Journal
PLOS ONE
Volume 16, Issue 3, Pages -Publisher
PUBLIC LIBRARY SCIENCE
DOI: 10.1371/journal.pone.0249029
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Funding
- Agence Nationale de la Recherche [ANR-18-CE92-0018-01]
- [ANR-16-CE21-0004-01]
- Agence Nationale de la Recherche (ANR) [ANR-18-CE92-0018] Funding Source: Agence Nationale de la Recherche (ANR)
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This study focused on a major olfactory UDP-glucuronosyltransferase (UGT): UGT2A1, and identified its expression in the olfactory sensory neurons using immunohistochemistry and immunogold electronic microscopy. The results supported the role of olfactory UGTs in the vertebrate olfactory perireceptor process.
Odorant metabolizing enzymes (OMEs) are expressed in the olfactory epithelium (OE) where they play a significant role in the peripheral olfactory process by catalyzing the fast biotransformation of odorants leading either to their elimination or to the synthesis of new odorant stimuli. The large family of OMEs gathers different classes which interact with a myriad of odorants alike and complementary to olfactory receptors. Thus, it is necessary to increase our knowledge on OMEs to better understand their function in the physiological process of olfaction. This study focused on a major olfactory UDP-glucuronosyltransferase (UGT): UGT2A1. Immunohistochemistry and immunogold electronic microscopy allowed to localize its expression in the apical part of the sustentacular cells and originally at the plasma membrane of the olfactory cilia of the olfactory sensory neurons, both locations in close vicinity with olfactory receptors. Moreover, using electroolfactogram, we showed that a treatment of the OE with beta-glucuronidase, an enzyme which counterbalance the UGTs activity, increased the response to eugenol which is a strong odorant UGT substrate. Altogether, the results supported the function of the olfactory UGTs in the vertebrate olfactory perireceptor process.
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