广州地区AIDS患者中人类疱疹病毒8感染的检测

目的:检测广州地区艾滋病AIDS患者中人类疱疹病毒8(HHV-8)的感染状况,探讨本地区AIDS患者发生HHV-8感染相关疾病的可能风险。方法:采用巢式聚合酶链反应(n-PCR)法检测患者唾液中的HHV-8 DNA。结果:在广州地区AIDS患者唾液中HHV-8 DNA阳性率为20.0%,而对照组的阳性率为0,两组比较差异有显著性(P<0.01)。结论:在广州地区的AIDS患者中存在较高的HHV-8感染。     

人类疱疹病毒6、7、8型与巨细胞病毒对大肠肿瘤致病的协同作用

目的:检测HHV-6、7、8及CMV在大肠肿瘤中的感染,探讨其致病的协同作用。方法:取20例大肠肿瘤标本,其中10例良性病变(炎性息肉、乳头状瘤和绒毛状腺瘤),10例恶性病变(癌和腺瘤恶变)。应用巢式PCR法,分别检测两组病变组织中HHV-6、7、8和MCV的DNA片段。结果:HHV-6检测结果表明恶性病变组阳性反应率为90%(9/10),良性病变组阳性反应率为60%(6/10),其产物为132bpDNA片段;HHV-7检测结果示恶性病变组阳性反应率为40%(4/10),良性病变组阳性反应率为0(0/10),其产物为92bpDNA片段;HHV-8检测结果示恶性病变组阳性反应率为90%(9/10),良性病变组阳性反应率为20%(2/10),其产物为177bpDNA片段;检测CMV结果示恶性病变样本组阳性反应率为100%(10/10),良性病变样本组阳性反应率为100%(10/10),其产物为85bpDNA片段。结论:CMV在良、恶性大肠肿瘤病变中均有较高的感染率,HHV-6、7、8在恶性病变组中感染率较良性组高,是需要警惕的致病因素。     

广州地区发热幼儿中人类疱疹病毒7的检测

目的：检测广州地区发热幼儿中人类疱疹病毒7(HHV-7)的感染状况，从而了解HHV-7感染在此类疾病中的病原学意义。方法：采用n-PCR法检测患儿血浆中的HHV-7DNA。结果：在发热疾病组中血浆HHV-7DNA阳性率为18．0％，而在作为对照的健康组及非发热疾病组的阳性率分别为0和5．4％，发热疾病组与对照组间比较有显著性差异。结论：在广州地区的发热幼儿中HHV-7感染具有一定的病原学意义。     

人类8型疱疹病毒K1基因真核表达载体的构建

为构建人类8型疱疹病毒(Human herpesvirus 8,HHV-8)K1基因的真核表达载体,采集卡波氏肉瘤(Kaposi's sarcoma,KS)患者血清,采用柱式病毒DNA抽提试剂盒抽提血清中的病毒DNA,采用套式PCR技术检测HHV-8的特异性片断KS330233以判断是否得到了HHV-8 DNA,采用PCR技术扩增HHV8 K1基因并纯化回收,酶切、连接入真核表达载体pcDNA3.1,转化大肠杆菌DH5α,挑取阳性克隆pcDNA3.1/HHV8-K1扩增后,提取质粒,进行双酶切和DNA测序鉴定.结果显示采集了经典型KS血清3例,提取了血清HHV-8DNA,扩增了特异性片断KS330233,测序结果正确提示我们得到了HHV8 DNA,扩增了HHV8 K1基因,构建了pcDNA3.1/HHV8-K1真核表达载体,经限制性内切酶酶切鉴定及测序分析证实了其序列的正确性.由此可知:成功构建了pcDNA3.1/HHV8-K1真核表达载体,为进一步研究该基因的功能奠定良好的实验基础.     

