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Rapid quantification of semen hepatitis B virus DNA by real-time polymerase chain reaction 被引量:25
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作者 Wei-Ping Qian Yue-Qiu Tan +7 位作者 Ying Chen Ying Peng Zhi Li Guang-Xiu Lu Made C. Liu Hsiang-Fu Kung Ming-Ling He Li-Ka Shing 《World Journal of Gastroenterology》 SCIE CAS CSCD 2005年第34期5385-5389,共5页
AIM: To examine the sensitivity and accuracy of real-time polymerase chain reaction (PCR) for the quantification of hepatitis B virus (HBV) DNA in semen. METHODS: Hepatitis B viral DNA was isolated from HBV carr... AIM: To examine the sensitivity and accuracy of real-time polymerase chain reaction (PCR) for the quantification of hepatitis B virus (HBV) DNA in semen. METHODS: Hepatitis B viral DNA was isolated from HBV carriers' semen and sera using phenol extraction method and QIAamp DNA blood mini kit (Qiagen, Germany). HBV DNA was detected by conventional PCR and quantified by TaqMan technology-based real-time PCR (quantitative polymerase chain reaction (qPCR)). The detection threshold was 200 copies of HBV DNA for conventional PCR and 10 copies of HBV DNA for real time PCR per reaction. RESULTS: Both methods of phenol extraction and QIAamp DNA blood mini kit were suitable for isolating HBV DNA from semen. The value of the detection thresholds was 500 copies of HBV DNA per mL in the semen. The viral loads were 7.5×10^7 and 1.67×10^7 copies of HBV DNA per mL in two HBV infected patients' sera, while 2.14×10^5 and 3.02×10^5 copies of HBV DNA per mL in the semen. CONCLUSION: Real-time PCR is a more sensitive and accurate method to detect and quantify HBV DNA in the semen. 展开更多
关键词 Hepatitis B virus SEMEN real-time polymerase chain reaction Viral load
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Human papillomavirus 16 physical status detection in preinvasive and invasive cervical carcinoma by multiplex real-time polymerase chain reaction 被引量:5
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作者 Ying Zheng Zhilan Peng Jiangyan Lou He Wang 《The Chinese-German Journal of Clinical Oncology》 CAS 2007年第1期72-79,共8页
Objective: To explore an ideal approach for detecting the physical status of HPV-16 in clinic use and to investigate the integrated HPV-16 in CINs and cervical cancer. Methods: Multiplex real-time PCR method was est... Objective: To explore an ideal approach for detecting the physical status of HPV-16 in clinic use and to investigate the integrated HPV-16 in CINs and cervical cancer. Methods: Multiplex real-time PCR method was established to quantify the copy numbers of E2 and E6 genes (E2/E6) for analysis of the physical status of HPV-16 DNA and this assay was compared to Southern blot analysis. HPV-16-containing paraffin-embedded tissues including 49 CINs and 51 cervical squamous cancers were detected using the method. Results: (1) The cutoff ratio of E2/E6 to distinguish pure episomal from mixed HPV-16, was 0.81 in the multiplex real-time PCR; (2) The agreement rate between multiplex real-time PCR and Southern blot was 81.5% (the Kappa statistic was 0.844, P〈0.001); (3) HPV-16 DNA existed in an episomal form in 57.1% and mixed form in 42.9% of CIN I lesions; The concomitant form of HPV-16 (〉70%) constituted the majodty in CIN Ⅱ and CIN Ⅲ; HPV-16 DNA mostly integrated into the host chromosome (s) in squamous cervical cancers (68.6%); (4) The incidence of HPV-16 integration was increased with the degree of cervical lesions; (5) The frequency of pure integrated HPV-16 in stage Ⅱ+Ⅲ (88%) was significantly higher than that in stage Ⅰ (33.3%). Conclusion: (1) Mutiplex real-time PCR provides a rapid, sensitive and reliable method for clinic detection of the physical state of HPV-16 DNA; (2) The integration of the HPV-16 DNA is a very eady and important event in the progression from preinvasive to invasive cervical cancer; (3) The pure integrated status of HPV-16 in cervical cancer may be associated with poor prognosis of cervical cancer, but further study will be needed to prove its prognostic significance. 展开更多
关键词 HPV multiplex real-time polymerase chain reaction INTEGRATION cervical carcinoma
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Expression of cellular fibronectin mRNA in adult periodontitis and peri-implantitis: a real-time polymerase chain reaction study 被引量:1
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作者 Yan-Yun Wu Huan-Huan Cao +2 位作者 Ning Kang Ping Gong Guo-Min Ou 《International Journal of Oral Science》 SCIE CAS CSCD 2013年第4期212-216,共5页
