Premium
Expression of tryptophan hydroxylase in developing mouse taste papillae
Author(s) -
Ortíz-Alvarado Rafael,
Guzmán-Quevedo Omar,
Mercado-Camargo Rosalio,
Haertle Thomas,
Vignes Caroline,
Bolaños-Jiménez Francisco
Publication year - 2006
Publication title -
febs letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.593
H-Index - 257
eISSN - 1873-3468
pISSN - 0014-5793
DOI - 10.1016/j.febslet.2006.08.078
Subject(s) - taste , tph2 , tryptophan hydroxylase , lingual papilla , taste receptor , serotonin , microbiology and biotechnology , tryptophan , gene isoform , receptor , biology , chemistry , biochemistry , medicine , gene , amino acid , serotonergic
Gustatory papillae and associated taste buds receive and process chemical information from the environment. In mammals, their development takes place during the late phase of embryogenesis. However, the cellular factors that regulate the differentiation of taste papillae remain largely unknown. Here, we show by quantitative real time RT‐PCR that both isoforms of tryptophan hydroxylase (TPH1 and TPH2), the first and rate limiting enzyme of serotonin (5‐HT) synthesis, are expressed in developing circumvallate papillae. Immuno‐staining experiments further indicated that TPH is localized both in gustatory fibers and in differentiated taste receptor cells. These results point to the synthesis of 5‐HT in gustatory papillae, and allow one to hypothesize that the development of taste buds might be modulated by serotonin.