Jacaranone glycosides from Senecio scandens

Bioassay-guided fractionation of the ethanol extract of Senecio scandens led to the isolation of four new compounds 1-4. These compounds were obtained as tautomeric mixture of alpha/beta epimers, but their structures were confirmed unambiguously by 1D and 2D NMR spectra and LC NMR technology. 1H NMR spectra of pure 1alpha and 1beta were furnished by HPLC NMR technology. Compounds 1-4 exhibited moderate cytotoxicities against five tumor cell lines.     

HPLC法测定千里光中槲皮素的含量

目的:建立测定千里光药材中槲皮素含量的方法,为千里光的质量控制提供理论依据。方法:采用高效液相色谱法。色谱柱为Agilent Eelipse XDB C18(250mm×4.6mm,5μm),柱温为30℃,流动相为甲醇-0.1%三氟乙酸(65:45),流速为1.0mL·min-1,检测波长为360nm,进样量为20μL。结果:槲皮素进样量在0.2032～1.8288μg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98.42%,RSD=4.16%(n=6)。结论:本方法专属性强、准确度高、重复性好,可用于千里光的质量控制。     

千里光药理作用和毒性研究新进展

目的为开展基于“功效-毒性”相关的千里光功效与毒性物质基础的“量-效关系”和“量-毒关系”研究提供文献依据和研究思路。方法在梳理文献、古籍中对千里光药理毒理的记载基础上,对近十几年来国内外千里光的药理作用和毒性研究进展进行整理、分析与归纳。结果发现千里光药理作用主要为抗菌、抗氧化、抗病毒、抗肿瘤作用等,毒性作用主要有肝毒性、骨骼发育异常、致突变作用等。结论在千里光功效表达过程中,进行毒性特点的研究,才能提出切合千里光临床使用过程中与药品不良反应（ADR）相关预警方案和早期诊疗措施,以确保其临床用药安全。     

千里光的研究进展

综述了国内近年来对千里光化学成分、药理作用、毒理作用、临床研究及分析方法的研究状况。     

千里光与一枝黄花的形态鉴别研究

目的研究千里光与一枝黄花的植物形态差异,以免药材采收、使用时混淆。方法①采集两者标本,对二者的茎、叶、花作植物学比对;②按炮制规范,制成饮片,比较二者差异。结果二者茎、叶、花的植物学特点有差异。结论本实验结果及检索鉴别可用于二者鉴别。     

千里光化学成分和药理作用研究进展

千里光为菊科千里光属植物,又名九里明。其主要含有生物碱类、酚酸类、黄酮类、挥发油类、萜类以及其他成分,其药理作用包括抗菌、抗炎、抗病毒及抗肿瘤、抗氧化及清除自由基和毒理等作用。本文综述了千里光的化学成分及药理活性,为本植物的深入研究提供参考。     

HPLC法同时测定千里光中对羟基苯甲酸和邻羟基苯甲酸的总含量及对羟基苯乙酸的含量

建立同时测定千里光药材中对羟基苯甲酸和邻羟基苯甲酸总含量及对羟基苯乙酸含量的方法。方法：采用HPLC法,色谱柱：Shiseido（Fine Chemicals）Capcell Pak C18柱（250mmx4.6mm,5μm）;流动相：甲醇：水：甲酸（13：87：0．5）;流速：1.0ml·min^-1;检测波长：240nm;柱温为室温。结果：对羟基苯甲酸和邻羟基苯甲酸的总浓度在0．025～0．400mg·ml^-1范围内线性关系良好（r=0．9998）,平均加样回收率为97．59％,RSD=1．22％（n=6）;对羟基苯乙酸的浓度在0．05—0．80mg·ml6-1范围内线性关系良好（r：0．9998）,平均加样回收率为98．07％,RSD=1．90％（n=6）。结论：该方法操作简单。重现性好,适用于千里光中对羟基苯甲酸、邻羟基苯甲酸和对羟基苯乙酸的含量测定。     

