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Highly Efficient Transfection of Human THP-1 Macrophages by Nucleofection
Published on: September 2, 2014
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Microfluidic Transfection System and Temperature Strongly Influence the Efficiency of Transient Transfection.
Michaela Dehne1,2, Simon Valentin Neidinger3, Michael Stark3
1Institute of Technical Chemistry, Leibniz University Hannover, Hannover 30167, Germany.
ACS Omega
|May 20, 2024
Summary
A novel 3D-printed microfluidic system enhances transient transfection (TTF) efficiency in CHO-K1 cells. Optimal results were achieved at 22°C, correlating transfection efficiency with cell membrane phase transitions.
Area of Science:
- Biotechnology
- Cell Biology
- Microfluidics
Background:
- Transient transfection (TTF) is crucial for gene expression studies.
- Efficient polyplex uptake and gene expression depend on optimizing TTF conditions.
- CHO-K1 cells are widely used in biopharmaceutical research.
Purpose of the Study:
- To develop and evaluate a 3D-printed microfluidic system for direct TTF of CHO-K1 cells.
- To investigate the impact of post-transfection incubation time and temperature on transfection efficiency, viability, and viable cell concentration.
- To explore the relationship between cell membrane phase transitions and transfection outcomes.
Main Methods:
- Utilized a 3D-printed microfluidic device for direct TTF of suspension CHO-K1 cells.
- Systematically varied post-transfection incubation time (t) and temperature (T).
- Measured transfection efficiency (TFE), viability (V), and viable cell concentration (VCC).
Main Results:
- The microfluidic system significantly outperformed manual transfection methods.
- Optimal transfection output (VCC × TFE) was observed at t = 1 hour and T = 22°C.
- Transfection efficiency showed a strong increase around 19°C, coinciding with the cell membrane phase transition temperature.
Conclusions:
- The 3D-printed microfluidic system offers a superior approach for TTF in CHO-K1 cells.
- Post-transfection incubation temperature significantly influences transfection efficiency and cell viability.
- Cell membrane order and permeability, linked to phase transitions, play a critical role in determining transfection efficiency.
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