Virucidal antiviral activity of Maytenus quadrangulata extract against Mayaro virus : evidence for the presence of catechins.

dc.contributor.authorNunes, Damiana Antônia de Fátima
dc.contributor.authorLopes, Gabriela Francine Martins
dc.contributor.authorNizer, Waleska Stephanie da Cruz
dc.contributor.authorAguilar, Mariana Guerra de
dc.contributor.authorSantos, Felipe Rocha da Silva
dc.contributor.authorSousa, Grasiely Faria de
dc.contributor.authorFerraz, Ariane Coelho
dc.contributor.authorDuarte, Lucienir Pains
dc.contributor.authorBrandão, Geraldo Célio
dc.contributor.authorVieira Filho, Sidney Augusto
dc.contributor.authorMagalhães, Cíntia Lopes de Brito
dc.contributor.authorFerreira, Jaqueline Maria Siqueira
dc.contributor.authorMagalhães, José Carlos de
dc.date.accessioned2023-10-18T17:06:17Z
dc.date.available2023-10-18T17:06:17Z
dc.date.issued2023pt_BR
dc.description.abstractEthnopharmacological relevance: Mayaro virus (MAYV) is an arbovirus endemic to the Amazon region, which comprises the states of the North and Midwest region of Brazil and encompasses the largest tropical forest in the world, the Amazon Forest. The confirmation of its potential transmission by Aedes aegypti and recent cases in Brazil, mainly in large centers in the northern region, led to the classification of Mayaro fever as an emerging disease. Traditional medicine is commonly used to treat various diseases, mainly by local riverside populations. Some species of the genus Maytenus, which have similar morphologies, are popularly used to treat infections and inflammations. In this context, our research group has studied and confirmed the antiviral activity of several plant-derived compounds. However, several species of this same genus have not been studied and therefore deserve attention. Aim of the study: This study aimed to demonstrate the effects of ethyl acetate extracts of leaves (LAE) and branches (TAE) of Maytenus quadrangulata against MAYV. Materials and methods: Mammalian cells (Vero cells) were used to evaluate the cytotoxicity of the extracts. After cell infection by MAYV and the treatment with the extracts, we evaluated the selectivity index (SI), the virucidal effect, viral adsorption and internalization, and the effect on viral gene expression. The antiviral action was confirmed by quantifying the viral genome using RT-qPCR and by analyzing the effect on virus yield in infected cells. The treatment was performed based on the effective concentration protective for 50% of the infected cells (EC50). Results: The leaves (LAE; EC50 12.0 μg/mL) and branches (TAE; EC50 101.0 μg/mL) extracts showed significative selectivity against the virus, with SI values of 79.21 and 9.91, respectively, which were considered safe. Phytochemical analysis revealed that the antiviral action was associated with the presence of catechins, mainly in LAE. This extract was chosen for the subsequent studies since it reduced the viral cytopathic effect and virus production, even at high viral loads [MOI (multiplicity of infection) 1 and 5]. The effects of LAE resulted in a marked reduction in viral gene expression. The viral title was drastically reduced when LAE was added to the virus before infection or during replication stages, reducing virus production up to 5-log units compared to infected and untreated cells.pt_BR
dc.identifier.citationNUNES, D. A. de F. et al. Virucidal antiviral activity of Maytenus quadrangulata extract against Mayaro virus: evidence for the presence of catechins. Journal of Ethnopharmacology, v. 311, artigo 116436, jul. 2023. Disponível em: <https://www.sciencedirect.com/science/article/pii/S0378874123003045?via%3Dihub>. Acesso em: 01 ago. 2023.pt_BR
dc.identifier.doihttps://doi.org/10.1016/j.jep.2023.116436pt_BR
dc.identifier.issn0378-8741
dc.identifier.urihttp://www.repositorio.ufop.br/jspui/handle/123456789/17594
dc.identifier.uri2https://www.sciencedirect.com/science/article/pii/S0378874123003045?via%3Dihubpt_BR
dc.language.isoen_USpt_BR
dc.rightsrestritopt_BR
dc.subjectArboviruspt_BR
dc.subjectAlphaviruspt_BR
dc.subjectMedicinal plantspt_BR
dc.subjectFolk medicinept_BR
dc.subjectPlant extractspt_BR
dc.titleVirucidal antiviral activity of Maytenus quadrangulata extract against Mayaro virus : evidence for the presence of catechins.pt_BR
dc.typeArtigo publicado em periodicopt_BR

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