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记者近期从云南大学获悉,该校与西安交通大学研究团队合作,日前发展了一种新颖的银催化合成方法,高效精准地合成了一系列结构多样的多取代吡咯类化合物。这一合成策略对高效合成抗肿瘤生物碱Lamellarin L具有重大意义。 相似文献
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20世纪60年代,美国密执安州立大学Rosenberg发现了顺铂具有抗癌活性,开辟了金属类抗肿瘤药物研究的新领域.经过40余年的研究,已相继成功开发了卡铂、奈达铂、奥沙利铂、舒铂、洛铂和双环铂等铂类抗肿瘤药物.虽然对于铂类抗肿瘤药物研究取得了一定的成绩,但在临床使用过程中也存在一些问题,如其毒副作用和抗药性,限制了其在临床上的进一步广泛应用.为了解决这些问题,科研工作者开始寻找新的金属类抗肿瘤药物以弥补现有铂类抗肿瘤药物的不足.在金属元素中,唯有钯(II)与铂(II)配合物具有相似或相同的结构特征,进而表现出相近或相似的化学性质.因此,继铂类抗肿瘤配合物后,钯(II)配合物作为潜在抗肿瘤药物成为一个诱人的领域.本文综述了近年来钯(II)类抗肿瘤药物的研究进展,并探讨了其构效关系,这对于指导新型钯(II)类抗肿瘤药物的合成具有重要的参考价值. 相似文献
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放线菌素D新类似物的设计、合成与体外抗肿瘤活性 总被引:1,自引:0,他引:1
为了提高临床抗肿瘤药物放线菌素D(AMD)的抗肿瘤效果和治疗指数,在AMD构效关系研究基础上,设计全合成了包括9个新类似物在内的两类共13个AMD类似物.保持环肽2位D-Val不变,环肽5位分别用Sar,D-Me-Leu和Me-Ile等氨基酸替换以改变侧链基团长度,合成了类似物8b~8e;以环肽2位D-Phe替换的低毒性类似物[D-Phe2]2AMD为基础,在环肽5位进行氨基酸替换,改变侧链基团长度和空间指向,并引入芳香族氨基酸等,合成了类似物8f~8m.优化了类似物的合成中的反应条件,提高了五肽环化产率,避免了消旋产物的生成.所有类似物经[α]D,1HNMR和高分辨质谱表征后,采用MTT法进行了体外抗肿瘤活性筛选,结果表明,保留环肽2位D-Val及延长5位氨基酸侧链基团能显著提高类似物的抗肿瘤活性,而2位D-Phe替换后类似物的抗肿瘤活性普遍下降. 相似文献
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碳环核苷是呋喃糖环部分被碳环基团取代的核苷类似物.作为天然核苷的类似物,许多碳环核苷具有良好的抗病毒、抗肿瘤活性.同时,由于不存在典型的糖苷键,碳环核苷较天然核苷对于磷酸化酶和水解酶具有更高的代谢稳定性.因此,对碳环核苷类似物进行设计与合成,并筛选出安全有效的抗病毒试剂成为近年来药物化学家们研究的重点.按照碱基种类的不同综述了近5年来碳环核苷的合成研究进展,分为嘌呤类碳环核苷、嘧啶类碳环核苷以及碳环C-核苷等三部分,重点介绍了嘌呤类碳环核苷的合成研究,并对碳环核苷未来的研究趋势进行了展望. 相似文献
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为了发现新型姜黄素类抗肿瘤先导化合物,通过1,3-偶极环加成反应合成了14个螺杂环单羰基姜黄素类似物.该反应利用无需加催化剂的"一锅煮"方法合成,具有环境友好的优点.所有化合物结构经ESI-MS、ESI-HRMS和1H NMR确认,通过X衍射确证B6的晶体结构为单斜晶系,该类化合物的合成具有良好的区域选择性和立体选择性.通过噻唑兰(MTT)法测定所有化合物对人胃癌细胞SGC-7901、神经胶质瘤细胞U251、人大细胞肺癌细胞株NCI-H460的增殖抑制活性,部分化合物表现出了较好的活性.其中B1、B6、B7和B11对三种肿瘤细胞均表现出较好的抗肿瘤活性,而对正常人肝细胞HL-7702显示了相对较低的细胞毒性.化合物B1和B7均能明显诱导凋亡相关蛋白含半胱氨酸的天冬氨酸蛋白水解酶3(caspase3)和多聚ADP-核糖聚合酶(PARP)的活化,诱导肿瘤细胞发生凋亡.所合成的螺杂环单羰基姜黄素类似物为新型的抗肿瘤化合物,该类化合物可能在靶向抗肿瘤药物研发方面具有较好的研究前景. 相似文献
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Facile and Divergent Synthesis of Lamellarins and Lactam‐Containing Derivatives with Improved Drug Likeness and Biological Activities 下载免费PDF全文
Atiruj Theppawong Dr. Poonsakdi Ploypradith Prof. Dr. Pitak Chuawong Prof. Dr. Somsak Ruchirawat Dr. Montakarn Chittchang 《化学:亚洲杂志》2015,10(12):2631-2650
With the goal to improve the aqueous solubility of lamellarins, the lactone ring in their skeleton was replaced with a lactam moiety in azalamellarins. However, the reported synthetic route produced such derivatives in very low yields. Hence, this study focused on developing an efficient simplified total synthetic scheme that could furnish both azalamellarins and the parent lamellarins from the same pyrrole ester intermediates. Subsequent comparative profiling revealed that the introduced lactone‐to‐lactam replacement rendered these molecules less lipophilic, whereas their cancer cytotoxicity remained equipotent to that of the parent compounds. Interestingly, their inhibitory activity was significantly enhanced towards the multifaceted GSK‐3β enzyme. Our results clearly demonstrate the therapeutic potential of this promising class of marine‐derived natural products and justify their further development, especially into anticancer agents. 相似文献
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Poonsiri Thipnate Montakarn Chittchang Nopporn Thasana Patchreenart Saparpakorn Poonsakdi Ploypradith Supa Hannongbua 《Monatshefte für Chemie / Chemical Monthly》2011,13(4):97-109
Abstract
The common structural requirements for cytotoxicity of lamellarins against two human breast cancer cell lines were determined using comparative molecular field analysis (CoMFA) and comparative molecular similarity indices analysis (CoMSIA) techniques. Twenty lamellarins were selected to serve as the training set, whereas another group of six compounds were used as the test set. The best CoMFA and CoMSIA models for both cell lines yielded satisfactory predictive ability with r cv2 values in the range of 0.659–0.728. Additionally, the contour maps obtained from both the CoMFA and CoMSIA models agreed well with the experimental results and may be used in the design of more potent cytotoxic compounds for human breast cancers. Both analyses not only suggested structural requirements of various substituents around the lamellarin skeleton for their cytotoxic activity against both human breast cancer cell lines but also revealed the molecular basis for the differences between the saturated and unsaturated D-rings of the lamellarins. 相似文献13.
Fabien Plisson Xiao‐Cong Huang Dr. Hua Zhang Zeinab Khalil Prof. Robert J. Capon 《化学:亚洲杂志》2012,7(7):1616-1623
Chemical analysis of a Didemnum sp. (CMB‐01656) collected during scientific Scuba operations off Wasp Island, New South Wales, yielded five new lamellarins A1 ( 1 ), A2 ( 2 ), A3 ( 3 ), A4 ( 4 ) and A5 ( 5 ) and eight known lamellarins C ( 6 ), E ( 7 ), K ( 8 ), M ( 9 ), S ( 10 ), T ( 11 ), X ( 12 ) and χ ( 13 ). Analysis of a second Didemnum sp. (CMB‐02127) collected during scientific trawling operations along the Northern Rottnest Shelf, Western Australia, yielded the new lamellarin A6 ( 14 ) and two known lamellarins G ( 15 ) and Z ( 16 ). Structures were assigned to 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 on the basis of detailed spectroscopic analysis with comparison to literature data and authentic samples. Access to this unique library of natural lamellarins ( 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 ) provided a rare opportunity for structure–activity relationship (SAR) investigations, probing interactions between lamellarins and the ABC transporter efflux pump P‐glycoprotein (P‐gp) with a view to reversing multidrug resistance in a human colon cancer cell line (SW620 Ad300). These SAR studies, which were expanded to include the permethylated lamellarin derivative ( 17 ) and a series of lamellarin‐inspired synthetic coumarins ( 19 , 20 , 21 , 22 , 23 , 24 ) and isoquinolines ( 25 , 26 ), successfully revealed 17 as a promising new non‐cytotoxic P‐gp inhibitor pharmacophore. 相似文献
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Omolola R. Oyenihi Ayodeji B. Oyenihi Joseph O. Erhabor Motlalepula G. Matsabisa Oluwafemi O. Oguntibeju 《Molecules (Basel, Switzerland)》2021,26(21)
Metabolite profiling of cancer cells presents many opportunities for anticancer drug discovery. The Chinese, Indian, and African flora, in particular, offers a diverse source of anticancer therapeutics as documented in traditional folklores. In-depth scientific information relating to mechanisms of action, quality control, and safety profile will promote their extensive usage in cancer therapy. Metabolomics may be a more holistic strategy to gain valuable insights into the anticancer mechanisms of action of plants but this has remained largely unexplored. This review, therefore, presents the available metabolomics studies on the anticancer effects of herbal medicines commonly used in Africa and Asia. In addition, we present some scientifically understudied ‘candidate plants’ for cancer metabolomics studies and highlight the relevance of metabolomics in addressing other challenges facing the drug development of anticancer herbs. Finally, we discussed the challenges of using metabolomics to uncover the underlying mechanisms of potential anticancer herbs and the progress made in this regard. 相似文献
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Lv G He F Wang X Gao F Zhang G Wang T Jiang H Wu C Guo D Li X Chen B Gu Z 《Langmuir : the ACS journal of surfaces and colloids》2008,24(5):2151-2156
