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Related Concept Videos

Flow Cytometry01:23

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The development of flow cytometry techniques began in 1934 with initial attempts by Andrew Moldavan, a bacteriologist who counted the cells in a flowing capillary system. Moldavan pumped cells through a capillary tube focused under a microscope for visualization. The invention of photometry allowed the measurement of differentially-stained cells, and Louis Kamentsky developed the first multiparameter flow cytometer in 1965 to identify and count the cancer cells in cervical tissue specimens.
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Microfluidics-based High-throughput Circulating Tumor Cell Sorting and Single-cell Sequencing Technology
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Profiling Functional and Biochemical Phenotypes of Circulating Tumor Cells Using a Two-Dimensional Sorting Device.

Mahla Poudineh1, Mahmoud Labib2, Sharif Ahmed2

  • 1Department of Electrical and Computer Engineering, University of Toronto, Toronto, ON, Canada.

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Researchers developed a new microfluidic method to analyze circulating tumor cells (CTCs). This technique reveals a link between cell surface markers and their metastatic potential, aiding cancer research.

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Area of Science:

  • Oncology
  • Biotechnology
  • Cell Biology

Background:

  • Tumors release circulating tumor cells (CTCs) into the bloodstream during cancer progression.
  • CTCs exhibit phenotypic heterogeneity, with some possessing benign properties and others high metastatic potential.
  • Characterizing CTC heterogeneity is crucial for understanding cancer metastasis but remains challenging.

Purpose of the Study:

  • To develop and validate a novel microfluidic approach for profiling heterogeneous circulating tumor cell (CTC) subpopulations.
  • To enable sorting of small cancer cell numbers based on independent phenotypic properties.
  • To investigate the relationship between surface marker expression and migratory behavior in CTCs.

Main Methods:

  • A microfluidic system was designed to profile cell behavior along two independent phenotypic axes.
  • Nanoparticle-based methods were used for initial profiling based on surface marker expression.
  • Subsequent separation was based on cell migration profiles in response to a chemotactic agent.
  • The technique was applied to CTCs from mice with xenografted tumors.

Main Results:

  • The new microfluidic approach successfully profiled heterogeneous cell subpopulations.
  • A strong correlation was observed between CTC surface marker expression and their migration potential.
  • The system demonstrated the ability to characterize functional diversity in CTCs.

Conclusions:

  • The developed microfluidic system offers a novel method for deconstructing CTC heterogeneity.
  • This technology facilitates the characterization of functional diversity in circulating tumor cells.
  • Understanding CTC functional diversity is key to advancing cancer metastasis research and therapeutic strategies.