The effects of electroporation buffer composition on cell viability and electro-transfection efficiency
Open accessAbstract
Electroporation is an electro-physical, non-viral approach to perform DNA, RNA, and protein transfections of cells. Upon application of an electric field, the cell membrane is compromised, allowing the delivery of exogenous materials into cells. Cell viability and electro-transfection efficiency (eTE) are dependent on various experimental factors, including pulse waveform, vector concentration, cell type/density, and electroporation buffer properties. In this work, the effects of buffer composition on cell viability and eTE were systematically explored for plasmid DNA encoding green fluorescent protein following electroporation of 3T3 fibroblasts. A HEPES-based buffer was used in conjunction with various salts and sugars to modulate conductivity and osmolality, respectively. Pulse applications were chosen to maintain constant applied electrical energy (J) or total charge flux (C/m 2 ). The energy of the pulse application primarily dictated cell viability, with Mg 2+ -based buffers expanding the reversible electroporation range. The enhancement of viability with Mg 2+ -based buffers led to the hypothesis that this enhancement is due to ATPase activation via re-establishing ionic homeostasis. We show preliminary evidence for this mechanism by demonstrating that the enhanced viability is eliminated by introducing lidocaine, an ATPase inhibitor. However, Mg 2+ also hinders eTE compared to K + -based buffers. Collectively, the results demonstrate that the rational selection of pulsing conditions and buffer compositions are critical for the design of electroporation protocols to maximize viability and eTE.
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Disadvantages of non-viral vector and DNA transfection systems include process complexity, need for significant method optimization to overcome low efficiency of CAR expression, need for cell sorting post-engineering, and significant cell loss during gene delivery.
“Disadvantage of these systems include process complexity, need for significant method optimization to overcome low efficiency of CAR expression, need for cell sorting post-engineering (Table S1) and significant cell loss during gene delivery (106).”
From Scalable Manufacturing of CAR T Cells for Cancer Immunotherapy (2021) · cites this paper as [106]
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- Authors
- Sherba, J. J., Hogquist, S., Lin, H., Shan, J. W., Shreiber, D. I., & Zahn, J. D.
- Affiliations
- Rutgers, The State University of New Jersey (US)
- Corresponding author
- Zahn, Jeffrey D.
- Venue
- Scientific Reports
- Published
- 2020-02-20
- Volume
- 10
- Issue
- 1
- Pages
- 3053-3053
- ISSN
- 2045-2322 (ISSN-L)
- PMC
- PMC7033148
- OpenAlex
- W3007613875
- Cited by
- 117
- References
- 40
- Citations by year
- 2026: 16 · 2025: 16 · 2024: 15 · 2023: 18 · 2022: 26 · 2021: 19 · 2020: 7
- FWCI
- 9.06
- Type
- journal article
- Language
- en
- Open access
- gold
- doi.org
- Locations
- Scientific Reports (publishedVersion, cc-by)
- PubMed Central (publishedVersion, cc-by)
- PubMed (publishedVersion)
- Rutgers University Community Repository (Rutgers University) (submittedVersion, cc-by)
- Funders
- National Science Foundation (DBI IDBR 135391, CBET 0967598)
- Topics
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Biotechnology › Microbial Inactivation Methods
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › RNA Interference and Gene Delivery
- Health Sciences › Medicine › Radiology, Nuclear Medicine and Imaging › Plasma Applications and Diagnostics
- Keywords
- electroporation, cell viability, plasmid transfection, 3T3 fibroblasts, HEPES buffer, magnesium ions, potassium ions, osmolality, conductivity, pulse energy, ATPase activation, ion homeostasis, lidocaine, ATPase inhibitors, green fluorescent protein
- MeSH terms
- Adenosine Triphosphatases, Animals, Buffers, Cell Survival, Electricity, Magnesium, Transfection, Electroporation, NIH 3T3 Cells, Mice
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