• 제목/요약/키워드: STZ diabetic rats

검색결과 449건 처리시간 0.024초

The combination of canagliflozin and omega-3 fatty acid ameliorates insulin resistance and cardiac biomarkers via modulation of inflammatory cytokines in type 2 diabetic rats

  • Safhi, Mohammed Mohsen;Anwer, Tarique;Khan, Gyas;Siddiqui, Rahimullah;Sivakumar, Sivagurunathan Moni;Alam, Mohammad Firoz
    • The Korean Journal of Physiology and Pharmacology
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    • 제22권5호
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    • pp.493-501
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    • 2018
  • The present study was carried out with the hypothesis that combination of canagliflozin and omega-3 fatty acid may have potential effect on insulin level, insulin resistance, cardiac biomarkers, inflammatory cytokines and histological studies in type 2 diabetes mellitus (DM). Type 2 DM was induced by injecting nicotinamide (120 mg/kg, i.p.) 15 min before STZ (60 mg/kg) injection. Canagliflozin (5 and 10 mg/kg) and omega-3 fatty acid (300 mg/kg) were given for 28 days after confirmation of diabetes. Biochemical estimations revealed elevated levels of glucose, insulin, HOMA-R and inflammatory cytokines in diabetic group. Daily dosing of alone canagliflozin and omega-3 fatty acid slightly reduced elevated levels of glucose, insulin, HOMA-R and inflammatory cytokines ($IL-1{\beta}$, IL-2, and $TNF{\alpha}$), whereas canagliflozin and omega-3 fatty acid combination has reduced these biochemical parameters significantly when compared with diabetic group. Similarly in diabetic group the levels of cardiac biomarkers such as lipid profile, LDH, CKMB and troponin were significantly increased. Elevated levels of cardiac biomarkers were significantly reduced after daily dosing of alone canagliflozin and omega-3 fatty acid. Canagliflozin and omega-3 fatty acid combination has offered better improvement in cardiac biomarkers compared to alone canagliflozin and omega-3 fatty acid. Histopathological analysis also supported the above hypothesis that combination therapy (canagliflozin and omega-3 fatty acid) offered better protection against degenerative changes in ${\beta}-cells$ of pancreas as compared to alone treatment with these drugs. Thus the present study revealed that canagliflozin and omega-3 fatty acid can be used as potential combination therapy in type 2 DM along with cardiac complication.

게르마늄 강화 송이균사체와 효모가 Streptozotocin 유발 당뇨 쥐의 혈당 및 혈청 지질에 미치는 영향 (Effects of Germanium-fortified Tricholoma matsutake Mycelium and Yeast on Blood Glucose and Serum Lipid in Streptozotocin-Induced Diabetic Rats)

  • 김완겸;김혜자;정명수;조화은;최윤희;이기남
    • 대한예방한의학회지
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    • 제13권2호
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    • pp.89-102
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    • 2009
  • Objectives : The purpose of this study was evaluated hypoglycemic effect of culture broth of germanium-fortified Tricholoma matsutake mycelium and yeast. Methods : We examined $\alpha$-glucosidase inhibitory activity, blood glucose level, concentration of serum lipid, and serum metabolic variables of Tricholoma matsutake mycelium and yeast fortified Germanium. in streptozotocin induced diabetic rat. Results : In the $\alpha$-glucosidase inhibitory activity, germanium-fortified yeast was significantly higher than germanium-fortified Tricholoma matsutake mycelium. The hypoglycemic effects of germaniumfortified Tricholoma matsutake mycelium was higher than germanium-fortified yeast. The activity of alkaline phosphatase(ALP), aspartate aminotransferase(AST) and alanine aminotransferase(ALT) was significantly lower in the germanium-fortified Tricholoma matsutake mycelium and yeast than in diabetic control(DC) group and diabetic positive control(PC) group. The concentration of total cholesterol and triglyceride of germanium-fortified yeast was significantly lower than germanium-fortified Tricholoma matsutake mycelium, DC group and PC group. Conclusions : The results suggest that germanium-fortified Tricholoma matsutake mycelium and yeast have improvement effects in blood glucose, serum lipid and liver function.

