高效液相色谱法分析湖北贝母花中生物碱成分

目的:研究湖北贝母花与鳞茎生物碱成分的区别。方法:根据本实验室建立的湖北贝母指纹图谱,采用高效液相色谱-蒸发光散射检测法,以Hypersil ODS(250mm×4.6mm,5μm)为色谱柱,流动相甲醇(含0.05%三乙胺)-水梯度洗脱,流速为1.0mL.min-1,记录时间60min;以蒸发光散射检测器(ELSD)检测,检测条件漂移管温度75℃,氮气流速1.9L.min-1。结果:湖北贝母花中的生物碱成分得到很好的分离。结论:与湖北贝母指纹图谱对比,并与薄层色谱对照,湖北贝母花与鳞茎部位生物碱成分大体一致,花中浙贝甲素含量较鳞茎高而湖贝甲素含量较鳞茎低,花中湖贝甲素苷的含量很低。     

毛苞瓜叶乌头生物碱成分的研究

目的 研究毛苞瓜叶乌头根中的生物碱化学成分.方法 酸提碱沉提取总碱,硅胶层析法分离,波谱法鉴定结构.结果 分离到6个已知的去用二萜生物碱,分别为滇乌碱(yunaconitine)、塔拉萨敏(talasamine)、瓜乌定(hemsleyadine)、拳乌宁乙(circinanine B)、黄草乌碱丁(schaconitine)和senbusine A.结论 应用光谱法和与已知物TLC对照的方法鉴定了所有化合物的结构.     

不同骨架型乌头总生物碱贴片的经皮渗透性比较研究

目的:对比研究4种不同骨架型乌头总碱贴片的透皮吸收行为,筛选最佳贴片并对其进行体外释放度实验。方法:采用改良的Franz扩散池,以生理氯化钠溶液为接收介质,以大鼠离体背部皮肤为透皮屏障,计算4种骨架型贴片中乌头总碱及新乌头碱的稳态流量及滞后时间。结果:4种经皮给药制剂(TDS)中,黏胶剂骨架型贴片(P-3)稳态流量最高,其中乌头总碱的稳态流量9.2μg.cm-2.h-1,滞后时间1.413 h;新乌头碱的稳态流量0.243 6μg.cm-2.h-1,滞后时间1.172 h。该贴片体外释放符合回归方程,Higuchi方程为S(t)=13.32t1/2 18.428,r=0.980 1,体外释药机制为药物扩散和骨架溶蚀的综合效应。结论:黏胶剂骨架型是乌头总碱经皮给药制剂的理想设计模型。     

HPLC法测定苦参总碱中苦参碱与氧化苦参碱的含量

目的:采用高效液相色谱法测定苦参总碱中苦参碱和氧化苦参碱的含量。方法:采用 Elite Hypersil NH_2柱(5μm,250mm×4.6 mm),乙腈-无水乙醇-3%磷酸溶液(81:10:9)为流动相,流速:1.0 mL·min~(-1),检测波长220 nm,柱温:25℃,进样量:10 μL。结果:苦参碱、氧化苦参碱的线性范围分别为5.32～53.2μg·mL~(-1)(r=0.9997),65.7～525.6μg·mL~(-1)(r=0.9995)。苦参碱平均加样回收率为99.5%,RSD=1.0%(n=6);氧化苦参碱的平均加样回收率为99.7%,RSD=0.6%(n=6)。结论:本方法操作简便、快速、可靠,可用于控制苦参总碱质量。     

Study on inhibitory effect by total alkaloids in Capparis spinosa on SGC-7901 in vitro

Objective To investigate the apoptosis effect of Total alkaloids on human gastric cancer cells SGC-7901 from Capparis spinosa(C.S)and possible mechanism of it.Methods SGC-7901 cells were treated with different concentrations of the Total alkaloids in CS.MTT assay and SRB assay were used to observe the inhibitory rate of the Total alkaloids,and fluorescence microscope,flow cytometry and used to observe the influence of the Total alkaloids on cell apoptosis and cell cycle changes of SGC-7901.Results The results showed total alkaloids can inhibit the growth of human gastric adenoma cells SGC-7901.Measurements using mononuclear cell direct cytotoxicity assay(the MTT method)shows that its cytotoxic effect on SGC-7901 is strong,with IC50 being 142.895 μg·mL-1,respectively.Results from SRB assay show that the anticancer effect of Total alkaloids is cytostatic at low concentration,with LC50 for this cells being 41.271 μg·mL-1,respectively,but it becomes mainly cytotoxic at high concentration,with GI50 for SGC-7901 being 244·932 μg·mL-1,respectively.Total alkaloids can induce apoptosis in tumor cells.Forty-eight hours after they are treated with total alkaloids of different concentrations,SGC-7901 cells are stained with Hoechst33258 fluorochromes.Observation using a fluorescence microscope reveals that total alkaloids can cause the chromatin in tumor cell nuclei to condense and fragment.The nuclei condense into a uniform,dense mass and then break up.Sprouts keep on forming on the cell membrane and then dropping off,so that the cell breaks up into several apoptotic bodies of different sizes.As total alkaloids concentration is increased,these morphological changes under the microscope become more and more clear,indicating that the proportion of cells undergoing apoptosis is gradually increasing.After treating with 75,150 and 300 μg·mL-1 of the total alkaloids in C.S for 72 h,the apoptotic rates of SGC-7901 cells were 8.7%,14.309%,0.819%.Conclusions Inducing apoptosis is one of the anti-cancer mechanism of total alkaloids of C.S.     

