Numerical Modelling of the Effects of Cold Atmospheric Plasma on Mitochondrial Redox Homeostasis and Energy Metabolism

Overview

Journal Sci Rep

Specialty Science

Date 2019 Nov 22

PMID 31748630

Citations 4

Authors

Tomoyuki Murakami

Affiliations

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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.

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