Bioactivity of an Extract of Lespedezea Cuneata G. Don to Rabbit Corpus Cavernosum Smooth Muscle Tone

야관문(Lespedezea cuneata G. Don) 추출물이 토끼 음경해면체 평활근에 미치는 생리활성

The extracts in n-hexane layer from Lespedezea cuneata G. Don exelled at sexual activity according to in vitro experiment using biopsy of rabbit corpus cavernosum to investigate effects on sexual function. The extracts were injected into 9 samples at $10{\mu}l$. The lowest relaxation was showed at sample C, $4.8{\pm}1.4%$ and the highest relaxation was showed at sample A, $20.2{\pm}6.0%$. The relaxation by every sample, except sample C and G-1, were higher than by $10^{-7}M$ ACh, $7.8{\pm}5.1%$, and their effects were above 10%. Also, the extracts were injected into 9 samples at $15{\mu}l$. The lowest relaxation was showed at sample C, $15.4{\pm}9.7%$ and the highest relaxation was showed at sample J, $54.8{\pm}9.7%$. The relaxation by sample A and D was as much as by $10^{-6}M$ ACh, $28.0{\pm}20.1%$. The relaxation by sample H was $41.9{\pm}7.3%$. The relaxation by sample J was $54.8{\pm}9.7%$ and it was higher than by $10^{-5}M$ ACh, $53.9{\pm}25.9%$. Also, the extracts were injected into 9 samples at $20{\mu}l$. The lowest relaxation was showed at sample E, $28.9{\pm}0.6%$ and it was a little higher than by $10^{-6}M$ ACh. The relaxation by sample G was as much as by $10^{-5}M$ ACh. The two higher relaxation were showed at sample H, $99.4{\pm}16.0%$ and J, $95.7{\pm}7.2%$, and their relaxation against contraction reaction by PhE were near 100%. Experiment by sample I was not performed for lack of sample amount.

야관문에서 추출한 n-hexane층을 음경해면체 평활근의 활성물질 탐색한 결과 극성 별로 분리한 9개 모든 시료에서 정도의 차이는 있으나 음경해면체 평활근의 이완 반응을 일으켰으며, 추출물 $10{\mu}l$ 투여한 9개 시료 중 A시료($20.2{\pm}6.0%$) 가 최고의 이완 반응을 보였으며, $15{\mu}l$를 투여한 시료 중에서는 J시료($54.8{\pm}9.7%$)가 최고의 이완 반응이 나타났다. 한편 야관문 추출물의 농도를 제일 많은량 $20{\mu}l$를 투여한 시료들 중에서는 H시료와 J시료가 95% 이상의 높은 이완 반응을 보였다. 시료중 최고 활성을 나타난 시료 H를 prep-HPLC 및 분석용 HPLC를 이용, YK-H1, YK-H2, YK-H3 및 YK-H4등 4개의 물질을 분리하였으며, 또한 시료 J를 prep-HPLC 및 분석용 HPLC를 이용하여 YK-J1, YK-J3 및 YK-J4등 세 개의 물질을 분리하였다. 분리된 7개의 물질들의 구조 결정에 대한 연구를 진행하고 있다.