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BI 836845 in Estrogen Receptor Positive Metastatic Breast Cancer

A Phase Ib/II Randomized Study of BI 836845 in Combination With Exemestane and Everolimus Versus Exemestane and Everolimus Alone in Women With Locally Advanced or Metastatic Breast Cancer

Status
Completed
Phases
Phase 1
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT02123823
Enrollment
164
Registered
2014-04-28
Start date
2014-05-15
Completion date
2021-12-14
Last updated
2025-07-15

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

Conditions

Neoplasms

Brief summary

Phase Ib / II study to determine the Maximum Tolerated Dose and Recommended Phase II Dose, and to evaluate the safety and antitumour activity, of BI 836845 and everolimus in combination with exemestane in women with HR+/HER2- advanced breast cancer

Interventions

DRUGEverolimus

10mg dose

DRUGExemestane

Fixed dose at 25mg

1000 mg, recommended dose per Phase Ib part. Human monoclonal antibody. Dose escalation in Phase Ib. 2 dose levels (high or low) depending on the dose cohort explored

Sponsors

Boehringer Ingelheim
Lead SponsorINDUSTRY

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
NONE

Eligibility

Sex/Gender
FEMALE
Age
18 Years to 99 Years
Healthy volunteers
No

Inclusion criteria

* Histologically-confirmed locally advanced (aBC) or metastatic breast cancer (mBC) not deemed amenable to curative surgery or curative radiation therapy * Tumors are positive for estrogen-receptor (ER) and/or progesterone receptor (PgR). * Tumors must be negative for HER2 per local lab testing. * Must have adequate archival tumor tissue from surgery or biopsy. * Postmenopausal female patients aged \>=18 years old. * Objective evidence of recurrence or progressive disease on or after the last line of systemic therapy for breast cancer prior to study entry * The patient is disease refractory to non-steroidal aromatase inhibitor (letrozole and/or anastrozole) * Patients must have: a) Measurable lesion according to RECIST version 1.1 (R09-0262) or b) Bone lesions: lytic or mixed (lytic + sclerotic) in the absence of measurable lesion as defined above * Eastern Cooperative Oncology Group performance score \<= 2. * Life expectancy of \>= 6 months in the opinion of the investigator * Fasting plasma glucose \< 8.9 mmol/L (\< 160 mg/dL) and HbA1c \< 8.0% * Adequate organ function * Recovered from any previous therapy related toxicity to \<= Grade 1 at study entry (except for stable sensory neuropathy \<=Grade 2 and alopecia) * Written informed consent that is consistent with ICH-GCP guidelines and local regulations Inclusion criteria for the biopsy substudy are identical to the main study of the phase II part except for the following two inclusion criteria: * Fresh tumor biopsy should be taken when deemed safe and feasible by the investigator and upon informed consent by the patient. Bone lesion is not recommended for biopsy * Patients eligible to undergo tumor biopsy should have normal coagulation parameters (INR and PTT within normal range)

