Pyruvate Abundance Confounds Aminoglycoside Killing of Multidrug-Resistant Bacteria Via Glutathione Metabolism

Overview

Journal Research (Wash D C)

Specialty Biology

Date 2024 Dec 19

PMID 39697188

Authors

Jiao Xiang

Si-Qi Tian

Shi-Wen Wang

Ying-Li Liu

Hui Li

Bo Peng

Affiliations

Soon will be listed here.

Abstract

To explore whether the metabolic state reprogramming approach may be used to explore previously unknown metabolic pathways that contribute to antibiotic resistance, especially those that have been neglected in previous studies, pyruvate reprogramming was performed to reverse the resistance of multidrug-resistant . Surprisingly, we identified a pyruvate-regulated glutathione system that occurs by boosting glycine, serine, and threonine metabolism. Moreover, cysteine and methionine metabolism played a key role in this reversal. This process involved pyruvate-depressed glutathione and pyruvate-promoted glutathione oxidation, which was attributed to the elevated glutathione peroxidase and depressed glutathione reductase that was inhibited by glycine. This regulation inhibited reactive oxygen species (ROS) degradation and thereby elevated ROS to eliminate . Loss of , , and of the metabolic pathways increased and decreased resistance, respectively, both in vitro and in vivo, thereby supporting the hypothesis of a pyruvate-cysteine-glutathione system/glycine-ROS metabolic pathway. The role of this metabolic pathway in drug resistance and reprogramming reversal was demonstrated in laboratory-evolved gentamicin-resistant and other clinically isolated multidrug- and carbapenem-resistant pathogens. Thus, we reveal a less studied antibiotic resistance metabolic pathway along with the mechanisms involved in its reversal.

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