鸦胆子抗肿瘤活性成分化学研究(II)

从苦木科植物鸦胆子（Ｂｒｕｃｅａｊａｖａｎｉｃａ（Ｌ．）Ｍｅｒｒ．）果实的抗肿瘤活性部位中经硅胶柱等分离得到４个四环三萜苦木内酯化合物，经波谱鉴定分别为鸦胆因Ｄ，鸦胆因Ｈ，鸦胆子甙Ａ和双氢鸦胆子甙Ａ．其中鸦胆子甙Ａ为主要活性成分之一．     

鸦胆子抗肿瘤的研究 10.鸦胆子甙A、甙B及鸦胆因E和F的分离与结构鉴定

<正> 继前报,从苦木科植物鸦胆子[Brucea javanica(L.)Merr]的种子中分离出三个单体,即鸦胆子苦醇,鸦胆因 D 和鸦胆因 B 后,又进一步从该种子的有效的丁醇提取物中分离得到四个苦木内酯类单体,经鉴定证明分别为鸦胆子甙 A(Bruceoside A),甙 B(Bruceo-side B),鸦胆因 E(Bruceine E)和 F(Bruceine F),据报导鸦胆子甙 A     

鸦胆子油的提取

鸦胆子为苦木科植物鸦胆子的果实，别名有鸦胆、老鸦胆、苦棒子、苦参子、鸦蛋子、鸭蛋子、解苦庆、小苦探等。含有生物碱（鸦胆子往、鸦胆宁）、糖忒（鸦胆灵、鸦胆子成）、酚性成分（鸦胆子酚）及鸦胆子苦醇、鸦胆子素等苦味成分。鸦胆子仁含脂肪油（鸦胆子抽56·23％）。现将鸦胆子油的提取方法介绍如下．鸦胆子油的提取一般常用压榨法和溶剂提取法两种，而后者所得的鸦胆子抽纯度高，本实验采用泡剂提取法。1．实验的原料、试剂：鸦胆子：市药材站出售、本省闽北产的苦木材植物的果实。石油酸：上海产，化学纯（因购不到工业用的），佛…     

鸦胆子中鸦胆因H 的分离和鉴定

<正> 近几年来,随着抗癌药物的深入研究,鸦胆子的化学成分及药理作用的研究亦有很大进展。到目前为止,已从鸦胆子(Brucea javanica)中提取分离到38个苦木内酯及其甙。鉴于临床药理研究的需要,我们继前几报报道了苦醇(Brusatal)、鸦胆因 B、D、E、F(Bruveine B、D、E、F),鸦胆子甙 A、甙 B 和甙 E 的提取分离和结构鉴定后,又从中分     

鸦胆子抗肿瘤活性成分的化学研究（Ⅰ）

鸦胆子抗肿瘤活性成分的化学研究（Ⅰ）杨正奇，王金锐深圳三九医药研究院深圳５１８０２９孙铁民，李铣沈阳药科大学药物研究所沈阳１１００１５苦木内酯化合物为一类具有抗肿瘤活性的四环三萜类结构化合物，广泛存在于苦木科植物中。在我国主要存在于鸦胆子属植物──鸦...     

中药鸦胆子总苦木内酯提取物中鸦胆苦醇的含量测定

目的建立RP HPLC法测定中药鸦胆子总苦木内酯提取物中鸦胆苦醇的含量。方法采用RP HPLC法:色谱柱为C18柱(250 mm×4.6 mm,5μm),流动相为甲醇水(体积比为41∶59),检测波长为277 nm,柱温34℃。结果鸦胆苦醇质量浓度在43.6~348.8 mg.L-1内与峰面积呈良好的线性关系,r=0.999 9(n=5),平均回收率为100.7%,RSD为1.6%(n=9)。结论测定方法准确、可靠,为鸦胆子总苦木内酯提取物质量评价提供了可靠的依据。     

鸦胆子抗肿瘤的研究——14.鸦胆子甙 E 及双氢苦醇的分离和结构鉴定

<正> 一、鸦胆子甙 E 的分离及结构鉴定(一)提取分离鸦胆子种子的有效的丁醇提取物30克,经硅胶(1250克)柱层析,用氯价——甲醇——水(50∶12∶3)下层洗脱,每250ml 收集一份,依薄层鉴定合并相似组分,在分离出抗癌有效单体鸦胆子甙 A、甙 B、鸦胆因 E 和 F 后,以上述溶媒系统每100毫升中加入10毫升甲醇作为洗脱溶媒继续洗脱,至第30—32组份回收溶媒后,残渣用甲醇溶解,自然挥尽溶媒后成晶粥状,甲醇处理后得白色针晶鸦甙子甙 E。     

