Influence of Hypericum perforatum Extract on Piglet Infected with Porcine Respiratory and Reproductive Syndrome Virus

To study the influence of Hypericum perforatum extract （HPE） on piglets infected with porcine respiratory and reproductive syndrome virus （PRRSV）, enzyme-labeled immunosorbent assay （ELISA） and cytopathic effect （CPE） were used to determine in vitro whether HPE could induce swine pulmonary alveolar macrophages （PAMs） to secrete IFN-γ, and whether PRRSV titers in PAMs were affected by the levels of HPE-induced IFN-γ. HPE （200 mg·kg-1） was administrated by oral gavage to piglets infected with the PRRSV in vivo to observe whether HPE affected the viremia, lung viral titers, and weight gain of piglets infected with PRRSV. The results showed that HPE was capable of inducing PAMs to produce IFN-γ in a dose dependent manner and HPE pretreatment was capable of significantly reducing PRRSV viral titers in PAMs （P〈 0.01）. Administration of HPE to the PRRSV-infected animals significantly （P〈 0.05） reduced viremia over time as compared with the PRRSV-infected animals. But there was not significant decrease in lung viral titers at day 21 post-infection between the HPE- treated animals and the PRRSV-infected control piglets. There were no significant differences in weight gain over time among the HPE-treatment animals, the normal control, and the HPE control animals. The PRRSV-infected animals caused significant （P〈 0.01） growth retardation as compared with the HPE controls and the normal piglets. It suggested that HPE might be an effective novel therapeutic approach to diminish the PRRSV-induced disease in swine.

In vitro Anti-Hepatitis B Virus Effect of Hypericum perforatum L.

The anti-hepatitis B virus(HBV)effects and its mechanisms of the ethanol extracts of Hypericum perforatum L.(EHP)in vitro were explored.HepG2 2.2.15 cells,a stable HBV-producing cell line,were cultured as the model system to observe the anti-HBV effect.The viral antigens of cellular secretion,HBsAg and HBeAg,were determined by enzyme linked immunosorbent assay(ELISA).The quantity of HBV-DNA released in the supernatant was assayed by real-time PCR.In order to understand the mechanisms of the suppression of H...

Anti-Influenza A Virus Effect of Hypericum perforatum L. Extract

To study the antiviral effect of Hypericum perforatum L. extract (HPE) on influenza A virus (IAV) (H1N1) in vitro and in vivo. Cytopathic effect (CPE) and neutral red (NR) dye uptake were used to examine the antiviral effect of HPE on Madin Darby Canine Kidney (MDCK) cells which were infected with IAV in vitro. HPE was effective against influenza A virus (IAV) in vitro, with a 50% effective concentration (EC50) of 40 μg/mL. The mean 50% cytotoxic concentration (CC50) in the MDCK used in these experiments was 1.5 mg/mL. Ribavirin was run in parallel with EC50 values of 5.0 μg/mL; the mean CC50 for ribavirin was 520 μg/mL. Oral gavage administrations of HPE or ribavirin to mice infected with the IAV were highly effective in preventing death, slowing the decline of arterial oxygen saturation, inhibiting lung consolidation and reducing lung virus titers. The minimum effective dose of HPE in these studies was 31.25 mg/kg/day, which was administered twice daily for 5 d beginning 4 h prior to virus exposure. Below a dosage of 2000 mg/kg/day, almost all treated mice survived, which suggests that HPE is of low toxicity. Ribavirin’s minimum effective dose was 40 mg/kg/day with the LD50 determined to be 200 mg/kg/day. Delay of the initiation of either HPE or ribavirin therapy, using approximately 1/3 LD50 dose each time, could still be protective as late as 48 h after exposure to the IAV. While both agents appeared to have similar efficacy against IAV infections, HPE was considered to be less toxic and may warrant further evaluation as a possible therapy for influenza.

Recent enhancement of the immunity in AIDS and other immunocompromised patients by hyperforin an antibiotic from <i>Hypericum perforatum</i>L. (<i>in vitro</i>model) part I