比色法测定广西产千里光药材中吡咯里西啶生物碱的含量

目的：建立广西产千里光药材中吡咯里西啶生物碱的含量测定方法。方法采用比色法,以阿多尼弗林碱为对照,检测波长为565 nm,测定广西产千里光药材中吡咯里西啶生物碱的含量。结果在1.02~16.32μg·mL-1的浓度范围内,阿多尼弗林碱对照品浓度与其吸光度呈正比关系（ r＝0.9997）,平均回收率为98.9%,RSD为0.70%（ n＝6）。结论该方法简便、准确、重复性好,可作为控制本品质量标准的一种方法。     

Jacaranone and related compounds from the fresh fruits ofTernstroemia japonica and their antioxidative activity

Jacaranone and related compounds (1-3) were isolated, along with three triterpenes (4-6), from the fresh fruits of Ternstroemia japonica. The compounds were identified as jacaranone (1), 3-hydroxy-2,3-dihydrojacaranone (2), 3-methoxy-2,3-dihydrojacaranone (3), 3-O-acetyloleanolic acid (4), 3-O-acetylursolic acid (5), and ursolic acid (6). Jacaranone and its derivatives were isolated for the first time from Theaceae. Of the isolated compounds, compound 3 is a new compound. Jacaranone (1) exhibited weak antioxidative effect on 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical.     

A new lactone from Senecio cannabifolius less

A new lactone compound named cannabifolactone A was isolated from the water extract of the aerial parts of Senecio cannabifolius Less. Its structure was elucidated mainly by 1D- and 2D-NMR techniques.     

Inhibition of angiotensin converting enzyme activity by five Senecio species

In our continuous search of biological properties of Senecio species (Compositae), we investigated S. ambiguus subsp. ambiguus (Biv.) DC, S. gibbosus subsp. gibbosus DC, S. leucanthemifolius Poiret, S. inaequidens DC, and S. vulgaris L. for their angiotensin converting enzyme (ACE) inhibitory activity through an in vitro bioassay based on the enzymatic cleavage of the chromophore-fluorophore labelled substrate dansyltriglycine into dansylglycine, which is quantitatively measured by HPLC. Among analyzed extracts, ethyl acetate demonstrated the highest activity with IC₅₀ values of 192.1 and 219.1?μg/mL for S. ambiguus subsp. ambiguus and S. inaequidens, respectively. Flavonoids were detected in these extracts on TLC sprayed with Natural Products reagent - polyethylene glycal reagent (NP/PEG).     

Lipoxygenase-inhibiting phenolic glycosides and monoterpene glycosides from Paeonia lactiflora

The EtOH extract of the roots of Paeonia lactiflora afforded a new phenolic glycoside paenoside A (1) and a new monoterpene glycoside paeonin D (2), and five known monoterpene glycosides. Their structures were elucidated on the basis of spectroscopic means and hydrolysis products. All compounds displayed inhibitory potential against enzyme lipoxygenase.     

A new lactone from Senecio cannabifolius Less

A new lactone compound named cannabifolactone A was isolated from the water extract of the aerial parts of Senecio cannabifolius Less. Its structure was elucidated mainly by 1D- and 2D-NMR techniques.     

Synthesis and bioevaluation of diphyllin glycosides as novel anticancer agents

A series of diphyllin glycosides were synthesized from diphyllin by phase transfer catalysis glycosylation, deprotection, and etherification, and the structures were established by (1) H NMR, (13) C NMR, and HRMS. These glycosides were evaluated for their in vitro cytotoxicity against HCT-116, A549, and A549T cancer cell lines by MTT assay, and most of them were cytotoxic at submicromolar concentrations. They were also effective against the paclitaxel-resistant cell line A549T. The kDNA decatenation assay indicated that most of these compounds inhibited topoisomerase IIα-mediated kDNA decatenation. In addition, the in vitro tubulin polymerization study showed that compounds 5 and 6 had antimicrotubule activity with a paclitaxel-like mode of action. Taken together, these results suggest that these diphyllin glycosides act on both TopoII and tubulin.     

