44 research outputs found

    A study on Anti- DR5 mAb inducing mouse Hepatocellular carcinoma cells Apoptosis

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    原发性肝癌是我国常见恶性肿瘤之一,居我国癌症发病率的第二位,每年约有13万人死于肝癌。近些年来其发病率和死亡率有逐年升高的趋势。由于其具有侵袭性强、易复发、转移等生物学特性,目前包括手术、放疗、化疗等各种治疗方法的效果均不佳,而生物治疗在肝癌综合治疗中的应用取得较大进展,成为肿瘤治疗的第四模式。死亡受体5(DR5/TRAILR2)是TRAILR中的一员,属于肿瘤坏死因子受体超家族。当它与相关配体结合时,能选择性地杀伤多种肿瘤细胞而对正常细胞没有毒性,曾被誉为最有发展前途的抗肿瘤靶点。本文将抗Anti-DR5mAb体内、外作用于鼠肝癌细胞,并联合应用化疗药物阿霉素(ADM)或放线菌素-D(ACT...Death receptor 5 (TRAIL-R2), a member of the TRAILR, belonging to tumor necrosis factor receptor superfamily. When DR5 is binding to its ligand, they can selectively destruct a variety of tumor cells and have no cytotoxicity to normal live cells and other cells. DR5 has been known as the most promising anticancer drug. Primary hepatic carcinoma is one of common malignant tumors, its attack rate oc...学位:理学硕士院系专业:生命科学学院生物化学与生物技术系_生物化学与分子生物学学号:2005130212

    Synthesis of PPARα agonist OEA analogue and study of the effects about anti-atherosclerosis

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    过氧化物酶体增殖物激活受体(PPARs)是一类由配体激活的核转录因子,是核受体超家族成员之一。过氧化物酶体增殖物激活受体α(PPARα)是PPARs中的一个亚型,它是脂质、脂肪酸、脂蛋白代谢的调节因子。PPARα的配体可分为天然配体和合成配体。天然配体主要来源于饮食和机体的代谢产物,如长链不饱和脂肪酸,包括油酸、亚油酸、花生四烯酸等。合成配体有贝特类降血脂药,如WY14643、非诺贝特等等。动脉粥样硬化是一类复杂的临床疾病,其所致冠状动脉粥样硬化性心脏病的发病率逐年升高,它的形成机制目前尚未完全清楚。PPARα在单核巨噬细胞、内皮细胞以及平滑肌细胞均有表达,显示了它的直接血管效应,可能具有抗动...Atherosclerosis is a major cause of death from cardiovascular disease in industrialized countries. Adhesion of circulating leukocytes to the endothelium is a critical early step in atherogenesis. This process depends on the interaction between adhesion molecules on the endothelial cell(EC) surface and their cognate ligands on leukocytes, these EC adhesion molecules include vascular cell adhesion m...学位:理学硕士院系专业:化学化工学院化学系_有机化学学号:2052006115192

    三角范畴定义中八面体公理的等价命题及其应用

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    三角范畴是一个带有自同构的加法范畴,并且满足4 条公理,其中的1 条重要公理是八面体公理. 由Grothen2 dick2Verdier 在上个世纪60 年代提出的八面体公理相对于其它3 条公理形式比较复杂,应用起来比较不方便. 因此研究 八面体公理的其它等价命题引起了人们的兴趣. 本文在王济荣工作的基础上给出八面体公理的第1 个等价命题,再利用 对偶的思想导出八面体公理的第2 个等价命题。最后利用homotopy cartesian 得到八面体公理的第3 个等价命题,并利 用第3 个等价命题简化Peng 和Tan 的证明

    血管内皮细胞生长抑制因子的研究进展

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    血管内皮细胞生长抑制因子(vascularendothelialgrowthinhibitor,VEGI)是一种新型的血管内皮细胞生长抑制因子,属于TNF超家族,是Ⅱ型跨膜蛋白。重组VEGI不仅可以抑制内皮细胞增殖和诱导血管内皮细胞凋亡,而且可阻止新生血管生成,从而产生抗肿瘤生长的作用。VEGI作为一个内皮细胞产生的血管生成负调控因子可激活JNK、P38MAPA及胱冬肽,也可激活NF-κB,从而诱导内皮细胞的凋亡。VEGI的N段部分缺失可影响其生物活性,具有重要的病理生理意义,在肿瘤生物治疗方面有很大的应用前景

