海绵来源真菌黄灰青霉Sp-19中的抗肿瘤活性成分研究

目的对一株来源于羽毛山海绵Mycale plumose的真菌黄灰青霉Penicillium auratiogriseumSp-19发酵产物中的抗肿瘤活性成分进行分离和鉴定。方法采用溶剂萃取、硅胶柱色谱及制备HPLC等分离手段对该菌株发酵产物的活性部位进行了活性追踪分离,通过理化性质及波谱学手段进行化学结构鉴定,以SRB法评价了化合物的抗肿瘤活性。结果与讨论从发酵产物中分离得到5个生物碱类化合物,其结构分别鉴定为fructigenines A(1),去乙酰化fructigenines A(2),fructigeninesB(3),1,4-benzodiazepine-2,5-diones(4)和cyclopenin(5);化合物4和5在3μg.mL-1时对小鼠乳腺癌tsFT210细胞具有强的细胞毒活性。     

深海来源的微生物抗肿瘤活性筛选及次级代谢产物的初步研究

目的 对来自深海的海水、海泥样品进行了微生物分离并通过抗肿瘤活性筛选获得活性菌株,并研究活性菌株c2b的次级代谢产物.方法 从样品中选择性分离得到真菌,并采用海虾生物致死法和人体慢性艇性白血病细胞(K562)为筛选模型对分离得到真菌的发酵产物进行抗肿瘤活性筛选;采用溶剂萃取、硅胶柱色谱及制备HPLC等分离手段对c2b菌株发酵产物的活性部位进行了活性追踪分离,通过理化性质及渡谱学手段进行化学结构鉴定,以SRB法评价了化合物的抗肿瘤活性.结果与结论 从深海来源的样品中共分离获得29株真菌,其中7株具有细胞毒活性;从c2b活性菌株的发酵产物中分离得到6个单体化合物(1～6),其化学结构分别鉴定为N-乙酰色氨(1),chrysogine(2),过氧化麦角甾醇(3),5,8-epidioxy-24-methylcholesta-6,22-dien-3β-ol(4),cerevisterol(5)和(4E,8E)-N-[(2'R,3'E)-2'-hydroxy-3'-hexadecenoyl]-1-O-β-D-glycopyranosyl-9-methyl-4,8-sphingadiene(6),其中化合物3,4对小鼠乳腺癌细胞(tsFT210)具有中等强度的细胞毒活性.     

深海来源曲霉属真菌CXCTD-06-6a次级代谢产物中的肿瘤细胞增殖抑制活性成分研究

目的 对一株来源于深海的曲霉属真菌CXCTD-06-6a发酵产物中的抗肿瘤活性成分进行分离和鉴定.方法 采用溶剂萃取、柱色谱层析及制备HPLC等方法对菌株发酵产物的活性部位进行了活性追踪分离,通过理化性质及波谱学手段进行化学结构鉴定,以MTT法评价了化合物的抗肿瘤活性.结果 从菌株CXCTD-06-6a的发酵产物中分离...     

曲霉属真菌Aspergillus sclerotiorum XJW-56中抗肿瘤活性次级代谢产物研究

目的对1株分离自南海沉淀物的曲霉属真菌Aspergillus sclerotiorum XJW-56的次级代谢产物进行分离、鉴定及抗肿瘤活性研究。方法采用溶剂萃取、柱色谱层析及制备HPLC等方法对真菌Aspergillus sclerotiorum XJW-56的发酵产物进行化学分离,通过NMR、MS等波谱学技术并参阅文献进行化合物结构鉴定,采用SRB和MTT法评价化合物的抗肿瘤活性。结果从发酵产物中分离得到10个asterriquinone类单体化合物(1~10),其化学结构分别鉴定为petromurin C methyl ether(1)、petromurin D methyl ether...     

海洋真菌分离及菌株Aspergillus versicolor ZLQ-43的次级代谢产物的研究D

目的 对来源于渤海地区样品进行海洋真菌分离,并深入研究目标菌株杂色曲霉Aspergillus versicolor ZLQ-43的抗肿瘤活性成分。方法 采用稀释涂布平板法进行海洋真菌的分离;应用溶剂萃取,TLC分析,柱色谱层析及制备HPLC等方法对菌株ZLQ-43的发酵产物进行研究;通过理化性质及波谱学方法并参阅文献进行化学结构鉴定;采用CPE MTT法评价其抗H1N1流感病毒活性,采用SRB法评价其抗肿瘤的活性。结果 从渤海地区样品中最终筛选分离到海洋真菌90株,从菌株ZLQ-43发酵提取物中分离得到聚酮类化合物6个,经结构鉴定分别为sterigmatocystin (1), dihydrosterigmatocystin (2), vericolorin B (3), paeciloquinone C (4), versiconol (5)和2,4-dihydroxy-6-((R)-4-hydroxy-2-oxopentyl)-3-methylbenzaldehyde (6)。化合物4、6具有中等强度的抗H1N1病毒活性,抑制率分别为67.6%和51.5%;化合物5在1 mg?mL-1浓度下对P388细胞增殖抑制率67.79%。 结论 菌株ZLQ-43能够产生结构多样的活性次级代谢产物,发现化合物1、3、5具有P388细胞增殖抑制活性,并首次报道化合物4、6的抗H1N1病毒活性。     

