亚洲牛带绦虫成虫延伸因子-1基因的表达、纯化及免疫学分析

目的 对亚洲牛带绦虫成虫延伸因子-1(elongation factor 1,EF-1)基因进行克隆、表达和免疫学初步研究.方法 将亚洲牛带绦虫成虫EF-1克隆到原核表达质粒pET-28a( )中,在大肠杆菌BL-21/DE3中用异丙硫代-β-D半乳糖苷诱导表达,表达产物通过十二烷基磺酸钠-聚丙烯酰胺凝胶电泳(SDS-PAGE)进行鉴定,用镍离子金属螯合剂亲和层析柱进行纯化,用蛋白印迹法(Western blotting)进行免疫学分析.结果 PCR、双酶切及DNA测序结果 均表明重组质粒pET-28a( )-EF-1构建成功.重组蛋白可被感染了亚洲牛带绦虫患者血清和猪血清识别,表明其具有免疫反应性.结论 亚洲牛带绦虫成虫EF-1基因可在原核表达系统中获得具有免疫学活性的表达,为进一步研究该蛋白的功能奠定了基础.     

Effect of ABCA1-V771M polymorphism on plasma lipid levels and its relationship with coronary atherosclerotic heart disease

Objective To explore the risk association of ABCA1-V771M polymorphism with coronary heart disease (CHD) in Hart nationality in Northwest of China. Methods With case-control study, ABCA1-V771M polymorphism was detected in 204 unrelated Hart nationality people in Northwest of China, and all the subjects by coronary angiography were grouped into 106 cases and 98 controls. The genotypes and alleles frequency distribution of ABCA1-V771M polymorphisms were analyzed by PCR-RFLP analysis, and the clinical statistics of serum lipids were compared and its effects of ABCA1-V771M polymorphism on the plasma lipid levels and coronary atherosclerotic heart disease were analyzed. Results The genotypic frequencies of ABCA1-V771M polymorphism matched well under Hardy-Weinberg equilibrium (P>0.05), V and M allelic frequencies were 33.3% and 66.7%. In comparison with VV VM genotype carriers, MM genotypes carriers had much lower plasma levels of HDL-C (P<0. 001) and much higher plasma levels of TG (P<0. 05). M allelic frequency in CHD group was significantly higher than V allelic frequency (P<0. 05). M allele was related with more severity of atherosclerosis in the coronary artery than V allele (P<0.05). However, there was no obvious difference in the incidence of AMI among carriers with three genotypes of ABCA1-V771M polymorphism (P>0.05). Conclusion ABCA1-V771M polymorphism was not only associated with the plasma levels of HDL-C and TG, but also related to the susceptibility and severity of coronary atheroselerotic heart disease. Moreover, M771 allele appeared to be atherogenie among Han population in Northwest of China.     

慢性萎缩性胃炎细胞间粘附分子的免疫组化研究

作者采用免疫组化的方法,原位观察比较了慢性萎缩性胃炎与正常胃粘膜组织中细胞间粘附分子(ICAM—1)的原位表达。结果发现,与正常胃粘膜比较,慢性萎缩性胃炎组织有大量ICAM—1阳性炎性细胞浸润,且其数目与病变程度呈平行关系,提示ICAM—1的表达在慢性胃炎的发病机制中可能具有重要意义。     

IN SITU EXPRESSION OF THE CELL ADHESION MOLECULE IN GASTRIC CARCINOMA AND CHRONIC GASTRITIS

ＩＮＳＩＴＵＥＸＰＲＥＳＳＩＯＮＯＦＴＨＥＣＥＬＬＡＤＨＥＳＩＯＮＭＯＬＥＣＵＬＥＩＮＧＡＳＴＲＩＣＣＡＲＣＩＮＯＭＡＡＮＤＣＨＲＯＮＩＣＧＡＳＴＲＩＴＩＳＣｈｅｎＧａｏｐｉｎｇ（陈高平）；ＬｉｕＹｏｎｇ（刘勇）；ＲｅｎＨｕｉｍｉ（任惠民）；ＬｉＨｅ...     

HBV Pre S1蛋白质在酵母细胞中具有转录激活功能

为探讨应用双杂交体系统克隆与HBVPreS1蛋白质结合的肝细胞受体的可行性，我们构建了HBVPreS1蛋白质与酵母GAL4DNAbindingdomain融合蛋白质酵母表达质粒。通过应用该质粒转化酵母菌株SFY526，检测报道基因产物五半乳糖苷酶活性，结果表明HBVPreS1蛋白质在酵母细胞中具有转录激活功能。能否去除PreS1蛋白质转录激活功能区域但却保留其与肝细胞受体的结合区域用于酵母双杂交体系统筛选肝细胞cDNA文库、克隆与PreS1蛋白质结合的肝细胞受体尚需进一步实验探讨。     

EXPRESSIONS OF P53, PROLIFERATING CELL NUCLEAR ANITIGEN, BCL-2 PROTEIN AND THEIR SIGNIFICANCE IN SALIVARY ADENOID CYSTIC CARCINOMA

