尖瓣瑞香茎中双黄烷酮类成分研究

目的 研究尖瓣瑞香Daphne acutiloba茎中双黄烷酮类化学成分.方法 采用硅胶柱色谱与Sephadex LH-20凝胶柱色谱进行分离纯化,并运用波谱方法鉴定化合物的结构.结果 从尖瓣瑞香茎95％乙醇回流提取物醋酸乙酯萃取部位中分离得到14个双黄烷酮,分别鉴定为毛瑞香素A(1)、毛瑞香素C(2)、毛瑞香素C'(3)、毛瑞香素F(4)、毛瑞香素E(5)、荛花醇(6)、毛瑞香素K(7)、异狼毒素(8)、狼毒素(9)、毛瑞香素D1 (10)、毛瑞香素H(11)、3-甲氧基-毛瑞香素H(12)、毛瑞香素K ’(13)和毛瑞香素B (14).结论 除化合物14外,其他化合物均为首次从该植物中分离得到.     

芫花根的化学成分

目的:研究芫花Daphne genkwa根的化学成分,并筛选其生物活性。方法:采用硅胶柱色谱,凝胶柱色谱等手段,结合理化性质和波谱数据,对芫花根的乙酸乙酯萃取部分的化合物进行分离鉴定。结果:从芫花根中分离得到了16个化合物,分别鉴定为二氢瑞香素乙(dihydrodaphnodorin B,1),荛花醇A(wikstrol A,2),瑞香酚(stelleranol,3),毛瑞香素D2(daphnodorin D2,4),毛瑞香素D1(daphnodorin D1,5),毛瑞香素A(daphnodorin A,6),O-methyledgeworin(7),clemaphenol A(8),1β-hydroxy-10βH-guaia-4,11-dien-3-one(9),1αH,10αH,7αH-guaia-4,11-dien-3-one(10),1,5-diphenylpentan-1-hydroxy-3-one(11),oleodaphnone(12),S-(+)-1,5-diphenylpentan-3-hydroxy-1-one(13),8-hydroxypluviatolide(14),表木栓醇(epifriedelanol,15),5α-stigmast-9(11)-en-3β-ol(16)。生物活性筛选结果表明,化合物1,2,6对金黄色葡萄球菌有抑制作用。结论:化合物1~6,10,12,13首次从芫花中分离得到,化合物11,15首次从瑞香属中分离得到,化合物7~9,14,16首次从瑞香科中分离得到。     

丝毛瑞香化学成分研究

 目的研究丝毛瑞香的化学成分。方法利用反复硅胶柱色谱、凝胶柱色谱进行分离,通过波谱解析和理化性质进行化合物结构鉴定。结果分离得到10个苯丙素类化合物,分别鉴定为双白瑞香素(1),瑞香新素(2),5′-去甲氧基瑞香新素(3),(-)-双氢芝麻素(4),丁香树脂酚(5),芥子醛(6),edgeworin(7),edgeworthin(8),(-)-epinortrachelogenin(9)和落叶松脂醇(10)。结论化合物9为首次从瑞香科植物中分离所得,其余均为从该植物中首次分离得到。     

黄瑞香茎皮的化学成分研究

目的研究黄瑞香Daphne giraldii茎皮的化学成分。方法利用反复硅胶、Sephadex LH-20、ODS以及MCI柱色谱等手段进行分离纯化,并通过NMR、MS等波谱技术进行结构鉴定。结果从黄瑞香茎皮95%乙醇提取物中分离得到7个化合物,分别鉴定为正丁基丁香苷(1)、β-香树脂酮(2)、β-谷甾醇棕榈酸酯(3)、β-香树脂醇乙酸酯(4)、瑞香多林A(5)、狼毒双香豆素(6)、木犀草素(7)。结论化合物1为新化合物,化合物2～4、6为首次从瑞香属植物中分离得到,化合物7为首次从该植物中获得。     

长梗瑞香的化学成分

目的：研究长梗瑞香地上部分化学成分。方法：应用硅胶柱色谱，Sephadex LH-20柱色谱的方法分离和纯化化合物。通过光谱方法及理化性质鉴定化合物结构。结果：从长梗瑞香中分离得到8个化合物，分别鉴定为瑞香素（1）、双白瑞香素（2）、瑞香新素（3）、异瑞香新素（4）、左旋松脂酚（5）、瑞香醇酮（6）、β-谷甾醇（7）、胡萝卜苷（8）。结论：所有化合物均为首次从该植物中分得。     

