霍乱弧菌O1群稻叶型流行株和非流行株的蛋白质谱特征分析

目的探讨霍乱弧菌01群稻叶型流行株和非流行株的蛋白表达的差异。方法利用裂解液处理霍乱弧菌,提取全菌蛋白;采用pH梯度等电聚焦对菌蛋白进行双向电泳;考马斯亮蓝染色后获得的双向电泳图谱,并利用ImageMaster2DElite5．0图象分析软件进行分析,找出差异蛋白;在此基础上,胰蛋白酶消化这些特殊差异蛋白,并进行质谱（MALDI-TOF—MS）分析。结果获得了（1081±16）个蛋白斑点,蛋白主要集中在pI4．00—7．20之间,重复胶的匹配点数为（1057±28）,匹配率为97．85％;发现了有明显差异的21个蛋白点,并进行了质谱鉴定。结论获得了霍乱弧菌01群稻叶型流行株和非流行株的差异表达蛋白。     

应用蛋白质谱建立活动性肺结核病的血清诊断模型

目的 应用蛋白质谱技术研究活动性肺结核病患者的血清诊断标志物,建立诊断模型早期诊断活动性肺结核.方法 应用表面加强激光解吸-电离飞行时间质谱技术(SELDI-TOF-MS)和蛋白芯片技术检测264例活动性肺结核患者、其他呼吸疾病患者和正常人血清;应用Ciphergen蛋白芯片3.1.1软件比较、分析血清蛋白峰,找出差异蛋白;应用Biomarker Pattern 5.0软件建立活动性肺结核的诊断模型.结果 129例活动性肺结核血清和135例对照血清蛋白指纹图谱比较,有50个差异蛋白峰(P<0.01).以69例其他呼吸疾病血清和66例健康人血清为对照,选择5个蛋白峰(4360、3311、8160、5723、15173 m/z)建立诊断模型1,该模型诊断活动性肺结核的灵敏度为82.95%,特异性为89.63%,准确率为86.36%.以69例其他呼吸疾病血清为对照,选择3个蛋白峰(5643、4486、4360 m/z)建立诊断模型2,该模型诊断活动性肺结核的灵敏度为96.9%,特异性为97.8%,准确率为97.3%.结论 应用蛋白质谱技术分析肺结核病患者血清可能建立一种新的结核病早期诊断方法 .     

基于MALDI-TOF MS质谱峰分析细菌耐药性的研究进展

基质辅助激光解吸电离飞行时间质谱(MALDI-TOF MS)已成为微生物鉴定领域广泛应用的方法,其快速、准确、高通量等明显优势吸引众多研究探索其他微生物领域适用范围,当前已报道了多个基于MALDI-TOF MS对细菌进行耐药分析的研究,通过对质谱进行简单的视觉分析或利用信息学和统计学对整个质谱进行更复杂的分析来识别耐药...     

抗人羧酸酯酶-Ⅱ单克隆抗体的制备与鉴定

目的制备鼠抗人羧酸酯酶-Ⅱ(humancarboxyles-terases-Ⅱ,hCE-Ⅱ)单克隆抗体(mAb)并对其特性进行鉴定。方法以含hCE-Ⅱ的人肝脏微粒体蛋白混合抗原免疫BALB/c小鼠,采用杂交瘤技术制备鼠抗hCE-Ⅱ的mAb,并用Protein-G亲和层析法纯化mAb。用间接ELISA法测定mAb的效价,以Westernblot鉴定mAb的特异性、免疫组化染色法对mAb相应的抗原进行组织定位。用免疫沉淀和基质辅助激光解吸电离飞行时间质谱(matrix-assistedlaserdesorption/ionizationtime-of-flightmassspectrometry,MALDI-TOF-MS)得到相应的肽质量指纹谱(peptidemassfingerprint,PMF),再通过Mascot在人类蛋白质数据库中分析比对鉴定mAb对应的抗原。结果获得1株可持续、稳定分泌抗hCE-Ⅱ的mAb的杂交瘤细胞系。杂交瘤细胞分泌的mAbIg的亚类(型)为IgG1(κ),腹水mAb的效价达1×10-7。Westernblot分析显示,在Mr为62000处有1条清晰的带。免疫组化染色显示,该mAb可与肝细胞的浆蛋白结合(hCE-Ⅱ存在于肝细胞浆内微粒体),而不与血管平滑肌细胞内的蛋白结合。该mAb免疫沉淀物的Mr为62000,与hCE-Ⅱ的Mr相符。对免疫沉淀的蛋白质进行质谱鉴定证实,该mAb对应的抗原为hCE-Ⅱ。结论制备出的鼠抗hCE-Ⅱ的mAb效价高、特异性良好,为进一步研究hCE-Ⅱ的功能及其在肝癌等癌症的诊断和治疗中的作用提供了工具。     

