单价流感疫苗脂质体干粉细胞免疫研究

从细胞免疫水平考察流感疫苗脂质体干粉肺部免疫的免疫原性,以验证在稳定性提高的同时,流感疫苗脂质体干粉肺部免疫原性不低于现行应用的流感疫苗原液腹腔注射免疫。将实验小鼠分为2个大组,每组分为阴性对照组、疫苗脂质体冻干粉组、非脂质体流感疫苗原液组和阳性对照组(n=5)。非脂质体流感疫苗原液组和疫苗脂质体冻干粉组分别以每只6μg血凝素(以H1N1计)肺部灌注免疫,同时以每只6μg非脂质体流感疫苗原液组腹腔免疫作为阳性对照。分别免疫14 d和28 d后,用四甲基偶氮唑盐微量酶反应比色法(MTT法)检测脾淋巴细胞增殖情况,以考察其细胞免疫原性。脂质体肺部免疫可以诱导细胞免疫,且其免疫原性明显高于流感疫苗原液传统腹腔注射免疫组。与流感疫苗原液腹腔注射免疫相比,流感疫苗脂质体干粉通过肺部免疫,细胞免疫效果明显提高。     

Empirical study on entropy models of cellular manufacturing systems

From the theoretical point of view,the states of manufacturing resources can be monitored and assessed through the amount of information needed to describe their technological structure and operational state.The amount of information needed to describe cellular manufacturing systems is investigated by two measures:the structural entropy and the operational entropy.Based on the Shannon entropy,the models of the structural entropy and the operational entropy of cellular manufacturing systems are developed,and the cognizance of the states of manufacturing resources is also illustrated.Scheduling is introduced to measure the entropy models of cellular manufacturing systems,and the feasible concepts of maximum schedule horizon and schedule adherence are advanced to quantitatively evaluate the effectiveness of schedules.Finally,an example is used to demonstrate the validity of the proposed methodology.     

纳米技术在抗肿瘤药物靶向递释系统中的应用研究进展

 纳米载药技术已经在抗肿瘤药物递送领域受到广泛关注。纳米技术可以显著增加难溶性药物的生物利用度,改善药物释放与摄取行为,提高药物对肿瘤组织的靶向性,增加药物在肿瘤组织的分布与蓄积,降低药物对正常组织和细胞毒副作用,实现减毒增效。尽管如此,如何有效克服肿瘤生理屏障,进一步提高化疗药物的肿瘤特异性,实现肿瘤组织深度渗透和肿瘤细胞内可控释药仍然是开发抗肿瘤纳米药物亟需解决的重大挑战。从被动靶向、物理靶向、主动靶向和仿生靶向4个方面概述了纳米载药系统抗肿瘤药物在克服肿瘤屏障实现肿瘤靶向药物递送方面的研究进展。     

提高大学生免疫力运动处方的探讨

结合大学生生理心理特点，提出了制定提高大学生免疫力的运动处方原则，探讨了处方中的运动强度、运动时间、运动频率和运动项目的选择。     

中草药"禽促免"液对雏鸡的免疫作用

研究了在母源抗体水平相同的条件下饮服“禽促免”液Ａ方和Ｂ方，然后分别６次颈静脉采血，测定其ＨＩ抗体水平。结果表明：在检测期内的抗体水平，Ａ方试验组与对照组比较，差异均显著，Ｂ广度一与对照组比较，并异不显著。抗体峰值期，Ａ主试验组，显著高于Ｂ方试验组，在不同时期的检测，均可说明中药方剂“禽促免”液具有提高抗体滴度，延长抗体持续时间的作用。     

铁路行包运输交付系统初始化设计

铁路行包运输交付系统初始化子系统由路径表初始化,系统标题表初始化,操作行李员表初始化,初始参数设定和计算参数设定等模块构成.铁路行包运输交付系统的初始化设计,主要解决系统在铁路各等级车站使用中作业流程、业务管理的差异问题.本文讨论了该系统中初始化模块的设计思想与实现手段.     

老年急性冠脉综合征患者的细胞免疫功能变化

目的:通过检测老年急性冠脉综合征(ACS)病人血清中的细胞因子γ-干扰素(IFN-γ),免疫细胞表面抗原分子CD3~+、CD4~+、CD8~+的浓度水平,探讨老年ACS病人的细胞免疫功能改变.方法:36例ACS患者为实验组,40例正常对照组老年人的外周静脉血,酶联免疫吸附法(ELISA)测定IFN-γ含量,采用碱性磷酸酶-抗碱性磷酸酶桥联酶染色法(APAAP)测定T淋巴细胞亚群细胞数.结果:实验组IFN-γ含量和CD3~+、CD4~+、CD4~+/CD8~+比值低于对照组(P=0.001),而CD8~+则高于对照组(P=O.001),差异均有显著性意义.结论:老年ACS患者体内细胞免疫功能的改变可能对ACS的形成和发展产生了一定的影响,T淋巴细胞亚群比值和IFN-γ含量变化可作为老年ACS严重程度的监测指标.     

