大黄中4种蒽醌类化合物抑幽门螺杆菌效果比较

 目的:对4种大黄蒽醌化合物抑制幽门螺杆菌( Helicobacter pylori )进行实验研究。方法:用梯度碱提取法，将大黄中的4种蒽醌类化合物提取，然后用试管稀释法和纸片扩散法，分别观察其对幽门螺杆菌的抑菌效果。结果:4种大黄蒽醌，最低抑菌浓度及抑制幽门螺杆菌环分别为:大黄素(emodin) 0.40μg· ml^{-1(30mm,强)、大黄酸(rhein)0.60μg·ml-1(28mm,强)、大黄酚(chrysophanol ) 0.78μg·ml-1(24mm,强)、芦荟大黄素(aloe-emodin)0.85μg·ml-1(23mm,强)。衬照品大黄提取物(Rheum officinale extracts)仅为17.24μg·ml-1(15mm，中)。空白对照为灭菌注射用水，无抑菌环，幽门螺杆菌生长正常。结论:4种大黄蒽醌类化合物对幽门螺杆菌均有较强的抑制生长作用。}     

HPLC法测定不同产地大黄中四种蒽醌类化合物含量

目的:测定不同产地大黄中的蒽醌类化合物的含量.方法:以Kromasil ODS2-1(5μm,4.6mm×250mm)为色谱柱,甲醇-水-冰醋酸(92:8:0.4)为流动相,检测波长为254nm.结果:各组分得到良好分离,平均回收率为98.4%～100.6%,RSD为2.1%～2.8%.测得正品中大黄芦荟大黄素0.28%～0.56%,大黄酸0.32%～0.84%,大黄素0.16%～0.61%,大黄酚0.44%～1.3%,波叶大黄和圆叶大黄不含芦荟大黄素.     

藏边大黄的蒽醌类化合物研究

实验结果表明藏边大黄含有正品大黄所特有的5种蒽醌甙元,且含量(2.24%)明显地高于正品大黄(平均为0.699%)。     

大黄蒽醌类化合物抗炎作用研究进展

炎症是机体对有害应激源的过度防御反应,用于定位并消除伤害的内源或外源。它涉及急性期反应物的释放,会引起机体广泛的自主神经、内分泌、血液学、免疫学改变。失调的细胞因子可能引起大量的炎症级联反应,从而导致多器官功能障碍综合征。目前常用的抗炎药物由于临床发生胃肠道损伤等不良反应的影响而受到极大的限制。大黄常见的蒽醌类化合物包括大黄酸、大黄素、大黄酚、芦荟大黄素、大黄素甲醚等,具有良好的抗炎活性,对胃肠道的损害较小,临床应用潜力巨大。目前关于大黄及其蒽醌类化合物抗炎作用的研究较多,本文对大黄及常见的几种蒽醌类化合物抗炎作用和机理,及其在炎症治疗中的实际应用进行综述,以期为大黄蒽醌类化合物与炎症的基础研究和临床应用提供参考。     

HPLC测定黄连上清丸中5种大黄蒽醌类化合物的含量

目的:建立黄连上清丸中芦荟大黄素、大黄酸、大黄素、大黄酚和大黄素甲醚的含量测定方法。方法:采用Zorbax SB-C18色谱柱(4.6 mm×150 mm,5μm);流动相为乙腈(A)-0.1%磷酸(B),梯度洗脱;流速为1.0 mL.min-1;柱温为40℃;5种大黄蒽醌类化合物被有效分离,检测波长为226 nm。结果:芦荟大黄素、大黄酸、大黄素、大黄酚和大黄素甲醚分别在0.010~0.200μg、0.010~0.200μg、0.092~0.184μg、0.010~0.200μg、0.005~0.100μg范围内呈良好的线性关系,平均回收率为91.11%、93.52%、97.16%、97.89%、93.62%。结论:该方法简单、准确、重复性好,可为黄连上清丸的质量控制提供参考。     

271 蒽醌类化合物测定的研究进展

综述大黄素等蒽醌类化合物的测定方法的最新进展,包括HPLC、HPLC-MS、荧光分析法、HPCE,评述了每种分析方法的特点和适用范围,为富含蒽醌类化舍物的药材和制剂量评价提供参考.     

番泻中番泻苷及蒽醌类的含量及自然干燥后的变化

对不同地区栽培的番泻（ Cassia angustifolia）小叶、叶轴及茎等部位以及采集后不同时间番泻苷（Scnnoside） A （SA） ;及 B （SB）、大黄酸、芦荟大黄素、大黄酚和大黄素的含量进行测定，探讨其特征差异以及加热后SA及SB的含量变化。     

虎杖药材中蒽醌衍生物及其苷类成分的测定

目的:建立虎杖药材中芦荟大黄素,大黄酸,大黄素和大黄素甲醚含量测定方法.方法:采用高效液相色谱方法,以甲醇-1%高氯酸水溶液(85:15)为流动相,检测波长:220 nm.结果:操作方便,结果准确,可供本品质量控制.     