核因子-κB受体激活因子配体基因多态性与类风湿关节炎易感性的研究

目的 研究中国汉族人群中核因子-κB受体激活因子配体(receptor activator of NF-κB ligand,RANKL) rs7984870基因多态性与类风湿关节炎(RA)发生危险因素关系.方法 采用以医院为基础的病例-对照研究,基质辅助激光解吸电离飞行时间质谱( matrix-assisted laser desorption/ionization time-of-flight mass spectrometry,MALDI-TOF MS)技术分析214例RA患者和478例对照RANKLrs7984870 C＞G基因多态性,计算各种基因型的RA发生风险及其95%可信区间.结果 RANKL rs7984870 C＞G基因3种基因型CC、CG和GG在RA组和对照组的频率分别为27.3% (CC)、51.2% (CG)、21.5% (GG)和25.3% (CC)、49.1% (CG)、25.7% (GG),Logistic回归发现与携带RANKL rs7984870 CC基因型的个体相比较,携带RANKL rs7984870 GG等位基因型与RA的发病风险无明显相关(OR=0.78,95% CI=0.49 ～ 1.24).结论 RANKL rs7984870基因多态性可能不是RA发生的危险因素,需要进一步研究证实.     

C3基因单核苷酸多态性与成人哮喘易感性的相关性研究

目的 探讨C23基因的单核苷酸多态性与华南汉族成人支气管哮喘发病的相关性.方法 应用病例对照研究,收集2006年2月至2010年2年南方医院和广东医学院附属医院确诊的汉族成人哮喘患者484例为研究对象,同期健康查体者553名为对照,应用MassARRAY-IPLEX技术和基质辅助激光解吸电离飞行时间质谱平台(matrix-assisted laser desorption/ionization time of flight mass spectrometry,MALDI-TOF-MS)对C3基因的rs10402876和rs366510位点进行基因分型.结果 在华南汉族人群中rs10402876检测到GG、GC和CC 3种基因型,rs366510检测到GG、GT和TT 3种基因型,分型成功率为98.94%.与对照组相比,哮喘组rs10402876的基因型分布(χ2=0.346,P=0.841)和等位基因分布(χ2=0.101,P=0.751)差异均无统计学意义;而rs366510的基因型分布(χ2=9.759,P=0.008;Bonferroni校正法,P=0.016)和等位基因分布(χ2=5.294,P=0.021;Bonferroni校正法,P=0.042)差异均有统计学意义.与GG+GT基因型相比,rs366510的TT基因型显著增加哮喘发生的危险性(OR=1.471,95%CI:1.125～1.923).结论 C3基因rs366510位点单苷酸多态性可能与华南汉族成人哮喘易感性有关.