Cellular fibronectin (cFn) is a type of bioactive non-collagen glycoprotein regarded as the main substance used to maintain periodontal attachment. The content of cFn in some specific sites can reflect the progress ... Cellular fibronectin (cFn) is a type of bioactive non-collagen glycoprotein regarded as the main substance used to maintain periodontal attachment. The content of cFn in some specific sites can reflect the progress of periodontitis or peri-implantitis. This study aims to evaluate the expression of cFn messenger RNA (mRNA) in tissues of adult periodontitis and peri-implantitis by real-time fluorescent quantitative polymerase chain reaction (PCR) and to determine its clinical significance. A total of 30 patients were divided into three groups of 10: healthy, adult periodontitis and peri-implantitis. Periodontal tissue biopsies (1 mmx I mmx I mm) from each patient were frozen in liquid nitrogen. Total RNA was extracted from these tissues, and the content, purity and integrity were detected. Specific primers were designed according to the sequence, and the mRNA expression levels of cellular fibronectin were detected by real-time PCR. The purity and integrity of the extracted total RNA were both high, and the specificity of amplified genes was very high with no other pollution. The mRNA expression of cFn in the adult periodontitis group (1.526+0.441) was lower than that in the healthy group (3.253+0.736). However, the mRNA expression of cFn in the peri-implantitis group (3.965+0.537) was significantly higher than that in the healthy group. The difference revealed that although both processes were destructive inflammatory reactions in the periodontium, the pathomechanisms were different and the variation started from the transcription level of the cFn gene. 展开更多
关键词 adult periodontitis cellular fibronectin PERI-IMPLANTITIS real-time polymerase chain reaction
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Real-time polymerase chain reaction for the diagnosis of necrotizing herpes stromal keratitis 被引量:1
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作者 Jun-Xin Ma Lin-Nong Wang +2 位作者 Ru-Xia Zhou Yang Yu Tong-Xin Du 《International Journal of Ophthalmology(English edition)》 SCIE CAS 2016年第5期682-686,共5页
AIM: To design, optimize and validate a rapid,internally controlled real-time polymerase chain reaction(RT-PCR) test for herpes simplex virus(HSV) in the diagnosis of necrotizing herpes stromal keratitis.· M... AIM: To design, optimize and validate a rapid,internally controlled real-time polymerase chain reaction(RT-PCR) test for herpes simplex virus(HSV) in the diagnosis of necrotizing herpes stromal keratitis.· METHODS: Tears alone or together with corneal epithelium scrapings from 30 patients(30 eyes)suspected of necrotizing herpes stromal keratitis were tested for HSV DNA by RT-PCR. The samples were collected during the first visit and then on the subsequent 7, 14, 28, 42, and 56 d. The symptoms of the patients were scored before treatment to determine the correlation between HSV concentration in the corneal epithelium scrapings and clinical scores.·RESULTS: The positive rate(46.4%) in the corneal epithelium group before the therapy was significantly higher than that(13.3%) in the tears group(P =0.006).There were 13 positive HSV patients before the therapy,the concentration of HSV DNA in corneal epithelium scrapings group was significantly higher than that in the tears group(paired t-test, P =0.0397). Multilevel mixedeffects model analysis showed that the difference between the corneal epithelium scrapings group and the tears group was statistically significant(P =0.0049). The Spearman rank correlation analysis indicated a positive correlation between the HSV concentration in the corneal epithelium scrapings and clinical scores before the treatment(r =0.844, P〈 0.0001).· CONCLUSION: RT-PCR appears to be a powerful molecular tool for the diagnosis of necrotizing herpes stromal keratitis. 展开更多
关键词 necrotizingherpes stromal keratitis real-time polymerase chain reaction corneal epithelium scrapings TEARS
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Rapid genotyping of human rotavirus using SYBR green real-time reverse transcription-polymerase chain reaction with melting curve analysis 被引量:1
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作者 Yupin Tong Bonita E Lee Xiaoli L Pang 《World Journal of Virology》 2015年第4期365-371,共7页
AIM: To develop a real-time reverse transcriptionpolymerase chain reaction(RT-PCR) assay to genotype rotavirus(G and P) in Alberta from January 2012 to June 2013. METHODS: We developed and validated a different approa... AIM: To develop a real-time reverse transcriptionpolymerase chain reaction(RT-PCR) assay to genotype rotavirus(G and P) in Alberta from January 2012 to June 2013. METHODS: We developed and validated a different approach to perform rotavirus G and P genotyping using a two-step SYBR green RT-PCR(rt-g PCR) by selecting genotype-specific primers of published conventional RT nested PCR(cn RT-PCR) assay and optimizing the amplification conditions. c DNA was first synthesized from total RNA with Super Script? Ⅱ reverse transcriptase kit followed by amplication step using monoplex SYBR green real-time PCR. After the PCR reaction, melting curve analysis was used to determine specific genotype. Sixteen samples previously genotyped using cn RT-PCR were