• Journal of Nutrition and Health
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• 제33권2호
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• pp.115-123
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• 2000

This study evaluates the effect of Dioscorea japonica Thunb subfractions on hyperglycemia and the composition of energy metabolites in diabetic rats. Diabetes emllitus was induced in male Sprague-Dawley rats by an injection of streptozotocin(STZ) dissolved in a citrate buffer into the tail vein at a dose of 45㎎/㎏ of body weight. Diabetic rats were assigned to 6 groups; STZ-control, subfraction A, B , C, D and E groups. All groups were fed an AIN-76 diet. The second butanol fraction of Dioscorea administered orally with carboxymethyl cellucose for 10 days after the STZ injection Body weight gain, diet intake and organ weights were monitored Levels of hematocrit, blood glucose, liver and muscle glycogen were measured. Levels of cholesterol, triglycerides and free fatty acids were also assayed. Body weight losses were observed by subfraction A group. Liver and kidney weights were not affected in any of the subgractioned groups. The decrease of blood glucose in daibetic rats which were fed Dioscorea japonica Thunb was significantly greater than the dicrease of blood glucose in the STZ-control group. cholesterol plasma level was not influenced in any subfraction of Dioscorea japonica Thunb. Liver triglyceride levels were significantly lowered in subfraction A compared with the STZ-control group. This study's results suggest that oral administration of subfraction C of Dioscorea japonica Thunb frction is capabl of reducing blood glucose, plasma triglyceride and free fatty acid levels, and therefore Dioscorea japonica Thunb may contain antihyperglycemic compounds.

• 한국식품영양과학회지
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• 제33권9호
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• pp.1457-1462
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• 2004

Wistar계 흰쥐에게 두릅, 오가피 및 느릅의 열수추출물을 급여하여 7주간 급여하였으며 희생 2주전에 STZ으로 당뇨를 유발하여 혈당이 300 ㎎/dL 이상인 흰쥐를 대상으로 혈장 중의 포도당 농도 및 바이오마커에 미치는 영향을 구명하였다. 혈장의 포도당 함량은 두릅나무과 식물의 열수추출물 급여시 대조군에 비해 유의적인 혈당저하 효과가 관찰되었으며, 혈장의 인슐린과 C-펩타이드 함량 역시 두릅, 오가피 및 느릅 열수추출물 급여시 STZ 투여에 의한 변화가 완화되었다. 혈장 중의 알부민 함량은 당뇨대조군이 정상군에 비하여 유의적으로 감소되었으며 실험식이 급여시 증가되는 경향이었다. 빌리루빈과 크레아티닌 함량은 STZ 투여로 유의적으로 증가되었으나 실험식이를 급여한 모든 군에서 유의적으로 감소되었다. 두릅, 오가피 및 느릅 열수추출물은 당뇨 유발로 증가된 혈장의 AST, ALT, ALP 및 LDH의 활성을 유의적으로 억제하였다. 따라서 두릅나무과 식물 중 두릅, 오가피 및 느릅의 열수추출물은 STZ 투여 흰쥐의 혈당강하 및 혈장바이오마커의 변화 개선에 효과적인 것으로 관찰되었다.

• 대한수의학회지
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• 제61권1호
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• pp.6.1-6.6
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• 2021

Opuntia ficus-indica has traditionally been used in prevention and treatment of various diseases such as diabetes mellitus. The current study was performed to determine whether Opuntia ficus-indica is associated with diabetes. Diabetic rat models were induced with streptozotocin (STZ). This study divided rats into 1 day (short-term) and 4 consecutive weeks (long-terms) of daily administration. These groups were subdivided into four groups each other for assessment of blood glucose level as follows: Group 1, untreated rats given distilled water; Group 2, untreated rats given Opuntia ficus-indica; Group 3, STZ-induced diabetic rats given distilled water; Group 4, STZ-induced diabetic rats given Opuntia ficus-indica. Blood glucose level was measured for one day and four weeks. In addition, serum markers of alanine aminotransferase (ALT), aspartate transaminase (AST), cholesterol, and creatinine were determined, and total protein triglycerides were measured at four weeks. Blood glucose level was highest in both groups (Group 3 and Group 4) at 30 minutes and two weeks and gradually decreased in a time-dependent manner. The difference in blood glucose among the four groups was significant (p < 0.05). Additionally, the levels of ALT, AST and triglycerides were significantly decreased by Opuntia ficus-indica.

