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Abemaciclib Plus Darolutamide in Prostate Cancer That Has Spread After Initial Treatment

A Phase 1b Study of Abemaciclib Plus Darolutamide in Men With Metastatic Castration-Resistant Prostate Cancer

Status
Terminated
Phases
Phase 1
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT05999968
Enrollment
10
Registered
2023-08-21
Start date
2024-01-12
Completion date
2026-01-21
Last updated
2026-06-26

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Prostatic Neoplasms

Brief summary

The main purpose of this study is to learn more about the safety and tolerability of abemaciclib when given in combination with darolutamide to participants with prostate cancer that has spread after initial treatment. Participation may last up to 32 months.

Interventions

DRUGAbemaciclib

Administered orally.

DRUGDarolutamide

Administered orally.

Physician's choice. Administered in accordance with the prescribing information.

Sponsors

Eli Lilly and Company
Lead SponsorINDUSTRY
Bayer
CollaboratorINDUSTRY

Study design

Allocation
NA
Intervention model
SINGLE_GROUP
Primary purpose
TREATMENT
Masking
NONE

Eligibility

Sex/Gender
MALE
Age
18 Years to No maximum
Healthy volunteers
No

Inclusion criteria

* Histologically confirmed adenocarcinoma of the prostate. * Metastatic castration-resistant prostate cancer evidenced by: * Prostate-specific antigen (PSA) or radiographic progression despite castrate levels of testosterone * At least 1 bone metastasis on bone scan and/or 1 soft tissue metastasis on computed tomography/magnetic resonance imaging (CT/MRI) * Participants who have not undergone bilateral orchiectomy must continue luteinizing-hormone-releasing hormone (LHRH) agonists/antagonists throughout the study. * Have adequate organ function. * Eastern Cooperative Oncology Group (ECOG) performance status (PS) 0-1.

Exclusion criteria

* Prior treatment with cyclin-dependent kinase 4 and 6 (CDK4 and CDK6) inhibitors or darolutamide. * Prior systemic therapy for metastatic castration-resistant prostate cancer(mCRPC) with cytotoxic chemotherapy, PARP inhibitors, novel hormonal agents (NHAs) (enzalutamide, apalutamide, and abiraterone), and radiopharmaceuticals. * Serious preexisting medical condition(s) that, in the judgment of the investigator, would preclude participation in this study. * Clinically significant heart disease as evidenced by myocardial infarction, arterial thrombotic events, severe or unstable angina, or congestive heart failure (New York Heart Association Class III or IV) within 6 months of assignment to treatment.

Design outcomes

Primary

MeasureTime frameDescription
Number of Participants with One or More Serious Adverse Event(s) (SAEs) Considered by the Investigator to be Related to Study Drug AdministrationDate of first dose to study completion (approximately 32 months)Administration Number of Participants with One or More SAEs Considered by the Investigator to be Related to Study Drug Administration

Secondary

MeasureTime frameDescription
Radiographic Progression-Free Survival (rPFS) Assessed by Investigator rPFS Assessed by InvestigatorDate of first dose to radiographic disease progression or death from any cause (approximately 32 months)rPFS Assessed by Investigator
Objective Response Rate (ORR): Percentage of Participants with Soft Tissue Best Overall Response (BOR) of Complete Response (CR) or Partial Response (PR)Date of first dose to radiographic disease progression or death from any cause (approximately 32 months)ORR: Percentage of Participants with Soft Tissue BOR of CR or PR
Duration of Response (DoR)Date of first documented CR or PR to radiographic disease progression or death from any cause (approximately 32 months)DOR
Time to Prostate Specific Antigen (PSA) ProgressionDate of first dose to the first observation of PSA progression (approximately 32 months)Time to PSA progression
Prostate Specific Antigen (PSA) Response Rate (PSA-RR): Percentage of Participants with a PSA Decrease of at Least 50% from BaselineDate of first dose to confirmed PSA progression (approximately 32 months)PSA-RR
Pharmacokinetics (PK): Mean Concentrations of Abemaciclib and its Active Metabolite(s)Cycle 1 Day 1 until Cycle 2 Day 1 (Cycle = 28 days)PK: Mean Concentrations of Abemaciclib and its Active Metabolite(s)
Pharmacokinetics (PK): Mean Concentrations of Darolutamide and its Active MetaboliteCycle 1 Day 1 until Cycle 2 Day 1 (Cycle = 28 days)PK: Mean Concentrations of Darolutamide and its Active Metabolite

Countries

Germany, Spain, United States

Contacts

STUDY_DIRECTORCall 1-877-CTLILLY (1-877-285-4559) or 1-317-615-4559 Mon - Fri 9 AM - 5 PM Eastern time (UTC/GMT - 5 hours, EST)

Eli Lilly and Company

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Jun 27, 2026