HeLa and H357 cell lines were procured and were further subdivided into 2 subdivisions and were assigned interventions:

Mangosteen group- cells treated with mangosteen extract and Camptothecin group - cells treated with standard anticancer drug camptothecin(25 micro mole)

H357 and HeLa cell line without any drug intervention.

For Mangosteen group :DNA fragmentation assay is used to identify apoptosis.1×106 cells were harvested and treated with mangosteen pericarp extract for 48 h For Camptothecin group : Cells were also treated with standard anticancer drug Camptothecin to act as a positive control.

Apoptosis assay was performed using Annexin V/FITC Kit (BD Biosciences, Catalog no. 556547), and the fluorescence intensities of FITC-conjugated annexin-V and Propidium iodide (PI) in cells were analyzed using flow cytometry. HeLa and H357 cells (1×106 cells/well) were seeded in a 6-well plate. The cells were allowed to adhere for 12 hrs, cultured in medium containing different concentrations of mangosteen extract for 48hr. The cells were then collected and washed twice with Phosphate buffer Saline, gently resuspended in 100μL annexinV-FITC binding buffer (1x) and incubated with 5μL annexinV-FITC in the dark for 10 min at 25°C. This was followed by centrifugation of cells at 2000 rpm for 5 min, and gently resuspended in 500μL annexinV-FITC binding buffer (1x) and 5μL PI was added in an ice bath, followed by immediate analysis by flow cytometry Cell Quest software (BD Biosciences).