Lecanorosides A and B,two new triterpene glycosides from the sea cucumber Actinopyga lecanora

Two new sulphated triterpene glycosides, lecanorosides A (1) and B (2), along with the known compounds holothurins A (3), A₁ (4), and B (5), were isolated from the sea cucumber Actinopyga lecanora. Their structures were deduced from extensive spectral analysis (NMR and MS) and chemical evidence. Glycosides 1 and 4 showed marginal in vitro cytotoxicity against two human tumour cell lines.     

A new prenylated isoflavone from Derris scandens Benth

The phytochemical study of the whole plant of Derris scandens (Leguminosae) has resulted in the isolation of a new isoflavone derivative, scandinone A (11), together with 11 known compounds (1–10, 12). Structural elucidations of these compounds were performed using spectroscopic methods especially 1D, 2D NMR, and mass spectral analyses. The α-glucosidase-inhibitory activity of the isolates was also evaluated.     

Hillasides A and B, two new cytotoxic triterpene glycosides from the sea cucumber Holothuria hilla Lesson

Two new triterpene glycosides, hillasides A (1) and B (2), were isolated from the sea cucumber H. hilla Lesson, together with one known glycoside holothuria B (3). Their structures were deduced by extensive spectral analysis and chemical evidences. The presence of conjugated double bonds [22E,24-diene] in the aglycone of 1 is a rare structural feature among sea cucumber glycosides. The two glycosides showed significant cytotoxicity against eight human tumour cell lines (A-549, MCF-7, IA9, CAKI-1, PC-3, KB, KB-VIN and HCT-8) with IC₅₀ in the range of 0.1-3.8 μg/ml.     

鸡矢藤的研究进展

鸡矢藤中含有环烯醚萜类、三萜类、甾体类、黄酮类、挥发油及其他多种成分,具有抗炎、镇痛、降尿酸和保肾等多种生物活性。本文结合鸡矢藤的主要化学成分综述其药理活性及临床应用。     

大叶橐吾中的黄酮醇苷和单萜苷(英文)

目的 研究大叶橐吾的化学成分。方法应用多种色谱方法和色谱材料进行提取、分离和纯化,用各种现代光谱方法解析结构。结果从大叶橐吾根茎的乙醇提取物中分离纯化到四个黄酮醇苷和两个单萜苷,分别为甲基鼠李素-3-O-β-D-芸香糖苷(1),鼠李素-3-O-β-D-芸香糖苷(2),芦丁(3),阿福豆苷(4),桦木苷(5)和3,7-dimethyloct-1-ell-3,8-dio1-8-O-β-D-glucopyranoside(6)。结论所有化合物均为首次从该种植物中分离纯化得到。     

葎草水提物止痒作用的实验研究

目的：研究葎草水提物的止痒作用。方法：通过采用4-氨基吡啶（4-AP）诱发小鼠皮肤瘙痒反应、氯喹诱发小鼠全身瘙痒反应、组胺致豚鼠局部瘙痒反应及2,4-二硝基氟苯（DNFB）致小鼠右耳廓迟发型变态反应的瘙痒动物模型,并用放射免疫分析方法（RIA）测定氯喹致小鼠瘙痒后血清中IL-4的含量,观察葎草水提物的止痒作用。结果：葎草水提物100、30mg/kg显著抑制4-AP和氯喹诱发小鼠瘙痒反应的持续时间,其中100mg/kg可显著减少搔痒次数,并显著降低氯喹诱发小鼠瘙痒反应后血清中IL-4的含量;葎草水提物25、7.5mg/kg显著提高豚鼠致痒阈;100、30mg/kg显著抑制DNFB致小鼠右耳廓肿胀。结论：葎草水提物具有止痒作用,可能与抑制组胺和IL-4的释放有关。