您现在的位置: 首页> 研究主题> 多聚酶链反应

多聚酶链反应

多聚酶链反应的相关文献在1989年到2019年内共计558篇,主要集中在肿瘤学、内科学、基础医学 等领域,其中期刊论文533篇、会议论文12篇、专利文献166437篇;相关期刊282种,包括中国实验诊断学、传染病信息、中华血液学杂志等; 相关会议11种,包括第十三届中南地区实验动物科技交流会、第14届中国南方国际心血管病学术会议、中国畜牧兽医学会禽病学分会鸡淋巴白血病防控技术研讨会等;多聚酶链反应的相关文献由1626位作者贡献,包括成军、刘妍、王琳等。

多聚酶链反应—发文量

期刊论文>

论文:533 占比:0.32%

会议论文>

论文:12 占比:0.01%

专利文献>

论文:166437 占比:99.67%

总计:166982篇

多聚酶链反应—发文趋势图

多聚酶链反应

-研究学者

  • 成军
  • 刘妍
  • 王琳
  • 陆荫英
  • 李克
  • 张健
  • 张玲霞
  • 梁耀东
  • 袁波
  • 期刊论文
  • 会议论文
  • 专利文献

搜索

排序:

年份

期刊

作者

    • 王警; 张碧成; 郭芸芸; 吴庆侠; 何孔旺; 张雪寒
    • 摘要: 目的 建立多重PCR法检测产志贺毒素性大肠杆菌(shiga toxin-producing Escherichia coli,STEC)主要血清型O26、O145、O45和O121的分析方法.方法 根据GenBank登录序列,设计扩增O抗原翻转酶(wzx)基因的引物,建立PCR方法,并以STECO26、O145、O45和O121基因组为模板,检验多重PCR的灵敏度和特异性.使用建立的PCR,检测牛胴体表面拭子,阳性扩增条带送测序,以验证PCR扩增的可靠性.同时将阳性扩增样品,涂布显色平板,分离靶标血清型细菌.结果 本研究成功建立STEC O26、O145、O45和O121的多重PCR方法,PCR循环参数中退火温度为60°C,扩增片段分别为249、353、890和587 bp.多重PCR直接检测O26、O145、O45和O121时,最低检测限介于103~104 CFU/mL,而增菌后再检测,最低检测限均为1 CFU/mL.多重PCR用于其他血清型STEC,和非大肠杆菌扩增时,均未扩增出目的条带,只有O26、O145、O45和O121能够扩增出相应条带.当使用多重PCR直接检测胴体擦拭子时,阳性率为5.45%(3/55),主要为O26、O145血清型;增菌后检测阳性率为7.27%(4/55),主要为O26、O145和O121血清型.阳性PCR扩增样品,成功分离到O26两株、O145和O121各一株.分离菌株具有典型大肠杆菌的生化特性,携带STEC代表性毒力因子志贺毒素和紧密素,且具有多重耐药性.结论 以STECO26、O145、O45和O121的wzx基因为检测靶标,成功建立多重PCR方法,灵敏度和特异性良好,与细菌分离联合使用,可减少工作量,精准分离目的病原菌.
    • 马雅昌; 朱雅文; 郭健; 杨朝昕; 邱宇辰; 苗伟; 金宇
    • 摘要: 目的 探讨一项新型封闭穿刺活检技术在骨肿瘤诊断中的应用价值.方法 建立兔 VX2 骨肿瘤动物模型,随机分为实验组与对照组,每组18只.实验组采用新型穿刺装置进行肿瘤部位的穿刺检查,穿刺后及时封闭穿刺留下的骨孔;对照组采用传统穿刺活检装置,穿刺后不封闭骨孔,仅按压止血.用彩超检测穿刺后穿刺孔血肿形成情况;应用定量PCR技术检测穿刺通道组织中癌基因血管内皮生长因子(VEGF)基因的表达,进而评估两组穿刺技术引起的肿瘤细胞通道扩散情况.结果 穿刺2h后彩超显示,实验组新型封闭栓均未脱落,其中2只穿刺孔少量出血形成微小血肿,16只穿刺孔周围无明显液体渗出;对照组15只穿刺孔有明显出血形成血肿,仅3只无明显出血;两组穿刺孔出血率比较差异有统计学意义(P<0.05).实验组穿刺针道软组织中VEGF mRNA相对表达量明显低于对照组,差异有统计学意义(P<0.05).结论 该新型封闭穿刺装置和封闭穿刺骨孔器械可有效降低肿瘤穿刺后肿瘤细胞针道扩散,可应用于临床骨肿瘤的诊断.%Objective To investigate the application value of a new closed needle biopsy technique in the diagnosis of bone tumors. Methods The VX2 rabbit bone tumor model was establishd, which was randomly divided into the new puncture technique group (VX2 experimental group) and the control group,each group had 18 rabbits. In the experi-mental group, the new puncture device was used to check the tumor location, and the bone hole was plugged after the puncture. In the control group, the traditional biopsy device was used, and the bone hole was not plugged after the puncture, just only applied the pressure to stop the bleeding. B-ultrasonography was used to detect the formation of hematoma of the puncture hole after the puncture. The quantitative detection PCR was used to detect the expression of oncogene vascular endothelial growth factor