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Terpinen-4-ol as an Antibacterial and Antibiofilm Agent against Staphylococcus aureus

Laísa Cordeiro1, Pedro Figueiredo1, Helivaldo Souza2

  • 1Department of Pharmaceutical Science, Federal University of Paraíba, João Pessoa 58033-455, Brazil.

International Journal of Molecular Sciences
|July 8, 2020
PubMed

Insights

Terpinen-4-ol, derived from Melaleuca alternifolia oil, shows significant antibacterial and antibiofilm activity against Staphylococcus aureus. This compound demonstrates potential as a new therapeutic agent, with in silico studies suggesting favorable pharmacokinetics and a specific molecular target.

Area of Science:

  • Microbiology
  • Pharmacology
  • Natural Products Chemistry

Background:

  • Staphylococcus aureus exhibits rapid drug resistance and biofilm formation, necessitating novel antibacterial strategies.
  • Melaleuca alternifolia essential oil possesses antibacterial properties, primarily attributed to terpinen-4-ol.
  • The emergence of antibiotic-resistant bacteria underscores the need for alternative therapeutic agents.

Purpose of the Study:

  • To evaluate the antibacterial and antibiofilm efficacy of terpinen-4-ol against Staphylococcus aureus.
  • To investigate the synergistic effects of terpinen-4-ol in combination with existing antibacterial drugs.
  • To assess the pharmacokinetic profile and molecular targets of terpinen-4-ol using in silico methods.

Main Methods:

  • Determination of Minimal Inhibitory Concentration (MIC) and Minimal Bactericidal Concentration (MBC).
  • Evaluation of terpinen-4-ol's activity against Staphylococcus aureus biofilms.
  • In silico pharmacokinetic analysis and molecular docking studies against bacterial targets.

Main Results:

  • Terpinen-4-ol exhibited a MIC of 0.25% (v/v) and MBC of 0.5% (v/v), indicating bactericidal activity.
  • Effective antibiofilm activity and synergistic effects when combined with other antibacterials were observed.
  • In silico analysis predicted adequate in vivo absorption and distribution, with penicillin-binding protein 2a identified as a potential molecular target.

Conclusions:

  • Terpinen-4-ol demonstrates significant potential as a standalone antibacterial and antibiofilm agent against Staphylococcus aureus.
  • The compound's favorable pharmacokinetic profile and identified molecular target support further investigation for therapeutic applications.
  • This study provides a foundation for developing terpinen-4-ol-based pharmacological treatments against resistant bacterial infections.
Keywords:
Staphylococcus aureusantibacterialantibiofilmcheckerboard methodmolecular dockingterpinen-4-ol

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