Cited by 34Bacterial biofilms and quorum sensingEssential Oils and Antimicrobial ActivityAntimicrobial agents and applications

Assessment of Antibiofilm Potencies of Nervonic and Oleic Acid against Acinetobacter baumannii Using In Vitro and Computational Approaches

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Khadke, Sagar Kiran, Lee, Jin-Hyung, Kim, Yong-Guy, Raj, Vinit, Lee, Jintae·2021·Biomedicines

Abstract

Acinetobacter baumannii is a nosocomial pathogen, and its biofilms are tolerant to desiccation, nutrient starvation, and antimicrobial treatment on biotic and abiotic surfaces, tissues, and medical devices. Biofilm formation by A. baumannii is triggered by a quorum sensing cascade, and we hypothesized that fatty acids might inhibit its biofilm formation by interfering with quorum sensing. Initially, we investigated the antibiofilm activities of 24 fatty acids against A. baumannii ATCC 17978 and two clinical isolates. Among these fatty acids, two unsaturated fatty acids, nervonic and oleic acid, at 20 μg/mL significantly inhibited A. baumannii biofilm formation without affecting its planktonic cell growth (MICs were >500 μg/mL) and markedly decreased the motility of A. baumannii but had no toxic effect on the nematode Caenorhabditis elegans. Interestingly, molecular dynamic simulations showed that both fatty acids bind to the quorum sensing acyl homoserine lactone synthase (AbaI), and decent conformational stabilities of interactions between the fatty acids and AbaI were exhibited. Our results demonstrate that nervonic and oleic acid inhibit biofilm formation by A. baumannii strains and may be used as lead molecules for the control of persistent A. baumannii infections.

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Authors
Khadke, S. K., Lee, J.-H., Kim, Y.-G., Raj, V., & Lee, J.
Affiliations
Yeungnam University (KR)
Corresponding author
Lee, Jintae
Venue
Biomedicines
Publisher
MDPI AG
Published
2021-09-01
Volume
9
Issue
9
Pages
1133
ISSN
2227-9059 (ISSN-L)
OpenAlex
W3197141106
Cited by
33
References
60
Citations by year
2026: 7 · 2025: 8 · 2024: 5 · 2023: 7 · 2022: 6
FWCI
1.41
Type
journal article
Language
en
Open access
Locations
  • Biomedicines (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, other-oa)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
  • Ministry of Education (2014R1A6A1031189, 2021R1I1A3A04037486)
  • National Research Foundation of Korea (2021R1A2C1008368)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Bacterial biofilms and quorum sensing
  • Life Sciences › Agricultural and Biological Sciences › Food Science › Essential Oils and Antimicrobial Activity
  • Physical Sciences › Chemistry › Organic Chemistry › Antimicrobial agents and applications
Keywords
Acinetobacter baumannii, antibiofilm activity, nervonic acid, oleic acid, fatty acids, biofilm formation, quorum sensing, Abai, molecular dynamics simulation, bacterial motility, Caenorhabditis elegans toxicity, nosocomial infections

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