单核细胞增生李斯特菌质粒DNA参考物质的研制
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(1.南方医科大学检验与生物技术学院,广东 广州 510515;2.广州海关检验检疫技术中心,广东 广州 510623)

作者简介:

陈瑶 女 副教授 研究方向为感染性疾病病原体检测 E-mail:yaoc@i.smu.edu.cn

通讯作者:

许龙岩 男 研究员 研究方向为感染性疾病病原体检验检疫 E-mail:xuly@iqtc.cn

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基金项目:

广东省科技计划项目(2017A040405043);国家标准样品研复制计划项目(S2019154)


Preparation of plasmid DNA reference material for Listeria monocytogenes Preparation of plasmid DNA reference material for Listeria monocytogenes
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(1.School of Laboratory and Biotechnology, Southern Medical University, Guangdong Guangzhou 510515, China;2.Inspection and Quarantine Technology Center (IQTC), Guangdong Guangzhou 510623, China)

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    摘要:

    目的 研制一种能够用于快速鉴定单核细胞增生李斯特菌(以下简称单增李斯特菌)的质粒DNA标准物质。 方法 设计一种质粒DNA包含目前常用于单增李斯特菌检测的hlyA、plcB、inlA基因,并对其稳定性、均匀性和量值可追溯性进行评价。评估其在实时定量聚合酶链式反应(PCR)检测中的适用性。 结果 质粒DNA参考物质的最终定值结果为29.85 μg/mL。该质粒DNA参考物质量值可靠,均匀性和稳定性良好,可以在-20 ℃下保存1年以上。质粒DNA参考品在实时荧光PCR检测中的适用性证明,可以保证实时定量PCR检测结果与单增李斯特菌基因组DNA参考品具有可比性。 结论 研制的质粒DNA标准物质可以替代单增李斯特菌基因组DNA对单增李斯特菌进行质量监控,满足单增李斯特菌检测在实验室质量的有效控制和试验方法验证的需要。 研制一种能够用于快速鉴定单核细胞增生李斯特菌(以下简称单增李斯特菌)的质粒DNA标准物质。方法 设计一种质粒DNA包含目前常用于单增李斯特菌检测的hlyA、plcB、inlA基因,并对其稳定性、均匀性和量值可追溯性进行评价。评估其在实时定量PCR检测中的适用性。结果 质粒DNA参考物质的最终定值结果为29.85 μg/mL。该质粒DNA参考物质量值可靠,均匀性和稳定性良好,可以在-20 ℃下保存1年以上。质粒DNA参考品在实时荧光PCR检测中的适用性证明,可以保证实时定量PCR检测结果与单增李斯特菌基因组DNA参考品具有可比性。结论 研制的质粒DNA标准物质可以替代单增李斯特菌基因组DNA对单增李斯特菌进行质量监控,满足单增李斯特菌检测在实验室质量的有效控制和试验方法验证的需要。

    Abstract:

    Objective To develop a plasmid DNA reference material for rapid and comprehensive identification of Listeria monocytogenes. To develop a plasmid DNA reference material for rapid and comprehensive identification of Listeria monocytogenes.Methods The synthetic DNA fragment contained the hlyA, plcB and inlA, which were currently used for the detection of Listeria monocytogenes, was cloned into vector PUC57 to construct the plasmid reference material (pDNA Listeria). The quantity, homogeneity and stability of pDNA Listeria were evaluated by ultraviolet spectrophotometry (UV). real time quantitative polymerase chain reaction(qPCR) was used to evaluate the applicability of pDNA Listeria. The synthetic DNA fragment contains the hlyA, plcB, and inlA, which currently used for the detection of Listeria monocytogenes, was cloned into vector PUC57 to construct the plasmid reference material (pDNA Listeria ). The quantity, homogeneity and stability of pDNA Listeria were evaluated by ultraviolet spectrophotometry (UV). qPCR was used to evaluate the applicability of pDNA Listeria. Results The results showed that the fixed value of pDNA Listeria was 29.85 μg/mL,which had traceable values, reliable homogeneity and good stability.The pDNA Listeria could be staored at -20 ℃ for more than one year. The pDNA Listeria also provided comparable sensitivity and reliability to the genomic references material. The result showed that the fixed value of pDNA Listeria was 29.85 μg/mL,which had traceable values, reliable homogeneity and good stability.The pDNA Listeria could be staored at -20 ℃ for more than one year.The pDNA Listeria also provides comparable sensitivity and reliability to the genomic references material.Conclusion The pDNA Listeria could be used not only to identify Listeria monocytogenes but also to describe the biological characteristics such as virulence, pathogenicity, and invasiveness of Listeria monocytogenes at the same time. Importantly, the study proved the application of rapidly synthesized multiple targets plasmid serving as qPCR standard for pathogen identification. The pDNA Listeria could be used not only to identify Listeria monocytogenes but also to describe the biological characteristics such as virulence, pathogenicity, and invasiveness of Listeria monocytogenes at the same time. Importantly, the study proves the usefulness of rapidly synthesized multiple targets plasmid serving as qPCR standards for pathogen identification.

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蒲泽南,林晓峰,袁暮云,努色热提·阿布都沙拉木,许龙岩,陈瑶.单核细胞增生李斯特菌质粒DNA参考物质的研制[J].中国食品卫生杂志,2021,33(3):279-284.

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  • 收稿日期:2020-11-25
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  • 在线发布日期: 2021-06-30
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