Cold atmospheric plasma jet effects on V79-4 cells.

Area of Science:

• Plasma Physics and Chemistry
• Cell Biology
• Biomedical Engineering

Background:

• Cold atmospheric plasmas generate charged particles, reactive oxygen species (ROS), reactive nitrogen species (RNS), UV photons, and electric fields.
• These plasma components offer potential for various biomedical applications, including cancer therapy.

Purpose of the Study:

• To investigate the effects of chemically activated cold plasma on mammalian cell viability.
• To determine the influence of gas mixture composition and treatment duration on cell death.
• To explore the role of ROS in plasma-induced cell death for potential cancer therapy applications.

Main Methods:

• Exposure of V79-4 mammalian cells to a helium and oxygen gas mixture plasma jet.
• Varying plasma treatment durations (30-150 seconds) and oxygen flow rates.
• Assessment of cell viability using the MTT assay to quantify cytotoxic effects.

Main Results:

• Plasma jet treatment significantly decreased cell viability across all tested conditions.
• The type of cell death (apoptosis or necrosis) was dependent on the specific gas mixture and treatment time.
• Increased oxygen concentration and treatment duration correlated with higher ROS density, suggesting a primary role in cell death.

Conclusions:

• Chemically activated cold plasma exhibits potent cytotoxic effects on mammalian cells.
• Reactive oxygen species (ROS) are strongly implicated as the mediators of plasma-induced cell death.
• This study supports the potential of cold plasma technology as a therapeutic modality, particularly for cancer treatment.