Difference between revisions of "File:Spleen structure 01.jpg"

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==Spleen Structure and Cell Distribution==
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{|
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| valign="top"|Schematic representation of the organization of the spleen (left panel).
  
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* The white pulp consists of T cell (lymphocyte) zones (also known as the periarteriolar lymphoid sheath (PALS)) containing networks of fibroblastic reticular cells (FRC) surrounding a central arteriole, together with B cell follicles containing a central network of follicular dendritic cells (FDC).
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* Marginal zones (MZ) surrounding the white pulp contain marginal reticular cells (MRC), particularly at the edges of the B cell follicles.
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* Blood and leukocytes entering the spleen pass through branches of the central arteriole, which end in the marginal sinuses and red pulp.
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* In the cords of the red pulp, a dense network of reticular fibroblasts and fibres construct an open blood network, which is marked by its lack of a typical endothelial cell lining.
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* Large numbers of macrophages phagocytose dying or damaged red blood cells in the red pulp (not shown).
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* Immune cells enter the white pulp at regions where the T cell zones abut the MZ, known as the MZ bridging channels.
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| valign="top"|An image of a section of mouse spleen generated using multicolour immunofluoresence microscopy illustrates the organization of the white pulp, red pulp, and MZ (centre panel).
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* The distribution of cells:
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** '''T cells''' - (white) CD3+
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** '''B cells''' - (blue) B220+
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** '''macrophages''' - (cyan) CD169+ MZ
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** '''dendritic cells''' - (green) (DCs) CD11c+
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** '''stromal cells''' - (red) ER-TR7+
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* The distinct organization of stromal cells in different regions of the spleen is shown by single-colour immunofluoresence staining (right panel).
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* Networks of stromal cells and reticular fibres form in the white pulp, including the fibroblastic reticular cells (FRCs) in T cell zones, follicular dendritic cells (FDCs) in B cell follicles (ER-TR7−) and marginal reticular cells (MRCs) in the MZ.
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* A dense network of stromal cells and reticular fibres is present in the red pulp.
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Scale bars represent 130 μM.
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|}
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{{Spleen Histology}}
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===Reference===
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{{#pmid:19644499}}
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====Copyright====
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[http://www.microbiol.unimelb.edu.au/research/immunology/s_mueller.html Mueller]
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[[File_talk:Spleen_structure_01.jpg|Permissions]]
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{{Footer}}
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[[Category:Spleen]]

Latest revision as of 11:03, 19 July 2019

Spleen Structure and Cell Distribution

Schematic representation of the organization of the spleen (left panel).
  • The white pulp consists of T cell (lymphocyte) zones (also known as the periarteriolar lymphoid sheath (PALS)) containing networks of fibroblastic reticular cells (FRC) surrounding a central arteriole, together with B cell follicles containing a central network of follicular dendritic cells (FDC).
  • Marginal zones (MZ) surrounding the white pulp contain marginal reticular cells (MRC), particularly at the edges of the B cell follicles.
  • Blood and leukocytes entering the spleen pass through branches of the central arteriole, which end in the marginal sinuses and red pulp.
  • In the cords of the red pulp, a dense network of reticular fibroblasts and fibres construct an open blood network, which is marked by its lack of a typical endothelial cell lining.
  • Large numbers of macrophages phagocytose dying or damaged red blood cells in the red pulp (not shown).
  • Immune cells enter the white pulp at regions where the T cell zones abut the MZ, known as the MZ bridging channels.
An image of a section of mouse spleen generated using multicolour immunofluoresence microscopy illustrates the organization of the white pulp, red pulp, and MZ (centre panel).
  • The distribution of cells:
    • T cells - (white) CD3+
    • B cells - (blue) B220+
    • macrophages - (cyan) CD169+ MZ
    • dendritic cells - (green) (DCs) CD11c+
    • stromal cells - (red) ER-TR7+
  • The distinct organization of stromal cells in different regions of the spleen is shown by single-colour immunofluoresence staining (right panel).
  • Networks of stromal cells and reticular fibres form in the white pulp, including the fibroblastic reticular cells (FRCs) in T cell zones, follicular dendritic cells (FDCs) in B cell follicles (ER-TR7−) and marginal reticular cells (MRCs) in the MZ.
  • A dense network of stromal cells and reticular fibres is present in the red pulp.

Scale bars represent 130 μM.


Spleen Development: SH Lecture Spleen | SH Adult Histology | Overview Red and White Pulp | Overview Red and White Pulp | Cords and Sinuses | Reticular Fibre overview | Reticular Fibre detail | unlabeled red and white pulp | unlabeled red pulp and macrophages | unlabeled white pulp germinal centre | unlabeled reticular fibre | unlabeled white pulp reticular | unlabeled red pulp reticular | Structure cartoon | Cartoon and stain | Category:Spleen | Histology Stains | Immune System Development


Reference

Mueller SN & Germain RN. (2009). Stromal cell contributions to the homeostasis and functionality of the immune system. Nat. Rev. Immunol. , 9, 618-29. PMID: 19644499 DOI.

Copyright

Mueller

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Cite this page: Hill, M.A. (2021, November 27) Embryology Spleen structure 01.jpg. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/File:Spleen_structure_01.jpg

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© Dr Mark Hill 2021, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G

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