CD146

Source: Wikipedia, the free encyclopedia.
MCAM
Identifiers
Ensembl
UniProt
RefSeq (mRNA)

NM_006500

NM_023061
NM_001359530

RefSeq (protein)

NP_006491

NP_075548
NP_001346459

Location (UCSC)Chr 11: 119.31 – 119.32 MbChr 9: 44.05 – 44.05 Mb
PubMed search[3][4]
Wikidata
View/Edit HumanView/Edit Mouse

CD146 (cluster of differentiation 146) also known as the melanoma cell adhesion molecule (MCAM) or cell surface glycoprotein MUC18, is a 113kDa cell adhesion molecule currently used as a marker for endothelial cell lineage. In humans, the CD146 protein is encoded by the MCAM gene.[5]

Function

MCAM functions as a receptor for laminin alpha 4,

mesenchymal stem cells, and strongly expressed on blood vessel endothelium
and smooth muscle.

Two isoforms exist (MCAM long (MCAM-1), and MCAM short, or MCAM-s) which differ in the length of their cytoplasmic domain. Activation of these isoforms seems to produce functional differences as well. Natural killer cells transfected with MCAM-1 demonstrate decreased rolling velocity and increased cell adhesion to an endothelial cell monolayer and increased microvilli formation while cells transfected with MCAM-s showed no change in adhesion characteristics. Since these characteristics are important in leukocyte extravasation, MCAM-1 may be an important part of the inflammatory response.

CD146 has been demonstrated to appear on a small subset of T and B lymphocytes in the peripheral blood of healthy individuals. The CD146+ T cells display an immunophenotype consistent with effector memory cells and have a distinct gene profile from the CD146- T cells.[7][8] CD146 T cells have been shown by Dagur and colleagues to produce IL-17.[9]

CD146 has been seen as a marker for mesenchymal stem cells isolated from multiple adult and fetal organs,[10] and its expression may be linked to multipotency; mesenchymal stem cells with greater differentiation potential express higher levels of CD146 on the cell surface.[11]

Relevance in cancer

MCAM inhibits breast cancer progression.[12]

Normal

E-cadherin expression on the surface of melanoma cells. Melanoma cells with functional E-cadherin on the surface can only exclusively grow in the epidermis as keratinocytes frequently downregulate the expression of MCAM on melanoma cells.[13]

References

  1. ^ a b c GRCh38: Ensembl release 89: ENSG00000076706Ensembl, May 2017
  2. ^ a b c GRCm38: Ensembl release 89: ENSMUSG00000032135Ensembl, 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.
  5. S2CID 37508075
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Further reading

External links

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