High-Throughput Platform for Efficient Chemical Transfection, Virus Packaging, and Transduction

Area of Science:

• Biotechnology
• Cell Biology
• Molecular Biology

Background:

• Studying gene function necessitates intracellular gene delivery.
• Existing methods for gene modification often lack versatility and efficiency across diverse cell types.
• A need exists for a platform supporting both chemical transfection and viral transduction.

Purpose of the Study:

• To demonstrate the efficacy of a superhydrophobic microwell array chip (SMAR-chip) for high throughput gene delivery.
• To evaluate the SMAR-chip's capability for both chemical transfection and viral transduction.
• To optimize gene delivery methods using the SMAR-chip.

Main Methods:

• High throughput chemical transfection and virus packaging were performed on the SMAR-chip.
• Physically separated microwells facilitated DNA delivery and media changes.
• Two methods, dry and wet, were developed for chemical transfection.
• Virus packaging integrated with target cell transduction was conducted.

Main Results:

• 169 chemical transfections were successfully performed with reduced manual operations.
• Transfection efficiencies comparable to traditional multi-well plates (~65%) were achieved.
• High throughput virus packaging yielded >70% transgene expression efficiency in NIH 3T3 cells.
• Multiple transfections were performed to enhance efficiency or deliver multiple genes.

Conclusions:

• The SMAR-chip offers an efficient and versatile platform for high throughput gene delivery.
• This technology simplifies genetic modification processes for various cell types.
• The SMAR-chip is suitable for large-scale genetic modifications.