| Cell Research: |
| PLoS One,2011;6(9):e25132. | | The dual PI3K/mTOR inhibitor NVP-BEZ235 induces tumor regression in a genetically engineered mouse model of PIK3CA wild-type colorectal cancer.[Pubmed: 21966435] | Cell lines:HCT116, DLD-1 and SW480 cells
Concentrations: 0-1 μM
Incubation Time: 48 hours
Method:
The human CRC cell lines, HCT116 (PIK3CA mutant; kinase domain at H1047R), DLD-1 (PIK3CA mutant; helical domain at E545K), and SW480 (PIK3CA wild-type) and isogenic DLD-1 PIK3CA mutant as well as wild-type cells are maintained in DMEM with 10% FBS and 1 × Penicillin/Streptomycin. Cells are plated at different initial densities (HCT116: 3 × 103 cells/well, DLD-1: 5.5 × 103 cells/well, SW480: 4.5 × 103 cells/well, DLD-1 PIK3CA mutant: 7 × 103 cells/well, and DLD-1 PIK3CA wild-type: 9 × 103 cells/well) to account for differential growth kinetics. After 16 hours, cells are incubated with increasing concentrations of BEZ235, and the drug-containing growth medium is changed every 24 hours. Cell viability is assessed 16 hours after the initial plating and 48 hours after initiation of drug treatment using the colorimetric MTS assay CellTiter 96® AQueous One Solution Cell Proliferation Assay, as per the manufacturer's instructions. Cell viability after drug treatment is normalized to that of untreated cells also grown for 48 hours. For western blot analysis, cells are plated with zero or maximum inhibitory dose (500 nM) BEZ235 for 2, 6, 24, or 48 hours.
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