• 한국자원식물학회지
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• 제19권6호
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• pp.670-676
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• 2006

Tea polysaccharide had high antioxidant activity and it could be used to cure diabetes. Antioxidant activity of tea poly-saccharide (TPS) from three kinds of tea (green tea, oolong tea and black tea) were compared, the result indicated that oolong tea polysaccharide (OTPS) had the highest antioxidant activity. In order to explicate the mechanism of antioxidant and hypoglycemic activity, the streptozotocin (STZ)-induced diabetes mice model (DM) was established. The influence of OTPS on blood-glucose, content of MDA and NO, and activities of GSH-PX, SOD, NOS in serum, kidney and liver were investigated. The result showed that after four weeks injection of OTPS to DM mice, the blood-glucose of three treatment group reduced by 14.5%,21.5% and 33.3%, respectively, comparing to the model control. The reduction effect of OTPS increased with the rise of dose. The activity of SOD and GSH-PX elevated significantly, while the activity of NOS decreased. The content of MDA and NO reduced significantly. The above results imply that antioxidant activity was enhanced. Comparing to XKW treatment, the effect of a dose of 300mg/(kg. bw) OTPS was much better. The research showed that the OTPS had a significant effect on reducing blood glucose, and could enhance the antioxidant activity of DM mice.

• 동의생리병리학회지
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• 제22권2호
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• pp.340-345
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• 2008

Extract of Acanthopanax senticosus has recently been demonstrated to possess significant antidiabetic potential, in accordance with the traditional use of this plant as an antidiabetic natural health product. The present study evaluated the effects of fermented extract (FE) of this plant on glucose-stimulated insulin secretion, glucose uptake, and streptozotocin-induced type 1 diabetes model. A 3 h pretreatment with FE prevented $IL-1{\beta}$ and $IFN-{\gamma}$ toxicity in isolated rat islets. However, it did not affect insulin-stimulated glucose uptake in C2C12 myotubes. In addition, pretreatment of mice with FE blocked the destruction of streptozotocin-induced islets and the development of type 1 diabetes. FE reduced blood glucose level, increased insulin secretion, and improved glucose tolerance in streptozotocin-treated mice, whereas nonfermented extract (NFE) had moderate effects. Immunohistochemical staining for insulin clearly showed that pretreatment with FE blocked the STZ-induced islets destruction and restored the number of islet cells that secreted insulin to the level of the control. Although the active principles and their mechanisms of action remain to be identified, FE may nevertheless represent a novel complementary therapy and a source of novel therapeutic agents against type 1 diabetes mellitus.

• 대한약침학회지
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• 제9권1호
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• pp.33-44
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• 2006

Objectives : We performed this study in order to investigate the effects of Sedang-hwan(世糖丸) on the diabetes mellitus. Methods : We injected a vein with 65mg/kg of streptozotocin(STZ) on the rats. And then administered Sedang-hwan; 18.7mg/kg/day to sample groups and observed the weight and glucose level, insulin, C-peptide, triglyceride, albumin, T-protein, BUN(Blood Urea Nitrogen) and creatinine in blood. Results : 1. The sample groups showed a high suppressive effect of weight loss(P=0.002). 2. The sample groups' glucose level showed a effective in lowering level(P=0.001). 3. The sample groups showed a higher insulin level than control groups. 4. The sample groups showed a higher C-peptide level than control groups(P=0.001). 5. The sample groups' triglyceride level showed a effective in lowering level. 6. The sample groups showed a higher HDL-cholesterol level than control groups(P<0.001). 7. The sample groups showed a higher T-protein level than control groups(P=0.04). 8. The sample groups showed a higher albumin level than control groups(P<0.001). 9. The sample groups' creatinine level showed a effective in lowering level(P=0.04). 10. The sample groups' BUN level showed a effective in lowering level(P=0.03). Conclusions : Conclusively, Sedang-hwan was recognized to have decrease effect of serum glucose, triglyceride, creatinine, BUN of the diabetic rats induced by streptozotocin. It was suggested that Sedang-hwan can be used for effective diabetes mellitus medical treatment. It is also required to study further about detailed principles of blood-sugar dropping effect by Sedang-hwan, and recovery by diabetes mellitus.

