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Related Concept Videos

Centrifugation01:05

Centrifugation

Centrifugation is a separation technique based on differences in density or size. It is commonly used to separate solids from aqueous interferents. During centrifugation, the sample is placed in centrifugation tubes and spun at high angular velocity, which allows centrifugal force to act differentially on the different densities or masses of the components. After spinning, the supernatant liquid is decanted. Depending on the specific application, either the pellet or the supernatant is retained...

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Improving electrotransfection efficiency by post-pulse centrifugation.

L H Li1, P Ross, S W Hui

  • 1Membrane Biophysics Laboratory, Roswell Park Cancer Institute, Buffalo, NY 14263, USA.

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|August 6, 1999
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Summary
This summary is machine-generated.

Centrifugation pelleting after electropulsing significantly improves cell viability and transfection efficiency in various cell lines. This optimized method enhances cell recovery and growth compared to conventional techniques.

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Area of Science:

  • Cell Biology
  • Biotechnology
  • Molecular Biology

Background:

  • Electroporation is a common method for introducing molecules into cells.
  • Cell viability and transfection efficiency can be compromised by conventional electroporation protocols.
  • Optimizing post-electroporation handling is crucial for improving cellular outcomes.

Purpose of the Study:

  • To investigate the effect of immediate post-electroporation pelleting by centrifugation on cell viability.
  • To determine the optimal centrifugation parameters for different cell types.
  • To compare the transfection efficiency and cell growth rates using the pelleting method versus conventional methods.

Main Methods:

  • Adherent Chinese Hamster Ovary (CHO) cells and suspended Natural Killer-Leukemia (NK-L), K-562, L1210, and MC2 cells were subjected to electroporation.
  • Immediately after electropulsing, cells were pelleted by centrifugation.
  • Cell viability, growth rates, and transfection efficiency (using FITC-dextran) were assessed under varying centrifugation conditions and cell densities.

Main Results:

  • Pelleting by centrifugation immediately after electropulsing significantly improved cell viability for all tested cell lines.
  • The protective effect was dependent on cell line and pellet thickness, with 5-10 cell layers being optimal for CHO cells.
  • For suspended cells, centrifugation at 13,000 g was optimal.
  • Transfection success rate for FITC-dextran loading in CHO cells approached 100% with maintained growth rates.
  • Transfection efficiency was significantly higher in pelleted cells compared to suspended cells across all five cell lines.

Conclusions:

  • Immediate post-electroporation pelleting is an effective strategy to enhance cell viability and transfection efficiency.
  • This method offers a superior alternative to conventional electroporation, particularly for sensitive cell lines.
  • The optimized pelleting technique supports high transfection success rates and robust cell growth, making it valuable for various cell-based applications.