云南含克班宁的千金藤属植物资源调查研究

目的 :了解含克班宁 (Crebanine,Cre)的千金藤属植物 (山乌龟 )在云南的资源状况 ;筛选克班宁含量高的品种。方法 :对云南省的部分县、市进行实地调查与采集样品 ,采用形态性状鉴别、薄层色谱鉴别以及提取分离等法比较克班宁含量与提取率。结果 :克班宁含量高的品种集中分布于临沧及其周边地区 ,且枝叶多有红色汁液。结论 :含克班宁的千金藤属植物资源在云南中、南部较丰富 ,可合理开发利用。     

雷公藤、防己醇提物对淋巴细胞和环氧化酶的影响

目的:探讨雷公藤、防己醇提取物对淋巴细胞和环氧化酶的影响.方法:测定两种药物的醇提物引起小鼠胸腺淋巴细胞和脾脏淋巴细胞增殖的变化,新生小公牛颈动脉内皮细胞的6-keto-PGF1α和小鼠腹腔巨噬细胞的PGE2含量.结果:雷公藤和防己醇提物对小鼠胸腺淋巴细胞和脾脏淋巴细胞的增殖有抑制作用.雷公藤醇提物对环氧化酶-1(COX-1)和环氧化酶-2(COX-2)有不同程度的抑制作用.防己醇提物对COX-1有抑制作用,而对COX-2无抑制作用.结论:两种药物的祛风湿的部分机理可能是由于抑制淋巴细胞增殖和环氧化酶而介导的.     

正交试验优选防己中粉防己碱和防己诺林碱的提取工艺

目的优选防己中粉防己碱和防己诺林碱的最佳提取工艺。方法以总生物碱的含量和浸膏的率为考察指标,采用正交试验,考察提取溶媒的浓度、提取时间、提取次数和提取溶媒的用量对提取的影响,确定了防己中粉防己碱和防己诺林碱的最佳提取工艺。结果最佳提取工艺条件是：以6倍量60%乙醇提取3次,每次1小时。结论优选得到的提取工艺得率高,操作简便易行。     

海南地不容生物碱抑制肿瘤细胞增殖及构效关系解析

目的研究海南地不容(Stephania hainanensis H.S.Lo et Y.Tsoong)生物碱对人肝癌细胞Hep G-2、乳腺癌细胞MCF-7、胃癌细胞SGC-7901增殖的影响,筛选出有效的抗肿瘤化合物以及其敏感细胞株;分析其生物碱的构效关系。方法采用MTT法检测不同浓度的海南地不容生物碱对人肝癌细胞Hep G-2、乳腺癌细胞MCF-7、胃癌细胞SGC-7901增殖的抑制率;通过查阅国内外相关文献,分析海南地不容生物碱抗肿瘤活性的基本构效关系。结果MTT结果显示荷包牡丹碱、氧化克班宁、去甲荷包牡丹碱和克班宁对人肝癌Hep G-2、乳腺癌MCF-7和胃癌SGC-7901细胞的增值分别具有不同程度的剂量依赖性的抑制作用,各给药组分吸光度值与空白对照组比具有显著性差异(P<0.01),与阳性对照比较无明显统计学差异(P>0.05);海南地不容生物碱结构中的1,2-亚甲二氧基、N-亚甲基等取代基以及其化学结构的平面性对其抗肿瘤活性有重要影响。结论海南地不容中具有明显抗肿瘤作用的生物碱为荷包牡丹碱、氧化克班宁、去甲荷包牡丹碱和克班宁,其敏感细胞株均为乳腺癌细胞MCF-7;通过分析海南地不容生物碱的结构和抗肿瘤活性的关系,初步明确了其抗肿瘤活性可能与其结构易于抑制DNA拓扑异构酶和诱导细胞凋亡有关。     

Effects of oral administration of Stephania tetrandra S. Moore on neovascularization of retinal and choroidal capillaries of diabetes in rats

In rats, an injection of streptozotocin (STZ) elevated blood levels of glucose 4 weeks later (STZ-induced diabetes) and an over-production of microvessels of retinal and choroidal capillaries of eyes developed. A previous study has shown that administration of Stephania tetrandra S. Moore (STSM) in culture prevented the over-production of microvessels of those capillaries of STZ-induced diabetes in vitro. Therefore, the study investigated whether or not orally administered STSM could inhibit over-production of microvessels of those capillaries of STZ injected rats in vivo. When STSM was given at the same time as the STZ injection and continued daily for 7 weeks, STSM prevented the elevation of blood glucose level and over-production of microvessels of those capillaries. When STSM was given after elevation of blood glucose level of glucose (4 weeks after STZ injection) and continued daily for 4 weeks, STSM lowered the elevated blood glucose level but had no effect on the over-production of microvessels of those capillaries. It was inferred that deposition of N(epsilon)(carboxymethyl) lysine in retinal and choroidal tissues, which is induced by STZ-induced diabetes may deteriorate the blood-retinal barrier and the blood-choroidal barrier. One might, therefore, speculate that advanced STZ-induced diabetes may deteriorate the blood-retinal barrier and blood-choroidal barrier. Therefore, STSM may not reach the retinal and choroidal tissues in the posterior ocular region in vivo.     

