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- Title
Identification of enteroendocrine cells that express TRPA1 channels in the mouse intestine.
- Authors
Cho, Hyun-Jung; Callaghan, Brid; Bron, Romke; Bravo, David; Furness, John
- Abstract
TRPA1 is an ion channel that detects specific chemicals in food and also transduces mechanical, cold and chemical stimulation. Its presence in sensory nerve endings is well known and recent evidence indicates that it is expressed by some gastrointestinal enteroendocrine cells (EEC). The purpose of the present work is to identify and quantify EEC that express TRPA1 in the mouse gastrointestinal tract. Combined in situ hybridisation histochemistry for TRPA1 and immunofluorescence for EEC hormones was used. TRPA1 expressing EEC were common in the duodenum and jejunum, were rare in the distal small intestine and were absent from the stomach and large intestine. In the duodenum and jejunum, TRPA1 occurred in EEC that contained both cholecystokinin (CCK) and 5-hydroxytryptamine (5HT) and in a small number of cells expressing 5HT but not CCK. TRPA1 was absent from CCK cells that did not express 5HT and from EEC containing glucagon-like insulinotropic peptide. Thus TRPA1 is contained in very specific EEC populations. It is suggested that foods such as garlic and cinnamon that contain TRPA1 stimulants may aid digestion by facilitating the release of CCK.
- Subjects
SENSORY receptors; ION channels; GASTROINTESTINAL system; LABORATORY mice; IMMUNOFLUORESCENCE; LARGE intestine; CELL populations; PHYSIOLOGY
- Publication
Cell & Tissue Research, 2014, Vol 356, Issue 1, p77
- ISSN
0302-766X
- Publication type
Article
- DOI
10.1007/s00441-013-1780-x