HIV－1反式激活因子（Tat）作用机理的研究进展

ＨＩＶ－１反式激活因子（Ｔａｔ）作用机理的研究进展梁臣,耿运琪（南开大学生命科学学院,天津３０００７１）关键词ＨＩＶ－１,Ｔａｔ,ＴＡＲ人免疫缺陷病毒－１（ＨＩＶ－１）属反转录病毒科,慢病毒亚科,为艾滋病的重要病原体。该病毒可长期潜伏于人体内,但在某...     

从HIV－Ⅰ中新发现编码含硒蛋白的基因探讨艾滋病化疗新方法

从ＨＩＶ－Ⅰ中新发现编码含硒蛋白的基因探讨艾滋病化疗新方法刘琼,徐辉碧（华中理工大学化学系,武汉４３００７４）关键词　艾滋病,人类免疫缺陷病毒Ⅰ型,硒艾滋病是一种目前尚无有效防治方法的疾病。它是由人类免疫缺陷病毒（ＨＩＶ）感染,并在宿主细胞内大量复制...     

反式激活HIV—1LTR的人疱疹病毒6型（HHV—6）基因片段的初步研究

艾滋病（ＡＩＤＳ）主要是由人免疫缺陷病毒（ＨＩＶ）侵入人体后,破坏人的免疫系统造成的。许多流行病学研究已证明,疱疹病毒与ＨＩＶ的共感染可以导致对ＨＩＶ－１启动子的激活,并加速细胞的病理性反应〔１〕,从而加大个体对ＨＩＶ感染的敏感和加快疾病的进程。人疱...     

人免疫缺陷病毒HIV-1 gag和env基因片段在大肠杆菌中的表达

人免疫缺陷病毒ＨＩＶ－１ｇａｇ和ｅｎｖ基因片段在大肠杆菌中的表达祁自柏,谷金莲,李河民（中国药品生物制品检定所,北京１０００５０）由于引起艾滋病的ＨＩＶ－１病毒的多变性,使得艾滋病的预防和治疗遇到很大困难。我们从一株用艾滋病人外周血淋巴细胞感染的细胞...     

广东两株人免疫缺陷病毒的分离和鉴定

从我省两名经性途径感染艾滋病的病人中采血,分离外周血单核细胞（ＰＢＭＣｓ）,将其与正常人ＰＢＭＣｓ共培养分离人免疫缺陷病毒（ＨＩＶ）,３周后检测上清ＨＩＶ－１ｐ２４抗原（ＥＬＩＳＡ法）超过阈值。将共培养第四周细胞和上清分别感染Ｈ９细胞（Ｔ细胞淋巴瘤传代细胞）,一周后检测ＨＩＶ－１ ｐ２４怕,证明有病毒生长。用ＨＩＶ－１ ＥＮＶ基因引物的套式聚合酶链反应（Ｎｅｓｔｅｄ ＰＣＲ）证实,两株新分离的病毒     

HIV－1感染初始阶段的分子机制

ＨＩＶ－１感染初始阶段的分子机制项秉懿（第四军医大学分子生物学研究所,西安７１００３２）关键词艾滋病,人类免疫缺陷病毒－Ｉ型,包膜糖蛋白ｇｐ１２０,ＣＤ４受体,感染ＴｈｅＭｏｌｅｃｕｌａｒＭｅｃｈａｎｉｓｍｏｆＨＩＶ－１ＩｎｆｅｃｔｉｏｎｉｎｔｈｅＩ...     

人类免疫缺陷病毒细胞辅助受体的研究进展

人类免疫缺陷病毒细胞辅助受体的研究进展谭伟赵翠萍综述李德富审校（中国药品生物制品检定所,北京１０００５０）分类号Ｒ５１１前言人类免疫缺陷病毒（Ｈｕｍａｎｉｍｍｕｎｏｄｅｆｉｃｉｅｎｃｙｖｉｒｕｓ,ＨＩＶ）可以在人类引起艾滋病（ＡＩＤＳ）。经过十几年的...     

人类免疫缺陷病毒Ⅱ型跨膜蛋白在大肠杆菌中的表达

人类免疫缺陷病毒Ⅱ型（ＨＩＶ－２）的跨膜蛋白ｇｐ３６,是从外膜蛋白前体中裂解的,它在诱导病毒与细胞膜的融合和合胞体的形成中起着重要的作用〔１〕。感染ＨＩＶ－１或ＨＩＶ－２的患者,可产生针对病毒结构蛋白（包括包膜表面糖蛋白和跨膜蛋白）的体液免疫〔２－４...     

人类艾滋病动物模型的研究现状

人类艾滋病动物模型的研究现状黄海贲昆龙郑永唐（中国科学院昆明动物研究所６５０２２３）关键词艾滋病,人类免疫缺陷病毒,动物模型ＫｅｙｗｏｒｄｓＡＩＤＳ,ＨＩＶ,Ａｎｉｍａｌｍｏｄｅｌ动物模型是研究许多疾病不可缺少的工具。在人类与２０世纪的头号病魔——艾...     

