rifampicin (rif), TCPOBOP, and PK11195 were obtained from Sigma-Aldrich
(St. Louis, Missouri, United States, now Merck), which is now known
as Merck (Darmstadt, Germany). Phenobarbital (Luminal 200 mg/mL injection)
was manufactured by Desitin Pharma spol. s.r.o. (Prague, Czech Republic).
Ligands for nuclear receptors (GW3965, thyroxin, obeticholic acid,
dexamethasone, fenofibrate, GW501516, rosiglitazone, 3-methylcholanthrene,
calcitriol, testosterone, and estradiol) were purchased from Sigma-Aldrich
(now Merck). The prototype ligands were used at 100 nM (dexamethasone,
calcitriol), 1 μM (thyroxin), or 10 μM concentrations.
The compounds were dissolved in DMSO, and the final concentration
of DMSO in the entire reaction mixture or cultivation media was 0.1%.