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Study on Changes in Endogenous Stem Cells in the Salivary Gland of Streptozotocin-induced Diabetic Rats

  • Jung, Bo Hyun;Lee, Hee Su;Yoo, Ki-Yeon
    • International Journal of Oral Biology
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    • 제42권3호
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    • pp.99-106
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    • 2017
  • Type1 diabetes mellitus (DM) is generally known to be caused by destruction of insulin-producing pancreatic ${\beta}$ cells or an immune-related problem. Polydipsia is a representative symptom of DM, and it has been reported that this condition is closely related to xerostomia and is considered that hyposalivation from the salivary gland results in this phenomenon. Although various studies have reported that induction of diabetes reduces endogenous stem cells in other organs (heart, brain etc.), diabetes-related changes in endogenous stem cells in the salivary gland have not yet been well established. Therefore, in this study, to verify the change in salivary gland stem cells after diabetes, salivary gland tissues in the control and diabetes-induced groups were processed by histochemistry (Masson's trichrome staining) for morphological analysis, TUNEL assay for cell death, and immunohistochemistry (Ki-67 and c-Kit) for cell proliferation and maturation. Diabetes induced by STZ leads to vacuolization, apoptosis, and reduction in proliferating cells/salivary gland stem cells in salivary glands of rats. This result suggests that diabetes may be associated with reduction in salivary gland function such as degeneration and inhibition of regeneration in the salivary gland.

FUNCTIONAL PROPERTIES OF SAENGSIK (SUBSTITUTE MEAL) FORMULATED WITH UNCOOKED CEREALS FERMENTED BY LACTIC ACID BACTERIA

  • Kim Sung Soo;Kim Kyung Tak;Hong Hee Do;Ha Tae Youl
    • 한국식품영양과학회:학술대회논문집
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    • 한국식품영양과학회 2001년도 International Symposium on Food,Nutrition and Health for 21st Century
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    • pp.170-177
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    • 2001
  • The objective of this study was to improve the qualities of Saengsik (substitute meal formulated with uncooked cereal powder) such as functionality, safety and sensory preference by using Lactic Acid Bacteria (LAB). The optimum formulation of fermented Saengsik (substitute meal) was verified as $40\%$ of fermented brown rice, $13\%$ of fermented job tears, $5\%$ of yellow soybean, $5\%$ of waxy rice, $5\%$ of sorghum, $3\%$ of Seumok bean, $1\%$ of sesame, $3\%$ of barley, $2\%$ of red bean, $5\%$ of prosomillet, $2\%$ of foxtail millet, $9%$ of black rice, $3\%$ of buckwheat, $1\%$ of chestnut, $2\%$ of pumpkin, $3\%$ of peanut. Fermented Saengsik decreased significantly serum glucose in STZ-induced diabetic rats. However, serum lipid levels were not affected by fermented Saengsik. In rats fed with high-fat diet, serum triglyceride level was slightly decreased and the contents of liver triglyceride were significantly decreased by supplementation of fermented Saengsik.

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동충하초(Cordyceps militaris)가 당뇨의 혈당 및 동맥경화 개선에 미치는 영향 (Effects of Cordyceps Militaris on the Improvement Actions of Blood Glucose and Atherosclerosis in Diabetes)

