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COX-2 Luciferase activity (A) and mRNA expression (B) in FPS cells in response to treatment with 100 nM PGE2 or 100 nM PGF2α for 0, 2, 4, 6, 8 and 24 h. Data are presented as mean ± S.E.M. b is significantly different from a, c is significantly different from a and b; P < 0.05.