山辣子皮根茎化学成分研究

目的:研究山辣子皮Daphne papyracea var.crassiuscula根茎的化学成分.方法:对山辣子皮根茎75％乙醇提取物的乙酸乙酯部分进行反复硅胶、反相硅胶柱色谱分离,并运用波谱学方法对化合物结构进行鉴定.结果:从瑞香属植物山辣子皮根茎中分离得到8个化合物,分别鉴定为瑞香新素(1),瑞香素(2),7-羟基-8-甲氧基香豆素(3),西瑞香素(4),1-4’-羟基苯基-5-苯基-2(E)-烯-1-戊酮(5),瑞香醇酮(6),β-香树脂醇醋酸酯(7)和(+)-松萝酸(8).结论:化合物1～8为首次从山辣子皮中得到,化合物8首次从该属植物中得到.     

金边瑞香化学成分

目的:对金边瑞香的化学成分进行研究.方法:采用硅胶,ODS,Sephadex LH-20柱色谱等方法对金边瑞香70%乙醇提取所得褐色固体析出物进行化学成分研究,并采用UV,1H-NMR 13C-NMR,MS,CD等光谱技术鉴定其结构.结果:从金边瑞香中分离得到10个化合物,经鉴定为荛花醇B(1)、山奈酚(2)、瑞香黄烷B(3)、瑞香黄烷D2(4)、瑞香黄烷A(5)、瑞香黄烷C(6)、瑞香黄烷D1(7)、瑞香黄烷I(8)、瑞香素(9),双白瑞香素(10).结论:化合物1,2,4为首次从金边瑞香中分离得到,其中化合物1为首次从该属植物中得到.     

长白瑞香的化学成分

目的：研究产自长白山地区的长白瑞香（Daphne koreana）的化学成分。方法：应用硅胶柱色谱,Sephadex LH-20和RP-18反相柱色谱的方法分离和纯化化合物,通过光谱方法及理化性质鉴定化合物结构。结果：从长白瑞香氯仿部位分离得到10个化合物,分别为：双白瑞香苷（1）,7-甲氧基-木犀草素-5-O-β-D-葡萄糖苷（2）,樱花苷（3）,芫花苷（4）,瑞香新素（5）,异瑞香新素（6）,5-去甲氧基瑞香新素（7）,紫丁香苷（8）,左旋松脂酚（9）,左旋松脂酚-4-O-β-D-葡萄糖苷（10）。结论：所有化合物均为首次从该植物中分得。     

毛瑞香化学成分研究

目的:研究毛瑞香的化学成分。方法:应用色谱技术进行分离和纯化,通过光谱方法鉴定其化学结构。结果:得到16个化合物,鉴定其中的9个,分别为β谷甾醇(Ⅰ),对羟基苯甲酸乙酯(Ⅱ),反式2-丙烯酸3(3,4-二羟基苯基)二十二烷酯(Ⅲ),5,4′二羟基-7-甲氧基黄酮(即芫花素)(Ⅳ),2,4-二羟基嘧啶(Ⅴ),瑞香素(Ⅵ),双白瑞香素(Ⅶ),5,7,4′-三羟基黄酮-3醇(Ⅷ),β-胡萝卜苷(Ⅸ)。结论:化合物Ⅱ,Ⅲ,Ⅳ,Ⅴ,Ⅵ,Ⅷ,Ⅸ为首次从该植物中分得。     

溪黄草的化学成分研究

目的:对溪黄草的化学成分进行研究.方法:利用萃取,硅胶、凝胶和反相硅胶柱色谱以及高效液相色谱法进行分离和纯化,采用波谱学技术(1D和2D NMR.MS,IR等)进行结构鉴定.结果:分离并鉴定出6个化合物,分别是ent -1α,7α,14β,20-tetrahydroxy-11,16-kauradien- 15 -one(1),kamebakaurin(2),dihydrokamebakaurin(3),rabdoinflexin A (4),胡萝卜苷(5),β-谷甾醇(6).结论:其中化合物1为新化合物,化合物3为首次从该植物中分离得到.     

