Expression of Eya1 in mouse taste buds

Taste substances are detected by taste receptor cells in the taste buds in the oral epithelium. Individual taste receptor cells contribute to evoking one of the five taste qualities: sweet, umami, bitter, sour, and salty (sodium). They are continuously replaced every few weeks by new ones generated...

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Bibliographic Details
Published in:Cell and tissue research 2021-03, Vol.383 (3), p.979-986
Main Authors: Ohmoto, Makoto, Kitamoto, Satsuki, Hirota, Junji
Format: Article
Language:English
Subjects:
Biomedical and Life Sciences
Biomedicine
Bitter taste
Cell differentiation
DNA binding proteins
Epithelium
Genetic transcription
Human Genetics
Hybridization
Molecular Medicine
Molecular modelling
Nucleotide sequence
Palate
Papillae
Proteomics
Regular Article
RNA
Salty taste
Sour taste
Stem cell transplantation
Stem cells
Sweet taste
Taste
Taste buds
Taste receptor neurons
Transcription factors
Umami
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Summary:Taste substances are detected by taste receptor cells in the taste buds in the oral epithelium. Individual taste receptor cells contribute to evoking one of the five taste qualities: sweet, umami, bitter, sour, and salty (sodium). They are continuously replaced every few weeks by new ones generated from local epithelial stem cells. A POU transcription factor, Pou2f3 (also known as Skn-1a), regulates the generation and differentiation of sweet, umami, and bitter cells. However, the molecular mechanisms underlying terminal differentiation into these Pou2f3-dependent taste receptor cells remain unknown. To identify the candidate molecules that regulate the differentiation of these taste receptor cells, we searched for taste receptor type-specific transcription factors using RNA-sequence data of sweet and bitter cells. No transcription factor gene showing higher expression in sweet cells than in bitter cells was found. Eyes absent 1 (Eya1) was identified as the only transcription factor gene showing higher expression in bitter cells than in sweet cells. In situ hybridization revealed that Eya1 was predominantly expressed in bitter cells and also in the putative immature/differentiating taste bud cells in circumvallate and fungiform papillae and soft palate. Eya1 is a candidate molecule that regulates the generation and differentiation of bitter cells.
ISSN:0302-766X
1432-0878
DOI:10.1007/s00441-020-03311-9