甲基-β-环湖精对人类疱疹病毒6型感染性的影响

目的了解甲基-β-环糊精对人类疱疹病毒6型包膜胆固醇含量及其病毒感染性的影响.方法用不同浓度的甲基环糊精作用于HHV-6A GS株,经20%蔗糖缓冲液梯度离心,去除甲基-β-环糊精并纯化病毒,分别进行病毒胆固醇含量的测定及感染HSB-2细胞,然后采用IFA法和免疫蛋白杂交等方法检测病毒受甲基环湖精作用后,其对靶细胞的结合、融合、进入的影响以及包膜糖蛋白的表达.结果甲基-β-环糊精能去除HHV-6A包膜胆固醇,病毒的感染性遭到了破坏,但可以被外源性胆固醇所恢复.HHV-6A结合宿主细胞的能力稍微受到影响,但其感染性及诱导细胞融合的能力显著减弱,包膜糖蛋白的表达不受影响.结论HHV-6A包膜胆固醇在细胞融合过程中起着重要作用,同时也是病毒进入宿主细胞的关键因素.     

唾液IgG抗体测定在幽门螺杆菌感染诊断中的价值

目的 :探讨唾液抗幽门螺杆菌(Helicobacterpylori,Hp)IgG测定对Hp感染的诊断价值。方法 :用ELISA法测定67例Hp阳性及20例Hp阴性患者的唾液内抗HpIgG ,并与血清抗体测定结果比较。结果 :唾液抗HpIgG对Hp感染的敏感性为91 1% ,特异性为85 0% ,准确性为89 7 % ,与血清测定结果接近(分别为92 6 % ,90 0%和91 9 %)。结论 :唾液抗Hp抗体测定对Hp感染的诊断有较好的应用价值。     

瑟布素疗法治疗风湿性关节炎20例观察

目的:通过蒙医瑟布素疗法治疗风湿性关节炎,进一步证明此疗法的临床疗效.方法:采用披法、瘤胃内纳入法及脏器贴敷法,对20例风湿性关节炎患者进行观察.结果:显效15例(75%),有效4例(20%),无效1例(5%),总有效率95%.结论:此疗法对风湿性关节炎有显著疗效,值得进一步深入研究推广应用.     

幽门螺杆菌感染与胃癌的关系

目的 :探讨幽门螺杆菌 (简称 Hp)感染与胃癌的关系。方法 :43例胃癌患者的新鲜癌手术标本及血清标本、36例十二提肠溃疡患者 (对照组 )的胃窦粘膜组织及血清标本入本组研究。分别采用 PCR及血清学试验检测其 Hp感染状况 ,两项检测均为阳性者即确立为 Hp感染。结果 :(1) 4 3例胃癌中 ,Hp阳性 30例 ,阳性率 6 9.77% ;36例十二指肠溃疡中 ,Hp阳性 30例 ,阳性率 83.33% ,两组阳性率相比差异无显著性。Hp阳性患者中 ,胃癌及对照组 cag A基因阳性分别为 2 4例、2 5例 ,阳性率分别为 80 .0 0 %、83.33% ,两组阳性率相比差异无显著性。(2 ) 4 3例胃癌中 ,高中分化腺癌组 Hp及 cag A检出率分别为 6 2 .5 0 %及 70 .0 0 % ,低未分化癌组 Hp及 cag A检出率分别为 74.0 7%及 85 .0 0 % ,但两组 Hp及 cag A检出率统计学上均无显著性差异。结论 :(1) Hp感染及 cag A+ 菌株感染不是胃癌发生的唯一或必须因素。 (2 )胃癌的分化程度与 Hp及cag A+菌株感染无明显相关性。     

