New! Sign up for our free email newsletter.
Science News
from research organizations

A new weapon in the battle against antibiotic resistance: Temperature

Date:
June 14, 2024
Source:
University of Groningen
Summary:
Scientists have shown in laboratory experiments that an increase in temperature from 37 to 40 degrees Celsius increased the resistance rate for two antimicrobials, while for a third antimicrobial, the higher temperature reduced the resistance rate. If these results can be replicated in human patients, fever control could be a new way to mitigate the emergence of antibiotic resistance.
Share:
FULL STORY

Scientists from the University of Groningen (the Netherlands), together with colleagues from the University of Montpellier (France) and the University of Oldenburg (Germany), have tested how a fever could affect the development of antimicrobial resistance. In laboratory experiments, they found that a small increase in temperature from 37 to 40 degrees Celsius drastically changed the mutation frequency in E. coli bacteria, which facilitates the development of resistance. If these results can be replicated in human patients, fever control could be a new way to mitigate the emergence of antibiotic resistance. The results were published in the journal JAC-Antimicrobial Resistance.

Antimicrobial resistance of pathogens is a worldwide problem, and recognized by the WHO as one of the top global public health and development threats. There are two ways to fight this: by developing new drugs, or by preventing the development of resistance. 'We know that temperature affects the mutation rate in bacteria', explains Timo van Eldijk, co-first author of the paper. 'What we wanted to find out was how the increase in temperature associated with fever influences the mutation rate towards antibiotic resistance.'

Three antibiotics

'Most studies on resistance mutations were done by lowering the ambient temperature, and none, as far as we know, used a moderate increase above normal body temperature,' Van Eldijk reports. Together with Master's student Eleanor Sheridan, Van Eldijk cultured E. coli bacteria at 37 or 40 degrees Celsius, and subsequently exposed them to three different antibiotics to assess the effect. 'Again, some previous human trials have looked at temperature and antibiotics, but in these studies the type of drug was not controlled.' In their laboratory study, the team used three different antibiotics with different modes of action: ciprofloxacin, rifampicin, and ampicillin.

The results showed that for two of the drugs, ciprofloxacin and rifampicin, increased temperature led to an increase in the mutation rate towards resistance. However, the third drug, ampicillin, caused a decrease in the mutation rate towards resistance at fever temperatures. 'To be certain of this result, we actually replicated the study with ampicillin in two different labs, at the University of Groningen and the University of Montpellier, and got the same result,' says Van Eldijk.

Fever-suppressing drugs

The researchers hypothesized that a temperature dependence of the efficacy of ampicillin could explain this result, and confirmed this in an experiment. This explains why ampicillin resistance is less likely to arise at 40 degrees Celsius. 'Our study shows that a very mild change in temperature can drastically change the mutation rate towards resistance to antimicrobials,' concludes Van Eldijk. 'This is interesting, as other parameters such as the growth rate do not seem to change.'

If the results are replicated in humans, this could open the way to tackling antimicrobial resistance by lowering the temperature with fever-suppressing drugs, or by giving patients with a fever antimicrobial drugs with higher efficacy at higher temperatures. The team concludes in the paper: 'An optimized combination of antibiotics and fever suppression strategies may be a new weapon in the battle against antibiotic resistance.'


Story Source:

Materials provided by University of Groningen. Original written by René Fransen. Note: Content may be edited for style and length.


Journal Reference:

  1. Timo J B Van Eldijk, Eleanor A Sheridan, Guillaume Martin, Franz J Weissing, Oscar P Kuipers, G Sander Van Doorn. Temperature dependence of the mutation rate towards antibiotic resistance. JAC-Antimicrobial Resistance, 2024; 6 (3) DOI: 10.1093/jacamr/dlae085

Cite This Page:

University of Groningen. "A new weapon in the battle against antibiotic resistance: Temperature." ScienceDaily. ScienceDaily, 14 June 2024. <www.sciencedaily.com/releases/2024/06/240614141913.htm>.
University of Groningen. (2024, June 14). A new weapon in the battle against antibiotic resistance: Temperature. ScienceDaily. Retrieved July 20, 2024 from www.sciencedaily.com/releases/2024/06/240614141913.htm
University of Groningen. "A new weapon in the battle against antibiotic resistance: Temperature." ScienceDaily. www.sciencedaily.com/releases/2024/06/240614141913.htm (accessed July 20, 2024).

Explore More

from ScienceDaily

RELATED STORIES