艾纳香中1个新倍半萜内酯及其细胞毒活性研究

目的研究黔产艾纳香Blumea balsamifera叶中的化学成分并对其进行细胞毒活性评价。方法使用硅胶柱色谱、薄层色谱、Sephadex LH-20凝胶柱色谱等方法分离纯化艾纳香中化学成分,以宫颈癌(HeLa)细胞株、乳腺腺癌(MCF-7)细胞株、肺腺癌(A549)细胞株、胃癌(MGC-803)细胞株、结肠癌(COLO-205)细胞株为供试细胞株,并采用MTT法对分离纯化的化合物进行细胞毒活性筛选。结果从艾纳香中分离得到2个倍半萜内酯,通过波谱数据分析鉴定为艾纳香烯N(1)和艾纳香烯F(2)。细胞毒活性筛选结果表明化合物1对供试的5种细胞株均具有明显的抑制活性,其半数抑制浓度(IC50)值为48.730～97.907μmol/L;化合物2对乳腺腺癌MCF-7细胞株也具有一定的抑制活性,IC50值为91.188μmol/L。结论化合物1为新的倍半萜内酯类化合物;活性筛选结果表明2个倍半萜内酯类化合物都具有一定的细胞毒活性。     

欧亚旋复花中具细胞毒的倍半萜内酯

在东亚,菊科植物欧亚族复花ＩｎｕｌａｂｒｉｔａｎｎｉｃａＬ．作为传统药物用于治疗消化道疾病和支气管炎。欧亚族复花的氯仿抽提物在ＨＬ－６０（人类白血病）细胞中显示出很高的细胞毒性（ＥＤ_(５０)１．９μｍ／ｍＬ）。作者从这一部分抽提物中分离出４个倍半萜内酯;４α,６ａ-二羟桉烷－８β,１２-交酯［４ａ,６ａ－ｄｉｈｙｄｒｏｘｙｅｕｄｅｓ－ｍａｎ－８β,１２－ｏｌｉｄｅ（Ｉ）］,ｅｒｇｏｌｉｄｅ（Ⅱ）,８-表-堆心菊内酯［８－ｅｐｉ－ｈｅｌｅｎａｌｉｎ（Ⅲ）］,和ｂｉｇｅｌｏｖｉｎ（Ⅳ）。其中化合物Ⅰ是首…     

紫锥菊中具细胞毒活性的聚乙炔及多烯类成分的分离和结构鉴定

〔英〕/Pellati F…∥Phytochemistry.-2006,67(13).-1359～1364以生物检测为导向,从紫锥菊Echinacea pallida(Nutt.)Nutt.根中分离出2个聚乙炔化合物(1,3)和3个多烯成分(2,4,5),其中化合物3和4为新的天然产物,鉴定了新化合物的结构,并用人胰腺癌细胞系MIAPaCa-2检测了它们的细     

墓头回木脂素类化学成分及细胞毒活性研究

目的：提取分离墓头回木质素类化学成分,研究墓头回木脂素类成分的细胞毒活性。方法：采用硅胶柱层析、制备薄层层析、高效液相柱层析等方法分离、纯化化合物,利用NMR、MS等现代波谱技术解析化合物化学结构;MTT法研究化合物体外细胞毒活性。结果：从墓头回中分离得到3个木脂素类成分,鉴定其为：nortrachelogenin（Ⅰ）、（＋）-pinoresinol（Ⅱ）、（＋）-lariciresinol（Ⅲ）;3个化合物体外对PC-3、SGC、NB-4等肿瘤细胞具有一定的抑制作用。结论：墓头回中存在木脂素类成分,该类成分对PC-3、SGC、NB-4等肿瘤细胞具有抑制作用。     

