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Clinical Microfluidic Chip Platform for the Isolation of Versatile Circulating Tumor Cells
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Capturing cancer cells using aptamer-immobilized square capillary channels.

Jennifer A Martin1, Joseph A Phillips, Parag Parekh

  • 1Center for Research at Bio/Nano Interface, Department of Chemistry and Shands Cancer Center, University of Florida Genetics Institute, University of Florida, Gainesville, FL 32611-7200, USA.

Molecular Biosystems
|March 23, 2011
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Summary

A new aptamer-coated capillary device efficiently captures cancer cells from blood. This simple, cost-effective method aids in disease prognosis and monitoring therapeutic response.

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Area of Science:

  • Biomedical Engineering
  • Analytical Chemistry
  • Cancer Diagnostics

Background:

  • Accurate cancer cell detection is crucial for prognosis and treatment monitoring.
  • Current microfluidic devices for cell capture can be complex to fabricate and use.
  • A need exists for simpler, more efficient methods for isolating cancer cells from biological samples.

Purpose of the Study:

  • To develop a simple square capillary-based device for selective cancer cell capture using aptamers.
  • To evaluate the capture efficiency and specificity of the aptamer-functionalized capillary.
  • To assess the device's potential for imaging and detecting cancer cells in blood samples.

Main Methods:

  • Fabrication of a square capillary device functionalized with aptamers via biotin-avidin chemistry.
  • Testing the device with mixtures of target cancer cells and non-target cells.
  • Quantification of capture efficiency using flow cytometry or similar methods.
  • Optical imaging of captured cells within the square capillary.

Main Results:

  • High capture efficiency for leukemia cells (91.1 ± 3.5%) and colon cancer cell lines (97.2 ± 2.8%, 83.6 ± 5.8%).
  • Significantly higher capture of aptamer-target cells compared to non-target cells.
  • Superior optical properties of the square capillary for cell imaging compared to cylindrical capillaries.
  • Successful detection of leukemia cells in blood samples.

Conclusions:

  • The aptamer-coated square capillary device offers a simple and effective method for cancer cell isolation.
  • The device demonstrates high specificity and efficiency in capturing various cancer cell types.
  • Its improved optical properties and ease of fabrication suggest significant potential for clinical diagnostics and therapeutic monitoring.