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[Ultrastructure of duodenal endocrine cells in children]
Insights
All endocrine cell types found in adults are present in the duodenal crypts of children aged 6-14. These cells show increased activity and polymorphism, indicating robust function during childhood development.
Area of Science:
- Gastroenterology
- Cell Biology
- Pediatric Pathology
Background:
- The epithelium of the duodenal crypts contains various endocrine cells crucial for digestive regulation.
- Previous studies have primarily focused on the ultrastructure of these cells in adults.
Purpose of the Study:
- To investigate the ultrastructural characteristics of endocrine cells in the duodenal crypts of children aged 6-14 years.
- To compare the findings in children with existing literature on adult endocrine cells.
Main Methods:
- Electron microscopy was used to examine the ultrastructure of duodenal crypt epithelium.
- Endocrine cells were identified and classified based on established criteria.
Main Results:
- All known ultrastructural varieties of endocrine cells, previously described in adults, were identified in the duodenal crypts of children.
- These cells formed distinct groups aligning with the International Classification.
- A higher degree of polymorphism was observed in children's endocrine cells, characterized by variations in secretory granule density within single cells.
- Degenerative forms of endocrine cells were also detected.
Conclusions:
- The presence of all adult endocrine cell types in children suggests their early development and establishment.
- The observed polymorphism and degenerative forms indicate active and dynamic functioning of the duodenal endocrine cell system in children.
- The findings support the adequate application of processing methods and allow for comparative analysis with adult data.
Abstract:
All ultrastructural varieties of endocrine cells, described in literature for adult persons, were revealed in the epithelium of the duodenal crypts of children at the age of 6--14 years. The cells form rather distinct groups in accordance with the International Classification, that speaks in favour of adequate application of the methods for processing the material and allows to compare the data obtained with those in literature. Endocrine cells in children, however, demonstrate greater polymorphism as their secretory granules differ in density even within a single cell. This phenomenon, along with detecting degenerative forms, demonstrates active functioning of this cell system in children.