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Status unknownNCT05862805Updated Aug 19, 2024

PAI-1, tPA, TFPI and HEECs in Uterine Hemostasis

A Phase 1/2 interventional study of Sample Collection and Endometrial Biopsy in Menstrual Bleeding, Heavy, sponsored by Oregon Health and Science University. Status unknown at 1 site in United States. Open to female participants aged 18 Years to 45 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2024-08-19.

Sponsored by Oregon Health and Science University · Phase 1/2, Interventional, and Other

The sponsor has not verified this record recently (last verified Aug 2024), so the status shown — last known as Recruiting — may be out of date.
Phase
Phase 1/2
Study type
Interventional
Enrollment
70
Allocation
Non-randomized
Ages
18 Years to 45 Years
Sex
Female
01

Study summary

The purpose of the study is to learn more about the role of blood clotting factor proteins and cells in menstrual (period) bleeding. The investigators are hoping to identify differences in these proteins and cells in the menstrual blood of individuals with heavy periods compared to menstruating individuals who do not have heavy periods.

Read the detailed description

The purpose of this study is to learn if human endometrial endothelial cells (HEECs) regulate human uterine hemostasis through the up and down-regulation of pro- and anti-coagulant factors in menstrual blood including PAI-1, factor XI (FXI)-PAI-1 complex, tPA, and TFPI.

This study will enroll participants with heavy menstrual bleeding (HMB) and participants without HMB. Coagulation factors will be measured in menstrual blood and mRNA for these factors will be quantified from cultured HEECS from endometrial biopsies and compared between groups.

02

Conditions studied

  • Menstrual Bleeding, Heavy

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03

In context

Menorrhagia

186 studies on the registry are indexed under Menorrhagia; 32 are open to participants now.

This study's planned enrollment of 70 is below the median of 100 across 137 interventional studies indexed under Menorrhagia.

Browse Menorrhagia studies →

Lead sponsor

Oregon Health and Science University is the lead sponsor of 694 studies on the registry; 132 are open to participants now.

Of its 51 completed or terminated interventional studies of FDA-regulated products, 39 (76%) have results posted.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years to 45 Years
Sexes eligible
Female
Accepts healthy volunteers
Yes

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • Regularly menstruating participants between 18-45 years of age

Exclusion criteria

Exclusion Criteria:

  • Pregnancy within 3 months of enrollment
  • Lactating at the time of enrollment
  • Hormonal contraceptive use or use of the copper intrauterine device (IUD)
  • Antifibrinolytic use
  • Inherited or acquired bleeding disorder or anticoagulant use
  • Known structural cause of HMB
  • Inability to complete PBACs
  • Unwilling to refrain from sexual intercourse for the two weeks prior to endometrial biopsy
05

Study design

Phase
Phase 1 / Phase 2
Primary purpose
Other
Allocation
Non-randomized
Intervention model
Parallel assignment
Masking
None (open label)
Enrollment
70 participants (estimated)

Study arms

  • Active comparator
    Heavy Menstrual Bleeding

    Participants with heavy menstrual bleeding will provide daily samples of menstrual blood for a single cycle and undergo a single endometrial biopsy for HEEC culture.

    Procedure: Sample Collection and Endometrial Biopsy

  • Active comparator
    Regular Mensural Bleeding

    Participants with normal menstrual bleeding will provide daily samples of menstrual blood for a single cycle and undergo a single endometrial biopsy for HEEC culture.

    Procedure: Sample Collection and Endometrial Biopsy

Interventions

  • ProcedureSample Collection and Endometrial Biopsy

    Participants will provide daily samples of menstrual blood for a single cycle and undergo a single endometrial biopsy for HEEC culture.

06

What researchers measure

Primary outcomes

  1. Total number of mRNA copies from HEEC culture of tPA

    The total number of mRNA copies of tPA in HEEC cultures from enrollment to 60 days.

    Time frame: Enrollment to 60 days

  2. Total number of mRNA copies from HEEC culture of PAI-1

    The total number of mRNA copies of PAI-1 in HEEC cultures from enrollment to 60 days.

    Time frame: Enrollment to 60 days

  3. Total number of mRNA copies from HEEC culture of TFPI

    The total number of mRNA copies of TFPI in HEEC cultures from enrollment to 60 days.

    Time frame: Enrollment to 60 days

  4. Change in the numerical score of Pictorial Blood Loss Assessment

    The change in the Pictorial Blood Loss Assessment Charts (PBACs) from baseline to 60 days. Participants will be asked to tally the number of pads and tampons, the level of saturation of menstrual blood on the pads or tampons, and the number of clots. Scores greater than 100 are considered diagnostic of heavy menstrual bleeding.

    Time frame: Enrollment to 60 days

07

Study locations

1 of 1 sites recruiting
  • OHSU
    Portland, Oregon 97239, United States
    Recruiting
08

Timeline

Tracking since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reached

Started Jul 2023 (actual). Primary completion is estimated for Jul 2025, 24 months after the start.

How these figures are worked out, and which studies are left out of them.

Registered
May 8, 2023
First posted
May 17, 2023
StartActual
Jul 12, 2023
Primary completionEst.
Jul 2025
CompletionEst.
Jul 2026
Last update
Aug 19, 2024
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on Aug 19, 2024, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
09

Registry details

Key details

Study ID
NCT05862805
Responsible party
Bannowb (Principal Investigator, Oregon Health and Science University) — Principal investigator
First posted
May 17, 2023
Start date
Jul 12, 2023
Primary completion
Jul 2025 (estimated)
Completion
Jul 2026 (estimated)
Last update
Aug 19, 2024

Study contacts

Women's Health Research Unit Department of Ob/Gyn
Contact
whru@ohsu.edu
503-494-3666

Oversight

Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is status unknown, as verified in Aug 2024. You cannot join it, but the record below documents what was studied.

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