Calcium phosphate transfection

Area of Science:

• Molecular Biology
• Cell Biology
• Biotechnology

Background:

• Eukaryotic cell transfection is crucial for genetic studies and biotechnology.
• Calcium phosphate precipitation is a common method for introducing nucleic acids into cells.
• Optimizing transfection efficiency and stability is essential for various applications.

Purpose of the Study:

• To describe two distinct calcium phosphate-based protocols for eukaryotic cell transfection.
• To provide methods for both transient and stable transfection.
• To detail procedures for preparing high-quality plasmid DNA and enhancing transfection efficiency.

Main Methods:

• Basic Protocol: Direct layering of a HEPES-buffered calcium phosphate precipitate onto monolayer cell cultures.
• Alternate High-Efficiency Method: Gradual formation of a BES-buffered calcium phosphate precipitate in the medium before application to cells.
• Support Protocols: Preparation of high-quality plasmid DNA and glycerol or dimethyl sulfoxide (DMSO) shock for increased efficiency.

Main Results:

• Both methods effectively introduce plasmid DNA into eukaryotic cells via precipitate adherence.
• The alternate BES-buffered method demonstrates high efficiency, particularly for stable transformation with circular plasmid DNA.
• Transfection efficiency can be further improved using glycerol or DMSO cell shocking.

Conclusions:

• Two reliable calcium phosphate-based transfection methods are provided for diverse eukaryotic cell applications.
• The alternate method offers enhanced efficiency for stable transformation, applicable to various DNA types.
• High-quality reagents and optimized conditions are key for successful transfection outcomes.