gene(VEGF)in needle-path tissue. Then the tumor cell path proliferation of two groups were evaluated and compared. Results The color ultrasonography showed no shedding in the new closed plug of the experimental group after 2 h of puncture, in which 2 cases of mild bleeding of puncture holes oc-curred and micro hematoma was formed, and other 16 cases showed no obvious liquid exudation around the puncture holes. In the control group, it also showed 15 cases of obvious bleeding of puncture holes that formed hematoma, while the remaining 3 cases showed no obvious bleeding. There were significantly statistical differences between the puncture hole bleeding rate of two groups (P<0.05) . The expression of VEGF mRNA in the needle-path soft tissue of the experimental group was significantly lower than that of the control group. The gene expression in needle-path showed there was significantly statistical difference between the two groups (P<0.05) . Conclusions The new type of closed puncture device and closed puncture bone hole device can effectively reduce the tumor cell puncture after tumor cell proliferation, and can be used in the diagnosis of clinical bone tumors.
    • 马雅昌; 郭健; 朱雅文; 杨朝昕; 邱宇辰; 金宇
    • 摘要: 目的 探讨一种新的封闭穿刺活检技术在诊断骨肿瘤中的应用价值.方法 建立兔VX2骨肿瘤动物模型,随机分为新型穿刺技术组(VX2实验组,18只实验兔)与传统穿刺技术组(VX2对照组,18只实验兔),实验组18只采用新型穿刺装置进行肿瘤部位的穿刺检查,穿刺后及时封堵穿刺留下的骨孔;对照组采用传统穿刺活检装置,穿刺后不封堵骨孔,仅行按压止血.采用B超检测穿刺后穿刺孔血肿形成情况,实时荧光定量PCR技术检测穿刺通道及周围组织中癌基因血管内皮生长因子(VEGF)基因的表达,并对穿刺通道及周围组织行病理学检查,进而评估与比较两组穿刺技术引起的肿瘤细胞通道扩散情况.结果 穿刺2h后,B超显示实验组新型封闭栓均未脱落,其中2只(11.1%)穿刺孔少量出血,形成微小血肿,其余16只穿刺孔周围无明显液体渗出;对照组15只(83.3%)穿刺孔有明显出血形成血肿,与实验组穿刺孔出血率比较差异有统计学意义(P<0.05).VX2实验组穿刺通道及周围组织中见VEGF基因表达量明显低于对照组,两组穿刺通道及周围组织VEGF基因表达比较差异有统计学意义(P<0.05),病理学检查VX2实验组穿刺针道软组织中2只发现肿瘤细胞,VX2对照组穿刺针道及周围组织中13只发现肿瘤细胞,两组穿刺通道肿瘤细胞扩散率比较差异有统计学意义(P<0.05).结论 该新型封闭穿刺技术安全,容易操作,可有效降低肿瘤穿刺后肿瘤细胞针道扩散,可应用于临床骨肿瘤的诊断.
    • 刘真君; 贺光明; 董伟; 赵丽丽
    • 摘要: 目的 系统评价脑脊液多聚酶链反应(PCR)对中枢神经系统侵袭性曲霉菌感染的诊断价值.方法 计算机检索PubMed、The Cochrane Library、EMbase、CNKI、WanFang Data、CBM和VIP,查找评估PCR对中枢神经系统侵袭性曲霉菌感染诊断价值的相关研究,检索时限均为从建库至2015年1月10日.由两位评价者按照纳入与排除标准独立筛选文献、提取资料并评价纳入研究的方法学质量后,采用Stata 12.0软件统计并Meta分析,评估异质性及发表偏倚.结果 最终纳入8个研究,共130例病人,确诊/可信病人数为27例(20.8%).针对3篇病例对照及1篇队列研究的Meta分析结果显示:敏感度(Sen)、特异度(Spe)、阳性似然比(+LR)、阴性似然比(-LR)、诊断比值比(DOR)、ROC曲线下面积(AUC)分别为0.984[95%CI(0.796,0.992 )]、0.930[95% CI(0.837,0.971)]、14.09[95% CI(5.87,33.82)]、0.016[95% CI(0.001,0.843)]、847 [95% CI(16,4536)]、0.99[95% CI(0.97,0.99)].但有一定的异质性(I2=37%)和发表偏倚(P=0.095)存在.脑脊液PCR阳性率显著高于脑脊液GM检测(P=0.018)和血PCR检测(P=0.02).结论 脑脊液PCR对中枢神经系统侵袭性曲霉菌感染有较高的诊断价值.但PCR检测方法学上存在异质性,发表偏倚可能高估PCR方法的诊断价值,上述结论仍需谨慎看待.