检验医学 ›› 2015, Vol. 30 ›› Issue (10): 1017-1020.DOI: 10.3969/j.issn.1673-8640.2015.10.013

• 技术研究与评价·论著 • 上一篇    下一篇

多态性微卫星标记技术与重复序列PCR在近平滑念珠菌基因分型中的比较

李贞, 董丹凤, 章黎华, 江岑, 彭奕冰   

  1. 上海交通大学医学院附属瑞金医院检验科,上海 200025
  • 收稿日期:2015-01-12 出版日期:2015-10-30 发布日期:2015-11-04
  • 作者简介:null

    作者简介:李 贞,女,1988年生,硕士,主要从事真菌流行致病及耐药机制研究。

    通讯作者:彭奕冰,联系电话:021-64370045 。

  • 基金资助:
    国家自然基金面上项目(81371873);国家自然基金资助项目(81301462)

Comparison on genotyping of Candida parapsilosis by polymorphic microsatellite marker technology and repetitive sequence-based PCR

LI Zhen, DONG Danfeng, ZHANG Lihua, JIANG Cen, PENG Yibing.   

  1. Department of Clinical Laboratory, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 200025, China
  • Received:2015-01-12 Online:2015-10-30 Published:2015-11-04

摘要: 目的

比较多态性微卫星标记(PMM)技术与重复序列聚合酶链反应(PCR)在近平滑念珠菌基因分型中的应用。

方法

收集2012年3月至2013年11月间上海5家医院临床分离的近平滑念珠菌55株,经内转录间隔区序列分析(ITS)进一步鉴定菌种,共有狭义近平滑念珠菌43株,之后采用重复序列PCR和PMM技术进行基因分型,比较2种分型方法的结果和效率。

结果

43株狭义近平滑念珠菌经重复序列PCR分型只有1种基因型;经PMM技术分型有22种基因型,以Ⅰ型(10株)、Ⅱ型(6株)为主,Ⅲ~Ⅶ型见于2或3株菌,其余15种基因型均只有1株菌。

结论

PMM技术用于狭义近平滑念珠菌的基因分型,分辨率高、重复性好,适用于狭义近平滑念珠菌基因组微进化的监测,而重复序列PCR不适用于狭义近平滑念珠菌的基因分型。

关键词: 近平滑念珠菌, 基因分型, 多态性微卫星标记技术, 重复序列聚合酶链反应

Abstract: Objective

To evaluate the application of polymorphic microsatellite marker(PMM)technology and repetitive sequence-based polymerase chain reaction (PCR) for genotyping of Candida parapsilosis.

Methods

From March 2012 to November 2013, 55 Candida parapsilosis isolates were collected from 5 hospitals in Shanghai, which were further identified as Candida parapsilosis sensu stricto (43 isolates) by amplifying and sequencing with internal transcribed sequence(ITS). All the isolates were genotyped by repetitive sequence-based PCR and PMM technology. Finally, the results and efficacy of these 2 genotyping methods were compared.

Results

The 43 Candida parapsilosis sensu stricto isolates had only 1 genotype by repetitive sequence-based PCR. PMM technology generated 22 genotypes. The major genotypes were Type Ⅰ (10 isolates) and Type Ⅱ (6 isolates), whereas Type Ⅲ-Ⅶ were observed in 2 or 3 isolates. Another 15 genotypes were observed in only 1 isolate.

Conclusions

PMM technology is an effective genotyping method for Candida parapsilosis sensu stricto with high resolution and repeatability, which could be used to determine the micro-evolutionary variations. However, repetitive sequence-based PCR is not suitable for the genotyping of Candida parapsilosis sensu stricto.

Key words: Candida parapsilosis, Genotype, Polymorphic microsatellite marker technology, Repetitive sequence-based polymerase chain reaction

中图分类号: