Phase 2 Breast Cancer Trial, Recruiting NCT05020574 Sponsor: University of California, San Francisco Condition: Breast Cancer
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Phase 2 Breast Cancer Trial, Recruiting

NCT05020574
Recruiting Phase 2

Who may be able to join

AI generated eligibility summary. Written by an AI model from the official source data and checked on a sample basis. It can contain mistakes, so confirm anything important against the original source. How we use AI

Who might be able to join this trial:

  • You have been diagnosed with breast cancer (confirmed by a tissue test) or carry a genetic risk factor for breast cancer
  • You are 18 years of age or older
  • You are planning to have a mastectomy with immediate placement of a tissue expander or breast implant at the same time
  • You are able to understand and are willing to sign a written consent form
  • It has been at least 4 weeks since you finished chemotherapy or radiation therapy

Who may not be able to join:

  • You have a serious medical condition or abnormal lab results that could put you at risk by participating (confirm with trial site)
  • You are currently pregnant or breastfeeding
  • You have taken antibiotics at any point in the 90 days before signing the consent form
  • You have taken probiotic supplements or products at any point in the 90 days before signing the consent form
  • You have a known or reported allergic reaction to the specific antibiotics used in this study (confirm with trial site for details on which antibiotics are involved)
  • You are male

Important: Always verify eligibility with the trial site directly before applying.

Based on publicly available eligibility criteria from ClinicalTrials.gov. Verify directly with the trial site before acting. This is not medical advice.

This is a simplified plain English summary of the eligibility criteria. Full criteria are set by the trial investigators and may include additional requirements not shown here. Never self-exclude from a trial based on this summary. Contact the trial site directly to confirm your eligibility.
Last synced 2 July 2026
Phase 2: approximately ~30% of drugs entering this phase reach regulatory approval, based on published industry-wide historical data. This is not specific to this trial.
Phase success rates shown are historical industry-wide averages based on published data. They are not a prediction for this specific trial or your individual situation.

GP referral letter

Print a one-page summary to share with your doctor.

Trial details

Status
Recruiting
Phase
Phase 2
Registry
ClinicalTrials.gov
Start date
28 September 2021
Est. completion
31 December 2026

Where this trial is recruiting

🇺🇸 United States

Primary endpoints

Proportion of tissue samples obtained successfully over time; Proportion of aspirate samples obtained successfully overall; Proportion of tissue samples successfully producing microbiome data; Proportion of aspirate samples successfully producing microbiome data; Proportion of any samples successfully producing microbiome data; Correlation of the change in breast microbiome over time with total duration of antibiotics (Cohort A only)

Can't join this trial?

Expanded access pathways

If this trial is not available to you, other access pathways may exist. In Australia, the TGA Special Access Scheme allows access to unapproved therapeutic goods for individual patients.

TGA Special Access Scheme information

Find other recruiting trials on ClinicalTrials.gov

Data last synced from ClinicalTrials.gov: 2 July 2026. Trial status can change. Always verify current status directly with the trial site before making any decision.

Trial recruitment status can change without notice between our nightly data updates. Always contact the trial site directly to confirm current recruitment status before making any decisions or travel arrangements.

View original record on ClinicalTrials.gov