Desenvolvimento de antisséptico nanoestruturado para controle de SARS-CoV-2
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Título principal
Desenvolvimento de antisséptico nanoestruturado para controle de SARS-CoV-2 [recurso eletrônico] / Milena Conci de Araujo ; orientador, Marcelo Maraschin ; coorientadora, Milene Dias Miranda
Data de publicação
2022
Descrição física
124 p. : il.
Nota
Disponível somente em versão on-line.
Dissertação (mestrado) – Universidade Federal de Santa Catarina, Centro de Ciências Biológicas, Programa de Pós-Graduação em Biotecnologia e Biociência, Florianópolis, 2022.
Inclui referências.
Desenvolvimento de antisséptico nanoestruturado para controle de SARS-CoV-2 [recurso eletrônico] / Milena Conci de Araujo ; orientador, Marcelo Maraschin ; coorientadora, Milene Dias Miranda
Data de publicação
2022
Descrição física
124 p. : il.
Nota
Disponível somente em versão on-line.
Dissertação (mestrado) – Universidade Federal de Santa Catarina, Centro de Ciências Biológicas, Programa de Pós-Graduação em Biotecnologia e Biociência, Florianópolis, 2022.
Inclui referências.
Abstract: The World Health Organization (WHO) has determined a series of recommendations to contain the advance and spread of COVID-19. Among them, frequent hand hygiene was widely recommended, resulting in an increased consumption of alcohol-based antiseptic products or synthetic molecules. However, when used in excess, these products can cause adverse consequences for human health, such as the development of dermatitis, as for the environment the selection of resistant bacterial genotypes. One of the alternatives to overcome this problem is the replacement of common antiseptics by formulations based on natural bioactive compounds with antimicrobial/antiviral activity. In addition, by nanostructuring formulations, it is possible to increase the bioavailability, stability, solubility and absorption of bioactives in biological systems. The objective of this study was to develop an antiseptic nanoemulsion based on natural bioactive compounds, aiming at the virucidal activity against SARS-CoV-2. For this, oil-in-water (O/W) nanoemulsions were prepared, being the oil phase composed of essential oil, a phenolic bioactive and its respective solvent, while the aqueous phase presented carrageenan and purified water. Physicochemical characterization and stability studies were developed to evaluate the viability of the formulations over time. In addition, bactericidal activities against Staphylococcus aureus and virucidal activity against SARS-CoV-2 were determined by in vitro assays. As a result, average values of 150 nm nanoparticle size were recorded, PdI of 0.2, and zeta potential around -10.0 mV. The stability of nanoformulations indicated the occurrence of quercetin-dependent creaming and sedimentation. In addition, the products showed a minimum validity of 3 months. Regarding the bactericidal activity, the formulations showed a minimum inhibition concentration of 1.25% for S. aureus. In the cytotoxicity and virucidal assays, the products showed 100% of viral replication inhibition and proved to be safe for topical application. In the end, two antiseptic nanoformulations with high virucidal activity and great industrial potential were developed.