    中央苏区图书馆文献资源的采集工作研究

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    中央苏区时期,面对敌人的经济封锁和刚起步的图书出版发行工作,图书馆文献资源采集工作异常艰难。在党和苏维埃政府颁布的一系列法规和指令下,中央苏区的工作者明确了文献资源的采集原则,开拓多方渠道加强了文献资源采集工作,为当今图书馆文献资源采集工作提供借鉴和参考

    药理学实验教学改革与实践

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    为提高学生学习能力、思考能力、动手能力和创新能力,厦门大学医学院着力于药理学实验教学改革,从提高教师的专业素养、增强实验室硬件建设、改革实验教学内容、开展设计性实验四个方面阐述了药理学实验教学改革与实践的成果

    The effect of s-Oleylpropanolamide on the expression of cell adhesion molecules in human umbilical vein endothelial cells

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    目的探讨s-油酰丙醇胺对用肿瘤坏死因子α(TNF-α)诱导的人脐静脉内皮细胞黏附分子(VCAM-1,I-CAM-1,E选择素)表达的影响。方法从新鲜的脐带中分离出人脐静脉内皮细胞,培养至3~9代,用不同浓度的s-油酰丙醇胺(10,50,100μmol/L)孵育12 h后,用TNF-α(20 ng/mL)孵育8 h,采用荧光实时定量PCR和细胞酶联免疫吸附试验分别检测VCAM-1,ICAM-1,E选择素的mRNA及蛋白的表达,同时采用细胞黏附实验检测其对细胞黏附的影响。结果相对于正常的人脐静脉内皮细胞,TNF-α诱导后的人脐静脉内皮细胞黏附分子(VCAM-1,ICAM-1,E-选择素)的表达明显增加。s-油酰丙醇胺可以显著的抑制VCAM-1的表达,并呈现出一定的剂量依赖性,而且对人急性单核细胞性白血病细胞(THP-1)的黏附也有明显的抑制作用,但对ICAM-1,E-选择素的表达却没有影响。结论s-油酰丙醇胺和大多数的PPARα激动剂一样,能够抑制慢性炎症,减少单核细胞的黏附,抑制VCAM-1的表达,而对急性炎症没有作用,如对E-选择素的表达无影响。 【英文摘要】 Purpose To investigate the effect of s-Oleylpropanolamide on the expression of cell adhesion molecules such as VCAM-1,ICAM-1,E-selectin in human umbilical vein endothelial cells(HUVECs).Methods HUVECs were pretreated with different concentrations of s-Oleylpropanolamide for 12 h and then stimulated with TNF-α for 8 h.Cell Enzyme linked immunsorbendt assay.Real-time PCR and adhesion assay were performe to measure the expression of ahesion molecules in mRNA and protein levels and monocyte binding.Results s-Ol...厦门市科技计划高校创新项目(3502Z20083007);; 厦门大学“活性有机小分子的合成化学与化学生物学”创新团队项

    Effect of oleoylethanolamide on expression of vascular cell adhesion molecule-1 in human umbilical vein endothelial cells

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    目的探讨油酰乙醇胺(OEA)对肿瘤坏死因子α(TNF-α)诱导的人脐静脉内皮细胞血管细胞黏附分子-1(VCAM-1)表达的影响。方法体外培养人脐静脉内皮细胞,分别加入3种不同浓度的OEA(10,50,100μmol/L)或非诺贝特(10,50,100μmol/L)共同孵育10 h,再加入TNF-α共同孵育6 h,采用实时定量逆转录聚合酶链式反应和酶联免疫吸附剂检测测定VCAM-1以及mRNA和蛋白的表达,并采用Western blot方法检测过氧化物酶体增殖物激活受体α(PPAR-α)的蛋白表达。结果与非诺贝特相比,不同浓度的OEA更加显著地抑制人脐静脉内皮细胞VCAM-1mRNA和蛋白的表达,随着浓度的增大,抑制作用逐渐增强。Western bolt结果显示OAE能明显增强PPAR-α蛋白的表达。结论OEA对TNF-α引起的内皮细胞受损起到保护作用,其机理可能与上调过PPAR-α有关。 【英文摘要】 Purpose To investigate the effect of oleoylethanolamide(OEA) on tumor necrosis factor α(TNF-α)induced the expression of vascular cell adhesion molecule-1(VCAM-1) in human umbilical vein endothelial cells(HUVECs).Methods OEA and fenofibrate of different concentrations were incorporated in HUVECs for 10 hours respectively.Human recombinant TNF-α was then incubated with HUVECs for 6 hours.The expression of VCAM-1 in mRNA level and protein level was detected by real-time quantitative RT-PCR and enzyme linked im...厦门大学“活性有机小分子的合成化学与化学生物学”创新团队项目;; 厦门市科技局科技计划350Z20083007项

