Abstract:
:Natural killer cells (NK) are pivotal cells of innate immunity. They are potent antileukemic cytotoxic effectors. A defect in their cytotoxicity has been described in some hematopoietic malignancies such as acute myeloid leukemia, multiple myeloma and myelodysplastic syndromes. This defect is at least partially linked to a decreased or absent expression of some activating NK cells molecules, more particularly the so-called natural cytotoxicity receptors. In the present study, we more particularly focused our attention on NK cells of polycythemia vera, a myeloproliferative disease characterized by the presence of mutated JAK2 tyrosine kinase. The polymerase chain reaction analysis of NK cells from patients showed that they expressed the mutated form of JAK2. In polycythemia vera the proportion of NK was increased compared to healthy donors. The proliferative and cytotoxic abilities of NK cells from patients were similar to healthy donors. Expression of activating or inhibitory receptors was comparable in patients and donors, with nonetheless an imbalance for the inhibitory form of the CD158a,h couple of receptors in patients. Finally, the transcriptomic profile analysis clearly identified a discriminant signature between NK cells from patients and donors that could putatively be the consequence of abnormal continuous activation of mutated JAK2.
journal_name
Hum Immunoljournal_title
Human immunologyauthors
Sanchez C,Baier C,Colle JG,Chelbi R,Rihet P,Le Treut T,Imbert J,Sébahoun G,Venton G,Costello RTdoi
10.1016/j.humimm.2015.09.010subject
Has Abstractpub_date
2015-09-01 00:00:00pages
644-50issue
9eissn
0198-8859issn
1879-1166pii
S0198-8859(15)00447-4journal_volume
76pub_type
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