The Effect of Tuning Cold Plasma Composition on Glioblastoma Cell Viability

Overview

Journal PLoS One

Specialties General Medicine
Science

Date 2014 Jun 1

PMID 24878760

Citations 58

Authors

Xiaoqian Cheng

Jonathan Sherman

William Murphy

Edward Ratovitski

Jerome Canady

Michael Keidar

Affiliations

Soon will be listed here.

Abstract

Previous research in cold atmospheric plasma (CAP) and cancer cell interaction has repeatedly proven that the cold plasma induced cell death. It is postulated that the reactive oxygen species (ROS) and reactive nitrogen species (RNS) play a major role in the CAP cancer therapy. In this paper, we seek to determine a mechanism of CAP therapy on glioblastoma cells (U87) through an understanding of the composition of the plasma, including treatment time, voltage, flow-rate and plasma-gas composition. In order to determine the threshold of plasma treatment on U87, normal human astrocytes (E6/E7) were used as the comparison cell line. Our data showed that the 30 sec plasma treatment caused 3-fold cell death in the U87 cells compared to the E6/E7 cells. All the other compositions of cold plasma were performed based on this result: plasma treatment time was maintained at 30 s per well while other plasma characteristics such as voltage, flow rate of source gas, and composition of source gas were changed one at a time to vary the intensity of the reactive species composition in the plasma jet, which may finally have various effect on cells reflected by cell viability. We defined a term "plasma dosage" to summarize the relationship of all the characteristics and cell viability.

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