Studies of Solid Phase Immunoassay Based on Near Infrared Upconversion Nanoprobe

ZHOU Jin; ZHANG Mei-ling; ZHANG Li; LI Cui-xia; ZHAO Hui-ying; ZHANG You-lin; XIA An-dong

doi:10.3788/fgxb20183908.1059

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Studies of Solid Phase Immunoassay Based on Near Infrared Upconversion Nanoprobe

更新时间：2020-08-12

- Studies of Solid Phase Immunoassay Based on Near Infrared Upconversion Nanoprobe
- Chinese Journal of Luminescence Vol. 39, Issue 8, Pages: 1059-1065(2018)
- 作者机构：
  
  1. 中国科学院大学北京,100049
  2. 发光学及应用国家重点实验室中国科学院长春光学精密机械与物理研究所, 吉林长春 130033
  3. 吉林大学长春,130012
  4. 中国科学院化学研究所, 北京 100190
- 作者简介：
- 基金信息：
  
  Supported by National Natural Science Foundation of China(61575194,11474278,11504371
- DOI：10.3788/fgxb20183908.1059
  CLC： O482.31
- Received：13 January 2018，
  
  Revised：24 February 2018，
  
  Published Online：04 December 2017，
  
  Published：05 August 2018
- 稿件说明：
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周进, 张美玲, 张俐等. 基于近红外上转换纳米探针的固相免疫检测研究[J]. 发光学报, 2018,39(8): 1059-1065

ZHOU Jin, ZHANG Mei-ling, ZHANG Li etc. Studies of Solid Phase Immunoassay Based on Near Infrared Upconversion Nanoprobe[J]. Chinese Journal of Luminescence, 2018,39(8): 1059-1065
周进, 张美玲, 张俐等. 基于近红外上转换纳米探针的固相免疫检测研究[J]. 发光学报, 2018,39(8): 1059-1065 DOI： 10.3788/fgxb20183908.1059.

ZHOU Jin, ZHANG Mei-ling, ZHANG Li etc. Studies of Solid Phase Immunoassay Based on Near Infrared Upconversion Nanoprobe[J]. Chinese Journal of Luminescence, 2018,39(8): 1059-1065 DOI： 10.3788/fgxb20183908.1059.

摘要

以氯化物为原料通过溶剂热法合成了尺寸均匀的NaYF

：Yb

，Tm

上转换纳米粒子（UCNPs），利用聚丙烯酸（PAA）取代UCNPs表面的油酸配体，引入羧基和人IgG的氨基共价结合（H端），再用蛋白G（protein G）作"桥"将兔抗羊IgG（r-a-g IgG）修饰在硅片表面（R端），以消除由于硅片"刚性"表面与r-a-g IgG分子直接偶联而导致其结构或构象的变化，从而实现硅片表面与r-a-g IgG的"柔性"生物偶联。利用抗原抗体的特异性免疫反应，将H端和R端通过羊抗人IgG（g-a-h IgG）结合，建立了简单高效和快速灵敏检测溶液中g-a-h IgG的新型免疫分析方法。实验结果表明：g-a-h IgG在5~400 nmol/L浓度范围内与上转换荧光强度具有良好的线性关系，该传感器检测限为1.82 nmol/L，并表现出优秀的检测特异性。本项研究为临床各种重大疾病的免疫分析诊断提供了一种宽线性范围和高特异性的新型免疫方法和平台。

Abstract

Uniformed NaYF

:Yb

nanoparticles were synthesized through solvent thermal method in chloride. PAA-based ligand replace strategies were carried out to introduce free carboxylic acid groups which allowed further conjugation with NH

-containing human IgG. The silicon wafer was modified with rabbit anti-goat IgG by using protein G as "bridge"

which contributed to eliminate structural or conformational changes of IgG. Owing to the specific antibody recognition to the antigenic

a simple

rapid

efficient and sensitive immunoassay method was developed. The experimental results demonstrate that there is a very good linear correlation between the upconversion luminescence intensity and the amount of goat anti-human IgG in the range of 5~400 nmol/L. The detection limit is as low as 1.82 nmol/L. Our developed detection system shows excellent detection specificity and sensitivity

which provides a new detection method and platform with wide linear range and high sensitivity for diagnosis of major clinical diseases in the future.

关键词

Keywords

references

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