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Updated: Feb 17, 2026

Implementation of In Vitro Drug Resistance Assays: Maximizing the Potential for Uncovering Clinically Relevant Resistance Mechanisms
08:46

Implementation of In Vitro Drug Resistance Assays: Maximizing the Potential for Uncovering Clinically Relevant Resistance Mechanisms

Published on: December 9, 2015

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Resource limitation prevents the emergence of drug resistance by intensifying within-host competition

Nina Wale1, Derek G Sim2, Matthew J Jones2

  • 1Center for Infectious Disease Dynamics, Department of Biology, The Pennsylvania State University, University Park, PA 16802; nwale@umich.edu.

Proceedings of the National Academy of Sciences of the United States of America
|December 14, 2017
PubMed

Insights

Limiting resources vital for resistant pathogens can slow antimicrobial resistance evolution. This ecological approach, combined with chemotherapy, prevents resistance emergence even at high frequencies.

Area of Science:

  • Microbiology
  • Evolutionary Biology
  • Infectious Diseases

Background:

  • Antimicrobial resistance (AMR) poses a significant threat to global health, necessitating strategies to slow its evolution.
  • Competitive interactions between drug-susceptible and drug-resistant pathogens within a host influence resistance dynamics.
  • Understanding these interactions is crucial for developing effective resistance management strategies.

Purpose of the Study:

  • To investigate whether limiting a key resource can impede the evolution of antimicrobial resistance.
  • To evaluate the impact of resource limitation on competitive interactions between susceptible and resistant parasites.
  • To demonstrate the potential of combining chemotherapy with ecological interventions for AMR control.

Main Methods:

  • Utilized an in vivo model of malaria infection.
  • Manipulated resource availability to create competitive pressure.
  • Assessed the emergence and proliferation of drug-resistant parasites under different conditions.
  • Introduced resistant mutants de novo or experimentally to test intervention efficacy.

Main Results:

  • Resource limitation significantly retarded the evolution of drug resistance.
  • Intensified competition between susceptible and resistant parasites was observed under resource-limited conditions.
  • Resistance emergence was prevented irrespective of whether resistant mutants arose spontaneously or were pre-introduced.
  • The findings were consistent even when resistant pathogens were present at high initial frequencies.

Conclusions:

  • Combining chemotherapy with ecological interventions, such as resource limitation, is a viable strategy to slow antimicrobial resistance evolution.
  • Targeting competitive interactions within the host can effectively manage resistance, even in the presence of pre-existing resistant strains.
  • This approach broadens the scope of potential treatments for infectious diseases by including previously overlooked compounds and ecological factors.
Keywords:
Plasmodium chabaudicombination therapycompetitiondrug resistanceevolutionary management

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