was performed as we described previously [49 (link)] with few minor modifications. 1.5 x 106 cells/ml were seeded on top of the gelatinized microporous membrane (8μm pore size, 6.5 mm Corning insert). After two hours, serum-free media was added to the bottom part of the well and incubated at 37°C overnight. Migrated cells were then fixed and stained using the Diff-Quick staining kit (Dade Behring, Deerfield, IL) and counted in 10 high-powered fields (100X).
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