海洋弧菌B2817的抗肿瘤活性成分研究

目的 对海洋弧茵B2817的抗肿瘤活性成分进行分离纯化和结构鉴定.方法采用溶剂萃取、制备HPLC等分离手段.对该菌株所产的活性成分进行了活性追踪分离.通过现代波谱学手段进行化学结构鏊定,以MTT法评价了化合物的抗肿瘤活性.结果从中分离得到4个化合物.分别鉴定为灵茵红素(1)、肉豆蔻酸(2)、7-十六碳烯酸(3)、7,10-十八碳二烯酸(4).化合物1对肿瘤细胞SM7721、S180具有强细胞毒活性.IC50分别为6.3、5.6μg·mL-1,而对人正常肝细胞HL-02无毒性.结论 4个化合物均为首次从该菌株中得到,而且弧菌B2817为灵茵红素的生产提供了新的来源.     

黄河三角洲植物真菌的分离、活性菌株的筛选及活性产物的鉴定

目的 从黄河三角洲植物中分离真菌,筛选具有抗菌或抗肿瘤活性菌株,分离鉴定活性成分。方法 蔗糖密度梯度法分离菌株,对其发酵物进行抗菌活性和细胞毒活性筛选,采用硅胶柱色谱、凝胶柱色谱对发酵产物进行分离、纯化,运用核磁共振、质谱等手段鉴定化合物的结构。结果 从黄河三角洲的9种植物样品中分离纯化真菌136株,筛选得到具有抑菌活性菌株25株、具有细胞毒活性菌株17株,并从1株枝孢属真菌Cladosporium sp. OUCMDZ-2046的发酵产物中分离鉴定了1个对白色念珠菌和人乳腺癌细胞株MCF-7具有抑制作用的化合物：桔青霉素。结论 黄河三角洲的植物真菌具有开发为药用活性菌株的潜力。     

南极海洋真菌Penicillium chrysogenum PR4-1-3的活性次级代谢产物研究

目的对一株具有明显细胞毒活性的南极海洋真菌Penicillium chrysogenum PR4-1-3的活性成分进行研究。方法采用溶剂萃取、柱色谱层析及制备HPLC等方法对菌株发酵产物进行活性追踪分离,通过理化性质及波谱学手段进行化学结构鉴定,以SRB法评价化合物的抗肿瘤活性,采用CPE方法对化合物1和2进行抗H1N1甲型流感病毒活性测试。结果从中分离得到5个芳香酚醌类化合物,其结构分别鉴定为secalonic acid D(1)s、ecalonic acid F(2)、chrysophanol(3)、emodin(4)和citreorosein(5)。这几个化合物均具有不同程度的细胞毒活性。化合物1在50μg.mL-1时,对H1N1病毒的抑制率为50%,具有一定的抗病毒活性。结论以上化合物均为首次从南极海洋微生物中分离得到,并初步发现secalonic acid D具有一定的抗H1N1病毒活性。     

黄槿内生真菌的次级代谢产物及其生物活性研究

目的对1株分离自广西红树林植物黄槿(Hibiscus tiliaceus)的内生真菌Penicilliumsp·LD-68的抗肿瘤活性成分进行研究。方法采用溶剂萃取、柱色谱层析及制备HPLC等方法对菌株发酵产物进行活性追踪分离,通过理化性质及波谱学手段进行化学结构鉴定,以SRB和MTT法评价化合物的抗肿瘤活性。结果从中分离得到5个弯孢霉菌素类化合物,其结构分别鉴定为curvularin(1)、dehydrocurvularin(2)、11-β-Hy-droxy-12-Oxocurvularin(3)、11-β-Hydroxycurvularin(4)、11-α-Hydroxycurvularin(5)。化合物1～5对A549、hela、BEL-7402、K562 4种人肿瘤细胞株具有不同程度的抑制作用,其中化合物2、3、4、5对hela细胞具有较好的抗肿瘤细胞活性,IC50分别为3.99、7.75、10.00、5.10μmol·L-1。结论首次测定了化合物3～5对A549、hela、BEL-7402、K562 4种肿瘤细胞系的细胞毒活性,其中对hela细胞显示出较高的抑制率。     

