Efeitos antioxidante e gastroprotetor do extrato acetato de etila de Stemodia maritima L em modelo de úlcera gástrica induzida por etanol

Autores

DOI:

https://doi.org/10.33448/rsd-v10i15.22548

Palavras-chave:

Antiúlcera; Compostos fenólicos; Citotoxicidade; Estresse oxidativo.

Resumo

Stemodia maritima L., é um arbusto da família Plantaginaceae, com algumas atividades biológicas já descritas, como: larvicida, antimicrobiana e anti-inflamatória. Portanto, o objetivo deste trabalho foi avaliar as atividades antioxidante e gastroprotetora do extrato acetato de etila de S. maritima. O perfil fitoquímico foi investigado através da dosagem de compostos fenólicos totais, flavonoides e análise por CCD. A toxicidade do extrato foi feita por meio da análise de viabilidade celular com linhagem L929 e a toxicidade aguda pelo Guia OECD 423. A atividade antioxidante foi analisada pelos métodos de redução do íon férrico (FRAP) e atividade antioxidante total (AAT), e a atividade gastroprotetora pelo modelo de úlcera gástrica induzida por etanol absoluto, com avaliação dos níveis de NO, MDA, GSH e MPO nos tecidos dos estômagos. No perfil fitoquímico foi possível identificar a presença de flavonoides, triterpenos, esteroides, mono e sesquiterpenos. O extrato não foi citotóxico frente à linhagem L929, mantendo a viabilidade celular acima de 70% nas doses testadas, e na toxicidade aguda não apresentou alterações fisiológicas indicativas de toxicidade em comparação com o grupo controle. O extrato apresentou atividade antioxidante de 157,3 ± 9,7 mg equivalente de Trolox/g de extrato no método de FRAP, e de 50,0 ± 1,1 % pelo AAT. O extrato acetato de etila de S. maritima, nas doses testadas, reduziu o índice de lesão ulcerativa em relação ao grupo controle lesionado, aumentou os níveis de NO e GSH e foi capaz de diminuir as concentrações de MDA e MPO, acentuando sua atividade gastroprotetora.

Biografia do Autor

Rayane Siqueira de Sousa, Federal University of Pernambuco

Aluna de doutorado

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24/11/2021

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SOUSA, R. S. de .; SILVA, J. de A. G. .; BORBA, E. F. de O. .; RAMOS, K. R. de L. P. .; SILVA, C. J. A. da .; SILVA, P. A. da .; SILVA, M. G. de F. .; RAMOS, B. A. .; MENDES, R. F. V. .; SILVA, T. G. . Efeitos antioxidante e gastroprotetor do extrato acetato de etila de Stemodia maritima L em modelo de úlcera gástrica induzida por etanol. Research, Society and Development, [S. l.], v. 10, n. 15, p. e195101522548, 2021. DOI: 10.33448/rsd-v10i15.22548. Disponível em: https://rsdjournal.org/index.php/rsd/article/view/22548. Acesso em: 21 nov. 2024.

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