Chemiluminescence enzyme immunoassay based on magnetic nanoparticles for detection of hepatoceUular

• 作 者: Qian-Yun Zhang Hui Chen Zhen L
• 机 构: Department of Chemistry, Tsinghua University, Beijing 100084, China／School of Science, Beijing Unive
• 出 处: 药物分析学报：英文版
• 发表日期: 2011年3期
• 关键词: Magnetic nanoparticle Magnetic microparticleChemiluminescenceenzyme immunoassay

Glypican-3 （GPC3） is reported as a great promising tumor marker for hepatocellular carcinoma （HCC） diagnosis. Highly sensitive and accurate analysis of serum GPC3 （sGPC3）, in combination with or instead of traditional HCC marker alpha-fetoprotein （AFP）, is essential for early diagnosis of I-ICC. Biomaterial-functionalized magnetic particles have been utilized as solid supports with good biological compatibility for sensitive immunoassay. Here, the magnetic nanoparticles （MnPs） and magnetic microparticles （MmPs） with carboxyl groups were further modified with streptavidin, and applied for the development of chemiluminescence enzyme immunoassay （CLEIA）. After comparing between MnPs- and MmPs-based CLEIA, MnPs-based CLEIA was proved to be a better method with less assay time, greater sensitivity, better linearity and longer chemiluminescence platform. MnPs-based CLEIA was applied for detection of sGPC3 in normal liver, hepatocirrhosis, secondary liver cancer and HCC serum samples. The results indicated that sGPC3 was effective in diagnosis of HCC with high performance.