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Background  The aim of this study was to screen various solvent extracts of whole plant of  Torilis leptophylla  to display potent antioxidant activity  in vitro  and  in vivo , total phenolic and flavonoid contents in order to find possible sources for future novel antioxidants in food and pharmaceutical formulations.    Material and methods  A detailed study was performed on the antioxidant activity of the methanol extract of whole plant of  Torilis leptophylla  (TLM) and its derived fractions { n -hexane (TLH), chloroform (TLC) ethyl acetate (TLE)  n -butanol (TLB) and residual aqueous fraction (TLA)} by  in vitro  chemical analyses and carbon tetrachloride (CCl 4 ) induced hepatic injuries (lipid peroxidation and glutathione contents) in male Sprague-Dawley rat. The total yield, total phenolic (TPC) and total flavonoid contents (TFC) of all the fractions were also determined. TLM was also subjected to preliminary phytochemical screening test for various constituents.    Results  The total phenolic contents (TPC) (121.9±3.1 mg GAE/g extract) of TLM while total flavonoid contents (TFC) of TLE (60.9 ±2.2 mg RTE/g extract) were found significantly higher as compared to other solvent fractions. Phytochemical screening of TLM revealed the presence of alkaloids, anthraquinones, cardiac glycosides, coumarins, flavonoids, saponins, phlobatannins, tannins and terpenoids. The EC 50  values based on the DPPH (41.0±1 μg/ml), ABTS (10.0±0.9 μg/ml) and phosphomolybdate (10.7±2 μg/ml) for TLB, hydroxyl radicals (8.0±1 μg/ml) for TLC, superoxide radicals (57.0±0.3 μg/ml) for TLM and hydrogen peroxide radicals (68.0±2 μg/ml) for TLE were generally lower showing potential antioxidant properties. A significant but marginal positive correlation was found between TPC and EC 50  values for DPPH, hydroxyl, phosphomolybdate and ABTS, whereas another weak and positive correlation was determined between TFC and EC 50  values for superoxide anion and hydroxyl radicals. Results of  in vivo  experiment revealed that administration of CCl 4  caused a significant increase in lipid peroxidation (TBARS) while decrease in GSH contents of liver. In contrast, TLM (200 mg/kg bw) and silymarin (50 mg/kg bw) co-treatment effectively prevented these alterations and maintained the antioxidant status.    Conclusion  Data from present results revealed that  Torilis leptophylla  act as an antioxidant agent due to its free radical scavenging and cytoprotective activity.

Antioxidant activity, total phenolic and total flavonoid contents of whole plant extracts Torilis leptophylla L