Expression of tryptophan hydroxylase in developing mouse taste papillae
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- 作者：Rafael Ortí ; z-Alvarado ; Omar Guzmá ; n-Quevedo ; Rosalio Mercado-Camargo ; Thomas Haertle ; Caroline Vignes and Francisco Bolañ ; os-Jimé ; nez
- 关键词：Serotonin ; Taste buds ; Gustatory papillae ; Mice ; Development
- 刊名：FEBS Letters
- 出版年：2006
- 出版时间：2 October 2006
- 年：2006
- 卷：580
- 期：22
- 页码：5371-5376
- 全文大小：348 K
文摘
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.