RP-HPLC同时测定湖北旋覆花中3种倍半萜内酯的含量

目的:建立RP-HPLC同时测定湖北旋覆花中锦菊素,二氢锦菊素,银胶菊素3种倍半萜内酯含量的方法.方法:Agilent C18色谱柱(4.6 mm×250 mm,5μm),流动相为乙腈—水,线性梯度洗脱,测定波长210 nm,柱温40℃,流速1.2 mL·min-1,进样量10 μL.结果:锦菊素,二氢锦菊素,银胶菊素的质量浓度分别在0.017 92～0.1792 g· L-1(r =0.999 9),0.042 4～0.424 0 g·L-1(r=0.999 6),0.044 8 ～0.448 0 g·L-1(r =0.999 6)时线性关系良好,平均加样回收率依次为98.5％,98.2％,98.4％,RSD为1.3％,1.3％,1.7％.不同品种旋覆花药材中3种倍半萜内酯的含量差异较大.结论:该方法简便、快速、准确,适合于同时测定湖北旋覆花中锦菊素,二氢锦菊素,银胶菊素的含量,可用于湖北旋覆花的质量控制和旋覆花药材的真伪鉴定.     

印楝种子中柠檬苦素类化合物及其细胞毒活性研究北大核心CSCD

采用硅胶、Sephadex LH-20、高效液相等色谱技术,对印楝干燥种子95%乙醇提取物的乙酸乙酯萃取部位进行了系统分离,得到8个柠檬苦素类化合物。通过与文献报道的波谱数据对比,这些化合物被鉴定为salannin（1）,1-detigloyl-1-isobutylsalannin（2）,salannol-3-acetate（3）,salannol（4）,spirosendan（5）,1-detigloyloxy-3-deacetylsalannin-1-en-3-one（6）,nimbin（7）,6-deacetylnimbin（8）。化合物2和5为属内首次分离,并且化合物5为目前发现的唯一1个C环开裂、并与D环形成螺环结构的柠檬苦素。化合物6为新天然产物。在体外细胞毒活性筛选中,化合物6对人宫颈癌细胞（HeLa）和人白血病细胞（HL-60）具有一定生长抑制作用,IC（50）分别为（21.61±4.37）和（27.33±5.74）μmol·L^-1;7和8均对HeLa细胞表现出较弱生长抑制作用,IC（50）分别为（33.15±5.24）和（38.56±6.41）μmol·L^-1。     

当归中1个新香豆素类化合物及其细胞毒活性

目的研究当归Angelica sinensis干燥根的化学成分。方法运用硅胶、凝胶、MCI-Gel树脂及RP-HPLC等多种色谱技术分离纯化,并根据理化性质和波谱数据鉴定化合物的结构。结果从当归干燥根95%乙醇提取物中分离得到了1个新香豆素类化合物,鉴定为6-羟基-3-(4-羟基苯)-7-甲基-香豆素(1);化合物1对A549和MCF-7细胞株IC50值分别为3.2和2.8μmol/L。结论化合物1为1个新的香豆素类化合物,命名为云归香豆素A;其对A549和MCF-7细胞株表现了明显的体外细胞毒活性。     

荷梗中的细胞毒活性生物碱

研究植物莲Nelumbo nucifera Gaertn干燥茎的生物碱类成分及其细胞毒活性,为进一步开发利用荷梗提供依据。采用离子交换树脂、硅胶和Sephadex LH-20柱色谱等方法分离纯化,并运用波谱方法对所分离的化合物进行结构鉴定。采用MTT法对所分离得到的化合物进行HL-60癌细胞毒活性实验。从荷梗总生物碱提取物中分离鉴定了15个生物碱类化合物,分别为阿西米洛宾（1）、异乌药碱（2）、N-乙酰基去甲杏黄罂粟碱（3）、厚壳桂素（4）、velucryptine（5）、pycnarrhine（6）、鹅掌楸碱（7）、荷叶碱（8）、降荷叶碱（9）、杏黄罂粟碱（10）、N-甲基阿西米洛宾（11）、乌药碱（12）、N-去甲杏黄罂粟碱（13）、N-甲基乌药碱（14）、观音莲明（15）。化合物 1~7,12~15 为首次从荷梗中分离得到。化合物 2~6 为首次从莲科植物中分离得到。在样品溶液浓度为1×10^-5 mol·L^-1的条件下,化合物 7~10,13,14 对HL-60癌细胞体外生长的抑制率分别是51.36%,59.09%,52.51%,53.93%,51.43%和64.31%,表明上述化合物对人早幼粒细胞白血病HL-60细胞具有较明显的体外细胞毒活性。     

