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. 2011 Dec;164(7):1847–1856. doi: 10.1111/j.1476-5381.2011.01495.x

Table 1.

Pharmacological potency of PF-04418948 in relevant recombinant systems

Antagonist activity Agonist activity
Functional reporter assay KB (nM) IC50 (nM) EC50 (nM)
Human EP2 1.8 (95% CI 0.3–9.3, n = 4) 16 (95% CI 11.7–21.8, n = 22) >33 300 (n = 2)
Human EP1 >10 000 (n = 1) >10 000 (n = 1)
Human EP3 >10 000 (n = 1) >10 000 (n = 1)
Human EP4 >33 300 (n = 2) >33 300 (n = 2)
Human DP1 >32 800 (n = 8) ND
Human CRTH2 32 000 (n = 2) ND
Binding Ki (nM)
Human IP >10 000 (n = 2)
Human FP >10 000 (n = 2)
Human TP >10 000 (n = 2)
Human LTB4 4800 (n = 1)

ND, not determined.