• 대한한방내과학회지
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• 제42권4호
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• pp.605-621
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• 2021

Objectives: The purpose of this review is to assess the efficacy and safety of Hwangryunhaedok-tang for type 2 diabetes without complications by systemic review and meta-analysis of randomized controlled trials (RCTs). Methods: We searched the following up to March 31. 2021: PubMed, EMBASE, The Cochrane Library, CNKI, CiNii, KISS, KMBASE, OASIS, ScienceON. Data extraction and assessment of Cochrane's risk of bias (RoB) tool were performed by two independent authors, and if there was disagreement between two researchers, it was resolved through the intervention of a third researcher. Results: A total of seven trials are included in this systemic review. The treatment group (Hwangryunhaedok-tang plus conventional treatment) showed more statistically significant effects than did the control group (conventional treatment only) in fasting plasma glucose level, 2-hour postprandial plasma glucose level, glycated hemoglobin A1c, fasting insulin level, and HOMA-IR. There was no significant difference between the treatment group (Hwangryunhaedok-tang alone) and the control group (metformin alone). Conclusion: Hwangryunhaedok-tang might have efficacy and safety in controlling blood sugar level and improving insulin-resistance. However, the number of studies included in the meta-analysis was insufficient, and the Hwangryunhaedok-tang used in the included studies was not standardized. Also, the quality of the involved studies was generally low. Therefore, further studies are needed to determine the efficacy and safety of Hwangryunhaedok-tang treatment for type 2 diabetes mellitus.

• 대한한방내과학회지
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• 제43권1호
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• pp.22-40
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• 2022

Objectives: The purpose of this study is to assess the antidiabetic effect and safety of Galgunhwangryunhwanggum-tang for type 2 diabetes without complications by analyzing related research. Methods: For a systematic review and meta-analysis, we searched for the antidiabetic effect and safety of Galgunhwangryunhwanggum-tang for type 2 diabetes without complications in 10 databases up to September 2021. Only randomized controlled trials were chosen. Results: In the treatment effectiveness analysis and meta-analysis, Galgunhwangryunhwanggum-tang had significant improvement effects on fasting plasma glucose level, 2-hour postprandial glucose level, glycated hemoglobin, fasting insulin, and homeostasis model assessment for insulin resistance compared to the control group when treated in parallel with oral glycemic drugs. Conclusion: Galgunhwangryunhwanggum-tang is effective in improving blood sugar and insulin resistance in type 2 diabetes patients without complications and can especially be considered in parallel treatment with oral hypoglycemic drugs. A large-scale randomized controlled clinical trial is required to complement the limitations presented in this study in the future.

• The Korean Journal of Physiology and Pharmacology
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• 제26권2호
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• pp.95-111
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• 2022

Chronic obstructive pulmonary disease (COPD) is an important healthcare problem worldwide. Often, glucocorticoid (GC) resistance develops during COPD treatment. As a classic hypoglycemic drug, metformin (MET) can be used as a treatment strategy for COPD due to its anti-inflammatory and antioxidant effects, but its specific mechanism of action is not known. We aimed to clarify the role of MET on COPD and cigarette smoke extract (CSE)-induced GC resistance. Through establishment of a COPD model in rats, we found that MET could improve lung function, reduce pathological injury, as well as reduce the level of inflammation and oxidative stress in COPD, and upregulate expression of nuclear factor E2-related factor 2 (Nrf2), heme oxygenase-1 (HO-1), multidrug resistance protein 1 (MRP1), and histone deacetylase 2 (HDAC2). By establishing a model of GC resistance in human bronchial epithelial cells stimulated by CSE, we found that MET reduced secretion of interleukin-8, and could upregulate expression of Nrf2, HO-1, MRP1, and HDAC2. MET could also increase the inhibition of MRP1 efflux by MK571 significantly, and increase expression of HDAC2 mRNA and protein. In conclusion, MET may upregulate MRP1 expression by activating the Nrf2/HO-1 signaling pathway, and then regulate expression of HDAC2 protein to reduce GC resistance.

