Cell Migration/Invasion Assay
For in-vitro assessment of metastasis, migration and invasion
assays were performed using a matrigel invasion chamber. The matrigel coated plates were rehydrated in warm DMEM serum-free medium for 2 hrs at 37C. Cells in serum-starved media were seeded at the density of 5x104cells/well in 6-well inserts with 8mm pore polycarbonate membranes for migration and in matrigel-coated inserts for invasion, and chemoattractant (DMEM with 10% FBS) was added in the plate chamber. Cells wereincubated in 5% CO2atmosphere at 37C for 24 hrs. Non-invading cells were removed from the upper surface of the membrane by scraping using cotton swabs and cells which invaded through the matrigel to the bottom of the insert were fixed and stained with Diff-Quick cell staining kit and mounted on slide.
Cells were observed under microscope and photographed using Nikon Eclipse TE 2000-U (Nikon Instruments Inc., Melville, NY).Ten random fields of view for each well were quantified by counting the cells in each field and averaging the results for each condition.