• 동아시아식생활학회지
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• 제27권4호
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• pp.399-407
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• 2017

본 연구는 streptozotocin(STZ)으로 당뇨를 유발시킨 Sprague-Dawley계 수컷 흰쥐에게 4주간 삼채(Allium hookeri; AH) 뿌리를 식이에 보충한 정상대조군 normal-control(N-control)과 STZ-control, STZ-AH 5%와 STZ-AH 10% 첨가군을 당뇨실험군으로 하여 삼채의 잠재적인 항산화 식재료로써의 활용성을 확인하였다. 해당식이를 4주간 공급한 후, 간과 근육의 글리코겐, 간의 단백질과 MDA, 간의 세포질에서 XOD, GST, SOD, CAT, GR 및 GPX의 항산화효소 함량을 분석하여 다음과 같은 결과를 얻었다. 간의 글리코겐 함량은 N-control에 비해 STZ-control에서 유의적으로 낮았고, 당뇨실험군에서는 STZ-AH 5%에서 STZ-control보다 유의적으로 높은 함량 차이를 보였다. 근육의 글리코겐 함량은 N-control에 비해 STZ-control에서 유의적으로 낮았고, STZ-control에 비해 STZ-AH 5%와 STZ-AH 10%에서 유의적으로 높은 차이었다. 간의 단백질 함량은 N-control과 STZ-control에서는 유의적인 차이를 보이지 않았으나, STZ-control보다 STZ-AH 첨가군 모두에서 유의적으로 높았다. 간의 MDA 함량은 N-control보다 STZ-control에서 유의적으로 높은 함량이었고, STZ-control보다 STZ-AH 첨가군 모두에서 낮은 함량이었다. 간의 세포질에서 측정한 XOD 함량은 N-control과 STZ-control은 유의적인 차이를 보였고, 당뇨실험군에서는 STZ-control보다 STZ-AH 5%와 STZ-AH 10% 첨가군 모두에서 유의적으로 낮은 함량 차이를 보였다. GST 함량은 N-control에 비해 STZ-control에서는 유의적으로 낮았고, STZ-control 보다 STZ-AH 5%와 STZ-AH 10% 첨가군 모두에서 유의적으로 높은 함량이었다. SOD는 N-control과 STZ-control에서 유의적인 함량 차이를 보였으나, 당뇨실험군 간에는 STZ-control과 유의성을 보이지 않았다. CAT는 N-control과 STZ-control에서 유의적인 차이는 아니었으나, STZ-control과 비교하여 STZ-AH 10%에서 유의적으로 높은 함량 차이를 보였다. GR과 GPX 함량에서는 유의적인 차이를 보이지 않았다. 이상의 연구결과, 삼채뿌리 분말을 식이로 첨가하였을 때 당뇨시 간과 근육의 글리코겐과 간의 단백질 함량이 높아졌고, MDA 함량은 낮아졌다. 효소 함량은 XOD에서 낮아졌고, CAT와 GST에서 높아지는 경향이었다. 삼채는 STZ에 의한 포도당의 과부하에 의해 증가된 과산화물의 생성억제와 조직 내 세포의 산화적 스트레스 감소작용으로 생체내 항산화 방어력을 증가시킬 수 있으며, 당뇨 예방 및 치료를 위한 식사요법에 이용 가능한 식품으로 사료된다.

• Journal of Nutrition and Health
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• 제39권8호
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• pp.721-727
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• 2006

This study was conducted to investigate the effects of Aralia elata, Acanthopanacis cortex and Ulmus davidiana water extracts on blood hemoglobin, $HbA_{1c}$, levels and biomarkers in the streptozotocin (STZ)-induced diabetic rats. Male Wistar rats divided into normal and diabetic groups. The diabetic groups subdivided into the control group (DM) and Araliaceae water extracts supplemented groups: Aralia elata (AE), Acanthopanacis cortex (AC) and Ulmus davidiana (UD). The extracts were supplemented in diet base on 11.42 g of raw Araliaceae/kg diet for 7 weeks. The diabetes was induced by injecting 572 (55 mg/kg B.W., i.p.) once 2 weeks before sacrifying. Relative weights of liver were significantly lowered in the DM group compared to the normal group, whereas those of kidney and heart were significantly increased in the DM group. Supplementation of the Araliaceae water extracts improved reduced liver weights in STZ-induced diabetic rats. Blood glucose level was significantly higher in the DM group than in the normal group, whereas insulin contents were significantly lowered in the DM groups. However, these parameters were normalized in the An, AC and UD supplemented groups, respectively. Blood hemoglobin and $HbA_{1c}$ levels were significantly higher in the DM group than in the normal group. When all of Araliaceae water extracts were supplemented to the diabetic rats lowered hemoglobin and $HbA_{1c}$ levels. Red blood cell, white blood cell and Lymphocyte were significantly higher in the DM group than in the normal group. The supplementation of Araliaceae family water extracts significantly lowered these parameters compared to the DM group. MCV, MCH contents were declined in the DM group, while the supplementation of Aralia elata, Acanthopanacis cortex and Ulmus davidiana water extracts elevated of these contents in STZ-induced diabetic rats. Accordingly, these results indicate that Aralia elata, Aeanthopanacis corex and Ulmus davidiana water extracts would seem to improve the blood biomarkers in STZ-induced diabetic rats.

