The wound healing potency of ethanol leaf extracts of V. trifolia L. and V. altissima L. was evaluated in excision, incision and dead space wound models. Both plants were found to possess significant wound healing activity which was evidenced by a decrease in the period of epithelialization, an increase in the rate of wound contraction, skin breaking strength, granulation tissue dry weight, hydroxyproline content and breaking strength of granulation tissue. Histopathological study of the granulation tissue also showed an increased collagenation when compared with the control group of animals. Of the two extracts, the ethanol leaf extract of V. trifolia showed maximum wound healing activity compared with the leaf extract of V. altissima. However, on comparison with the control group, both leaf extracts were found to possess significant wound healing potency.
Objective: To evaluate the hepatoprotective activity of Pterocarpus marsupium stem bark extracts against carbon tetrachloride (CCl 4)-induced hepatotoxicity. Materials and methods: Hepatotoxicity was induced in male Wistar rats by intraperitoneal injection of CCl 4 (0.1 ml/kg/day for 10 days). Methanol and aqueous extracts of P. marsupium stem bark were administered to the experimental rats (25 mg/kg/day, p.o. for 14 days). The hepatoprotective effect of these extracts was evaluated by the assay of liver function biochemical parameters (total bilirubin, serum protein, alanine aminotransaminase, aspartate aminotransaminase, and alkaline phosphatase activities) and histopathological studies of the liver. Results: In methanol extract-treated animals, the toxic effect of CCl 4 was controlled significantly by restoration of the levels of serum bilirubin, protein and enzymes as compared to the normal and the standard drug silymarin-treated groups. Histology of the liver sections of the animals treated with the extracts showed the presence of normal hepatic cords, absence of necrosis and fatty infiltration, which further evidenced the hepatoprotective activity. Conclusion: Methanol extract of the stem bark of P. marsupium possesses significant hepatoprotective activity.
Various 7-chloro-6-fluoro-2-arylidenylaminobenzo(1,3)thiazole (2a-h) have been synthesized by the condensation of 7-chloro-6-fluoro-2-aminobenzo(1,3)thiazole (1) with different aromatic aldehydes. The Schiff's bases on reaction with acetyl chloride, chloroacetyl chloride and phenyl acetyl chloride yielded 1-(7-chloro-6-fluorobenzothiazol-2-yl)-3,4-substituted-aryl-azetidin-2-ones (3a-x). Similarly, cyclization of Schiff's base with thioglycolic acid furnished 3-(7-chloro-6-fluoro-benzothiazol-2-yl)-2-substituted–arylthiazolidin-4-ones (4a-h). The structures of the newly synthesized compounds have been established on the basis of their spectral data and elemental analysis. Some selected compounds were evaluated for antiinflammatory, analgesic, CNS depressant and skeletal muscle relaxant activity.
To evaluate the wound healing activity of the leaf extracts and deoxyelephantopin isolated from Elephantopus scaber Linn. Materials and Methods: The effect of aqueous ethanol extracts and the isolated compound deoxyelephantopin from E. scaber Linn. (Asteraceae) was evaluated on excision, incision, and dead space wound models in rats. The wound-healing activity was assessed by the rate of wound contraction, period of epithelialization, skin-breaking strength, weight of the granulation tissue, and collagen content. Histological study of the granulation tissue was carried out to know the extent of collagen formation in the wound tissue. Results: The ethanol extract and the isolated constituent deoxyelephantopin of E. scaber promoted wound-healing activity in all the three wound models. Significant (P<0.01) increase in the rate of wound contraction on day 16 (98.8%, P<0.01), skin-breaking strength (412 g, P<0.01), and weight of the granulation tissue on day 10 (74 mg/100 g, P<0.01) were observed with deoxyelephantopin-treated animals. In ethanol extract-treated animals, the rate of wound contraction on day 16, skin-breaking strength, and weight of the granulation tissue on day 10 (P<0.01) were 92.4%, 380 g, and 61.67 mg/100 g, respectively. Histological studies of the granulation tissue also evidenced the healing process by the presence of a lesser number of chronic inflammatory cells, lesser edema, and increased collagenation than the control. Conclusion: The wound-healing activity was more significant in deoxyelephantopin-treated animals.
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