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Dose Effect of the Activity of Skin Cancer Cells Treated by Nanosecond Pulsed Electric Field Combined with Multi-Walled Carbon Nanotubes |
Mi Yan1, Li Pan1, Liu Quan1, Yang Qiyu2, Tang Junying2 |
1. State Key Laboratory of Power Transmission Equipment & System Security and New Technology Chongqing University Chongqing 400030 China; 2. First Affiliated Hospital Chongqing Medical Science University Chongqing 400016 China |
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Abstract To study the dose effect of the activity of in vitro cells treated by nanosecond pulsed electric field (nsPEF) combined with multi-walled carbon nanotubes (MWCNTs), CCK-8 assay was used to compare and analyze the change law of A375 cell activity with field strength E, pulse width τ and number of pulses N. It is found that cell activity has a threshold effect (S-type change) with field strength and pulse width, and there is no obvious threshold effect (exponential change) with the number of pulses. The cell activity exhibits a S-shape decrease as the pulsed injection energy E(τN)0.5 increases. By using the logistic model, which is a one-dimensional nonlinear regression analysis method, the functional relationship between cell viability and three pulse parameters is obtained. Moreover, a scaling relationship between cell activity and multiple factors is established. The results show that the addition of MWCNTs does not affect the law between cell viability and pulse parameters, but significantly reduces the nsPEF amplitude required for killing tumor cells, thereby effectively improving the electrical safety of nsPEF in tumor therapy.
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Received: 24 October 2018
Published: 28 November 2019
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