• Journal of Nutrition and Health
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• 제40권1호
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• pp.5-13
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• 2007

This study was designed to examine the effects of Salicornia herbacea L. (glasswort: GW) on the plasma blood glucose and lipid metabolites 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 rats' body weights, aminotransferase activities and hematocrit (Hct) values were measured, along with plasma levels of glucose, protein, cholesterol, HDL-cholesterol, triglyceride (TG) and free fatty acids (FFA). The non-diabetic rats gained weight, while the diabetic rats lost weight. There were significant differences between the control group and the diabetic groups in the weight of the kidney, liver and pancreas. Asparate aminotransferase activity was lower in the non-diabetic control group compared to diabetic experimental groups, even though the difference was not significant. The plasma protein of N-GW 20% group was lower among all experimental groups but it was not significantly different. The blood glucose levels of the STZ-GW 10% group and STZ-GW 20% group were significantly lower than for the diabetic-control group. There were no significant difference of cholesterol levels among diabetic groups. The normal rats of 20% glasswort group in FFA and TG levels showed significant changes among all groups. These results exhibited dose related effect of glasswort and it may contain antihypoglycemic compounds.

• 한국식품영양과학회지
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• 제26권6호
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• pp.1187-1193
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• 1997

The purpose of this study was to investigate the effects of green tea catechin on lipid metabolism in streptozotocin(STZ)-induced diabetic rats. Male Sprague-Dawley rats weighing 150$\pm$10gm were randomly assigned to one normal and three STZ-induced diabetic groups. Diabetic animals were fed catechin free diet(DM-0C group), 0.5% catechin diet(DM-0.5C group) and 1% catechin diet(DM-1C group). Diabetes was experimentally induced by intravenous injection of 55mg/kg body wt of STZ in citrate buffer(pH 4.3) after feeding of three experimental diets for 4 weeks. Animals were sacrificed at the 6th day of diabetic states. Levels of blood glucose were three fold higher in all three STZ-induced diabetic groups than that of the normal group. The levels of plasma insulin were markedly lower in three STZ-induced diabetic groups than that of the normal group. The levels of plasma cortisol were increased in DM-0C group compared with that of the normal group. Triglyceride, total-cholesterol and LDL-cholesterol levels in serum were increased in DM-0C groups compared with the normal group but were not significantly different between catechin diet groups and normal group. Serum HDL-cholesterol levels were reduced in DM-0C and DM-0.5C groups by 38% and 25%, respectively and had similar tendency in the DM-1C group compared with that of control group. Atherogenic index have shown same pattern as the result of total cholesterol. Activities of 3-hydroxy-3-methylglutaryl Co enzyme A(HMG-CoA) reductase were higher in DM-0C groups than those of the normal group but were not significantly different between catechin diet groups and the normal group. It is concluded that dietary catechins can modulate lipid levels of serum and liver HMG-CoA reductase activity in diabetic rats.

• 한국식품조리과학회지
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• 제18권3호
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• pp.300-308
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• 2002