tested using the new assay and the genotyping results were compared as sensitivity analysis. Assay specificity was evaluated by testing other gastroenteritis viruses with the new assay. The amplicon size of each available genotype was determined by gelelectrophoresis and DNA sequences were obtained using Sanger-sequencing method. After validation and optimization, the new assay was used to genotype 122 pediatric clinical stool samples previously tested positive for rotavirus using electron microscopy between January2012 and June 2013.RESULTS: The new rt-g PCR assay was validated and optimized. The assay detected G1 to G4, G9, G12 and P[4] and P[8] that were available as positive controls in our laboratory. A single and clear peak of melting curve was generated for each of specific G and P genotypes with a Tm ranging from 80 ℃ to 82 ℃. The sensitivity of rt-g PCR was comparable to cn RT-PCR with 100% correlation of the 16 samples with known G and P genotypes. No cross reaction was found with other gastroenteritis viruses. Using the new rt-g PCR assay, genotypes were obtained for 121 of the 122 pediatric clinical samples tested positive for rotavirus: G1P[8](42.6%), G2P[4](4.9%), G3P[8](10.7%), G9P[8](10.7%), G9P[4](6.6%), G12P[8](23.0%), and unknown GP[8](0.8%). For the first time, G12 rotavirus strains were found in Alberta and G12 was the second most common genotype during the study period. Gel electrophoresis of all the genotypes showed expected amplicon size for each genotype. The sequence data of the two G12 samples along with other genotypes were blasted in NCBI BLAST or analyzed with Rota C Genotyping tool(http://rotac.regatools.be/). All genotyping results were confirmed to be correct.CONCLUSION: rt-g PCR is a useful tool for the genotyping and characterization of rotavirus. Monitoring of rotavirus genotypes is important for the identification of emerging strains and ongoing evaluation of rotavirus vaccination programs. 展开更多
关键词 ROTAVIRUS A Melting temperature real-time polymerase chain reaction SYBR green GENOTYPING
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Primary application of a real-time quantitative polymerase chain reaction for the detection of human breast cancer related novel gene-Metadherin expression 被引量:1
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作者 Bing Li Zhaozhe Liu Xiaodong Xie Yakun Wang 《The Chinese-German Journal of Clinical Oncology》 CAS 2010年第6期316-320,共5页
Objective:The aim of this study was to detect the expression level of Metadherin (MTDH) in peripheral blood of the breast cancer patients by real-time fluorescence quantitative polymerase chain reaction (PCR),and to e... Objective:The aim of this study was to detect the expression level of Metadherin (MTDH) in peripheral blood of the breast cancer patients by real-time fluorescence quantitative polymerase chain reaction (PCR),and to explore the relationship between expression of Metadherin gene in the patients peripheral blood and the clinic-pathological features in breast cancer. Methods:Real-time fluorescence quantitative polymerase chain reaction was employed to determine the expression level of Metadherin gene in 80 peripheral blood samples of breast cancer patients and healthy donors. Results:The expression of Metadherin gene in breast cancer patients peripheral blood were positive,in which 34 breast cancer patients were highly expressed,accounting for 55.7%,while the expression of Metadherin gene in normal females peripheral blood were negative,there was statistical significance (Ratio = 2.02±0.81,P < 0.05); Ratio of the Metadherin expression in breast cancer patients peripheral blood and the glyceraldehyde-3-phosphate dehydrogenase expression was 1.15 ± 0.36. REST software analysis showed that the expression of Metadherin gene was significantly up-regulated in breast cancer. Conclusion:The SYBR Green I quantitative real-time polymerase chain reaction method can successfully detect the expression level of Metadherin gene. Expression level of Metadherin gene in breast cancer patients peripheral blood is closely related to survival,and it maybe involved in the development of breast cancer and used as an indicator of prognosis. 展开更多
关键词 breast cancer Metadherin (MTDH) real-time fluorescence quantitative polymerase chain reaction (PCR)
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Analysis of hepcidin expression: In situ hybridization and quantitative polymerase chain reaction from paraffin sections 被引量:1
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作者 Yuhki Sakuraoka Tokihiko Sawada +4 位作者 Takayuki Shiraki Kyunghwa Park Yuhichiro Sakurai Naohisa Tomosugi Keiichi Kubota 《World Journal of Gastroenterology》 SCIE CAS CSCD 2012年第28期3727-3731,共5页
