Data/hora: 09/06/2024 03:50:35

Provedor de dados: | Brazilian Journal of Medical and Biological Research
País: | Brazil
Título: | Antitrichomonal and antioxidant activities of Dorstenia barteri and Dorstenia convexa
Autores: | Omisore,N.O.A.; Adewunmi,C.O.; Iwalewa,E.O.; Ngadjui,B.T.; Adenowo,T.K.; Abegaz,B.M.; Ojewole,J.A.; Watchueng,J.
Data: | 2005-07-01
Ano: | 2005
Palavras-chave: | Dorstenia species; Antitrichomonal; Antioxidant activity; Prenylated flavonoids.
Resumo: | Dorstenia barteri and D. convexa extracts and some isolated components of the former were investigated for effectiveness against Trichomonas gallinarum and compared with quercetin and quercitrin. The antioxidant activity of the extracts/compounds was also determined. The minimum lethal concentrations (MLCs) for the extract of D. barteri leaves and twigs at 24 h were found to be 15.625 and 15.625 µg/ml, respectively. However, the MLCs of the leaf and twig extract of D. convexa were 125 and 437.5 µg/ml, respectively. The prenylated and geranylated chalcones were as active as the prenylated flavones, 6-prenylapigenin and the diprenylated derivative 6,8-diprenyleridictyol. The order of the antitrichomonal activity of the compounds at 24 h was: quercetin (0.121 µg/ml) &gt; quercitrin (0.244 µg/ml)  &gt; or =  bartericin B (0.244 µg/ml) &gt; bartericin A (0.73 µg/ml) &gt; stigmasterol (0.98 µg/ml) &gt; 6,8-diprenyleridictyol = isobavachalcone = dorsmanin F (31.25 µg/ml). D. barteri extracts, quercitrin, and bartericin A, and the prenylated flavonoids had potent antioxidant properties. The twig extract of D. barteri was more potent than the leaf extract. Moderate (EC50 &gt;50 µg/ml) and high (EC50 &lt;50 µg/ml) antioxidant activities were detected in the leaf and twig extracts of D. barteri and the prenylated flavonoids. Prenylated flavonoids and the isolated compounds with antioxidant properties described here may account for the anti-inflammatory action of these extracts. The antitrichomonal and antioxidant activities shown by the extracts and compounds in this study are consistent with the ethnomedicinal and local use of the Dorstenia species studied.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2005000700012
Editor: | Associação Brasileira de Divulgação Científica
Relação: | 10.1590/S0100-879X2005000700012
Formato: | text/html
Fonte: | Brazilian Journal of Medical and Biological Research  v.38 n.7 2005
Fonte: | info:eu-repo/semantics/openAccess