丰肉结海绵相关青霉菌HLS-216次级代谢产物研究

目的 研究我国南海水域丰肉结海绵相关青霉菌Penicillium sp.HLS-216的次级代谢产物的提取分离方法 、结构鉴定及其抗肿瘤、抗炎活性.方法 采用大米固体发酵培养,乙酸乙酯提取后,经硅胶柱色谱、Sephadex LH-20凝胶柱色谱、高级液相色谱等手段进行分离,并对分离得到的单体化合物应用质谱、核磁共振等技术进行结构鉴定;采用噻唑蓝(MTT)法和Griess法对分离得到的单体化合物进行抗肿瘤、抗炎活性筛选.结果 分离得到7个化合物,分别鉴定为:黑麦酮酸F(secalonic acid F,1)、黑麦酮酸D(secalonic acid D,2)、meleagrin(3)、oxaline(4)、对羟基肉桂酰胺(4-hydroxycinnamamide,5)、对羟基苯乙酸甲酯(methyl 4-hydroxyphenylacetate,6)、对羟基苯乙醛(4-hydroxyphenylacetonitrile,7).结论 化合物5和7为首次从青霉菌中分离得到;化合物1和2显示出较强的抗肿瘤活性,化合物4表现出一定的抑制小鼠腹腔巨噬细胞一氧化氮生成的作用.     

抗肿瘤动物类中药的研究进展

动物类中药资源丰富,其在肿瘤治疗中取得的疗效引起医药领域广泛关注,已成为抗肿瘤药物的一个新的研究热点。然而,抗肿瘤动物类中药成分复杂,其有效成分和作用机制尚有待进一步明确。综述常用抗肿瘤动物类中药及其活性成分、抗肿瘤动物类中药作用机制与临床应用,以期为抗肿瘤动物类中药的深入研究与开发提供参考。     

刺五加有效成分的抗肿瘤作用研究与评价

目的：研究刺五加有效成分的抗肿瘤作用进展。方法：分别介绍了刺五加中皂甙、多糖以及与黄芩联用的抗肿瘤作用研究,同时,对刺五加制剂治疗疾病的研究和评价做了总结,并对刺五加有效成分的抗肿瘤作用进行了展望。结果：刺五加有效成分具有一定的抗肿瘤作用。结论：临床医师应重视刺五加在抗肿瘤方面的作用,开发利用更多有效成分。     

Studies on the antitumor activity ofDuchesnea indicae Herba

As a part of finding the biologically active components fromDuchesnea indica (Andr.)Focke (Rosaceae), antitumor activities of its water soluble fractions have been studied. The fractions were examined for antitumor activity against sarcoma 180 implanted in mice. The antitumor inhibition ratios of the water soluble fractions fromDuchesnea indica were 17.9, 37.1, 62.7, 60.1, 62.4%, respectively.     

Largomycin FII chromophore component 4, a new pluramycin antibiotic

The chromophore of the antitumor chromoprotein largomycin FII is a mixture of components belonging to the pluramycin class of antitumor antibiotics. Against most organisms tested, component 4 exhibited activity equal to or greater than the major chromophore components pluramycin A and deacetylpluramycin A. Data obtained from UV, IR, 1H and 13C NMR, and from fast atom bombardment mass spectrometry were used to determine the structure of component 4 as epoxykidamycin, a new member of the pluramycin class.     

Structure and properties of major largomycin FII chromophore components

Largomycin FII, a protein antitumor antibiotic of molecular weight 29,300 daltons, contains a chromophore that is separable under mild denaturing conditions. The chromophore complex was found to be considerably less stable than the holoprotein towards light and heat, suggesting a protective effect of the protein on the chromophore. Separation of the chromophore into several components was achieved using high performance liquid chromatography, and the biological activity of the isolated components was determined. Data gathered from UV, IR, proton and carbon NMR, and fast atom bombardment mass spectrometry indicated that all the chromophore components belong to the pluramycin class of antitumor agents. Pluramycin A and deacetylpluramycin A were found to be the two major components.     

新型骨靶向抗肿瘤大黄酚衍生物的合成

目的: 利用大黄蒽醌类化合物的抗肿瘤作用与趋骨性,将大黄酚抗肿瘤药5-氟脲嘧啶及其衍生物连接,合成系列新型骨靶向抗肿瘤衍生物.方法: 合成大黄酚衍生物,MTT法测定其对肿瘤细胞增殖的抑制作用,用羟基磷灰石吸附试验评价该类药物的体外骨亲和性.结果: 合成了21个大黄酚衍生物均为新化合物.实验显示所有化合物均有不同程度的骨亲和性,大部分化合物的亲和性高于阳性对照药四环素.结论: 大黄酚衍生物具有良好的骨亲和性.     