• 한국식품과학회지
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• 제42권3호
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• pp.343-349
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• 2010

본 실험에서 엉겅퀴의 잎과 뿌리 분말을 당뇨 유발 흰쥐에게 4주간 섭취시킨 후, 당질과 지질을 분석하여 다음과 같은 결론을 얻었다. 평균 식이섭취량은 당뇨대조군에 비해 엉겅퀴-잎섭취군에서 유의적으로 감소하였다. 모든 엉겅퀴섭취군의 경우 유의적 차이는 없지만 당뇨대조군보다 높은 체중증가량과 식이이용효율을 나타내었다. 이로써 엉겅퀴섭취가 당뇨유발로 인한 체중감소와 식이이용효율감소 억제에 효과가 있음을 알 수 있었다. 신장의 무게가 엉겅퀴-잎섭취군의 경우 당뇨대조군보다 유의적으로 가볍게 나타났다. 폐, 비장, 췌장, 심장 및 뇌의 무게는 당뇨대조군과 엉겅퀴섭취군 비교시 유의적인 차이를 보이지 않았다. 헤마토크릿치는 당뇨대조군과 비교하여 엉겅퀴의 잎을 먹인 쥐에서 유의적으로 낮아졌으며 정상군의 수준과 비슷해지는 효과를 보여주었다. 당뇨 유발시 ALT 활성도는 증가함을 나타내었고 엉겅퀴 잎을 먹인 쥐에서 유의적인 차이가 없었지만 당뇨대조군에 비하여 적게 증가하였다. 혈장의 포도당 수준은 모든 엉겅퀴섭취군이 당뇨대조군에 비하여 혈당 증가폭이 감소하는 경향을 나타내었고 특히 엉겅퀴-잎섭취군에서는 실험 2주째부터 실험 4주째까지 당뇨대조군에 비해 유의적으로 낮은 혈당 수준을 나타내었다. 간의 글리코겐 함량은 당뇨대조군에 비해 모든 엉겅퀴섭취군에서 증가하였으나 유의적인 차이가 없었다. 혈장 콜레스테롤 함량은 당뇨대조군과 당뇨실험군 사이에는 유의적인 차이를 나타내지 않았다. HDL-콜레스테롤 함량은 모든 엉겅퀴 섭취군에서 증가하는 경향으로 나타났다. 혈장 중성지방함량은 엉겅퀴-뿌리섭취군에서, 유리지방산의 함량은 잎섭취군에서 약간 감소하는 경향이었으나 유의적인 차이는 보이지 않았다. 따라서 본 실험에서는 당뇨 유발시 초래되는 당질대사 이상을 관찰하기 위하여 엉겅퀴의 잎과 뿌리를 당뇨 유발 흰쥐에게 섭취시킨 결과, 당뇨 흰쥐에서 신장과 체중의 정상화, 당뇨의 혈당 증가 완화를 확인하였기에 당질대사에 있어서 항당뇨효능이 있음을 알 수 있었다. 또한 당뇨대사 이상으로 영향을 미치는 지질대사도 관찰한 결과, 유의적인 차이는 없지만 약간의 효능이 있음을 확인할 수 있었다. 이상의 결과로 엉겅퀴는 잎뿐만 아니라 뿌리도 잠재적 의약품 소재 및 기능성 식품소재로서의 있다고 판단된다.

• Journal of Nutrition and Health
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• 제37권4호
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• pp.259-265
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• 2004

본 연구는 220 g 내외의 Sprague-Dawley계 수컷 흰쥐를 이용하여 정상군, 당뇨대조군, 동과 종자 2.5% 섭취군 및 동과 종자 5.0% 섭취군으로 구분하여 실험하였다. 동과 종자의 첨가량을 각각 2.5%와 5.0%로 달리하여 4주 동안 섭취시킨 후 혈장 중의 포도당과 지질함량에 미치는 영향을 검토하였다. 당뇨대조군에 비해 동과 종자 5.0%를 섭취한 군에서는 4주 후의 체중이 초기에 비하여 7.4% 증가함을 볼 수 있었다. 혈당 수준은 실험 1주째부터 당뇨대조군에 비해 당뇨실험군이 유의적으로 감소하기 시작하여 실험 4주 후에는 유의적으로 감소되었다. 혈장 콜레스테롤 수준은 동과 종자 5.0%를 섭취한 군에서 실험 1주째부터 유의적으로 낮아지기 시작하여 실험 4주째까지 그 수준을 유지하였다. 혈장 중의 HDL -cholesterol, 중성지방 및 유리지방산 수준은 정상군에 비해 당뇨대조군에서 유의적으로 높게 나타났고, 혈장 중성지방 수준에서는 당뇨대조군에 비해 종자 2.5% 섭취군에서 유의적으로 낮게 나타났다. AST 활성도는 정상군과 당뇨유발군간의 유의적인 차이가 나타나지 않았고, ALT 활성도는 정상군에 비해 당뇨대조군에서 유의적으로 높게 나타났다. 이상의 실험결과 동과 종자 2.5%와 5.0%의 섭취가 streptozotocin 유발 당뇨 쥐에서 혈당강하 효과를 보였을 뿐만 아니라 2.5% 섭취에서는 지질함량을 저하시키는 효과도 있는 것으로 보여졌다.