Exclusion criteria

* Previous treatment with agents targeting on IGF pathway, phosphoinositide 3-kinase (PI3K) signaling pathway, protein kinase B (AKT), or mammalian target of rapamycin (mTOR) pathways * Prior treatment with exemestane (except adjuvant exemestane stopped \>12 months prior to start of study treatment as long as the patient did not recur during or within 12 months after the end of adjuvant exemestane) * Known hypersensitivity to monoclonal antibody, mTOR inhibitors (e.g. sirolimus), or to the excipients of any study drugs * Ovarian suppression by ovarian radiation or treatment with a luteinizing hormone-releasing hormone (LH-RH) agonist * Less than one week after receiving immunization with attenuated live vaccines prior to study treatment * Radiotherapy within 4 weeks prior to the start of the study treatment, except in case of localized radiotherapy for analgesic purpose or for lytic lesions at risk of fracture which can then be completed within two weeks prior to study treatment * Chemotherapy, biological therapy (other than bevacizumab), immunotherapy or investigational agents within 5 half-life of the drug or within two weeks prior to the start of study treatment, whichever is longer; bevacizumab treatment within 4 weeks prior to start of study treatment (this criterion concerns anti-cancer therapy only) * Hormonal treatment for breast cancer within 2 weeks prior to start of study treatment * Major surgery in the judgement of the investigator within 4 weeks before starting study treatment or scheduled for surgery during the projected course of the study * Patients receiving concomitant immunosuppressive agents or chronic corticosteroids use except Topical applications, inhaled sprays, eye drops or local injections or Patients on stable low dose of corticosteroids for at least two weeks before study entry * Chronic hepatitis B infection, chronic hepatitis C infection and/or known HIV carrier * QTcF prolongation \> 470 ms or QT prolongation deemed clinically relevant by the investigator * Disease that is considered by the investigator to be rapidly progressing or life threatening such as extensive symptomatic visceral disease including hepatic involvement and pulmonary lymphangitic spread of tumor * History or current presence of brain or other CNS metastases * Bilateral diffuse lymphangitic carcinomatosis (in lung) * Hypokalemia of Grade \>1 * History of another primary malignancy within 5 years, with the exception of adequately treated in-situ carcinoma of the cervix, uteri, basal or squamous cell carcinoma or non-melanomatous skin cancer * Family history of long QT syndrome * Any concomitant serious illness or organ system dysfunction which in the opinion of the investigator would either compromise patient safety or interfere with the evaluation of the safety and anti-tumor activity of the test drug(s) * Patients being treated with drugs recognized being strong or moderate CYP3A4 and/or PgP inhibitors and/or strong CYP3A4 inducers within 2 weeks prior to study entry * Patients received more than two lines of chemotherapy for locally advanced or metastatic breast cancer (For the Phase II: more than one line)

Design outcomes

Primary

MeasureTime frameDescription
Progression-free Survival (PFS) - Phase II PartFrom randomisation until radiological tumour progression according to RECIST 1.1, or death from any cause or data cut-off (25Nov2016), up to 30 months.Progression-free survival (PFS) in the phase II part is presented. Progression-free survival (PFS) was defined as the time from randomisation until radiological tumour progression according to RECIST 1.1, or death from any cause, whichever occurred earlier. Clinical disease progression was not considered for determination of a PFS event, unless the outcome of the progression was death. The cut-off date was 25th November 2016. At cut-off date, xentuzumab was discontinued in all patients in the experimental arm per sponsor decision, recruitment was also terminated. Patients who discontinued xentuzumab treatment continued with everolimus 10 mg + exemestane 25 mg treatment.
Number of Patients With Dose Limiting Toxicity (DLT) - Phase Ib PartFrom first administration of study treatment until end of first treatment cycle, up to 28 days.Number of patients with dose limiting toxicity (DLT) in phase Ib part is presented.
Maximum Tolerated Dose (MTD) - Phase Ib Partup to 28 days.The Maximum Tolerated Dose (MTD) in this study was defined as the highest dose level examined of trial medication, at which no more than 1 out of 6 patients experienced a DLT during the MTD evaluation period. The MTD evaluation period was defined as the time from the first administration of xentuzumab up to start of cycle 2. A 3+3 Phase Ib dose finding phase was performed to determine the MTD.

Secondary

MeasureTime frameDescription
Time to Objective Response - Phase II PartFrom randomisation until first documented complete response (CR) or partial response (PR) or data cut-off (25Nov2016), up to 30 months.Time to objective response is presented. Time to objective response is defined as the time from randomisation until first documented complete response (CR) or partial response (PR).
Number of Patients With Objective Response (OR) - Phase II PartFrom randomisation until the earliest of disease progression, death or last evaluable tumour assessment before start of subsequent anti-cancer therapy or data cut-off (25Nov2016), up to 30 months.Objective response (OR) - phase II part is presented. Objective response (OR), defined as best overall response of complete response (CR) or partial response (PR), where best overall response was determined according to RECIST 1.1 from date of randomisation until the earliest of disease progression, death or last evaluable tumour assessment before start of subsequent anti-cancer therapy.
Duration of Disease Control - Phase II PartFrom randomisation until the earliest of disease progression or death or data cut-off (25Nov2016), up to 30 months.Duration of disease control is presented. Duration of disease control is defined as the time from randomisation until the earliest of disease progression or death, among patients with disease control.
Duration of Objective Response - Phase II PartFrom randomisation until the earliest of disease progression or death or data cut-off (25Nov2016), up to 30 months.Duration of objective response is presented. Duration of objective response is defined as the time from first documented complete response (CR) or partial response (PR) until the earliest of disease progression or death among patients with objective response (OR).
Time to Progression (TTP) - Phase II PartFrom randomisation until the date of the first objective tumour progression according to RECIST 1.1. or data cut-off (25Nov2016), up to 30 months.Time to progression (TTP) is presented. Time to progression (TTP), defined as the time from the date of randomization until the date of the first objective tumour progression according to RECIST 1.1.
Number of Patients With Disease Control (DC) - Phase II PartFrom randomisation until data cut-off (25Nov2016), up to 30 months.Disease control is defined as best overall response of complete response (CR) or partial response (PR), or stable disease (SD) \>= 24 weeks, or Non-CR/Non-PD for \>= 24 weeks. PD=Progressive disease.

