中国寄生虫学与寄生虫病杂志 ›› 1998, Vol. 16 ›› Issue (5): 380-383.

• 实验研究 • 上一篇    下一篇

核酸原位杂交检测人淋巴结组织中的弓形虫

刘翠梅; 欧阳颗; 谭德明; 张铮   

  1. 湖南医科大学附属湘雅医院传染病教研室
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:1998-10-31 发布日期:1998-10-31

DETECTION OF TOXOPLASMA GONDII DNA IN HUMAN LYMPH NODE TISSUE BY IN SITU HYBRIDIZATION

Liu Cuimei; Ouyang Ke; Tan Deming; Zhang Zheng   

  1. Department of infectious Diseases; Xiang Ya Hospital; Hunan Medical University; Changsha; 410008
  • Received:1900-01-01 Revised:1900-01-01 Online:1998-10-31 Published:1998-10-31

摘要: 目的:探讨弓形虫感染的淋巴结组织中的病原体检测。方法:用聚合酶链反应(PCR)和基因工程技术制备弓形虫(RH株)特异DNA克隆片段,以地高辛随机引物法标记克隆的弓形虫DNA片段作为探针,与淋巴结组织切片中核酸原位杂交试验(ISH)检测病理标本中的弓形虫DNA。结果:32例何杰金淋巴瘤(HD)和41例非何杰金淋巴瘤(NHL)病理标本中各有一例阳性,47例慢性淋巴结炎(CL)病理标本中呈ISH阳性者2例,总阳性率为3.3%(4/120)。研究证明,所制备的探针能检测10pg的DNA,且特异性强。结论:核酸原位杂交为弓形虫病的病理标本中病原体检测提供了可行的方法。

关键词: 弓形虫, 淋巴结组织, 核酸原位杂交

Abstract: AIM: To detect the presence of Toxoplasma gondii in lymph node tissue in patients
with Toxoplasma infection. METHODS: T.gondii ( RH strain ) specific DNA fragment clones were
obtained by using PCR and gene recombination technique. The DNA fragments used as hybridization
probes were labelled with digoxigenin by random primer method. The technique of in situ
hybridization (ISH) was used to detect T.g DNA in the lymph node sections. RESULTS: Four out of 120 samples T. g DNA were found positive, one with Hodgkins disease (HD ) (1/32) , one with non-Hodgkin’s lymphoma (NHL ) (1/41) and 2 with chronic lymphadenitis (CL ) (2/47). The total positive rate was 3.3%. It was demonstrated that this highly specific probe could detect 10 pg of the total RH strain T. g DNA. CONCLUSION: ISH was applicable in detecting pathogens in the lymphnode tissues of individuals with Toxoplasma infection.

Key words: Toxoplasma gondii, lymph node tissue, DNA hybridization in situ