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A Study of LY3295668 Erbumine in Participants With Breast Cancer That Has Spread to Other Parts of the Body

A Phase 1b Study of Aurora A Kinase Inhibitor LY3295668 Erbumine in Monotherapy and Combination Therapy in Patients With Metastatic Breast Cancer Post CDK4/6 Inhibitor and Endocrine Therapy

Status
Completed
Phases
Phase 1
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT03955939
Enrollment
5
Registered
2019-05-20
Start date
2019-08-02
Completion date
2020-05-14
Last updated
2020-06-01

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

Conditions

Metastatic Breast Cancer

Keywords

aurora kinase A, kinase, aurora A, aurora kinase inhibitor, aurora kinase A inhibitor, kinase inhibitor, AURKA, AurA

Brief summary

The reason for this study is to determine the recommended phase 2 dose of the study drug LY3295668 erbumine in participants with breast cancer that has spread to other parts of the body.

Interventions

Administered orally.

DRUGEndocrine therapy

Administered according to label instructions.

DRUGMidazolam

Administered orally.

Sponsors

Eli Lilly and Company
Lead SponsorINDUSTRY

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
NONE

Eligibility

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

Inclusion criteria

* Participant must have hormone receptor positive and HER2 negative metastatic breast cancer * Participant must have progressed on at least 1 line of endocrine therapy and 1 cyclin dependent kinase (CDK)4/6 inhibitor * Participant must be able and willing to undergo mandatory tumor biopsy * Participant must have normal organ function * Participant must be able to swallow capsules

Exclusion criteria

* Participant must not have had prior chemotherapy for mBC. Chemotherapy in the adjuvant/neoadjuvant setting is permitted * Participant must not be currently enrolled in a clinical study * Participant must not have another serious medical condition * Participant must not have previously received an aurora kinase inhibitor

Design outcomes

Primary

MeasureTime frameDescription
Number of Participants with Dose ReductionsBaseline through Cycle 1 (28 Day Cycle)Number of Participants with Dose Reductions
Part II: Number of Participants with Dose Limiting Toxicities (DLTs)Baseline through Cycle 1 (28 Day Cycle)Part II: Number of Participants with DLTs
Overall Response Rate (ORR): Percentage of Participants Who Achieve Complete Response (CR) or Partial Response (PR)Baseline through Measured Progressive Disease (Estimated up to 23 Months)ORR
Duration of Response (DoR)Date of CR or PR to Date of Disease Progression or Death Due to Any Cause (Estimated up to 23 Months)DoR

Secondary

MeasureTime frameDescription
PK: AUC of Endocrine Therapy in Combination with LY3295668Predose Cycle 1 Day 1 through Cycle 2 Day 1 (28 Day Cycles)PK: AUC of Endocrine Therapy in Combination with LY3295668
Clinical Benefit Rate (CBR): Percentage of Participants Who Achieve CR, PR or SD With a Duration of At Least 6 MonthsBaseline through Disease Progression or Death Due to Any Cause (Estimated up to 23 Months)CBR
PK: AUC of Midazolam in Combination with LY3295668Predose Cycle 1 Day 1 through Cycle 2 Day 1 (28 Day Cycles)PK: AUC of Midazolam in Combination with LY3295668
PK: AUC of MidazolamPredose Cycle 1 Day 1 through Cycle 2 Day 1 (28 Day Cycles)PK: AUC of Midazolam
Progression-Free Survival (PFS)Baseline to Objective Progression or Death Due to Any Cause (Estimated up to 23 Months)PFS
Pharmacokinetics (PK): Area Under the Concentration Time Curve (AUC) of LY3295668Predose Cycle 1 Day 1 through Cycle 2 Day 1 (28 Day Cycles)PK: AUC of LY3295668
PK: AUC of LY3295668 in Combination with Endocrine TherapyPredose Cycle 1 Day 1 through Cycle 2 Day 1 (28 Day Cycles)PK: AUC of LY3295668 in Combination with Endocrine Therapy

Countries

Belgium, United States

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 8, 2026