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Updated: Dec 26, 2025
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Detection and Enrichment of Rare Antigen-specific B Cells for Analysis of Phenotype and Function
Published on: February 16, 2017
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Antibody-modified magnetic nanoparticles as specific high-efficient cell-separation agents.
Arezoo Saei1, Shima Asfia1, Hasan Kouchakzadeh1
1Protein Research Center, Shahid Beheshti University, Tehran, Iran.
Summary
This study presents a novel immunomagnetic separation technique using iron oxide nanoparticles (IONPs) for precise tumor cell isolation. This method enhances early cancer detection and aids in preventing drug resistance and mutation.
Area of Science:
- Biomedical Engineering
- Nanotechnology
- Oncology
Background:
- Tumor cell separation is crucial for cancer detection, mutation prevention, and therapy.
- Magnetic iron oxide nanoparticles (IONPs) offer an efficient method for single-cell separation.
Purpose of the Study:
- To develop an IONP-based immunomagnetic separation technique for isolating HER2-positive tumor cells.
- To create a cost-effective device for single-cell detection and cancer management.
Main Methods:
- Synthesized IONPs were conjugated with antibodies (Abs) targeting human epithelial growth factor receptor 2 (HER2).
- Antibody-conjugated IONPs (Ab-IONPs) were linked using carbodiimide/N-hydroxysuccinimide chemistry.
- The Ab-IONP complex was used for immunomagnetic separation of HER2-positive cells from blood samples.
Main Results:
- Successful attachment of IONPs to antibodies was confirmed.
- High targeting efficiency achieved: 94.5% for BT474 cells and 70.6% for a mixture of BT474 and MCF7 cells.
- The method demonstrated economic efficiency with minimal antibody usage.
Conclusions:
- IONP-based immunomagnetic separation is a highly efficient technique for isolating specific tumor cells.
- This approach shows significant potential for early cancer detection and personalized therapeutic strategies.
- The developed method offers a cost-effective solution for single-cell analysis in oncology.