Abstract：

Objective To investigate the association between single nucleotide polymorphisms (SNPs) of the complement component 3 gene (C3) and adult asthma of Hans in southern China. Methods A casecontrol study was performed. Four hundred and eighty-four adult asthma patients diagnosed in Nanfang Hospital and Affiliated Hospital of Guangdong Medical College, and 553 healthy subjects were collected from 2006 to 2010 for the study. MassARRAY-IPLEX and matrix-assisted laser desorption/ionization time of flight mass spectrometry (MALDI-TOF-MS) techniques was used to determine the genotypes of the rs10402876 and rs366510 loci of C3 gene. Results Genotypes GG, GT and TT in the rs366510 locus, and genotypes GG, GT and TT in the rs10402876 locus were detected. A total of 98. 94 percent of samples were genotyped. There were no significant differences in genotype frequencies (χ2 =0. 346, P=0. 841 ) and allele frequencies (χ2 =0. 101,P=0. 751) of rs10402876 between the two groups. However, genotype and allele frequencies of the rs366510 locus were significantly different (χ2 = 9.759, P=0. 008, Bonferroni correction,P= 0. 016; χ2 = 5. 294, P= 0. 021, Bonferroni correction, P = 0. 042, respectively). Compared with genotypes GG+GT, genotype TT of rs366510 significantly increased the risk of asthma, with the odds ratio of 1. 471 (95 % confidence interval 1. 125-1. 923). Conclusion These results suggest that C3 gene could be associated with adult asthma of Han population in southern China.     

蛋白质组学的相关技术研究进展

目前,生物学研究已进入后基因组时代,一个以＂蛋白质组＂为研究重点的生命科学新时代已悄然到来.近年来,蛋白质组技术发展迅速,激光捕获微切割、蛋白质芯片、同位素包被亲和标记等新技术,促进了蛋白质组学的发展.综述了近年蛋白质组学相关新技术的进展及其应用情况.     

帕金森病相关血清蛋白质标志物的筛选及鉴定

 目的：探讨并初步鉴定帕金森病患者血清中相关蛋白质作为特异标志物的可能性。方法：应用表面增强激光解吸电离飞行时间质谱(SELDI-TOF-MS)结合纳米磁珠技术检测44例帕金森病和60例健康对照的血清标本,应用生物信息学方法筛选差异蛋白峰,经高效液相色谱（HPLC）分离出差异蛋白,酶解后进行液质联用串联质谱（LC-MS/MS）分析,利用Xcalibur的程序组件BioWorks 3.2完成蛋白质序列数据库鉴定分析。结果：经SELDI-TOF-MS结合纳米磁珠技术筛选出质荷比m/z位于8 937的蛋白质在帕金森病中高表达(帕金森病组表达强度为27.47±16.58,正常组表达强度为5.01±3.47),有显著差异(P<0.01);6 636和8 697的蛋白质在帕金森病中低表达(帕金森病组表达强度为5.43±2.66和20.22±9.57,正常组表达强度为18.85±7.56和51.13±26.22), 有显著差异(P<0.01)。联合上述3种潜在蛋白质标志物,可区分帕金森病组和对照组,其中帕金森病患者检出率为90.0%(27/30),健康者检出率为92.5%（37/40）。对m/z为6 636、8 697和8 937的标志物进行鉴定,结果分别为载脂蛋白C-I、载脂蛋白 C-III 和补体成分3a。结论：鉴定出的载脂蛋白 C-I、载脂蛋白C-III和补体成分3a在帕金森病的诊断中具有一定价值,值得进一步研究和探讨。     

