J4 ›› 2014, Vol. 13 ›› Issue (8): 23-25.

• 基础医学 • 上一篇    下一篇

VNTR技术用于大理地区结核分枝杆菌基因分型的研究

  

  1. 大理学院基础医学院,云南大理 671000
  • 收稿日期:2013-12-17 出版日期:2014-08-15 发布日期:2014-08-15
  • 作者简介:董毅,硕士研究生,主要从事感染与免疫学研究.
  • 基金资助:

    国家自然科学基金资助项目(81260456)

A Study of Genotyping in Mycobacterium tuberculosis Strains in Dali by VNTR Technique

  1. Pre-clinical College, Dali University, Dali,Yunnan 671000,China
  • Received:2013-12-17 Online:2014-08-15 Published:2014-08-15

摘要:

目的:应用数目可变串联重复序列(VNTR)分子分型技术,对大理地区60株肺结核临床分离株进行分型研究,探讨大
理地区菌株DNA多态性及基因型特征。方法:采用VNTR分子分型技术对60株结核分枝杆菌3个VNTR位点进行检测,应用
Quantity one软件和BioNumerics 6.6软件进行聚类分析。结果:60株结核分枝杆菌可以分为4个基因群(Ⅰ群、Ⅱ群、Ⅲ群、Ⅳ群),28个基因型。Ⅰ群占15.0%,含有5个基因型,Ⅱ群占31.7%,含有8个基因型,Ⅲ群占40.0%,含有11个基因型,Ⅳ群占13.3%,含有4个基因型。结论:大理地区的结核分枝杆菌存在基因多态性,其主要流行群为Ⅲ群。

关键词: 结核分枝杆菌, 基因分型, 数目可变串联重复序列, 多态性, 大理地区

Abstract:

Objective: To explore DNA polymorphism and genotyping features of strains in Dali by investigating the genotyping in
Mycobacterium tuberculosis clinical isolates in Dali with variable number tandem repeats (VNTR) analysis. Methods: 3 VNTR loci of 60 Mycobacterium tuberculosis strains were tested with VNTR technology and cluster analysis was performed by Quantity one and BioNumerics 6.6. Results: 60 strains were categorized into 4 gene clusters (I, II, III and IV) and 28 genotypes. Cluster I accounted for 15.0% including 5 genotypes; Cluster II, 31.7% including 8 genotypes; Cluster III, 40.0% including 11 genotypes; Cluster IV, 13.3% including 4 genotypes. Conclusion: There was obvious DNA polymorphism of Mycobacterium tuberculosis clinical strains and Cluster III was the predominant prevalent strain in Dali.

Key words: Mycobacterium tuberculosis, genotyping, VNTR, polymorphism, Dali

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