Novel nanocomposites of polylactide (PLA) nanofibers and tetraheptylammonium-capped Fe3O4 magnetic nanoparticles have been prepared and utilized to realize the efficient accumulation of anticancer drug daunorubicin in target cancer cells. The observations of optical microscopy and confocal fluorescence microscopy indicate that the PLA nanofibers and Fe3O4 nanoparticles may contribute to their beneficial effects on intracellular drug uptake of leukemia K562 cell lines in which the efficiently enhanced accumulation of anticancer drug daunorubicin on the membrane of cancer cells could be observed. Meanwhile, the electrochemical detection and the microculture tetrazolium studies were also explored to probe the effect of the relevant nanomaterials on the drug uptake of cancer cells. The results illustrate that the nanocomposites could effectively facilitate the interaction of daunorubicin with leukemia cells and remarkably enhance the permeation and drug uptake of anticancer agents in the cancer cells, which could readily lead to the induction of the cell death of leukemia cells. This observation suggests a new perspective for the targeted therapeutic approaches of cancers. 相似文献
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Dual‐Functional Nanographene Oxide as Cancer‐Targeted Drug‐Delivery System to Selectively Induce Cancer‐Cell Apoptosis 下载免费PDF全文
Binwei Zhou Dr. Yanyu Huang Dr. Fang Yang Dr. Wenjie Zheng Dr. Tianfeng Chen 《化学:亚洲杂志》2016,11(7):1008-1019
Construction of bioresponsive drug‐delivery nanosystems could enhance the anticancer efficacy of anticancer agents and reduce their toxic side effects. Herein, by using transferrin (Tf) as a surface decorator, we constructed a cancer‐targeted nanographene oxide (NGO) nanosystem for use in drug delivery. This nanosystem (Tf‐NGO@HPIP) drastically enhanced the cellular uptake, retention, and anticancer efficacy of loaded drugs but showed much lower toxicity to normal cells. The nanosystem was internalized through receptor‐mediated endocytosis and triggered pH‐dependent drug release in acidic environments and in the presence of cellular enzymes. Moreover, Tf‐NGO@HPIP effectively induced cancer‐cell apoptosis through activation of superoxide‐mediated p53 and MAPK pathways along with inactivation of ERK and AKT. Taken together, this study demonstrates a good strategy for the construction of bioresponsive NGO drug‐delivery nanosystems and their use as efficient anticancer drug carriers. 相似文献
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Fractionation of a southern Australian marine sponge, Ianthella sp., yielded sixteen metabolites including a new class of pyrrolidone, ianthellidones A-F (1-6), a new class of furanone, ianthellidones G-H (7-8), new and known lamellarins, lamellarins O1 (9), O2 (10), O (11) and Q (12), plus the known 4-hydroxybenzaldehyde (13), 4-hydroxybenzoic acid (14), 4-methoxybenzoic acid (15) and ethyl 4-hydroxybenzoate (16). Structures for all Ianthella metabolites were determined by detailed spectroscopic analysis, supported by a plausible biosynthetic relationship. The ianthellidones were non-cytotoxic towards two human colon cancer cell lines (SW620 and SW620 Ad300), as well as Gram +ve and Gram -ve bacteria, and a fungus. Ianthellidone F (6) and lamellarins O2 (10) and O (11) displayed modest BACE inhibitory properties (IC(50) > 10 μM), while lamellarin O1 (9) was more potent (IC(50) < 10 μM). Lamellarin O (11) exhibited modest cytotoxicity towards SW620 and SW620 Ad300 cell lines (IC(50) > 22 μM), was an inhibitor of the multi-drug resistance efflux pump P-glycoprotein, and displayed selective growth inhibitory activity against the Gram +ve bacterium Bacillus subtilis (ATCC 6633) (IC(50) 2.5 μM). 相似文献
