驱虫斑鸠菊抗肿瘤化学成分的初步研究

目的：分离筛选驱虫斑鸠菊中具有抗肿瘤活性的化学成分。方法：利用生物活性追踪的方式,采用溶剂法、高速逆流色谱技术及柱色谱法对驱虫斑鸠菊成熟果实进行抗肿瘤化学成分的分离筛选。结果：分离并确定了4个化合物的结构,分别为紫铆素、紫铆查尔酮、5,6,7,4’-四羟基黄酮、圣草酚,其中化合物圣草酚为从该植物中首次分离获得;同时经M1Tr法测定,紫铆素和紫铆查尔酮对黑色素瘤细胞株（B16、A375）均有抑制作用,且IC50值小于10uLg·mL^-1。结论：本文结果为进一步探讨驱虫斑鸠菊药材在抗肿瘤方面的作用提供了依据。     

驱虫斑鸠菊中咖啡酰基奎宁酸类化学成分

目的:采用大孔吸附树脂、Sephadex LH-20以及制备HPLC等色谱方法对驱虫斑鸠菊Vernonia anthelmintica成熟种子进行分离纯化,分离得到6个化合物。通过1H,13C-NMR及MS等波谱技术鉴定化合物的结构,分别为咖啡酸(1),3-O-咖啡酰基奎宁酸(2),4-O-咖啡酰基奎宁酸(3),5-O-咖啡酰基奎宁酸(4),表-3,4-O-双咖啡酰基奎宁酸(5),3,4-O-双咖啡酰基奎宁酸(6)。其中,化合物1～6均为首次从该植物中分离得到,其中3～5为首次从该属植物中分离得到。     

斑鸠菊果实中总黄酮的提取工艺研究＊

目的：优选斑鸠菊果实中总黄酮的最佳提取工艺。方法：采用分光光度法,通过单因素实验考察乙醇浓度、提取次数、提取时间以及液料比对斑鸠菊果实中总黄酮提取率的影响。结果：最佳提取条件为乙醇浓度70%、提取4次,每次1 h、料液比为1：20。结论：采用最佳提取条件,得到的斑鸠菊果实中总黄酮含量为103.55 mg·g-1。     

斑鸠菊属的倍半萜内酯类及甾体皂苷类化学成分及药理活性研究进展

介绍菊科斑鸠菊属Vernonia倍半萜内酯类及甾体皂苷类化学成分及其药理活性研究进展。对近年来有代表性的文献进行分析归纳。为促进对本属植物的综合开发和利用,有必要深入研究该属植物的化学成分,建立完善的质量标准。     

HPLC法测定驱虫斑鸠菊中紫铆素的含量

目的:建立以高效液相色谱法测定驱虫斑鸠菊中紫铆素含量的方法。方法:色谱柱为HypersilODS(250mm×4.6mm,5μm),流动相为甲醇-0.5%磷酸溶液(40∶60),检测波长为280nm。结果:紫铆素进样量在0.01～0.5mg范围内与峰面积积分值呈良好线性关系(r=0.9999);平均回收率为93.6%,RSD=2.89%(n=9)。结论:本法简单、准确,可用于驱虫斑鸠菊的质量控制。     

Modulation of cytotoxic T lymphocyte,natural killer cell,antibody-dependent cellular cytotoxicity,and antibody-dependent complement-mediated cytotoxicity by Vernonia cinerea L. and vernolide-A in BALB/c mice via enhanced production of cytokines IL-2 and IFN-γ

Effect of Vernonia cinerea L. and vernolide-A on cell-mediated immune (CMI) response was studied in normal as well as tumor-bearing BALB/c mice. Administration of V. cinerea and vernolide-A significantly enhanced natural killer (NK) cell activity in both normal as well as tumor-bearing animals, and the activity was observed earlier than in tumor-bearing control animals. Antibody-dependent cellular cytotoxicity (ADCC) and antibody-dependent complement-mediated cytotoxicity (ACC) were also enhanced significantly in both normal as well as tumor-bearing animals after V. cinerea and vernolide-A administration compared with untreated control tumor-bearing animals. Extract and vernolide-A showed a significant increase in cytotoxic T lymphocyte (CTL) production in both the in vivo and in vitro models. The level of cytokines such as interleukin (IL)-2 and interferon (IFN)-γ were also enhanced by the treatment of V. cinerea and vernolide-A in both normal as well as tumor-bearing animals. This study demonstrated that V. cinerea extract and vernolide-A stimulate the CTL, NK cell, ADCC, and ADCC through enhanced secretion of IL-2 and IFN-γ.     

Four Novel Mycoviruses from the Hypovirulent Botrytis cinerea SZ-2-3y Isolate from Paris polyphylla: Molecular Characterisation and Mitoviral Sequence Transboundary Entry into Plants

A hypovirulent SZ-2-3y strain isolated from diseased Paris polyphylla was identified as Botrytis cinerea. Interestingly, SZ-2-3y was coinfected with a mitovirus, two botouliviruses, and a 3074 nt fusarivirus, designated Botrytis cinerea fusarivirus 8 (BcFV8); it shares an 87.2% sequence identity with the previously identified Botrytis cinerea fusarivirus 6 (BcFV6). The full-length 2945 nt genome sequence of the mitovirus, termed Botrytis cinerea mitovirus 10 (BcMV10), shares a 54% sequence identity with Fusarium boothii mitovirus 1 (FbMV1), and clusters with fungus mitoviruses, plant mitoviruses and plant mitochondria; hence BcMV10 is a new Mitoviridae member. The full-length 2759 nt and 2812 nt genome sequences of the other two botouliviruses, named Botrytis cinerea botoulivirus 18 and 19 (BcBoV18 and 19), share a 40% amino acid sequence identity with RNA-dependent RNA polymerase protein (RdRp), and these are new members of the Botoulivirus genus of Botourmiaviridae. Horizontal transmission analysis showed that BcBoV18, BcBoV19 and BcFV8 are not related to hypovirulence, suggesting that BcMV10 may induce hypovirulence. Intriguingly, a partial BcMV10 sequence was detected in cucumber plants inoculated with SZ-2-3y mycelium or pXT1/BcMV10 agrobacterium. In conclusion, we identified a hypovirulent SZ-2-3y fungal strain from P. polyphylla, coinfected with four novel mycoviruses that could serve as potential biocontrol agents. Our findings provide evidence of cross-kingdom mycoviral sequence transmission.     

夜香牛全草的生物活性成分研究

目的：研究广西产夜香牛生物活性化学成分。方法：用鼠性肾上腺髓质嗜铬细胞瘤PC-12细胞活性跟踪筛选，柱色谱方法分离化合物，谱学方法鉴定化合物结构。结果：分离得到4个化合物，根据谱学数据分析鉴定其结构分别为木脂素类化合物(+)-lirioresinol树脂醇B(1)，甾醇类化合物豆甾醇(2)和豆甾醇3-O-β-D-葡萄糖苷(3)，以及4-sulfo-benzocyclobutene(4)；用神经细胞体外模型试验，检测了分离得到化合物的NGF诱导活性。结论：化合物1，3,4为首次从该属植物中分离得到，化合物4为新的天然产物。