RESUMEN
10 polyphenols were identified from 80% aqueous methanol extract (AME) of Markhamia platycalyx [(Baker) Sprague] leaf. Their structures were characterized as protocatechuic acid (1), E-caffeic acid (2), E-methyl caffeate (3), isoverbascoside (4), verbascoside (5), jacraninoside-I (6), cosmosiin (7), cinaroside (8), luteolin (9) and apigenin (10) based on chemical and extensive spectral studies (UV, ESI-MS, (1)H, (13)C and 1D/2D NMR). Biological evaluation indicated that AME is non-toxic to the experimental animals. It exhibited a significant inhibition of oedema after 1, 2, 3 and 4 h for all examined doses (250, 500 and 1 000 mg/kg). In comparison with silymarin, the AME demonstrated a significant hepatoprotective effect in the form of high reduction in elevated ALT and AST serum levels in regard to paracetamol treated group. As well as, it revealed a marked significant scavenging activity by 62.9, 82.5, 88.3, 83.7 and 83.7%, for the concentrations 20, 40, 60, 80 and 100 mg/ml of the extract, respectively, relative to L-ascorbic acid (86.8%), which was used as a reference antioxidant drug.
Asunto(s)
Antiinflamatorios/farmacología , Antioxidantes/farmacología , Bignoniaceae/química , Extractos Vegetales/farmacología , Hojas de la Planta/química , Polifenoles/farmacología , Sustancias Protectoras/farmacología , Animales , Antiinflamatorios/efectos adversos , Antiinflamatorios/química , Antioxidantes/química , Femenino , Masculino , Ratones , Extractos Vegetales/efectos adversos , Extractos Vegetales/química , Polifenoles/efectos adversos , Polifenoles/química , Sustancias Protectoras/efectos adversos , Sustancias Protectoras/química , RatasRESUMEN
The present study investigated the effect of ethanol extracts of seeds, pericarp and leaves of Eugenia Jamolana (E. Jamolana) on inflammation, gastric ulcer, anti-oxidants and hepatoprotective in rats. The acute inflammation was induced by intra-plantar injection of carrageenan (100 microl of 1 %) in the rat hind paw. Gastric ulcer was evoked by indomethacin (25 mg/kg) oral administration. Liver damage was induced by given CCL4 (2.5 ml/kg) orally. The median lethal (LD(50)) of the ethanol extract of both seeds and pericarp were determined and revealed that the investigated extracts of seeds and pericarp were non toxic up to 5 g/kg. The anti-inflammatory results showed that the oral administration of ethanol extract of E. Jamolana seeds (250, 500 mg/kg) showed significant inhibition of oedema formation in dose-dependent manner by -27.86, -41.23, -44.73, -51.78 % and by -63.16, -37.77, -47.04, -55.36 % at 1, 2, 3 and 4 h at 1, 2, 3 and 4 h, respectively. While the pericarp given at dose (500 mg/kg) exhibited significant inhibition of the oedema formation by -34.64, -21,8, 19.23 and -33.47 % at 1, 2, 3 and 4 h, respectively post carrageenan injection as compared with saline control group. E. Jamolana leaves fraction 1 given orally at dose of 25 mg/kg, induced non significant change on oedema, while the oedema response was significantly inhibited by -25.14, -33.4, -20.57 and -26.46 % at 1, 2, 3 and 4 h, respectively in group of rats that received leaves fraction 2 at the same dose. Rats were given leaves fraction 3 extract showed inhibition of oedema formation by -4.48 % at 1(st) h post- carrageenan injection, while at 2(nd), 3(rd) and 4(th) h showed non significant change on oedema formation. The acute gastric mucosal lesions was significantly reduced by given ethanol extract of E. Jamolana seeds, pericarp (250, 500 mg/kg) and leaves fractions 1, 2 and 3 (25 mg/kg) respectively in dose dependent manner, as compared with indomethacin treated group (control group). All tested extracts showed significant reduction in elevated serum ALT, AST and ALP levels as compared with CCl4 treated group. The ethanol extract of E. Jamolana seeds, pericarp and leaves fractions 1, 2, 3 showed significant elevation of blood GSH level and significant reduction in elevated plasma lipid peroxides (MDA) as compared with CCl4 treated group. In conclusion we can see that the ethanol extracts of E. Jamolana of seeds, pericarp and leaves fractions showed anti-inflammatory, anti-ulcer, hepatoprotective and anti-oxidants activity.