Natural killer cells in patients with polycythemia vera.

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 Immunol

journal_title

Human immunology

authors

Sanchez C,Baier C,Colle JG,Chelbi R,Rihet P,Le Treut T,Imbert J,Sébahoun G,Venton G,Costello RT

doi

10.1016/j.humimm.2015.09.010

subject

Has Abstract

pub_date

2015-09-01 00:00:00

pages

644-50

issue

9

eissn

0198-8859

issn

1879-1166

pii

S0198-8859(15)00447-4

journal_volume

76

pub_type

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