Changes in the immunophenotype of endometrium during implantation window receptivity formation in healthy fertile women

免疫分型 子宫内膜 男科 CD8型 间质细胞 生物 免疫系统 免疫学 流式细胞术 内分泌学 内科学 医学 癌症研究
作者
Yaroslava Anoshko,Boris V. Dons’koi,I. Sudoma,Ksenia Khazhylenko,Dariia V. Osypchuk,Y. Goncharova
出处
期刊:Placenta [Elsevier BV]
卷期号:143: 62-68
标识
DOI:10.1016/j.placenta.2023.10.002
摘要

Endometrial receptivity is largely determined by the immunophenotype of endometrium, especially uterine NK-cells (uNK). Immune component is directly involved in the formation of favourable microenvironment for the blastocyst implantation and placenta formation, but the way it changes during the maturation of endometrial tissue in healthy fertile women is still underexplored. The endometrium was collected from 47 healthy oocyte donors after controlled ovarian stimulation: 23 women on the day of oocytes retrieval (OR) and 24 women on the term of implantation window (IW). The OR group was analysed, published previously and used as a comparison group to show the dynamic of changes. Isolated endometrial lymphocytes and peripheral blood samples were stained with monoclonal antibodies and analysed according to the three-colour flow cytometry protocol. The proportion of NK-cells (CD3−CD56+) in endometrium grew significantly in the implantation window compared to the oocytes retrieval day. NK-cells acquired a more differentiated phenotype from the day of OR until IW: the expression of CD8 and CD158a significantly increased, while the expression of HLA-DR significantly decreased. Significant correlations between peripheral blood and endometrial NK-cells were found in CD8 expression during OR and IW, CD335(p46)neg and CD335(p46)++ subsets during IW term. Immunophenotype of receptive endometrium forms due to the accumulation of uNK-cells, which actively proliferate, become mature, differentiative, and ready to meet the embryo. Endometrial immunophenotype is peculiar and specific but not autonomic and isolated. Differentiation (CD8 on NK-cells), and activity (p46 on NK-cells) of peripheral blood lymphocytes is reflected in endometrial lymphocytes profile, and therefore the research of peripheral blood immunophenotype is relevant.
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