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Atmospheric-pressure plasma-jet from micronozzle array and its biological effects on living cells for cancer therapy

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7 Author(s)
Kim, Kangil ; Department of Electrical and Computer Engineering, Ajou University, Suwon 443-749, Republic of Korea ; Choi, Jae Duk ; Hong, Yong Cheol ; Kim, Geunyoung
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We propose a plasma-jet device with a micrometer-sized nozzle array for use in a cancer therapy. Also, we show the biological effects of atmospheric-pressure plasma on living cells. Nitrogen-plasma activated a surrogate DNA damage signal transduction pathway, called the ataxia telangiectasia mutated (ATM)-checkpoint kinase 2 pathway, suggesting that the nitrogen-plasma generates DNA double-strand breaks. Phosphorylation of H2AX and p53 was detected in the plasma-treated cells, leading to apoptotic cell death. Thus, an effect for the nitrogen plasma in the control of apoptotic cell death provides insight into the how biological effects of the nitrogen-plasma can be applied to the control of cell survival, a finding with potential therapeutic implications.

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Applied Physics Letters  (Volume:98 ,  Issue: 7 )