Human BDCA2+CD123+CD56+ dendritic cells (DCs) related to blastic plasmacytoid dendritic cell neoplasm represent a unique myeloid DC subset
Protein & Cell
; (12): 297-306, 2015.
Article
de En
| WPRIM
| ID: wpr-757590
Bibliothèque responsable:
WPRO
ABSTRACT
Dendritic cells (DCs) comprise two functionally distinct subsets: plasmacytoid DCs (pDCs) and myeloid DCs (mDCs). pDCs are specialized in rapid and massive secretion of type I interferon (IFN-I) in response to nucleic acids through Toll like receptor (TLR)-7 or TLR-9. In this report, we characterized a CD56(+) DC population that express typical pDC markers including CD123 and BDCA2 but produce much less IFN-I comparing with pDCs. In addition, CD56(+) DCs cluster together with mDCs but not pDCs by genome-wide transcriptional profiling. Accordingly, CD56(+) DCs functionally resemble mDCs by producing IL-12 upon TLR4 stimulation and priming naïve T cells without prior activation. These data suggest that the CD56(+) DCs represent a novel mDC subset mixed with some pDC features. A CD4(+)CD56(+) hematological malignancy was classified as blastic plasmacytoid dendritic cell neoplasm (BPDCN) due to its expression of characteristic molecules of pDCs. However, we demonstrated that BPDCN is closer to CD56(+) DCs than pDCs by global gene-expression profiling. Thus, we propose that the CD4(+)CD56(+) neoplasm may be a tumor counterpart of CD56(+) mDCs but not pDCs.
Texte intégral:
1
Indice:
WPRIM
Sujet Principal:
Anatomopathologie
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Cellules dendritiques
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Glycoprotéines membranaires
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Récepteurs immunologiques
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Marqueurs biologiques
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Interféron de type I
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Expression des gènes
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Immunophénotypage
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Interleukine-12
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Lignage cellulaire
Limites du sujet:
Humans
langue:
En
Texte intégral:
Protein & Cell
Année:
2015
Type:
Article