Rofecoxib罗非考昔,162011-90-7

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Rofecoxib

CAS No. : 162011-90-7

MCE 国际站：Rofecoxib

产品活性：Rofecoxib 是一种有效的，可口服的 COX-2 特异性抑制剂，在人骨肉瘤细胞和中国仓鼠卵巢细胞中，对人 COX-2 的 IC₅₀ 值分别为 26 和 18 nM；Rofecoxib 对 COX-2 的选择性是对人 COX-1 的 1000 倍，在 U937 细胞和中国仓鼠卵巢细胞中，IC₅₀ 值分别为 >50 μM 和 >15 μM。

研究领域：Immunology/Inflammation

作用靶点：COX

In Vitro: Rofecoxib (MK-0966) is a potent and orally active inhibitor of COX-2, with IC₅₀s of 26 and 18 nM for human COX-2 in human osteosarcoma cells and Chinese hamster ovary cells, with a 1000-fold selectivity for COX-2 over COX-1 (IC₅₀ >50 μM in U937 cells and >15 μM in Chinese hamster ovary cells). Rofecoxib time dependently inhibits purified human recombinant COX-2 (IC₅₀=0.34 μM) but suppresses purified human COX-1 in a non-time-dependent manner that can only be observed at a very low substrate concentration (IC₅₀=26 μM at 0.1 μM arachidonic acid concentration). Rofecoxib selectively inhibits lipopolysaccharide-induced, COX-2-derived PGE(2) synthesis with an IC₅₀ value of 0.53 ± 0.02 μM compared with an IC₅₀ value of 18.8 ± 0.9 μM for the inhibition of COX-1-derived thromboxane B(2) synthesis after blood coagulation. Rofecoxib (36 μM) causes a cell proliferation of 68% in MPP89, of 58% in Ist-Mes-1 and 40% in Ist-Mes-2. MSTO-211H and NCI-H2452 treated with 36 μM of Rofecoxib have a survival of 97% and 90% respectively. Rofecoxib (36 μM) decreases COX-2 and mRNA levels in Ist-Mes-1, Ist-Mes-2 and MPP89 cell lines.

In Vivo: Rofecoxib potently inhibits carrageenan-induced paw edema (ID₅₀=1.5 mg/kg), carrageenan-induced paw hyperalgesia (ID₅₀=1.0 mg/kg), lipopolysaccharide-induced pyresis (ID₅₀=0.24 mg/kg), and adjuvant-induced arthritis (ID₅₀=0.74 mg/kg/day) in rodent models. Rofecoxib also protects adjuvant-induced destruction of cartilage and bone structures in rats. In a ⁵¹Cr excretion assay for detection of gastrointestinal integrity in either rats or squirrel monkeys, rofecoxib shows no effect at doses up to 200 mg/kg/day for 5 days. Rofecoxib (15 mg/kg, i.p.) reduces the blood vessels attached to the internal limiting membrane (ILM) in mice. COX-2 and VEGF protein expressions, COX-2 mRNA and VEGF mRNA are also significantly decreased by Rofecoxib in ROP mice.

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