Oral Aromatase Inhibitors Modify the Gut Microbiome

NCT ID: NCT05030038

Last Updated: 2025-11-14

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

RECRUITING

Total Enrollment

25 participants

Study Classification

OBSERVATIONAL

Study Start Date

2022-03-29

Study Completion Date

2026-04-30

Brief Summary

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The purpose of this research is to study the bacteria in participants' gut before receiving a medicine called an aromatase inhibitor for breast cancer and after participants receive medicine for breast cancer.

Detailed Description

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Primary Objective: To describe the microbiome shift of gut microbiome from baseline after 4-weeks and 12-weeks of oral aromatase inhibitor treatment.

Secondary Objective

* To correlate gut microbiome populations with circulating sex hormone metabolite concentrations at baseline and 12 weeks.
* To describe the correlation of change in the microbiome populations with change in circulating sex hormone metabolite concentrations from baseline to 12 weeks.

Conditions

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Breast Cancer

Keywords

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Gut microbiome Circulating sex hormone metabolite concentrations

Study Design

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Observational Model Type

COHORT

Study Time Perspective

PROSPECTIVE

Study Groups

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Aromatase inhibitor for breast cancer treatment

Participants will receive their standard of care for breast cancer treatment which includes an aromatase inhibitor. Pre-study assessments will be done at baseline as well as stool and blood samples at baseline, then again at 4 weeks and at 12 weeks during the course of the trial.

Fecal swab collection

Intervention Type BIOLOGICAL

Participants will collect fecal sample at home and either mail in the sample, or drop it off at the lab

Blood samples

Intervention Type BIOLOGICAL

Participants will have approximately 1 teaspoon of blood withdrawn from a vein, for research, on 2 different occasions. The total amount of blood withdrawn during the study will be approximately 2 teaspoons.

Interventions

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Fecal swab collection

Participants will collect fecal sample at home and either mail in the sample, or drop it off at the lab

Intervention Type BIOLOGICAL

Blood samples

Participants will have approximately 1 teaspoon of blood withdrawn from a vein, for research, on 2 different occasions. The total amount of blood withdrawn during the study will be approximately 2 teaspoons.

Intervention Type BIOLOGICAL

Eligibility Criteria

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Inclusion Criteria

* Pathologic diagnosis in situ or invasive breast cancer for which initiating aromatase inhibitors therapy is recommended or initiating aromatase inhibitors for risk reduction.
* ECOG performance status 0,1, 2, 3.
* Age ≥ 18 years
* HER2+ breast cancer is allowed if patients are on a monoclonal antibody therapy for which a change is not anticipated while on study (12 weeks) and they have been on the monoclonal antibody therapy for at least 4 weeks.
* Ability to read, understand and evaluate study materials and willingness to sign a written informed consent document.

Exclusion Criteria

* Have been on antibiotics within 4 weeks of enrollment.
* Administered chemotherapy less than 4 weeks prior to enrollment.
* Hormone replacement (defined as only estrogen and/or progesterone replacement) or anti-estrogen therapy within 4 weeks of starting aromatase inhibitors
* Use of antibody drug conjugate (HER2+ breast cancer)
* Male breast cancer
* Any serious and/or unstable pre-existing medical, psychiatric, or other existing condition that would prevent compliance with the trial or consent process
Minimum Eligible Age

18 Years

Eligible Sex

FEMALE

Accepts Healthy Volunteers

No

Sponsors

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Wake Forest University Health Sciences

OTHER

Sponsor Role lead

Responsible Party

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Responsibility Role SPONSOR

Principal Investigators

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Katherine Ansley, MD

Role: PRINCIPAL_INVESTIGATOR

Wake Forest Baptist Health Sciences

Locations

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Wake Forest Baptist Health Sciences

Winston-Salem, North Carolina, United States

Site Status RECRUITING

Countries

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United States

Central Contacts

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Study Coordinator

Role: CONTACT

Phone: 336-713-5435

Email: [email protected]

Facility Contacts

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Study Coordinator

Role: primary

Other Identifiers

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WFBCCC 74121

Identifier Type: OTHER

Identifier Source: secondary_id

IRB00076577

Identifier Type: -

Identifier Source: org_study_id