Effects of Intrauterine Administration of Autologous PBMC Modulated With IFNt on Endometrial Cell Populations

March 7, 2023 updated by: Nadezhda Women's Health Hospital

Effects of Intrauterine Administration of Autologous Peripheral Blood Mononuclear Cells (PBMC) Modulated With Interferon Tau (IFNt) on Endometrial Cell Populations

The aim of this clinical trial is to investigate the change in endometrial composition during the window of implantation following intrauterine administration of PBMC immunomodulated with IFNt.

Patients seeking assisted reproductive therapy will be invited to participate. Two endometrial biopsies will be obtained from each patient during mid-secretory phase of two consecutive menstrual cycles. The first biopsy will be obtained one month before the intervention, and the second one - a day after intrauterine administration of the tested cell treatment which will take place the following month.

Immunohistochemistry analysis of the cell composition of the endometrium will be performed.

Study Overview

Detailed Description

Female patients with no known uterine pathologies and good general health undergoing treatment for unexplained infertility will be identified and invited to participate in the study. Endometrial biopsy will be obtained seven days after luteinizing hormone (LH) surge during a natural cycle. The following month, 5 days after LH surge, peripheral blood mononuclear cells (PBMC) will be isolated from patients' peripheral blood by density gradient (1.077g/ml) centrifugation and suspended in culture medium. The obtained PBMC will be incubated with 500 IU IFNt at 37˚C for 24 hours. This cell suspension will be carefully introduced in the uterine cavity by catheter on day 6 post LH surge. A second biopsy will be obtained the following day (LH+7).

Immunohistochemistry evaluation of endometrial tissue will be performed in terms of quantities and spatial distribution of various cell types.

Study Type


Enrollment (Anticipated)



  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Study Locations

  • Bulgaria
      • Sofia, Bulgaria, 1330
        • Recruiting
        • Nadezhda Women's Health Hospital
        • Contact:
        • Contact:

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

18 years to 50 years (Adult)

Accepts Healthy Volunteers


Genders Eligible for Study



Inclusion Criteria:

  • Participating in Assisted Reproduction Treatment
  • Having primary infertility
  • Having regular menstrual cycles
  • Having signed informed consent

Exclusion Criteria:

  • Uterine pathologies
  • Endometrial bacterial infections
  • Active endometrial inflammation
  • Polycystic ovary syndrome
  • Presence of auto antibodies such as anti-TPO (thyroid peroxidase), anti-TG (thyroglobulin), ACA (anticentromere antibodies), APA (antiphospholipid antibodies), ANA (antinuclear antibodies), and anti-dsDNA
  • Presence of mutations involving the coagulation system such as deficiency of factor XII, Pro C, Pro S
  • Oncological condition
  • Positive HIV (human immunodeficiency virus), HCV (hepatitis C virus) or HBV (hepatitis B virus) tests

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: N/A
  • Interventional Model: Single Group Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: Endometrial composition before and after autologous modulated PBMC administration
The endometrial cell composition in terms of cell quantities and spatial distribution will be compared before and after intrauterine administration of immunomodulated PBMC.
Standard density gradient centrifugation will be performed to obtain autologous PBMC from patients' peripheral blood (9 ml). Isolated cells will be suspended in RPMI 1640 supplemented with 10% HSA (human serum albumin) and incubated in the presence of 500 IU/ml IFNt for 24 h at 37˚C. The cultured cell suspension will be introduced into the uterine cavity via a catheter.

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Change in the numbers of certain endometrial cell populations (immune cells, stem cells, senescent cells) from their levels one month prior to intrauterine administration of immunomodulated PBMC
Time Frame: One month prior to and one day following intrauterine administration of cell treatment
Immunohistochemical analysis of endometrial biopsies
One month prior to and one day following intrauterine administration of cell treatment

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Anticipated)

March 13, 2023

Primary Completion (Anticipated)

March 14, 2026

Study Completion (Anticipated)

April 28, 2026

Study Registration Dates

First Submitted

March 7, 2023

First Submitted That Met QC Criteria

March 7, 2023

First Posted (Actual)

March 20, 2023

Study Record Updates

Last Update Posted (Actual)

March 20, 2023

Last Update Submitted That Met QC Criteria

March 7, 2023

Last Verified

March 1, 2023

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

  • 7/28022023

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?


Drug and device information, study documents

Studies a U.S. FDA-regulated drug product


Studies a U.S. FDA-regulated device product


This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact [email protected]. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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