  • 김한수;김민아;장성호;강동수;이원기;류재용;이춘식
    • 한국환경과학회지
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    • 제22권3호
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    • pp.341-346
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    • 2013
  • The purpose of this study was to assess the effects of Cordyceps militaris extract supplementation on the improvement of blood glucose, lipid compositions and hepatic functional enzyme activities in the serum of streptozotocin(STZ, 50 mg/kg BW, IP injection)-induced diabetic rats fed the experimental diets for 5 weeks. The concentrations of blood glucose and lipid compositions(total cholesterol, ${\beta}$-lipoprotein, free cholesterol, cholesteryl ester, triglyceride and phospholipid) and atherosclerotic index in serum were significantly lower in the DM+CM group than in the DM group, whereas the ratio of HDL-cholesterol concentration to total cholesterol in the DM+CM group were higher than in the DM group. The activities of hepatic functional enzymes(aminotransferase, LDH and ALP) in serum were lower in the Cordyceps militaris extract administration group(group DM+CM) than in the hyperglycemic DM group. The results shown above suggested that Cordyceps militaris extract supplementation effectively improves blood glucose and atherosclerosis in the serum of diabetic rats.

Water Chestnut (Trapa japonica Flerov.) Exerts Inhibitory Effect on Postprandial Glycemic Response in Rats and Free Radical Scavenging Activity in vitro

  • Kang, Ming-Jung;Lee, Soo-Kyung;Song, Ji-Hyun;Kim, Mi-Eun;Kim, Myo-Jeong;Jang, Joung-Soon;Lee, Jai-Hyun;Kim, Jung-In
    • Food Science and Biotechnology
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    • 제18권3호
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    • pp.808-812
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    • 2009
  • The ${\alpha}-glucosidase$ inhibitory and antioxidant effects of water chestnut (Trapa japonica Flerov.) were assessed to explore its possible use as an anti-diabetic agent. Methanol extracts of the fruit shell and meat of water chestnut were assayed for inhibitory activity against yeast ${\alpha}-glucosidase$ and 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical scavenging activity. Effect of fruit shell extract on postprandial glucose response was assessed. Compared with fruit meat, shell extract showed stronger inhibition against ${\alpha}-glucosidase$ with an $IC_{50}$ of 273 ${\mu}g/mL$. Oral administration of fruit shell extract (500 mg/kg) significantly lowered the postprandial area under the glucose response curve to starch (1 g/kg) in streptozotocin (STZ)-induced diabetic rats (p<0.01). Compared with fruit meat, shell extract showed stronger scavenging activity against DPPH, with an $IC_{50}$ of 27.1 ${\mu}g/mL$. The results indicate that the fruit shell of water chestnut was effective in controlling postprandial hyperglycemia and exerted an antioxidant effect. Therefore, water chestnut may be useful in treating diabetes.

마취된 당뇨 흰쥐의 신혈류량 감소에 관여하는 기전 : 내인성 쓰롬복산계의 무관성 (Blockade of Thromboxane Influences Does Not Affect Renal Blood Flow Deficit in Anesthetized Diabetic Rats)

