Matrix solid-phase dispersion（MSPD） was developed for the extraction of four alkaloids, including aconitine, mesaconitine, hypaconitine and deoxyaconitine, from the roots ofAconitum kusnezoffii Reichb. The determina...Matrix solid-phase dispersion（MSPD） was developed for the extraction of four alkaloids, including aconitine, mesaconitine, hypaconitine and deoxyaconitine, from the roots ofAconitum kusnezoffii Reichb. The determination of the analyte was carried out by high performance liquid chromatography with UV detection. The alkaline alumina was used as sorbent. The mixture of acetonitrile and water was used as elution solvent. Several extraction parameters, such as type of sorbent, the ratio of sample to solid support material, type of the elution solvent and the volume of the elution solvent were tested. Mean recoveries ranged from 93.16% to 102.73%, with relative standard deviations from 0.27% to 4.17%. With the extraction efficiency and time expenditure taken into account, MSPD extraction should be a comparatively good method.展开更多
[Objectives] The aim was to explore the best parameters for processing Aconiti Kusnezoffii Radix by bean curd. [Methods] Orthogonal test( L_(16)(4~3)) was designed to investigate the optimal soaking time,decocting tim...[Objectives] The aim was to explore the best parameters for processing Aconiti Kusnezoffii Radix by bean curd. [Methods] Orthogonal test( L_(16)(4~3)) was designed to investigate the optimal soaking time,decocting time and bean curd proportion for processing Aconiti Kusnezoffii Radix by bean curd. The contents of monoester alkaloids and diester-alkaloids were measured as the evaluation indexes. [Results]The contents of monoester alkaloids were 0. 11%,0. 07%,0. 062% and 0. 048% respectively under the four levels of soaking time,were0. 081%,0. 066%,0. 074% and 0. 067% respectively under the four levels of decocting time,and were 0. 070%,0. 072%,0. 080% and0. 073% respectively under the four levels of bean curd proportion. The content of diester-alkaloids was all below 0. 034%. The influence intensity of the three factors on the content of monoester alkaloids ranked as soaking time > decocting time > bean curd proportion. Under any of the above conditions,the content of diester-alkaloids was below the limit of Chinese Pharmacopoeia. The content of diester-alkaloids was reduced obviously with the increased use of bean curd. [Conclusions] The optimum processing conditions for Aconiti Kusnezoffii Radix were A_3B_3C_2,i. e.,soaking time of 6 d,decocting time of 5 h and bean curd proportion of 25%.展开更多
目的:本研究利用药效团、分子对接及实时反转录PCR(RT-PCR)方法探究诃子制草乌通过瞬时受体电位香草酸1(TRPV1)介导的减毒机制。方法:采用Discovery Studio 4.0软件构建基于TRPV1激动剂分子共同特征的TRPV1激活药效团,虚拟筛选出草乌中...目的:本研究利用药效团、分子对接及实时反转录PCR(RT-PCR)方法探究诃子制草乌通过瞬时受体电位香草酸1(TRPV1)介导的减毒机制。方法:采用Discovery Studio 4.0软件构建基于TRPV1激动剂分子共同特征的TRPV1激活药效团,虚拟筛选出草乌中的潜在活性成分;对草乌成分及诃子制草乌中引入的诃子成分进行Autodock vina分子对接研究;根据结果选出代表性成分,采用实时反转录PCR验证是否可促进心肌细胞中TRPV1 mRNA表达。结果:药效团共筛选出草乌中包括毒性较大的双酯型生物碱乌头碱、新乌头碱及次乌头碱在内的13个成分,分子对接结果表明这13个成分及诃子制草乌引入的诃子成分均有潜力与TRPV1结合。RT-PCR实验中没食子酸和新乌头碱在浓度≥25μmol/L时,均可明显促进大鼠H9c2心肌细胞中TRPV1 mRNA表达的增加,随着给药浓度的增大表达量增加,新乌头碱促进TRPV1 mRNA表达的作用更强。药效团、分子对接结果表明诃子和草乌中均含有多种具备TRPV1激活潜力的成分。结论:实验证明新乌头碱、没食子酸均可在一定程度上激活TRPV1通道,可作为TRPV1的激动剂。根据结果推测,诃子可能会通过拮抗草乌中的活性成分与TRPV1的结合,从而降低草乌通过TRPV1介导的毒性;也可能是诃子制草乌在引入没食子酸等诃子成分后,可在安全剂量范围内使TRPV1通道快速脱敏从而实现减毒。展开更多
