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Updated: Sep 14, 2025

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Complex-mediated evasion: modeling defense against antimicrobial peptides with application to human-pathogenic fungus

Yann Bachelot1,2, Anastasia Solomatina1, Marc Thilo Figge3,4

  • 1Applied Systems Biology, Leibniz Institute for Natural Product Research and Infection Biology, Hans Knöll Institute (HKI), Jena, Germany.

NPJ Systems Biology and Applications
|July 22, 2025
PubMed

Insights

Pathogens can evade antimicrobial peptides (AMP) using "Complex-mediated evasion" (CME). This mechanism involves secreting molecules that bind AMP, forming complexes that protect the pathogen and diffuse away, reducing local AMP concentration.

Area of Science:

  • Microbiology
  • Immunology
  • Computational Biology

Background:

  • Antimicrobial peptides (AMPs) are crucial host defense molecules against pathogens.
  • Pathogen immune evasion strategies are critical for infection survival and therapeutic resistance.
  • Understanding these mechanisms is key to developing novel diagnostics and treatments.

Purpose of the Study:

  • To propose and investigate a novel immune evasion mechanism termed "Complex-mediated evasion" (CME).
  • To elucidate how pathogens can protect themselves against AMP activity.
  • To simulate the immune evasion of *Candida albicans* using CME.

Main Methods:

  • Development of a mathematical model to describe CME.
  • Computer simulations to analyze the mechanism's sensitivity to various parameters.
  • Application of the model to simulate the evasion strategies of *Candida albicans*.

Main Results:

  • The study establishes Complex-mediated evasion as a viable immune evasion strategy.
  • Mathematical modeling revealed the sensitivity of CME to different parameters.
  • Simulations demonstrated the potential for *Candida albicans* to employ CME for AMP resistance.

Conclusions:

  • Complex-mediated evasion offers pathogens a protective shield against antimicrobial peptides.
  • This mechanism may contribute to the persistence and pathogenicity of microbes like *Candida albicans*.
  • Further research into CME could reveal new therapeutic targets for combating fungal infections.

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