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Completed Phase 1Phase 2 Interventional Results available

A Study of ZN-c5 in Subjects With Breast Cancer

ClinicalTrials.gov ID: NCT03560531

Public ClinicalTrials.gov record NCT03560531. Field values are reproduced from the official study page; the official ClinicalTrials.gov record remains the source of truth for eligibility, enrollment, and contact information.

ClinicalTrials.gov public records Last synced Jul 23, 2026, 5:25 AM EDT

Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.

Official title

A Phase 1/2 Open Label, Multicenter Study to Assess the Safety, Tolerability, Pharmacokinetics, and Anti-Tumor Activity of ZN-c5 Alone and in Combination With Palbociclib in Subjects With Estrogen-Receptor Positive, Human Epidermal Growth Factor Receptor-2 Negative Advanced Breast Cancer

Study identification

NCT ID
NCT03560531
Recruitment status
Completed
Study type
Interventional
Phase
Phase 1, Phase 2
Lead sponsor
Zeno Alpha Inc.
Industry
Enrollment
181 participants

Conditions and interventions

Conditions

Interventions

  • ZN-c5 Drug
  • Palbociclib Drug

Drug

Eligibility (public fields only)

Age range
18 Years and older
Sex
All
Healthy volunteers
Healthy volunteers not accepted

This page does not interpret eligibility. Detailed inclusion and exclusion criteria are on the official ClinicalTrials.gov record.

Study timeline

Start date
Nov 29, 2018
Primary completion
Apr 25, 2022
Completion
Dec 21, 2022
Last update posted
Aug 8, 2024

2018 – 2022

United States locations

U.S. sites
11
U.S. states
9
U.S. cities
9
Facility City State ZIP Site status
Site 3 Tucson Arizona 85719
Site 5 Los Angeles California 91010
Site 48 Bethesda Maryland 20817
Site 47 St Louis Missouri 63110
Site 7 New York New York 10029
Site 2 New York New York 10032
Site 50 Charleston South Carolina 29414
Site 4 Nashville Tennessee 37240
Site 1 Houston Texas 77030
Site 8 Houston Texas 77030
Site 6 Seattle Washington 98195

Site contact phone numbers, emails, and investigator names are intentionally not displayed here. Open the official ClinicalTrials.gov record for site contact information.

Non-U.S. locations

This page focuses on the U.S. directory. The official record also lists 27 non-U.S. sites.

About this trial record page

What this page shows
Public field values for ClinicalTrials.gov record NCT03560531, including study identification, conditions, interventions, eligibility (age, sex, healthy volunteer), timeline, and U.S. site list.
What this page does not do
No medical advice, eligibility judgments, treatment recommendations, study quality scoring, or AI-generated medical summaries. No site contact phone numbers, emails, or investigator names.
Where the data comes from
Sourced from the official ClinicalTrials.gov public API. The official record is the source of truth.
Last refresh
Last update posted Aug 8, 2024 · Synced Jul 23, 2026

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Open the official record

The complete protocol, eligibility criteria, and contact information for NCT03560531 live on ClinicalTrials.gov.

View official ClinicalTrials.gov record →