A Study of Abemaciclib (LY2835219) in Participants With HR+, HER2- Advanced Breast Cancer (proMONARCH)
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ClinicalTrials.gov Identifier: NCT03988114 |
Recruitment Status :
Withdrawn
(Strategic decision due to emerging new data for patients with HR+, HER2- metastatic breast cancer.)
First Posted : June 17, 2019
Last Update Posted : September 6, 2019
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Condition or disease | Intervention/treatment | Phase |
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Metastatic Breast Cancer | Drug: Abemaciclib Drug: Nonsteroidal Aromatase Inhibitor (NSAI) | Phase 4 |
Expanded Access : An investigational treatment associated with this study is available outside the clinical trial. More info ...
Study Type : | Interventional (Clinical Trial) |
Actual Enrollment : | 0 participants |
Allocation: | N/A |
Intervention Model: | Single Group Assignment |
Masking: | None (Open Label) |
Primary Purpose: | Treatment |
Official Title: | A Single-Arm, Global, Phase 4 Study of Abemaciclib, a CDK 4 & 6 Inhibitor, in Combination With Nonsteroidal Aromatase Inhibitors (Anastrozole or Letrozole) in Participants With Hormone Receptor Positive, Human Epidermal Growth Factor Receptor 2 Negative Advanced Breast Cancer With Poor Prognostic Factors |
Estimated Study Start Date : | September 16, 2019 |
Estimated Primary Completion Date : | March 23, 2022 |
Estimated Study Completion Date : | March 23, 2023 |

Arm | Intervention/treatment |
---|---|
Experimental: Abemaciclib + NSAI
Abemaciclib given orally and nonsteroidal aromatase inhibitor (NSAI) of physician's choice (anastrazole or letrozole) given orally.
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Drug: Abemaciclib
Administered orally
Other Name: LY2835219 Drug: Nonsteroidal Aromatase Inhibitor (NSAI) Letrozole administered orally or anastrozole administered orally (physician choice) |
- Progression Free Survival (PFS) [ Time Frame: Baseline to Progressive Disease or Death from Any Cause (Estimated up to 26 Months) ]PFS
- Objective Response Rate (ORR): Percentage of Participants Achieving Complete Response (CR) or Partial Response (PR) [ Time Frame: Baseline to Objective Disease Progression (Estimated up to 26 Months) ]ORR
- Duration of Response (DoR) [ Time Frame: Date of CR or PR to Date of Objective Disease Progression or Death from Any Cause (Estimated up to 26 Months) ]DoR
- Disease Control Rate (DCR): Percentage of Participants with a Best Overall Response of CR, PR, or Stable Disease (SD) [ Time Frame: Baseline to Objective Disease Progression (Estimated up to 26 Months) ]DCR
- Clinical Benefit Rate (CBR): Proportion of Participants with Best Overall Response of CR, PR, or SD with Duration of SD for at Least 6 Months [ Time Frame: Date of CR, PR or SD to 6 Months Post CR, PR or SD (Estimated up to 26 Months) ]CBR
- Time to Response (TTR) [ Time Frame: Baseline to Date of CR or PR (Estimated up to 26 Months) ]TTR

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Ages Eligible for Study: | 18 Years and older (Adult, Older Adult) |
Sexes Eligible for Study: | All |
Accepts Healthy Volunteers: | No |
Inclusion Criteria:
- Participants must have completed (neo) adjuvant endocrine therapy and have cancer return after at least 12 months or have de novo cancer that has spread to other organs at diagnosis
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Participants must have 1 or more of the following:
- A high grade tumor in tissue
- Negative progesterone receptor (PR) status
- Have cancer that has spread to the liver
- Have a treatment-free interval (TFI) <36 months
- Participants must have HR+, HER2- breast cancer
- Participants must have adequate organ function
Exclusion Criteria:
- Participants must not have cancer that has spread to other organs that has severely affected their function
- Participants must not have cancer that has spread to the brain that is unstable or untreated
- Participants must not have received endocrine therapy in the metastatic setting
- Participants must not have known active infection
- Participants must not have received prior endocrine therapy and had disease return within 12 months from completion of treatment
- Participants must not have received prior treatment with any cyclin-dependent kinase (CDK) 4 & 6 inhibitor or everolimus

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT03988114

Study Director: | Call 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 |
Responsible Party: | Eli Lilly and Company |
ClinicalTrials.gov Identifier: | NCT03988114 |
Other Study ID Numbers: |
17395 I3Y-MC-JPCX ( Other Identifier: Eli Lilly and Company ) 2019-001781-16 ( EudraCT Number ) |
First Posted: | June 17, 2019 Key Record Dates |
Last Update Posted: | September 6, 2019 |
Last Verified: | September 2019 |
Individual Participant Data (IPD) Sharing Statement: | |
Plan to Share IPD: | Yes |
Plan Description: | Anonymized individual patient level data will be provided in a secure access environment upon approval of a research proposal and a signed data sharing agreement. |
Supporting Materials: |
Study Protocol Statistical Analysis Plan (SAP) Clinical Study Report (CSR) |
Time Frame: | Data are available 6 months after the primary publication and approval of the indication studied in the US and EU, whichever is later. Data will be indefinitely available for requesting. |
Access Criteria: | A research proposal must be approved by an independent review panel and researchers must sign a data sharing agreement. |
URL: | http://www.clinicalstudydatarequest.com |
Studies a U.S. FDA-regulated Drug Product: | Yes |
Studies a U.S. FDA-regulated Device Product: | No |
Breast Neoplasms Neoplasms by Site Neoplasms Breast Diseases Skin Diseases Aromatase Inhibitors Steroid Synthesis Inhibitors |
Enzyme Inhibitors Molecular Mechanisms of Pharmacological Action Estrogen Antagonists Hormone Antagonists Hormones, Hormone Substitutes, and Hormone Antagonists Physiological Effects of Drugs |