AIM: To establish methods for quantitative polymerase chain reaction (PCR) for hepcidin using RNAs isolated from paraffin-embedded sections and in situ hybridization of hepatocellular carcinoma (HCC). METHODS: Total R... AIM: To establish methods for quantitative polymerase chain reaction (PCR) for hepcidin using RNAs isolated from paraffin-embedded sections and in situ hybridization of hepatocellular carcinoma (HCC). METHODS: Total RNA from paraffin-embedded sections was isolated from 68 paraffin-embedded samples of HCC. Samples came from 54 male and 14 female patients with a mean age of 66.8 ± 7.8 years. Quantitative PCR was performed. Immunohistochemistry and in situ hybridization for hepcidin were also performed. RESULTS: Quantitative PCR for hepcidin using RNAs isolated from paraffin-embedded sections of HCC was performed successfully. The expression level of hepcidin mRNA in cancer tissues was significantly higher than that in non-cancer tissues. A method of in situ hybridization for hepcidin was established successfully, and this demonstrated that hepcidin mRNA was expressed in non-cancerous tissue but absent in cancerous tissue. CONCLUSION: We have established novel methods for quantitative PCR for hepcidin using RNAs isolated from paraffin-embedded sections and in situ hybridization of HCC. 展开更多
关键词 HEPCIDIN EXPRESSION In situ hybridization IMMUNOHISTOCHEMISTRY real-time polymerase chain reaction
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Identifying the stability of housekeeping genes to be used for the quantitative real-time PCR normalization in retinal tissue of streptozotocin-induced diabetic rats
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作者 Muhammad Zulfiqah Sadikan Nurul Alimah Abdul Nasir +2 位作者 Mohammad Johari Ibahim Igor Iezhitsa Renu Agarwal 《International Journal of Ophthalmology(English edition)》 SCIE CAS 2024年第5期794-805,共12页
AIM:To investigate the stability of the seven housekeeping genes:beta-actin(ActB),glyceraldehyde-3-phosphate dehydrogenase(GAPDH),18s ribosomal unit 5(18s),cyclophilin A(CycA),hypoxanthine-guanine phosphoribosyl trans... AIM:To investigate the stability of the seven housekeeping genes:beta-actin(ActB),glyceraldehyde-3-phosphate dehydrogenase(GAPDH),18s ribosomal unit 5(18s),cyclophilin A(CycA),hypoxanthine-guanine phosphoribosyl transferase(HPRT),ribosomal protein large P0(36B4)and terminal uridylyl transferase 1(U6)in the diabetic retinal tissue of rat model.METHODS:The expression of these seven genes in rat retinal tissues was determined using real-time quantitative reverse transcription polymerase chain reaction(RT-qPCR)in two groups;normal control rats and streptozotocininduced diabetic rats.The stability analysis of gene expression was investigated using geNorm,NormFinder,BestKeeper,and comparative delta-Ct(ΔCt)algorithms.RESULTS:The 36B4 gene was stably expressed in the retinal tissues of normal control animals;however,it was less stable in diabetic retinas.The 18s gene was expressed consistently in both normal control and diabetic rats’retinal tissue.That this gene was the best reference for data normalisation in RT-qPCR studies that used the retinal tissue of streptozotocin-induced diabetic rats.Furthermore,there was no ideal gene stably expressed for use in all experimental settings.CONCLUSION:Identifying relevant genes is a need for achieving RT-qPCR validity and reliability and must be appropriately achieved based on a specific experimental setting. 展开更多
关键词 housekeeping genes stability real-time reverse transcription polymerase chain reaction retinal tissue streptozotocin-induced diabetic rats
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Use of real-time polymerase chain reaction for the diagnosis of Pneumocystis pneumonia in immunocompromised patients: a meta-analysis 被引量:6
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作者 Hanssa Summah ZHU Ying-gang +2 位作者 Matthew E Falagas Evridiki K Vouloumanou QU Jie-ming 《Chinese Medical Journal》 SCIE CAS CSCD 2013年第10期1965-1973,共9页
Background The diagnosis of Pneumocystis pneumonia (PCP) in immunocompromised patients is still challenging today due to the absence of an in vitro culture system and the low diagnostic accuracy of microscopic exami... Background The diagnosis of Pneumocystis pneumonia (PCP) in immunocompromised patients is still challenging today due to the absence of an in vitro culture system and the low diagnostic accuracy of microscopic examinations. Herein, we performed a meta-analysis to evaluate the accuracy of real-time polymerase chain reaction (PCR) in the diagnosis of PCP. Methods We searched Web of Knowledge and Medline from 1990 to May 2010 for studies reporting diagnostic accuracy data regarding the use of real-time PCR in the diagnosis of PCP in immunocompromised patients. Results Ten individual studies were included. Overall, the sensitivity of real-time PCR was 97% (95% CI: 93%-99%); the specificity was 94% (95% CI: 90%-96%). The area under the HSROC curve (95% CO for real-time PCR was 0.99 (0.97-0.99). In a subgroup analysis regarding studies involving HIV patients among the study population, the sensitivity and specificity were 97% (95% CI: 93%-99%) and 93% (95% CI: 89%-96%), respectively. Regarding studies using Bronchoalveolar lavage (BAL) samples only: sensitivity =98% (95% CI: 94%-99%); specificity =93% (95% CI: 89%- 96%), respectively. Regarding studies using microscopy as a reference standard: sensitivity =97% (95% CI: 92%-99%); specificity =93% (95% CI: 88%-96%). However, high between-study statistical heterogeneity was observed in all analyses. Conclusions Real-time PCR has a good diagnostic accuracy and may provide a useful adjunctive tool for the diagnosis of PCP in immunocompromised patients. Further studies are needed in order to identify any differences in the diagnostic performance of real-time PCR in HIV and non-HIV immunocompromised patients. 展开更多
