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. 2021 Apr 27;12:665541. doi: 10.3389/fimmu.2021.665541

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Copyright © 2021 Cianga, Campos Catafal, Cianga, Pavel Tanasa, Cherry, Collet, Tavernier, Guyotat, Rusu and Aanei

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Comparison of the mean percentages of NK subsets expressing CD159a and KIR receptors within the bone marrow microenvironment of NBM, MDS, and AML cases. (A–D) Left panel: CD56^bright CD94^hi CD16^- CD57^- immature NK subset; middle panel: CD56^dim CD94^med CD16⁺ CD57^- mature NK subset; right panel: CD56^dim CD94^low CD16⁺ CD57⁺ hypermature NK subset; (A) Percentage of bone marrow CD159a-positive NK subsets in normal bone marrow (NBM, n = 30), myelodysplastic syndromes (MDS, n = 25), and acute myeloid leukemias (AML, n = 8) cases. Bars represent the mean ± SEM (*P < 0.05, ns, not significant; one-way ANOVA test followed by Tukey’s Multiple Comparison test; only for comparing immature NK subsets of NBM vs. MDS: Mann Whitney test). (B) Percentage of bone marrow CD158a-positive NK subsets in NBM (n = 30), MDS (n = 24), and AML (n = 8) cases. Bars represent the mean ± SEM (*P < 0.05, ns, not significant; one-tailed Mann Whitney and Kruskal-Wallis followed by Dunn’s Multiple Comparison tests for immature and mature NK subsets, one-way ANOVA followed by Tukey’s Multiple Comparison test for hypermature NK subsets). (C) Percentage of bone marrow CD158b-positive NK subsets in NBM (n = 30), MDS (n = 25), and AML (n = 8) cases. Bars represent the mean ± SEM (**P < 0.01, *P < 0.05, ns, not significant; Mann Whitney and Kruskal-Wallis followed by Dunn’s Multiple Comparison tests for immature and mature NK subsets, one-way ANOVA followed by Tukey’s Multiple Comparison test for hypermature NK subsets). (D) Percentage of bone marrow CD158e1-positive NK subsets in NBM (n = 30), MDS (n = 25), and AML (n = 8) cases. Bars represent the mean ± SEM (*P < 0.05, ns, not significant; Kruskal-Wallis followed by Dunn’s Multiple Comparison test).