Journal
TALANTA
Volume 81, Issue 4-5, Pages 1162-1169Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.talanta.2010.01.042
Keywords
Fluorescence; Magnetism; Bifunctional nanocomposites; Cancer cells detection; Quantum dots
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Funding
- Shanghai Science and Technology Committee [0752nm028, 08JC140600]
- LADP-SHNU [DZL806]
- National Basic Research Program of China [2008CB617504]
- Shanghai Key Laboratory of Rare-earth Functional Materials [07dz22303]
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We developed a novel strategy to detect lung cancer cells by utilizing magnetic and fluorescent bifunctional nanocomposites (BNPs) in combination with monoclonal anti-carcinoembryonic antigen (CEA) antibodies The BNPs, consisting of silica-coated superparamagnetic nanoparticles and quantum clots (QDs), exhibited high luminescence and were easily separated in an external magnetic field. The binding specificity of the antibody-conjugated BNPs (immunonanoparticles) were confirmed via incubating with human lung adenocarcinoma SPCA-1 cells, human leukemic K562 cells and human embryonic lung fibroblasts MRC-5 cells Further experiments demonstrated that the as-prepared immunonanoparticles can efficiently capture and detect cancer cells in pleural effusion from lung cancer patients. These results suggest that this method, of which the detection procedures are completed within 1 h, could be applied to the rapid and cost-effective monitoring of cancer cells in clinical samples. (C) 2010 Elsevier B V All rights reserved
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