共查询到19条相似文献，搜索用时 249 毫秒
1.
由于缺乏有效的靶向药物,顺铂（DDP）等一系列DNA损伤诱导剂一直是卵巢癌、睾丸癌等恶性肿瘤的重要临床治疗药物。然而,临床上出现的耐药性是限制该类药物应用的主要因素之一。药物增敏剂可以克服肿瘤细胞耐药性,从而增强化疗药物的抗肿瘤活性。在本研究中,我们旨在从上市药物中发现潜在的化疗药物增敏剂,并探索其潜在的作用机制。通过系统筛选,我们发现戒酒药物双硫仑（DSF）可以增强DDP的抗肿瘤活性。通过JC-1染色、碘化丙啶（PI）染色和蛋白质印迹等实验证实DSF和DDP的合用可协同促进肿瘤细胞发生凋亡。通过RNA测序结合基因富集分析（GSEA）以及免疫荧光等细胞生物学实验,我们发现DSF协同DDP抗肿瘤作用的潜在分子机制：DSF通过抑制范可尼贫血（FA）修复途径使肿瘤细胞更容易发生DNA损伤,因此可对包括铂类化疗药物在内的引起DNA损伤的药物产生增敏作用。我们的这项研究揭示了DSF在增强DDP抗肿瘤作用方面的潜在机制,为临床治疗中的DDP耐药提供了一种潜在的安全有效的解决方案。 相似文献
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跨损伤合成（translesion synthesis,TLS）是一种利用特殊的DNA聚合酶介导的修复过程,是细胞应答DNA损伤时的一种保守的耐受机制。由于TLS能使细胞耐受DNA损伤,降低肿瘤细胞对化疗药物或者放疗的敏感性,因此它可能是肿瘤产生耐药性或者辐射耐受性的潜在机制。通过靶向跨损伤合成通路,可提高包括神经胶质瘤在内的多种肿瘤患者的治疗疗效。 相似文献
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王瀚 《绵阳师范学院学报》2014,33(11):53-56
多肽是一类功能较强的生物活性分子.在细胞的生长、发育及细胞信号传递等方面扮演着重要角色.其具有分子量小、抗肿瘤特异性强且免疫原性较低等特性,已引起了人们的极大关注.多肽分子来源广泛,目前主要通过化学合成、生物体内提取及噬菌体肽库筛选技术等途径获得.靶向性多肽分子是一类值得关注的分子,通过与某些功能分子的偶联后作为分子探针,可实现肿瘤的靶向性诊断与治疗.主要综述了多肽分子在抗肿瘤研究过程中的应用途径及其前景. 相似文献
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磁场结合抗肿瘤药物作用于肿瘤细胞后能有效抑制肿瘤生长,这种观点己被近年来的许多实验所证实,本文论述了磁场联合抗肿瘤药物抑制肿瘤的生物学效应（包括对细胞生长活性、细胞膜、细胞周期以及荷瘤动物肿瘤生长、生存时间等各方面的影响）,从离体和在体两个方面对近年来抗肿瘤药物结合磁场在肿瘤治疗中的相关研究进展作了简要综述,并就该领域研究应用中可能出现的问题提出看法。 相似文献
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《荆门职业技术学院学报》2013,(3):2
荆楚理工学院"靶向抗肿瘤药物湖北省协同创新中心"于2012年12月被湖北省教育厅、湖北省财政厅共同批准建设。主要参与单位有华中科技大学、武汉长联来福制药股份有限公司、武汉百科药物开发有限公司。"中心"以创新为目标,以协同为手段,集聚各类人才,合理配置资源,运行有效机制。"中心"针对靶向抗肿瘤药物的关键技术及产品进行创新开发:①创新药物研究:设计并合成全新的靶向抗肿瘤药物的化合物实体和"Me—too"类创新药物;②创新工艺研究:改进现有靶向抗肿瘤药物的合成工 相似文献
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肿瘤微环境主要由肿瘤细胞、肿瘤相关间质细胞及细胞外基质组成。肿瘤细胞通过多种方式调控肿瘤微环境中的间质细胞,诱导间质细胞分化并发挥促肿瘤的作用,从而为肿瘤的生长及转移创造一个适宜的环境。DNA甲基化异常是肿瘤的特点。目前关于肿瘤的甲基化调控机制已有大量报道,对于肿瘤细胞与微环境中间质细胞的相互作用机制也有了一些报道。然而,关于肿瘤细胞对微环境间质细胞的甲基化调控机制以及这种调控对肿瘤发生发展的影响并没有系统的论述。本综述总结了肿瘤细胞对微环境中间质细胞甲基化调控机制的最新研究进展,以及间质细胞发生的一些促肿瘤改变,从而全面阐释了肿瘤细胞和间质细胞间的相互作用,同时总结了肿瘤细胞对肿瘤微环境的表观遗传学调控,尤其是甲基化调控在肿瘤进展中发挥了重要的作用。干预肿瘤细胞对微环境中间质细胞的甲基化调节过程,可以发挥抗肿瘤的作用。 相似文献
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目的:以脂质纳米载体为递药系统向肿瘤部位靶向输送难溶性抗肿瘤药物紫杉醇,实现药物的靶向递送。创新点:采用一端疏水化的透明质酸修饰脂质纳米载体,利用透明质酸与肿瘤部位高表达CD44的特异性结合,实现载药脂质纳米粒的靶向输送。方法:通过酰胺反应,将硬脂胺化学嫁接至透明质酸,制备透明质酸-硬脂胺嫁接物。采用水性溶剂扩散法制备脂质纳米粒,并将透明质酸-硬脂胺嫁接物插入脂质纳米粒的表面。使用红外染料Di R标记脂质纳米粒,通过小动物活体成像技术观察标记脂质纳米粒的体内分布。结论:透明质酸修饰的脂质纳米粒,可通过与CD44的特异性结合,实现抗肿瘤药物的靶向递送。 相似文献
