Improved in Vitro and in Vivo Anti- Activity of Essential Oil by Its Incorporation into a Microemulsion System

Overview

Journal Int J Nanomedicine

Publisher Dove Medical Press

Specialty Biotechnology

Date 2021 Jan 6

PMID 33402821

Citations 7

Authors

Luciani Gaspar de Toledo

Matheus Aparecido Dos Santos Ramos

Patricia Bento da Silva

Camila Fernanda Rodero

Veridiana de Sa Gomes

Anderson Noronha da Silva

Fernando Rogerio Pavan

Isabel Cristiane da Silva

Fernando Bombarda Oda

Danilo Luis Flumignan

Andre Gonzaga Dos Santos

Marlus Chorilli

Margarete Teresa Gottardo de Almeida

Tais Maria Bauab

Affiliations

Soon will be listed here.

Abstract

Purpose: Vulvovaginal candidiasis (VVC) is an opportunistic fungal infection that adversely affects a woman's health, due to unpleasant symptoms, therapeutic challenges, and the emergence of resistant strains. The association of natural products and nanotechnology is important to improve the antifungal potential of medicinal plants. We aimed to evaluate the in vitro and in vivo anti- activity of unloaded (EO) and loaded (ME+EO) essential oil of in the microemulsion (ME).

Methods: The chemical analysis of the EO was performed by gas chromatography-mass spectrometry. The ME and ME+EO were characterized by scattering, zeta potential, polarized light microscopy, rheological assays, mucoadhesiveness and transmission electronic microscopy. The in vitro antifungal activity of the EO and ME+EO were evaluated by microdilution technique. The toxicity of EO and ME+EO was analyzed on human cell line HaCat and using alternative model assay with . The experimental in vivo VVC was performed in female mice (C57BL/6).

Results: The main compounds of the EO were found to be citronellal, geranial, geraniol, citronellol, and neral. The formulations exhibited suitable size, homogeneity, negative charge, isotropic behavior, highly organized structure, and pseudoplastic behavior, for vaginal application. TEM photomicrographs showed possible EO droplets inside the spherical structures. The EO, when loaded into the ME, exhibited an improvement in its antifungal action against . The EO was not toxic against brine shrimp nauplii. An in vivo VVC assay showed that the use of the ME significantly improved the action of the EO, since only the ME+EO promoted the eradication of the fungal vaginal infection on the third day of treatment.

Conclusion: The EO and ME+EO are promising alternatives for the control of fungal infections caused by , once the use of nanotechnology significantly improved the antifungal action of the EO, especially in an in vivo model of VVC.

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