基于用户行为的Non-self集的构造方法

通过对计算机免疫系统及入侵检测方法的探讨,提出了一种基于用户行为的非我(Non-self)集的构造和演化方法,采用数据挖掘的思想并提出了相应的算法,本系统可以发现入侵并可实时地通知用户入侵的类型及种类.     

Sperm competition, immunity, selfish genes and cancer

Sperm competition is widespread and has played an important role in shaping male reproductive characters such as testis size and numbers of sperm produced, and this is reflected in the rapid evolution of many reproductive genes. Additionally, sperm competition has been implicated in the rapid evolution of seminal fluids. However, our understanding of the molecular basis of many traits thought to be important in sperm competition is rudimentary. Furthermore, links between sperm competition and a range of issues not directly related to reproduction are only just beginning to be explored. These include associations between sperm competition and selfish genes, immunity and diseases such as cancer.We briefly review these topics and suggest areas we consider worthy of additional research.     

Chitotriosidase: the yin and yang

The enzyme chitotriosidase (ChT), the human analogue of chitinases from non-vertebrate species, is one of the most abundant and indicative proteins secreted by activated macrophages. Its enzymatic activity is elevated in serum of patients suffering from Gaucher’s disease type 1 and in some other inherited lysosomal storage disorders, as well as in diseases in which macrophages are activated. The last decade has witnessed the appearance of a substantial number of studies attempting to unravel its cellular functions, which have yet not been fully defined. A great deal of progress has been made in the study of the physiological roles of ChT. This review is looks at the key areas of investigations addressed to further illuminate whether ChT activation might have different functional meanings in various diseases. Received 7 June 2006; received after revision 24 July 2006; accepted 21 September 2006     

Antigen presentation by CD1 molecules and the generation of lipid-specific T cell immunity

It is now well demonstrated that the repertoire of T cells includes not only cells that recognize specific MHC-presented peptide antigens, but also cells that recognize specific self and foreign lipid antigens. This T cell recognition of lipid antigens is mediated by a family of conserved MHC class I-like cell surface glycoproteins known as CD1 molecules. These are specialized antigen-presenting molecules that directly bind a wide variety of lipids and present them for T cell recognition at the surface of antigen-presenting cells. Distinct populations of T cells exist that recognize CD1-presented lipids of microbial, environmental or self origin, and these T cells participate in immune responses associated with infectious, neoplastic, autoimmune and allergic diseases. Here we review the current knowledge of the biology of the CD1 system, including the structure, biosynthesis and trafficking of CD1 molecules, the structures of defined lipid antigens and the types of functional responses mediated by T cells specific for CD1-presented lipids.     

基于免疫技术的计算机防病毒入侵系统的设计与实现

提出了一种基于免疫技术的计算机防病毒入侵系统方案．该系统与传统的杀毒软件相比，最大的不同在于将杀毒软件的被动防御变为免疫系统的主动防御，使病毒与木马无法入侵操作系统，从而保障系统的安全工作．     

Protecting Terminals by Security Domain Mechanism Based on Trusted Computing

0 IntroductionEventhoughsignificant achievement has been madeinre-search of characteristic and abnormal actions of comput-er virus and attack, the investigation of defending the un-known computer virus and attackis progressing much slower .Under the conditions that attackers are much clever , newcomputer virus is presented continuously,the difference be-tween computer virus and normal programis less and lessclear ,detecting computer virus and attack will be more andmore difficult .Andto be the…     

New antimicrobial activity for the catecholamine release-inhibitory peptide from chromogranin A

Catestatin (bCGA_344–364), an endogenous peptide of bovine chromogranin A, was initially characterized for its effect on the inhibition of catecholamine release from chromaffin cells. Catestatin and its active domain (bCGA_344–358) were identified in chromaffin cells and in secretion medium. The present study identified a potent antimicrobial activity of bCGA_344–358 in the lowmicromolar range against bacteria, fungi and yeasts, without showing any haemolytic activity. Confocal laser microscopy demonstrated penetration of the rhodaminated peptide into the cell membranes of fungi and yeasts and its intracellular accumulation. Time-lapse videomicroscopy showed arrest of fungal growth upon penetration of the labelled peptide into a fungal filament. We identified several catestatin-containing fragments in the stimulated secretion medium of human polymorphonuclear neutrophils, suggesting the N-terminal sequence of catestatin (bCGA_344–358) (named cateslytin) as a novel component of innate immunity.Received 21 October 2004; received after revision 6 December 2004; accepted 7 December 2004     

生长激素释放肽GHRP的生物活性研究

以小鼠为实验对象,发现人工合成的GHRP具有明显的增强机体免疫功能的作用,注射了GHRP的小鼠溶血素含量、红细胞免疫功能、腹腔巨噬细胞吞噬指数和巨噬细胞活性(以腹腔巨噬细胞的酸性磷酸酶和精氨酸酶为准)等均高于对照组(包括任选一个六肽HPA的系统对照);注射了GHRP的小鼠血液中SOD酶活性明显升高,而血清中丙二醛MDA含量呈下降趋势,说明其具有一定的抗氧化作用.     

子宫内膜异位症临床病理特点及发病机制探讨

目的:分析子宫内膜异位症的临床病理特点及探讨子宫内膜异位症的病因及发病机制.方法:根据病变部位的不同,将子宫内膜异位症分为:(1)内在性子宫内膜异位症;(2)外在性子宫内膜异位症;(3)混合性子宫内膜异位症.应用免疫组织化学S-P法,对112例子宫内膜异位症在位及异位内膜组织进行雌、孕激素受体的测定.结果:子宫内膜异位症的临床特点为慢性盆腔疼痛、痛经和不孕;连续切片证实内在性子宫内膜异位症来源于内膜基底层的腺体和间质.雌激素受体(ER)在在位及异位内膜组织中的阳性率分别为89%(39/44)和80%(45/56);孕激素受体(PR)在在位和异位内膜的阳性率分别为77%(34/44)和86%(48/56);两者均无统计学差异(P>0.05).结论:子宫内膜异位症是由多种原因引起的一种良性病变,但也具有种植、转移等肿瘤组织的特点.内在性子宫内膜异位症来源于内膜基底层的腺体和间质.ER、PR在异位症的在位及异位内膜组织中均有较高的阳性表达,表明其直接或间接地参与了子宫内膜异位症的发病过程,对其发生和发展起重要作用.     

表达结核杆菌抗原的重组酿酒酵母免疫小鼠研究

近年来研究显示全细胞重组酿酒酵母疫苗具有治疗性疫苗潜能.为了研究重组酿酒酵母结核病候选疫苗的免疫效果,将IFN-γ基因与结核杆菌抗原蛋白Ag85B、ESAT6的基因融合,利用pHR酿酒酵母表达系统和同源重组方法,成功构建了以酿酒酵母Y16为宿主的表达融合蛋白IF-γ-Ag85B和IF-γ-ESAT6-Ag85B的重组酿...