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Characterization of Tumor Cells Using a Medical Wire for Capturing Circulating Tumor Cells: A 3D Approach Based on Immunofluorescence and DNA FISH
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Electrical Detection Method for Circulating Tumor Cells Using Graphene Nanoplates.

Song-I Han1, Ki-Ho Han1

  • 1Department of Nano Science and Engineering, Center for Nano Manufacturing, Inje University , 607 Obang-dong, Gimhae, Gyongnam 621-749, Republic of Korea.

Analytical Chemistry
|September 25, 2015
PubMed
Summary
This summary is machine-generated.

This study introduces a microfluidic device for detecting circulating tumor cells (CTCs). Graphene nanoplates enhance electrical detection, achieving 94% accuracy in identifying CTCs in enriched blood samples.

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Area of Science:

  • Biomedical Engineering
  • Nanotechnology
  • Oncology

Background:

  • Circulating tumor cells (CTCs) are crucial biomarkers for cancer detection and monitoring.
  • Enriching rare CTCs from blood is challenging due to their low abundance.
  • Electrical properties of cells can be used for discrimination, but require sensitive methods.

Purpose of the Study:

  • To develop a microfluidic device for sensitive electrical discrimination of CTCs.
  • To utilize graphene nanoplates (GNPs) for enhanced CTC surface conductivity.
  • To improve the accuracy of CTC detection in enriched blood samples.

Main Methods:

  • A two-step cascade microfluidic system combining CTC enrichment and impedance cytometry.
  • Lateral magnetophoresis for enriching CTCs from peripheral blood.
  • Graphene nanoplates (GNPs) functionalization for modifying CTC electrical impedance.

Main Results:

  • The CTC-enrichment device achieved nearly 500-fold enrichment of colorectal cancer cells (DLD-1).
  • GNP-modified CTCs exhibited a significant phase shift (~100°) in electrical signals compared to normal blood cells.
  • Impedance cytometry successfully identified CTCs with 94% accuracy from enriched samples.

Conclusions:

  • The developed microfluidic device with GNPs offers a highly accurate method for electrical discrimination of CTCs.
  • This approach shows promise for non-invasive cancer diagnosis and monitoring.
  • GNP-mediated electrical property modification is an effective strategy for enhancing cell detection.