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Updated: May 12, 2026
Quantifying the Antifungal Activity of Peptides Against Candida albicans
Published on: January 13, 2023
Nylon-3 polymers with selective antifungal activity
Runhui Liu1, Xinyu Chen, Zvi Hayouka
1Department of Chemistry, University of Wisconsin, Madison, Wisconsin 53706, USA.
Abstract:
Host-defense peptides inhibit bacterial growth but show little toxicity toward mammalian cells. A variety of synthetic polymers have been reported to mimic this antibacterial selectivity; however, achieving comparable selectivity for fungi is more difficult because these pathogens are eukaryotes. Here we report nylon-3 polymers based on a novel subunit that display potent antifungal activity (MIC = 3.1 μg/mL for Candida albicans ) and favorable selectivity (IC10 > 400 μg/mL for 3T3 fibroblast toxicity; HC10 > 400 μg/mL for hemolysis).
Insights
New nylon-3 polymers show potent antifungal activity against Candida albicans while exhibiting low toxicity to mammalian cells and red blood cells. This breakthrough offers a promising avenue for developing selective antifungal agents.
Area of Science:
- Polymer chemistry
- Antimicrobial research
- Mycology
Background:
- Host-defense peptides selectively inhibit bacterial growth with minimal mammalian cell toxicity.
- Synthetic polymers can mimic antibacterial selectivity, but achieving similar fungal selectivity is challenging due to eukaryotic fungal pathogens.
Purpose of the Study:
- To develop novel nylon-3 polymers with potent and selective antifungal activity.
- To evaluate the efficacy and safety profile of these new polymers against fungal pathogens and mammalian cells.
Main Methods:
- Synthesis of novel nylon-3 polymers utilizing a unique subunit.
- Antifungal activity testing using minimum inhibitory concentration (MIC) against Candida albicans.
- Mammalian cell toxicity assays (3T3 fibroblasts) and hemolysis assays to determine selectivity (IC10 and HC10 values).
Main Results:
- The novel nylon-3 polymers demonstrated potent antifungal activity against Candida albicans, with a minimum inhibitory concentration (MIC) of 3.1 μg/mL.
- These polymers exhibited favorable selectivity, showing low toxicity to 3T3 fibroblasts (IC10 > 400 μg/mL) and minimal hemolysis (HC10 > 400 μg/mL).
Conclusions:
- Nylon-3 polymers based on a novel subunit are effective against Candida albicans.
- These polymers present a promising platform for developing selective antifungal therapeutics with a wide safety margin.
