两组浓度的蛋白酶体抑制剂MG132诱导人宫颈癌细胞Hela凋亡

为了探讨不同浓度蛋白酶体抑制剂MG132在诱导人宫颈癌Hela细胞凋亡过程中作用,分别以两组浓度的蛋白酶体抑制剂MG132处理人宫颈癌细胞Hela,通过MTT法检测Hela细胞活力,应用AnnexinⅤ和PI双染的细胞流式法检测Hela细胞凋亡率,应用Western blotting和酶标仪法检测Hela细胞内Caspase-3活性变化的情况.结果表明:低浓度MG132诱导Hela细胞凋亡不明显,高浓度MG132诱导Hela细胞凋亡明显;不同浓度蛋白酶体抑制剂MG132诱导人宫颈癌Hela细胞凋亡的程度存在明显差异.     

猪树突状细胞的体外扩增

树突状细胞(DC)是一类专职的抗原提呈细胞,在激发机体初始免疫反应和调节T细胞介导的免疫反应中都发挥十分重要的作用,但至今对猪DC的了解较少.本研究从猪外周血中分离获得单核细胞,分别加入150ng/mLpGM-CSF和100U/mL pIL-4,体外培养6 d后诱导出大量DC,通过显微镜观察可见其细胞表面具有典型的树突状突起,呈毛刺状.猪DC的体外获得将为进一步研究许多病毒性疾病的致病机理奠定坚实的基础.     

微生物燃料电池在污水处理方面的应用研究进展

近年来微生物燃料电池技术在国外接连取得突破性研究成果, 并迅速成为新概念废水处理的热点.介绍了微生物燃料电池技术的原理和特点, 系统综述了该项技术的研究进展, 重点总结了在微生物、介体与电极材料研究等方面的最新研究进展, 分析了存在的问题, 在此基础上指出微生物燃料电池技术研究的重点突破方向.     

金属离子的反相微胶团萃取研究

研究了用正己烷－环己醇、异辛烷－正己醇作萃取溶剂,铬天青Ｓ作萃取剂,加入Ｎ－氯代十六烷基吡啶、十六烷基三甲基溴化铵等阳离子表面活性剂,在ＨＮＯ３和ＨＣｌ介质中Ｆｅ（Ⅱ）,Ｌａ（Ⅱ）,Ｃｕ（Ⅱ）和Ｐｄ（Ⅱ）等金属离子的反相微胶团萃取行为。讨论了不同浓度的电解质溶液和酸溶液对有机相中金属离子进行反萃取的影响,实现了Ｆｅ（Ⅲ）－Ｃｕ（Ⅱ）,Ｌａ（Ⅲ）－Ｃｕ（Ⅱ）等金属离子间的定量萃取分离。     

光质对玫瑰茄悬浮细胞合成花青素的影响

玫瑰茄县浮细胞合成花青素受光调节,将不同的单色滤光膜覆盖在摇瓶表面,探讨光照强度,判定了蓝光（波长４２０￣５３０ｎｍ）是促进玫瑰茄细胞产花青素的最有效单色光,花青系产量为４１６ｍｇ／ｌ,和全色光下相当（３９６ｍｇ／ｌ）;红光笔橙光（波长〉５８０ｎｍ）无 效;其它单色光承其波长接近蓝光,正效应增强,单色光对玫瑰茄细胞培养过程的其它参数,如ｐＨ值、降糖速度、细胞生物量等影响不大。     

Recombinant sTRAIL induces cell death of tumor cell lines as well as primary cancer cells

