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P2X7 inhibitors were tested on ATP signaling and migration. Total- and phospho-ERK1/2 levels were determined in western blot.Results Tβ4 enhanced HCEC proliferation and migration in a dose- and time-dependent manner. Moreover, these functions were related to increased extracellular ATP levels, intracellular Ca2+ influx, and ERK1/2 phosphorylation. Tβ4-mediated HCEC migration was inhibited by specific P2X7 purinergic receptor antagonists suggesting the role of this receptor in Tβ4-mediated human corneal epithelial cell migration.Conclus