CD23

Source: Wikipedia, the free encyclopedia.
FCER2
Gene ontology
Molecular function
Cellular component
Biological process
Sources:Amigo / QuickGO
Ensembl
UniProt
RefSeq (mRNA)

NM_001207019
NM_001220500
NM_002002

RefSeq (protein)

NP_001193948
NP_001207429
NP_001993

Location (UCSC)Chr 19: 7.69 – 7.7 MbChr 8: 3.73 – 3.74 Mb
PubMed search[3][4]
Wikidata
View/Edit HumanView/Edit Mouse

CD23, also known as Fc epsilon RII, or FcεRII, is the "low-affinity"

platelets
.

There are two forms of CD23: CD23a and CD23b. CD23a is present on follicular B cells, whereas CD23b requires

Langerhans cells, eosinophils, and macrophages.[5]

Function

CD23 is known to have a role of transportation in antibody feedback regulation. Antigens which enter the blood stream can be captured by antigen specific IgE antibodies. The IgE immune complexes that are formed bind to CD23 molecules on B cells, and are transported to the B cell follicles of the spleen. The antigen is then transferred from CD23+ B cells to CD11c+ antigen presenting cells. The CD11c+ cells in turn present the antigen to CD4+ T cells, which can lead to an enhanced antibody response.[6]

Clinical significance

The allergen responsible in dust mite allergyDer p 1—is known to cleave CD23 from a cell’s surface. As CD23 is soluble, it can move freely and interact with cells in plasma. Recent studies have shown that increased levels of soluble CD23 cause the recruitment of non-sensitised B-cells in the presentation of antigen peptides to allergen-specific B-cells, therefore increasing the production of allergen specific IgE. IgE, in turn, is known to upregulate the cellular expression of CD23 and Fc epsilon RI (high-affinity IgE receptor).[7]

CD21) expression by the follicular dendritic cells in follicular lymphoma.[8]

In

B-cell chronic lymphomocytic leukaemias are positive, allowing immunohistochemistry to distinguish these conditions, which otherwise have a similar appearance. Reed – Sternberg cells are usually positive for CD23.[10]

See also

References

  1. ^ a b c GRCh38: Ensembl release 89: ENSG00000104921Ensembl, May 2017
  2. ^ a b c GRCm38: Ensembl release 89: ENSMUSG00000005540Ensembl, May 2017
  3. ^ "Human PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
  4. ^ "Mouse PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
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  8. PMID 31269981.
    - This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/
    )
  9. .
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Further reading

External links

  • Human FCER2 genome location and FCER2 gene details page in the UCSC Genome Browser.
  • PDBe-KB provides an overview of all the structure information available in the PDB for Human Low affinity immunoglobulin epsilon Fc receptor


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