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- Hassalls_corpuscles abstract "Hassall's corpuscles (or thymic corpuscles (bodies)) are structures found in the medulla of the human thymus, formed from eosinophilic type VI epithelial reticular cells arranged concentrically. These concentric corpuscles are composed of a central mass, consisting of one or more granular cells, and of a capsule formed of epithelioid cells. They vary in size with diameters from 20 to more than 100μm, and tend to grow larger with age.They can be spherical or ovoid and their epithelial cells contain keratohyalin and bundles of cytoplasmic fibres.Later studies indicate that Hassall's corpuscles differentiate from medullary thymic epithelial cells after they lose autoimmune regulator (AIRE) expression. They are named for Arthur Hill Hassall, who discovered them in 1846.The function of Hassall's corpuscles is currently unclear, and the absence of this structure in the murine thymus has restricted mechanistic dissection. It is known that Hassall's corpuscles are a potent source of the cytokine TSLP. In vitro, TSLP directs the maturation of dendritic cells, and increases the ability of dendritic cells to convert naive thymocytes to a Foxp3+ regulatory T cell lineage. It is unknown if this is the physiological function of Hassall's corpuscles in vivo.Research into the systemic organization of Hassall’s corpuscles in the thymus of first-year children has determined that the corpuscles' main cells are two types of cells that differ from each other in origin, texture, function, immunohistochemical and ultrastructural features. The composition and number of accessory cells in Hassall’s corpuscles depends on their stage of development. The main systemic factor of corpuscle organization is the process of synthesis, mobilization, and transduction of tissue-specific autoantigens for immune tolerance induction.In the past decade, researchers found tissue-specific self-antigens in Hassall's corpuscles and revealed their role in the pathogenesis of diseases such as type 1 diabetes, rheumatoid arthritis, multiple sclerosis, autoimmune thyroiditis, Goodpasture's syndrome, and others. They also discovered that Hassall's corpuscles synthesize chemokines affecting different cell populations in thymic medulla. Despite this, the information on the relationship between Hassall's corpuscles with other cell types of thymic medulla (dendritic, myoid, neuroendocrine cells, thymocytes, macrophages, eosinophils, etc.) remains insufficient and often contradictory. Mechanisms of these relationships and their functional significance are still unclear. The lack of such data does not allow a systemic view of the differentiation processes in the thymus.".
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- Hassalls_corpuscles thumbnail Thymic_corpuscle.jpg?width=300.
- Hassalls_corpuscles wikiPageID "7645862".
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- Hassalls_corpuscles wikiPageRevisionID "664548385".
- Hassalls_corpuscles wikiPageWikiLink Arthur_Hill_Hassall.
- Hassalls_corpuscles wikiPageWikiLink Autoimmune_regulator.
- Hassalls_corpuscles wikiPageWikiLink Autoimmune_thyroiditis.
- Hassalls_corpuscles wikiPageWikiLink Category:Histology.
- Hassalls_corpuscles wikiPageWikiLink Cytokine.
- Hassalls_corpuscles wikiPageWikiLink Cytoplasm.
- Hassalls_corpuscles wikiPageWikiLink Dendritic_cell.
- Hassalls_corpuscles wikiPageWikiLink Dendritic_cells.
- Hassalls_corpuscles wikiPageWikiLink Eosinophilic.
- Hassalls_corpuscles wikiPageWikiLink Epithelial_reticular_cell.
- Hassalls_corpuscles wikiPageWikiLink Goodpasture_syndrome.
- Hassalls_corpuscles wikiPageWikiLink Goodpastures_syndrome.
- Hassalls_corpuscles wikiPageWikiLink H&E_stain.
- Hassalls_corpuscles wikiPageWikiLink Keratohyalin.
- Hassalls_corpuscles wikiPageWikiLink Micrograph.
- Hassalls_corpuscles wikiPageWikiLink Multiple_sclerosis.
- Hassalls_corpuscles wikiPageWikiLink Murinae.
- Hassalls_corpuscles wikiPageWikiLink Murine.
- Hassalls_corpuscles wikiPageWikiLink Rheumatoid_arthritis.
- Hassalls_corpuscles wikiPageWikiLink TSLP.
- Hassalls_corpuscles wikiPageWikiLink Thymic_stromal_lymphopoietin.
- Hassalls_corpuscles wikiPageWikiLink Thymus.
- Hassalls_corpuscles wikiPageWikiLinkText "Hassall's corpuscles".
- Hassalls_corpuscles caption "Micrograph of a thymic corpuscle. H&E stain.".
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- Hassalls_corpuscles name "Hassall's corpuscles".
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- Hassalls_corpuscles subject Category:Histology.
- Hassalls_corpuscles hypernym Structures.
- Hassalls_corpuscles type AnatomicalStructure.
- Hassalls_corpuscles type Building.
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- Hassalls_corpuscles type Q4936952.
- Hassalls_corpuscles comment "Hassall's corpuscles (or thymic corpuscles (bodies)) are structures found in the medulla of the human thymus, formed from eosinophilic type VI epithelial reticular cells arranged concentrically. These concentric corpuscles are composed of a central mass, consisting of one or more granular cells, and of a capsule formed of epithelioid cells.".
- Hassalls_corpuscles label "Hassall's corpuscles".
- Hassalls_corpuscles sameAs Hassall-Körperchen.
- Hassalls_corpuscles sameAs Hassalli_kehad.
- Hassalls_corpuscles sameAs Corpuscule_de_Hassal.
- Hassalls_corpuscles sameAs גופיפי_הסל.
- Hassalls_corpuscles sameAs Corpuscoli_di_Hassall.
- Hassalls_corpuscles sameAs 胸腺小体.
- Hassalls_corpuscles sameAs Ciałka_Hassala.
- Hassalls_corpuscles sameAs Corpúsculos_de_Hassall.
- Hassalls_corpuscles sameAs m.01xpjbv.
- Hassalls_corpuscles sameAs Тельца_Гассаля.
- Hassalls_corpuscles sameAs Q767287.
- Hassalls_corpuscles sameAs Q767287.
- Hassalls_corpuscles wasDerivedFrom Hassalls_corpusclesoldid=664548385.
- Hassalls_corpuscles depiction Thymic_corpuscle.jpg.
- Hassalls_corpuscles isPrimaryTopicOf Hassalls_corpuscles.
- Hassalls_corpuscles name "Hassall's corpuscles".