关键词 real-time polymerase chain reaction Pneumocystis pneumonia non-HIV immunocompromised patients HIV-positive
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Real-time Fluorescence PCR Method for Detection of Burkholderia glumae from Rice 被引量:5
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作者 FANG Yuan XU Li-hui TIAN Wen-xiao HUAI Yan YU Shan-hong LOU Miao-miao XIE Guan-lin 《Rice science》 SCIE 2009年第2期157-160,共4页
Burkholderia glumae causing seedling rot and grain rot of rice was listed as a plant quarantine disease of China in 2007. It's quite necessary to set up effective detection methods for the pathogen to manage further ... Burkholderia glumae causing seedling rot and grain rot of rice was listed as a plant quarantine disease of China in 2007. It's quite necessary to set up effective detection methods for the pathogen to manage further dispersal of this disease. The present study combined the real-time PCR method with classical PCR to increase the detecting efficiency, and to develop an accurate, rapid and sensitive method to detect the pathogen in the seed quarantine for effective management of the disease. The results showed that all the tested strains of B. glumae produced about 139 bp specific fragments by the real-time PCR and the general PCR methods, while others showed negative PCR result. The bacteria could be detected at the concentrations of 1×10^4 CFU/mL by general PCR method and at the concentrations below 100 CFU/mL by real-time fluorescence PCR method. B. glumae could be detected when the inoculated and healthy seeds were mixed with a proportion of 1:100. 展开更多
关键词 Burkholderia glumae bacterial grain rot DETECTION real-time fluorescence polymerase chain reaction DCE
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Micro-droplet Digital Polymerase Chain Reaction and Real-Time Quantitative Polymerase Chain Reaction Technologies Provide Highly Sensitive and Accurate Detection of Zika Virus 被引量:7
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作者 Yuan Hui Zhiming Wu +12 位作者 Zhiran Qin Li Zhu Junhe Liang Xujuan Li Hanmin Fu Shiyu Feng Jianhai Yu Xiaoen He Weizhi Lu Weiwei Xiao Qinghua Wu Bao Zhang Wei Zhao 《Virologica Sinica》 SCIE CAS CSCD 2018年第3期270-277,共8页
The establishment of highly sensitive diagnostic methods is critical in the early diagnosis and control of Zika virus(ZIKV)and in preventing serious neurological complications of ZIKV infection. In this study, we esta... The establishment of highly sensitive diagnostic methods is critical in the early diagnosis and control of Zika virus(ZIKV)and in preventing serious neurological complications of ZIKV infection. In this study, we established micro-droplet digital polymerase chain reaction(ddPCR) and real-time quantitative PCR(RT-qPCR) protocols for the detection of ZIKV based on the amplification of the NS5 gene. For the ZIKV standard plasmid, the RT-qPCR results showed that the cycle threshold(Ct) value was linear from 10~1 to 10~8 copy/l L, with a standard curve R^2 of 0.999 and amplification efficiency of 92.203%;however, a concentration as low as 1 copy/l L could not be detected. In comparison with RT-qPCR, the dd PCR method resulted in a linear range of 10~1–10~4 copy/l L and was able to detect concentrations as low as 1 copy/l L. Thus, for detecting ZIKV from clinical samples, RT-qPCR is a better choice for high-concentration samples(above 10~1 copy/l L),while ddPCR has excellent accuracy and sensitivity for low-concentration samples. These results indicate that the ddPCR method should be of considerable use in the early diagnosis, laboratory study, and monitoring of ZIKV. 展开更多
关键词 Zika virus Nucleic acid detection - Micro-droplet digital polymerase chain reaction (ddPCR)real-time fluorescence quantitative polymerase chain reaction (RT-qPCR)
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Comparison of Abbott and Da-an real-time PCR for quantitating serum HBV DNA 被引量:2
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作者 Ning Qiu Rui Li +6 位作者 Jian-Guo Yu Wen Yang Wei Zhang Yong An Tong Li Xue-En Liu Hui Zhuang 《World Journal of Gastroenterology》 SCIE CAS 2014年第33期11762-11769,共8页
AIM: To compare the performance of the Da-an real-time hepatitis B virus (HBV) DNA assay and Abbott RealTime HBV assay.