Studiesonthecarcinomasshowedthatthespeedofcarcinomadevelopmentisdependentonthebalanceofcellproliferatingandapoptosis.Soitisveryimportanttostudythemechanismbywhichoncogenescontrolproliferationandapoptosisoftu-morcell.Moststudiesonsalivaryglandtumorshavelaidemphsisontheproliferatingfunctionofonco-genesathomeandabroad,andignoranteditsfunc-tiononapoptosis,especially,thestudieswerefew-.erincombiningtwokindsoffunction.Helen's[13studyonACCindicatedthatmutationofP,3doesn'tplayimportantroleincarcinog…     

MAPPING EPITOPES OF HUMAN PAPILLOMAVIRUS TYPE 16 L1 PROTEIN WITH A PHAGE DISPLAY EPITOPE LIBRARY

Theinfectionofhumanpapillomavirus(HPV)isakindofcommonsexuallytransmitteddiseases.Thehigh-riskgroupHPV,especiallyHPV16iscolselyassociatedwithhumancervicalcancer,anditwasindicatedasaninitiationfactorofcervicalcancertl].HPV16FIgenelocatedinlateopenreadingframesoftheviralgenomeencodesthemajorcoatprotein,LIprotein,whichcouldassembleintoviruslikeparticles(VLP)aloneintheinfectiousnucleit23.AbatchofevidencesshowedthattheLIproteincouldinduceantibodieswithhightiterinthehostandtheantibodiesmightp…     

IL-1β、TNF-α和NO水平变化在某些神经系统疾病中的意义

目的　探讨在高原条件下IL 1 β、TNF α及NO水平变化在某些神经系统疾病中的意义。方法　以多发性硬化 (MS)、格林 巴利综合症 (GBS)和帕金森氏病 (PD)患者为对象 ,用ELISA法测定血清及脑脊液中IL 1 β、TNF α和NO水平。结果　MS和GBS患者血清及脑脊液中的IL 1 β、TNF α及NO水平与对照组相比显著升高 (P <0 0 1 ) ;PD患者血清中该三种物质与对照组相比无明显变化 ,但脑脊液中的TNF α和NO明显高于对照组 (P <0 0 1 )。结论　提示IL 1 β、TNF α及NO在MS、GBS和PD发病机制中可能起着重要作用 ,它们之间也许存在一种网络调节关系。     

金纳多对抗大鼠脑出血后脑水肿的作用机制

目的探讨金纳多对抗脑出血后脑水肿形成的作用机制。方法选健康Wistar大鼠80只,雌雄不拘,随机分为4组,每组20只。采用立体定向注射方法,用微量注射器在右侧尾状核部位,注入50μL生理盐水(A、B组)或等量自体血红蛋白(C、D组)。术后A、C组给予50 g/L羧甲基纤维素钠溶液3 mL灌胃,B、D组给予等量羧甲基纤维素钠溶解均匀的金纳多(200 mg/kg)溶液灌胃,每日1次,持续3周。断头取脑,测定超氧化物歧化酶(SOD)、丙二醛(MDA)值及血红素氧合酶-1(HO-1)阳性细胞数。结果除A、B组比较无明显差异外,其余各组间SOD、MDA含量及HO-1阳性细胞数比较差异均有统计学意义(P<0.05)。结论金纳多可以抑制血红蛋白所引起的脑水肿。     

RSV下呼吸道感染患儿辅助性T细胞亚群Th1/Th2及相关因子的研究

目的　探讨辅助性T淋巴细胞Th1 /Th2亚群及其相关细胞因子IFN γ、IL 4在呼吸道合胞病毒 (RSV)下呼吸道感染患儿发病机制中的作用。方法　用单克隆抗体双色免疫荧光FITC/PE双标记 ,流式细胞仪检测 3 0例RSV下呼吸道感染患儿急性期外周血单个核细胞(PBMCs)辅助性T淋巴细胞CD+4及其Th1亚群CD+4CD45RA+,Th2亚群CD+4CD45RO+的表达 ,并用ELISA方法同时检测患儿血清中细胞因子IFN γ、IL 4水平。同期检测 1 5例年龄、性别无差异的健康婴儿为对照。结果　RSV下呼吸道感染组患儿外周血辅助性T淋巴细胞CD+4明显低于对照组 (P <0 .0 5 ) ,Th1细胞CD+4CD45RA+明显下降 (P <0 .0 5 ) ,Th2细胞CD+4CD45RO+虽有下降 ,但与对照组相比无统计学差异 (P >0 .0 5 )。Th1 /Th2比值与对照组相比明显降低 (P <0 .0 5 )。RSV下呼吸道感染组患儿血清中IFN γ、IL 4水平均有降低 ,以IFN γ水平下降最为明显 (P <0 .0 1 ) ,IFN γ/IL 4比值降低 (P <0 .0 5 )。结论　婴幼儿RSV下呼吸道感染急性期的免疫功能紊乱主要表现为Th1及其功能下降 ;Th2及其功能相对增强 ,Th1 /Th2的失衡是导致该病发生Th2样反应的重要免疫机制。