C3基因单核苷酸多态性与成人哮喘易感性的相关性研究

Objective To investigate the association between single nucleotide polymorphisms (SNPs) of the complement component 3 gene (C3) and adult asthma of Hans in southern China. Methods A casecontrol study was performed. Four hundred and eighty-four adult asthma patients diagnosed in Nanfang Hospital and Affiliated Hospital of Guangdong Medical College, and 553 healthy subjects were collected from 2006 to 2010 for the study. MassARRAY-IPLEX and matrix-assisted laser desorption/ionization time of flight mass spectrometry (MALDI-TOF-MS) techniques was used to determine the genotypes of the rs10402876 and rs366510 loci of C3 gene. Results Genotypes GG, GT and TT in the rs366510 locus, and genotypes GG, GT and TT in the rs10402876 locus were detected. A total of 98. 94 percent of samples were genotyped. There were no significant differences in genotype frequencies (χ2 =0. 346, P=0. 841 ) and allele frequencies (χ2 =0. 101,P=0. 751) of rs10402876 between the two groups. However, genotype and allele frequencies of the rs366510 locus were significantly different (χ2 = 9.759, P=0. 008, Bonferroni correction,P= 0. 016; χ2 = 5. 294, P= 0. 021, Bonferroni correction, P = 0. 042, respectively). Compared with genotypes GG+GT, genotype TT of rs366510 significantly increased the risk of asthma, with the odds ratio of 1. 471 (95 % confidence interval 1. 125-1. 923). Conclusion These results suggest that C3 gene could be associated with adult asthma of Han population in southern China.     

C3基因单核苷酸多态性与成人哮喘易感性的相关性研究

Objective To investigate the association between single nucleotide polymorphisms (SNPs) of the complement component 3 gene (C3) and adult asthma of Hans in southern China. Methods A casecontrol study was performed. Four hundred and eighty-four adult asthma patients diagnosed in Nanfang Hospital and Affiliated Hospital of Guangdong Medical College, and 553 healthy subjects were collected from 2006 to 2010 for the study. MassARRAY-IPLEX and matrix-assisted laser desorption/ionization time of flight mass spectrometry (MALDI-TOF-MS) techniques was used to determine the genotypes of the rs10402876 and rs366510 loci of C3 gene. Results Genotypes GG, GT and TT in the rs366510 locus, and genotypes GG, GT and TT in the rs10402876 locus were detected. A total of 98. 94 percent of samples were genotyped. There were no significant differences in genotype frequencies (χ2 =0. 346, P=0. 841 ) and allele frequencies (χ2 =0. 101,P=0. 751) of rs10402876 between the two groups. However, genotype and allele frequencies of the rs366510 locus were significantly different (χ2 = 9.759, P=0. 008, Bonferroni correction,P= 0. 016; χ2 = 5. 294, P= 0. 021, Bonferroni correction, P = 0. 042, respectively). Compared with genotypes GG+GT, genotype TT of rs366510 significantly increased the risk of asthma, with the odds ratio of 1. 471 (95 % confidence interval 1. 125-1. 923). Conclusion These results suggest that C3 gene could be associated with adult asthma of Han population in southern China.     

霍乱弧菌菌体蛋白双向电泳技术的建立

目的建立霍乱弧菌全菌体蛋白的双向电泳技术，获得分辨度高、重复性好的双向电泳图谱。方法利用适当的裂解液处理霍乱弧菌，提取全菌蛋白；采用pH梯度等电聚焦对全菌蛋白进行双向电泳；考马斯亮蓝染色后获得的双向电泳图谱，并利用ImageMaster 2D Elite5．0图象分析软件进行分析，所得的数据用SPSS15．0进行统计分析。结果得到了（1081±16）个蛋白斑点，蛋白主要集中在pI4．24～7．20之间，重复胶的匹配点数为（1057±28），匹配率为97．85％。结论建立了霍乱弧菌全菌双向电泳分析方法，2-DE图谱中蛋白位点的分辨率和重复性非常高，获得了较为理想、清晰的双向电泳图谱，为进一步研究其蛋白质组学奠定了基础。     

Comparative proteomic analysis of Vibrio cholerae O139, O22, O155 and El Tor biotype epidemic strains

Cholera ,as one of the most severe epidemic dis-eases inthe world,can occurin a short time ,andspread quicklyto a wide region.Until 1992 ,onlyV.choleraeserogroup O1 was recognized as thecause of epidemic cholera . However in October1992 ,a major outbreak of a cholera-like illnesscaused by a newserogroupstrain ofV.choleraee-mergedinIndia and Bangladesh.In contrast to allpreviously reported non-O1 strains , which induceonly sporadic cases of human diarrhea without epi-demic potential ,the new…     