中药对球虫感染雏鸡血清乳酸脱氢酶和碱性磷酸酶活性的影响

将120只14日龄蛋公雏随机分为未感染对照组(I)、感染对照组(Ⅱ)和中药组(Ⅲ).除I组外,其余每只鸡口服感染8.0×104个E.tenella孢子化卵囊,分别于感染0,3,6,9 d采血,用于血清LDH和ALP活性的测定.结果表明:Ⅱ组血清LDH活性在感染后3,6 d比Ⅰ组分别提高了48.35%(p＜0.01)和53.47%(p＜0.01),ALP活性在感染后6 d比Ⅰ组也显著提高了28.74%(p＜0.05).与Ⅱ组相比,Ⅲ组血清LDH活性在感染后3,6 d分别显著降低了30.77%(p＜0.01)和23.36%(p＜0.05),并与Ⅰ组差异不显著(p＞0.05);ALP活性虽然与Ⅱ组差异不显著,但在感染高峰期(6 d),比其降低了16.92%,且与Ⅰ组也无明显差异(p＞0.05).提示中药能抵抗球虫感染,有助于保持血清LDH和ALP的相对恒定.     

MHD患者医院感染危险因素分析及预防措施

目的:探究维持性血液透析(MHD)患者发生医院感染可能存在的影响因素,并提出相应的预防措施.方法:收集我院2016年1月~2016年12月期间行MHD患者临床资料100例,记录患者原发病、年龄、血液透析(HD)次数、血清白蛋白以及血红蛋白水平,对所有收集数据通过SPSS19.0软件进行统计分析.结果:100例MHD患者中出现48例感染,呼吸系统感染率为31.25%以及血液系统感染率为22.91%较为常见;数据分析显示,原发病是糖尿病肾病的患者较其他原发病患者,更容易出现医院感染,差异有统计学意义(P0.05);同时患者的年龄、患者透析次数、血清白蛋白和血红蛋白也是影响患者感染的因素,且差异有统计学意义(P0.05).结论:在MHD患者临床治疗过程中,由于患者出现感染的几率较大,因此诊治过程中应积极控制原发病,注意无菌操作,针对感染相关因素进行预防,降低患者感染,保证患者生命质量.     

Productive dual infection of human CD4+ T lymphocytes by HIV-1 and HHV-6

Although infection by HIV-1 has been implicated as the primary cause of AIDS and related disorders, cofactorial mechanisms may be involved in the pathogenesis of the disease. For example, several viruses commonly detected in AIDS patients and capable of transactivating the long terminal repeat of HIV-1, such as herpesviruses, papovaviruses, adenoviruses and HTLV-I have been suggested as potential cofactors. Another candidate is human herpesvirus-6 (HHV-6, originally designated human B-lymphotropic virus), which has not only been identified in most patients with AIDS by virus isolation, DNA amplification techniques and serological analysis, but is also predominantly tropic and cytopathic in vitro for CD4+ T lymphocytes. Here we demonstrate that HHV-6 and HIV-1 can productively co-infect individual human CD4+ T lymphocytes, resulting in accelerated HIV-1 expression and cellular death. We also present evidence that HHV-6 transactivates the HIV-1 long terminal repeat (LTR). These observations indicate that HHV-6 might contribute directly or indirectly to the depletion of CD4+ T cells in AIDS.     

PCR和原杂交技术检测鼻咽癌石蜡组织中HHV-6DNA

为了解人疱疹病毒６型（ＨＨＶ－６）与鼻咽癌（ＮＰＣ）的可能关系，检测了ＮＰＣ发生不同阶段的石蜡组织中ＨＨＶ－６ＤＮＡ的存在情况。方法：采用ＰＣＲ、斑点杂交和原位杂交技术，共检测了４２例鼻咽癌石蜡组织、２１例鼻咽癌前病变石蜡组织和２７例正常鼻咽石蜡组织ＨＨＶ－６ＤＮＡ的存在情况。结果：通过ＰＣＲ扩增，在４２例ＮＰＣ组织中检出１３例存在ＨＨＶ－６ＤＮＡ，占３１％；２１例鼻咽癌前病变组织中１例阳性（４７％），而２７例正常鼻咽组织中无一例阳性。斑点杂交的结果表明ＰＣＲ扩增是ＨＨＶ－６特异的。原位杂交发现，在１３例ＰＣＲＨＨＶ－６阳性的ＮＰＣ组织中１１例ＨＨＶ－６ＤＮＡ阳性。ＨＨＶ－６ＤＮＡ主要分布于癌巢的肿瘤细胞核内，少数亦可见于癌旁的异型细胞，但在淋巴细胞及正常上皮细胞内未发现阳性信号。结论：本实验用分子生物学技术首次证明，在中国ＮＰＣ患者的鼻咽石蜡组织中存在ＨＨＶ－６。ＨＨＶ－６与ＮＰ相关，并有可能在ＮＰＣ的癌变过程中起一定的作用     

Acquisition of the human adeno-associated virus type-2 rep gene by human herpesvirus type-6.