台湾金线莲多糖的分离纯化及其体外抑瘤活性研究

目的研究台湾金线莲(Anoectochilus formosanus)的水溶性多糖(AFP)分离纯化条件,检测单一组分多糖的细胞活性及其结构。方法采用DEAE-Cellulose Fast Flow阴离子交换色谱和Sephadex G-200分离AFP,得到AFP-1和AFP-2两个水溶性单一多糖组分;采用红外光谱检测结构;检测AFP、AFP-1和AFP-2对SMMC-7721肝癌细胞,Hela宫颈癌细胞,spc-A1肺腺癌细胞和Bcap37人乳癌细胞进行细胞杀伤活性。结果AFP-1和AFP-2均为β-D型的吡喃糖环。AFP、AFP-1和AFP-2对癌细胞均具有较好的杀伤作用。结论台湾金线莲多糖(AFP、AFP-1和AFP-2)是非常有前景的抗肿瘤药物或辅助抗肿瘤药物。     

Analysis of cell cycle gene expression responding to acetoxyscirpendiol isolated from Paecilomyces tenuipes

Paecilomyces tenuipes is believed to contain potential oncostatic and tumor-reducing components. Molecular mechanism, however, is poorly understood concerning the potential antitumor components and their biological function. We purified acetoxyscirpendiol (ASD) from methanolic extracts (MPT) of the fungus and tested the two compounds for the molecular profile of their antitumor potential. Using a differential display protocol, cyclin C and Mad-1 were identified as candidate genes responding to MPT. When a quantitative PCR was performed on the total RNA from MCF-7 treated by MPT or ASD, gene expressions of cyclin C and Mad-1 were greatly augmented. In terms of protein expression, cyclin C level increased up to 12 folds in response to ASD as well as MPT. Similar as MPT treatments, ASD-treated cells synthesize cyclin C as 2-4 fold compared to the control treatments. In terms of Mad-1 expression in cells treated with ASD, the level of Mad-1 expression increased up to 2.5 folds by MPT treatment. Cyclin C expression was compared with non-treated cells in various cell lines. MCF-7 cell was shown highly responsive to the MPT or ASD treatment. Taken together, these results strongly indicate that MPT contains potential antitumor components which might exert their action by modulating cell cycle-related genes such as cyclin C and Mad-1 in MCF-7. The major antioncogenic component in MPT may be ASD which modulates cyclin C and Mad-1 expression.     

Drug interaction on antitumor drugs I. Antitumor activity of cyclophosphamide in mice consecutively administered aminopyrine, chlorpromazine, or morphine (author's transl)

Antitumor activity and lethality of cyclophosphamide alone and in combination with several drugs were investigated in male ddY mice. The antitumor activity was estimated by weighing the solid tumor on the 15th day after Ehrlich ascites cell inoculation. Pentobarbital induced sleeping time for monitoring the activity of hepatic drug-metabolizing enzymes was defined as the time between the loss and the recovery of the righting reflex. Consecutive administration of pentobarbital shortened the pentobarbital sleeping time and increased the antitumor activity after cyclophosphamide. On the contrary, a single administration of SKF 525A or cycloheximide prolonged the pentobarbital sleeping time significantly and decreased the antitumor activity after cyclophosphamide. Consecutive administration of aminopyrine, or chlorpromazine shortened the pentobarbital sleeping time and increased the antitumor activity after cyclophosphamide. These results indicate that aminopyrine and chlorpromazine may increase the levels of the hepatic drug-metabolizing components and may activate cyclophosphamide by conversion to an active form. Effect of a consecutive administration of morphine on the pentobarbital sleeping time and the antitumor activity was uncertain in individual cases.On the other hand, aminopyrine, chlorpromazine, or morphine in consecutive administration increased the lethality of cyclophosphamide.     

Relationship between inhibition of mitochondrial respiration by naphthoquinones, their antitumor activity, and their redox potential

The physicochemical properties of a series of 1,4-naphthoquinones were correlated with their activities against Sarcoma-180 by Hodnett et al. [J. med. Chem. 26, 570 (1983)]. Redox potential was the most important molecular parameter determining antitumor activity in this series of compounds, suggesting that interference with electron transport contributes to their cytotoxicity. We evaluated this same series of quinones for their abilities to inhibit the beef heart mitochondrial succinoxidase and NADH-oxidase enzyme systems. They exhibited a broad range of inhibitory potencies. There was a strong relationship between succinoxidase inhibition, antitumor activity (T/C ratio), and redox potential. The redox potentials of the quinones which inhibited succinoxidase lay within the narrow range of endogenous components of the respiratory chain. In contrast, inhibition of NADH-oxidase was related to redox potential but did not significantly predict antitumor activity. These results suggest that inhibition of mitochondrial succinoxidase may be a useful preliminary screen for antitumor activity.