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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Unexplored endemic fruit species from Brazil: Antibiofilm properties, insights into mode of action, and systemic toxicity of four Eugenia spp.

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Author(s):
Orlandi Sardi, Janaina de Cassia ; Freires, Irlan Almeida ; Lazarini, Josy Goldoni ; Infante, Juliana ; de Alencar, Severino Matias ; Rosalen, Pedro Luiz
Total Authors: 6
Document type: Journal article
Source: Microbial Pathogenesis; v. 105, p. 280-287, APR 2017.
Web of Science Citations: 11
Abstract

Brazilian endemic fruit species have aroused attention due to their highly valuable, yet unexplored, agroindustrial, food and therapeutic potential. Herein, we describe the antifungal activity of four Eugenia spp. against Candida albicans biofilms, and further demonstrate insights into their potential mode(s) of action and toxicity in vitro and in vivo. Extracts from different parts (seeds, pulps, leaves) of E. leitonii (EL), E. brasiliensis (EB), E. myrcianthes (EM) and E. involucrata (EI) were obtained (S23 degrees 23',W45 degrees 39') and chemically characterized by GC/MS. The active extracts were tested against C albicans biofilm viability and architecture, as well as mode of action, and toxicology using RAW 264.7 macrophages and Galleria mellonella larvae. The MIC values ranged from 15.62 to > 2000 mu g/mL. The most active extracts were EL (seed, 15.62 mu g/mL) and EB (leaf and seeds, 31.25 and 15.62 mu g/mL, respectively). Treatment with these extracts at 10xMIC reduced biofilm viability by 54-55% (P < 0.0001) as compared to 42% by nystatin. At 10xMIC, all extracts caused damages to biofilm architecture and integrity, and fewer hyphae remained attached to treated biofilms. None of them was found to interfere with cell wall biosynthesis or complexation with ergosterol. The extracts had low toxicity against macrophages in vitro (P > 0.05) and G. mellonella larvae, with mean in vivo LD50 of 1500 mg/kg (EL, seeds); 2500 mg/kg (EB, seeds); and 1250 mg/kg (EB, leaf). The phenolic compounds epicatechin and gallic acid were the major constituents in the extracts. Our findings may open avenues for the application of these yet unexplored native fruits in the food and pharmaceutical industry. (C) 2017 Elsevier Ltd. All rights reserved. (AU)

FAPESP's process: 13/26251-0 - Prospection of anti-inflammatory activity in native fruit species from Brazil
Grantee:Josy Goldoni Lazarini
Support type: Scholarships in Brazil - Master
FAPESP's process: 11/15984-0 - Anti-Candida, antiproliferative and cytotoxic activities evaluation of essential oil and fractions from Coriandrum sativum L.
Grantee:Irlan de Almeida Freires
Support type: Scholarships in Brazil - Master