• 1996

Hypoglycemic effect of Tabebuia avellandae was investigated in the streptozotocin(STZ)-induced diabetic rats. Diabetes was induced in male Sprague-Dawley rats by injections of STZ (45 mg/kg, i.v.). Rats weighing 200-250 g were divided into 6 groups: normal, STZ-control, hexane fr., CHCl$_3$fr., BuOH fr. and $H_2O$ fr. group. Normal and STZ-control rats received 3% Tween 80 only. Four groups of diabetic rats were administered orally at doses of 100, 400, 300 and 400 mg/kg/day of hexane, CHC1$_3$, BuOH and $H_2O$ fr. respectively. Fractions were administered orally to the rats for 7 days after STZ injection. All rats were anesthetized with ether, blood samples were taken by cardiac puncture for clinical chemistry and the rats were killed by exsanguination. Liver, kidney, heart and spleen were removed, weighed and analyzed. We measured glucose, protein, cholesterol and triglyceride levels in the plasma and glycogen, cholesterol and triglyceride levels in liver. The extent of blood glucose decrement in rats administered $H_2O$ fraction was greater than that in the STZ-control rats. The serum cholesterol and triglyceride levels were significantly lowered by administration of $H_2O$ fraction compared with those of STZ-control group. Treatment of rats with Tabebuia avellandae fractions caused decreases in STZ-induced elevation of cholesterol and triglyceride. Liver triglyceride level was significantly lowered hexane and BuOH fraction group compared with STZ-control group. These results suggest that $H_2O$ fraction of Tabebuia avellandae has the hypoglycemic action against STZ-induced diabetic rats.