A Study of Lerociclib in Participants With Advanced Breast Cancer

April 22, 2026 updated by: EQRx, Inc.

A Phase 2 Study to Evaluate the Safety and Efficacy of Lerociclib in Participants With Advanced Breast Cancer

This is a multicenter, single-arm, open-label study to evaluate the safety and efficacy of lerociclib in combination with standard endocrine therapy in female or male participants with HR+/HER2- MBC. The study population will consist of either newly diagnosed, treatment naïve participants with HR+/HER2- MBC (1L population) and participants with HR+/HER2- MBC who have already progressed on first line endocrine therapy such as tamoxifen, anastrozole, or letrozole (2L population). All premenopausal or perimenopausal female participants, and all male participants, must be receiving goserelin for at least 28 days prior to entering the study and will remain on goserelin throughout the study, in accordance with the prescribing information and according to the study site's standard practice.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Terminated

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Enrollment (Actual)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
100

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Phase 2

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • Belgium
      • Edegem, Belgium, 2650
        • UZA
      • Leuven, Belgium, 3000
        • Ziekenhuizen K.U.Leuven, Campus gasthuisberg
      • Libramont, Belgium, 6800
        • CHA Libramont
      • Ottignies, Belgium, 1340
        • Clinique Saint-Pierre asbl
      • Sint-Niklaas, Belgium, 9100
        • vzw Verenigde Ziekenhuizen van Waas en Durme - VITAZ
  • Georgia
      • Batumi, Georgia, 6010
        • LTD "Brothers"
      • Tbilisi, Georgia, 0112
        • ARENSIA Exploratory Medicine LLC
      • Tbilisi, Georgia, 0112
        • Ltd Israeli-Georgian Medical Research Clinic Helsicore
      • Tbilisi, Georgia, 0144
        • LTD "Health House"
      • Tbilisi, Georgia, 0186
        • Ltd "Multiprofile Clinic Consilium Medulla "
  • Italy
      • Meldola, Italy, 47014
        • Istituto Romagnolo per lo Studio dei Tumori "Dino Amadori"
  • Mexico
      • Cuernavaca, Mexico, 66290
        • PanAmerican Clinical Research Cuernavaca
      • Querétaro, Mexico, 76100
        • PanAmerican Clinical Research, Querétaro
    • Jalisco
      • Guadalajara, Jalisco, Mexico, 44670
        • PanAmerican Clinical Research Guadalajara
  • Moldova
      • Chisinau, Moldova, MD-2025
        • IMSP Institutul Oncologic, Arsenia Exploratory Medicine
  • United States
    • Florida
      • Jacksonville, Florida, United States, 32256
        • Cancer Specialists of North Florida
    • Nebraska
      • Omaha, Nebraska, United States, 68130
        • Nebraska Cancer Specialists
    • Oregon
      • Salem, Oregon, United States, 97301
        • Oregon Oncology Specialists
    • Pennsylvania
      • York, Pennsylvania, United States, 17403
        • Cancer Care Associates of York, Inc.
    • Texas
      • Webster, Texas, United States, 16969
        • Tranquil Clinical Research
    • Washington
      • Tacoma, Washington, United States, 98405
        • Northwest Medical Specialties PLLC

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

18 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

  1. Participant must be 18 or the legal age of consent in the jurisdiction in which the study is taking place, at the time of signing the informed consent.
  2. Histologically and/or cytologically confirmed diagnosis of estrogen-receptor positive and/or progesterone receptor positive breast cancer by local laboratory and has HER2-negative breast cancer.
  3. Advanced (locoregionally recurrent not amenable to curative therapy, eg, surgery and/or radiotherapy, or metastatic) breast cancer
  4. Eastern Cooperative Oncology Group performance status (ECOG PS) 0 or 1.
  5. Adequate bone marrow and organ function
  6. Female that is not pregnant and agrees to contraceptive use that is consistent with local regulations regarding the methods of contraception to be used during the study
  7. Males agree to use a highly effective method of contraception and will refrain from donating sperm from the first dose of any study intervention
  8. Participant is capable of giving signed informed consent

Exclusion Criteria:

  1. Symptomatic visceral disease or any disease burden that makes the participant ineligible for endocrine therapy per the Investigator's best judgment.
  2. Peritoneal carcinomatosis.
  3. Inflammatory breast cancer at screening.
  4. Participant with central nervous system (CNS) involvement unless they are at least 4 weeks from prior therapy completion to starting the study treatment and have stable CNS tumor at the time of screening and not receiving steroids and/or enzyme inducing anti-epileptic medications for brain metastases.
  5. Clinically significant, uncontrolled heart disease and/or cardiac repolarization abnormality
  6. Has a history of prolonged QT syndrome or Torsades de Pointes
  7. Has received prior treatment with chemotherapy (except for neoadjuvant/ adjuvant chemotherapy) or any CDK4/6 inhibitor.
  8. Has received prior treatment with fulvestrant.
  9. Use of systemic estrogens

