Comparative phytochemical, hepatoprotective and antioxidant activities of various samples of Swertia chirayita collected from various cities of Pakistan

ABSTRACT

Medicinal plants are crucial for about 80% of the world population in developing and developed countries for their primary and basic health care needs owing to better tolerability, superior compatibility with human body and having lesser side effects. The present study was conducted on various solvent extracts of three plant samples of Indian and Nepali origin Swertia Chirayita [Roxb.] Buch-ham [Chiratia] collected from various places to establish their comparative phytochemical analysis, chromatographic profile, hepatoprotective and antioxidant activities. Nepali Swertia Chirayita was found to have finest Chromatographic profile [TLC]. Phytochemical analysis revealed Alkaloids, flavonoids, saponins, ascorbic acid, glycosides, steroids and triterpenoids in all samples. Different solvent fractions of the methanolic plant extracts of Swertia chirayita were assessed for hepatoprotective activity by carbon tetrachloride-induced liver damage in rats. The grade of protection was measured by using biochemical parameters such as serum glutamate oxalate transaminase [SGOT/AST], alkaline phosphatase [ALP], serum glutamate pyruvate transaminase [SGPT/ALT] and total bilirubin. The in-vitro antioxidant activity of the extracts was also evaluated by the 1, 1-diphenyl-2-picrylhydrazyl [DPPH] free radical scavenging assay. The methanolic and aqueous extracts, at a dose of 200 mg/kg and 300 mg/kg, produced significant [P<0.05] hepatoprotection by decreasing the activities of the serum enzymes and bilirubin while there were marked scavenging of the DPPH free radicals by the fractions. Decreased observed in the biochemical parameters suggests that the plant extracts possesses hepatoprotective as well as antioxidant activities without any significant variation amongst them. These activities reside mainly in the methanolic extract of whole plant