File:Intraepithelial lymphocyte differentiation 03.jpg
Intraepithelial_lymphocyte_differentiation_03.jpg (600 × 484 pixels, file size: 68 KB, MIME type: image/jpeg)
Thymic and peripheral differentiation of natural and induced intraepithelial lymphocytes
- IELs - intraepithelial lymphocytes
- MLNs - mesenteric lymph nodes
- APC - antigen-presenting cell
In the thymus, immature CD4+CD8αβ+CD8αα+ (triple positive) thymocytes undergo agonist (‘alternative’) selection and differentiate into double-negative T cell receptor-αβ (TCRαβ)+ cells that are the precursors of natural TCRαβ+ intraepithelial lymphocytes (IELs). The TCRαβ+ natural IEL precursor cells partly acquire their antigen-experienced phenotype ‘naturally’ during selection with self antigens.
Precursor cells for TCRαβ+ and TCRγδ+ natural IELs upregulate intestinal homing receptors during their maturation in the thymus, which allows these cells to directly seed the intestinal epithelium after they leave the thymus. CD4+CD8αβ+ (double positive) thymocytes undergo ‘conventional’ thymic selection and differentiate into naive CD4+ and CD8αβ+ TCRαβ+ T cells that migrate to the periphery.
These naive T cells can differentiate into effector T cells in response to peripheral antigens and subsequently migrate to the gut and become incorporated into the induced IEL compartment.
- Immune Images: Oesophagus MALT | Colon MALT | Peyer's patch overview | Peyer's patch detail | Cartoon - IEL development | Cartoon - IEL function | Cartoon - IEL differentiation | Mesenteric Lymph Nodes overview | Palatine Tonsil | Tonsil | Immune System Development
Reference
<pubmed>21681197</pubmed>| Nat Rev Immunol.
Copyright
© 2011 Macmillan Publishers Limited. All rights reserved
Licensee: Mark A Hill License Date: Jan 25, 2015 License Number: 3556220285761 Publication: Nature Reviews Immunology Title: The light and dark sides of intestinal intraepithelial lymphocytes Type Of Use: post on a website Figure 1. Nihms307956-23.jpg
Cite this page: Hill, M.A. (2026, October 1) Embryology Intraepithelial lymphocyte differentiation 03.jpg. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/File:Intraepithelial_lymphocyte_differentiation_03.jpg
- © Dr Mark Hill 2026, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G
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| Gwalagizhi | Nyangagi | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 14:50, 26 Ocak 2015 | | 600 × 484 (68 KB) | Z8600021 (talk | contribs) | ==Thymic and peripheral differentiation of natural and induced intraepithelial lymphocytes== * IELs - intraepithelial lymphocytes * MLNs - mesenteric lymph nodes * APC - antigen-presenting cell In the thymus, immature CD4+CD8αβ+CD8αα+ (triple pos... |
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