Intracellular redox potential is correlated with miRNA expression in MCF7 cells under hypoxic conditions

Hannah Johnston, Paul Dickinson, Alasdair Ivens, Amy H. Buck, R. D. Levine, Francoise Remacle, Colin J. Campbell

Research output: Contribution to journalArticlepeer-review

Abstract

Hypoxia is a ubiquitous feature of cancers, encouraging glycolytic metabolism, proliferation, and resistance to therapy. Nonetheless, hypoxia is a poorly defined term with confounding features described in the literature. Redox biology provides an important link between the external cellular microenvironment and the cell’s response to changing oxygen pressures. In this paper, we demonstrate a correlation between intracellular redox potential (measured using optical nanosensors) and the concentrations of microRNAs (miRNAs) involved in the cell’s response to changes in oxygen pressure. The correlations were established using surprisal analysis (an approach derived from thermodynamics and information theory). We found that measured redox potential changes reflect changes in the free energy computed by surprisal analysis of miRNAs. Furthermore, surprisal analysis identified groups of miRNAs, functionally related to changes in proliferation and metastatic potential that played the most significant role in the cell’s response to changing oxygen pressure.
Original languageEnglish
Pages (from-to)19753-19759
Number of pages7
JournalProceedings of the National Academy of Sciences
Volume116
Issue number39
Early online date10 Sep 2019
DOIs
Publication statusPublished - 24 Sep 2019

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