Name | CI-1044 |
Synonyms | CI-1044 PD-189659 CI-1044(CI1044) 3-Pyridinecarboxamide, N-[(3R)-9-amino-3,4,6,7-tetrahydro-4-oxo-1-phenylpyrrolo[3,2,1-jk][1,4]benzodiazepin-3-yl]- |
CAS | 197894-84-1 |
Molecular Formula | C23H19N5O2 |
Molar Mass | 397.43 |
Storage Condition | Room Temprature |
In vitro study | CI-1044 is an orally active PDE4 inhibitor with IC 50 s 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 IC 50 value of 0.27±0.02 μM being threefold more potent than rolipram (IC 50 =0.91±0.14) and tenfold less potent than cilomilast (IC 50 =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 IC 50 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 study | TNF-α production is dose-dependently inhibited by CI-1044, rolipram and cilomilast with ID 50 s of 0.4, 1.4 and 1.6 mg/kg respectively following single oral administration. Following repeated administration with CI-1044, the ID 50 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 ID 50 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. |
biological activity | CI-1044 is an orally effective PDE4 inhibitor for PDE4A5,PDE4B2, the IC50 values for PDE4C2 and PDE4D3 were 0.29, 0.08, 0.56, and 0.09 μm, respectively. |