The olfactory neuroepithelium, which lines the posterior nasal cavity, is exposed to a wide range of odorants and airborne toxic compounds. Odorants, which are mostly small lipophilic molecules, enter the mucus flow and reach the odorant receptors on sensory neurons. Odorant sensing is generally a transient process, requiring an effective signal termination, which could be provided by biotransformation of the odorant in the epithelial supporting cells. Xenobiotic-metabolizing enzymes in the olfactory epithelium have been suggested to catalyze inactivation and facilitate elimination of odorants.
Iida A, Saito S, Sekine A, et al. (2002). "Catalog of 86 single-nucleotide polymorphisms (SNPs) in three uridine diphosphate glycosyltransferase genes: UGT2A1, UGT2B15, and UGT8.". J. Hum. Genet.47 (10): 505–10. doi:10.1007/s100380200075. PMID12376738.
Tukey RH, Strassburg CP (2001). "Genetic multiplicity of the human UDP-glucuronosyltransferases and regulation in the gastrointestinal tract.". Mol. Pharmacol.59 (3): 405–14. PMID11179432.
Strassburg CP, Kneip S, Topp J, et al. (2000). "Polymorphic gene regulation and interindividual variation of UDP-glucuronosyltransferase activity in human small intestine.". J. Biol. Chem.275 (46): 36164–71. doi:10.1074/jbc.M002180200. PMID10748067.
Heydel J, Leclerc S, Bernard P, et al. (2001). "Rat olfactory bulb and epithelium UDP-glucuronosyltransferase 2A1 (UGT2A1) expression: in situ mRNA localization and quantitative analysis.". Brain Res. Mol. Brain Res.90 (1): 83–92. doi:10.1016/S0169-328X(01)00080-8. PMID11376859.
Saito A, Kawamoto M, Kamatani N (2009). "Association study between single-nucleotide polymorphisms in 199 drug-related genes and commonly measured quantitative traits of 752 healthy Japanese subjects.". J. Hum. Genet.54 (6): 317–23. doi:10.1038/jhg.2009.31. PMID19343046.
Ross CJ, Katzov-Eckert H, Dubé MP, et al. (2009). "Genetic variants in TPMT and COMT are associated with hearing loss in children receiving cisplatin chemotherapy.". Nat. Genet.41 (12): 1345–9. doi:10.1038/ng.478. PMID19898482.