关键词 Hepatitis B virus Hepatitis B virus DNA quantitation real-time polymerase chain reaction Chronic hepatitis B Antiviral therapy
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双重数字聚合酶链式反应定量检测转基因马铃薯EH92-527-1品系
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作者 孙敏 高宏伟 +3 位作者 王金花 李瑞 张倩 林青宇 《食品安全质量检测学报》 CAS 2024年第12期20-26,共7页
目的建立双重数字聚合酶链式反应(polymerase chain reaction,PCR)精准定量检测转基因马铃薯EH92-527-1品系的方法。方法基于马铃薯内参UGPase基因和EH92-527-1品系外源插入片段旁侧序列,设计合成引物和探针,确定反应体系和反应条件,建... 目的建立双重数字聚合酶链式反应(polymerase chain reaction,PCR)精准定量检测转基因马铃薯EH92-527-1品系的方法。方法基于马铃薯内参UGPase基因和EH92-527-1品系外源插入片段旁侧序列,设计合成引物和探针,确定反应体系和反应条件,建立转基因马铃薯EH92-527-1品系双重数字PCR定量检测方法。对方法的特异性、定量检测范围、定量限、检测准确度进行评估。结果该方法特异性良好,除转基因马铃薯EH92-527-1品系外,其他物种和品系均无扩增;在线性范围内,内参基因和品系特异性基因拷贝数的相对标准偏差值介于0.86%~22.90%,线性决定系数r^(2)>0.99;品系特异性基因的定量限为3拷贝;不同浓度样品EH92-527-1品系含量测定值与真实值之间的偏差分别为1.54、4.92和–1.31。结论方法具有良好的重复性和准确度,可以用于进出口产品中转基因马铃薯EH92-527-1成分的定性定量检测。该方法的建立对于转基因马铃薯及其制品的监控监管、安全评价和风险预警具有重要意义。 展开更多
关键词 转基因马铃薯 双重数字聚合酶链式反应 定量检测
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实时荧光定量PCR定量方法研究进展 被引量:17
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作者 廉红霞 高腾云 +2 位作者 傅彤 孙宇 李改英 《江西农业学报》 CAS 2010年第10期128-129,132,共3页
实时荧光定量PCR以其特异性强、灵敏度高、重复性好、定量准确、速度快、全封闭反应等优点而成为了分子生物学研究中的重要工具,综述了实时荧光定量PCR技术及其定量方法的研究进展,并展望了其应用前景。
关键词 实时荧光定量 PCR技术 定量方法 研究进展 polymerase chain reaction QUANTITATIVE real-time Method of 分子生物学研究 应用前景 特异性强 灵敏度高 封闭反应 重复性 速度 工具
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转基因玉米59122品系的特异性检测 被引量:8
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作者 许文涛 杨蓉 +4 位作者 陆姣 张南 罗云波 何景 黄昆仑 《食品科学》 EI CAS CSCD 北大核心 2011年第4期139-142,共4页
使用反向聚合酶链式反应(PCR)技术克隆了转基因玉米59122的外源基因与玉米基因组之间的两段侧翼序列,并据其左侧侧翼序列设计了具品系特异性的引物,运用半巢式PCR技术建立了59122的品系特异性二重PCR检测方法,扩增片段100bp,横跨pat终... 使用反向聚合酶链式反应(PCR)技术克隆了转基因玉米59122的外源基因与玉米基因组之间的两段侧翼序列,并据其左侧侧翼序列设计了具品系特异性的引物,运用半巢式PCR技术建立了59122的品系特异性二重PCR检测方法,扩增片段100bp,横跨pat终止子与转基因玉米侧翼基因之间。以转基因玉米59122、MON863、MON810、GA21、NK603,转基因大豆Roundup Ready和转基因油菜GT73等为材料,证明本方法与其他转基因作物具有高特异性。本方法在检测59122时,确定出连接体系中线性DNA的最佳质量浓度为1ng/μL左右,检出限达到0.1%,灵敏度为38个单倍体基因组拷贝数。因此可准确、快速、高效地检测转基因玉米及其产品,或作为常规PCR定性检测后的验证方法。 展开更多
