ABSTRACT
Aims: To screen the hepatoprotective and antioxidant activity of ethanol (EDH) and aqueous (ADH) extracts of roots of Doronicum hookeri Hook. f.(Asteraceae). Study design: Animal study Place and Duration of Study: Department of Pharmacology, Biochemistry and Anatomy (Histology section), J N Medical College, AMU, Aligarh, India, between July 2010- July 2012. Methodology: The extracts were subjected to antioxidant tests (Total reducing power and Total phenolic content) and preliminary phytochemical screening. The rats were divided into 7 groups. The Control groups comprising of normal control (Saline 1ml/kg), negative control group (CCl4) and positive control group (Silymarin 50mg/kg). The Test drugs were given in a dose of 300mg/kg and 500 mg/kg for both EDH and ADH extract. Blood was collected for assaying biochemical parameters (AST, ALT, ALP, Total Bilirubin). The liver tissue was used for histopathological examination and in vivo antioxidant tests [Catalase (CAT), Glutathione Reductase (GSH) and Malonlydialdehyde (MDA)]. Results: The phytochemical study showed the presence of flavanoids, alkaloids, saponins, cardiac glycosides. EDH 500mg/kg showed a significant (p<0.01) increased in levels of AST, ALT and ALP as compared to negative while EDH 300 mg/kg (p<.05) and ADH group showed minimal activity. The GSH (p<0.001) and CAT (p<0.05) in EDH 500 mg/kg were significantly increased while MDA levels were decreased (P< 0.01) as compared negative control. The findings were confirmed histopathological examination. Conclusion: The ethanol extract of Doronicum hookeri showed dose dependent partial hepatoprotection against CCl4 toxicity.
ABSTRACT
Aims: To screen the hepatoprotective and antioxidant activity of ethanol extract of roots of Valeriana wallichii DC (Valerianaceae)(VWE). Study Design: Animal study. Place and Duration of Study: Department of Pharmacology, Biochemistry and Anatomy (Histology section), J N Medical College, AMU, Aligarh, India, between July 2010-July 2012. Methodology: The VWE extract was subjected to in vitro antioxidant and phytochemical screening. For in vivo hepatoprotective studies albino rats of either sex were used. For the study, three control groups were taken comprising of the normal control (normal saline), negative control (CCl4) and positive control group (Silymarin 50mg/kg). The test group was given a dose of 300mg/kg and 500mg/kg of VWE extract. Biochemical parameters (Transaminase (AST, ALT), Alkaline Phosphatase (ALP), Total Bilirubin), histopathological examination and in vivo antioxidant tests [Catalase (CAT), Glutathione Reductase (GSH) and Malonlydialdehyde (MDA)] were performed. Results: The phytochemical study of VWE showed the presence flavonoids, terpenoids, tannins, alkaloids and cardiac glycosides. A dose dependent increase in the oxidative potential was observed in the extracts with total phenolic content 66.4GAE/g extract. VWE 500mg/kg and 300mg/kg showed a significant (p<0.001) increased in levels of AST, ALT and ALP as compared to negative control (percentage hepatoprotection=73% and 68% respectively). The GSH (p<0.001) and CAT in VWE 500mg/kg were significantly increased while MDA levels were decreased (P<0.001) as compared negative control. The findings were confirmed histopathological examination. Conclusion: The ethanol extract of Valeriana wallichii showed dose dependent partial hepatoprotection against CCl4induced toxicity.