%Objective Systematic review about diagnostic value of cerebrospinal fluid PCR detection for invasive aspergillosis in the central nervous system (CNS).Methods Computer retrieval of PubMed,The Cochrane Library,EMbase,CNKI,Wan Fang Data,CBM and VIP was conducted.Studies published from initiation of the databases until January 10,2015,assessing diagnostic performance of CSF PCR detection for invasive aspergillosis in the central nervous system were searched.Two reviewers independently searched literature on the grounds of inclusion and exclusion standards,extracted information and evaluated methodological quality of included studies.statistical calculation and meta-analysis were conducted via Stata 12.0 software and heterogeneity and publication bias were assessed.Results Totally eight studies were enrolled,with proven/probable 27 cases (20.8%) in 130 patients.Meta-analysis based on 3 case-control studies and 1 cohort study showed:sensitivity (Sen),specific (Spe),positive likelihood ratio (+ LR),negative likelihood ratio (-LR) and diagnostic odds ratio (DOR),the area under the ROC curve (AUC) were 0.984 [95% CI(0.796,0.992)],0.930 [95% CI(0.837,0.971)],14.09 [95% CI(5.87,33.82)],0.016 [95% CI(0.001,0.843)] and 847 [95% CI(16,453 6)],0.99 [95% CI(0.97,0.99)],respectively.But there were moderate heterogeneity (I2 = 37%)and publication bias (P=0.095).PCR positive rate in CSF was significantly higher than that of GM test in CSF(P=0.018) and blood PCR detection (P=0.02).Conclusion PCR test in CSF for invasive aspergillosis of the central nervous system has high diagnostic value.However,due to methodological heterogeneity of PCR detection and possibly overestimated diagnostic performance of PCR by publication bias,aforementioned conclusion must be drawn conscientiously.
    • 陈丽; 徐培; 刘倩; 丁兀兀; 李慧; 段芳蕾; 孟红; 吴宁
    • 摘要: 目的:了解四川省德阳地区宫颈组织中23种人乳头瘤病毒( Human papilloma virus ,HPV)感染情况(亚型分布、单一和混合感染构成以及感染女性年龄分布)。方法对2014年1月至2015年1月在德阳市人民医院体检和就诊的3008例女性的宫颈标本应用多聚酶链反应( polymerase chain reaction ,PCR)-反向点杂交法进行HPV分型检测,并对所得数据进行统计分析。结果3008例标本中,阳性1010例,感染率为33.58%;其中单一感染726例(70.88%),单一高危型感染560例(18.62%),单一低危型感染166例(5.52%),单一感染例数是多重感染的2.56倍;多重感染284例(28.11%),以双重感染为主(69.37%);双重感染中以高危型和高危型混合感染为主(61.42%),而三重及以上感染以高危型和低危型混合感染为主(73.56%);41~50岁年龄段的患者感染最多,但≤20岁和>50岁年龄段的患者组检出阳性率最高。结论德阳地区有较高的HPV感染率,且本地区HPV感染亚型和年龄段分布具有独特的区域特点。本研究结果可为本地区宫颈病变的诊断、治疗,宫颈癌的早期预防和HPV疫苗使用等提供重要的参考依据。