http://repositorio.unb.br/handle/10482/28826
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ARTIGO_ClusiaxanthoneTocotrienolSeries.pdf | 809,39 kB | Adobe PDF | View/Open |
Title: | Clusiaxanthone and tocotrienol Series from Clusia pernambucensis and their antileishmanial activity |
Authors: | Silva, Everton Macêdo Araújo, Renata M. Freire-Filha, Lindomar G. Silveira, Edilberto R. Lopes, Norberto P. Paula, José Elias de Braz-Filho, Raimundo Espindola, Laila Salmen |
Assunto:: | Clusia pernambucensis Xantonas Tocotrienóis Leishmania (Leishmania) amazonensis |
Issue Date: | 2013 |
Publisher: | Sociedade Brasileira de Química |
Citation: | SILVA, Everton M. et al. Clusiaxanthone and tocotrienol Series from Clusia pernambucensis and their antileishmanial activity. Journal of the Brazilian Chemical Society, v. 24, n. 8, p. 1314-1324. DOI: https://doi.org/10.5935/0103-5053.20130166. Disponível em: https://www.scielo.br/j/jbchs/a/hRKy8dwNcWzG7CZ5FNJBBsk/#. Acesso em: 25 ago. 2022. |
Abstract: | A análise fitoquímica do extrato acetato de etila da casca do caule de Clusia pernambucensis G. Mariz, Clusiaceae, uma espécie do Cerrado brasileiro, conduziu ao isolamento e caracterização completa de uma nova xantona, 1,7-dihidróxi-2-(3-metil-2-butenil)-6',6'-dimetilpirano(2',3':3,4) xantona, denominada clusiaxantona. Quatro tocotrienóis ainda não relatados nesta espécie também foram isolados. Um derivado foi obtido a partir da clusiaxantona, 1-hidróxi,7-metóxi-2-(3-metil2-butenil)-6',6'-dimetilpirano(2',3':3,4)xantona (7-O-metil-clusiaxantona), e um segundo derivado foi obtido a partir do ácido Z- δ -tocotrienolóico. As estruturas foram estabelecidas com base em dados de ressonância magnética nuclear de ¹H e 13C (NMR 1D e 2D), espectrometria de massa com ionização por electrospray de alta resolução (HRESIMS) e espectroscopia no infravermelho. No controle da infecção de macrófagos com amastigotas de Leishmania (Leishmania) amazonensis, os compostos ativos foram clusiaxantona e seu derivado (CI50 = 66,9 e 57,4 µM, respectivamente). A citotoxicidade dos compostos foi determinada em macrófagos peritoneais de camundongos BALB/c. |
Abstract: | Phytochemical analysis of the ethyl acetate extract from the stem bark of Clusia pernambucensis G. Mariz, Clusiaceae, a Brazilian Cerrado species, led to the isolation and full characterization of a new xanthone, 1,7-dihydroxy-2-(3-methyl-2-butenyl)-6',6'-dimethylpyrano(2',3':3,4)xanthone, namely clusiaxanthone. Four previously unreported tocotrienols from this species were also isolated. A derivative was obtained from clusiaxanthone, 1-hydroxy,7-methoxy-2-(3-methyl2-butenyl)-6',6'-dimethylpyrano(2',3':3,4)xanthone (7-O-methylclusiaxanthone), and an additional derivative was obtained from Z- δ -tocotrienoloic acid. The structures of these compounds were established based on data from ¹H and 13C nuclear magnetic resonance (1D and 2D NMR), high resolution electrospray ionization mass spectrometry (HRESIMS) and infrared spectroscopy. The clusiaxanthone and its derivative were able to control macrophage infection by Leishmania (Leishmania) amazonensis amastigotes (IC50 = 66.9 and 57.4 µM, respectively). The cytotoxicity of the compounds was assessed in BALB/c mouse peritoneal macrophages. |
Licença:: | (CC BY NC) This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License. Fonte: https://www.scielo.br/j/jbchs/a/hRKy8dwNcWzG7CZ5FNJBBsk/#. Acesso em: 25 ago. 2022. |
DOI: | https://dx.doi.org/10.5935/0103-5053.20130166 |
Appears in Collections: | Artigos publicados em periódicos e afins |
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