免疫调节剂对小鼠实验性单纯疱疹性角膜炎发病的影响

实验组小鼠腹腔分别注射免疫调节剂胸腺五肽(TP5)或环孢霉素(CsA),对照组注射生理盐水(NS),尔后角膜感染单纯疱疹病毒(HSV),造成小鼠实验性单纯疱疹性角膜炎模型。用裂隙灯显微镜观察小鼠角膜上皮、角膜实质、角膜新生血管、结膜和眼睑的病变变化情况。结果:种毒唇4～6天,TP5组角膜上皮和角膜实质病变比NS组严重,差异有显著性,而CsA无此作用。三组小鼠新生血管形成程度差异无显著性。且均在第8天出现高峰。TP5组和CsA组的结膜和眼睑病变,比NS组严重。因此,在临床上,应根据不同病种和不同情况,慎重使用免疫调节剂。     

不同来源潜伏膜蛋白1基因转染对鼻咽癌CNE1细胞生长的影响

目的:探讨不同来源的EB病毒潜伏膜蛋白1(LMP1)基因转染对人高分化鼻咽癌(NPC)细胞系CNE1生长的影响。方法:采用脂质体介导法分别将含有来源于B95-8淋巴细胞标准株的LMP1基因(B95-8-LMP1)和来源于NPC组织的LMP1基因(CAO-LMP1)的质粒转染CNE1;RT-PCR和蛋白印迹法分别鉴定LMP1mRNA和蛋白表达;结晶紫法、流式细胞术和平板克隆形成法测定不同来源的LMP1对CNE1生长特性的影响。结果:成功建立稳定表达不同来源LMP1的CNE1细胞系。两种不同来源的LMP1均可促进CNE1细胞的生长(P<0.01);CAO-LMP1比B95-8-LMP1具有更强促进CNE1生长的作用(P<0.01)。结论:不同来源LMP1对CNE1的体外生长均有促进作用,CAO-LMP1比B95-8-LMP1具有更强的促增殖能力。     

Gene transfer by viral vectors for gene therapy

Conclusions The search for useful virus vectors and for improvements in currently available retrovectors which may have the capability of transportation by natural transport systems in the human body will open effective ways for targeting human genes to specific cells in tissues in situ. Genetic engineering of virus vectors is a subject of prime importance to the developing gene therapy protocols in humans.Abbreviations HSV Herpes simplex virus     

EBVTK激酶基因在原核细胞中的表达及其在NPC诊断中的意义

目的 探索以Epstein-Barr病毒（EBV）TK激酶为抗原，建立简便、快速、敏感和特异的鼻咽癌（NPC）诊断方法。方法 构建原核表达载体pRSET-TK，在原核细胞BL21（DF3）中获得高效表达的TK激酶，以Western blot检测证明其抗原的特异性和应用于NPC检测的可行性。以纯化的TK激酶为抗原初步建立ELISA检测方法，检测NPC患者血清中TK／IgG抗体。结果 在NPC患者血清中含有特异的针对TK激酶的IgG抗体，Western blot TK/IgG检测的敏感度和特异度均为100％。结论 初步建立了ELISA TK／IgG诊断NPC方法，具有较高的敏感性和特异性。     

Ad5F35-LMP2重组腺病毒免疫效果的研究

目的了解含有EB病毒潜伏膜蛋白2的非复制型重组腺病毒(Ad5F35-LMP2),免疫恒河猴的特异性细胞和体液免疫的效果。方法分别使用高剂量(1.5×1010TCID50/只)、中剂量(1.5×109TCID50/只)、低剂量(1.5×108TCID50/只)Ad5F35-LMP2重组腺病毒,同时设对照组(PBS4.0ml/只)。肌内注射免疫恒河猴,每个月一次,共免疫3次,第0、4、8、12周时使用Elispot方法检测猴外周血EBV-LMP2细胞毒性T细胞应答,同时应用免疫酶方法检测血清中LMP2抗体。结果3个剂量Ad5F35-LMP2腺病毒免疫恒河猴均可以诱导出有效的细胞免疫应答及一定的抗体应答,免疫应答水平的高低与病毒剂量的高低有一定的关系,较高剂量产生的细胞及体液免疫应答水平比低剂量的高。结论Ad5F35-LMP2非复制型重组腺病毒疫苗可以有效的诱导恒河猴产生EBV-LMP2特异性细胞和体液免疫反应。     

Inactivation of viruses infecting ectothermic animals by amphibian and piscine antimicrobial peptides