    Fas ligand and Anti-human DR5 monoclonal antibody induce tumor cell lines apoptosis

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    目的探讨FasL、Anti-DR5mAb对肿瘤细胞Hela、BGC823、MCF-7、L342、H9101、D6的杀伤作用及机制。方法采用RT-PCR、MTT比色法、电泳、DNA倍体分析、Westernblot等方法。结果H9101、Hela细胞株DR5mRNA水平有表达,D6细胞无表达;H9101、L342细胞株FasmRNA水平有表达,D6细胞无表达。H9101、L342细胞株对FasL、Anti-DR5mAb敏感并呈剂量依赖性;MCF-7、BGC823细胞株对FasL敏感,对Anti-DR5mAb相对敏感。Hela对FasL相对敏感,对Anti-DR5mAb敏感;D6对两种凋亡诱导剂耐受。结论FasL、Anti-DR5mAb能不同程度地诱导肿瘤细胞凋亡,其机制与Fas、DR5、Caspase-8、Bcl-2的表达有关。 【英文摘要】 Objective:To study the cytotoxic effects on tumor cell lines Hela,BGC823,MCF-7,L342,H9101,D6 induced by Fas ligand and anti-human DR5 monoclonal antibodies(Anti-DR5 mAb) and the underlying mechanism.Methods:Fas/DR5 mRNA were detected by RT-PCR. Cytotoxicity exerted by FasL/Anti-DR5 mAb on tumor cell lines was measured by MTT colorimetry and the induced apoptosis was determined by agarose gel electrophoresis.Results:The expression of DR5 on BGC823 and Hela cells were higher and DR5 didn’t express in D6. The ...厦门大学科研启动基金(No.Z03103)资

    Characterizing Nitrogen Saturation of the Wuchuan Headwater Stream in the Southeast of China

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    以九龙江流域典型的农业源头溪流——五川溪为研究区域,开展每月一次共2年的nO3-采样用于溪流氮饱和特征的研究.结果表明,2005年和2007年溪流的nO3-浓度分别为35.5~319.5μEQl-1和5.0~353.6μEQl-1,根据STOddArd和TrAAEn提出的氮饱和划分准则,五川流域分别处于氮饱和阶段2/3和阶段2,接近氮饱和.氮饱和阶段随着nO3-浓度的增加而上升,五川溪流的氮饱和阶段存在着时间上的变化.河流生态系统中氮负荷增加,使河流达到氮饱和状态,并最终改变溪流系统硝化和反硝化等氮的生物地球化学循环过程.随着nO3-浓度的增加,五川源头溪流已成为流域内重要的nO3-源.NO3-concentrations sampled monthly in the Wuchuan stream,which is a small agricultural headwater stream in the southeast of China,within two years,were used to study the stream′s nitrogen saturation characteristics.Results showed that NO3-concentrations varied from 35.5 to 319.5 μeqL-1 in 2005 and from 5.0 to 353.6 μeqL-1 in 2007.And,according to the criteria proposed by Stoddard and Traaen,the nitrogen saturation status of the stream was at stage 2 or 3,and stage 2,respectively.Both stages were closed to saturation.It was found that the saturation stage would increase with the NO3-concentration,which caused the change of nitrogen saturation stage in the Wuchuan stream over time.The increasing of nitrogen loadings has led to the stream nitrogen saturation and eventually can alter nitrification,denitrification and other nitrogen biogeochemical cycles in the stream ecosystem.国家自然科学基金资助项目(41175130);教育部新世纪优秀人才支持计
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