TABLE 3

Ludi scores, theoretical Ki values (micromolar; Ludi score = -100 log Ki), and mean experimental Ki values (micromolar) for inhibition of CYP2C9-mediated diclofenac 4′-hydroxylase by flavonols and flavones in the RECO CYP2C9 system


Compound

Ludi Score

Theoretical Ki

Experimental Ki (RECO CYP2C9)
6-Hydroxyflavone 563a 2.34a 2.2a
Quercetin 578 1.66 2.0
Luteolin 587 1.35 1.3
Baicalein 596 1.10 0.9
Apigenin 640 0.398 2.0
Morin
641
0.389
1.8
  • a Noncompetitive inhibition; in all other situations, competitive inhibition.