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Correlation of PGE2 with the caspase 3-iPLA2 pathway in the stimulation of U87MG proliferation induced by dying ECs. (A) Level of PGE2 in ECs under various conditions (*P<0.05). PGE2 concentrations were evaluated using an ELISA kit. (B) Effect of adding PGE2 into culture medium on the growth promotion of U87MG cells (*P<0.05, between days 2 and 8). All error bars represent SEM, n=4. PGE2, prostaglandin E2; iPLA2, calcium-independent phospholipase A2; EC, endothelial cell.