Tumor necrosis factor (TNF)-related apoptosis-inducing ligand (TRAIL) is a new member of TNF family. It was reported that TRAIL could induce apoptosis of tumor cells but not normal cells in tissue culture system. To further study the biological activity and potential clinical significance, a recombinant soluble TRAIL (rsTRAIL) has been expressed stably in E. coli after transformation of pET28b vector containing the extracellular domain of TRAIL. The yield of rsTRAIL is approximately as high as 60% of whole bacterial proteins. The rsTRAIL, purified by Ni+ -agarose affinity chromatography, could remarkably trigger apoptosis at the concentrations of 0.1-1 μg/mL in all 7 tumor cell lines tested in vitro. However, this killing activity has not been observed in mouse fibroblast cell line (NIH3T3) as normal control. Further investigation shows that the rsTRAIL could also kill primary tumor cells isolated freshly from patients with cardiac cancer, breast cancer and malignant thymoma, while the normal human peripheral blood lymphocytes are not killed under the same conditions. These results provide new evidence that rsTRAIL could induce apoptosis of tumor cells specifically and it could be a new promising medicine for tumor therapy.     

Effect of MTECl on the functional expression of TCRαβ~ + 3G11~- 6C10~-CD4~+CD8~- thymocyte subset

A murine CD4+ thymocyte subset with phenotype of TCRαβ + 3G11- 6C10- CD4 + CD8- CD69 +/- HSAmed/locontains the cells in relatively functional matured status. The functional property of the cells in this subset is characterized by the unique pattern of cytokine production at transitional stage from Th0 to Th2 type with the latter being the dominant type. After being co-cultured with murine thymic medullary epithelial cell line (MTEC1) cells, a murine thymic medullary type epithelial cell line, the TCRαβ(T 3G11 6C10-CD4 + CD8- CD69+/- HSAmed/l? thy-mocytes, has exhibited significantly higher levels of proliferation capability and IL-6 production, whereas the production of IL-4 and IL-10 is suppressed after co-culturing with MTECl. By contrast, MTECl could not induce thymocytes to secrete Th1 type of cytokines. The results suggest that MTECl can regulate functional status of this thymocyte subset and induce them to develop into a specialized Th2 subset.     

论新型商业混同行为的法律规制--对我国《反不正当竞争法》修改的一点建议

我国<反不正当竞争法>规定了三种商业混同行为.商业混同行为是现实中最常见的不正当竞争行为,其危害极大.然而新类型的商业混同行为,如不正当模仿行为、反向假冒商标行为以及商标与企业名称的混同行为等却因为法无明文规定而得不到有力的规制.建议修改<反不正当竞争法>,增加新类型的商业混同行为的规定,以完善竞争立法.     

快速成型中的三维数据准备

快速成型中的三维数据包括物体的三维CAD模型、通过三维数字化测量仪器测得的物体表面的三维数据点云、STL文件及三维模型的切片. 通过概念设计和反求工程中的三维扫描可以建立物体的三维CAD模型, 并着重讨论了工件表面点三维数据的获取方法及数据点云的处理, STL文件的格式、精度、分割与拼接.     

红细胞保存期对冻干前海藻糖负载量的影响研究

探讨冻干前红细胞保存期对海藻糖负载量的影响,确定红细胞负载海藻糖的最佳条件。在37℃条件下,4℃保存0、24、48和72 h的红细胞在海藻糖浓度800 mmol/L的负载缓冲液中孵育7 h后,检测胞内海藻糖浓度和胞外外游离血红蛋白浓度。经相同条件孵育后,4组红细胞对海藻糖的摄取量基本相同,分别为(49.747±2.253)、(50.316±0.612)、(49.768±2.179)和(49.013±1.991)mmol/L,各组之间无统计学差异。4℃保存24、48和72 h的红细胞相对于新鲜红细胞,3组负载红细胞胞外游离血红蛋白明显增加,分别高达(8.473±2.138)g/L(P0.05)、(12.697±1.787)g/L(P0.01)和(14.036±2.796)g/L(P0.01)。说明冻干前红细胞4℃保存期不会影响海藻糖负载量,红细胞负载海藻糖的主要影响因素仍为负载温度、负载时间和负载缓冲液中海藻糖浓度,若固定孵育条件,红细胞对海藻糖的胞内负载量基本保持不变。但随保存期的延长,红细胞在高渗环境中孵育更易损伤,溶血率明显增加。所以,为达到更好的海藻糖负载效果,应尽量采用新鲜红细胞进行处理。