海南地不容总碱的镇痛抗炎作用及毒性观察

目的研究海南地不容总生物碱的镇痛抗炎作用及急性毒性。方法采用小鼠热板法、扭体法及甲醛测痛试验观察镇痛作用;采用二甲苯致小鼠耳肿胀、醋酸致小鼠腹腔毛细血管通透性、棉球诱导小鼠肉芽组织增生试验模型观察抗炎作用,通过胸腔白细胞游走试验研究其对炎症渗出液中白细胞数量的影响,应用交叉菜胶致足肿胀试验测定炎性组织中前列腺素E2（PGE2）含量并初步探讨其抗炎机理,急性毒性试验采用改良寇氏法测定LD50。结果海南地不容总碱能明显延长小鼠舔后足时间,减少扭体次数,降低甲醛测痛试验第一、二时相的疼痛强度;减轻小鼠耳肿胀,抑制毛细血管通透性增高及肉芽组织增生,有效抑制白细胞游走,并能明显减少大鼠炎症组织中PC-E2含量。其LD50为0．569g·kg-1,95％可信限为0．519～0．623g·kg-1。结论海南地不容总碱镇痛、抗炎作用显著,其机理可能与抑制PGE2的产生与释放有关。     

Stephania tetrandra prevents and regresses liver fibrosis induced by carbon tetrachloride in rats

Background and Aim:  There is currently no safe and effective treatment for liver fibrosis. We have previously shown that Stephania tetrandra ( ST ) and Salvia miltiorrhiza ( SM ) suppress cell proliferation and enhance apoptosis of hepatic stellate cell (HSC) in vitro . In this study, we aimed to investigate the anti-fibrotic effect of these two herbs in vivo .
Methods:  Liver fibrosis was induced by carbon tetrachloride (CCl₄) injection in rats for 5 weeks. SM , ST or SM  +  ST was gavaged on day 1 of CCl₄ administration to study the preventive effects of herbs on hepatic fibrosis. In a separate study designed to assess possible fibrosis regression, rats were randomly allocated to be treated with SM, ST or SM  +  ST when fibrosis was established. Liver injury and collagen content were assessed. HSC activation and apoptosis were determined.
Results:  As compared with the CCL₄-only rats, serum ALT was significantly lower in CCl₄-treated rats that received either SM ( P  < 0.01) or ST ( P  < 0.01). Administration of ST significantly prevented ( P  < 0.01) or reversed the hepatic fibrosis ( P  < 0.01) induced by CCL₄. Moreover, rats treated with ST had reduced protein expression of α-SMA both in prevention ( P  < 0.05) and in regression ( P  < 0.01) experiments. The double-color staining of α-SMA and TUNEL showed that ST increased HSC apoptosis. However, co-treatment of SM  +  ST did not increase the antifibrotic effect of ST .
Conclusions:  Stephania tetrandra safely and effectively prevents and reverses hepatic fibrosis through activating HSC apoptosis in rats.     

非水毛细管电泳法测定防己及其制剂中防己诺林碱和防己碱的含量

目的：建立简单、快速、灵敏的能同时分离测定防己及其制剂中防己诺林碱和防己碱的非水毛细管电泳方法。方法：采用非水毛细管电泳法,缓冲体系50 mmol·L^-1醋酸铵-1.0%醋酸-20%乙腈的甲醇溶液,熔融石英毛细管(75 μm×50.0 cm),分离电压20 kV,检测波长214 nm,阳极进样。结果：防己诺林碱和防己碱在1.00～500 mg·L^-1与峰面积线性关系良好。迁移时间的日内相对标准偏差分别为0.09%和0.59%,日间相对标准偏差分别为0.63%和1.9%；峰面积的日内相对标准偏差分别为0.45%和4.9%,日间相对标准偏差分别为2.3%和5.6%。防己中防己诺林碱和防己碱平均回收率分别为102%和105%,风痛安胶囊中防己诺林碱和防己碱平均回收率分别为94.6%和98.7%。结论：该方法简单、快速、准确、重复性好,可用于防己及其制剂的质量控制。     

广西地不容组培快繁研究

目的研究广西地不容的组培快繁技术,为大量生产种苗提供方法和技术。方法以嫩茎节段为外植体,以MS为基本培养基,通过不同的激素种类和浓度配比,选择出最佳的诱导、继代增殖和生根培养基配方。结果MS NAA0.1mg/L BA1.0mg/L利于诱导出芽,可用于初代培养。继代增殖则以MS IBA0.4mg/L NAA0.2mg/L GA0.5~1.0mg/L、MS NAA0.1mg/L GA1.0mg/L和MS IBA0.2mg/L BA0.4~0.8mg/L GA0.5~1.0mg/L3种培养基交替培养,繁殖系数6.0倍/50d。1/2MS IBA0.8mg/L适宜诱导生根获得再生植株,生根率75%。生根苗春夏之交移栽最好,成活率90%。结论本研究得出的方法可用于工厂化生产广西地不容种苗。     

地不容块茎中的生物碱

目的:研究地不容Stephania epigaea Lo中具有细胞毒活性的化学成分。方法:利用反复硅胶色谱柱进行分离纯化,通过理化性质和光谱数据分析鉴定化合物结构。结果:分离得到6个生物碱,分别鉴定为千金藤素( )-cepharan-thine(1),轮环藤宁cycleanine(2),(-)-norcycleanine(3),isochondodendrine(4),delavaine(5)和runanine(6)。结论:生物碱3～6为首次从该植物中分得,1～4体外有肿瘤细胞毒活性。