Today, Hypericum perforatum L. is probably one of the best-characterized medicinal plants, and hyperforin is its best-characterized constituent. Extracts from H. perforatum are widely used as antidepressants;however, less attention has been given to other properties of hyperforin, such as antitumor, fungicidal, antiviral and antibacterial action, or its possible use as a substance with immunomodulation properties. The present study summarizes results that describe the influence of hyperforin as an immunomodulation agent on phagocytosis and the breakdown of Escherichia coli by human polymorphonuclear neutrophils (PMNs). Hyperforin at 1 - 100 μg/mL concentrations was found to have a major influence on phagocytosis and the breakdown of E. coli by PMNs in vitro. A 100 μg/mL solution of hyperforin increased the uptake of non-opsonized E. coli almost 50-fold, and the uptake of IgG-opsonized E. coli more than threefold;on the other hand, the uptake of serum-opsonized bacteria was reduced to approximately 60% of that of the control. Hyperforin seems to bind to both PMNs and E. coli and acts like an opsonin. The elimination of remnants of IgG-opsonized E. coli from the PMNs was stimulated by hyperforin, while the elimination of remnants from non-op-so nized and serum-opsonized material was unaffected by the drug. Hyperforin exhibited clear immunomodulation ability as a phagocytosisstimulating agent. Hyperforin is probably inactive against human immunodeficiency virus (HIV) and most Gram-negative bacteria. However, it can protect acquired immunodeficiency syndrome (AIDS) patients and other immunocompromised patients by its antibacterial activity against Gram-positive bacteria and by enhancement of phagocytosis of Gram-positive and Gram-negative bacteria;some Gram-negative bacteria, such as Neisseria, are sensitive to hyperforin. Hyperforin has the ability to penetrate the blood-brain barrier (BBB) and blood-testis barrier (BTB) and is a valuable antibacterial agent against meningitis and gonorrhea. These properties of hyperforin are important for an antibiotic with immunomodulation activity in the struggle against the growing mortality in AIDS patients as a result of opportunistic bacteria, as recently shown by Bekondi et al. (2006, Int. J. Infect. Dis. 10, 387-395). It could also help to combat primary and opportunistic pathogens associated with meningitis in adults' relation to HIV serostatus.

贯叶金丝桃二氯甲烷部位的化学成分研究

目的研究贯叶金丝桃Hypericum perforatum L.二氯甲烷部位的化学成分。方法贯叶金丝桃二氯甲烷部位采用硅胶、ODS、Sephadex LH-20、半制备HPLC等进行分离纯化,根据理化性质及波谱数据鉴定所得化合物的结构。结果从中分离得到11个化合物,分别鉴定为贯叶金丝桃降碳聚酮A(1)、α-芒柄花醇(2)、(3 R)-thunberginol(3)、2-geranyloxy-1-(2-methylpropanoyl)-phloroglucinol(4)、4,6-dihydroxy-2-O-(3″,7″-dimethyl-2″,6″-octadienyl)-1-(2′-methylbutanoyl)benzene(5)、norhyperpalum G(6)、garsubellin A(7)、garsubellin B(8)、(2″R/S)-kellerine C(9)、kobusone(10)、圣草酚(11)。结论化合物1为新化合物,化合物2~3为首次在藤黄科植物中分离得到,化合物4~10为首次从该植物中分离得到。

贯叶金丝桃提取物对急性缺氧大鼠肝肾损伤的改善作用

【目的】研究贯叶金丝桃提取物(Hypericum perforatum extract,HPE)对急性缺氧大鼠肝肾损伤的改善作用。【方法】通过小鼠常压密闭实验模型初步筛选HPE(20%乙醇提取物、70%乙醇提取物和95%乙醇提取物)的抗缺氧活性组分。进一步建立大鼠低压低氧肝、肾损伤模型:将80只健康大鼠随机分为8组,分别为常氧空白组(NG),缺氧模型组(HG),HPE低、中、高剂量组(HPE-L、HPE-M、HPE-H,100、200、400 mg/kg),金丝桃苷低、高剂量组(HYP-L、HYP-H,50、100 mg/kg)和醋酸地塞米松组(DXM,4 mg/kg)。观察HPE对急性缺氧大鼠肝、肾组织病理学变化的影响,并测定其中氧化应激指标和相关炎症因子的变化。【结果】与模型组比较,给予HPE干预后的大鼠肝、肾组织中丙二醛(MDA)和过氧化氢(H_(2)O_(2))含量下降(P<0.01,P<0.05),谷胱甘肽(GSH)含量增加(P<0.01,P<0.05),总超氧化物歧化酶(T-SOD)和过氧化氢酶(CAT)活力有所提高(P<0.01,P<0.05)。同时,大鼠肝、肾组织中炎症因子白细胞介素-1β(IL-1β)、白细胞介素-6(IL-6)、肿瘤坏死因子-α(TNF-α)和血管内皮生长因子(VEGF)的释放均被抑制(P<0.01,P<0.05)。【结论】HPE对急性缺氧大鼠肝、肾损伤具有一定程度的改善作用。

