Evalution of anti-ulcer activity of Polyalthia longifolia (Sonn.) Thwaites in experimental animals

Objective:

To evaluate the anti-ulcer activity of ethanol extract of leaves of Polyalthia longifolia (Sonn.) Thwaites.

Materials and Methods:

The ethanol extract of Polyalthia longifolia was investigated for its anti-ulcer activity against aspirin plus pylorous ligation induced gastric ulcer in rats, HCl -Ethanol induced ulcer in mice and water immersion stress induced ulcer in rats at 300 mg/kg body weight.p.o.

Results:

A significant (P < 0.01, P < 0.001) anti ulcer activity was observed in all the models. Pylorous ligation showed significant (P< 0.01) reduction in gastric volume, free acidity and ulcer index as compared to control. It also showed 89.71% ulcer inhibition in HCl- Ethanol induced ulcer and 95.3% ulcer protection index in stress induced ulcer.

Conclusion:

This present study indicates that P. longifolia leaves extract have potential anti ulcer activity in the three models tested.

Anti-ulcer activity of crude alcoholic extract of Toona ciliata Roemer (heart wood)

The ethanol extract of Toona ciliata Roemer (heart wood) was evaluated for its anti-ulcer activity against aspirin plus pylorous ligation induced gastric ulcer (antisecretory), HCl-ethanol induced ulcer (cytoprotective) and water immersion stress induced ulcer in rats. We found that Toona ciliata extract at a dose of 300mg/kg p.o. markedly decrease the incidence of ulcers in all the three models. Ethanol extract of Toona ciliata showed significant reduction in gastric volume, free acidity, total acidity and ulcer index. The plant extract also showed gastro protective activity (52.94%), whereas standard drug sucralfate showed 94.85%. Toona ciliata extract showed protection index 43.0% in water immersion stress induced ulcer, whereas standard drug omeprazole showed protection index 100%.

Analgesic activity of some Indian medicinal plants

In the present study of some of the Indian medicinal plants Sida acuta whole plant (Malvaeae), Stylosanthes fruticosa (whole plant) (Papilionaceae), Toona ciliata (heart wood) (Meliaceao), Bougainvilla spectabilis (leaves) (Nyctaginaceae), Ficus glomerata (bark, leaves) (Moraceae) and Polyalthia longifolia (leaves) (Annonaceae). The different plants were used in folklore medicine in the treatment of toothache and strengthening of gums, anthelmintic, kidney diseases, analgesic, anti-inflammatory, hepatoprotective, antihyperglycaemic, antihyperglycaemic and anticancer. The extract was prepared using powdered material with ethanol, concentrated under vacuo and were evaluated for analgesic activity by analgesiometer at three dose level (100, 300 and 500mg/kg). Analgesic activity was significant with Toona ciliata (heart wood) ethanolic extract when compared with other extracts and its activity was confirmed by tail immersion method.