Human herpesvirus type-6 (HHV-6) is a recently isolated herpesvirus which is highly prevalent in adult populations around the world. HHV-6 was first isolated from the peripheral blood of six individuals with lymphoproliferative disorders, two of whom were also infected with human immunodeficiency virus. HHV-6, in common with other herpesviruses, transactivates the HIV long terminal repeat linked to reporter genes and has in addition been shown to accelerate HIV gene expression and CD4 cell death in cultures co-infected with both viruses. The virus is tropic for CD4+ lymphocytes and persists in the peripheral blood of most seropositive individuals. We have now identified a gene in HHV-6 encoding a 490-amino-acid polypeptide homologous to the human adeno-associated virus type-2 (AAV-2) rep gene. This gene has an essential role in AAV-2 DNA replication, can trans-regulate homologous and heterologous gene expression, and inhibits cellular transformation. The acquisition of rep by HHV-6 could be due to natural transfer of genetic information between DNA viruses of eukaryotes and is likely to have important consequences for the life-cycle of HHV-6 and for the host CD4 cell.     

人类疱疹病毒6B包膜糖蛋白gO在感染细胞中的表达与检测

目的了解人类疱疹病毒6B包膜糖蛋白gO在感染细胞中的表达时间,为今后研发抗病毒药物提供实验依据.方法采用免疫荧光染色法镜检不同时间段的人类疱疹病毒6B感染细胞,并平行收集样本,用蛋白免疫印迹法对样本进行gO 鉴定,以了解其表达状态.结果荧光显微镜观察显示gO开始表达的时间为感染后20 h,在120 h达到高峰,蛋白免疫印迹检测的结果基本与前者相符.结论人类疱疹病毒6B包膜糖蛋白gO为病毒的晚期蛋白.     

Association of rheumatoid arthritis and primary osteoarthritis with changes in the glycosylation pattern of total serum IgG

Rheumatoid arthritis (RA) is a widely prevalent (1-3%) chronic systemic disease thought to have an autoimmune component; both humoral and cellular mechanisms have been implicated. Primary osteoarthritis (OA) is considered to be distinct from rheumatoid arthritis, and here damage is thought to be secondary to cartilage degeneration. In rheumatoid arthritis, immune complexes are present that consist exclusively of immunoglobulin, implying that this is both the 'antibody' (rheumatoid factor [RF]) and the 'antigen' (most commonly IgG). Autoantigenic reactivity has been localized to the constant-region (C gamma 2) domains of IgG. There is no evidence for a polypeptide determinant but carbohydrate changes have been reported. We have therefore conducted a study, simultaneously in Oxford and Tokyo, to compare in detail the N-glycosylation pattern of serum IgG (Fig. 1) isolated from normal individuals and from patients with either primary osteoarthritis or rheumatoid arthritis. The results, which required an evaluation of the primary sequences of approximately 1,400 oligosaccharides from 46 IgG samples, indicate that: (1) IgG isolated from normal individuals, patients with RA and patients with OA contains different distributions of asparagine-linked bi-antennary complex-type oligosaccharide structures, (2) in neither disease is the IgG associated with novel oligosaccharide structures, but the observed differences are due to changes in the relative extent of galactosylation compared with normal individuals. This change results in a 'shift' in the population of IgG molecules towards those carrying complex oligosaccharides, one or both of whose arms terminate in N-acetylglucosamine. These two arthritides may therefore be glycosylation diseases, reflecting changes in the intracellular processing, or post-secretory degradation of N-linked oligosaccharides.