• Journal of Nutrition and Health
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• 제40권3호
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• pp.199-210
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• 2007

The aim of this study was to investigate the effects of mulberry juice and cake powder on blood glucose and lipid status along with intestinal disaccharidase and erythrocyte antioxidative enzyme system in streptozotocin (STZ)-induced diabetic rats. Sprague-Dawley male rats weighing $100{\pm}10g$ were randomly assigned to one normal group, and eight STZ-induced diabetic groups: control diet group without mulberry juice and cake powders (DM-C), three mulberry juice powder groups (0.5%: DM-0.5J, 1%: DM-1J, 2%: DM-2J) and low mulberry cake powder groups (0.25%: DM-0.25C, 0.5%: DM-0.5C, 1%: DM-1 C, 2%: DM-2C). After three-week feeding of each experimental diet, diabetes was induced by intravenous injection of 50 mg/kg body weight of STZ in sodium citrate buffer (pH 4.3) via tail vein of eight DM groups. Rats were sacrificed at the 9th day of diabetic states. Level of blood glucose was 505 mg/dl in DM-C group but it was 28% and 39% lower in mulberry juice and cake powder fed groups, respectively, than the DM-C group. Activities of maltase, sucrase and lactase in proximal part of small intestine were significantly lower in the mulberry juice and cake powder groups by $42{\sim}47%$ than those of DM-C group. Erythrocytic superoxide dismutase, glutathione peroxidase and catalase activities were significantly reduced by STZ but increased close to normal levels along with less accumulation of thiobarbituric acid reactive substances (TBARS). Serum levels of triglyceride and total cholesterol and HDL-cholesterol by STZ-DM were reduced and increased respectively, to the norma] levels by the mulberry juice and cake powder. Except the levels of TBARS, the effects on the other measurements by the various dietary levels of mulberry juice and cake powder were almost same and the effect of the cake powder was most significant at the lowest level. These results indicate that mulberry juice and cake powders have consityerable hypoglycemic effect and strengthening antioxidant defense systems at the low levels in diabetic state and may be able to reduce diabetic complications.

• Journal of Nutrition and Health
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• 제38권10호
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• pp.801-806
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• 2005

본 연구는 streptozotocin으로 유발된 당뇨 흰쥐에게 동과에서 추출한 각 용매분획물을 14일간 경구투여한 후 혈당과 지질함량을 분석하였으며 다음과 같은 결론을 얻었다. 당뇨대조군과 비교시 실험 14일 후 당뇨실험군에서 체중감소가 낮아졌으며, 실험 10일째부터는 당뇨실험군에서 혈당 수준이 당뇨대조군보다 감소하는 경향을 보이었다. 특히 $CHCl_3$분획물 투여군과 $H_2O$분획물 투여군은 14일째에 유의적으로 낮은 수준을 나타내었다. 당뇨실험군은 혈장 유리지방산 수준에서도 당뇨대조군에 비해 낮은 수준이었으며 $CHCl_{3}$분획물 투여군은 혈장 중성지방 수준에서도 낮게 나타났으나 유의적인 차이는 보이지 않았다. ALT와 AST 활성도는 당뇨대조군에 비해 $H_2O$분획물 투여군에서 유의적으로 낮게 나타났다. 결론적으로 당뇨 유발 흰쥐에게 $CHCl_3$분획물의 투여가 실험적 당뇨에 대하여 체중의 감소를 둔화시키며 특히 혈장 중 포도당의 함량을 유의성있게 감소시키는 것으로 보아 당뇨병에 대한 개선효과가 있다고 사료된다.

• 대한약리학회지
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• 제24권1호
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• pp.125-134
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• 1988

창출(Atractylodis Rhizoma)은 예로부터 건위목적으로 사용되어 온 생약중의 하나로서 실험동물에서는 혈당강하 작용이 있다고 알려져 있다. 그러므로 본 실험에서는 정상 및 streptozotocin(SZ)으로 고혈당을 유발시킨 흰쥐를 사용하여 Atractylodes chinensis의 수용성 추출물이 혈당에 미치는 영향을 단기간 관찰하여 다음과 같은 결과를 얻었다. 1. 정상 흰쥐에 창출의 수용성 추출물을 투여한 후 혈당치에는 영향을 미치지 않았으나 혈청cholesterol치는 일시적인 감소를 나타내었다. 2. SZ로 고혈당을 유발시킨 흰쥐에 창출의 수용성 추출물을 투여한 후 1일, 3일 및 8일째는 용량 비례적으로 유의하게 혈당감소 및 혈중 insulin 농도의 증가를 나타내었다. 3. SZ 투여로 인한 cholesterol수준의 증가는 창출의 수용성 추출물을 투여한 후 1일, 3일 및8일째 억제되었으며, 8일째 감소되었던 혈청 amylase 활성도는 추출물 투여 후 정상 수준에 가깝게 회복되었다. 4. 24시간 뇨량 변화에서는 창출의 수용성 추출물 투여 후 1일 및 3일째 유의한 뇨량 감소를 나타내었고, 뇨당변화에서는 3일 및 8일째 혈당 감소와 비례하여 유의한 뇨당 감소를 보여 주었다. 5. SZ 투여로 인한 간장내 glycogen 함량의 감소 및 glucose-6-phosphatase 활성의 증가는 창출의 수응성추출물 투여로 정상수준에 가깝게 회복되었다. 이상의 결과들을 종합하면 창출의 수용성추출물은 정상 흰쥐의 당대사에는 영향을 미치지 않는 것으로 여겨지며, SZ로 고혈당을 유발시킨 흰쥐에 있어서는 혈당 조절의 중심적 역할을 하는 insulin 홀몬의 분비를 증가시켜 당대사를 촉진시킴으로서 혈당 강하 효과를 나타내었을 것으로 사료된다.

