Résumé
The chemical composition of Mangifera indica L. cv. "Kent" leaves was determined by HPLC-ESI-QTOF-MS/MS. Polyphenolic compounds characterized as benzophenone derivatives were the main components found in extracts (1, maclurin 3-C-(2-O-galloyl)-D- glucoside isomer; 2, maclurin 3-C-ï¢--D-glucoside; 3, iriflophenone 3-C-ï¢--D-glucoside; 5, maclurin 3-C-(2,3-di-O-galloyl)-ï¢--D-glucoside; 6, iriflophenone 3-C-(2-O-galloyl)-ï¢--D-glucoside; 7, methyl-iriflophenone 3-C-(2,6-di-O-galloyl)-ï¢--D-glucoside) and xanthones (4, mangiferin and 8, 6-O-galloyl-mangiferin). The estrogenic and antioxidant effects of aqueous extracts from Mangifera indica L. cv. "Kent" leaves on ovariectomized rats were determined by uterotrophic assay and malondialdehyde (MDA) levels in erythrocytes, bone, liver, and stomach. We conclude that the polyphenolic compounds from extracts act as exogenous antioxidant agents against oxidative damage in ovariectomized rats.
La composicioÌn quiÌmica de las hojas de Mangifera indica L. cv. "Kent" se determinoÌ por HPLC-ESI-QTOF-MS/MS. Compuestos polifenoÌlicos caracterizados como derivados de benzofenona fueron los componentes principales encontrados en los extractos (1, isoÌmero de la maclurina 3-C-(2-O-galoyil)-D-glucoÌsido; 2, maclurina 3-C-ß-D-glucoÌsido; 3, iriflofenona 3-C-ß-D-glucoÌsido; 5, maclurina 3-C-(2,3-di-O-galloiÌl)-ß-D-glucoÌsido; 6, iriflofenona 3-C-(2-O-galloil)-ß-D-glucoÌsido; 7, metil-iriflofenona 3-C-(2,6-di-O- galloyl)-ß-D-glucoÌsido) y xantonas (4, mangiferina y 8, 6-O-galoyil-mangiferina). Los efectos estrogeÌnicos y antioxidantes de los extractos acuosos de hojas de Mangifera indica L. cv. "Kent" en ratas ovariectomizadas se determinaron mediante ensayo uterotroÌfico y la medicioÌn de los niveles de malondialdehiÌdo (MDA) en eritrocitos, huesos, hiÌgado y estoÌmago. Concluimos que los compuestos polifenoÌlicos de los extractos actuÌan como agentes antioxidantes exoÌgenos contra el danÌo oxidativo en ratas ovariectomizadas.