Effect of feeding Mucuna pruriens on helminth parasite infestation in lambs

Ethnopharmacological relevance

Mucuna pruriens is a tropical legume anecdotally reputed to have anthelmintic properties. This study was conducted to examine the validity of such claims.

Aim of the study

The aim of this study was to determine if ingestion of Mucuna seeds reduces helminth parasite infestation in lambs.

Materials and methods

Thirty-six Dorper × Katahdin ram lambs were assigned to three treatments, a cottonseed meal based control diet, a diet in which Mucuna replaced cottonseed meal and the control diet with levamisole (7.5 mg/kg body weight) administration. All diets were isonitrogenous and isocaloric. The 12 lambs in each treatment were assigned randomly to 4 pens, each containing 3 lambs. Lambs were trickle infected three times per week by gavage with infectious Haemonchus contortus larvae (2000 larvae/lamb) for 3 weeks.

Results

Levamisole treatment decreased fecal egg counts by 87% and abomasal worm counts by 83%. Mucuna intake did not statistically affect fecal egg counts or abomasal worm counts, though numerical (P > 0.10) reductions of 7.4% and 18.1%, respectively were evident. Anemia indicators, feed intake, and lamb growth were unaffected by treatment.

Conclusions

Levamisole reduced the Haemonchus parasite burden in lambs significantly but feeding Mucuna reduced the burden by levels unlikely to eliminate the clinical effects of parasitism.     

Investigation of plant extracts in traditional medicine of the Brazilian Cerrado against protozoans and yeasts

Aim of the study

To investigate the activities of the 217 plant extracts in traditional medicine of the Brazilian Cerrado against protozoans and yeasts.

Materials and methods

Plant extracts were prepared by the method of maceration using solvents of different polarities. The growth inhibition of chloroquine-resistant Plasmodium falciparum strain (FcB1) was determined by measuring the radioactivity of the tritiated hypoxanthine incorporated. Activity against Leishmania (Leishmania) chagasi and Trypanosoma cruzi was measured by the MTT colorimetric assay. The antifungal tests were carried out by using the CLSI method. The active extracts were tested also by cytotoxicity assay using NIH-3T3 cells of mammalian fibroblasts.

Results

Two hundred and seventeen extracts of plants were tested against Plasmodium falciparum. The eleven active extracts, belonging to eight plant species were evaluated against L. (L.) chagasi, Trypanosoma cruzi, yeasts and in NIH-3T3 cells. The results found in these biological models are consistent with the ethnopharmacological data of these plants. The ethyl acetate extract of Diospyros hispida root showed IC₅₀ values of 1 μg/mL against Plasmodium falciparum. This extract demonstrated no toxicity against mammalian cells, resulting in a significant selectivity index (SI) of 435.8. The dichloromethane extract of Calophyllum brasiliense root wood was active against Cryptococcus gattii LMGO 01 with MIC of 1.95 μg/mL; and Candida albicans ATCC 10231 and Candida krusei LMGO 174, both with MIC of 7.81 μg/mL. The same extract was also active against Plasmodium falciparum and L. (L.) chagasi with IC₅₀ of 6.7 and 27.6 μg/mL respectively. The ethyl acetate extract of Spiranthera odoratissima leaves was active against Cryptococcus gattii LMGO 01 with MIC of 31.25 μg/mL, and against Plasmodium falciparum with IC₅₀ of 9.2 μg/mL and Trypanosoma cruzi with IC₅₀ of 56.3 μg/mL.

Conclusion

The active extracts for protozoans and human pathogenic yeasts are considered promising to continue the search for the identification and development of leading compounds.     

真菌的中药干预研究近5年进展

近年来真菌感染率逐年上升,传统抗真菌药物易产生耐药性,而中药在防治真菌感染方面具有一定的优势。本文就近5年来中药对白念珠菌、皮肤癣菌、曲霉菌、马拉色菌、串珠镰孢菌、申克孢子丝菌、新生隐球菌及真菌生物膜的干预研究进展进行综述。     

α-Glucosidase inhibitory activity of selected Philippine plants

Ethnopharmacological relevance

Antidesma bunius Spreng. (Phyllantaceae), Averrhoa bilimbi L. (Oxalidaceae), Biophytum sensitivum (L.) DC. (Oxalidaceae), Ceriops tagal (Perr.) C.B. Rob. (Rhizophoraceae), Kyllinga monocephala Rottb. (Cyperaceae), and Rhizophora mucronata Lam. (Rhizophoraceae) are used as remedies to control diabetes. In the present study, these plants were screened for their potential α-glucosidase inhibitory activity.