  • 하헌주;얼웨인던함
    • 대한약리학회지
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    • 제24권2호
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    • pp.221-232
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    • 1988
  • 본 연구는 스트렙토조토신 투여에의해 유도된 인슐린 의존적 당뇨 흰쥐에서 관찰되는 신혈류량의 감소가 내인성 혈관 수축계의 하나인 쓰롬복산의 영향이 증가된 때문인지를 규명하고자 하였다. 펜토바비탈을 이용하여 마취를 유도한 후 주어진 시간동안 아무런 약리학적 자극이 없는 상태에서 신동맥의 헐류량 (ml $min^{-1}$ $gKw^{-1})$, 혈압 (mm Hg) 및 그때의 신동맥 저항 (혈압/신동맥의 혈류량)을 관찰하였다. 그 각각에 대응하는 값은 당뇨쥐에서는 $5.9{\pm}0.3$(P<0.01, 대조군과 비교), $115{\pm}3$$20.3{\pm}1.0$(P<0.01, 대조군과 비교)이었고, 연령 대조군에서는 각각 $8.4{\pm}0.4$, $123{\pm}3$$15.1{\pm}0.8$이었다. 스트렙토조토신에 의한 고혈당 유도를 방지한다고 알려진 3-O-메칠 글루코즈로 진처리한 후에 스트렙토조토신을 투여한 흰쥐에서 관찰되는 혈압 및 신동맥의 혈류량은 연령 대조군의 값과 동일하였다. 신동맥이 확장될 수 있음이 확인된 상태에서, 쓰롬복산의 합성을 저해할 수 있는 용량의 OKY-1581(1 mg/kg, i.v.에 뒤이은 0.4mg/kg min 지속적 투여)는 대조군 (n=4)뿐 아니라 실험군(n=4) 흰쥐의 혈압, 신혈류량 및 신동맥의 저항을 변화시키지 많았다. 마찬가지로 쓰롬복산/프로스타글란딘 엔도펄옥사이드 효현제인 U46619에 의한 신동맥 수축을 저해할 수 있는 용량의 쓰롬복산 수용체에대한 길항제인 SQ29548(100 ng/m1 신혈류량)을 신동맥으로 투여했을 때에도, 관찰되는 신혈류역학에 아무런 변화가 없었다(n=8 각 군). OKY-1581 투여후에 사이클로옥시게나아제의 활성을 저해하는 약물인 인도메타신(2 mg/kg)을투여했을 때에도 관찰되는 신동맥의 저항은 대조군에서 뿐만 아니라 실험군인 당뇨쥐에서도 변화가 없었다. 따라서 본 연구 결과는 스트렙토조토신 투여후 관찰되는 신동맥의 저항 증가는 약물의 신장에대한 직접적인 독성이 아닌, 유도된 당뇨에 기인함을 제시하였고, 이러한 신동맥 저항 증가는 고조된 내인성 혈관 수축계의 하나인 쓰롬복산의 영향이 아님을 시사하고 있다.

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뽕잎 및 꾸지뽕잎 첨가식이가 Streptozotocin 유발 당뇨쥐의 혈당관련 바이오마커에 미치는 영향 (Effect of Diets with Mulberry Leaf and Cudrania tricuspidata Leaf Powder Supplements on Blood Glucose-Related Biomarkers in Streptozotocin-Induced Diabetic Rats)

  • 박주헌;이경원;성기승;김성수;조경동;이복희;한찬규
    • 한국식품영양과학회지
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    • 제41권6호
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    • pp.766-773
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    • 2012
  • 뽕잎 및 꾸지뽕잎이 당뇨쥐의 혈당관련 바이오마커(biomarkers)에 미치는 영향을 조사하고자 SD계 수컷 흰쥐에게 STZ 투여(47.5 mg/kg bw) 후 7일 뒤 혈당치가 350 mg/dL 내외되는 쥐를 선별하여 실험군당 8마리씩 배치하고, AIN-93G를 기본식이로 하여 뽕잎 10% 첨가군(A), 뽕잎 10%와 꾸지뽕잎 10%(B) 및 30%(C) 혼합 첨가군, 꾸지뽕잎 10% 첨가군(D), 당뇨대조군(E)으로 나누어 각 실험식이를 6주간 급여한 결과는 다음과 같다. 실험기간 동안 B군과 C군의 혈당치는 실험식이 급여 전 기준혈당치와 비슷한 수준을 유지하였고 실험 6주째의 경우 E군 및 A, D군에 비해 유의하게 낮았다(p<0.05). 기준혈당 대비 6주 후 혈당상승률은 B군과 C군이 각각 6.7, 7.6%로 E군(29.2%)에 비해 상대적으로 낮았으며, 6주간 혈당치의 곡선하면적(AUC)도 B, C군이 D, E군보다 유의하게 낮았다(p<0.05). 실험종료 후 공복혈당 역시 B, C군이 D, E군에 비해 통계적으로 유의하게 낮았고(p<0.05), C-peptide 함량은 C군이 다른 군에 비해 평균 50 pmol/L 가량 높았으나 유의적인 차이는 없었으며, 당화혈색소(HbA1c) 함량은 A군과 B군이 E군보다 유의하게 낮았다(p<0.05). 혈청 총콜레스테롤(TC) 농도는 E군에 비해 실험시료 급여군이 평균 14% 감소하였고, HDL-콜레스테롤 농도는 시료 처리군이 E군보다 평균 27% 증가하였으나 실험군 간에 유의적인 차이는 없었으며, 중성지방(TG) 농도는 E군에 비해 A, B, D군에서 유의적으로 감소하였다(p<0.05). 간기능치 중 AST 및 ALT 활성은 E군보다 A, B, D군에서 통계적으로 유의하게 감소하였다(p<0.05). 이상의 결과에서 뽕잎 및 꾸지뽕잎 첨가식이 중 이들을 1:1로 혼합하여 STZ로 유도한 당뇨쥐에게 급여하였을 때 혈당상승을 억제하고 혈당관련 지표성분, 그리고 혈청 지질농도 및 간기능치 개선에도 다소간의 효과를 확인할 수 있었다.

