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The use of multiplex staining to measure the density and clustering of four endometrial immune cells around the implantation period in women with recurrent miscarriage: comparison with fertile controls

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Abstract

Serval studies showed an increased uterine natural killer cell density in women with recurrent miscarriage. However, no study has previously investigated the density and clustering of major immune cells simultaneously in precisely timed endometrial specimen section of this group of women. This study aimed to investigate the profile of endometrial immune cells populations and clustering level simultaneously in women with recurrent miscarriage and compare the results to fertile controls. A total of 30 women with unexplained recurrent miscarriage and 30 fertile controls were included in this study. Endometrial biopsy was performed precisely 7 days after LH surge. The cells density was expressed as percentage of positive immune cell/total stromal cells and the clustering of different endometrial cells was measured by R language toolbox ‘spatstat’. Multiplex immunohistochemical method was employed to stain a panel of human endometrium samples simultaneously with antibodies against CD3 for T cells, CD20 for B cells, CD68 for macrophages and CD56 for uterine natural killer cells. The median CD3+, CD68+ and CD56+ cell density in the miscarriage group were significantly higher than those of the fertile controls. In addition, the clustering between CD56+ uterine natural killer cells and CD68+ macrophages in the miscarriage group was significantly increased compared with fertile controls. In conclusion, the significant change in numbers of three out of four endometrial immune cell density and a significant increase in clustering between CD68+ and CD56+ cells suggest that several immune cells and their interactions may be important in the function of the endometrium; abnormal interactions may predispose to recurrent miscarriage.

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Acknowledgements

The authors wish to thank Mr. Guangcheng ZHANG (PhD candidate) in Department of Mathematics, Nanjing University for his assistance with the analysis of the spatial distribution analysis of four immune cells in endometrium using R language, and to thank research nurse Dr. Wing-Ching CHEUNG in Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong for recruiting patients. We also wish to express our gratitude to Professor Susan Laird, Head of Department of Biosciences and Chemistry at Sheffield Hallam University, for reviewing this article and making suggestions to improve it.

Funding

This study was supported by Hong Kong Obstetrical and Gynecological Trust Fund in 2018 and Hong Kong Health and Medical Research Fund (04152786).

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Correspondence to Joseph Kwong or Tin-Chiu Li.

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The authors declare that they have no conflict of interests.

Ethical approval

Approvals from Joint Chinses University of Hong Kong-New Territories East Cluster Clinical Research Ethics Committee was obtained for this study.

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All the endometrial biopsies were collected with the informed consent of the participants.

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10735_2020_9908_MOESM1_ESM.tiff

Supplementary file1 Supplementary Fig 1 Graphical representation of the AUC levels based on an L-function calculated for the endometrial immune cells clustering level. (TIFF 671 kb)

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Zhao, Y., Chen, X., Zhang, T. et al. The use of multiplex staining to measure the density and clustering of four endometrial immune cells around the implantation period in women with recurrent miscarriage: comparison with fertile controls. J Mol Hist 51, 593–603 (2020). https://doi.org/10.1007/s10735-020-09908-2

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  • DOI: https://doi.org/10.1007/s10735-020-09908-2

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