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Mesenchymal stromal cells of the bone marrow and natural killer cells: cell interactions and cross modulation

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Journal of Cell Communication and Signaling Aims and scope

Abstract

Bone marrow-derived mesenchymal stromal cells (BM-MSCs) are multipotent progenitor cells that have shown promise for several different therapeutic applications. As they are able to modulate the function of several types of immune cells, BM-MSCs are highly important in the field of cell-based immunotherapy. Understanding BM-MSC-natural killer (NK) cell interactions is crucial for improving their therapeutic efficiency. Here, we observed that the type of NK cell-activating cytokine (e.g., IL-2, IL-12, IL-15 and IL-21) strongly influenced the outcomes of their interactions with BM-MSCs. The expression patterns of the ligands (CD112, CD155, ULPB-3) and receptors (LAIR, NCR) mediating the cross-talk between BM-MSCs and NK cells were critically modulated following co-culture. BM-MSCs partially impaired NK cell proliferation but up-regulated their secretion of IFN-γ and TNF-α. As they are cytotoxic, activated NK cells induced the killing of BM-MSCs. Indeed, BM-MSCs triggered the degranulation of NK cells and increased their release of perforin and granzymes. Interestingly, activated NK cells induced ROS generation within BM-MSCs that caused their decreased viability and reduced expression of serpin B9. Collectively, our observations reveal that BM-MSC-NK cell interactions may impact the immunobiology of both cell types. The therapeutic potential of BM-MSCs will be significantly improved once these issues are well characterized.

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Fig. 1: BM-MSCs are killed by activated PBMCs.
Fig. 2: NK cells are responsible for BM-MSC death.
Fig. 3: NK cytokine activation differentially induces cytotoxicity in BM-MSCs.
Fig. 4: NK ligand expression by BM-MSCs.
Fig. 5: NK cell expression of LAIR.
Fig. 6: Effects of BM-MSCs on NK cell proliferation.
Fig. 7: Effects of BM-MSCs on NK cell cytokine secretion.
Fig. 8: Effects of BM-MSCs on NK cell degranulation.
Fig. 9: Effects of BM-MSCs on NK cell cytotoxic components.
Fig. 10: Effects of NK cells on ROS generation by BM-MSCs.
Fig. 11: Effects of NK cells on serpin expression by BM-MSCs.

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Acknowledgements

This project was supported by “Le Fonds National de la Recherche Scientifique, F.R.S.-FNRS” and the “Télévie”.

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Correspondence to Mohammad Fayyad-Kazan.

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All procedures performed in studies involving human participants were in accordance with the ethical standards of the ethics committee of the “Institut Jules Bordet” (Belgium) and with the 1964 Helsinki declaration and its later amendments.

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Informed consent was obtained from all individual participants included in the study.

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All authors declare that they have no conflict of interest

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Hussein Fayyad-Kazan and Laurence Lagneaux are senior co-authors.

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Najar, M., Fayyad-Kazan, M., Meuleman, N. et al. Mesenchymal stromal cells of the bone marrow and natural killer cells: cell interactions and cross modulation. J. Cell Commun. Signal. 12, 673–688 (2018). https://doi.org/10.1007/s12079-018-0448-4

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  • DOI: https://doi.org/10.1007/s12079-018-0448-4

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