Functional analysis of human olfactory receptors with a high basal activity using LNCaP cell line

Humans use a family of more than 400 olfactory receptors (ORs) to detect odorants. However, deorphanization of ORs is a critical issue because the functional properties of more than 80% of ORs remain unknown, thus, hampering our understanding of the relationship between receptor function and percept...

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Bibliographic Details
Published in:PloS one 2022-04, Vol.17 (4), p.e0267356-e0267356
Main Authors: Ieki, Takashi, Yamanaka, Yuki, Yoshikawa, Keiichi
Format: Article
Language:English
Subjects:
Amino acids
Analysis
Biology and Life Sciences
Functional analysis
Genes
Genetic engineering
HEK293 Cells
Humans
Ligands
Male
Odorant receptors
Odorants
Olfactory Receptor Neurons - metabolism
Physical Sciences
Plasmids
Prostate cancer
Prostate carcinoma
Proteins
Reagents
Receptors
Receptors, Odorant - genetics
Receptors, Odorant - metabolism
Research and Analysis Methods
Signal transduction
Smell
Social Sciences
Tumor cell lines
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Summary:Humans use a family of more than 400 olfactory receptors (ORs) to detect odorants. However, deorphanization of ORs is a critical issue because the functional properties of more than 80% of ORs remain unknown, thus, hampering our understanding of the relationship between receptor function and perception. HEK293 cells are the most commonly used heterologous expression system to determine the function of a given OR; however, they cannot functionally express a majority of ORs probably due to a lack of factor(s) required in cells in which ORs function endogenously. Interestingly, ORs have been known to be expressed in a variety of cells outside the nose and play critical physiological roles. These findings prompted us to test the capacity of cells to functionally express a specific repertoire of ORs. In this study, we selected three cell lines that endogenously express functional ORs. We demonstrated that human prostate carcinoma (LNCaP) cell lines successfully identified novel ligands for ORs that were not recognized when expressed in HEK293 cells. Further experiments suggested that the LNCaP cell line was effective for functional expression of ORs, especially with a high basal activity, which impeded the sensitive detection of ligand-mediated activity of ORs. This report provides an efficient functional assay system for a specific repertoire of ORs that cannot be characterized in current cell systems.
ISSN:1932-6203
1932-6203
DOI:10.1371/journal.pone.0267356