白花丹醌的研究进展

近年来天然药物及其提取物在预防和治疗方面的作用引起了医学界研究者的广泛关注,白花丹的提取物——白花丹醌在治疗肝纤维化方面及其他领域成为研究者的首选之一。最近的研究表明白花丹醌在癌症治疗方面是理想的重药,鉴于其用途极大,为了进一步临床前制剂开发研究,就白花丹醌的提取、药理作用以及综合利用作如下述说。     

瑶药白花丹炮制前后白花丹醌含量测定及小鼠急性毒性试验

目的:比较白花丹生品及炮制品的白花丹醌含量及急性毒性大小,为探讨白花丹炮制机理提供依据。方法:采用测定半数致死量的方法对白花丹生品及炮制品的急性毒性进行研究;采用高效液相色谱法测定白花丹生品及炮制品中的白花丹醌的含量。结果:白花丹生品及炮制品的LD50分别为88.7 g/kg、99.5 g/kg,其白花丹醌的质量分数分别为0.0136%、0.0041%。结论:白花丹炮制后急性毒性显著降低,表明用炮制能减少白花丹醌的含量,降低白花丹的毒性。     

HPLC测定不同采收途径及不同部位白花丹中白花丹醌的含量

目的:分析不同采收途径及不同部位的白花丹中白花丹醌含量,寻找富集白花丹醌的药用部位和白花丹的最佳采收途径。方法:采用HPLC法测定不同采收途径白花丹和不同部位中白花丹醌的含量:色谱柱为Hypersil ODS(25cm×4.6mm,25μm),流动相为甲醇-水(65∶35),流速为1.0mL/min,检测波长为213nm,柱温30℃。结果:白花丹醌在0.01μg～0.32μg含量范围呈线性关系,Y=18211600X+10434.57758,r=0.99946,RSD=1.28%(n=6);新鲜的白花丹根部、茎部及叶中白花丹醌的含量分别为0.026%、0.006%和0.014%;干燥的白花丹根部、茎部及叶中白花丹醌的含量分别为0.324%、0.082%和0.174%;枯萎的白花丹茎部、叶及穗中白花丹醌的含量分别为0.002%、0.001%和0.003%。结论:干燥组白花丹中白花丹醌含量高于新鲜组和枯萎组,白花丹根部的白花丹醌含量最高,其次是穗,叶、茎。本法简便、准确,灵敏度高,重复性好,可用于控制白花丹药材的质量。     

白花丹醌对肝癌细胞HepG2增殖及血管内皮生长因子表达的影响

目的研究白花丹醌对人肝癌细胞HepG2的增殖、克隆形成及血管内皮生长因子(VEGF)表达的影响。方法 MTT法检测白花丹醌对人肝癌细胞HepG2的增殖抑制率;平板克隆形成实验检测白花丹醌对HepG2细胞克隆形成率的影响;RT-PCR及免疫荧光细胞化学检测白花丹酯对HepG2细胞VEGFmRNA和蛋白表达的影响。结果 MTT法结果显示白花丹醌对人肝癌细胞HepG2的增殖有抑制作用,且随着药物浓度增加(2、8、32、128μmol/L)和作用时间(24、48、72h)延长,其抑制作用逐渐增强,与细胞对照组相比有显著差异(P0.05);平板克隆形成实验显示白花丹醌对HepG2细胞克隆形成有显著抑制作用(P0.05);RT-PCR及免疫荧光细胞化学均显示随白花丹醌药物浓度增高,HepG2细胞VEGFmRNA及蛋白表达水平下调。结论白花丹醌对人肝癌细胞HepG2的增殖、克隆形成及VEGF表达均有显著抑制作用,其可能成为一种新的抗肿瘤药物。     

不同栽培条件下白花丹根、茎、叶中白花丹醌的含量测定

 目的 对家种不同栽培条件下白花丹药材根、茎、叶中的白花丹醌进行含量测定,为建立白花丹野生变家种的栽培技术规范提供实验数据。方法 采用高效液相色谱法测定家种药材根、茎、叶中白花丹醌的含量。结果 在熟土和黏土中生长的药材中白花丹醌的含量高于沙土、生土;施加K肥和N肥的药材中白花丹醌的含量高于施加P肥的药材,在全光照条件下生长的药材白花丹醌含量最高;不同繁殖方式中,根、茎和叶中白花丹醌的含量变化不大。结论 课题组前期研究成果表明,白花丹醌为白花丹药材抗癌和抗炎等生物活性的主要有效成分,因此,从白花丹醌含量的角度考虑,白花丹药材的最佳栽培条件为：土壤为黏土,采用扦插苗,生长过程中施加一定的N肥和K肥,光照条件为全光照,在此条件下可获得优质高产的白花丹药材。     

