FICZ (6-Formylindolo[3,2-b]carbazole) is a highly potent ligand of the cytosolic aryl hydrocarbon receptor (AhR) transcription factor.
The presence of FICZ-derived metabolites in human urine points FICZ to be an endogenous AhR agonist, but which requires diet-derived tryptophan (Trp) amino acid . FICZ synthesis results from Trp conversion upon UV-dependent photo-oxidation or H2O2-mediated oxidative stress [2,3].
InvivoGen's FICZ is a high-quality product (>95% purity) and is guaranteed free of bacterial contamination. Each lot of FICZ is functionally tested in cellular assays using HepG2-Lucia™ AhR and HT29-Lucia™ AhR reporter cells.
Other AhR ligands, as well as an AhR antagonist, are also available.
- Wincent E. et al., 2009. The suggested physiologic aryl hydrocarbon receptor activator and cytochrome P4501 substrate 6-formylindolo[3,2-b]carbazole is present in humans. J. Biol. Chem. 284:2690-96.
- Rannug A. et al., 1987. Certain photooxidized derivatives of tryptophan bind with very high affinity to the Ah receptor and are likely to be endogenous signal substances. J. Biol. Chem. 262:15422-27.
- Smirnova A. et al., 2018. Evidence for new light-independent pathways for generation of the endogenous aryl hydorcarbon receptor agonist FICZ. Chem. Res. Toxicol. 29:75-86.