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Origin and differentiation of gut endocrine cells
1Department of Anatomy and Cell Biology, Medical School, University of Cape Town, Observatory, South Africa.
Histology and Histopathology
|July 1, 1993
Summary
Gut endocrine cells, crucial for digestion, originate from the endodermal stem cell pool, not neural crest cells. Their development involves regional patterning and mesenchymal signals, culminating in mature cell types.
Area of Science:
- Gastroenterology
- Developmental Biology
- Cell Biology
Background:
- Digestive tract epithelium contains endocrine cells producing serotonin and regulatory peptides.
- Gut endocrine cells are confirmed to be of endodermal origin, sharing the stem cell pool with other gut epithelial cells.
- Previous theories of neural crest or neurectodermal origin have been refuted.
Purpose of the Study:
- To propose a working hypothesis for the differentiation of gut endocrine cells.
- To elucidate the developmental origins and differentiation pathways of gut endocrine cells.
Main Methods:
- Review and synthesis of existing evidence on gut endocrine cell differentiation.
- Development of a hypothesis based on current scientific understanding.
Main Results:
- The developing gut initially shows a tendency towards intestinal differentiation, with endoderm possessing the potential for diverse endocrine cell types.
- Regional patterning influences morphogenesis and the selection of endocrine cell types and proportions.
- Mesenchyme provides signals to reinforce the regional pattern, and circulating factors like glucocorticoids mediate maturation.
Conclusions:
- Gut endocrine cell differentiation is a multi-stage process involving endodermal potential, regional patterning, mesenchymal signaling, and hormonal maturation.
- Further research is needed to investigate other potential factors like growth factors and extracellular matrix components.