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Bernardo WLDC, Boriollo MFG, Tonon CC, da Silva JJ, Oliveira MC, de Moraes FC, Spolidorio DMP. Biosynthesis of silver nanoparticles from Syzygium cumini leaves and their potential effects on odontogenic pathogens and biofilms. Front Microbiol 2022; 13:995521. [PMID: 36246249 PMCID: PMC9556836 DOI: 10.3389/fmicb.2022.995521] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2022] [Accepted: 09/02/2022] [Indexed: 11/13/2022] Open
Abstract
This study analyzed the antimicrobial and antibiofilm action and cytotoxicity of extract (HEScL) and silver nanoparticles (AgNPs-HEScL) from Syzygium cumini leaves. GC–MS, UV–Vis, EDX, FEG/SEM, DLS and zeta potential assays were used to characterize the extract or nanoparticles. Antimicrobial, antibiofilm and cytotoxicity analyses were carried out by in vitro methods: agar diffusion, microdilution and normal oral keratinocytes spontaneously immortalized (NOK-SI) cell culture. MICs of planktonic cells ranged from 31.2–250 (AgNPs-HEScL) to 1,296.8–10,375 μg/ml (HEScL) for Actinomyces naeslundii, Fusobacterium nucleatum, Staphylococcus aureus, Staphylococcus epidermidis, Streptococcus mutans, Streptococcus oralis, Veillonella dispar, and Candida albicans. AgNPs-HEScL showed antibiofilm effects (125–8,000 μg/ml) toward Candida albicans, Streptococcus mutans and Streptococcus oralis, and Staphylococcus aureus and Staphylococcus epidermidis. The NOK-SI exhibited no cytotoxicity when treated with 32.8 and 680.3 μg/ml of AgNPs-HEScL and HEScL, respectively, for 5 min. The data suggest potential antimicrobial and antibiofilm action of HEScL, and more specifically, AgNPs-HEScL, involving pathogens of medical and dental interest (dose-, time- and species-dependent). The cytotoxicity of HEScL and AgNPs-HEScL detected in NOK-SI was dose- and time-dependent. This study presents toxicological information about the lyophilized ethanolic extract of S. cumini leaves, including their metallic nanoparticles, and adds scientific values to incipient studies found in the literature.
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Affiliation(s)
- Wagner Luis de Carvalho Bernardo
- Department of Physiology and Pathology, School of Dentistry, São Paulo State University, Araraquara, Brazil
- *Correspondence: Wagner Luís de Carvalho Bernardo,
| | - Marcelo Fabiano Gomes Boriollo
- Department of Oral Diagnosis, Dental School of Piracicaba, State University of Campinas, Piracicaba, Brazil
- Marcelo Fabiano Gomes Boriollo,
| | - Caroline Coradi Tonon
- Department of Physiology and Pathology, School of Dentistry, São Paulo State University, Araraquara, Brazil
| | - Jeferson Júnior da Silva
- Department of Oral Diagnosis, Dental School of Piracicaba, State University of Campinas, Piracicaba, Brazil
| | - Mateus Cardoso Oliveira
- Department of Oral Diagnosis, Dental School of Piracicaba, State University of Campinas, Piracicaba, Brazil
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