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Hiraka K Kanehisa M Tamai M Asayama S Nagaoka S Oyaizu K Yuasa M Kawakami H 《Colloids and surfaces. B, Biointerfaces》2008,67(1):54-58
We prepared an anticancer drug based on a pH-sensitive liposome retaining Fe-porphyrin as an SOD mimic. The liposomes contained cationic/anionic lipid combinations and were composed of Fe-porphyrin, 1,2-dimyristoyl-sn-glycero-3-phosphatidylcholine, dimethylditetradecylammonium bromide, sodium oleate, and Tween-80. The Fe-porphyrin was released from the liposome at low pH, and the cytotoxicity for cancer cells by the liposome depended on the acidic environments of the endosomes in the cells. Furthermore, although the liposome exhibited an excellent anticancer effect on a gastric cancer cell line, the SOD activity of Fe-porphyrin was shown to have a significant influence on the cytotoxicity toward cancer cells. These findings suggest that the pH-sensitive liposome retaining the Fe-porphyrin as an SOD mimic promises to be a novel anticancer drug for endosomal escape. 相似文献
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《Arabian Journal of Chemistry》2022,15(3):103649
The systemic toxicity of anticancer drugs regularly restricts the use of conventional chemotherapy to treat cancer. In this study, the limitations overcome by profitably fabricating a multifunctional nanocarrier system to carry the anticancer drug into the specific location of the cancer cells. The polyethylene glycol (PEG) was functionalized in the carboxylated multiwalled carbon nanotubes (MWCNT-COOH) through an esterification reaction (MWCNT-PEG). The targeting ligand of folic acid (FA) was covalently bonded with hyperbranched poly-L-lysine (HBPLL) using adipic acid (AA) as a cross-linking agent. Doxorubicin (DOX), an anticancer drug, was effectively loaded on MWCNT-PEG-AA-HBPLL-FA carrier loading, and in-vitro drug release was investigated by UV–Vis spectrophotometer. The chemical functionalization, morphological properties, crystalline nature, surface charge, and thermal stability of the synthesized materials were studied by FT-IR, FE-SEM, HR-TEM, DLS, and TGA techniques. In-vitro cytotoxicity and anticancer properties of DOX-loaded nanocarrier were studied in human liver cancer (HepG2) cells and human embryonic kidney (HEK293) cells. The activities of caspases (caspase ?3, ?8 & ?9) were analyzed using luminometry. The intrinsic apoptosis pathway proteins (Bcl-2 & BAX) were determined by western blot and RT-PCR analysis. The synthesized DOX-loaded nanocarriers exhibited increased cytotoxicity and apoptosis in liver HepG2 cells. The results suggest that the DOX-loaded nanocarrier possesses strong anticancer properties and could be an applicable and potential drug carrier for liver cancer chemotherapy. 相似文献
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《Arabian Journal of Chemistry》2022,15(11):104168
Quinoline is an efficient scaffold for anticancer drug development as its derivatives have shown potent results through several mechanisms like growth regulators through “apoptosis, disruption of cell migration, inhibition of angiogenesis, modulation of nuclear receptor responsiveness and cell cycle arrest, etc.,” The potential of quinoline derivatives has been proved in several cancer cell lines like breast cancer, colon cancer, lung cancer, colorectal cancer, renal cancer, etc. This review article aims to provide information about the synthesis, potential of the anticancer property, cytotoxicity, and level of clinical treatments, which could lay out the research to develop more effective quinoline-derived anticancer drugs. 相似文献