Abstract
In the gastrointestinal (GI) tract, a variety of digestive processes are continually adapted to the changing composition of ingested foods, which requires a precise chemosensory monitoring of luminal contents. Gustducin-expressing brush cells scattered throughout the GI mucosa are considered candidate sensory cells for accomplishing this task. In this study, we have investigated a large cluster of gustducin-positive cells which is located exactly at the boundary between the fundic and the oxyntic mucosa of the mouse stomach, at the so-called “limiting ridge”. In close association with the candidate chemosensory cluster, we found two populations of enteroendocrine cells: one population containing the satiety regulating hormone ghrelin, the other population comprising serotonin-secreting enterochromaffin cells. The particular arrangement of gustducin-expressing cells and enteroendocrine cells at the limiting ridge suggests a direct interplay between these cell types with immediate implications, not only for digestive processes in the stomach, but also for parameters controlling the satiety status.
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Abbreviations
- CV:
-
Circumvallate papilla
- EC cells:
-
Enterochromaffin cells
- ECL cells:
-
Enterochromaffin-like cells
- GI:
-
Gastrointestinal
- GLP-1:
-
Glucagon-like peptide-1
- 5-HT:
-
5-Hydroxytryptamin
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Acknowledgments
We thank Kerstin Bach for excellent technical assistance. This work was supported by the Schwerpunktprogramm Baden-Württemberg.
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Hass, N., Schwarzenbacher, K. & Breer, H. A cluster of gustducin-expressing cells in the mouse stomach associated with two distinct populations of enteroendocrine cells. Histochem Cell Biol 128, 457–471 (2007). https://doi.org/10.1007/s00418-007-0325-3
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DOI: https://doi.org/10.1007/s00418-007-0325-3