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Changes in expression of Ki-67, CD16 and CD56 by natural killer cells from peripheral blood mononuclear cells in the setting of recurrent miscarriage after in vitro culturing in the presence of trophoblast cells and IL-2

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Summary

The aim of this research was to assess the proliferative activity of Natural Killer Cells (NK cells) from Peripheral Blood Mononuclear Cells (PBMCs) in the presence of trophoblast cells in women with a history of recurrent miscarriages. We examined the peripheral blood of women with recurrent miscarriage in the proliferative (n = 12) or secretory (n = 13) phase of their menstrual cycle, and pregnant women with a history of recurrent miscarriage at 6–7 weeks of their current pregnancy (n = 14). Controls were fertile non-pregnant women in the proliferative (n = 11) or secretory (n = 13) phase of their menstrual cycle, and pregnant women at 6–7 weeks of a physiologically normal pregnancy (n = 20). We used IL-2 as a factor maintaining PBMCs viability during long-term culturing. We established that culturing in the presence of IL-2 contributed to an increase in the number of CD56+CD16− NK cells and to a decrease in the number of CD56+CD16+ NK cells from PBMCs compared with these numbers before culturing in both healthy women and in women with recurrent miscarriage. After culturing of PBMCs in the presence of trophoblast cells and IL-2 (compared with culturing without trophoblast cells), the intensity of Ki-67 expression by NK cells was reduced in the whole NK cell population (CD3−CD56+), and in the CD56+CD16− and CD56+CD16+ populations of NK cells in women with recurrent miscarriage and in healthy controls. The intensity of CD56 expression was reduced in the presence of trophoblast cells and IL-2 in non-pregnant women with recurrent miscarriage in the secretory versus the proliferative phase of the menstrual cycle.

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Acknowledgements

The authors express their gratitude to A.N. Viknianshchuk and E.A. Mikhailova for their technical assistance in obtaining the experimental data.

Funding

The research was supported by the Grant of the President of the Russian Federation for government support of the leading scientific schools of the Russian Federation (Grant No. NSh-2873.2018.7. Assessment of NK Cell Proliferation to Trophoblast Cells). The research was partially carried out within the framework of the government Program No. AAAA-A19-119021290116-1 (cell culturing).

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Correspondence to V. A. Mikhailova.

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Mikhailova, V.A., Khokhlova, E.V., Bazhenov, D.O. et al. Changes in expression of Ki-67, CD16 and CD56 by natural killer cells from peripheral blood mononuclear cells in the setting of recurrent miscarriage after in vitro culturing in the presence of trophoblast cells and IL-2. Cytotechnology 71, 861–871 (2019). https://doi.org/10.1007/s10616-019-00331-4

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  • DOI: https://doi.org/10.1007/s10616-019-00331-4

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