维药白花丹的质量标准

目的改进维药白花丹药材的质量标准。方法采用性状鉴别、显微鉴别及TLC法对维药白花丹药材进行定性鉴别;采用HPLC法测定白花丹中白花丹醌的量。结果建立的性状鉴别、显微鉴别及薄层色谱图清晰;水分低于9.0%;总灰分不超过9.0%;醇溶性浸出物在10.0%以上;白花丹醌在0.028 6⁰.457 6μg范围内呈良好的线性关系,加样回收率为100.37%,RSD为1.15%,12批白花丹药材中白花丹醌的量为0.007 1%0.457 6μg范围内呈良好的线性关系,加样回收率为100.37%,RSD为1.15%,12批白花丹药材中白花丹醌的量为0.007 1%⁰.052 2%。结论建立白花丹药材质量标准研究方法可行,重复性好,能有效控制该药材质量。     

白花丹的化学成分研究

目的 研究白花丹的化学成分.方法 利用硅胶柱层析分离纯化白花丹乙醇提取物,并通过理化性质和TLC,UV,IR,1HNMR,MS等分析鉴定化合物结构.结果 分离得到3个化合物,分别鉴定为白花丹醌(Ⅰ)、β-谷甾醇(Ⅱ)、香草酸(Ⅲ).结论 为建立白花丹药材的品质评价、临床用药安全和新药开发提供了实验数据.     

白花丹醌大鼠在体胃肠吸收动力学初步研究

目的考察民族药白花丹的主要有效成分白花丹醌大鼠原位胃肠吸收动力学特征。方法采用大鼠原位灌注模型,以高效液相色谱法测定肠灌注液中白花丹醌含量的变化,紫外分光光度法测定酚红的浓度。结果白花丹醌在十二指肠、回肠、空肠、结肠的吸收率分别为41.37%,49.86%,44.37%和41.36%,最佳吸收部位为回肠段。不同质量浓度的肠灌注液(50,100,200 mg.L-1)在小肠的吸收速率常数为:0.688 8,0.662 0和0.530 8;白花丹醌胃吸收特点有待进一步考察。结论白花丹醌肠道吸收较好,最佳吸收部位为回肠。     

进口维药白花丹与国产白花丹的比较

目的 考察进口维药白花丹与国产白花丹的区别.方法 收集了10批进口维药白花丹和6批广西产白花丹,从药材的性状、显微鉴别、含量测定等方面进行了比较.结果 国产白花丹与进口维药中所用的白花丹为同一药材,国产白花丹药材中白花丹醌含量普遍高于进口白花丹.结论 为国产白花丹可作为维药白花丹的来源提供了一定的依据.     

白花丹醌的提取分离鉴定

目的对多民族药材白花丹(Phum bago zeylanicaL.)中的白花丹醌进行提取分离和鉴定。方法用硅胶柱层析分离;用TLC,IR,MS,NMR等技术鉴定结构。结果从白花丹中分离得到桔黄色针状结晶,根据理化性质、薄层色谱及光谱数据分析,鉴定为白花丹醌(P lumbagin)。结论为建立白花丹药材的质量控制方法打下了物质基础,对白花丹临床用药安全及进一步开发具有极其重要的意义。     

Further investigations into the bioactivity of root extract of Plumbago zeylanica

The metabolic effect of crude and ethanol extracts of the root of Plumbago zeylanica was investigated in rats. The treatment of rats with crude Plumbago zeylanica and its ethanol extract resulted in an increase in the activities of serum lactate dehydrogenase, acid phosphatase and liver alkaline phosphatase. The blood sugar concentrations increased significantly while liver acid phosphatase and total nucleic acids were drastically reduced. © 1997 John Wiley & Sons, Ltd.     

