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Characterization of Thymic Settling Progenitors in the Mouse Embryo Using In Vivo and In Vitro Assays
Published on: June 9, 2015
Distribution patterns of stromal eosinophil cells in chick thymus during postnatal development
Hai-Bo Huang1, Yin-Xue Liu, Yong Hou
1Department of Anatomy, Histology and Embryology, College of Animal Science and Veterinary Medicine, Huazhong Agricultural University, Wuhan, Hubei 430070, China.
Veterinary Immunology and Immunopathology
|January 22, 2013
Summary
Eosinophils are present in chicken thymus and their numbers decrease with age. This suggests these thymic stromal cells play a role in early chicken thymus development.
Area of Science:
- Immunology
- Developmental Biology
- Avian Biology
Background:
- Eosinophils are thymic stromal cells involved in T-cell regulation in mammals.
- Limited research exists on eosinophils' role in chicken thymus development.
Purpose of the Study:
- To investigate the distribution of eosinophils in chicken thymus across different developmental stages.
- To understand the potential role of eosinophils in chicken thymic development.
Main Methods:
- Histological analysis using Lendrum's chromotrope 2R stain.
- Immunohistochemical analysis using an antibody against eosinophilic cationic protein (ECP).
- Examination of chicken thymi at days 1, 21, and 35 of development.
Main Results:
- Eosinophils are constitutively present in chick thymus, primarily in the corticomedullary junction and medulla.
- Eosinophils are concentrated around vessels and Hassall's corpuscles, with few in trabeculae and none in the cortex.
- The number of thymic eosinophils significantly decreases with increasing age (P<0.01).
Conclusions:
- Eosinophils are confirmed as thymic stromal cells in chickens.
- These findings suggest eosinophils may regulate chicken thymus development, particularly in early life stages.