原位PCR检测霍乱弧菌ctxAB基因

目的　为监测环境中的霍乱弧菌 ,建立原位PCR(insituPCR ,ISPCR)检测方法。方法纯培养的霍乱弧菌为实验材料 ,霍乱毒素基因 (ctxAB)为靶序列。 4 %多聚甲醛固定细胞 ,1mg/ml溶菌酶消化 2 0min ,PCR反应体系中加入 2 .5 %甘油 ,以荧光素标记的引物为标示物 ,在液相环境下 ,进行靶序列的ISPCR。结果　经蓝光激发 ,荧光显微镜下有扩增产物的细菌发出明亮的绿色荧光 ,阴性对照则无荧光。结论　由于ISPCR既能检测靶序列 ,又保护了细菌形态 ,可以在检测中省去细菌培养的过程 ,因此 ,为快速而准确的检测环境中霍乱弧菌提供了一种新方法     

霍乱弧菌LPS诱导小鼠腹腔巨噬细胞产生TNF的研究

本研究采用霍乱弧菌古典生物型５６９Ｂ菌株及ＥＩ-Ｔｏｒ生物型菌株，以Ｗｅｓｔｐｈａｌ的热酚-水法及高速离心等方法提取ＬＰＳ，血凝法测其效价，并比较不同菌株的ＬＰＳ刺激小鼠腹腔巨噬细胞产生ＴＮＦ的情况。实验表明５６９Ｂ菌株ＬＰＳ血凝效价较高，诱导小鼠腹腔巨噬细胞产生ＴＮＦ的能力较强。     

霍乱弧菌毒力表达调控基因toxR缺失株的构建及其功能的研究

目的　通过构建霍乱弧菌toxR基因缺失株来研究toxR基因对霍乱弧菌减毒菌株IEM101和高产毒株569B毒力表达的调控作用。方法　采用自杀性质粒和接合转移技术,将2个中间含有四环素基因的toxR基因分别与霍乱弧菌减毒株IEM101和高产毒株569B染色体toxR基因重组,从而获得toxR基因缺失株IEM101-4和569B-43,并对2个toxR基因缺失株和其原出发菌株的霍乱肠毒素的产率和主要外膜蛋白图谱进行比较。结果　采用GM1-ELISA检测受测菌CT基因表达,toxR基因缺失株569B-43的P/N值为1.82,而其原出发菌株569B的P/N为4.52,而IEM101和其toxR基因缺失株的P/N值均低于2。采用SDS-PAGE对受试菌外膜蛋白进行分析,toxR基因缺失株569B和IEM101的外膜蛋白图谱相比,均多出2条相对分子质量（Mr）为40×103和43×103外膜蛋白区带。结论　toxR蛋白是霍乱肠毒素基因ctx表达的正调控因子,是霍乱弧菌主要外膜蛋白（Mr为40×103和43×103)编码基因的负调控因子。     

应用环介导等温扩增法快速检测O139群霍乱弧菌

目的 建立一种适合基层检验部门及小型实验室使用的快速检测O139群霍乱弧菌的方法.方法 应用环介导等温扩增技术(loop-mediated isothermal amplification,LAMP),针对O139霍乱弧菌wbfR基因设计4条引物(2条内引物、2条外引物);优化LAMP反应条件和反应体系,对反应体系中的引物、dNTP、Mg2+/Mn2+离子及Calcium等浓度进行优化;并对13株种系背景明确的霍乱弧菌不同实验对照株、30株O139群霍乱弧菌地方分离株、10株O1群霍乱弧菌地方分离株、32株其他肠道菌进行检测,验证该方法的特异性;通过肉眼目测或电泳检测比较结果.结果 所有O139群霍乱弧菌经LAMP榆测均呈绿色并电泳有阶梯状条带为阳性,O1群霍乱弧菌及其他肠道菌均检测呈橙色并电泳无相应条带为阴性;该体系最低检测限为63 CFU/反应;检测结果在白光下通过肉眼即可判断;从菌株核酸的提取至检测完成仅需1.5 h左右.结论 本研究建立的LAMP方法能够快速、灵敏、特异地检测O139群霍乱弧菌,无需昂贵的仪器,简单方便,非常适合基层检验部门或小型实验室以及流行病学人员于应急车上或现场监测等使用,值得推广.     

