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Updated: Sep 19, 2025

Multiplexed Fluorescent Immunohistochemical Staining of Four Endometrial Immune Cell Types in Recurrent Miscarriage

Multiplexed Fluorescent Immunohistochemical Staining of Four Endometrial Immune Cell Types in Recurrent Miscarriage

Published on: August 4, 2021

Hystero-embryoscopy as a tool for RPL immunological research at the maternal-fetal interface.

Valentina Bruno¹, Brunella Zizolfi², Margherita Ferretti³

¹Gynecologic Oncology Unit, Department of Experimental Clinical Oncology, IRCCS Regina Elena National Cancer Institute, Rome, Italy.

|June 7, 2025

Summary

Hystero-embryoscopy precisely isolates fetal and maternal tissues, enabling accurate immune analysis for recurrent pregnancy loss. This method minimizes contamination, improving diagnostic and therapeutic insights for unexplained RPL.

Keywords:

Decidua Immune microenvironment Inflammation Recurrent pregnancy loss Trophoblast

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Last Updated: Sep 19, 2025

Multiplexed Fluorescent Immunohistochemical Staining of Four Endometrial Immune Cell Types in Recurrent Miscarriage

Multiplexed Fluorescent Immunohistochemical Staining of Four Endometrial Immune Cell Types in Recurrent Miscarriage

Published on: August 4, 2021

Author Spotlight: Advancing Reproductive Immunology with a Protocol for the Quantitative Evaluation of Endometrial Immune Cells

Author Spotlight: Advancing Reproductive Immunology with a Protocol for the Quantitative Evaluation of Endometrial Immune Cells

Published on: October 13, 2023

Author Spotlight: Multiplex Immunohistochemistry for Understanding Immune Regulation by Uterine NK Cells in Pregnancy

Author Spotlight: Multiplex Immunohistochemistry for Understanding Immune Regulation by Uterine NK Cells in Pregnancy

Published on: October 25, 2024

Area of Science:

Reproductive Immunology
Maternal-Fetal Interface Immunology
Gynecologic Pathology

Background:

Unexplained recurrent pregnancy loss (uRPL) is linked to abnormal immune responses at the fetal-maternal interface in 50-60% of cases.
Understanding these immune mechanisms is crucial for risk assessment, prognosis, and therapy.
Current research methods face limitations like invasiveness and sample contamination, potentially biasing results.

Purpose of the Study:

To evaluate the effectiveness of hystero-embryoscopy in obtaining high-quality, uncontaminated samples from the maternal-fetal interface.
To assess the utility of hystero-embryoscopy for studying the immunological basis of recurrent pregnancy loss (RPL).

Main Methods:

A multicenter prospective study involving 10 women with first-trimester miscarriage.
Surgical treatment using embryo-hysteroscopy to selectively collect decidual and chorionic villous tissues separately.
Transcriptome sequencing and bioinformatics analysis for assessing tissue integrity and contamination.

Main Results:

High RNA integrity numbers (median RIN 8.4 ± 1.1) and adequate sequencing depth confirmed sample quality.
Bioinformatics analysis showed no cross-tissue contamination, evidenced by distinct transcriptional profiles of decidual and villous tissues.
CD45 immunostaining and pathological validation supported the separation and purity of the collected tissues.

Conclusions:

Hystero-embryoscopy is an effective technique for precise immunological profiling at the maternal-fetal interface.
This method significantly minimizes sample contamination, offering a reliable approach for RPL research.
The findings support the use of hystero-embryoscopy for detailed immunological investigation in unexplained recurrent pregnancy loss.