八角枫根中1个新的生物碱及其细胞毒活性研究

对八角枫Alangium chinense根的化学成分进行研究,运用硅胶、凝胶、MCI-gel树脂及RP-HPLC等多种色谱技术分离纯化,并根据理化性质和波谱数据鉴定化合物的结构,同时用MTT法测定化合物的细胞毒活性。从八角枫根的90%乙醇提取物中分离鉴定了3个生物碱类化合物(1~3),其中化合物1为新化合物,命名为8-羟基-3-羟甲基-6,9-二甲基-7H-苯并[de]异喹啉-7-酮,其对NB4,A-549,SHSY5Y,PC-3,MCF-7的IC50分别为4.2,3.5,5.7,2.8,3.9μmol·L-1,该化合物具一定的细胞毒活性。     

藏木香中1个新桉烷型倍半萜内酯

目的 以活性追踪为导向对藏木香Inula racemosa根部活性倍半萜成分进行靶向分离,并考察其对尼日利亚菌素(nigericin)诱导人单核细胞白血病THP-1细胞中释放白细胞介素-1β(interleukin-1β,IL-1β)的抑制活性.方法 借助各种色谱手段对其活性成分进行分离纯化,采用现代波谱技术(包括高分...     

Cytotoxic sesquiterpene lactones from Eupatorium lindleyanum

Ten new guaiane type sesquiterpene lactones, namely, eupalinilides A-J (1-10), as well as nine known compounds, eupachinilide C (11), eupachifolin D (12), eupachinilide E (13), 2alpha-hydroxyeupatolide (14), 3-deacetyleupalinin A (15), heliangine (16), 8beta-tigloyloxy-2,3-seco-6betaH,7alphaH-helianga-4Z,11(13)-diene-3,10beta;6, 12-diolid-2-oic acid (17), 8beta-(4'-hydroxytigloyloxy)-3beta,14-dihydroxy-6betaH,7alphaH-germacra-1(10)Z,4Z,11(13)-trien-6,12-olide (18), and 8beta-tigloyloxy-3beta,14-dihydroxy-6betaH,7alphaH-germacra-1(10)Z,4E,11(13)-trien-6,12-olide (19), were isolated from the whole plant of Eupatorium lindleyanum. Eupalinilides B (2), C (3), E (5), F (6), and I (9) have been tested for cytotoxicity against P-388 and A-549 tumor cell lines. The results showed that eupalinilides B (2) and E (5) demonstrated potent cytotoxicity. The structures of these compounds were determined by spectroscopic methods including 1D and 2D NMR spectra.     

南川斑鸠菊中的抗肿瘤倍半萜内酯（英文）

目的：研究南川斑鸠菊中的抗肿瘤活性成分方法：采用层析柱和制备高效液相进行化合物分离,运用1H和13CNMR及MS等波谱分析技术鉴定化合物结构;采用MTT法进行7个化合物对人骨髓白血病细胞（HL-60）的体外细胞毒实验。结果：分离得到6个倍半萜内酯[8α-（4-hydroxymethacryloyloxy）-10α-hydroxy-13-methoxyhirsutinolide（1）,8α-methacry-loyloxy-10α-hydroxy-13-O-methylhirsutinolide（2）,piptocarphin A（3）,8α-[4-hydroxymethacryloyloxy]-10α-hydroxyhisutinolide-13-O-acetate（4）,piptocarphin F（5）以及8α-acetoxy-10α-hydroxy-13-O-methylhirsutinolide（6）]和1个inone苷saussureosides B（7）;6个倍半萜内酯（1-6）具有抑制人骨髓白血病细胞（HL-60）的活性（IC503.87-12.5μmol·L-1）,但inone苷saussureosides B（7）对HL-60没有抑制活性。结论：化合物1,2,6和7首次从该植物中得到;南川斑鸠菊中的倍半萜内酯类化合物具有抗肿瘤活性。     

Cytotoxic sesquiterpene lactones from Pseudoelephantopus spicatus

Five new sesquiterpene lactones, spicatolides D-H (1-5), along with four known compounds, pitocarphin D (6), 8 alpha-acetoxy-10 alpha-hydroxy-13-O-methylhirsutinolide (7), spicatolide A (8), and 13-O-methylvernojalcanolide 8-O-acetate (9), were isolated from an ethyl acetate extract of the aerial parts of Pseudoelephantopus spicatus. The structures of the new compounds were elucidated on the basis of spectroscopic data interpretation. All of the compounds isolated were evaluated for their cytotoxic effects against five human cancer cell lines. Compounds 1, 3, and 4 showed cytotoxicity (IC50 < 5 micro g/mL) against the Hep3B and MCF-7 cancer cell lines.     

