红毛藻多糖对环磷酰胺诱导的免疫抑制小鼠的免疫调节机理

本研究以环磷酰胺（cyclophosphamide,CTX）诱导的免疫力低下小鼠为模型,探究红毛藻多糖（Bangia fusco-purpurea polysaccharides,BFP）对免疫抑制小鼠免疫力的影响。结果表明,BFP干预能够显著提高免疫抑制小鼠自然杀伤细胞活性、巨噬细胞吞噬能力和清除碳颗粒能力;增强T淋巴细胞增殖作用,上调CD4＋ T细胞比例,降低CD8＋ T细胞比例并增加CD4＋/CD8＋,降低辅助性T细胞17和CD3－CD19＋ B细胞的比例;提高血清溶血素、免疫球蛋白（immunoglobulin,Ig）A和IgG、免疫相关细胞因子白细胞介素（interleukin,IL）-2、IL-6、肿瘤坏死因子-α（tumor necrosis factor-α,TNF-α）、干扰素-γ（interferon-γ,INF-γ）的质量浓度,对免疫抑制小鼠的非特异性免疫、细胞免疫及体液免疫均具有良好的调节作用。在明确BFP对免疫抑制小鼠免疫功能具有保护作用的基础上,分析其对免疫抑制小鼠肠道相关免疫细胞表面受体的影响,发现BFP能够显著或极显著下调Toll样受体（Toll-like receptor,TLR）2、TLR4、IL-6和TNF-α基因（P＜0.05）和蛋白（P＜0.01）的表达,推测BFP通过TLR2/TLR4下游相关信号通路调节轴发挥增强免疫力的功能。本研究可为深入认识海洋食品的营养价值,推进海洋食品在居民膳食中的应用提供科学依据。     

酵母培养物与抗生素对蛋雏鸡生长性能和免疫机能的影响

试验采用1日龄海兰褐蛋用雏鸡400只,随机分成5个组(Ⅰ~Ⅴ组),每个组设4个重复,每个重复20只鸡。Ⅰ组为对照组,饲喂基础日粮;Ⅱ~Ⅴ组为试验组,其中Ⅱ~Ⅳ组在基础日粮中分别添加0.1%、0.3%和0.5%的酵母培养物,Ⅴ组添加抗生素,试验期5周。结果表明,在蛋雏鸡日粮中添加0.3%的酵母培养物具有增强雏鸡生产性能和免疫机能的作用,且酵母培养物可以替代抗生素。     

丁酸的生理功能研究进展

丁酸是一种重要的短链脂肪酸,是结肠细胞重要的能量来源,可控制细胞增殖,具有多种生理功能。近年来大量研究表明,丁酸有促进肠道发育、维持肠道功能与健康、增强机体免疫性能、抗肿瘤、抗氧化等功能,但目前对于丁酸生理功能的研究多停留在利用动物模型或细胞进行单独研究的阶段。本文从肠道组织功能与健康、物质代谢、免疫功能、肿瘤细胞等几个方面综述了丁酸功能的研究进展,并进行了展望,旨在为丁酸的进一步研究与应用提供思路。     

Automating procedures for processing, cryopreservation, storage, and manipulation of human peripheral blood mononuclear cells

Cell-mediated immune responses have been found to play a crucial role in the protection from, or amelioration of, many human diseases. There are many vaccine trials being conducted where the most important immune assessment consists of measuring T cell responses. The most readily accessible source of T cells is the peripheral blood. Thus, collection, processing, cryopreservation, storage, and manipulation of human peripheral blood mononuclear cells (PBMCs) are all key steps for assessment of vaccine and disease-induced immune responses. Automation of these procedures is not currently practiced widely. This article reviews current practices and explores the need for automation.     

Almost Boolean Functions: The Design of Boolean Functions by Spectral Inversion

The design of Boolean functions with properties of cryptographic significance is a hard task. In this paper, we adopt an unorthodox approach to the design of such functions. Our search space is the set of functions that possess the required properties. It is "Boolean-ness" that is evolved.     

相关免疫研究的矩阵方法

本文用矩阵和汉明重量相结合的方法给出了相关免疫研究的一种新的赏试。     

He-Ne激光照射巨噬细胞对胞内钙浓度及其免疫活性的影响

用He-Ne激光辐照巨噬细胞，实时观测活体单细胞内钙浓度([Ca^2 ]i)分布和细胞免疫活性随激光功率和照射时间的变化。实验结果表明，随激光照射时间的增加，[Ca^2 ]i出现上升达到最大值后又下降，逐渐回复初始状态，且呈现中心最强，径向衰减的环形梯度分布。不同激光剂量对巨噬细胞内[Ca^2 ]i及其免疫活性有着不同的影响，同一波长激光，当剂量不同时，可以表现为完全相反的效应。同时激光功率也是影响巨噬细胞内[Ca^2 ]i及其免疫活性的一个重要因素，同一波长、同一剂量情况下，如果激光功率不同，巨噬细胞内[Ca^2 ]i及其免疫活性的变化也有着显著的差异。当照射功率为0．16mw时，胞内[Ca^2 ]i峰值是照射功率为0．40mw时的近6倍。最大值时对应细胞免疫活性最高。对其机理作了初步探讨。     

Antiviral Warrior-APOBEC3G

This paper is to further understand how APOBEC3G can defend the retroviruses and to find new approaches to AIDs (acquired immure deficiency syndrome).The viral infectivity factor (Vif) induces rapid degradation of APOBEC3G by ubiquitination, which is a proteosome-dependent pathway. Precisely speaking, only in the virus-producing cell Vif expression is necessary; in its absence, infection of a subsequent target cell terminates at a postentry step through the action of the human APOBEC3G antiviral mechanism. Vif protein has two domains:one binds to APOBEC3G and the other regulates the degradation of APOBEC3G by a conserved sequence, SLQ (Y/F) LA motif. Recently, the research on Vif has also revealed APOBEC3G is a novel component of innate immune system. In fact, APOBEC3G not only acts in DNA editing to block the replication of retroviruses such as HIV-1, but also is able to defend a wide spectrum of distantly related retroviruses and interferes with HBV through a different mechanism from HIV.     

对称布尔函数的扩展代数免疫度

构造具有最优代数免疫度的布尔函数在流密码中有重要作用,基于布尔函数的单变量多项式表示,构造了一类达到最大扩展代数免疫度的布尔函数。以前的一些函数是这类函数的特例。利用对称布尔函数的基本性质,分析了具有最大代数免疫度的对称布尔函数的扩展代数免疫度。得出结论：共有 个达到最大扩展代数免疫度的 （ 是偶数）元对称布尔函数。