贯叶金丝桃化学成分的分离与鉴定

目的研究藤黄科(Guttiferae)金丝桃属(Hypericum)贯叶金丝桃(Hypericum perforatum L.)的化学成分。方法采用正相硅胶色谱、反相ODS色谱、凝胶色谱及高效液相色谱等多种色谱方法对贯叶金丝桃体积分数95%乙醇提取物进行分离纯化。利用紫外、红外、核磁共振光谱,高分辨质谱及X-ray单晶衍射法对化合物的结构进行鉴定。结果从贯叶金丝桃中分离鉴定8个化合物,分别为perforxanthone A(1)、8-hydroxy-1,2,3-trimethoxyxanthone(2)、绵马酚D(3)、(S)-5-hydroxy-3,4-dimethyl-5-pentylfuran-2(5H)-one(4)、ent-4(15)-eudesmene-1β,6α-diol(5)、methyl-(E)-8-oxooctadec-9-enoate(6)、模绕酮酸(7)、白桦脂酸(8)。结论化合物1为新的氧杂蒽酮类化合物,化合物2-7为首次从该植物中分离得到。

贯叶连翘的历史沿革、化学成分及药理作用研究进展

贯叶连翘是我国传统中药之一,在宋代之前作为连翘中的“小翘”应用于临床,为今之“贯叶金丝桃”的带根全草,具有收敛止血,清热解毒,利湿等功效。主要含有黄酮类、间苯三酚类、萘骈二蒽酮类、挥发油类、酚酸类等化学成分。现代药理研究表明贯叶连翘具有抗抑郁、抗菌、抗肿瘤、保肝及抗纤维化等作用,其药理作用的机制较为复杂,部分机制还有待进一步深入研究。本文对贯叶连翘历史沿革、化学成分、质量控制及药理作用等方面进行文献整理并展开综述,以期为贯叶连翘的药用部位扩展及后续深入开发研究提供参考和依据。

贯叶连翘的化学成分及降糖活性研究

目的:研究贯叶连翘Hypericum perforatum L.的化学成分及降糖活性。方法:运用硅胶柱色谱、ODS柱色谱、Sephadex LH-20葡聚糖凝胶柱色谱以及制备HPLC等多种方法对贯叶连翘地上部分95%乙醇提取物进行分离纯化,利用HR-ESI-MS、NMR等波谱技术对分离得到的化合物进行鉴定。通过体外α-葡萄糖苷酶活性抑制试验,测定化合物的降糖活性。结果:从贯叶连翘中分离得到14个化合物,分别鉴定为:北美芹素(1)、3′,4′-disenecioyl-cis-khellactone(2)、5,4′-二羟基-6,8-二甲基-7-甲氧基黄酮(3)、5,4′-二羟基-6-甲基-7-甲氧基黄酮(4)、5,7-二羟基-3-甲基色原酮(5)、5,7-二羟基-3-乙基色原酮(6)、2,4,6-三羟基苯甲酸乙酯(7)、香草醛(8)、7-hydroxy-5-methoxy-4,6-dimethylphthalidc(9)、α-生育醌(10)、豆甾醇(11)、乙酰-11-羰基-β-乳香酸(12)、阿魏酸二十六烷酯(13)、cosmosoic acid(14)。结论:其中,化合物1~4、10、12~14为首次从金丝桃属植物中分离得到,化合物5~7、9为首次从贯叶连翘中分离得到。化合物3和4表现出较好的α-葡萄糖苷酶抑制活性,其IC_(50)值分别为490.3和549.9μmol/L,与阳性药阿卡波糖效果(IC_(50)=500.1μmol/L)相当。

贯叶金丝桃中一个新的间苯三酚及细胞毒活性研究

目的:研究贯叶金丝桃Hypericum perforatum L.的化学成分及其抗肿瘤活性。方法:采用硅胶柱色谱、Sephadex LH-20葡聚糖凝胶、MCI和半制备HPLC等方法对贯叶金丝桃石油醚部位进行化学成分分离,通过NMR、HR-ESI-MS等波谱技术对分离得到的化合物进行结构鉴定;通过MTT法测试分离得到的化合物对肝癌细胞HepG_(2)和肺癌细胞A549的细胞毒活性。结果:从贯叶金丝桃石油醚部位中分离并鉴定了8个化合物,分别为:贯叶连翘素A(1)、1-[2-[[(2E)-3,7-dimethyl-2,6-octadien-1-yl]oxy]-4,6-dihydroxyphenyl]-2-methyl-1-propanone(2)、olympicin A(3)、1-[3-(3,7-dimethyl-2,6-octadien-1-yl)-2,4,6-trihydroxyphenyl]-3-methyl-1-butanone(4)、3-geranyl-1-(2′-methylbutyryl)-phloroglucinol(5)、elegaphenone(6)、2,6-dihydroxy-3,4-dimethylbenzoic acid methyl ester(7)、2,3-methylenedioxyxanthone(8)。结论:化合物1为新的间苯三酚类化合物,以上化合物均为首次从贯叶金丝桃中分离得到。化合物1~6具有一定程度的细胞毒活性。