The ability of five purified amphibian antimicrobial peptides (dermaseptin-1, temporin A, magainin I, and II, PGLa), crude peptide fractions isolated from the skin of Rana pipiens and R. catesbeiana, and four antimicrobial peptides (AMPs) from hybrid striped bass (piscidin-1N, -1H, -2, and -3) were examined for their ability to reduce the infectivity of channel catfish virus (CCV) and frog virus 3 (FV3). All compounds, with the exception of magainin I, markedly reduced the infectivity of CCV. In contrast to CCV, FV3 was 2- to 4-fold less sensitive to these agents. Similar to an earlier study employing two other amphibian peptides, the agents used here acted rapidly and over a wide, physiologically relevant, temperature range to reduce virus infectivity. These results extend our previous findings and strongly suggest that various amphibian and piscine AMPs may play important roles in protecting fish and amphibians from pathogenic viruses.     

DNA polymerase gene locus of <Emphasis Type="Italic">Cercopithecine herpesvirus 1</Emphasis> is a suitable target for specific and rapid identification of viral infection by PCR technology

The family Herpesviridae comprises at least 100 herpesviruses. Numerous human and animal pathogenic herpesviruses have been identified so far, including Cercopithecine herpesvirus 1 (CeHV-1). This virus is a member of the subfamily Alphaherpesvirinae and is the most hazardous herpesvirus to man. CeHV-1 is also known as B-virus or monkey B virus and as Herpesvirus simiae. In order to gain more genetic information, the viral DNA polymerase (DPOL) gene was identified using polymerase chain reaction (PCR) and DNA nucleotide sequence analysis. The deduced amino acid sequence contains the motifs and signatures that are typical for the B-family of DPOLs. The DPOL gene of CeHV-1 was found to be a suitable target for the specific and rapid identification of the Cercopithecine herpesvirus 1 infection by PCR technology. Comparative analysis of the DNA sequences of the DPOL gene loci of CeHV-1, Human herpesvirus 1 and 2 (HHV-1 and HHV-2), and other herpesviruses was carried out for determination of unique genomic regions of the individual DPOL genes. A primer set of 12 primers was used for screening the DNA of CeHV-1, HHV-1, and HHV-2 by detailed PCR. It was found that six out of twelve primer combinations are able to detect specifically the CeHV-1 genome without cross reactivity with the genome of HHV-1 and/or HHV-2. The specificity of the individual amplified DNA fragments was confirmed by DNA nucleotide sequence analysis. The results of these studies indicate that the six primer combinations of the specific CeHV-1 DPOL primer set is the method of choice for a rapid, precise and specific identification of a CeHV-1 infection by PCR. Due to the fact that this specific CeHV-1 DPOL primer set does not amplify any DNAs of HHV-1 or HHV-2 genome this technology is stressing and can be successfully used unlimited and more credible in all laboratories with PCR technical facility routinely for detection of a CeHV-1 infection in vivo or in vitro.The GenBank Accession No. of the sequence of DNA polymerase gene of Cercopithecine herpesvirus 1 (CeHV-1) reported in this study is AY568415, DPOL protein ID AAT67222; nuclear phosphoprotein ID AAT67223     

肠道T细胞淋巴瘤临床特点

肠道T细胞淋巴瘤（intestinal T-cell lymphoma，ITCL）病情凶险，临床表现复杂，以非特异性症状为主。发病年龄轻，无明显的乳糜泻，EB病毒检出率高，回盲部、升结肠和降结肠受累多见是我国患者的特点，与西方国家报道不同。ITCL由于临床少见，极易误诊，且易复发，对治疗的反应和预后极差，死亡率高，应引起临床医师的广泛重视。     

水痘-带状疱疹病毒的潜伏与再激活机制研究进展

水痘-带状疱疹病毒(varicella-zoster virus,VZV)原发性感染通常会引起儿童期水痘,之后病毒可潜伏于人类外周神经节中,在数十年后重新激活造成带状疱疹,也与危及生命的脑炎、血管病变和脑膜炎等疾病有关。VZV潜伏和再激活的机制尚未得到很好的解释,原因之一是VZV只感染人类,无法使用大多数动物及动物来源的神经元模型。越来越多的证据表明,VZV潜伏是表观遗传学调控的,可用于信号通路分析和表观遗传调节鉴定的体外模型为探索VZV潜伏与再激活机制提供了帮助。此文综述了VZV的分子生物学和VZV潜伏与再激活机制方面的研究进展,并提出了未来的研究方向。