NCT03746535

Brief Summary

To test the hypothesis that estrogen suppression impairs endothelial dysfunction in endometriosis.

Trial Health

77
On Track

Trial Health Score

Automated assessment based on enrollment pace, timeline, and geographic reach

Enrollment
40

participants targeted

Target at P50-P75 for early_phase_1

Timeline
8mo left

Started Jul 2022

Longer than P75 for early_phase_1

Geographic Reach
1 country

1 active site

Status
recruiting

Health score is calculated from publicly available data and should be used for screening purposes only.

Trial Relationships

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Study Timeline

Key milestones and dates

Study Progress86%
Jul 2022Dec 2026

First Submitted

Initial submission to the registry

October 17, 2018

Completed
1 month until next milestone

First Posted

Study publicly available on registry

November 19, 2018

Completed
3.6 years until next milestone

Study Start

First participant enrolled

July 1, 2022

Completed
3.4 years until next milestone

Primary Completion

Last participant's last visit for primary outcome

December 1, 2025

Completed
1.1 years until next milestone

Study Completion

Last participant's last visit for all outcomes

December 31, 2026

Expected
Last Updated

May 23, 2025

Status Verified

May 1, 2025

Enrollment Period

3.4 years

First QC Date

October 17, 2018

Last Update Submit

May 22, 2025

Conditions

Outcome Measures

Primary Outcomes (2)

  • Flow Mediated Vasodilation Microvascular skin blood flow analysis

    Blood flow velocity will be measured using the Sonoscope S2 ultrasound imaging system.

    2 minutes

  • Microdialysis perfusions

    Following recovery from the microdialysis probe insertions we will measure resting skin blood flow (SkBF).

    15 minutes

Study Arms (2)

patients without endometriosis

ACTIVE COMPARATOR

Control subjects will be healthy women, with regular menses every 26-34 days. Subjects will be excluded if they have any symptoms of endometriosis, including severe dysmenorrhea or progressive cyclic pelvic pain or prior surgery showing evidence of endometriosis

Drug: Elagolix

patients with endometriosis

EXPERIMENTAL

Endometriosis will be diagnosed by history of the disease seen at the time of prior surgery or will be diagnosed by classic clinical symptoms of the disease (cyclic progressive pelvic pain) using prior surgical report reviewed by Dr. Taylor.

Drug: Elagolix

Interventions

Elagolix, 400 mg/day oral, 2X200 mg tablets/day for 4 days.

patients with endometriosispatients without endometriosis

Eligibility Criteria

Age18 Years - 45 Years
Sexfemale(Gender-based eligibility)
Gender Eligibility Detailswomen
Healthy VolunteersYes
Age GroupsAdult (18-64)

You may qualify if:

  • Young women between the ages of 18 and 45 years (Controls);
  • Young women between the ages of 18 and 45 years with endometriosis.

You may not qualify if:

  • Subjects who smoke
  • Subjects who have diabetes,
  • Subjects with sleep apnea or BP\>140/90 will be excluded.
  • Women with endometriosis and severe acute pain requiring immediate treatment will be excluded.

Contact the study team to confirm eligibility.

Sponsors & Collaborators

Study Sites (1)

Yale School of Medicine

New Haven, Connecticut, 06519, United States

RECRUITING

MeSH Terms

Conditions

Endometriosis

Interventions

elagolix

Condition Hierarchy (Ancestors)

Genital Diseases, FemaleFemale Urogenital DiseasesFemale Urogenital Diseases and Pregnancy ComplicationsUrogenital DiseasesGenital Diseases

Study Officials

  • Nina Stachenfeld, MD

    Yale University

    PRINCIPAL INVESTIGATOR

Central Study Contacts

Nina Stachenfeld, PhD

CONTACT

Study Design

Study Type
interventional
Phase
early phase 1
Allocation
NON RANDOMIZED
Masking
NONE
Masking Details
no masking, all subjects have endometriosis
Purpose
TREATMENT
Intervention Model
PARALLEL
Model Details: 2 cohort clinical trial
Sponsor Type
OTHER
Responsible Party
SPONSOR

Study Record Dates

First Submitted

October 17, 2018

First Posted

November 19, 2018

Study Start

July 1, 2022

Primary Completion

December 1, 2025

Study Completion (Estimated)

December 31, 2026

Last Updated

May 23, 2025

Record last verified: 2025-05

Locations