光、赤霉素和乙烯利对贯叶连翘种子萌发的影响

目的 研究光、赤霉素和乙烯利对贯叶连翘 Hypericum perforatum种子萌发的影响 ,为贯叶连翘的人工栽培提供理论依据。方法 直接发芽法。结果 贯叶连翘种子光下萌发率达 79%,而暗中不萌发。赤霉素和乙烯利不仅能促进种子光下萌发 ,而且能诱导种子暗萌发。但乙烯利处理对幼苗胚根生长有明显的抑制作用。结论 贯叶连翘种子为需光种子 ,其需光性与赤霉素和乙烯利有关。

贯叶连翘挥发油成分的分析

报道了当前全球研究开发的热点抗抑郁植物药贯叶连翘原药材和商品浸膏粉中挥发油成分的分析。贯叶连翘原药材粗粉中挥发油得率 0 .4 % (mL 10 0g) ,从中鉴定了 4 1种化合物 ;从浸膏粉的挥发油中鉴定了 14种化合物。结果表明 :因原料产地、药用部位的不同 。

乙醇法提取金丝桃素的研究

介绍了利用乙醇对贯叶连翘中金丝桃素进行提取的工艺研究。探讨了提取金丝桃素时提取剂用量、提取温度、提取时间和提取剂浓度对贯叶连翘提取物的得率和其中金丝桃素含量的影响。优选出最佳工艺条件，为工业化生产提供了理论依据。

贯叶连翘中金丝桃素提取工艺的研究

贯叶连翘为藤黄科金丝桃属（ＨｙｐｅｒｉｃｕｍＬ．）植物贯叶连翘（ＨｙｐｅｒｉｃｕｍｐｅｒｆｏｒｍａｔｕｍＬ．）的全草，它主要被用于抗菌消炎、收敛止血、治吐血、外伤出血、肿毒及止痛等症［１］。近年来国外的研究发现，金丝桃素是贯叶连翘中的最主要有效成分。...

贯叶金丝桃提取物中总黄酮的测定方法

以中药材 贯叶金丝桃的提取物为对象 ,对其主要有效成分黄酮类化合物总含量测定的几种分光光度法进行了比较研究。发现文献中某些常用的分光光度法存在严重的缺陷。通过与高效液相色谱法测定结果比较 。

RP-HPLC法测定贯叶连翘片剂中有效成分金丝桃素和金丝桃苷的含量

目的 :采用RP -HPLC法测定贯叶连翘片剂中有效成分金丝桃素 (hypericin)和金丝桃苷 (hyperoside)的含量。方法 :分别使用ODS和ODS - 2色谱柱 ,流动相分别是 1 5 6%磷酸二氢钠 (用磷酸调 pH至 2 1) -甲醇 -醋酸乙酯 ( 1∶4∶1)及甲醇 - 0 5 %磷酸 ( 4 5∶5 5 ,用三乙胺调 pH至 3 0 ) ,检测波长分别为 5 90nm ,3 60nm。结果 :加样回收率分别为 98 3 2 % (n =5 ) ,96 0 4 % (n =5 )。金丝桃素的进样量为 0 0 0 98～ 0 16μg、金丝桃苷的进样量为 0 4 3～ 3 4 2 μg时 ,线性关系良好。结论

贯叶连翘的化学成分研究

目的 研究贯叶连翘 Hypericum perforatum L.的化学成分。方法 采用反复硅胶柱层析分离纯化 ,通过理化性质和光谱分析鉴定其化学结构。结果 从贯叶连翘中分离得到 6个化合物 ,分别鉴定为β-谷甾醇 ( )、胡萝卜苷 ( )、金丝桃苷 ( )、6″- O-乙酰金丝桃苷 ( )、3-表乌苏酸 ( )、m yriaboric acid( )。结论 其中化合物 , 和

贯叶连翘中金丝桃素醇法提取工艺的改进

对现行醇法提取植物贯叶连翘中金丝桃素的生产工艺进行了研究和改进。研制出了价廉、无毒、新型的 W.X.除杂剂 ,使生产工序大为简化。一般经提取、除杂、调 p H沉降三步 ,即可得到合格产品。经 HPL C测定 ,产品中金丝桃素含量达到 0 .7% ,远远大于国际市场要求的 0 .3%。同时 ,消除了原料中金丝桃素含量高低对产品质量的影响。

贯叶连翘活性成分研究新进展

介绍了贯叶连翘的活性成分 ,抗抑郁、抗肿瘤、抗病毒等药理作用和副作用的研究新进展。

贯叶连翘醇提条件的多指标优化

本研究采用超声波提取法 ,对贯叶连翘中总黄酮、金丝桃素类和贯叶金丝桃素等主要有效成分在醇提过程中的提取条件 (溶媒种类、浓度、提取时间等 )进行了考察。结果表明 ,以总黄酮和金丝桃素类化合物为指标 ,用 6 5 %～ 80 %的乙醇水溶液超声提取 30min ,提取效率较高 ;以贯叶金丝桃素为指标 ,则以用 75 %～90 %的甲醇提取 30min效果较好。