대두 chiro-inositol의 혈당강하효과 (Effect of chiro-inositol from Soybean on Reducing Hyperglycemia and Its Role for Nutraceutic Supplement for Insulin Resistance)

  • 홍용근;박윤배
    • 생명과학회지
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    • 제15권2호
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    • pp.197-201
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    • 2005
  • 본 연구는 혈당강하효과를 갖는 chiro-inositol을 다량 함유하고 있는 식품이나 식용물질을 탐색하여 선발하고, 선택된 식품이나 식용물질에서 chiro-inositol을 분리$ {\cdot}$정제하여 정제된 chiro-inositol로 동물실험을 실시하여 혈당강하효과를 증명하였다. 약 300여종의 식품 및 식용물질을 HPLC로 분석한 결과 식품으로 안전한 대두 부산물인 탈지대두와 두부 순물에서 chiro-inositol의 함량이 각각 6.75 mg/g, 20mg/kg로 조사되어 선택되었고, chiro-inositol의 순도가 $90\%$ 이상(w/w)인 chiro-inositol의 추출물을 이용하여 동물실험을 통한 혈당강하효과를 조사하였다. 그 결과, STZ로 유발된 고혈당 쥐에 경구 투여시, 약 $40\%$의 강한 혈당강하 효과를 나타내었으며 지속시간은 약 12시간이었고, 인슐린과 복합처리 했을 때 상승작용(synergy)을 나타내었으며, 저혈당증으로 전혀 발전되지 않았다.

Streptozotocin 유발 당뇨쥐에 있어서 콩나물 메탄올 추출물의 헐당강하효과 (Hypoglycemic Effect of the Methanol Extract of Soybean Sprout in Streptozotocin-Induced Diabetic Rats)

  • 김정인;강민정;배세연
    • 한국식품영양과학회지
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    • 제32권6호
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    • pp.921-925
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    • 2003
  • 콩나물 메탄을 추출물의 yeast $\alpha$-glucosidase 저해활성을 in vitro에서 측정한 결과 5 mg/mL 농도에서 24.5%로 나타났다. 콩나물 용매분획 중 ethyl acetate층에서 $\alpha$-glucosidase 저해활성이 36.3%로 가장 높게 나타났다. STZ로 당뇨를 유발한 흰쥐에 있어서 콩나물 추출물의 탄수화물 소화효소 저해활성을 측정하였다. 공복상태의 동물에게 전분(1 g/kg)과 함께 콩나물 메탄올 추출물 (500 mg/kg)을 경구 투여한 경우, 전분(1 g/kg)만 투여 경우에 비해 투여 후 60, 90, 120, 180분에 혈당 증가가 유의적으로 낮았으며 (p<0.05), 식후 혈당 증가곡선의 면적(AUC)도 유의적으로 작게 나타났다(p<0.05). 이상의 결과에서 콩나물 메탄올 추출물은 $\alpha$-glucosidase 저해 활성에 의해 식후 혈당 조절 효과를 나타내어, 콩나물의 섭취는 당뇨병 치료 및 예방에 도움을 줄 수 있는 것으로 사료된다.