中国寄生虫学与寄生虫病杂志 ›› 2007, Vol. 25 ›› Issue (1): 11-52.

• 实验研究 • 上一篇    下一篇

粉尘螨2型变应原抗原定位的研究

李盟;包莹;刘志刚   

  1. 深圳大学过敏反应与免疫学研究所, 深圳 518060
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2007-02-28 发布日期:2007-02-28
  • 通讯作者: 刘志刚

Study on the Localization of a Major Allergen Der f 2 by Fluorescence Immunohistochemical Method

LI Meng;BAO Ying;LIU Zhi-gang   

  1. Allergy and Immunology Institute, Shenzhen University, Shenzhen 518060, China
  • Received:1900-01-01 Revised:1900-01-01 Online:2007-02-28 Published:2007-02-28
  • Contact: LIU Zhi-gang

摘要: 目的 研究粉尘螨主要变应原Der f 2在螨体内的定位。 方法 采用免疫荧光抗原定位观察。先制备Der f 2单克隆抗体,再制作粉尘螨石蜡切片。切片经二甲苯脱蜡及梯度乙醇脱水,入3% H2O2 孵育10 min,PBS漂洗后依次加入单克隆抗体血清 37 ℃ 孵育1 h、生物素标记的羊抗鼠IgG抗体(1 ∶ 100)室温孵育60 min、 抗生物素蛋白?鄄生物素过氧化物酶?鄄异硫氰酸荧光素复合物(SABC-FITC)(1 ∶ 100)室温孵育60 min。PBS漂洗,伊文氏蓝处理切片5 min,最后丙三醇封片。用抗重组Der f 2单克隆抗体作一抗孵育,再选用抗鼠IgG荧光抗体为二抗,经荧光染色,观察Der f 2在螨体内的位置。用正常小鼠血清(1 ∶ 100)代替小鼠单克隆抗体血清作为阴性对照。 结果 粉尘螨Der f 2在中肠组织(包括中肠和后肠)和肠内容物均显示较强阳性,特别是肠内容物更明显。 结论 Der f 2分布于粉尘螨的中肠组织及其肠内容物。

关键词: 粉尘螨, 变应原, 抗原定位

Abstract: Objective To localize Der f 2 in the body of Dermatophagoides farinae. Methods Live mites were embedded. Serial mite paraffin sections were made and checked under light microscope. The sections were incubated with anti-recombinant Der f 2 monoclonal antibody as the first antibody. They were then reacted with the fluorescent isothiocyanate conjugated goat anti-mouse IgG as the secondary antibody. The sections were examined with fluorescent light microscopy. Results Der f 2 reacting with immunofluorescent antibodies was found localized in the tissue and contents of the mid-gut of the mite. Conclusion The major allergen Der f 2 distributes in the gut and fecal pellets of Dermatophagoides farinae.

Key words: Dermatophagoides farinae, Der f 2, Allergen localization