Abstract:
:A biochemical reaction model clarifies for the first time how cold atmospheric plasmas (CAPs) affect mitochondrial redox homeostasis and energy metabolism. Fundamental mitochondrial functions in pyruvic acid oxidation, the tricarboxylic acid (TCA) cycle and oxidative phosphorylation involving the respiratory chain (RC), adenosine triphosphate/adenosine diphosphate (ATP/ADP) synthesis machinery and reactive oxygen species/reactive nitrogen species (ROS/RNS)-mediated mechanisms are numerically simulated. The effects of CAP irradiation are modelled as 1) the influx of hydrogen peroxide (H[Formula: see text]O[Formula: see text]) to an ROS regulation system and 2) the change in mitochondrial transmembrane potential induced by RNS on membrane permeability. The CAP-induced stress modifies the dynamics of intramitochondrial H[Formula: see text]O[Formula: see text] and superoxide anions, i.e., the rhythm and shape of ROS oscillation are disturbed by H[Formula: see text]O[Formula: see text] infusion. Furthermore, CAPs control the ROS oscillatory behaviour, nicotinamide adenine dinucleotide redox state and ATP/ADP conversion through the reaction mixture over the RC, the TCA cycle and ROS regulation system. CAPs even induce a homeostatic or irreversible state transition in cell metabolism. The present computational model demonstrates that CAPs crucially affect essential mitochondrial functions, which in turn affect redox signalling, metabolic cooporation and cell fate decision of survival or death.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Murakami Tdoi
10.1038/s41598-019-53219-wsubject
Has Abstractpub_date
2019-11-20 00:00:00pages
17138issue
1issn
2045-2322pii
10.1038/s41598-019-53219-wjournal_volume
9pub_type
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