优良资源植物——三颗针的质量考查研究之二

对四种同季不同产地采集的“三颗针”不同部位的四种生物碱进行了含量测定和分析,为该类药材的质量研究、生药采收、药厂选投料及开发应用等提供了科学依据。同时对该类资源的可持续利用也具有积极意义。     

珠芽紫堇化学成分研究

从珠芽紫堇块茎中分得３个生物碱Ⅰ、Ⅱ、Ⅲ，经光谱解析确定了化合物Ⅱ的结构为（＋）－异紫堇灵，系首次从该植物中分得。     

白屈菜总生物碱止咳平喘作用实验研究

目的：观察白屈菜总生物碱的止咳平喘作用。方法：昆明种小鼠和豚鼠,均ig给予白屈菜总生物碱5,10,20mg.kg^-1,经小鼠氨水引咳实验,豚鼠枸橼酸引咳实验,豚鼠组织胺引喘实验,观察用药前后引咳潜伏期,3min内的咳嗽次数和豚鼠的引喘潜伏期及发生抽搐跌倒的动物数。结果：白屈菜总生物碱可明显地延长小鼠引咳潜伏期,减少咳嗽次数,延长豚鼠的引喘潜伏期,减少抽搐跌倒的动物数,与对照组比较差异显著（P＜0．01）,结论：白屈菜总生物碱有明显的止咳平喘作用。     

阔叶十大功劳根中生物碱组分体外抗流感病毒试验研究

利用鸡胚试验技术研究了阔叶十大功劳根中生物碱成分在体外对流感病毒的抑制作用。试验结果表明，阔叶十大功劳根中生物碱成分在20mg／ml时对鸡胚无毒性，0．25mg／ml时仍显示出对甲1型流感病毒较强的抑制作用。     

关白附的HPLC指纹图谱

目的：对东北产10个批号的关白附药材指纹图谱进行了比较.方法：应用RP-HPLC法,Diamonsil C18色谱柱,流动相为2 mg/mL浓度的庚烷磺酸钠水溶液（含0.2%三乙胺并以H3PO4调pH至3.0）-乙腈二元梯度洗脱,流速为1.0 mL/min,检测波长205 nm.结果：不同批号的关白附药材所含生物碱成分均得到很好的分离,确定了指纹图谱中10个共有峰,共有峰峰面积之和均大于各总峰面积的90%.结论：该方法可用于关白附的真伪鉴别和质量评价.     

血水草杀螺成分-血水草生物碱(ECA)的提取

目的 从血水草中提取杀螺有效成分—血水草生物碱(ECA)。方法 采用70％乙醇渗漉提取，用减压浓缩、酸解、盐析等方法纯化，提取ECA原粉。结果 ECA原粉的提取率为1.009％．结论 本提取方法可靠，设备及工艺流程简单，提取条件易控制，且成本低，便于开发应用。     

Factors Affecting the Stimulating Capacity of Mitogen-Transformed,Glutaraldehyde-Treated Mouse Spleen Cells in the Mixed Lymphocyte Reaction

Mouse spleen cells transformed by certain mitogens and subsequently fixed with glutaraldehyde can be utilized as stimulators in the mixed lymphocyte reaction. In addition to bacterial lipopolysaccharide which has been shown previously to be effective, we have found the other B cell mitogens, dextran sulfate and Concanavalin A-Sepharose, to be functional. The ability of the treated cells to activate allogeneic cells in MLR depends upon the concentration of glutaraldehyde and the type of tissue culture medium utilized.     

国内生物碱类中草药抗心律失常的临床应用与基础研究

阐述了国内２０种生物碱类中草药抗心律失常的临床应用与基础研究近况，为进一步研究及开发应用这些药物，发展新一类天然植物来源的生物碱类抗心律失常药物提供了理论依据。     

Palmatine activates AhR and upregulates CYP1A activity in HepG2 cells but not in human hepatocytes

The protoberberine alkaloid palmatine is present in preparations from medicinal plants such as Coptis chinensis and Corydalis yanhusuo. This study examined whether palmatine affects the expression of cytochromes P450 (CYPs) 1A1 and 1A2 in primary cultures of human hepatocytes and human hepatoma HepG2 cells grown as monolayer or spheroids. Gene reporter assays showed that palmatine significantly activated the aryl hydrocarbon receptor (AhR) and increased the activity of CYP1A1 gene promoter in transiently transfected HepG2 cells. In HepG2 monolayer culture, palmatine also significantly increased mRNA and activity levels of CYP1A1, albeit with considerably less potency than 2,3,7,8-tetrachlorodibenzo-p-dioxin, a prototypical CYP1A inducer. On the other hand, CYP1A activity was not significantly elevated by palmatine in HepG2 spheroids. Moreover, palmatine induced mild or negligible changes in CYP1A1 and CYP1A2 mRNA expression without affecting CYP1A activity levels in primary human hepatocytes. It is concluded that palmatine activates the AhR-CYP1A pathway in HepG2 monolayer, while the potential for CYP1A induction is irrelevant in cell systems which are closer to the in vivo situation, i.e. in HepG2 spheroids and primary cultures of human hepatocytes. Possible induction of CYP1A enzymes by palmatine in vivo remains to be investigated.     

荷叶生物碱部位大鼠血中移行成分的初步研究

目的:初步研究荷叶生物碱部位大鼠给药后血中的移行成分。方法:建立荷叶生物碱部位大鼠给药后血中移行成分HPLC分析方法;比较荷叶生物碱部位,给药后所得血浆样品及空白血浆样品色谱图,初步指认出荷叶生物碱部位大鼠血浆中的移行成分。结果:在实验条件下,检测到16个血中移行成分,其中3个为原型成分直接入血,13个为代谢产物。紫外图谱显示的各峰最大吸收波长与原型物质最大吸收波长比较结果提示,7个代谢产物最大吸收波长与原型相同,表明其基本骨架未发生变化,6个代谢产物最大吸收波长变化较大,表明结构变化较明显。结论:通过对荷叶生物碱部位血中移行成分进行分析,可初步推测其代谢产物的结构,并将有助于对其体内吸收、分布、代谢、排谢及作用机制的研究。