Antiviral activities of some Ethiopian medicinal plants used for the treatment of dermatological disorders

Acokanthera schimperi (Apocynaceae), Euclea schimperi (Ebenaceae), Inula confertiflora (Asteraceae), Melilotus elegans (Leguminosae), and Plumbago zeylanica (Plumbaginaceae), are some of the medicinal plants used in Ethiopia for treatment of various skin disorders. In this study, the antiviral activities of the 80% methanolic extracts of these plants have been examined against coxsackievirus B3 (CVB3), influenza A virus and herpes simplex virus type1 Kupka (HSV-1) using cytopathic effect (CPE) inhibitory assays in HeLa, MDCK, and GMK cells, respectively. In parallel, the cytotoxicity was quantified using a crystal violet uptake assay. The antiviral activity of the most active compound was confirmed with plaque reduction assays. The results revealed that the extracts of Acokanthera schimperi and Euclea schimperi showed antiviral activity against all three tested viruses albeit with unequal efficacy. Whereas the Acokanthera schimperi extract exhibited the strongest activity against CVB3, the extract of Euclea schimperi inhibited influenzavirus A replication most effectively. A weak anti-influenzavirus A activity was also exhibited by the other plant extracts tested. In addition, CVB3 was inhibited by the extracts of Plumbago zeylanica and HSV-1 by Inula confertiflora. Thus, the extracts of these plants, particularly those of Acokanthera schimperi, Euclea schimperi and Inula confertiflora which showed activity against CVB3 and HSV-1 support their traditional use in the treatment of skin diseases of viral origin.     

白花丹血清指纹图谱的初步研究

目的对民族药材白花丹进行血清指纹图谱的初步研究,为确定白花丹的药效成分奠定基础。方法建立白花丹醇提取物、口服白花丹后大鼠含药血清和空白血清的HPLC指纹图谱的分析方法,确定白花丹中的入血成分。结果在白花丹含药血清中发现了1个入血成分。结论1个入血成分可能成为白花丹的体内直接作用物质。     

In vitro screening of Indian medicinal plants for antiplasmodial activity

Plants traditionally used in India to treat fever or malaria were examined in vitro for antiplasmodial properties against Plasmodium falciparum. Of 80 analysed ethanol extracts, from 47 species, significant effects were found for 31 of the extracts. These represent 23 different species from 20 families. Of the active species 20 were tested against P. falciparum for the first time. The following five species seems to be of special interest for further antimalarial studies, Casearia elliptica, Holarrhena pubescens, Pongamia pinnata, Soymida febrifuga, and Plumbago zeylanica.     

Wound healing effects of Heliotropium indicum, Plumbago zeylanicum and Acalypha indica in rats.

The ethanolic extracts of Heliotropium indicum, Plumbago zeylanicum and Acalypha indica were evaluated for their wound healing activity in rats. Wound healing activity was studied using excision and incision wound models in rats following topical application. Animals were divided into four groups with six in each group. Ten percent w/v extract of each plant was prepared in saline for topical application. H. indicum possesses better wound healing activity than P. zeylanicum and A. indica. Tensile strength results indicate better activity of H. indicum on remodeling phase of wound healing.     

紫雪花水提液抗肿瘤的初步研究

目的观察紫雪花水提液对小鼠移殖性肿瘤S180的抑瘤作用,及其对免疫器官的影响。方法采用昆明种小鼠,随机分组进行实验,观察不同剂量紫雪花水提液(6.8,13.5,27 g/kg)3种剂量、紫雪花水提液与氟脲嘧啶(5-FU)合用以及单用氟脲嘧啶对小鼠移殖性肿瘤S180的抑瘤率的差别以及对胸腺、脾脏、肝脏的影响。结果紫雪花水提液3种剂量和紫雪花水提液与氟脲嘧啶合用及氟脲嘧啶单用对小鼠S180均有不同程度的抑制肿瘤生长的作用,抑瘤率分别为22.35%(P>0.05),40.01%(P<0.05),26.45%(P>0.05),50.5%(P<0.01),56%(P<0.01)。紫雪花水提液在发挥抑瘤作用的同时,可降低肝脏和脾脏的重量,但对胸腺有明显的保护作用。与5-Fu(0.025 g/kg)合用有抑瘤作用,并可明显的对抗5-Fu抑制胸腺的作用。结论3种剂量紫雪花水提液均有抑制小鼠移殖性肿瘤S180的生长作用。紫雪花水提液与5-Fu合用对小鼠移殖性肿瘤S180有抑瘤作用,同时,具有明显的对抗5-Fu抑制胸腺的作用。