• 생명과학회지
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• 제17권10호
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• pp.1387-1393
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• 2007

함박잎새버섯은 잎새버섯의 한 품종으로 농업과학기술원의 야생균주로부터 개량된 새로운 품종이다. 인공재배에 의하여 대량생산이 이루어지고 있다. Streptozotocin와 고지방식이에 의해 유도된 실험쥐 당뇨에 있어서 고혈당 및 고지질 혈에 대한 함박잎새버섯분말의 효능과 부분적인 기전을 6 주간의 사육기간을 통한 결과는 다음과 같다. 1. 함박잎새버섯분말 투여에 의한 체중증가량은 당뇨를 가진 실험쥐의 2 배로 분말이 당뇨에 의해 유도된 체중감소의 병폐현상을 막아주는 주는 역할을 하는 것으로 추정된다. 2. 함박잎새버섯분말 투여는 혈당을 약 200 mg/dl 정도 감소한 당뇨를 가진 실험쥐 혈당의 약 50% 수준이었다. 3. 당뇨 유발에 의해 증가된 Triglyceride, 총콜레스테롤, LDL-cholesterol의 함량은 함박잎새버섯분말 투여에 의해 용량-의존성 경향을 보이면서 감소되었다. 그러나 당뇨 유발에 의해 감소된 HDL-cholesterol 함량은 함박잎새버섯분말 투여에 의해 증가되었다. 4. 함박잎새버섯분말 투여에 의한 당뇨-유도성 췌장 손상정도가 감소하였으며 이러한 효능이 당뇨 유발 실험쥐에 있어서 고혈당과 고혈지질을 조절하는 부분적인 기전으로 이해된다.

• 한국식품위생안전성학회지
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• 제30권2호
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• pp.202-209
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• 2015

당뇨 합병증을 일으키는 중요 매체인 산화 스트레스에 대한 매생이 추출물과 그 지표물질인 pheophorbide a (PhA)의 정소 조직 내 산화 스트레스 보호 효과를 streptozotocin(STZ)에 의해 유발된 당뇨 쥐 모델에서 확인하였다. 당뇨를 유발하는 물질로 알려진 STZ를 40 mg/kg body weight(b.w.)의 농도로 복강 투여하여 당뇨를 일으킨 후, 매생이 추출물(CFE)샘플을 각각 4, 20 mg/kg b.w. 그리고 PhA를 0.2 mg/kg b.w.로 9 주간 투여하여 실험하였다. 정소 조직에서 산화 스트레스에 생성되는 체내 과산화물 지표인 혈액 nitric oxide와 지질 과산화물이 당뇨 유발군에 비해 CFE와 PhA 투여군에서 유의적인 감소를 보였으며, 체내 과산화물 축적을 제어하는 효소인 glutathione peroxidase, glutathione-S-transferase가 정상 수준으로 회복되었다. 또한, 체내 항산화 방어기작에서의 중요한 효소인 superoxide dismutase, catalase 활성 또한 샘플 투여 시 회복되는 것을 보아 CFE 투여군과 PhA투여군에서 조직 내 항산화 효소 조절과 함께 과산화물 축적 저해 효과를 통하여 당뇨 상태에서 고혈당에 의한 산화 스트레스가 일으키는 생식 조직 손상으로부터 매생이 추출물과 그 지표물질인 PhA는 보호 효과를 가지는 것을 확인할 수 있었다.

• Journal of Nutrition and Health
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• 제39권6호
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• pp.513-519
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• 2006