感冒一小时胶囊中总香豆素、总黄酮、总生物碱三类成分的指纹图谱研究

目的:建立感冒一小时胶囊(羌活、独活、粉葛、黄芩、黄连等)中总香豆素、总黄酮和总生物碱的特征指纹图谱。方法:运用HPLC-DAD方法,色谱柱为Hypersil C18(4.6 mm×150 mm,5μm),流动相A为乙腈,分离香豆素类成分时流动相B为水,分离黄酮类成分时流动相B为0.1%磷酸水溶液,分离生物碱类成分时流动相B为0.05 mol/L磷酸二氢钾缓冲液(含0.3%三乙胺,磷酸调pH 3.0),梯度洗脱;检测波长分别为318 nm、277 nm和347 nm。结果:香豆素类成分特征指纹图谱中含有38个共有峰,主要成分为蛇床子素和异欧前胡素,约占总峰面积的30%,其中蛇床子素为18%,异欧前胡素为12%;黄酮类成分特征指纹图谱中含有17个共有峰,主要成分为黄芩苷,约占总峰面积的37%;生物碱类成分特征指纹图谱中含有26个共有峰,主要成分为盐酸小檗碱,约占总峰面积的46%。结论:建立的三类成分色谱指纹图谱特征性和专属性较强,可用于感冒一小时胶囊的质量控制。     

黄连总生物碱对实验性糖尿病肾病大鼠肾功能保护作用的研究

目的 观察黄连总生物碱对实验性糖尿病肾病大鼠肾功能的保护作用.方法 雄性SD大鼠30只,随机分为5组,每组6只.一组作为正常对照组,其余4组分别以高糖高脂饮食加单肾切除、腹腔内注射链脲佐菌素建立糖尿病肾病模型.造模后其中3组分别给予高中低剂量黄连总生物碱,另一组为模型对照组.各模型组及对照组每4周,测1次血糖及尿微量白蛋白.造模后12周,心脏取血,测肌酐、尿素、糖化血红蛋白等.结果 模型组血糖、血尿素氮、血肌酐均显著高于正常对照组,P＜0.05,尿肌酐、肾小球滤过率均低于正常对照组,P＜0.05.尿微量白蛋白值升高.黄连总生物碱干预组大鼠血糖显著降低,肾功能显著改善,其中中剂量组降糖及肾功能改善效果最为显著.结论 黄连总生物碱对糖尿病肾病大鼠有保护其肾功能,并延缓肾功衰竭过程的作用.     

闽产代代果中化学成分的分离分析

采用薄层色谱法对闽产代代果中主要化学成分进行初步的分离、分析、鉴定,结果:代代果中生物碱类成分以正丁醇-冰醋酸-水(4∶1∶5上层)为展开剂,黄酮类以A醋酸乙酯-甲醇-水(100∶17∶13)和B二甲苯-醋酸乙酯-甲酸-水(20∶10∶1∶1)为展开剂,挥发油类以石油醚-醋酸乙酯(10∶1)为展开剂,各类主要化学成分均获得良好的分离,说明薄层色谱鉴别方法可作为闽产代代的质量控制方法之一.     

氮、磷、钾对益母草生长及水苏碱和总生物碱影响的研究

目的研究氮、磷、钾肥对益母草生长发育及次生代谢物的影响。方法采用大田试验与室内分析相结合的方法。结果益母草各项生长、产量及水苏碱和总生物碱的量基本均为复肥型高于单肥型，复肥型中又以营养平衡型大于营养失调型，但单施氮肥对以上各项指标均有很大促进作用。在复肥型中，足量磷元素与氮元素的合理配施可以提高氮的肥效。结论以益母草株高、叶片数、分蘖数、产量及水苏碱和总生物碱的量为评价标准，根据氮、磷、钾二次肥料数学模型的计算结果，确定最佳施肥量为：N：37．5～44．0g／m^2，P：37．4～54．3g／m^2，K：31．6～34．4g／m^2，氮、磷、钾的最佳配比为4：4．5：3．3。     

In vitro antimalarial activity,chloroquine potentiating effect and cytotoxicity of alkaloids of Hernandia voyronii Jum. (Hernandiaceae)

Hernandia voyronii is traditionally used as adjuvant to chloroquine in Madagascar. Neutral and basic alkaloidal extracts of this plant were evaluated for their intrinsic in vitro antimalarial activity, cytotoxicity and chloroquine potentiating action against the chloroquine resistant Plasmodium falciparum strain FCM29. Bioassay directed fractionation clearly demonstrated that both the intrinsic antimalarial activity and the chloroquine potentiating action was localized in the polar alkaloidal extract. Moreover, this extract had low cytotoxicity to HeLa cells and L929 fibroblasts. These results support the traditional use of H. voyronii as an antimalarial and adjuvant to chloroquine.