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Electrically excitable normal rat kidney fibroblasts: A new model system for cell-semiconductor hybrids
1Institut für Angewandte Physik, Ludwig-Maximilians Universität, Munich, Germany.
Biophysical Journal
|February 27, 1999
Summary
Normal rat kidney fibroblasts offer a cost-effective alternative to heart or nerve cells for studying electrical signal transfer in cell-semiconductor hybrids. These cells form coupled layers that generate action potentials without mechanical disturbances.
Area of Science:
- Biotechnology
- Cell Biology
- Bioelectronics
Background:
- Selecting appropriate electrically excitable cells is vital for cell-semiconductor hybrid designs.
- Normal rat kidney (NRK) fibroblasts are a readily culturable cell line with potential applications in bioelectronic experiments.
Purpose of the Study:
- To evaluate NRK fibroblasts as a substitute for traditional electrically excitable cells (heart or nerve cells) in bioelectronic research.
- To compare the electrophysiological and morphological properties of NRK fibroblasts with heart muscle cells.
Main Methods:
- Whole-cell patch-clamp technique for action potential waveform analysis.
- Atomic Force Microscopy (AFM) for cell morphology assessment.
- Reflection Interference Contrast Microscopy (RICM) for substrate adhesion profiling.
Main Results:
- NRK fibroblasts form electrically coupled confluent layers exhibiting spontaneous action potential generation.
- Action potentials in NRK fibroblasts lack associated mechanical disturbances.
- Comparison reveals similarities and differences in action potential waveform, morphology, and adhesion compared to heart muscle cells.
Conclusions:
- NRK fibroblasts present a practical and economical model system for studying signal transfer between electrically excitable cells and extracellular detectors.
- Their ease of maintenance and suitable electrophysiological properties make them a valuable tool in bioelectronic research.