仙芦抗癌胶囊对红细胞免疫及唾液酸的影响

为了观察仙芦抗癌胶囊抗肿瘤作用机制,采用红细胞免疫黏附方法观察红细胞免疫功能,采用比色法观察红细胞膜唾液酸含量,结果表明仙芦抗癌胶囊能够升高S180荷瘤小鼠H22荷瘤小鼠红细胞免疫黏附肿瘤细胞的花环率,升高S180荷瘤小鼠和H22荷瘤小鼠红细胞膜表面唾液酸含量,因此仙芦抗癌胶囊通过升高荷瘤小鼠红细胞膜表面唾液酸含量,从而恢复荷瘤小鼠红细胞免疫功能进而达到抗肿瘤作用。     

德国图书馆文献传递服务研究

文献传递服务能够很好地解决非本地电子的或传统的文献资源的利用.对德国图书馆的文献传递服务系统、合作团体、传递方式和收费体系等进行了研究,以指导我国图书馆文献传递服务工作的开展.     

Intracellular siRNA delivery with novel spermine based surfactants

The design and development of safe and effective multifunctional siRNA delivery systems are critical for clinical application of RNAi therapeutics. Here we evaluated eight new spermine-based surfactant multifunctional carriers for siRNA delivery. These carriers complexed with siRNA forming stable compact nanoparticles with sizes around 100 nm. The multifunctional carriers mediated higher intracellular siRNA transfection than Lipofectamine-2000. The siRNA nanoparticles of the multifunctional carriers exhibited low cytotoxicity as shown by MTT assay. Three of the eight multifunctional carriers showed higher silencing efficiency than Lipofectamine-2000 in both U87-Luc cells and CHO-GFP cells. SKAHCO showed the highest siRNA delivery efficiency among the carriers. It resulted in 84.6±5.5% silencing of luciferase activity in U87-Luc cells, much higher than that (62.8± 3.4%) from Lipofectamine-2000. In conclusion, the spermine based multifunctional carriers are promising for highly efficient intracellular siRNA delivery.     

Multifunctional to multistage delivery systems: The evolution of nanoparticles for biomedical applications

Nanomaterials are advancing in several directions with significant progress being achieved with respect to their synthesis, functionalization and biomedical application. In this review, we will describe several classes of prototypical nanocarriers, such as liposomes, silicon particles, and gold nanoshells, in terms of their individual function as well as their synergistic use. Active and passive targeting, photothermal ablation, and drug controlled release constitute some of the crucial functions identified to achieve a medical purpose. Current limitations in targeting, slow clearance, and systemic as well as local toxicity are addressed in reference to the recent studies that attempted to comprehend and solve these issues. The demand for a more sophisticated understanding of the impact of nanomaterials on the body and of their potential immune response underlies this discussion. Combined components are then discussed in the setting of multifunctional nanocarriers, a class of drug delivery systems we envisioned, proposed, and evolved in the last 5 years. In particular, our third generation of nanocarriers, the multistage vectors, usher in the new field of nanomedicine by combining several components onto multifunctional nanocarriers characterized by emerging properties and able to achieve synergistic effects.     

细胞神经网络的研究进展

本文综述了细胞神经网络的理论、硬件实现、软件系统以及一些应用。     

表面活性剂在药物制剂中的应用及其与药物分子之间的相互作用

近年来,表面活性剂及其缔合体系在药物载体方面得到了广泛的应用,药物载体中表面活性剂分子与药物分子之间的相互作用更受到人们的关注．本文介绍了表面活性剂应用于药物载体中引起的药物分子的溶解度、稳定性、生物活性、渗透能力等的变化,总结了药物载体中表面活性剂与药物分子之间相互作用,及其所引起的体系物理化学性质（如缔合体系相转变、表面活性剂溶液临界胶束浓度,以及溶液浊点等）的变化．这些性质的变化,对表面活性剂缔合体系作为药物载体具有重要的指导作用．     

DNA纳米机器药物递送研究进展

 天然分子机器是细胞正常功能（包括DNA复制、细胞内物质运输、离子平衡和细胞运动等）的重要执行者。受天然分子机器的启发,人工分子机器的概念被提出并逐步实践。DNA分子独特的理化性质使得其可作为自组装基元用于构建分子机器类纳米结构。DNA纳米结构具有形状可设计性、精确的可寻址性、结构动态响应性及良好的生物相容性,可以作为一种良好的药物递送载体材料。通过可寻址的负载特定功能元件从而构建DNA纳米载体和治疗型DNA纳米机器,可以靶向性地将药物传递到病变组织和细胞,响应性地释放药物,提高药物的细胞摄取率并降低其毒副作用,有望成为优秀的药物递送系统。基于DNA纳米结构的药物载体已经被用于递送小分子药物、寡核苷酸类药物和蛋白药物。以每类药物分子中的典型药物为例,介绍了DNA纳米载体和DNA纳米机器药物递送系统的研究进展,并讨论了其所面临的挑战及可能的发展趋势。     