The purpose of this study was to investigate the effect of chloroform(CHC1$_3$) fraction of Alisma canaliculatum All. Braun et Bouche(Ac) with selenium(Se) on the plasma glucose and lipid levels in streptozotocin(STZ)-induced diabetic rats. Male Sprague-Dawley rats were divided into five groups. The normal and diabetic rats were separated into four groups: the STZ-control group, the Ac group, the Ac-Se group and the Se group. Diabetes was induced in the male rats by an injection of STZ into the tail vein at a dose of 45 mg/kg. The CHCl$_3$fraction of Ac(250 mg/kg) was administered orally for 14 days. The supplementation was achieved with the AIN-93 recommended diet by adding 2 mg/kg diet of selenium as Na$_2$SeO$_3$. which was prepared freshly everyday. The body weight, hematocrit(Hct), glucose, insulin, cholesterol, HDL-cholesterol, triglyceride(TG) and free fatty acids(FFA) concentrations in plasma were measured. The aminotransferase activities were also analyzed. The changes of body weight in the experimental groups were not significantly different from that of the STZ-control group, but diabetes hyperphagia accompanied changes with body weight loss in Ac-Se group. The levels of Plasma cholesterol were not significantly different among the experimental groups. The concentrations of FFA in the Ac-Se group increased significantly compared with the STZ-control group. The effect of Se alone significantly increased aspartate aminotransferase activity and alanine aminotransferase activity. The results showed that the treatment of CHCl$_3$fraction of Ac in combination with Se has no synergistic effect. There was a tendency for the plasma glucose levels to decrease when Se was administered into diabetic rats. Supplementation of Se in diabetic rats did not elicit a significant increase in plasma insulin levels and exhibited hypotriglyceridemic effect.

• 한국식품영양학회지
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• 제18권3호
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• pp.272-278
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• 2005

돌복숭아(Prunus persica Batsch var. davidiana Max.)의 생리활성 추출물질($5.0g\%$ extract)이 streptozotocin (STZ, 55mg/kg B.W., I.P. injection)으로 유발된 당뇨성 Sprague Dawley계 수컷 흰쥐의 지질 및 당질대사 이상에 의해 야기되는 각종 질환의 예방과 개선 효과 등에 많은 생리적 효능이 있을 것으로 판단되어 본 실험을 수행하였다. 기본 식이에 물 급여군인 대조군(BW군)을 비롯한 STZ 당뇨 유발 흰쥐에 물 급여군(BSW군)과 당뇨 유발군에 돌복숭아 추출액을 급여한 군(BSP군)을5주간실험 사육하였다. 혈청 중의 전해질 농도(Na, K, Cl)는 당뇨 유발군(BSW군)에 돌복숭아 추출액을 급여(BSP군)하므로서 농도가 다소 나마 감소되는 것으로 나타났지만 유의성 있는 농도의 차이는 없었다. 한편 혈청 유리지방산 및 과산화지질 농도, creatine phosphokinase활성 등에서 돌복숭아추출액을 급여하므로서 유의적인 농도와 활성 감소를 나타내었고, 혈청 lecithin cholesterol acyltransferase(LCAT) 활성은 당뇨 유발군에 돌복숭아 추출액 급여에 의하여 상승되는 것으로 나타났다. 따라서 돌복숭아 중의 생리활성물질이 STZ으로 유발된 당뇨성 흰쥐의 당질 및 지질대사 이상 등에서 오는 각종 질환의 예방 및 치료에 개선 효과가 있을 것으로 생각된다.

• 대한한의학회지
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• 제37권2호
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• pp.62-75
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• 2016

Objectives: This study examined whether Lycii Radicis Cortex has an inhibitory effect on inflammatory response through an oxidative stress and advanced glycation endproducts (AGEs)-mediated pathway in streptozotocin (STZ)-induced type 1 diabetic rats. Methods: Lycii Radicis Cortex was orally administered to STZ-induced diabetic rats in doses of 80 or 160 mg/kg body weight/day for 2 weeks, and its effects were compared with those of diabetic control and normal rats. Results: The administration of Lycii Radicis Cortex decreased the elevated serum urea nitrogen and renal reactive oxygen species (ROS), and reduced the increased AGEs in the serum and kidney. The elevated protein expressions of nicotinamide adenine dinucleotide phosphate (NADPH) oxidase subunits in the kidney of diabetic control rats were significantly decreased after Lycii Radicis Cortex treatments. Moreover, the kidney of diabetic rats exhibited the up-regulation of receptor for AGEs (RAGE) and AGEs-related proteins; however, Lycii Radicis Cortex treatment also significantly reduced those expressions (excepted RAGE). In addition, the diabetic rats exhibited an up-regulation of the expression of proteins related to inflammation in the kidney, but Lycii Radicis Cortex administration reduced significantly the expression of the inflammatory proteins through the nuclear factor-kappa B (NF-${\kappa}B$) and activator protein-1 (AP-1) pathways. Conclusions: This study provides scientific evidence that Lycii Radicis Cortex exerts the antidiabetic effect by inhibiting the expressions of AGEs and NF-${\kappa}B$ in the STZ-induced diabetic rats.