关键词 转基因作物 品系特异性检测 半巢式聚合酶链式反应 反向聚合酶链式反应 二重聚合酶链式反应
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复合式蝎形引物实时定量检测端粒酶延伸产物 被引量:7
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作者 黄艳萍 孔德明 +2 位作者 张晓滨 沈含熙 宓怀风 《化学学报》 SCIE CAS CSCD 北大核心 2004年第3期274-278,共5页
针对端粒酶延伸产物中靶基因序列的特殊性 ,开发了一种可产生荧光的复合式蝎形引物 ,该引物的 5′端带有可特异性检测靶基因的探针序列 ,PCR阻断剂将其与引物序列连接 .当复合式蝎形引物延伸 ,探针序列与同一分子内的靶基因杂交 ,荧光... 针对端粒酶延伸产物中靶基因序列的特殊性 ,开发了一种可产生荧光的复合式蝎形引物 ,该引物的 5′端带有可特异性检测靶基因的探针序列 ,PCR阻断剂将其与引物序列连接 .当复合式蝎形引物延伸 ,探针序列与同一分子内的靶基因杂交 ,荧光信号产生 .运用该技术 ,建立了定量检测端粒酶延伸产物的实时荧光PCR方法 .该法可在快速PCR循环条件下 ,对 0 .15~ 1.5 0× 10 3 amol/ μL范围内的样品进行定量检测 ,线性相关系数R2 =0 .9992 .该法操作简便 。 展开更多
关键词 复合式蝎形引物 实时检测 定量检测 端粒酶 延伸产物 荧光定量PCR技术 恶性肿瘤 诊断
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基于双重PCR技术的鹿茸及其伪品DNA指纹特征和鉴定 被引量:12
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作者 高丽君 何程远 +7 位作者 李盈诺 巴宏宇 李梓僮 夏薇 李明成 苑广信 张丽华 艾金霞 《吉林大学学报(医学版)》 CAS CSCD 北大核心 2018年第4期839-844,共6页
目的:分析鹿茸线粒体细胞色素b(Cytb)和细胞色素C氧化酶亚基Ⅰ(COⅠ)基因特异性,建立双重PCR技术鉴别鹿茸真伪的分子指纹特征。方法:利用碱变性法提取梅花鹿茸、马鹿茸、驯鹿茸和新西兰鹿茸的基因组DNA,应用引物设计软件Premier 5.0针对... 目的:分析鹿茸线粒体细胞色素b(Cytb)和细胞色素C氧化酶亚基Ⅰ(COⅠ)基因特异性,建立双重PCR技术鉴别鹿茸真伪的分子指纹特征。方法:利用碱变性法提取梅花鹿茸、马鹿茸、驯鹿茸和新西兰鹿茸的基因组DNA,应用引物设计软件Premier 5.0针对Cytb和COⅠ分别设计特异性引物(分别为Cytb 1、2和COⅠ1、2、3),采用单一及双重引物分别进行PCR扩增,筛选特异性强的引物,确定最佳PCR反应条件。结果:采用碱变性法提取的鹿茸基因组DNA片段长度为23 000bp,DNA纯度即A(260)/A(280)为1.80±0.02;应用单一引物进行PCR扩增无法鉴定鹿茸的真伪,而引物Cytb 1和COⅠ1组合后,解链温度为58℃时,梅花鹿茸(吉林、安徽)、马鹿茸均能扩增出395和525bp大小的2个片段,而驯鹿茸和新西兰鹿茸均未能扩增出相应片段;采用该提取方法及最优化的PCR反应条件,对市售样品进行检测,检测结果与实际情况完全一致。结论:双重PCR技术可从分子水平鉴别鹿茸的真伪,该方法特异性高、实用性强,且简便快捷,在鹿茸真伪鉴别方面具有较高的应用价值。 展开更多
关键词 鹿茸 细胞色素B 细胞色素C氧化酶亚基Ⅰ 双重聚合酶链反应 DNA指纹
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副溶血弧菌和溶藻弧菌双重PCR检测方法的建立与初步应用 被引量:5
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作者 刘阳 孔繁德 +2 位作者 徐淑菲 吴德峰 林立 《中国预防兽医学报》 CAS CSCD 北大核心 2012年第8期647-650,共4页
