TABLE 2.
IC50 and IC50,u values for CBD, THC, 11-OH-THC, and COOH-THC against select CYP activities in HLMs
Data represent means ± S.D. of three independent experiments, each conducted in duplicate.
| Enzyme | CBD | THC | 11-OH-THC | COOH-THCa | |||
|---|---|---|---|---|---|---|---|
| IC50 (μM) | IC50,u (μM) | IC50 (μM) | IC50,u (μM) | IC50 (μM) | IC50,u (μM) | IC50 (μM) | |
| CYP1A2 | 3.76 ± 1.44 | 0.45 ± 0.17 | 1.26 ± 0.31 | 0.06 ± 0.02 | 13.49 ± 1.19 | 2.16 ± 0.19 | >50 |
| CYP2C9 | 1.43 ± 0.28 | 0.17 ± 0.03 | 0.23 ± 0.03 | 0.012 ± 0.001 | 2.68 ± 0.92 | 0.43 ± 0.15 | >50 |
| CYP2C19 | 2.58 ± 0.46 | 0.30 ± 0.06 | 11.44 ± 4.44 | 0.57 ± 0.22 | 13.1 ± 1.91 | 2.1 ± 0.31 | >50 |
| CYP2D6 | 7.88 ± 4.14 | 0.95 ± 0.50 | 25.5 ± 4.9 | 1.28 ± 0.25 | 39.2 ± 7.72 | 6.27 ± 1.24 | >50 |
| CYP3A | 3.16 ± 0.96 | 0.38 ± 0.11 | 26.09 ± 6.78 | 1.30 ± 0.34 | >50 | >8 | >50 |
a
Unable to determine because of inability to inhibit by >50% at concentration range tested.