In vitro and in vivo transfection of primary phagocytes via microbubble-mediated intraphagosomal sonoporation
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Published on: September 2, 2014
Jason C M Lemmon1, Ryan J McFarland, Joanna M Rybicka
1Department of Comparative Biology and Experimental Medicine, Faculty of Veterinary Medicine, University of Calgary, AB, Canada.
Abstract:
The professional phagocytes, such as macrophages and dendritic cells, are the subject of numerous research efforts in immunology and cell biology. The use of primary phagocytes in these investigations however, are limited by their inherent resistance to transfection with DNA constructs. As a result, the use of phagocyte-like immortalized cell lines is widespread. While these cell lines are transfection permissive, they are generally regarded as poor biological substitutes for primary phagocytes. By exploiting the phagocytic machinery of primary phagocytes, we developed a non-viral method of DNA transfection of macrophages that employs intraphagosomal sonoporation mediated by internalized lipid-based microbubbles. This approach enables the transfection of primary phagocytes in vitro, with a modest, but reliable efficiency. Furthermore, this methodology was readily adapted to transfect murine peritoneal macrophages in vivo. This technology has immediate application to current research efforts and has potential for use in gene therapy and vaccination strategies.
Insights
Researchers developed a novel non-viral DNA transfection method for primary phagocytes, overcoming limitations of cell lines. This intraphagosomal sonoporation technique offers a reliable way to modify macrophages for research and potential gene therapy applications.
Area of Science:
- Immunology
- Cell Biology
- Biotechnology
Background:
- Primary phagocytes like macrophages and dendritic cells are crucial in immunology research.
- Their resistance to DNA transfection limits their use, leading to reliance on less accurate cell lines.
- Existing methods for primary phagocyte modification are often inefficient or invasive.
Purpose of the Study:
- To develop a novel, non-viral DNA transfection method for primary phagocytes.
- To overcome the limitations of current transfection techniques for macrophages.
- To enable efficient genetic modification of primary phagocytes for research and therapeutic applications.
Main Methods:
- Developed a non-viral DNA transfection strategy utilizing intraphagosomal sonoporation.
- Employed internalized lipid-based microbubbles to facilitate DNA delivery into the phagosome.
- Exploited the natural phagocytic machinery of primary macrophages.
Main Results:
- Achieved modest but reliable DNA transfection efficiency in primary macrophages in vitro.
- Successfully adapted the methodology for in vivo transfection of murine peritoneal macrophages.
- Demonstrated a viable alternative to traditional transfection methods for professional phagocytes.
Conclusions:
- The intraphagosomal sonoporation method provides an effective means to transfect primary phagocytes.
- This technology enhances the utility of primary phagocytes in immunological studies.
- Potential applications include gene therapy and the development of novel vaccination strategies.