Cytotoxic sesquiterpene lactones from Centaurothamnus maximus and Vicoa pentanema

The aerial parts of Centaurothamnus maximus yielded three cytotoxic guaianolides, chlorojanerin (1), cynaropicrin (2) and janerin (3). The structure elucidation of 1-3 was based on (1)H and (13)C NMR data, mainly 2D-NMR (1)H-(1)H COSY and (1)H-(13)C HETCOR experiments. Compounds 1-3 showed in vitro cytotoxic activity against human cancer cell lines of malignant melanoma (SK-MEL), epidermoid (KB), ductal (BT-549) and ovarian (SK-OV-3) carcinomas with IC(50) values of 2-6 microgram/mL. In addition, 12 sesquiterpene lactones (4-15), isolated previously from the aerial parts of Vicoa pentanema, were evaluated for cytotoxic and antimicrobial activities. 2alpha- Acetoxy-3beta-hydroxyalantolactone (10) and 8beta-hydroxyparthenolide (14) were found to be the main cytotoxic agents (IC(50) values of 2-6 microgram/mL against SK-MEL, BT-549 and SK-OV-3), while lactones 4, 5, 11 and 15 selectively inhibited the growth of human malignant melanoma (IC(50) value of 3.6-7.3 microgram/mL). Cell aggregation and cell adhesion assays, using HL-60 and HeLa cell lines, evaluated the effect of cytotoxic constituents 1-3, 10 and 14 on immune response and inflammation.     

Cytotoxic sesquiterpene lactones from the root of Saussurea lappa

Bioassay-directed fractionation of Saussurea lappa led to the isolation of a novel lappadilactone (1) and seven sesquiterpene lactones (2-8) as cytotoxic principles against selected human cancer cell lines. Lappadilactone (1), dehydrocostuslactone (2), and costunolide (5) exhibited the most potent cytotoxicity with CD50 values in the range 1.6-3.5 microg/mL in dose- and time-dependent manners. The cytotoxicities were not specific and showed similar activities against HepG2, OVCAR-3 and HeLa cell lines. The structure-activity relationship showed that the alpha-methylene-gamma-lactone moiety is necessary for cytotoxicity, and activity is reduced with the presence of a hydroxyl group. In addition, seven noncytotoxic compounds (9-15) were also isolated, including two novel sesquiterpenes, a guaianolide-type with a C17 skeleton, lappalone (13), and 1beta,6alpha-dihydroxycostic acid ethyl ester (14). The structures of the new compounds were elucidated from spectroscopic and/or X-ray data interpretations. Some representative compounds were also tested for antibacterial activity; however, only marginal activities were observed. Therefore, compounds 1-8 are potential cytotoxic agents but without significant antibacterial effect.     

Cytotoxic sesquiterpene lactones from Vernonia pachyclada from the Madagascar rainforest

Bioassay-guided fractionation of the cytotoxic leaf extract of Vernonia pachyclada Baker led to the isolation of three new sesquiterpene lactones, designated glaucolides K-M (1-3). The structures of the new compounds were determined using 1D and 2D NMR spectroscopy, and the structure and stereochemistry of 1 were confirmed by single-crystal X-ray diffraction. Compound 3 showed moderate activity in the A2780 human ovarian cancer cell line, with an IC50 of 3.3 microM.     

Cytotoxic sesquiterpene lactones from Eupatorium kiirunense, a coastal plant of Taiwan

Phytochemical investigation of Eupatorium kiirunense has resulted in the isolation of eight new sesquiterpene lactones, constituted by five germacranolides, eupakirunsins A-E (1-5), and three heliangolides, eupaheliangolide A (6), 15-acetoxyheliangin (7), and 3-epi-heliangin (8), in addition to the known heliangin (9) and 8,10-epoxy-9-acetoxythymol angelate (10). The structures of the new compounds were established through detailed analysis of their spectroscopic data. Compounds 6, 8, and 9 exhibited cytotoxicity against human oral epidermoid (KB), cervical epitheloid (Hela), and liver (hepa59T/VGH) carcinoma cells.     

