中国寄生虫学与寄生虫病杂志 ›› 2003, Vol. 21 ›› Issue (4): 5-213.

• 论著 • 上一篇    下一篇

我国五省美洲钩虫COI基因序列多态性分析

李铁华,郭湘荣,胡铃,肖树华,薛海筹,John Hawdon
  

  1. 中国疾病预防控制中心寄生虫病预防控制所世界卫生组织疟疾、血吸虫病和丝虫病合作中心,卫生部寄生虫病学重点实验室,华盛顿大学医学中心微生物及热带病室,上海 200025
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2003-08-30 发布日期:2003-08-30

Polymorphism Analysis of Cytochrome C Oxidase 1 COI Gene in Necator americanus Collected from 5 Provinces in China

LI Tie-hua,GUO Xiang-rong,HU Ling,XIAO Shu-hua,XUE Hai-chou,John Hawdon
  

  1. Institute of Parasitic Diseases,Chinese Centre for Disease Control and Prevention,WHO Collaborating Centre for Malaria,Schistosomiasis and Filariasis,Shanghai 200025 Department of Microbiology and Tropical Medicine,George Washington University Medical Center
  • Received:1900-01-01 Revised:1900-01-01 Online:2003-08-30 Published:2003-08-30

摘要:   目的测定和比较四川、海南、云南、湖北、江苏五省美洲钩虫细胞色素氧化酶Ⅰ(COI)基因序列,分析基因序列的多态性。方法应用PCR技术扩增美洲钩虫COI基因,并进行DNA测序和分子进化分析。结果五省的美洲钩虫COI基因序列相似性为97%~99%,但在其PCR扩增获得的595bP的COI基因片段上,共检出19个核苷酸位点上的变异,变异位点上转换明显多于颠换,基因序列差异值为1.34%~2.18%。结论五省的美洲钩虫COI基因序列具有很高的相似性,但特定碱基位点仍存在一定差异。

关键词: 美洲钩虫, 细胞色素C氧化酶, 基因差异, 序列分析

Abstract:  Objective To detect and compare the COI gene sequences of Necator americanus collected from the provinces of Sichuan, Hainan, Yunnan, Hubei and Jiangsu, and to analyze the genetic diversity of the geographic isolates. Methods COI genes of N. americanus were amplified from the genomic DNA by PCR and sequenced. Results The COI gene sequences of N. americanus from five provinces were 97%-99% identical over 595 bp, and base variation oc- curred in 19 nucleotide sites in which the transition was more frequent than the transversion. The difference between the se- quences ranged from 1. 34% to 2. 18%. Conclusion The COI gene sequences show high identity among the geographic isolates of N. americanus with some difference at specific nucleotide sites.

Key words: Necator americanus, cytochrome C oxidase 1, genetic diversity, sequence analysis