Naslov
Antimicrobial Activity of Chamomile Essential Oil: Effect of Different Formulations

Autori
Das, Sourav ; Horváth, Barbara ; Šafranko, Silvija ; Jokić, Stela ; Széchenyi, Aleksandar ; Kőszegi, Tamás

Izvornik
Molecules (1420-3049) 24 (2019), 23; 4321, 17

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
pickering emulsion ; antimicrobial activity ; chamomile essential oil ; free radical generation

Sažetak
Essential oils (EOs) are highly lipophilic, which makes the measurement of their biological action difficult in an aqueous environment. We formulated a Pickering nanoemulsion of chamomile EO (CPe). Surface-modified Stöber silica nanoparticles (20 nm) were prepared and used as a stabilizing agent of CPe. The antimicrobial activity of CPe was compared with that of emulsion stabilized with Tween 80 (CT80) and ethanolic solution (CEt). The antimicrobial effects were assessed by their minimum inhibitory concentration (MIC90) and minimum effective (MEC10) concentrations. Besides growth inhibition (CFU/mL), the metabolic activity and viability of Gram- positive and Gram-negative bacteria as well as Candida species, in addition to the generation of oxygen free radical species (ROS), were studied. We followed the killing activity of CPe and analyzed the efficiency of the EO delivery for examined formulations by using unilamellar liposomes as a cellular model. CPe showed significantly higher antibacterial and antifungal activities than CT80 and CEt. Chamomile EOs generated superoxide anion and peroxide related oxidative stress which might be the major mode of action of Ch essential oil. We could also demonstrate that CPe was the most effective in donation of the active EO components when compared with CT80 and CEt. Our data suggest that CPe formulation is useful in the fight against microbial infections.

Izvorni jezik
Engleski

Znanstvena područja
Kemija, Farmacija

Napomena
This work was supported by EFOP 3.6.1-16-2016-
00004 project (Comprehensive Development for
Implementing Smart Specialization Strategies at
the University of Pécs), University of Pécs,
Medical School, KA-2018-17 and NKFI-EPR
K/115394/2015 grants

POVEZANOST RADA