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CI-1044

CAS No. : 197894-84-1

MCE 站：CI-1044

产品活性：CI-1044 是一种口服有效的 PDE4 抑制剂， 对 PDE4A5，PDE4B2，PDE4C2 和 PDE4D3 的 IC₅₀ 值分别为 0.29, 0.08, 0.56, 0.09 μM。

研究领域：Metabolic Enzyme/Protease

作用靶点：Phosphodiesterase (PDE)

In Vitro: CI-1044 is an orally active PDE4 inhibitor with IC₅₀s of 0.29, 0.08, 0.56, 0.09 μM for PDE4A5, PDE4B2, PDE4C2 and PDE4D3, respectively. CI-1044 selectively inhibits PDE4 crude extract from U937 cells with an IC₅₀ value of 0.27±0.02 μM being threefold more potent than rolipram (IC₅₀=0.91±0.14) and tenfold less potent than cilomilast (IC₅₀=0.026±0.007) in the same assay. In the presence of PDE4 inhibitors, the production of TNF-α is dose dependently decreased with mean IC₅₀ values from three separate experiments of 0.31±0.05, 0.26±0.05 and 0.11±0.01 μM, for CI-1044, cilomilast and rolipram, respectively.

In Vivo: TNF-α production is dose-dependently inhibited by CI-1044, rolipram and cilomilast with ID₅₀s of 0.4, 1.4 and 1.6 mg/kg respectively following single oral administration. Following repeated administration with CI-1044, the ID₅₀ value represents 0.5 mg/kg p.o.. CI-1044 plasma levels increase proportionally with doses ranging between 0.1 and 40 mg/kg p.o. (R2=0.878). CI-1044 dose dependently inhibits the accumulation of eosinophils in Bronchoalveolar lavages (BAL) fluids with an ID₅₀ value of 3.25 mg/kg. A single dose treatment with CI-1044 (10 mg/kg, p.o.) 24, 8, 3 or 1 h before the antigen challenge induces 6, 56, 48 and 79% inhibition in the number of eosinophils in BAL.

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