Dr. Denis Zolotukhin Profile

Dr. Denis Zolotukhin

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Proceedings Article | 3 April 2024 Presentation + Paper

Multi-time-frame cell physiology assessment of cold atmospheric plasma emission bioeffects

Alexander Horkowitz, Denis Zolotukhin, Michael Keidar

Proceedings Volume 12826, 1282608 (2024) https://doi.org/10.1117/12.2686925

KEYWORDS: Flow cytometry, Tumors, Cancer, Atmospheric plasma, Cell death, Mitochondria, Calcium

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The physical emissions from cold atmospheric plasma (CAP) devices have been shown to be efficacious in killing U87-MG glioblastoma multiform cells in vitro. While reduction of cell viability has been previously demonstrated, the biological mechanisms involved remain a mystery. To address this, the present study investigates the bioeffects of CAP discharge tube (DT) treatment on U87-MG glioblastoma multiform cells in vitro, considering separation distance, treatment duration, multiple treatments, and incubation time post treatment. Assessment of apoptotic progression, membrane permeability, intracellular reactive oxygen species (ROS) concentration, and mitochondrial membrane potential by flow cytometry demonstrates that DT treatment causes oxidative stress and apoptotic progression in U87-MG cells. Cumulative treatment with multiple short duration treatments is also shown to increase efficacy of DT treatment compared to single long duration treatment. Cell viability and intracellular ROS concentration observed 2, 6, 24, 48, and 72 hours post DT treatment demonstrate pronounced effects of DT treatment lasting multiple days, improving upon our current understanding of this novel treatment modality.

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