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Calcium Phosphate Transfection of Primary Hippocampal Neurons
Published on: November 12, 2013
High Ca2+-phosphate transfection efficiency in low-density neuronal cultures
1Department of Biology, Huck Institutes of Life Sciences, The Pennsylvania State University, University Park, Pennsylvania 16802, USA.
Nature Protocols
|April 5, 2007
Summary
This new calcium phosphate transfection protocol enhances neuronal gene delivery efficiency up to 60% with minimal cell toxicity. This method offers a significant improvement for studying gene function in neurons.
Area of Science:
- Neuroscience
- Molecular Biology
- Biochemistry
Background:
- Calcium phosphate (Ca2+-phosphate) transfection is a common method for introducing genetic material into neurons.
- Traditional Ca2+-phosphate transfection methods suffer from low efficiency (1-5%) and potential cell toxicity.
- Efficient gene delivery is crucial for functional analysis in neuronal research.
Purpose of the Study:
- To develop a high-efficiency, low-toxicity Ca2+-phosphate transfection protocol for neuronal cells.
- To significantly improve transfection efficiency compared to existing methods.
- To enable gene functional analysis in various types of neurons, including mature and autaptic neurons.
Main Methods:
- Gentle mixing of DNA-Ca2+ solution with phosphate buffer to form homogeneous precipitates (1-3 microm).
- Dissolving the precipitate in slightly acidic culture medium to minimize cell toxicity.
- Application of the optimized protocol to transfect neuronal cultures.
Main Results:
- Achieved a 10-fold increase in transfection efficiency, reaching up to 60%.
- Maintained low cell toxicity, preserving neuronal viability.
- Successfully transfected both single autaptic and mature neurons (15-82 days in vitro).
Conclusions:
- The novel Ca2+-phosphate transfection protocol offers a highly efficient and safe method for neuronal gene delivery.
- This improved protocol facilitates gene functional analysis in diverse neuronal models.
- The method is rapid, requiring only 2-4 hours for completion.