AIM: To look for new principles of high activity and low toxicity from the leaves of Aconitum kusnezoffii Reichb. METHODS: The constituents were separated by using various column chromatography and their sturctures we...AIM: To look for new principles of high activity and low toxicity from the leaves of Aconitum kusnezoffii Reichb. METHODS: The constituents were separated by using various column chromatography and their sturctures were identified on the basis of spectral analysis. RESULTS: Three compounds were isolated from the leaves of Aconitum kusnezoffii . Their structures were elucidated as beiwutine (I). 8 OEt 14 benzoylmesaconine (II) and beiwucine (III). CONCLUSION: Compound III was shown to be a new diterpenoid alkaloid.展开更多
基金Supported by the Projects in the National Science & Technology Pillar Program During the Eleventh Five-Year Plan Period of China(No 2006BAI14B01)
文摘Matrix solid-phase dispersion（MSPD） was developed for the extraction of four alkaloids, including aconitine, mesaconitine, hypaconitine and deoxyaconitine, from the roots ofAconitum kusnezoffii Reichb. The determination of the analyte was carried out by high performance liquid chromatography with UV detection. The alkaline alumina was used as sorbent. The mixture of acetonitrile and water was used as elution solvent. Several extraction parameters, such as type of sorbent, the ratio of sample to solid support material, type of the elution solvent and the volume of the elution solvent were tested. Mean recoveries ranged from 93.16% to 102.73%, with relative standard deviations from 0.27% to 4.17%. With the extraction efficiency and time expenditure taken into account, MSPD extraction should be a comparatively good method.
文摘[Objectives] The aim was to explore the best parameters for processing Aconiti Kusnezoffii Radix by bean curd. [Methods] Orthogonal test( L_(16)(4~3)) was designed to investigate the optimal soaking time,decocting time and bean curd proportion for processing Aconiti Kusnezoffii Radix by bean curd. The contents of monoester alkaloids and diester-alkaloids were measured as the evaluation indexes. [Results]The contents of monoester alkaloids were 0. 11%,0. 07%,0. 062% and 0. 048% respectively under the four levels of soaking time,were0. 081%,0. 066%,0. 074% and 0. 067% respectively under the four levels of decocting time,and were 0. 070%,0. 072%,0. 080% and0. 073% respectively under the four levels of bean curd proportion. The content of diester-alkaloids was all below 0. 034%. The influence intensity of the three factors on the content of monoester alkaloids ranked as soaking time > decocting time > bean curd proportion. Under any of the above conditions,the content of diester-alkaloids was below the limit of Chinese Pharmacopoeia. The content of diester-alkaloids was reduced obviously with the increased use of bean curd. [Conclusions] The optimum processing conditions for Aconiti Kusnezoffii Radix were A_3B_3C_2,i. e.,soaking time of 6 d,decocting time of 5 h and bean curd proportion of 25%.
文摘AIM: To look for new principles of high activity and low toxicity from the leaves of Aconitum kusnezoffii Reichb. METHODS: The constituents were separated by using various column chromatography and their sturctures were identified on the basis of spectral analysis. RESULTS: Three compounds were isolated from the leaves of Aconitum kusnezoffii . Their structures were elucidated as beiwutine (I). 8 OEt 14 benzoylmesaconine (II) and beiwucine (III). CONCLUSION: Compound III was shown to be a new diterpenoid alkaloid.
