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Principal component analysis uncovers cytomegalovirus-associated NK cell activation in Ph+ leukemia patients treated with dasatinib.

Abstract：

:Dasatinib treatment markedly increases the number of large granular lymphocytes (LGLs) in a proportion of Ph+ leukemia patients, which associates with a better prognosis. The lymphocytosis is predominantly observed in cytomegalovirus (CMV)-seropositive patients, yet detectable CMV reactivation exists only in a small fraction of patients. Thus, etiology of the lymphocytosis still remains unclear. Here, we identified NK cells as the dominant LGLs expanding in dasatinib-treated patients, and applied principal component analysis (PCA) to an extensive panel of NK cell markers to explore underlying factors in NK cell activation. PCA displayed phenotypic divergence of NK cells that reflects CMV-associated differentiation and genetic differences, and the divergence was markedly augmented in CMV-seropositive dasatinib-treated patients. Notably, the CMV-associated highly differentiated status of NK cells was already observed at leukemia diagnosis, and was further enhanced after starting dasatinib in virtually all CMV-seropositive patients. Thus, the extensive characterization of NK cells by PCA strongly suggests that CMV is an essential factor in the NK cell activation, which progresses stepwise during leukemia and subsequent dasatinib treatment most likely by subclinical CMV reactivation. This study provides a rationale for the exploitation of CMV-associated NK cell activation for treatment of leukemias.

journal_name

Leukemia

journal_title

Leukemia

authors

Ishiyama K,Kitawaki T,Sugimoto N,Sozu T,Anzai N,Okada M,Nohgawa M,Hatanaka K,Arima N,Ishikawa T,Tabata S,Onaka T,Oka S,Nakabo Y,Amakawa R,Matsui M,Moriguchi T,Takaori-Kondo A,Kadowaki N

doi

10.1038/leu.2016.174

subject

Has Abstract

pub_date

2017-01-01 00:00:00

pages

203-212

issue

1

eissn

0887-6924

issn

1476-5551

pii

leu2016174

journal_volume

31

pub_type

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