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苦参碱的抗肿瘤机制较为广泛,包括抑制端粒酶活性、抑制肿瘤细胞增殖、抑制肿瘤细胞转移和诱导肿瘤细胞凋亡等．近年来,对苦参碱抗肿瘤机制的研究又有了新进展,相关研究已经深入到分子和基因水平,本文对近年来苦参碱抗肿瘤作用机制研究方面取得的最新进展进行了综述,并对苦参碱抗肿瘤作用的研究方向进行了展望． 相似文献
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Lu XF He GQ Yu HN Ma Q Shen SR Das UN 《Journal of Zhejiang University. Science. B》2010,11(12):923-930
Polyunsaturated fatty acids (PUFAs) possess anti-cancer action both in vitro and in vivo. In the present study, we detected
cell viability with methyl thiazolyl tetrazolium (MTT) assay and cell membrane permeability with propidium iodide (PI) fluorescence
dyeing, and calculated cell membrane fluidity change as fluorescence anisotropy. Fatty acid content in cells was measured
by gas chromatography/mass spectroscopy (GC/MS), and the relationship between fatty acid composition and cell viability was
studied. We observed that n-6 PUFA linoleic acid (LA) inhibited tumor cell growth at high concentrations (≥300 μmol/L), while low concentrations (100–200
μmol/L) seemed to promote cell proliferation. Analyses of cell membrane permeability, cell membrane fluidity, and cell fatty
acid composition suggested that the anti-cancer action of LA could be related to changes in the ratio of n-6 to n-3 PUFAs. We observed that pre-incubation of cancer cells with 100 μmol/L LA for 24 h enhanced cell sensitivity to the cytotoxic
action of LA, whereas undifferentiated cell line LoVo seemed to have a distinct path in LA-induced death. These results showed
that one of the mechanisms by which supplementation of LA induces cancer cell death could be altering the ratio of n-6/n-3 PUFAs, and this may be related to cell differentiation status. 相似文献
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Epigallocatechin-3-gallate (EGCG) has shown remarkably anti-cancer activity, with its bioactivity being related to reactive conditions, such as pH and metal ions. The present study investigated the degradation of EGCG and its effect on prostate cancer cell in the presence of Cu2 . EGCG was incubated with prostate cancer cells, 相似文献
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Shi Z Bai R Fu ZX Zhu YL Wang RF Zheng S 《Journal of Zhejiang University. Science. B》2012,13(1):11-19
Objective
We aimed to perform a preliminary study of the association between induced pluripotent stem cell (iPS)-related genes and biological behavior of human colorectal cancer (CRC) cells, and the potential for developing anti-cancer drugs targeting these genes. 相似文献14.