鸦胆亭的全合成

从苦木科植物中分离到的苦木素类物质近年来受到人们的高度重视,因其有多种生理活性。其中从鸦胆子属中得到的鸦胆亭bruccantin)(1)和鸦胆亭醇(bruccantioal)(2)具有显著的抗癌活性。已有许多文献报道了合成鸦胆亭的中间体,但除了我们合成(±)15去氧鸦胆子内酯(bruccolide)(±9),将之转为(-)型,最后合成(-)鸦胆亭(1)的初步报道外,尚未见其它类似的合成路线。本文据众多文献并结合作者等自己的经验,从多方考虑决定采用作者等前曾合成过的化合物(16)为起始原料(参见Bull Chem     

抗癌剂(79):抗痢鸦胆子的细胞毒类抗白血病生物碱

从抗痢鸦胆子(Brucea antidysenterica Mill.)植物已分离出4种抗白血病苦木苦味素类新成分:鸦胆子糖甙A 和B,鸦胆醇A 和B。本文从该植物中分离出两种细胞毒抗白血病生物碱,一种是已报道的11-羟基铁屎米酮(11-Hydroxycanthin-6-one,1),另一种是尚未见报道的新成分1,11-二甲氧基铁屎米酮(1,11-dimethoxycanthin-6-one,3)。新成分3对Dragendorff试验呈阳性,UV 吸收呈典型的铁屎米酮生物碱类型,     

鸦胆子中的细胞毒:鸦胆子苦内酯

许多鸦胆子苦内酯,包括从B.antidy-senteriea分离到的鸦胆丁和鸦胆丁醇,对实验肿瘤系统如体外9-KB系统和体内P-388白血病,具有明显的抑制活性。本文报告对从斐济得到的鸦胆子(B.javanica(L.)Merr,异名:B.amarissima Desv.ex Gomes,B.sumatrana Boxb.)中的鸦胆子苦内酯的研究。用对小鼠TLX-5淋巴细胞的细胞毒试验,指导植物提取物中鸦胆子苦内酯的分离。根和果实中的主要鸦胆子苦内酯,通过PMR和MS鉴定是鸦胆因A,小鼠TLX-5淋巴细胞实验ID_(50)为0.031微克/毫升。还分离到一个新鸦胆子苦内酯,其结构经PMR和MS推断为去     

Correlation of the in vitro cytotoxic and in vivo antitumor activities of gold(I) coordination complexes

A series of gold(I) coordination complexes including analogues of the antiarthritic agent auranofin 1 were evaluated for in vitro cytotoxic potency against both B16 melanoma cells and P388 leukemia cells and in vivo antitumor activity against P388 leukemia in mice. A number of the complexes showed potent cytotoxic activity in vitro and antitumor activity in vivo, with the phosphine-coordinated gold(I) thiosugar complexes demonstrating the greatest in vitro and in vivo activity. The data compiled for 63 complexes of the general structural formula LAuX provide the basis for the following observations: potent in vitro cytotoxic activity is observed for substituted (phosphine) gold complexes, lack of potency in vitro correlates well with lack of antitumor activity, potent cytotoxicity in vitro is not necessarily predictive of activity in vivo, in vivo antitumor activity is generally optimized by ligation of Au(I) with a substituted phosphine and a thiosugar.     

4-(甲基苯胺基)-3-氰基喹啉类衍生物的 合成及抗肿瘤活性

目的 设计合成4-(甲基苯胺基)-3-氰基喹啉类衍生物,并对其体外抗肿瘤活性进行初步评价。 方法 以氰乙酸乙酯为起始原料,经多步反应合成目标化合物。采用MTT法,以吉非替尼（gefitinib）为阳性对照药,以A549、HT-29和MDA-MB-231为测试细胞株对目标化合物的抗肿瘤活性进行了评价。 结果 合成了18个新化合物,经1H-NMR、MS和IR确认其结构。体外活性测试结果显示,多数化合物可在较低浓度抑制肿瘤细胞增殖,其中的Ⅶ2、Ⅶ3、Ⅶ6、Ⅶ12、Ⅶ13、Ⅶ15 和 Ⅶ16共7个化合物有显著的抗增殖活性,优于阳性对照药吉非替尼。 结论 体外活性实验表明：4-(甲基苯胺基)-3-氰基喹啉类衍生物作为新型的酪氨酸激酶抑制剂,其构效关系值得进一步研究。     

Synthesis of water-soluble (aminoalkyl)camptothecin analogues: inhibition of topoisomerase I and antitumor activity.