Materials and methods

The 80% aqueous ethanolic extracts were screened for their α-glucosidase enzyme inhibitory activity using yeast alpha glucosidase enzyme.

Results

Except for A. bilimbi with IC₅₀ at 519.86±3.07, all manifested a significant enzyme inhibitory activity. R. mucronata manifested the highest activity with IC₅₀ at 0.08±1.82 μg mL⁻¹, followed by C. tagal with IC₅₀ at 0.85±1.46 μg mL⁻¹ and B. sensitivum with IC₅₀ at 2.24±1.58 μg mL⁻¹.

Conclusion

This is the first report on the α-glucosidase inhibitory effect of the six Philippine plants; thus, partly defining the mechanism on why these medicinal plants possess antidiabetic properties.     

European medicinal polypores – A modern view on traditional uses

Ethnopharmacological relevance

In particular five polypore species, i.e. Laetiporus sulphureus, Fomes fomentarius, Fomitopsis pinicola, Piptoporus betulinus, and Laricifomes officinalis, have been widely used in central European folk medicines for the treatment of various diseases, e.g. dysmenorrhoea, haemorrhoids, bladder disorders, pyretic diseases, treatment of coughs, cancer, and rheumatism. Prehistoric artefacts going back to over 5000 years underline the long tradition of using polypores for various applications ranging from food or tinder material to medicinal–spiritual uses as witnessed by two polypore species found among items of Ötzi, the Iceman. The present paper reviews the traditional uses, phytochemistry, and biological activity of the five mentioned polypores.

Materials and methods

All available information on the selected polypore taxa used in traditional folk medicine was collected through evaluation of literature in libraries and searches in online databases using SciFinder and Web of Knowledge.

Results

Mycochemical studies report the presence of many primary (e.g. polysaccharides) and secondary metabolites (e.g. triterpenes). Crude extracts and isolated compounds show a wide spectrum of biological properties, such as anti-inflammatory, cytotoxic, and antimicrobial activities.

Conclusions

The investigated polypores possess a longstanding ethnomycological tradition in Europe. Here, we compile biological results which highlight their therapeutic value. Moreover, this work provides a solid base for further investigations on a molecular level, both compound- and target-wise.     

厚朴与凹叶厚朴群体遗传学研究

目的:对厚朴与凹叶厚朴的群体遗传学进行研究,为中药厚朴的质量控制提供分子生药学方面的依据。方法:对厚朴与凹叶厚朴15个居群应用2个叶绿体基因间序列psbA-trnH和trnL-trnF进行PCR扩增并测序,计算厚朴与凹叶厚朴单倍型频率,用程序HaploNst分析遗传多样性和遗传结构,应用TCS version 1.13软件构建单倍型网状进化树。结果:厚朴与凹叶厚朴均无特有单倍型存在,但单倍型频率存在显著差异,已开始出现遗传分化的趋势,NST略大于GST。结论:厚朴与凹叶厚朴在遗传上已出现遗传分化的趋势,但尚未完全分化成彼此独立的单系。     

Antiplasmodial activity of extracts from seven medicinal plants used in malaria treatment in Cameroon

Aim of the study

In a search for new plant-derived biologically active compounds against malaria parasites, we have carried out an ethnopharmacological study to evaluate the susceptibility of cultured Plasmodium falciparum to extracts and fractions from seven Cameroonian medicinal plants used in malaria treatment. We have also explored the inhibition of the Plasmodium falciparum cysteine protease Falcipain-2.

Materials and methods

Plant materials were extracted by maceration in organic solvents, and subsequently partitioned or fractionated to afford test fractions. The susceptibility of erythrocytes and the W2 strain of Plasmodium falciparum to plant extracts was evaluated in culture. In addition, the ability of annonaceous extracts to inhibit recombinant cysteine protease Falcipain-2 was also assessed.