人类免疫缺陷病毒包膜糖蛋白gp41核心结构的药物研究

人类免疫缺陷病毒（ＨＩＶ）包膜糖蛋白ｇｐ４１在病毒膜和靶细胞膜的融合过程中发挥重要作用。本文叙述了Ｃ多肽抑制剂研究成果、ＨＩＶｇｐ４１核心结构的特征及作用于ｇｐ４１核心结构的抗ＨＩＶ药物研究的最新发展。可望在不久的将来,研制出针对ＨＩＶｇｐ４１核心结构的新的抗病毒药物用于治疗和预防ＨＩＶ－１感染和ＡＩＤＳ。     

Recent advances in the study of Kaposi's sarcoma-associated herpesvirus replication and pathogenesis

It has now been over twenty years since a novel herpesviral genome was identified in Kaposi's sarcoma biopsies. Since then, the cumulative research effort by molecular biologists, virologists, clinicians, and epidemiologists alike has led to the extensive characterization of this tumor virus, Kaposi's sarcoma-associated herpesvirus(KSHV; also known as human herpesvirus 8(HHV-8)), and its associated diseases. Here we review the current knowledge of KSHV biology and pathogenesis, with a particular emphasis on new and exciting advances in the field of epigenetics. We also discuss the development and practicality of various cell culture and animal model systems to study KSHV replication and pathogenesis.     

The structure, reproduction and taxonomy of Vidalia and Osmundaria (Rhodophyta, Rhodomelaceae)

Comprises species occurring mostly in subtidal habitats in tropical, subtropical and warm-temperate areas of the world. An analysis of the type species, V. spiralis (Sonder) Lamouroux ex J. Agardh, a species from Australia, establishes basic characters for distinguishing species in the genus. These characters are (1) branching patterns of thalli, (2) flat blades that may be spiralled on their axis, (3) width of the blade, (4) primary or secondary derivation of sterile and fertile branchlets and (5) position of sterile and fertile branchlets on the thalli. Application of the latter two characters provides an important basic method for separation of species into three major groups. Osmundaria , a genus known only in southern Australia, was studied in relation to Vidalia , and its separation from the Vidalia assemblage is not accepted. Species of Vidalia therefore are transferred to the older genus name, Osmundaria. Two new species, Osmundaria papenfussii and Osmundaria oliveae are described from Natal. Confusion in the usage of the epithet, Vidalia fimbriala Brown ex Turner has been clarified, and Vidalia gregaria Falkenberg, described as an epiphyte on Osmundaria pro/ifera Lamouroux, is revealed to be young branches of the host, Osmundaria prolifera.     

New or rare chromosome counts in Artemisia L. (Asteraceae, Anthemideae) and related genera from Kazakhstan

Fifteen chromosome counts of six Artemisia taxa and one species of each of the genera Brachanthemum, Hippolytia, Kaschgaria, Lepidolopsis and Turaniphytum are reported from Kazakhstan. Three of them are new reports, two are not consistent with previous counts and the remainder are confirmations of very scarce (one to four) earlier records. All the populations studied have the same basic chromosome number, x = 9, with ploidy levels ranging from 2x to 6x. Some correlations between ploidy level, morphological characters and distribution are noted.     

肝癌中HBV和HCV基因和抗原的分布及意义

采用原位分子杂交方法检测HCV RNA及HBV X基因;采用免疫组织化学方法研究HCV核心抗原,非结构区C33c抗原及HBxAg在肝细胞肝癌中的定位及分布.结果表明(1)HCV RNA、HBV X基因在肝细胞肝癌组织检出率分别为40%(55/136)和82%(112/136).HCV RNA定位于癌细胞的胞浆内,阳性细胞呈散在、灶状及弥漫分布三种形式;HBV X基因在肝癌细胞中的分布呈胞浆型、核型及核浆型,阳性细胞也呈上述三种分布形式;(2)HCV C33c抗原、核心抗原在肝细胞肝癌中的阳性率为81%(133/164)及86%(141/164).C33c抗原定位于癌细胞及肝细胞的胞浆内;核心抗原既定位于癌细胞核中,又可定位于胞浆中.C33c抗原阳性细胞以灶状分布为主;而核心抗原阳性细     

Selection with two alleles and complete dominance

For a plant selection model with frequency-independent viabilities, fertilities and selfing rates, it is shown that apart from global fixation, for certain parameter combinations a protected polymorphism and facultative fixation (either allele may become fixed according to initial frequencies) may both occur. Facultative fixation requires different selling rates for the dominant and recessive type. Protection of the polymorphism requires resource allocation for male and female function. In this connection the problem of purely genetically caused population extinction is discussed.
For general frequency dependence and regular segregation, the chances for establishment of a completely recessive gene are compared to those of a completely dominant gene. It is proven that the process of establishment of the recessive gene, despite a fitness advantage, may be considerably endangered by drift effects if random mating prevails. The recessive gene may reach the same effectivity in establishment as a dominant gene, only if the recessive homozygote mates exclusively with its own type during the period of establishment.