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IL-2 Stimulated but Not Unstimulated NK Cells Induce Selective Disappearance of Peripheral Blood Cells: Concomitant Results to a Phase I/II Study

Abstract

In an ongoing clinical phase I/II study, 16 pediatric patients suffering from high risk leukemia/tumors received highly purified donor natural killer (NK) cell immunotherapy (NK-DLI) at day (+3) +40 and +100 post haploidentical stem cell transplantation. However, literature about the influence of NK-DLI on recipient's immune system is scarce. Here we present concomitant results of a noninvasive in vivo monitoring approach of recipient's peripheral blood (PB) cells after transfer of either unstimulated (NK-DLI(unstim)) or IL-2 (1000 U/ml, 9-14 days) activated NK cells (NK-DLI(IL-2 stim)) along with their ex vivo secreted cytokine/chemokines. We performed phenotypical and functional characterizations of the NK-DLIs, detailed flow cytometric analyses of various PB cells and comprehensive cytokine/chemokine arrays before and after NK-DLI. Patients of both groups were comparable with regard to remission status, immune reconstitution, donor chimerism, KIR mismatching, stem cell and NK-DLI dose. Only after NK-DLI(IL-2 stim) was a rapid, almost complete loss of CD56(bright)CD16(dim/-) immune regulatory and CD56(dim)CD16(+) cytotoxic NK cells, monocytes, dendritic cells and eosinophils from PB circulation seen 10 min after infusion, while neutrophils significantly increased. The reduction of NK cells was due to both, a decrease in patients' own CD69(-) NCR(low)CD62L(+) NK cells as well as to a diminishing of the transferred cells from the NK-DLI(IL-2 stim) with the CD56(bright)CD16(+/-)CD69(+)NCR(high)CD62L(-) phenotype. All cell counts recovered within the next 24 h. Transfer of NK-DLI(IL-2 stim) translated into significantly increased levels of various cytokines/chemokines (i.e. IFN-γ, IL-6, MIP-1β) in patients' PB. Those remained stable for at least 1 h, presumably leading to endothelial activation, leukocyte adhesion and/or extravasation. In contrast, NK-DLI(unstim) did not cause any of the observed effects. In conclusion, we assume that the adoptive transfer of NK-DLI(IL-2 stim) under the influence of ex vivo and in vivo secreted cytokines/chemokines may promote NK cell trafficking and therefore might enhance efficacy of immunotherapy.

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References
1.
Middleton J, Patterson A, Gardner L, Schmutz C, Ashton B . Leukocyte extravasation: chemokine transport and presentation by the endothelium. Blood. 2002; 100(12):3853-60. DOI: 10.1182/blood.V100.12.3853. View

2.
Passweg J, Stern M, Koehl U, Uharek L, Tichelli A . Use of natural killer cells in hematopoetic stem cell transplantation. Bone Marrow Transplant. 2005; 35(7):637-43. DOI: 10.1038/sj.bmt.1704810. View

3.
Farag S, Fehniger T, Ruggeri L, Velardi A, Caligiuri M . Natural killer cell receptors: new biology and insights into the graft-versus-leukemia effect. Blood. 2002; 100(6):1935-47. DOI: 10.1182/blood-2002-02-0350. View

4.
Rizzieri D, Storms R, Chen D, Long G, Yang Y, Nikcevich D . Natural killer cell-enriched donor lymphocyte infusions from A 3-6/6 HLA matched family member following nonmyeloablative allogeneic stem cell transplantation. Biol Blood Marrow Transplant. 2010; 16(8):1107-14. PMC: 3625653. DOI: 10.1016/j.bbmt.2010.02.018. View

5.
Meller B, Frohn C, Brand J, Lauer I, Schelper L, von Hof K . Monitoring of a new approach of immunotherapy with allogenic (111)In-labelled NK cells in patients with renal cell carcinoma. Eur J Nucl Med Mol Imaging. 2003; 31(3):403-7. DOI: 10.1007/s00259-003-1398-4. View