中国寄生虫学与寄生虫病杂志 ›› 2006, Vol. 24 ›› Issue (3): 6-186.

• 论著 • 上一篇    下一篇

弓形虫韩国KI-1分离株的生物学特性鉴定

林爱芬1,2;申银希2;朴在焕2;韩银泽2;蔡钟一2   

  1. 1温州医学院附属台州医院中心实验室, 临海 317000; 2韩国国立首尔大学寄生虫学和热带医学教研室, 首尔110-799
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2006-06-30 发布日期:2006-06-30
  • 通讯作者: 林爱芬

Biological Characteristics of the Korean Isolate KI-1 of Toxoplasma gondii

LIN Ai-fen1,2;SHIN Eun-hee2;PARK Jae-hwan2;HAN Eun-taek2;CHAI Jong-yil2   

  1. 1 Laboratory Center, Wenzhou Medical College Affiliated Taizhou Hospital, Linhai 317000, China; 2 Department of Parasitology and Tropical Medicine, Seoul National University College of Medicine, Seoul 110-799, Korea
  • Received:1900-01-01 Revised:1900-01-01 Online:2006-06-30 Published:2006-06-30
  • Contact: LIN Ai-fen1

摘要: 目的 研究弓形虫韩国KI-1分离株的生物学特性。 方法 分别将弓形虫韩国KI-1株与国际标准RH株进行下列实验:透射电镜观察虫体的形态,不同浓度的速殖子接种BALB/c小鼠观察其毒力,蛋白质印迹(Western blotting)分析弓形虫抗原与抗弓形虫单抗Tg563和抗新孢子虫单抗12B4反应,PCR-限制性片段长度多态(PCR-RFLP)技术分析其基因型,检测SAG1和ROP1基因编码区的序列。 结果 弓形虫韩国KI-1株的形态、毒力与RH株相似。KI-1和RH抗原仅与抗弓形虫单抗Tg563反应,而不与抗新孢子虫单抗12B4反应。PCR-RFLP技术分析表明,KI-1株属基因型I型弓形虫虫株。KI-1株与RH株相比,SAG1和ROP1基因均各有7个核苷酸及6个氨基酸差异。 结论 KI-1株为基因型I型弓形虫强毒株,与RH株间存在一定的基因差异。

关键词: 弓形虫, 蛋白质印迹法, PCR, 限制性片段长度多态(RFLP), 基因测序

Abstract: Objective To study the biological characteristics of newly isolated Toxoplasma gondii Korean isolate-1 (KI-1). Methods The morphology and infectivity of KI-1 were observed by transmission electron microscopy and animal inoculation. Both RH and KI-1 antigens were detected by an anti-T. gondii monoclonal antibody (mAb), Tg563, and an anti-Neospora caninum mAb, 12B4. The genotype was determined by PCR-RFLP analysis of SAG2 locus. The sequence heterogeneity of the SAG1, ROP1 gene coding regions of the RH and KI-1 was detected by an automated sequencer. Results The morphology and infectivity of KI-1 were similar to those of RH strain. Both RH and KI-1 antigens reacted with Tg563, not with 12B4. In comparison to RH strain, the KI-1 showed a difference of seven positions of nucleotide substitutions and six positions of amino acid substitutions in both SAG1 and ROP1 gene coding regions. Conclusion KI-1 is an isolate of T. gondii with strong virulence. Compared with RH strain, certain genetic differences exist.

Key words: Toxoplasma gondii, Toxoplasma gondiiWestern blotting, PCR, RFLP, Gene sequencing