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    Characterization of the interaction between human decidua parietalis mesenchymal stem/stromal cells and natural killer cells

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    Author
    Abumaree, MH; Bahattab, E; Alsadoun, A; Al Dosaimani, A; Abomaray, FM; Khatlani, T; Kalionis, B; El-Muzaini, MF; Alawad, AO; AlAskar, AS
    Date
    2018-04-12
    Source Title
    Stem Cell Research and Therapy
    Publisher
    BMC
    University of Melbourne Author/s
    Kalionis, Bill
    Affiliation
    Obstetrics and Gynaecology
    Metadata
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    Document Type
    Journal Article
    Citations
    Abumaree, M. H., Bahattab, E., Alsadoun, A., Al Dosaimani, A., Abomaray, F. M., Khatlani, T., Kalionis, B., El-Muzaini, M. F., Alawad, A. O. & AlAskar, A. S. (2018). Characterization of the interaction between human decidua parietalis mesenchymal stem/stromal cells and natural killer cells. STEM CELL RESEARCH & THERAPY, 9 (1), https://doi.org/10.1186/s13287-018-0844-y.
    Access Status
    Open Access
    URI
    http://hdl.handle.net/11343/254817
    DOI
    10.1186/s13287-018-0844-y
    Abstract
    BACKGROUND: Human decidua parietalis mesenchymal stem/multipotent stromal cells (DPMSCs) have unique phenotypic and functional properties that make them promising candidates for cell-based therapy. Here, we investigated DPMSC interaction with natural killer (NK) cells, and the effects of this interaction on NK cell phenotypic characteristics and functional activities. METHODS: DPMSCs isolated from the decidua parietalis of human fetal membranes were cultured with interleukin (IL)-2-activated and IL-2-unactivated NK cells isolated from healthy human peripheral blood. NK cell proliferation and cytolytic activities were then examined using functional assays. NK cell expression of receptors mediating the cytolytic activity against DPMSCs, and the mechanism underlying this effect on DPMSCs, were also examined using flow cytometry and light microscopy, respectively. RESULTS: DPMSCs stimulated IL-2-induced proliferation of resting NK cells and the proliferation of activated NK cells. Moreover, IL-2-activated NK cells, but not freshly isolated NK cells, efficiently lysed DPMSCs. The induction of this NK cell cytolytic activity against DPMSCs was mediated by the activating NK cell receptors NKG2D, CD69, NKp30, and NKp44. However, DPMSCs showed a direct induction of NK cell cytolytic activity through CD69. We also found that DPMSCs expressed the ligands for these activating NK cell receptors including Nectin-2, ULBP-2, MICA, and MICB. Although DPMSCs expressed HLA class I molecules, they were susceptible to lysis by NK cells, suggesting that HLA class I antigens do not play a significant role in NK cell cytolytic action. In addition, DPMSCs did not inhibit NK cell cytolytic activity against cancer cells. Importantly, DPMSCs significantly increased NK expression of inflammatory molecules with anticancer activities. CONCLUSIONS: We conclude that DPMSCs have potential for therapeutic application in cancer therapy, but not in transplantation or immunological diseases.

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