title: Evaluation of In Vitro Cytotoxic and Antioxidant Activity of Datura metel Linn. and Cynodon dactylon Linn. Extracts.
abstract: OBJECTIVE
  To evaluate in vitro cytotoxicity and antioxidant activity of Datura metel L. and Cynodon dactylon L. extracts.
  
  
  METHODS
  The extraction of plants parts (datura seed and fruit pulp) and areal parts of durva was carried out using soxhlet and cold extraction method using solvents namely methanol and distilled water. The total phenolic content (TPC) and total flavonoid content (TFC) was determined by established methods. The in vitro cytotoxicity assay was performed in vero cell line by 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide assay method. In vitro antioxidant activity of the extract was performed by 2, 2-diphenyl-1-picrylhydrazyl radical scavenging method.
  
  
  RESULTS
  We found that the highest amount of TPC and TFC in methanolic extracts of seed (268.6 μg of gallic acid equivalence/mg of dry plant material) and fruit pulp (8.84 μg of quercetin equivalence/mg dry plant material) of D. metel, respectively prepared by Soxhlet method. The methanolic extract of C. dactylon prepared using soxhlation has shown potent free radical scavenging activity with 50% inhibitory concentration (IC50) value of 100 μg/ml. The IC50 of a methanolic cold extract of datura fruit was found to be 3 mg/ml against vero cell line.
  
  
  CONCLUSIONS
  We observed that plant parts of C. dactylon and D. metel have a high antioxidant activity. Further research is needed to explore the therapeutic potential of these plant extracts.
  
  
  CONCLUSIONS
  In the present study we observed a positive correlation was between the phenolic and flavanoid content of the Datura metel and cynodon doctylon (durva) extracts with the free radical scavenging activities. Both were found to have a high antioxidant activity. Abbreviations used: BHA: Butylated hydroxyanisole, BHT: Butylated hydroxytoluene, CC50: 50% cell cytotoxic concentration, CNS: Central nervous system, DPPH: 2, 2-diphenyl-1-picrylhydrazyl, IC50: 50% inhibitory concentration, MTT: 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide), TFC: Total flavonoid content, TPC: Total phenolic content.
authors.affiliation: Department of Virology, Haffkine Institute for Training, Research and Testing, Parel, Mumbai, Maharashtra, India.
authors.forename: Soumen
authors.initials: S
authors.lastname: Roy
authors.affiliation: Department of Biochemistry, The Institute of Science, Fort, Mumbai, Maharashtra, India.
authors.forename: Sandip
authors.initials: S
authors.lastname: Pawar
authors.affiliation: Department of Virology, Haffkine Institute for Training, Research and Testing, Parel, Mumbai, Maharashtra, India.
authors.forename: Abhay
authors.initials: A
authors.lastname: Chowdhary
keywords: 2; 2-diphenyl-1-picrylhydrazyl radical; Antioxidant; Cytotoxicity; Total flavonoid content; Total phenolic content