%Objective To study 23 kinds of Human Papilloma Virus ( HPV ) infections of cervical tissues in Deyang region ( subtype distributions , single and mixed infections and age distribution of infected women ) .Methods Applying PCR-reverse dot blot to detect the HPV genotyping of 3 008 female cases'cervical specimens , who did physical examinations and treated in the people's hospital of Deyang City from Jan.2014 to Jan.2015, and the resulting data were statistically analyzed .Results In 3 008 cases of specimens, there were 1 010 cases of positive results, and the infection rate was 33.58 %.In which 726 cases belonged to the single infection (70.88 %).The single high -risk accounted for 560 cases, and the infection rate was 18.62 %.The single low -risk accounted for 166 cases, and the infection rate was 5.52 %.The number of the single infection was 2.56 times of the multiple infections.There were 284 cases (28.11 %) of multiple infections in 1 010 cases, and the most of which was the dual infections (69.37 %).In the dual infections,the mixed infections with high -risk and high-risk were dominant (61.42 %), while in the triple infections and more ,the mixed infections with high -risk and low-risk were dominant (73.56%) .The most of patients infected were in the 40~50 age group.However, the highest positive rates were among ≤20 and>50 years old group.Conclusion There was high prevalence of HPV in Deyang region.And the age and subtypes distribution of HPV infection were unique in this region .This study can provide important reference basis for the diagnosis and treatment of the cervical lesions , the prevention of the early cervical cancer and the use of HPV vaccine .
    • 姜黄; 郑丽华; 杨金花
    • 摘要: 目的:探讨多聚酶链反应(PCR)检测免疫球蛋白重链基因重排在原发性胃肠道淋巴组织增生性疾病中的良恶性鉴别中的应用价值。方法选取存档蜡块45例,采用HE常规染色及SP免疫组化方法进行组织学分类,运用PCR半巢式扩增免疫球蛋白重链基因重排,2%琼脂糖凝胶电泳检测PCR产物。结果IgH FR3A和IgH FR3A+FR2A在MALT淋巴瘤的阳性检测率分别为60.7%(17/28)和75.0%(21/28),在DLBCL中的阳性检测率分别为60.0%(9/15)和73.3%(11/15),在MCL中的阳性检测率分别为100.0%(1/1)和100.0%(1/1)。IgH FR3A在胃肠道淋巴瘤中的阳性检测率为60.0%。IgH FR3A联合IgH FR2Ad在胃肠道淋巴瘤中的阳性检出率为73.3%(33/45)。结论采用PCR方法检测免疫球蛋白重链基因重排能够作为淋巴瘤诊断的有效辅助手段,有助于对原发性胃肠道淋巴组织增生性疾病的良恶性做出正确的诊断。%Objective To explore value of polymerase chain reaction (PCR) detecting immunoglobulin heavy chain gene rearrangement in differentiation of benign and malignant of primary gastrointestinal lymphoproliferative disease. Methods 45 paraffin-embedded specimens were selected and they were received histological categories according to HE staining and SP immunohistochemistry. Immunoglobulin heavy chain gene rearrangement was amplified by semi nested PCR. 2%PCR products were detected by agarose gel electrophoresis. Results Positive detective rates of IgH FR3Aand IgH FR3A+FR2A in MALT lymphoma were 60.7%(17/28) and 75.0%(21/28) respectively. Positive detective rates in DLBCL were 60.0%(9/15) and73.3%(11/15) respectively. Positive detective rates in MCL were 100.0%(1/1) and 100.0%(1/1) respectively. Positive