SC 58125

SC-58125 is a selective cyclooxygenase 2 (COX-2) inhibitor, with an IC50 of 0.04 μM. SC-58125 exhibits antitumor activity in vitro and in vivo, and it also can inhibit edema at the inflammatory site and is analgesicSC-58125 treatment on the growth of human colon carcinoma cells in nude mice. Delaying treatment by 2, 4, or 7 weeks following implantation of the carcinoma cells resulted in a significant inhibition of tumor growth. Furthermore, short-term (48 hours) treatment with SC-58125 was sufficient to attenuate tumor growth for up to 15 days. SC-58125 treatment did not alter the rate at which cells underwent apoptosis, but did result in a delayed progression through the cell cycle at the G (2) /M transition. Accordingly, p34 (cdc2) protein levels and activity were decreased following SC-58125 treatment.SC-58125 primarily exerts a cytostatic effect in vivo, which is likely to be mediated through inhibition of progression through the G (2) /M phase of the cell cycle.