• The Korean Journal of Physiology and Pharmacology
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• 제21권5호
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• pp.475-485
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• 2017

The present study aimed to explore the neuroprotective effect and possible mechanisms of rhGLP-1 (7-36) against transient ischemia/reperfusion injuries induced by middle cerebral artery occlusion (MCAO) in type 2 diabetic rats. First, diabetic rats were established by a combination of a high-fat diet and low-dose streptozotocin (STZ) (30 mg/kg, intraperitoneally). Second, they were subjected to MCAO for 2 h, then treated with rhGLP-1 (7-36) (10, 20, $40{\mu}g/kg$ i.p.) at the same time of reperfusion. In the following 3 days, they were injected with rhGLP-1 (7-36) at the same dose and route for three times each day. After 72 h, hypoglycemic effects were assessed by blood glucose changes, and neuroprotective effects were evaluated by neurological deficits, infarct volume and histomorphology. Mechanisms were investigated by detecting the distribution and expression of the nuclear factor erythroid-derived factor 2 related factor 2 (Nrf2) in ischemic brain tissue, the levels of phospho-PI3 kinase (PI3K)/PI3K ratio and heme-oxygenase-1 (HO-l), as well as the activities of superoxide dismutase (SOD) and the contents of malondialdehyde (MDA). Our results showed that rhGLP-1 (7-36) significantly reduced blood glucose and infarction volume, alleviated neurological deficits, enhanced the density of surviving neurons and vascular proliferation. The nuclear positive cells ratio and expression of Nrf2, the levels of P-PI3K/PI3K ratio and HO-l increased, the activities of SOD increased and the contents of MDA decreased. The current results indicated the protective effect of rhGLP-1 (7-36) in diabetic rats following MCAO/R that may be concerned with reducing blood glucose, up-regulating expression of Nrf2/HO-1 and increasing the activities of SOD.

• Nutrition Research and Practice
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• 제1권4호
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• pp.371-375
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• 2007

To control blood glucose level as close to normal is a major goal of treatment of diabetes mellitus. Hyperglycemia and hyperlipidemia are the major risk factors for cardiovascular complications, the major cause of immature death among the patients with type 2 diabetes. The purpose of this study is to determine the hypoglycemic and hypolipidemic effects of Salicornia herbacea in animal model of type 2 diabetes and to investigate the possible mechanisms for the beneficial effects of S. herbacea. S. herbacea was extracted with 70% ethanol and desalted with 100% ethanol. Three week-old db/db mice (C57BL/KsJ, n=16) were fed AIN-93G semipurified diet or diet containing 1% desalted ethanol extract of S. herbacea for 6 weeks after 1 week of adaptation. Fasting plasma glucose, triglyceride, and total cholesterol were measured by enzymatic methods and blood glycated hemoglobin ($HbA_{1C}$) by the chromatographic method. Body weight and food intake of S. herbacea group were not significantly different from those of the control group. Fasting plasma glucose and blood glycated hemoglobin levels tended to be lowered by S. herbacea treatment. Consumption of S. herbacea extract significantly decreased plasma triglyceride and cholesterol levels (p<0.05). The inhibition of S. herbacea extract against yeast ${\alpha}$-glucosidase was 31.9% of that of acarbose at the concentration of 0.5 mg/mL in vitro. The inhibitory activity of ethanol extract of S. herbacea against porcine pancreatic lipase was 59.0% of that of orlistat at the concentration of 0.25 mg/mL in vitro. Thus, these results suggest that S. herbacea could be effective in controlling hyperlipidemia by inhibition of pancreatic lipase in animal model of type 2 diabetes.