高等学校化学学报 ›› 1999, Vol. 20 ›› Issue (4): 544.

• 论文 • 上一篇    下一篇

热敏相分离荧光免疫分析乙肝表面抗原的新方法

朱庆枝1, 杨黄浩1, 李东辉2, 许金钩1, 张毅1, 张长弓2   

  1. 1. 教育部材料和生命过程分析科学开放实验室, 厦门大学化学系, 厦门 361005;
    2. 教育部材料和生命过程分析科学开放实验室, 厦门大学抗癌研究中心, 厦门 361005
  • 收稿日期:1998-10-28 出版日期:1999-04-24 发布日期:1999-04-24
  • 通讯作者: 朱庆枝,男,29岁,博士.
  • 作者简介:朱庆枝,男,29岁,博士.
  • 基金资助:

    教育部博士点基金;福建省自然科学基金(No.B9810004)资助课题

Fluorescence Immunoassay for HBsAg Using a Thermal Phase Separating Polymer

ZHU Qing-Zhi1, YANG Huang-Hao1, LI Dong-Hui2, XU Jin-Gou1, ZHANG Yi1, ZHANG Chang-Gong2   

  1. 1. The Research Laboratory of SEDC of Analytical Science for Material and Life Chemistry, Department of Chemistry, Xiamen University, Xiamen, 361005;
    2. The Research Laboratory of SEDC of Analytical Science for Material and Life Chemistry Cancer Research Center, Xiamen University, Xiamen, 361005
  • Received:1998-10-28 Online:1999-04-24 Published:1999-04-24

摘要: 以N-异丙基丙烯酰胺为单体,将水溶性热敏高分子聚异丙基丙烯酰胺(PNIP)和抗体偶联,用异硫氰酸荧光素标记羊抗人乙肝表面抗原抗体,建立了夹心型热敏相分离荧光免疫分析乙肝表面抗原(HBsAg)的新方法.评价了抗体在PNIP上的固定效率和非特异性吸附情况.HBsAg在0.5~100μg/mL范围内与体系荧光强度呈良好的线性关系,检出限为10ng/mLHBsAg.该方法既具有均相免疫分析的快速性,又有固相免疫分析的高灵敏度.用于乙肝病人血清中HBsAg水平的测定,结果令人满意.

关键词: 聚异丙基丙烯酰胺, 热敏相分离, 荧光免疫分析, 乙肝表面抗原

Abstract: Anovel fluorescence immunoassay for HBsAg was developed by using poly-N-iso-propylacrylamide(PNIP) as an immunoreaction carrier. In sandwich immunoassay, after two steps immunoreaction, PNIP precipitates out of water above a critical temperature of 31℃ , enabling a polymer-bound immune complex to be separated from the solution. The calibration graph for HBsAg was linear over the range of 0.5-100 g/mLwith a detection limit of 10ng/mL. This method combines some advantages of both homogeneous and heterogeneous immunoassays, and has been applied to determining the HBsAg in human blood serum with satisfactory results.

Key words: Poly-N-iso-propylacrylamide, Thermal phase separating technique, Fluorescence immunoassay, HBsAg

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