BacMam-mediated gene delivery into multipotent mesenchymal stromal cells

Area of Science:

• Biotechnology
• Molecular Biology
• Virology

Background:

• Baculoviruses are established tools for high-level protein production in insect cells.
• Modified baculoviruses (BacMam) utilize mammalian promoters for efficient gene delivery into mammalian cells.
• BacMam transduction demonstrates high efficiency with minimal cellular damage across various cell types, including stem cells.

Purpose of the Study:

• To describe methods for generating high-titer BacMam stocks.
• To highlight BacMam's utility for transducing mesenchymal stem cells (MSCs) and their derivatives.
• To showcase BacMam as an effective gene delivery system for challenging cell types.

Main Methods:

• Construction of BacMam viruses using shuttle vectors capable of carrying large gene fragments (up to 38 kb).
• Generation of high-titer BacMam stocks for efficient transduction.
• Application of BacMam for delivering fluorescent protein markers, small interfering RNA (siRNA), and in cell-based assays.

Main Results:

• BacMam viruses achieve high transduction efficiencies in various cell types, including primary and adult stem cells.
• The system supports the delivery and expression of large genes and multiple genes simultaneously.
• Minimal cytopathic effects are observed, preserving cell viability and function.

Conclusions:

• BacMam technology provides an efficient and versatile method for gene delivery and expression in difficult-to-transfect cells.
• This approach is particularly valuable for stem cell research and the development of cell-based therapeutics.
• High-titer BacMam stock generation is crucial for successful transduction of MSCs and their derivatives.