한국산 식용 및 야생식물의 항당뇨 효능에 대한 연구의 일환으로 본 연구에서는 동과의 ethanol 추출물을 계통분획하여 streptozotocin으로 당뇨를 유발시킨 흰쥐에게 14일간 경구투여한 후 조직의 글리코겐 함량, 단백질 함량, 지질함량 및 지질과산화에 미치는 영향을 비교 분석하여 다음과 같은 결과를 얻었다. 장기무게를 체중 100 g당 환산하였을 때 당뇨쥐의 간장, 신장 및 폐의 무게가 정상쥐에 비해 증가함을 확인할 수 있었고 췌장의 무게는 $CHCl_3$ 분획물 투여군이 당뇨대조군에 비해 유의적으로 높은 수치를 보였다. 간장의 글리코겐 함량은 정상군에 비해 모든 당뇨유발군에서 유의적으로 낮은 함량을 나타냈으며 $CHCl_3$ 분획물 투여군에서 증가되었으나 유의적인 차이는 보이지 않았다. 근육의 글리코겐 함량은 BuOH 분획물 투여군과 water 분획물 투여군에서 당뇨대조군에 비해 유의적으로 높은 함량을 나타내었다. 간장과 신장의 단백질 함량은 정상군과 모든 당뇨유발군 사이에 유의적인 차이를 보이지 않았고, 폐의 단백질 함량은 $CHCl_3$ 분획물 투여군을 제외한 모든 당뇨실험군이 당뇨대조군에 비해 낮은 수준을 나타내었다. 췌장의 단백질 함량은 BuOH 분획물 투여군과 water 분획물 투여군이 당뇨대조군보다도 유의적으로 높게 나타났다. 간장 콜레스테롤 함량은 당뇨대조군에 비해 BuOH 분획물 투여군과 water 분획물 투여군에서 유의적으로 낮은 수준을 보였고, 간장의 중성지방 함량은 당뇨대조군에 비해 BuOH 분획물 투여군과 water 분획물 투여군 유의적으로 높게 나타났다. 간장과 폐의 malondialdehyde (MDA) 힘량은 모든 당뇨유발군에서 높게 나타났으며 신장에서는 BuOH 분획물 투여군과 water 분획물 투여군에서 높게 나타났다. 췌장의 MDA함량은 BuOH 분획물 투여군과 water 분획물 투여군이 정상군보다도 낮은 수준이었다. 이상의 연구결과 STZ 유발 당뇨 흰쥐에게 동과의 BuOH 분획물과 water 분획물을 투여하였을 때 근육의 글리코겐 함량 증가, 간장의 콜레스테롤 감소 및 췌장의 지질과산화 억제에 효과가 있었으나 간장과 신장의 지질과산화를 감소시키는 효과는 없는 것으로 나타났다.

• Journal of Nutrition and Health
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• 제37권1호
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• pp.5-14
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• 2004

The purpose of this study was to investigate the effect of dietary sea-tangle extracts on blood glucose levels, serum lipid levels, thiobarbituric acid reactive substance (TBARS) and glutathione enzymes in diabetic rats treated with streptozotocin (STZ) Four groups of rats (Sprague-Dawley male rats, 180 - 200g) were consisted of normal rats fed control diet (C), diabetic rats fed control diet (CD), normal rats fed sea-tangl extracts diet (E), and diabetic rats fed sea-tangle extracts diet (ED). Diabetes was induced by single injection of streptozotocin (60 mg/kg B.W.). After 7 weeks, rats were sacrificed, serum glucose, serum total cholesterol, triglyceride levels and glutathione enzymes were measured. Urine was significantly higher in CD and ED groups than those of others (p < 0.05). Levels of amylase, calcium, uric acid, hemoglobin, cholesterol and low density lipoprotein (LDL)-cholesterol were different among four groups. But high density cholesterol (HDL)-cholesterol of ED group was significantly higher (p < 0.05) than other groups (C and E group) And the weekly change of serum glucose was decreased in the 3th,4th and 5th weeks. But serum triglyceride (TG) of diabetic rats fed sea-tangle extracts diet (ED) was lower than diabetic rats fed control diet (CD). Activity of hepatic microsomal G6Pase was significantly increased CD and ED groups higher than C and E group, but kidney was decreased ED group. Hepateic glutathione S-transferase (GST) of CD and ED group were significantly lower than C and E group (p<0.05), glutathione peroxidase (GPX) of E and ED group were significantly higher than C and CD group (p<0.05), glutathione reductase (GR) activities of ED group was significantly lower than other groups, malondialdehyde (MDA) of ED was lower than E and CD group, but kidney was increased significant in ED group compared to liver. These results suggested that dietary sea-tangle extracts reduce .hepatic disorders such as oxidant than kidney. In conclusion, dietary sea-tangle extracts groups reduced blood TG and hepatic MDA levels in STZ-induced diabetic rats.

