中国寄生虫学与寄生虫病杂志 ›› 1998, Vol. 16 ›› Issue (6): 432-435.

• 论著 • 上一篇    下一篇

我国山丘疫区和平原疫区利什曼原虫分离株基因组DNA基因型分析

吕芳丽1; 胡孝素1; 敬保迁2; 马莹1   

  1. 1 华西医科大学寄生虫学研究室 2 川北医学院寄生虫学教研室
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:1998-12-31 发布日期:1998-12-31

ANALYSIS OF NUCLEAR DNA GENE TYPES OF LEISHMANIA ISOLATES FROM HILLY AND PLAIN FOCI OF CHINA

Lu Fangli 1; Hu Xiaosu 1; Jing Baoqian 2; Ma Ying 1   

  1. 1 Department of Parasitology; West China University of Medical Sciences; Chengdu 610041 2 Department of Microbiology; North Sichuan Medical College; Nanchong 637000
  • Received:1900-01-01 Revised:1900-01-01 Online:1998-12-31 Published:1998-12-31

摘要: 目的:分析我国山丘和平原疫区利什曼原虫分离株基因组DNA(nDNA)的多态性。方法:对基因组DNA进行内切酶酶切、Southern杂交、染色体定位。探针采用地高辛标记。结果:采用gp63探针,显示杜氏利什曼原虫(Leishmaniadonovani,L.d.)江苏人株和L.d.Jeddah nDNA之间有相似的染色体杂交带,L.d.四川人株和L.infantum nDNA之间有相似的染色体杂交带;采用β-tubulin探针,显示L.d.江苏人株与L.d.Jeddah nDNA之间有两条相似的染色体杂交带,L.d.四川犬株与L.d.甘肃犬株nDNA之间有三条相似的染色体杂交带、与L.d.汶川人株nDNA之间有两条相似的染色体杂交带。结论:提示平原疫区的江苏人株与L. d. J eddah 之间存在同源性, 山丘疫区的L. d. 四川人株与L. infantum 之间存在同源性, L. d. 四川犬株与L. d. 甘肃犬株之间存在同源性、与L. d. 汶川人株之间既存在同源性又存在差异, 山丘疫区与平原疫区分离株之间存在异源性。

关键词: 利什曼原虫, 基因组DNA, Southern杂交, 同源性, 异源性

Abstract: AIM: To analyse the nuclear DNA (nDNA) polymorphism of Leishmania isolates from hilly and plain foci of China. METHODS: nDNA were analysed by endonuclease digestion, Southern blotting and chromosomal localization. Probes were labeled with digoxigenin. RESULTS: Using gp63 gene probe, similar hybridization bands were found to be existed between nDNAs of Leishmania donovani Jiangsu human isolate and L.d.Jeddah, also between nDNAs of L.d. Sichuan human isolate and L.infantum. Using β-tubulin gene probe, there were two similar hybridization bands existed between nDNAs of L. d. Jiangsu human isolate and L. d. Jeddah, and three similar hybridization bands existed between nDNAs of L. d. Sichuan canine isolate and L. d. Gansu canine isolate, and two similar hybridization bands existed between nDNA of L. d. Sichuan canine isolate and L. d. Wenchuan human isolate. CONCLUSION: Homology exists between L. d. Jiangsu human isolate and L. d. Jeddah from plain foci, between L. d. Sichuan human isolate from hilly foci and L. infantum, between L. d. Sichuan canine isolate and L. d. Gansu canine isolate from hilly foci. Homology
as well as differences exist between L. d. Sichuan canine isolate and L. d. Wenchuan human
isolate. Heterogeneity exists between isolates from hilly foci and plain foci.

Key words: Leishmania, nDNA, Southern blotting, hilly foci, plain foci, homology, heterogeneity