为建立同时快速检测海产品中的副溶血弧菌(VP)和溶藻弧菌(VA)的双重PCR方法,本研究根据VP和VA的toxR基因序列设计针对这两种细菌的两对特异性引物,建立能够快速同时检测这两种细菌的双重PCR方法,并对该反应体系的特异性和灵敏度进行检... 为建立同时快速检测海产品中的副溶血弧菌(VP)和溶藻弧菌(VA)的双重PCR方法,本研究根据VP和VA的toxR基因序列设计针对这两种细菌的两对特异性引物,建立能够快速同时检测这两种细菌的双重PCR方法,并对该反应体系的特异性和灵敏度进行检测。结果显示纯培养细菌VP和VA的检测灵敏度分别为2.32×103cfu/mL和2.56×103cfu/mL,临床病料检测灵敏度分别为2 cfu和3 cfu;与枸橼酸杆菌、沙门氏菌、美人鱼弧菌、霍乱弧菌、麦氏弧菌无交叉反应。研究表明本实验方法操作简便快速、特异性强、灵敏度高、稳定性好,并且经济实惠,值得推广应用。 展开更多
关键词 副溶血弧菌 溶藻弧菌 双重PCR
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嗜肺军团菌与非嗜肺军团菌所致社区获得性肺炎的临床对比分析 被引量:9
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作者 金建敏 张沪生 陈东宁 《首都医科大学学报》 CAS 2008年第3期348-353,共6页
目的探讨嗜肺军团菌与非嗜肺军团菌感染所致社区获得性肺炎的临床特点,提高对军团菌肺炎的认识。方法采用双重聚合酶链反应(DPCR)法对根据临床表现及血清抗体结果,临床诊断为军团菌肺炎患者的痰标本进行军团菌DNA检测。选择痰DPCR和血... 目的探讨嗜肺军团菌与非嗜肺军团菌感染所致社区获得性肺炎的临床特点,提高对军团菌肺炎的认识。方法采用双重聚合酶链反应(DPCR)法对根据临床表现及血清抗体结果,临床诊断为军团菌肺炎患者的痰标本进行军团菌DNA检测。选择痰DPCR和血清抗体结果呈一致阳性的患者并根据检测结果将其分为嗜肺军团菌肺炎组(42例)和非嗜肺军团菌肺炎组(18例)。将2组患者的临床资料进行对比分析。结果痰标本DPCR结果与血清特异性抗体结果呈一致阳性,嗜肺军团菌肺炎与非嗜肺军团菌肺炎诊断明确。嗜肺军团菌肺炎多发于既往体健的青壮年,主要发病于夏秋季;非嗜肺军团菌倾向于四季散发,多发于有基础疾病的老年人。与非嗜肺军团菌肺炎相比,嗜肺军团菌肺炎患者的肺脏受累面积较大,胸腔积液及ARDS发病率高,同时全身感染中毒症状和肺外表现更为明显(P<0.05)。结论嗜肺与非嗜肺军团菌感染所致社区获得性肺炎临床特点有所不同,早期予大环内酯类/喹诺酮类抗生素治疗是改善预后的关键手段。 展开更多
关键词 社区获得性肺炎 嗜肺军团菌 非嗜肺军团菌 双重聚合酶链反应
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马铃薯、番茄内源基因PCR检测引物设计及特异性分析 被引量:3
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作者 才华 栾凤侠 +2 位作者 关学佳 朱巍 白月 《食品科学》 EI CAS CSCD 北大核心 2011年第22期192-195,共4页
对马铃薯UDP-葡萄糖焦磷酸化酶基因(UGPase,U20345)和番茄多聚半乳糖醛酸酶-2a基因(PG-2a,X04583.1)进行序列相似性分析和多序列比对,确定特异片段,设计特异引物,经聚合酶链式反应(polymerase chain reaction,PCR)检测,引物具有较高的... 对马铃薯UDP-葡萄糖焦磷酸化酶基因(UGPase,U20345)和番茄多聚半乳糖醛酸酶-2a基因(PG-2a,X04583.1)进行序列相似性分析和多序列比对,确定特异片段,设计特异引物,经聚合酶链式反应(polymerase chain reaction,PCR)检测,引物具有较高的特异性;同时建立利用双重PCR检测马铃薯和番茄混合成分的方法,当马铃薯和番茄DNA混合质量为1.25ng时,仍可对其成分进行可靠的鉴定。新设计的马铃薯和番茄内源基因的引物及建立的双重PCR检测方法具有一定的特异性和灵敏性,适于出入境检验检疫部门对马铃薯和番茄制品进行检测。 展开更多
关键词 马铃薯 番茄 内源基因特异引物 UGPASE PG-2a 双重PCR
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