• Journal of Ginseng Research
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• 제34권2호
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• pp.104-112
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• 2010

Fermented red ginseng (FRG) was prepared by inoculating 0.1% Lactobacillus fermentum NUC-C1 and fermenting them at $40^{\circ}C$ for 12 hours. The ginsenoside contents of FRG were increased compared with those of red ginseng (RG). Moreover, the levels of the ginsenosides Rg2, Rg3, and Rh2 in FRG increased significantly. In an oral glucose tolerance test (OGTT), blood glucose levels were lower in animals fed with RG and FRG extracts than in normal controls. In particular, FRG extracts in OGTT were superior to RG extracts. The antidiabetic effects of FRG in streptozotocin (STZ)-induced diabetic rats were investigated. Rats were divided into four groups: normal control, diabetes mellitus (DM), FRG administered at 100 mg/kg, and FRG administered at 200 mg/kg groups. FRG extracts were orally administered to each treatment group for 3 weeks, and blood glucose, insulin, and lipid levels of each group were determined. Orally administered FRG extracts significantly reduced blood glucose levels and increased plasma insulin levels in diabetic rats. Additionally, the activities of disaccharidases, including sucrase, lactase, and maltase, were decreased significantly in the FRG groups. FRG groups also had reduced triglyceride and total cholesterol levels, compared with the DM group. These results suggest that FRG may have antidiabetic effects in STZ-induced diabetic rats.

• 대한한방내과학회지
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• 제29권3호
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• pp.787-799
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• 2008

Objective : Diabetic nephropathy is the most common cause of end stage renal disease. AGE, $TGF-{\beta}1$ type IV collagen, and macrophage/monocyte infiltration are the main factors of diabetic nephropathy. We investigated the effects of Salvia miltiorrhiza on renal function and histopathological changes in streptozotocin(STZ)-induced diabetic nephropathy rat model. Methods : Diabetes was induced in male Sprague-Dawley rats(290${\pm}$10g) by injecting STZ(45mg/kg) into the tail vein. Rats were divided into 3 groups(n = 6): normal, control, and salvia. After 8 weeks of administration of Salvia miltiorrhiza extract on the Salvia group, we checked 24 hrs urine, blood biochemistry and renal tissue to evaluate renal function and histopathological changes by examining parameters including albuminuria, BUN, creatinine, cholesterol, LDL, TG, macrophage/monocyte antigen(ED-1), $TGF-{\beta}1$, AGE, and type IV collagen. Results : Salvia miltiorrhiza decreased the amount of 24hrs proteinuria, and inhibited histopathological changes of diabetic nephropathy including the expression and accumulation of various factors which could promote development of diabetic nephropathy. Conclusion : These findings suggest that Salvia miltiorrhiza might protect the renal function and inhibit the development of renal injury by regulating factors including AGE, $TGF-{\beta}1$ Type IV collagen, macrophage and monocyte infiltration. So Salvia miltiorrhiza can be used for diabetic patients to prevent the progression of diabetic nephropathy.

• Advances in Traditional Medicine
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• 제10권2호
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• pp.90-102
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• 2010

Effect of ethanol (ASE) and water (ASW) extracts of Argyreia speciosa on blood glucose and lipid profile was investigated in normoglycemic and Streptozotocin (STZ)-induced diabetic animals. In oral glucose and sucrose tolerance test, treatment with ASE and ASW (100 and 200 mg/kg) and Glidenclamide (10 mg/kg) significantly improved the glucose and sucrose tolerance in normal animals. In addition, respective treatment for fifteen-day resulted in significant percentage reduction in serum glucose (SG) ie., 30.39% (lower dose of ASE) and 33.21% (higher dose of ASW). In standardized STZ (50 mg/kg, iv)-induced diabetic rats, a single dose of ASE and ASW treatment exhibited reduction in SG levels at different time intervals compared to basal levels. Administration of both the doses of ASE and ASW for fifteen-day days exhibited greater percentage reduction in glycemia (24.6%, 24.7%, 23.9% and 21.9% respectively) and also ameliorated restored to near normal value of all tested lipid parameters. Further, treatment also exhibited significantly improved glucose tolerance over the period of 120 min compared to diabetic control group. Eventhough treatment failed to increase serum insulin levels significantly but peripheral utilization of insulin was increased as evident by insulin tolerance test. Taken together, present study supports the traditional usage of title plant in the treatment of diabetes mellitus.