HPLC法同时测定大鼠体内5种大黄蒽醌类化合物

目的建立同时测定芦荟大黄素、大黄酸、大黄素、大黄酚和大黄素甲醚在大鼠血浆、尿液、粪便中含有量的HPLC法。方法分析采用Agilent Eclipse Plus-C18色谱柱(250 mm×4.6 mm,5μm);流动相分别为甲醇-1%甲酸水(78∶22);体积流量1.0 mL/min,检测血浆与尿液,以及甲醇-1%甲酸水(75∶25),体积流量0.8 mL/min,检测粪便;检测波长为254 nm;柱温为30℃。结果芦荟大黄素、大黄酸、大黄素、大黄酚和大黄素甲醚均呈现良好的线性关系,平均回收率(n=6)达到70%以上,RSD值均在12.6%以下。结论该方法可用于体内大黄蒽醌类成分的测定。     

A Distinctive Pattern of Beauveria bassiana‐biotransformed Ginsenoside Products Triggers Mitochondria/FasL‐mediated Apoptosis in Colon Cancer Cells

Ginseng is one of the most commonly used adaptogens. Transformation into the minor ginsenosides produces compounds with more effective action. Beauveria bassiana, a teleomorph of Cordyceps bassiana, is a highly efficient producer of mammalian steroids and produces large amounts of sugar‐utilizing enzymes. However, the fermentation of steroid glycosides in ginseng with B. bassiana has never been studied. Thus, we evaluated the bioconversion of the major ginsenosides in white ginseng by B. bassiana. Interestingly, B. bassiana increased the total amount of protopanaxadiols and hydrolyzed Rb1 into minor ginsenosides, exhibiting high levels of Rd and Rg3, as well as moderate levels of Rb2 and Rc analyzed by high‐performance liquid chromatography coupled with evaporative light‐scattering detection. The β‐glucosidase activity was highly increased, which led to the selective elimination of sugar moiety at the 20‐C position of Rb1 to Rd, followed by Rg3. Rb2 and Rc accumulated because of the minimal activities of α‐L‐arabinopyranosidase and α‐L‐arabinofuranosidase, respectively. The fermentation product exerted dose‐dependent cytotoxicity in HCT‐15 cells, which are resistant to ginseng. The product, but not white ginseng, exhibited apoptotic effects via the Fas ligand and caspase 8/9. This study demonstrates for the first time that the B. bassiana‐fermented metabolites have potent apoptotic activity in colon cancer cells, linking to a therapeutic use. Copyright © 2015 John Wiley & Sons, Ltd.     

HPLC同时测定新健胃包芯片中5种蒽醌类成分的含量

目的:建立HPLC法测定新健胃包芯片中5种蒽醌类成分的含量。方法:色谱柱:Diamonsil C8柱,流动相:甲醇(A)-0.3%磷酸(B)梯度洗脱,柱温:25℃,流速:1.0mL·min-1,检测波长:430nm。结果:芦荟大黄素、大黄酸、大黄素、大黄酚、大黄素甲醚平均回收率(n=9)分别为99.5%,97.7%,105.4%,100.1%,106.1%,RSD值分别为1.15%,1.76%,1.79%,1.74%,1.93%;芦荟大黄素、大黄酸、大黄素、大黄酚、大黄素甲醚分别在进样量为0.041～0.205、0.041～0.202、0.049～0.245、0.097～0.484、0.042～0.212μg与峰面积呈良好线性关系。结论:该方法简便、灵敏、结果准确可靠,适用于该制剂中蒽醌类成分的质量控制。     

Microbial transformation of amino- and hydroxyanthraquinones by Beauveria bassiana ATCC 7159

Microbial biotransformation of four amino- and hydroxyanthraquinones catalyzed by Beauveria bassiana ATCC 7159 has been studied. Incubation of 1,2-diaminoanthraquinone (1) with B. bassiana ATCC 7159 afforded 1-amino-2-(4'-O-methyl-2beta-N-D-glucopyranosylamino)anthraquinone (5) in a hitherto unprecedented biotransformation involving N-glycosylation of an amine. Biotransformation of 1-aminoanthraquinone (2) yielded 1-amino-2-(4'-O-methyl-2beta-O-D-glucopyranosyloxy)anthraquinone (6) as a result of microbial hydroxylation of C-2 followed by 4'-O-methyl-glucosylation of the newly introduced hydroxyl group. 1,8-Dihydroxyanthraquinone (3) and 1,2-dihydroxyanthraquinone (4) afforded 8-hydroxy-1-(4'-O-methyl-1beta-O-D-glucopyranosyloxy)anthraquinone (7) and 1-hydroxy-2-(4'-O-methyl-2beta-O-D-glucopyranosyloxy)anthraquinone (8), respectively, resulting from 4'-O-methyl-glucosylation of the existing hydroxyl groups of the substrates. The efficiency of these conversions suggests that microbial biotransformation reactions offer an attractive alternative to chemical 4'-O-methyl-glucosylation of amino- and hydroxyanthraquinones.     

