Fiche publication
Date publication
janvier 2015
Journal
The Journal of investigative dermatology
Auteurs
Membres identifiés du Cancéropôle Est :
Pr BENSUSSAN Armand
Tous les auteurs :
Ghazi B, Thonnart N, Bagot M, Bensussan A, Marie-Cardine A
Lien Pubmed
Résumé
We previously identified the NK cell receptor KIR3DL2 as a valuable diagnostic and prognostic marker for the detection of the tumoral T cell burden of Sézary syndrome (SS) patients. However, the function of this receptor on the malignant T lymphocyte population remained unexplored. We here demonstrate that engagement of KIR3DL2 by its recently identified ligand CpG oligodeoxynucleotide (ODN) induces the internalization of the receptor and leads to a caspase-dependent apoptosis of malignant T cells. This process of cellular death is correlated to a dephosphorylation of the transcription factor STAT3 (signal transducer and activator of transcription 3), which is found constitutively phosphorylated and activated in Sézary cells. Our results indicate that KIR3DL2 can directly promote SS malignant cell death through the use of CpG ODN.
Mots clés
Apoptosis, drug effects, CD4-Positive T-Lymphocytes, drug effects, Cells, Cultured, Humans, Ligands, Mycosis Fungoides, immunology, Oligodeoxyribonucleotides, immunology, Phosphorylation, drug effects, Receptors, KIR3DL2, immunology, STAT3 Transcription Factor, immunology, Sezary Syndrome, immunology, Signal Transduction, drug effects, Skin Neoplasms, immunology
Référence
J Invest Dermatol. 2015 01;135(1):229-237
