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Updated: Jul 22, 2026
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Separating Beads and Cells in Multi-channel Microfluidic Devices Using Dielectrophoresis and Laminar Flow
Published on: February 4, 2011
Dielectrophoretic cell separation and gene expression profiling on microelectronic chip arrays.
Ying Huang1, Sunghae Joo, Melanie Duhon
1Department of Advanced Technology, Nanogen Inc, San Diego, California 92121, USA. yhuang@nanogen.com
Analytical Chemistry
|July 26, 2002
Summary
Dielectrophoresis on microelectronic chip arrays effectively separates diverse cell types with over 95% purity. This method enables accurate gene expression analysis of specific cell subpopulations, crucial for understanding cellular responses and disease mechanisms.
Area of Science:
- Biophysics
- Cell Biology
- Microfluidics
Background:
- Cell membrane dielectric properties vary significantly between cell types.
- Accurate analysis of specific cell subpopulations in heterogeneous samples is challenging.
- Microelectronic chip arrays offer a platform for precise cell manipulation and analysis.
Purpose of the Study:
- To determine cell membrane dielectric properties using dielectrophoresis.
- To achieve efficient separation of distinct cell types using microelectronic chip arrays.
- To enable accurate gene expression profiling of separated cell subpopulations.
Main Methods:
- Dielectrophoretic crossover frequency measurements on a 5x5 microelectronic chip array.
- Cell separation using dielectrophoresis on the chip array.
- Gene expression profiling via electric field-facilitated hybridization on a 10x10 microelectronic chip array.
Main Results:
- Dielectrophoresis achieved high-purity separation (>95%) of various cell types, including U937, Ind-2, SH-SY5Y, and HTB cells from PBMC.
- Gene expression profiles of separated U937 cells showed significant differences compared to pre-separation mixtures.
- Lipopolysaccharide-induced gene expression changes in U937 cells were accurately quantified only after separation.
- Dielectrophoretic forces had minimal impact on the survival and stress of separated HTB and SH-SY5Y cells.
Conclusions:
- Microelectronic chip arrays facilitate high-purity cell separation and gene expression profiling.
- This integrated approach enables precise genetic analysis of specific cell subpopulations in complex biological samples.
- The method holds significant potential for advancing diagnostic and research applications in cell biology and medicine.
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