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Related Experiment Videos

Cell reactions to dielectrophoretic manipulation.

S Archer1, T T Li, A T Evans

  • 1Department of Electronics and Electrical Engineering, University of Glasgow, Glasgow, G12 8QQ, United Kingdom.

Biochemical and Biophysical Research Communications
|April 20, 1999
PubMed
Summary

Dielectrophoretic cell manipulation using AC electric fields upregulates gene expression, including the cfos gene, without altering cell morphology or division rates. These molecular changes persist after field removal.

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Area of Science:

  • Biotechnology
  • Cellular Biology
  • Bioengineering

Background:

  • Dielectrophoretic particle manipulation is a promising technique for biotechnology applications like cell sorting.
  • Cell manipulation typically involves brief exposure to radio-frequency AC electric fields.

Purpose of the Study:

  • Investigate acute effects of dielectrophoretic manipulation on isolated cell physiology.
  • Determine if AC electric field exposure impacts cell morphology, proliferation, or gene expression.

Main Methods:

  • Cells were exposed to a 5 MHz, 21 V (peak to peak) electric field using microelectrodes.
  • Assessed cell morphology via SEM, cell-doubling rates, mitochondrial stress (MTT assay), protein expression (Western blot), and gene expression (RT-PCR).

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Main Results:

  • No significant changes in cell morphology, cell-doubling rates, or mitochondrial respiration were observed.
  • Upregulation of fos protein and differential gene expression were detected post-exposure, persisting for at least 0.5 hours.
  • Minimal temperature fluctuations suggest observed effects are not due to heat shock.

Conclusions:

  • AC electric field exposure during dielectrophoretic manipulation induces specific gene expression changes, including cfos upregulation.
  • These transcriptional events occur without gross alterations in cell morphology or cell-cycle dynamics.
  • Further research is needed to identify the specific genes affected and their functional implications.