• 생약학회지
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• 제30권2호
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• pp.216-221
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• 1999

The NAD(P)-linked $3{\alpha}-Hydroxysteroid$ $dehydrogenase(3{\alpha}-HSD)$ of rat liver cytosol is powerfully inhibited by the non-steroidal anti-inflammatory drugs in rank-order of their therapeutic potency, and this observation has now been developed into a rapid screen for predicting the potency of products that show anti-inflammatory effect. Five-plants were screened by using this method. Among them, BuOH-fraction of Mucuna birdwoodiana showed strong inhibitory effect on $3{\alpha}-HSD$, and three isoflavone compounds were isolated. Inhibitory activates of isolated compounds were compared.

• Natural Product Sciences
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• 제9권2호
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• pp.105-108
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• 2003

During our research program to find DNA strand-scission agents from higher plants, the MeOH extracts of the stems of Mucuna birdwoodiana Tutcher. (Leguminosae) exhibited the most potent activity with an $IC_{50}$ value of $4.9\;{\mu}g/ml$. Thus, detailed laboratory investigation was performed, and led to the isolation of known compounds, $({\pm})$-catechin (1) and (-)-epicatechin(2) as active principles. Compounds 1 and 2 showed significant activity of DNA strand-scission with $IC_{50}$ values of 10.8 and $7.5\;{\mu}g/ml$, respectively (positive control, bleomycin: $IC_{50}\;3.3\;{\mu}g/ml$.

• Natural Product Sciences
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• 제8권4호
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• pp.162-164
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• 2002

The methanol extracts of 42 Korean indigenous plants were evaluated for the DNA strand-scission activity. As a result, the 17 extracts were found to be active in the criteria of $IC_{50}$}<$25\;{\mu}g/ml$. Among others, the MeOH extracts of Caesalpinia sappan and Mucuna birdwoodiana showed the most potent DNA strand-scission activity with $IC_{50}$ values of 5.9 and $4.9\;{\mu}g/ml$, respectively. Therefore, the partition and fractionation for C. sappan were performed and tested in the DNA strand-scission assay system for further bioassay-guided fractionation.

• 생명과학회지
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• 제20권6호
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• pp.922-928
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• 2010

한방 생약재로부터 안전하면서도 신규의 항혈전제를 개발하기 위해, 현재 국내에서 유통되고 있는 국내 및 국외산 한방 생약재 33종을 대상으로 40종의 에탄올 추출물을 조제하고, 이들의 thrombin time (TT), prothrombin time (PT), activated partial thromboplastin time (aPTT)을 평가하였다. 생약재중 중국산은 28종으로 대부분이 국외산이었으며, 부위별로는 종자 및 뿌리 부위가 19종을 차지하였다. 평균 수분함량은 $6.85{\pm}2.26%$, 평균 추출율은 $5.27{\pm}4.25%$를 나타내었다. 조제된 시료의 TT평가 결과, 사인(중국), 고본, 팔각향, 계지, 당삼, 계혈등, 행인, 오배자, 괄루근 및 포황에서 우수한 트롬빈 저해활성을 확인하였으며, 다양한 농도에서 평가 결과 계혈등, 행인, 팔각향, 계지, 오배자 추출물 순으로 트롬빈 저해능이 강력함을 확인하였다. PT 평가 결과 오배자, 계혈등, 행인에서, aPTT 평가결과 오배자 및 계혈등에서 우수한 항혈전능을 확인하였다. 한편 추출물의 인간적혈구 용혈활성을 평가한 결과, 계혈등, 팔각향, 계지, 오배자 추출물은 $500\;{\mu}g/ml$ 농도에서도 용혈활성이 없음을 확인하여 이들 4종을 최종 선정하였다. 본 연구결과는 이미 대량생산이 확립된 한방생약제로부터 우수한 항혈전제 개발이 가능함을 제시하고 있으며, 트롬빈 및 혈장 응고 인자에 대한 특이 저해제 개발이 가능함을 제시하고 있다.

• 생약학회지
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• 제42권2호
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• pp.161-168
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• 2011

Advanced glycation end products (AGEs) has been shown to play an important role in the development of the diabetic complications. The AGEs inhibitors or cross-link breakers attenuate various functional and structural manifestations of diabetic complications. In this study, 69 China herbal medicines have been investigated with an in vitro evaluation system using AGEs inhibitory activity. Of these, 28 herbal medicines $IC_{50}$=<50 ${\mu}g/ml$) were found to have stronger AGEs inhibitory activity compared with aminoguanidine ($IC_{50}$=59.77 ${\mu}g/ml$). Particularly, 5 herbal medicines, Camptotheca acuminata (stem, leaf), Eurya groffii (stem, leaf), Cornus Capitata (leaf), Mucuna birdwoodiana (root), Nelumbo nucifera (fruit, seed) showed more potent inhibitory activity (approximately 6-27 fold) than the positive control aminoguanidine.