球孢白僵菌、少根根霉和产黄青霉对广藿香醇生物转化的作用研究

目的应用生物转化法对广藿香醇的进行羟基化修饰。方法选择真菌球孢白僵菌、少根根霉和产黄青霉对广藿香醇进行生物转化。转化产物经过凝胶、硅胶柱层析及制备型高效液相色谱法分离纯化,进而采用MS、NMR技术鉴定转化产物结构。结果广藿香醇经球孢白僵菌转化得到3个产物,分别为12-羟基广藿香醇(1)、8S-羟基广藿香醇(2)以及5R-羟基广藿香醇(3);经少根根霉转化得到3个产物,分别为3R-羟基广藿香醇(4)、8S-羟基广藿香醇(2)以及5R-羟基广藿香醇(3);经产黄青霉转化得到2个产物,分别为6R-羟基广藿香醇(5)和7S-羟基广藿香醇(6)。结论化合物1~6均为广藿香醇的羟基化衍生物。     

Microbial transformations of aryltetralone and aryltetralin lignans by Cunninghamella echinulata and Beauveria bassiana

Microbiological transformation of the aryltetralone lignan (-)-8'-epi-aristoligone (1) with Cunninghamella echinulata ATCC 10028B afforded two known natural lignans, (-)-holostyligone (3) and (-)-arisantetralone (4). Incubation of the aryltetralin lignan (-)-isogalbulin (2), obtained by chemical transformation of 1, with C. echinulata ATCC 10028B afforded the known lignan aryltetralol (5) and seven new metabolites, (-)-8-hydroxyisogalbulin (6), (-)-7-methoxyisogalbulin (7), (-)-4'-O-demethyl-8-hydroxyisogalbulin (8), (-)-7-methoxy-8-hydroxyisogalbulin (9), (-)-4'-O-demethyl-7-methoxyisogalbulin (10), (-)-4',5-O-didemethylcyclogalgravin (11), and (-)-4'-O-demethylcyclogalgravin (12). When 2 was subjected to biotransformation with Beauveria bassiana ATCC 7159, (-)-8-hydroxyisogalbulin (6) was the only isolable product. The structures of all new compounds were established by detailed analysis of their spectroscopic data.     

千层塔中的一个新黄酮苷

目的：研究千层塔（Huperzia serrata）化学成分。方法：采用柱层析方法分离纯化,根据理化性质和光谱数据鉴定化合物的结构。结果：分离鉴定了1个黄酮苷为5,5′-dihydroxy-2′,4′–dimethoxy-flavone-7-O-β-D-（6″-O-Z-p-coumaroyl）-glu-copyranoside（1）。结论：化合物1为新化合物。     

A New Secoiridoid Glycoside from Swertia cincta

Objective To study the chemical constituents of Swertia cincta.Methods Preparative liquid chromatography was employed.The structures of the compounds were elucidated by spectroscopic analysis.Results Three secoiridoid glycosides were isolated from S.cincta and identified as 8-methoxyl-eustomorusside(1),secoiridoids eustomorusside(2),and eustomoside(3).Conclusion Compound 1 is a new secoiridoid glycoside.Compounds 2 and 3 are isolated from this plant for the first time.     

A New Furan Flavonol Glycoside from Epimedium koreanum

Objective To study the chemical constituents of Epimedium koreanum.Methods Separation was carried out through silica gel and Sephadex LH-20 column chromatography and HPLC method.The chemical structures were elucidated by spectroscopic method including 1D-NMR and 2D-NMR.Results A new furanflavonol glycoside(1)was isolated and identified.Conclusion Compound 1 is a new furanflavonol glycoside,and its structure is corroborated as 5,4′-dihydroxyfurano[2″,3″:7,8]flavonol 3-O-α-L-rhamnoside.     

A New Secoiridoid Glycoside from Roots of Picrorhiza scrophulariiflora

Objective To study the chemical constituents in the roots of Picrorhiza scrophulariiflora.Methods The chemical constituents in the roots of P.scrophulariiflora were separated and purified with chromatographic methods.The structures were elucidated by spectroscopic methods and chemical analyses.Results A new secoiridoid glycoside,picrogentioside II(1)was successfully isolated from the roots of P.scrophulariiflora.Conclusion Compound 1 is a new secoiridoid glycoside.     

A New Sesquiterpenoid Glycoside from Rhizomes of Atractylodes lancea

Objective To study the water-soluble chemical constituents from the rhizomes of Atratylodes lancea. Methods Two sesquiterpenoid glycosides were purified by column chromatography and their structures were determined by spectroscopic analysis. They were also evaluated for anti-inflammatory activity by determining the inhibitory activity on LPS-induced NO and PGE2 generation in RAW 264.7 cell lines. Results Compound 1 was a new sesquiterpenoid glycoside, named as(1S,4S,5R,7R,10S)-4,11,14-trihydroxyguai-3-one-11-O-β-D-glucopyranoside, but exhibited no appreciable activity. Compound 2 was atractyloside A and showed weak activity. Conclusion The hydroxyl group at C-10 of guaiol-type glycoside could be important for anti-inflammatory activity.