Results and discussion

The extracts showed no toxicity against erythrocytes. The majority of plant extracts were highly active against Plasmodium falciparumin vitro, with IC₅₀ values lower than 5 μg/ml. Annonaceous extracts (acetogenin-rich fractions and interface precipitates) exhibited the highest potency. Some of these extracts exhibited modest inhibition of Falcipain-2.

Conclusion

These results support continued investigation of components of traditional medicines as potential new antimalarial agents.     

中国石斛属植物文献计量研究

石斛是珍稀濒危中药材,目前正处于快速发展阶段。为全面了解我国石斛属植物研究的历史和发展现状,作者以1954～2010年"中国知网中国学术期刊网络出版总库"收录的石斛研究文献为依据,采用文献计量学的原理和方法,对我国石斛属植物研究文献从文献年代分布、期刊分布与被引频率、主题分布、研究对象分布、作者与研究机构分布等方面进行了统计与分析。结果表明,我国石斛研究明显分为起步(2个)、停滞、平稳发展、快速上升5个阶段;期刊分布存在离散性与集中性并存的现象,已形成核心期刊研究群,并以《中国中药杂志》、《中草药》和《陕西中医》为代表;研究主题广泛涉及临床与药理、组织培养与种苗繁育、成分分析等多个领域,已经形成比较稳定的研究机构和团队,但研究对象差异显著,以铁皮石斛、金钗石斛和霍山石斛最为集中。我国石斛属植物的研究已取得显著成果,但种植产业发展缓慢,供需矛盾突出,预计种苗繁育与人工种植、产品开发、化学与药理等方面是未来的研究热点,其文献报道仍将进一步上升。     

列当属、肉苁蓉属和草苁蓉属植物传统药物学调查

通过野外资源调查、整理各大标本馆标本原始记录和查阅文献记载等方法,系统整理、总结、归纳了列当属、肉苁蓉属和草苁蓉属民族药用植物种类、功效及民间使用情况,结果表明列当属6种药用植物在4个少数民族间作为7种民族药应用,草苁蓉属2种药用植物在8个少数民族间作为10种民族药应用,肉苁蓉属2种药用植物在3个少数民族间作为3种民族药应用,且同种药用植物常作不同民族药;发现3属植物的传统疗效主要集中在补肾壮阳、止血和止痛3个方面,并且该传统疗效与现代药理研究结果基本吻合。因此深入研究植物种类丰富的列当属植物资源对缓解肉苁蓉植物资源匮乏局面和扩大药源具有积极意义。     

金银花类药用植物IspE和IspH基因克隆和生物信息学分析

目的:克隆金银花类药用植物4-二磷酸胞苷-2-C-甲基赤藓糖激酶(4-diphosphocytidyl-2-C-methyl-D-erythritol kinase,IspE)和4-羟基-3-甲基-2-邻苯基二磷酸还原酶(4-hydroxy-3-methylbut-2-enyl diphosphate reductase,IspH)基因,并对其基因序列、蛋白特性和转录活性进行分析、比较.方法:从忍冬Lonicera japonica转录组测序结果中分析获得了IspE,IspH基因.分别以忍冬、红白忍冬L.japonica var.chinensis、红腺忍冬L.hypoglauca和水忍冬L.dasystyla新鲜花蕾为材料,利用RT-PCR技术克隆获得了4种金银花类药用植物IspE和IspH基因的全长cDNA.运用生物信息学分析软件,预测编码蛋白的结构和功能,并通过RT-PCR检测IspE和IspH在忍冬、红白忍冬、红腺忍冬、水忍冬花蕾中的转录情况.结果:金银花类药用植物IspE基因含有1个完整的开放阅读框,长度为1 221 bp,编码406个氨基酸;IspH含有一个完整的开放阅读框,长度为1 380 bp,编码459个氨基酸.IspE和IspH均为非分泌蛋白,均定位于叶绿体中.RT-PCR分析结果表明在忍冬、红腺忍冬和水忍冬的花蕾中IspE,IspH基因的转录水平没有显著差异,但红白忍冬花蕾中IspE,IspH基因的转录水平均显著高于忍冬.结论:克隆获得忍冬、红白忍冬、红腺忍冬和水忍冬中IspE,IspH基因,并证实了其在不同金银花类药用植物中的表达,为进一步研究IspE,IspH基因对萜类化合物生物合成和花香气以及颜色的影响奠定了基础.