Dielectric spectroscopy (DS) of living biological cells is based on the analysis of cells suspended in a physiological medium. It provides knowledge of the polarization-relaxation response of the cells to external electric field as function of the excitation frequency. This response is strongly affected by both structural and molecular properties of the cells and, therefore, can reveal rare insights into cell physiology and behaviour. This study demonstrates the mapping potential of DS after cytoplasmic and membranal markers for cell-based screening analysis. The effect of membrane permittivity and cytoplasm conductivity was examined using tagged MBA and MDCK cell lines respectively. The comparison of the dielectric spectra of tagged and native cell lines reveals clear differences between the cells. In addition, the differences in the matching dielectric properties of the cells were discovered. Those findings support the high distinction resolution and sensitivity of DS after fine molecular and cellular changes, and hence, highlight the high potential of DS as non invasive screening tool in cell biology research.
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