苍耳属中倍半萜内酯的研究进展

介绍了近年来苍耳属植物中倍半萜内酯化合物的研究概况,包括准确的结构式、植物来源及波谱数据。由于其具有多种活性,尤其是抗肿瘤、抗癌活性,故倍受重视。     

In vitro cytotoxicity of sesquiterpene lactones from Eupatorium cannabinum L. and semi-synthetic derivatives from eupatoriopicrin

In this study 13 semi-synthetic derivatives were prepared from the sesquiterpene lactone eupatoriopicrin, with the aim of obtaining compounds that are more active than eupatoriopicrin, and to give more insight into structure–activity relationships. The compounds were screened for cytotoxicity in vitro against the tumour cell lines EAT, P388, FIO 26, L5178Y(s) (murine) and HeLa (human). Cytotoxicity was compared with the germacranolides eupatoriopicrin, 5′-dehydroxy eupatoriopicrin (‘compound 1’), hiyodorilactone E, eupatolide and eucannabinolide from Eupatorium cannabinum L. and with the eudesmanolides alantolactone and isoalantolactone from Inula helenium L. Acetalization of both hydroxyl groups in the ester side chain of eupatoriopicrin with acetone enhanced cytotoxicity 2–7-fold. Introduction of bulky groups, such as alkyl groups with a longer carbon chain and (halogenated) acetophenone derivatives, via acetalization, reversed the enhancement. Oxidation at the germacrane ring structure of eupatoriopicrin acetonide, yielding an alcohol or an epoxy derivative, affected cytotoxicity adversely.     

Cytotoxic sesquiterpene lactones from the leaves of Vernonia guineensis Benth. (Asteraceae)

Ethnopharmacological relevance

Vernonia guineensis Benth. (Asteraceae) preparations are used in folk medicine in Cameroon to treat a number of ailments, including prostate cancer and malaria, and is used as an anthelmintic, adaptogen and antidote. The aim of this study was to continue the validation of the activity of Vernonia guineensis Benth. extracts and isolated molecules against cancer cell lines following the previous isolation of an anti-prostate cancer sugar ester from the root extract.

Materials and methods

Acetone extracts of Vernonia guineensis Benth. leaves were tested for activity against 10 cancer cell lines (Breast—MDA-MB-231, Breast—MCF-7, Colon—HCT-116, Leukemia—HL-60, Lung—A549, Melanoma—A375, Ovarian—OVCAR3, Pancreas—Mia-paca, Prostate—PC-3 and Prostate—DU-145). The acetone extract was subjected to bioactivity guided fractionation. Anti-proliferation and clonogenic activity of the isolated compounds were tested. The WST-1 assay was used for the anti-proliferation activity, while the standard clonogenic test was used to determine the clonogenic activity.

Results

The acetone extract of Vernonia guineensis Benth. demonstrated in vitro activity ranging from IC₅₀ 4–26 μg/mL against the 10 cell lines. Activity guided fractionation of this extract yielded two sesquiterpene lactones, isolated for the first time from the genus Vernonia. The compounds were characterized using spectroscopic experiments, including a combination of 1D and 2D NMR data. Vernopicrin (1) and Vernomelitensin (2) demonstrated in vitro activity against human cancer cell lines with IC₅₀ ranging from 0.35–2.04 μM (P<0.05) and 0.13–1.5 μM (P<0.05), respectively, between the most and least sensitive cell lines for each compound. Vernopicrin was most active against the human melanoma (A375) cell line and least active against the lung cancer (A549) cell line, while Vernomelitensin was also most active against the human melanoma (A375) cell line and least active against the breast cancer (MCF-7) cell line. Both compounds also demonstrated anticlonogenic activity.

Conclusion

The cytotoxicity demonstrated by the crude extract and isolated sesquiterpenes against cancer cell lines highlights the medicinal potential of V. guineensis. The selective anti-proliferation and dose dependent anticlonogenic activities suggest that the identified sesquiterpenes could be potential antitumor agents.