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Context: Blepharis maderaspatensis L. Roth (BM) (Acanthaceae) and Ammannia baccifera L. (AB) (Lythraceae) are used in folk medicine for various stomach disorders.
Objective: The chloroform and ethanol extracts of both plants were evaluated for antioxidant, gastric antisecretory, and gastroprotective properties.
Methods: Antioxidant properties of the extracts were evaluated using 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging assay and nitric oxide (NO) scavenging assay. The gastric antisecretory properties of the extracts were assessed, at a dose of 100 and 200 mg/kg, using aspirin-pylorus ligation induced gastric ulcer models and the gastroprotective activity of the extracts was assessed, at a dose of 100 and 200 mg/kg, using HCl-ethanol induced ulcer models in rats.
Results And Discussion: Ethanol extract of BM (EBM) possessed good antioxidant property with IC₅₀ values of 37.4 and 44.1 µg/mL in DPPH and NO scavenging assays respectively, where 25-250 µg/mL concentration in DPPH assay and 30-300 µg/mL concentration in NO scavenging assay were used. Ethanol extract of AB (EAB) at a dose of 200 mg/kg reduced the free acidity to 142.66 mEq/L and total acidity to 451.22 mEq/L. It reduced the gastric secretion with increase in pH from 2.2 to 3.15. Possessing good antisecretory activity, it also reduced the ulcer by 92.2% in aspirin and pylorus ligation induced gastric ulcer models. EAB increased the mucus secretion and adherent mucus in the tissues with a 71.43% reduction of ulcerin HCl-ethanol induced ulcer models, at a dose of 200 mg/kg. This activity can be attributed to the various flavonoids like rutin and kaempferol-3-O-β-glucopyranoside, and the phytosterol, β-sitosterol-3-O-β-glucopyranoside, and phenolics present in the extracts.
Conclusion: EBM possessed significant antioxidant property while EAB possessed good antisecretory and gastroprotective activity.
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| http://dx.doi.org/10.3109/13880209.2012.657305 | DOI Listing |
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