Bingyu SUN Yongqiang LIU Danhua HE Jinke LI Jiawei WANG Wulin WENS Ming HONG 《Journal of Zhejiang University. Science. B》2021,22(3):190-203
The rapidly developing resistance of cancers to chemotherapy agents and the severe cytotoxicity of such agents to normal cells are major stumbling blocks in current cancer treatments.Most current chemotherapy agents have significant cytotoxicity,which leads to devastating adverse effects and results in a substandard quality of life,including increased daily morbidity and premature mortality.The death receptor of tumor necrosis factor-related apoptosis-inducing ligand(TRAIL)can sidestep p53-dependent pathways to induce tumor cell apoptosis without damaging most normal cells.However,various cancer cells can develop resistance to TRAIL-induced apoptosis via different pathways.Therefore,it is critical to find an efficient TRAIL sensitizer to reverse the resistance of tumor cells to TRAIL,and to reinforce TRAIL’s ability to induce tumor cell apoptosis.In recent years,traditional Chinese medicines and their active ingredients have shown great potential to trigger apoptotic cell death in TRAIL-resistant cancer cell lines.This review aims to collate information about Chinese medicines that can effectively reverse the resistance of tumor cells to TRAIL and enhance TRAIL’s ability to induce apoptosis.We explore the therapeutic potential of TRAIL and provide new ideas for the development of TRAIL therapy and the generation of new anticancer drugs for human cancer treatment.This study involved an extensive review of studies obtained from literature searches of electronic databases such as Google Scholar and PubMed."TRAIL sensitize"and"Chinese medicine"were the search keywords.We then isolated newly published studies on the mechanisms of TRAIL-induced apoptosis.The name of each plant was validated using certified databases such as The Plant List.This study indicates that TRAIL can be combined with different Chinese medicine components through intrinsic or extrinsic pathways to promote cancer cell apoptosis.It also demonstrates that the active ingredients of traditional Chinese medicines enhance the sensitivity of cancer cells to TRAIL-mediated apoptosis.This provides useful information regarding traditional Chinese medicine treatment,the development of TRAIL-based therapies,and the treatment of cancer. 相似文献
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熊果酸和齐墩果酸为同分异构体,同属五环三萜类化合物,具有多种生物活性,如抗肿瘤、抗HIV、抗炎、降糖、保肝、抗疟等生物活性。本文以具有一定生物活性的熊果酸和齐墩果酸为先导化合物,通过对它们C．28位甲酯化及C．3位导入D-苯甘氨酸,共设计合成了4种未见报道的熊果酸、齐墩果酸衍生物,利用IR和1HNMR波谱技术对其结构进行了表征。然后对目标产物进行了人神经胶质瘤U87AGEFR细胞和人肺癌细胞PC9／G体外抗癌活性测试。结果表明U-3对两种癌细胞的抑制作用明显优于熊果酸和齐墩果酸。 相似文献
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目的:通过端粒酶的数量变化来探讨瑞香狼毒提取物对肺癌细胞NCI-H446[H446]的抗肿瘤作用。方法:体外培养肺癌细胞NCI-H446[H446]细胞株,以不同浓度的瑞香狼毒提取物作用24h后,用荧光标记的方法定量检测端粒酶。结果:瑞香狼毒提取物作用人肺癌细胞提取物NCI-H446[H446]后,端粒酶的数量明显减少并呈现与剂量的正相关性。结论:瑞香狼毒提取物对肺癌细胞NCI-H446[H446]具有明显的抗肿瘤作用。 相似文献
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顺铂是目前治疗癌症最有效的药物之一,测定细胞内顺铂的含量对于了解细胞摄取顺铂和顺铂发挥药效有重要作用．本研究通过MTT法检测了顺铂杀伤K562细胞的有效浓度,建立并利用高效液相色谱法（HPLC）检测了K562细胞对顺铂的摄入．结果表明K562细胞经10μg/mL顺铂处理12h后,细胞活性显著下降;细胞外有36．75％顺铂进入胞内．实验数据显示,顺铂对K562细胞的杀伤与其在胞内的累积相关． 相似文献
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组织干细胞再生能力的减退可导致衰老。具有自我更新能力的干细胞由于少数癌基因突变被赋予恶性化,而功能交叉的肿瘤抑制机制-p16 INK4 a-Rb,ARF-p53和端粒-则避免这种恶性化的发生。然而这些信号途径同时可能会抑制干细胞的生存,因此促成衰老。文章综述端粒机制及其在降低干细胞修复再生能力而促进衰老过程中的作用,以及衰老和癌两者相互间的关系。 相似文献
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LuDa－yong CAOJing－yi 《上海大学学报(英文版)》2001,5(2):164-170
Sialic acids (neuraminic cids)are a special series of 9-carbon ring negatively charged carbohydrates,which has been found to be selectively changed in malignant cells from structures(both synthesis and structure modifications)to functions(up and down regulation in cells),Sialic acids,in single forms or conjugates.have been systematically studied both in lab and in clinics by GC,GCMS,NMR,HPTLC,HPLC and other modern analytical means.Sialic acids and related conjugates are predicted to be used in cancer diagnosis,cancer prognostic forecasting,designing of cancer chemotherapy regimens,uncovering carcinogenetic processes and neoplasm metastasis.Tumor cell regulative system and pathways are correlated with sialic acids,which can be applied to prognostic evaluation of cancer patients,and antimetastatic chemotherapy by sialic acid derivatives and analogues,Searching for new biological characteristics of sialic acids in cells have also been extensively studied these days.In this paper,main stream discoveries and advancements are provided.also discussions of possible mechanisms and hypotheses are invoked. 相似文献