  10. Participant is currently receiving any of the following substances and cannot be discontinued 14 days prior to start the treatment:

    • Known strong or moderate CYP3A inducers or strong inhibition of CYP3A
    • Substances that have a narrow therapeutic window and are predominantly metabolized through CYP3A4/5.
  11. Echocardiogram done within the past 12 months with ejection fraction of ≤ 45% or documented history of congestive heart failure with reduced ejection fraction.
  12. Evidence of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection or oral temperature > 38°C at screening
  13. Interstitial pneumonia or severe impairment of lung function

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: N/A
  • Interventional Model: Single Group Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Other: Lerociclib + letrozole or fulvestrant

Letrozole, administered orally once daily in tablet form at 2.5 mg.

Fulvestrant, administered as an intramuscular injection, once every 2 weeks for the initial 3 doses and then once every 4 weeks (Q4W) thereafter, at 500 mg.
Drug: Lerociclib + Letrozole or Fulvestrant
All participants (1L and 2L populations) will receive an AI (letrozole) or fulvestrant plus lerociclib 150 mg BID.
Other Names:
  • Goserelin acetate implant for pre- or perimenopausal female and male participants only

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
Incidence of AEs and SAEs
Time Frame: Data were collected from study baseline until close-out visit per patient which was approximately 30 days after the last dose. This study data collection time frame varied per patient due to study termination with an average of 237.4 days on treatment.
The number and percentage of participants experiencing any TEAE and serious TEAE will be tabulated by line of therapy.
Data were collected from study baseline until close-out visit per patient which was approximately 30 days after the last dose. This study data collection time frame varied per patient due to study termination with an average of 237.4 days on treatment.

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
To Characterize the Safety and Tolerability of Lerociclib in Combination With Endocrine Therapy in Participants With 1L and 2L Hormone Receptor Positive (HR+)/Human Epidermal Growth Factor 2-negative (HER2-) Metastatic Breast Cancer (mBC).
Time Frame: Data were collected from study baseline until close-out visit per patient which was approximately 30 days after the last dose. This study data collection time frame varied per patient due to study termination with an average of 237.4 days on treatment.
Objective response rate, defined as the proportion of participants with a best overall response of complete response (CR) or partial response (PR) according to RECIST v1.1 as assessed by the Investigator.
Data were collected from study baseline until close-out visit per patient which was approximately 30 days after the last dose. This study data collection time frame varied per patient due to study termination with an average of 237.4 days on treatment.
Probability of Progression-Free Survival (PFS)
Time Frame: The timeframe for data collection was up to 18 months.
A secondary endpoint for this study was to investigate the efficacy of lerociclib in combination with endocrine therapy in participants with 1L and 2L HR+/HER2- mBC by line of therapy. Probability of Progression-Free Survival (PFS) was measured. Per protocol, PFS was defined as the time from first dose of lerociclib until the date of documented progressive disease (PD) or death, according to RECIST v1.1 as assessed by the Investigator.
The timeframe for data collection was up to 18 months.
Description of Kaplan-Meier Estimates Analysis for Progression-free Survival Event Analysis
Time Frame: Data were collected from study baseline until close-out visit per patient which was approximately 30 days after the last dose. This study data collection time frame varied per patient due to study termination with an average of 237.4 days on treatment.
Progression-free survival (PFS), defined as the time from first dose of lerociclib until the date of documented progressive disease (PD) or death, according to RECIST v1.1 as assessed by the Investigator.
Data were collected from study baseline until close-out visit per patient which was approximately 30 days after the last dose. This study data collection time frame varied per patient due to study termination with an average of 237.4 days on treatment.

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
EQRx, Inc.

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
December 21, 2021

Primary Completion (Actual)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
November 29, 2023

Study Completion (Actual)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
November 29, 2023

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
September 7, 2021

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
October 6, 2021

First Posted (Actual)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
October 20, 2021

Study Record Updates

Last Update Posted (Actual)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
May 14, 2026

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
April 22, 2026

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
April 1, 2026

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • EQ132-201

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

Yes

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

Clinical Trials on Advanced Breast Cancer

Clinical Trials on Lerociclib + Letrozole or Fulvestrant

Search Similar Trials

Sponsors and Collaborators

Medical Conditions

Drug Interventions

Conditions

Rare Diseases

Drug Interventions

Dietary Supplements

Sponsor/Collaborators

Locations

Cookie Settings

We use cookies to ensure that we give you the best experience on our website. For more details carefully read our Privacy and Cookies Policy. ...>>>You can change your preferences or withdraw your consent at any time by deleting the cookies from your website or computer as described in the policy. Please accept it and choose your preferences by ticking the corresponding boxes in the "Manage Settings" section below. Please carefully read our Terms of Service before you proceed with using any part of this website.
«Manage Settings