detective rate of IgH FR3A in gastrointestinal lymphoma was 60.0%. Positive detective rate of gH FR3Acombined with IgH FR2Ad in gastrointestinal lymphoma was 73.3%(33/45). Conclusion Use of PCR to detect immunoglobulin heavy chain gene rearrangement can be effective assistant method to diagnose lymphoma. It can help to make right diagnosis for differentiation of benign and malignant of primary gastrointestinal lymphoproliferative disease.
    • 宋芳; 冯若鹏; 赵紫薇; 陈晶; 贺帅; 陈小艳
    • 摘要: 目的:探讨孕酮对自然流产小鼠母胎界面白介素(IL)-8的调节作用.方法:建立经典的自然流产小鼠模型(CBA/J×DBA/2交配组合),分为两组,孕酮组注射黄体酮,模型组同步注射等量的生理盐水.另设正常妊娠组小鼠(正常组)对照,每组10只小鼠.用免疫组织化学染色法和反转录-聚合酶链式反应(RT-PCR)技术检测各组小鼠蜕膜及绒毛组织中IL-8蛋白和mRNA的相对表达情况.结果:孕酮组血清孕酮(84.91±10.05ng/ml)水平明显高于模型组(41.83±9.77ng/ml),而IL-8(615.23±213.62pg/ml)水平明显低于模型组(1653.14±321.25pg/ml),差异均有统计学意义(P<0.01);孕酮组血清孕酮、IL-8水平分别与正常组比较,差异均无统计学意义(P>0.05).免疫组织化学染色和RT-PCR在绒毛组织中,孕酮组IL-8蛋白和mRNA(0.067±0.028,61.28±4.13)相对含量均明显低于模型组(0.135±0.012,85.72±2.63),差异均有统计学意义(P<0.01),与正常组(0.059±0.021,58.33±2.87)比较均无统计学意义(P>0.05);在蜕膜组织中,孕酮组IL-8蛋白和mRNA的相对含量低于模型组,差异均有统计学意义(P<0.05),与正常组比较均无统计学意义(P>0.05).结论:孕酮可下调自然流产小鼠母胎界面IL-8的表达.
    • 摘要: 艾滋病(爱滋病)瘢痕(疤痕)白细胞(白血球)巴宾斯基征(巴彬斯基征)低钾血症(低血钾症)铜绿假单胞菌(绿脓杆菌)啰音(罗音)末梢循环(末稍循环)脑梗死(脑梗塞)低氧血症(低血氧症)聚合酶链反应(多聚酶链反应)体层摄片(分层摄片)X线(X光)代偿性月经(倒经)低热(低烧)三酰甘油(甘油三酯)适应证(适应症)异位妊娠(宫外孕)吸光度(光密度)
    • 时伟红; 郑志红
    • 摘要: 目的:建立肿瘤研究常用动物犬和猴病原菌的16s rDNA PCR检测方法。方法:提取犬病原菌布鲁杆菌、空肠弯曲杆菌、小肠结肠炎耶尔森菌和猴病原菌志贺氏菌DNA,经过通用引物扩增,PCR产物为病原菌16s rDNA全长,经纯化后直接测序。利用BLAST软件从GenBank数据库中搜索相关菌株的序列进行序列比对和同源性分析,确定病原菌的种属。结果:测序结果与数据库中搜索到的相关菌株的序列进行序列比对显示,4种病原菌测序分别与布鲁杆菌、空肠弯曲杆菌、小肠结肠炎耶尔森菌和志贺氏菌序列一致。结论:利用16s rDNA PCR方法可快速准确地检测肿瘤研究常用动物犬和猴病原菌,对保证肿瘤研究准确性有重要意义。%Objective:To establish the pathogen detection method in dog and monkey commonly used animal for cancer research. Methods:The DNA of Brucella spp,Campylobaceter jejuni,Yersinia enterocolitica and Shigella spp confirmed by conventional methods were extracted. The full length of 16s rDNA was amplified with a set of universal primers. The PCR products were purified and sequenced directly. The related sequences were obtained from the Gen-Bank database using BLAST search software and the species of the pathogen were identified according to the sequence analysis and homology comparison of the 16s rDNA sequences. Results:The 16s rDNA sequences of the four pathogen were 100% concordance with the known standard nueleotide sequences of Brucella spp,Campylobaceter jejuni, Yersinia enterocolitica and Shigella spp. Conclusion:The PCR method based on 16s rDNA was reliable and could i-dentify dog and monkey the pathogen rapidly and accuracy.
  • 查看更多

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号