Antibacterial Activity of Selected Essential Oil Compounds Alone and in Combination with β-Lactam Antibiotics Against MRSA Strains

This study aimed to determine the effect of selected essential oil compounds (EOCs) on the antibacterial activity of β-lactam antibiotics (βLAs) against methicillin-resistant (MRSA) strains. The following parameters were studied: antibiotic susceptibility testing, detection of gene and evaluation of...

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Veröffentlicht in:International journal of molecular sciences 2020-09, Vol.21 (19), p.7106
Hauptverfasser: Kwiatkowski, Paweł, Łopusiewicz, Łukasz, Pruss, Agata, Kostek, Mateusz, Sienkiewicz, Monika, Bonikowski, Radosław, Wojciechowska-Koszko, Iwona, Dołęgowska, Barbara
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container_issue 19
container_start_page 7106
container_title International journal of molecular sciences
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creator Kwiatkowski, Paweł
Łopusiewicz, Łukasz
Pruss, Agata
Kostek, Mateusz
Sienkiewicz, Monika
Bonikowski, Radosław
Wojciechowska-Koszko, Iwona
Dołęgowska, Barbara
description This study aimed to determine the effect of selected essential oil compounds (EOCs) on the antibacterial activity of β-lactam antibiotics (βLAs) against methicillin-resistant (MRSA) strains. The following parameters were studied: antibiotic susceptibility testing, detection of gene and evaluation of genotypic relativity of isolates using molecular techniques, analysis of chemical composition applying Fourier-transform infrared (FTIR) spectroscopy, and determination of antibacterial activity of EOCs alone and in combination with βLAs against MRSA strains using microdilution and checkerboard methods. It was found that all isolates expressed MRSA and resistance phenotypes for macrolides, lincosamides, and streptogramins B. All isolates harbored the gene and belonged to three distinct genotypes. Eight of the 10 EOCs showed efficient antimicrobial activity against the MRSA reference strain. The analysis of interaction between EOCs and βLAs against the MRSA reference strain revealed a synergistic and additive effect of the following combinations: methicillin (Met)-linalyl acetate (LinAc), penicillin G (Pen)-1,8-cineole (Cin), and Pen-LinAc. Analysis of EOC-βLA interactions showed a synergistic and additive effect in the following combinations: Met-LinAc (against low- and high-level βLAs resistance strains), Pen-Cin, and Pen-LinAc (against low-level βLAs resistance strains). It was also confirmed that changes in phosphodiester, -OH, -CH and -CH groups may change the interactions with βLAs. Moreover, the presence of two CH O- moieties in the Met molecule could also play a key role in the synergistic and additive mechanism of LinAc action with Met against MRSA strains. Direct therapy using a Met-LinAc combination may become an alternative treatment method for staphylococcal infections caused by MRSA. However, this unconventional therapy must be preceded by numerous cytotoxicity tests.
doi_str_mv 10.3390/ijms21197106
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Analysis of EOC-βLA interactions showed a synergistic and additive effect in the following combinations: Met-LinAc (against low- and high-level βLAs resistance strains), Pen-Cin, and Pen-LinAc (against low-level βLAs resistance strains). It was also confirmed that changes in phosphodiester, -OH, -CH and -CH groups may change the interactions with βLAs. Moreover, the presence of two CH O- moieties in the Met molecule could also play a key role in the synergistic and additive mechanism of LinAc action with Met against MRSA strains. Direct therapy using a Met-LinAc combination may become an alternative treatment method for staphylococcal infections caused by MRSA. 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source MEDLINE; Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals; MDPI - Multidisciplinary Digital Publishing Institute; PubMed Central
subjects Acetic acid
Amides
Anti-Bacterial Agents - pharmacology
Antibacterial activity
Antibiotics
Antimicrobial activity
Antimicrobial agents
beta-Lactams - pharmacology
Chemical composition
Cineole
Cytotoxicity
Drug resistance
Drug Synergism
Essential oils
Genotypes
Humans
Infrared analysis
Linalyl acetate
Lincosamides
MecA protein
Metabolites
Methicillin
Methicillin-Resistant Staphylococcus aureus - drug effects
Microbial Sensitivity Tests
Oils & fats
Oils, Volatile - pharmacology
Optimization
Penicillin
Phenotypes
Relativity
Spectrum analysis
Staphylococcal Infections - drug therapy
Staphylococcus aureus
Staphylococcus infections
Strains (organisms)
Streptogramins
β-Lactam antibiotics
title Antibacterial Activity of Selected Essential Oil Compounds Alone and in Combination with β-Lactam Antibiotics Against MRSA Strains
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