Korean Journal of Pharmacognosy (생약학회지)

The Korean Society of Pharmacognosy (한국생약학회)
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Effects of Herbal Complex on Blood Glucose in Streptozotocin-induced Diabetic Rats and in Mice Model of Metabolic Syndrome

생약복합제의 Streptozotocin 유발 당뇨 및 대사성증후군 모델 동물에서의 혈당에 미치는 효과

  • Published : 2009.09.30
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Abstract

This study was carried out to investigate the in vivo and in vitro inhibitory effect of a traditional herbal complex (HC) extract prepared from a mixture of four oriental herbs (Dioscorea Rhizoma, Glycine soja Sieb. et Zucc, Bombycis corpus, Fermented Glycine soja) that have been widely used for the treatment and prevention of diabetes mellitus on hyperglycemia. The water extract of HC showed potent inhibitory effect on $\alpha$-glucosidase with $IC_{50}$ value of 1.24 mg/mL. Additionally, the ethanol extract of HC was also found to exhibit significant inhibitory effect against protein tyrosine phosphatase $1{\beta}$ ($PTP1{\beta}$), which is known as a major regulator of both insulin and leptin signaling. In the $PTP1{\beta}$ inhibitory assay, the most active n-hexane fraction obtained from the ethanol extract of HC, was identified as a mixture of fatty acid derivatives by gas chromatography-mass spectrometry (GC-MS). In high-fat diet-low dose streptozotocin (STZ)-induced diabetic rat, the water extract of HC improved the oral glucose intolerance as compared with rosiglitazone. HC also caused a marked decrease of body weight and fasting blood glucose and a significant improvement on glucose tolerance in metabolic syndrome mice model. These findings support that this traditional HC may be useful in the control of blood glucose in diabetes mellitus and metabolic syndrome.

당뇨병 치료 및 예방에 전통적으로 사용되어온 생약 및 식품 소재로 구성된 생약복합제인 백강잠, 산약, 쥐눈이콩, 청국장가루의 복합물을 대상으로 실험관 및 동물실험을 통하여 혈당강하 효과를 확인하였다. 생약복합제 $H_2O$추출물은 당흡수에 관여하는 $\alpha$-glucosidase효소를 비교약물인 acarbose ($IC_{50}$=0.39 mg/mL)과 비교하여 1/3배 정도의 활성을 보였으며 ($IC_{50}$=1.24 mg/mL), ethanol추출물은 인슐린 내성에 관여하는 $PTP1{\beta}$ 효소작용을 ($IC_{50}=498.46{\mu}g$/mL) 효과적으로 억제하였다. $PTP1{\beta}$ 효소를 억제하는 n-hexane 분획을 대상으로 하여 GC-MS로 성분 분석한 결과 지방산유도체인 것으로 나타났다. 고지방식이와 저용량 STZ (35 mg/kg)으로 유발시킨 당뇨모델에서 OGTT 실험결과 비교약물인 rosiglitazone(당부하 30분 후 평균 60 mg/dL 의 감소)과 생약복합제 투여군의 경구 당부하능 개선효과를(당부하 30분 후 평균 30 mg/dL의 감소) 확인하였다. 또한, 대사성 증후군 모델에서는 체중증가의 감소 효과와 공복혈당의 증가를 현저히 억제함을 확인하였으며, OGTT에서도 후반부에 현저한 경구당부하능 개선 효과를 관찰 할 수 있었다. 이 결과를 바탕으로 산약, 백강잠, 쥐눈이콩, 청국장으로 조제한 생약복합제는 당뇨 및 대사성 증후군의 혈당을 조절하는 데 도움을 줄 수 있을 것이라 판단된다.

Keywords

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