应用环介导等温扩增法快速检测O139群霍乱弧菌

目的 建立一种适合基层检验部门及小型实验室使用的快速检测O139群霍乱弧菌的方法.方法 应用环介导等温扩增技术(loop-mediated isothermal amplification,LAMP),针对O139霍乱弧菌wbfR基因设计4条引物(2条内引物、2条外引物);优化LAMP反应条件和反应体系,对反应体系中的引物、dNTP、Mg2+/Mn2+离子及Calcium等浓度进行优化;并对13株种系背景明确的霍乱弧菌不同实验对照株、30株O139群霍乱弧菌地方分离株、10株O1群霍乱弧菌地方分离株、32株其他肠道菌进行检测,验证该方法的特异性;通过肉眼目测或电泳检测比较结果.结果 所有O139群霍乱弧菌经LAMP榆测均呈绿色并电泳有阶梯状条带为阳性,O1群霍乱弧菌及其他肠道菌均检测呈橙色并电泳无相应条带为阴性;该体系最低检测限为63 CFU/反应;检测结果在白光下通过肉眼即可判断;从菌株核酸的提取至检测完成仅需1.5 h左右.结论 本研究建立的LAMP方法能够快速、灵敏、特异地检测O139群霍乱弧菌,无需昂贵的仪器,简单方便,非常适合基层检验部门或小型实验室以及流行病学人员于应急车上或现场监测等使用,值得推广.     

Vibrio cholerae non-O1,non-O139 isolated from pleural effusion following total gastrectomy

We isolated non-O1, non-O139 Vibrio cholerae from pleural effusion in a patient with recurred advanced gastric cancer after total gastrectomy. We also recovered the organism from the patient's stool culture. The patient did not experience gastrointestinal symptoms such as diarrhea except heartburn and epigastric discomfort from stomach cancer before admission. The suspected route of infection is directly from the gastrointestinal tract through the previous surgical wounds. After antibiotic treatment, no more V. cholerae was isolated and the patient was well discharged from the hospital. This is the first report of V. cholerae infection associated with pleural effusion in a long-term latent carrier of the organism.     

应用环介导等温扩增法快速检测O139群霍乱弧菌

目的 建立一种适合基层检验部门及小型实验室使用的快速检测O139群霍乱弧菌的方法.方法 应用环介导等温扩增技术(loop-mediated isothermal amplification,LAMP),针对O139霍乱弧菌wbfR基因设计4条引物(2条内引物、2条外引物);优化LAMP反应条件和反应体系,对反应体系中的引物、dNTP、Mg2+/Mn2+离子及Calcium等浓度进行优化;并对13株种系背景明确的霍乱弧菌不同实验对照株、30株O139群霍乱弧菌地方分离株、10株O1群霍乱弧菌地方分离株、32株其他肠道菌进行检测,验证该方法的特异性;通过肉眼目测或电泳检测比较结果.结果 所有O139群霍乱弧菌经LAMP榆测均呈绿色并电泳有阶梯状条带为阳性,O1群霍乱弧菌及其他肠道菌均检测呈橙色并电泳无相应条带为阴性;该体系最低检测限为63 CFU/反应;检测结果在白光下通过肉眼即可判断;从菌株核酸的提取至检测完成仅需1.5 h左右.结论 本研究建立的LAMP方法能够快速、灵敏、特异地检测O139群霍乱弧菌,无需昂贵的仪器,简单方便,非常适合基层检验部门或小型实验室以及流行病学人员于应急车上或现场监测等使用,值得推广.