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Efficient Isolation Protocol for B and T Lymphocytes from Human Palatine Tonsils
Published on: November 16, 2015
Formation of the tonsillar corpuscle
1Division of Anatomy and Cell Biology, UMDS, Guy's Hospital, University of London, U.K.
Insights
Human palatine tonsils contain structures resembling thymic Hassall's corpuscles. These form from degenerating epithelial cells within microcrypts during immune responses, similar to thymus development.
Area of Science:
- Immunology
- Histology
- Human Anatomy
Background:
- The human palatine tonsil contains unique epithelial structures.
- These structures bear resemblance to thymic Hassall's corpuscles.
Purpose of the Study:
- To investigate the origin and nature of tonsillar epithelial structures.
- To compare these structures with thymic Hassall's corpuscles.
Main Methods:
- Histological examination of human palatine tonsil tissue.
- Analysis of epithelial cell morphology and arrangement.
Main Results:
- Identified epithelial structures near tonsillar crypts.
- These structures exhibit features similar to Hassall's corpuscles.
- Proposed formation mechanism involves microcrypt occlusion and epithelial cell degeneration.
Conclusions:
- Tonsillar corpuscles arise from degenerating epithelial cells within occluded microcrypts during antigenic stimulation.
- Structural similarities to Hassall's corpuscles are attributed to shared endodermal origin and lymphoepithelial organ properties.
Abstract:
In this study of the human palatine tonsil we examined epithelial structures found always in the vicinity of the crypts and closely resembling thymic Hassall's corpuscles. We propose that in the reactive tonsillar lymphoid tissue these corpuscles form as a result of occlusion of fine microcrypts by the expanding lymphoid follicles during antigenic stimulation. The reticulated epithelial cells lining these microcrypts may then loose their polarisation, and gradually degenerate deep in the parenchyma, forming concentrically arranged parakeratotic pearls, rather than desquamate at the free epithelial surface. The structural similarities of the tonsillar and Hassall's corpuscles may be explained by endodermal embryological origin of the primordia of both organs, and by the specific degenerative properties of epithelia in the lymphoepithelial immune organs.
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