Inhibition of coumarin 7-hydroxylase activity of CYP2A6 by organosulfur compounds
| Chemicals | Residual Activity | |
|---|---|---|
| 1 μM | 10 μM | |
| % | ||
| Dimethyl sulfide | 95.7 | 98.4 |
| Dimethyl disulfide | 93.7 | 94.1 |
| Diethyl sulfide | 93.6 | 89.4 |
| Diethyl disulfide | 99.2 | 79.6 |
| Di-n-propyl sulfide | 96.9 | 83.4 |
| Di-n-propyl disulfide | 85.0 | 39.5 |
| Di-n-butyl sulfide | 100 | 82.0 |
| Di-n-butyl disulfide | 87.5 | 43.9 |
| Di-n-amyl sulfide | 103 | 88.8 |
| Di-n-amyl disulfide | 100 | 66.3 |
| Diallyl sulfide | 97.2 | 91.3 |
| Diallyl disulfide | 89.7 | 46.2 |
| Allyl methyl sulfide | 99.8 | 97.6 |
| Allyl n-propyl sulfide | 102 | 94.2 |
| Allyl phenyl sulfide | 84.7 | 32.8 |
| Diphenyl sulfide | 84.7 | 46.1 |
| Diphenyl disulfide | 97.5 | 65.7 |
| Phenyl cyclopropyl sulfide | 98.0 | 42.1 |
| Difurfuryl disulfide | 94.1 | 69.1 |
| 2,2′-Dipyridyl disulfide | 98.7 | 97.0 |
| 4,4′-Dipyridyl sulfide | 20.6 | 3.22 |
| 4,4′-Dipyridyl disulfide | 15.9 | 2.26 |
| Tranylcypromine | 48.9 | 12.9 |
| SM-12502 | 98.1 | 85.9 |
| (−)-Nicotine | 104 | 98.1 |
| (−)-Cotinine | 101 | 96.2 |
Concentration of coumarin was 2.5 μM. The control activity of CYP2A6 determined in the absence of an organosulfur compound was 3.76 nmol/min/nmol of CYP.