口服8种细菌溶解物治疗儿童反复呼吸道感染免疫指标的变化

目的观察8种细菌溶解物（泛福舒）治疗反复呼吸道感染前后免疫指标的变化。方法将117例反复呼吸道感染儿童121服泛福舒，每日1次，每次3．5mg，连用10d，停20d，3月为疗程。结果治疗前后免疫指标改变有显著性差异（P〈0．01）。结论口服泛福舒可提高儿童体液免疫和细胞免疫，可作为治疗儿童反复呼吸道感染的有效方法。     

肿瘤免疫监视非线性模型及相关变量

在对肿瘤免疫监视抗癌动力系统模型深入研究基础上,提出由单变量、二变量和多变量下相关系统的稳定性结论及生物学意义,并用MATLAB的数值分岔插件MATCONT绘制出数值分岔图.     

Novel PLGGE graft polymeric micelles for doxorubicin delivery

Novel poly{(lactic acid)-co-[(glycolic acid)-alt-(L-glutamic acid)]}-g-monomethyl poly(ethylene glycol) (PLGGE) micelles were prepared and used as carriers for anti-tumor drug delivery. Three PEGylated PLGG copolymers (PLGGE2000, PLGGE1100 and PLGGE500) were characterized by XRD, TG and DSC. The critical micelle concentrations (CMCs) of the amphiphilic copolymers were 1.04, 0.55 and 0.13 μg/mL, respectively. The TEM, AFM and DLS measurements revealed that the micelles were homogeneous spherical nanoparticles with the diameters ranged from 50 to 150 nm when THF was used as solvent in the preparation of the micelles. Interestingly, extended cylindrical micelles were obtained using CHCl 3 as solvent. The micelles could trap doxorubicin (DOX) in the core with the highest drug loading content up to 23.7%. The mean diameter of drug loaded micelles was much bigger than that of blank micelles. The in vitro drug release of the micelles was diffusion-controlled release within the first 36 h and initial burst release was not obvious. However, after 36 h, the release rate in pH 5.0 was faster than that in pH 7.4 due to the degradation. The PLGGE micelles were nontoxic to both NIH 3T3 fibroblasts and HepG2 cells. The in vitro cytotoxicity against HepG2 cells demonstrated that the drug loaded micelles exhibited high inhibition activity to cancer cells. CLSM observation of HepG2 cells showed that DOX released from the micelles could be delivered into cell cytoplasm and cell nuclei. PLGGE micelles are potential promising carriers for anti-tumor drug delivery.     

HPV16E7-HSP70 Hybrid DNA Vaccine Induces E7-Specific Cytotoxic T Cells and Antitumor Immunity

0 IntroductionInbroicguhltat einxpge cDtaNtiAonvafcocri nper eivse ant ninegw aanpdp cruoraicnhg wdiits-heases . Due to the comparative weakness of cellulari mmunity that is purely induced by E7 DNA vac-cine,research on DNA vaccine is now focused onhowto enhance the i mmunogenicity of DNA vac-cine.It has been found in some research that thestrength of cellular i mmunity activity has things todo with the speed of antigen molecules’degrada-tion,i .e.the faster the degradation,the higher th…     

植入器件经皮能量传递模型分析

通过电磁场有限元分析软件FEMlab3.3建立了体导电能量传递模型,设计了3种不同形状的电极以优化电极皮肤接触阻抗来提高充电电流传递效率,所采用的Ag电极具有稳定的电极电解质界面,成本低,可重复使用。通过在体外电极上施加不同等级电压以得到最终结果。根据仿真结果,在保证人体安全电流情况下,体导电电流传递效率可达20%以上,能量传递效率在4%~9%之间,不仅远大于无铁芯电磁感应能量传递效率,而且可以进一步实现体内电池体积小型化。     

Glycyrrhetinic acid-modified nanoparticles for drug delivery: Preparation and characterization

In this work, glycyrrhetinic acid-modified chitosan （mGA-suc-CTS） used as liver targeted carrier for drug delivery, was prepared via hemisuccinate as a bridged group. The structure of the product was confirmed by IR and NMR methods and the degree of substitution （DS） of glycyrrhetinic acid groups was estimated via elemental analysis. Nanoparticles were formed by ionic gelation methold. The drug-loading and release behavior of the nanoparticles were investigated using BSA as the model drug. The results indicated that the carrier with a highest DS of 5.19% could be got and the DS was controlled by changing reaction temperature or feed ratio. BSA could be entrapped into the nanoparticles with the drug-loading ratio of 26.3% and the encapsulation efficiency of 81.5%. A sustained release over an 11-day period was observed in pH 7.4 in vitro.