Water-soluble analogues of the antitumor alkaloid camptothecin (1) were prepared in which aminoalkyl groups were introduced into ring A or B. Most of the analogues were prepared by oxidation of camptothecin to 10-hydroxycamptothecin (2) followed by a Mannich reaction to give N-substituted 9-(aminomethyl)-10-hydroxycamptothecins (4-12) or by subsequent modification of Mannich product 4 (13, 15, 17, 19, 21). Others were obtained by modification of the hydroxyl group of 2 (25,26) or by total synthesis (35,42,43). These analogues, as well as some of their synthetic precursors, were evaluated for inhibition of topoisomerase I, cytotoxicity, and antitumor activity. Although there was not a quantitative correlation between these assays, compounds that inhibited topoisomerase I were also cytotoxic and demonstrated antitumor activity in vivo. Further evaluation of the most active water-soluble analogue led to the selection of 9-[(dimethylamino)methyl]-10-hydroxycamptothecin (4, SK&F 104864) for development as an antitumor agent. In addition to its water solubility, ease of synthesis from natural camptothecin, and high potency, 4 demonstrated broad-spectrum activity in preclinical tumor models and is currently undergoing Phase I clinical trials in cancer patients.     

襄阳市中心医院住院肿瘤患者处方点评与不合理用药分析

目的：了解襄阳市中心医院（以下简称“我院”）住院肿瘤患者抗肿瘤药的使用情况,以促进临床抗肿瘤药的合理使用。方法：随机抽取我院2013年6月—2014年6月肿瘤科住院患者病历1200份,依据相关处方点评规范及药品法定说明书对抗肿瘤药进行处方点评,分析不合理用药情况。结果：1200份病历医嘱中,合理用药医嘱1149份,合格率为95.75％;不合理病历医嘱51例,主要表现为选药与适应证不适宜、药品的用法与用量不适宜、药品溶剂选用不适宜和用药顺序不适宜。结论：我院抗肿瘤药使用存在一定的问题,今后需加强监督管理,以期提高临床合理用药水平,保障患者的用药安全。     

Synthesis and antitumor evaluation of some 1,3,4-oxadiazole-2(3<Emphasis Type="Italic">H</Emphasis>)-thione and 1,2,4-triazole-5(1<Emphasis Type="Italic">H</Emphasis>)-thione derivatives

A series of 1,3,4-oxadiazole-2-thione and 1,2,4-triazole-5-thione derivatives have been successfully synthesized and studied for their antitumor activity. These compounds were prepared from carboxylic acids and chiral aminoacid esters. The prepared compounds were evaluated for their cytotoxicity against cancer in vitro using hydroxyurea (HU) as positive control. A fair number of compounds were found to have significant antitumor activity. To study the molecular basis of interaction and affinity of binding of the target molecules, all the compounds were docked into the ATPase domain of TP-II and tubulin using Schrödinger.     

Synthesis, antitumor activity, and nephrotoxicity of the optical isomers of 2-aminomethylpyrrolidine(1,1-cyclobutane-dicarboxylato)platinum(II).

The optical isomers of 2-aminomethylpyrrolidine(1,1-cyclobutane- dicarboxylato)platinum(II) (DWA2114, 1), which has potent antitumor activity against various tumors, were synthesized. They were examined for antitumor activity against Colon 26 carcinoma in a sc-iv system, and changes in urinary protein and sugar levels in drug-treated mice were used as an index of nephrotoxicity. In their effect on tumors, (+)-(S)-2-aminomethylpyrrolidine(1,1-cyclobutanedicarboxylato++ +)platinum(II) (6b) was more potent than the enantiomer 6a in that the effective dose of 6b was smaller than that of 6a; but, both drugs exhibited potent antitumor activity. On the other hand, a distinct difference between 6a and 6b was shown in their nephrotoxicity. Isomer 6b induced a great increase in urinary protein and sugar levels in mice, whereas 6a caused no increase in these levels.     

抗癌新药石蒜内铵(AT-1840)构效关系研究

自翁尊尧等合成并发现石蒜内铵(lycobetain,AT-1840,Ⅰ)的抗癌活性和不抑制骨髓造血功能的作用机理以来,已对其构效关系进行了一些研究,主要得出以下结论:石蒜内铵Ⅰ分子中的亚甲二氧基和由酚羟基与季铵基组成的内铵盐部分对其抗癌活性是必需的,五元氮杂环部分对石蒜内铵的抗癌活性则没有明显的影响。     

改良培养基制备A群链球菌制剂及其抗肿瘤活性研究

目的用改良培养基研制A群链球菌制剂，并研究其半数致死量（LD50）和抗肿瘤活性。方法用改良牛肉汤培养基培养A群链球菌弱毒株，在此基础上制备A群链球菌制剂，并对其毒性和抗肿瘤活性进行初步研究。结果A群链球菌制剂静脉注射的LDso为170．7mg／kg，腹腔注射的掘。为804．1mg／kg；A群链球菌制剂对动物移植性肿瘤EAC及HepA均有明显的抗肿瘤作用，生命延长率分别达到63．38％和59．12％。结论A群链球菌在改良牛肉汤培养基上生长良好，所得制剂的抗肿瘤活性明显。