# Vancomycin Sensitization in is Contingent on Limited Metabolic Flux

## TL;DR

This study shows that changing the metabolism of a harmful bacteria can make it more sensitive to antibiotics like vancomycin.

## Contribution

The study reveals that vancomycin sensitization in bacteria is linked to metabolic flux and can extend to other antibiotics.

## Key findings

- Vancomycin sensitization is contingent on limited metabolic flux and can be partially reversed by carbon supplementation.
- Multidrug-resistant clinical isolates also show vancomycin sensitization, suggesting compensatory mutations influence antibiotic susceptibility.
- Sensitization extends to other gram-positive antibiotics like erythromycin and amoxicillin, unrelated to antibiotic size or mechanism.

## Abstract

The global antibiotic resistance crisis causes nearly
5 million
deaths annually. , a virulent Gram-negative bacterium, is a major cause of hospital-acquired
infections, often coexisting with. Previous studies showed can be sensitized to vancomycin through altered nutrient availability.
This study explores the scope and mechanisms of this phenomenon using
a dual-pronged approach focused on primary metabolism. Through the
application of a tool compound that targets succinate dehydrogenase,
we sought to correlate this sensitization to effects seen in minimal
media growth. Carbon supplementation can partially restore tolerance
with sources that aid in detecting environmental changes, low iron
levels, and altered metabolism. Vancomycin sensitization was also
observed in multidrug-resistant clinical isolates, indicating that
compensatory mutations may influence antibiotic susceptibility and
metabolic flux. Our findings show that can also be sensitized to other gram-positive-specific antibiotics,
such as erythromycin, chloramphenicol, and amoxicillin, with no apparent
correlation to the antibiotic’s size or mechanism. These findings
highlight how different growth conditions affect the susceptibility
of to clinically relevant
antibiotics.