Countries

Austria, Belgium, France, Ireland, Netherlands, South Korea, Spain, Sweden, Taiwan, United Kingdom

Participant flow

Recruitment details

This is a phase Ib/II, randomized, open label study to determine the maximum tolerated dose (MTD) and the recommended phase II dose and to evaluate the anti-tumor activity of BI 836845 (xentuzumab) in combination with exemestane and everolimus versus exemestane and everolimus alone in women with locally advanced or metastatic breast cancer.

Pre-assignment details

Only subjects that met all inclusion + none of exclusion criteria were to be entered. Subjects were free to withdraw from clinical trial at any time for any reason given. If subject continued to take trial drug, close monitoring was adhered to + adverse events recorded. Rules were implemented in all trials whereby doses would be reduced if required. If further events were reported, subject would be withdrawn from trial. Symptomatic treatment of tumor associated symptoms were allowed throughout.

Participants by arm

ArmCount
Xentuzumab (BI 836845) 750 mg + Everolimus 10 mg + Exemestane 25 mg - Phase Ib
Subjects received a single dose of 750 milligram (mg) BI 836845 (xentuzumab) as a 1 hour (h) intravenous infusion once a week on Day 1, 8, 15 and 22 in a 28-day course until disease progression, intolerable AEs or other reason necessitating withdrawal. Subjects also received a single oral dose once daily (qd) of 2x 5 mg (10 mg total) tablets of everolimus and 1 tablet of 25 mg exemestane starting 7 days before first administration of BI 836845 (xentuzumab) continously until disease progression, intolerable AEs or other reason necessitating withdrawal.
3
Xentuzumab (BI 836845) 1000 mg + Everolimus 10 mg + Exemestane 25 mg - Phase Ib
Subjects received a single dose of 1000 milligram (mg) BI 836845 (xentuzumab) as a 1 hour (h) intravenous infusion once a week on Day 1, 8, 15 and 22 in a 28-day course until disease progression, intolerable AEs or other reason necessitating withdrawal. Subjects also received a single oral dose once daily (qd) of 2x 5 mg (10 mg total) tablets of everolimus and 1 tablet of 25 mg exemestane starting 7 days before first administration of BI 836845 (xentuzumab) continously until disease progression, intolerable AEs or other reason necessitating withdrawal.
21
Xentuzumab (BI 836845) 1000 mg + Everolimus 10 mg + Exemestane 25 mg - Phase II
Subjects received a single dose of 1000 milligram (mg) BI 836845 (xentuzumab) as a 1 hour (h) intravenous infusion once a week on Day 1, 8, 15 and 22 in a 28-day course until disease progression, intolerable AEs or other reason necessitating withdrawal. Subjects also received a single oral dose once daily (qd) of 2x 5 mg (10 mg total) tablets of everolimus and 1 tablet of 25 mg exemestane starting on Day 1 continously until disease progression, intolerable AEs or other reason necessitating withdrawal. Administration of xentuzumab was stopped after 28th October 2016, and participants in this group who remained in the trial could continue with everolimus 10 mg + exemestane 25 mg.
70
Everolimus 10 mg + Exemestane 25 mg - Phase II
Subjects received a single oral dose once daily (qd) of 2x 5 mg (10 mg total) tablets of everolimus and 1 tablet of 25 mg exemestane starting on Day 1 continously until disease progression, intolerable AEs or other reason necessitating withdrawal.
70
Total164

Withdrawals & dropouts

PeriodReasonFG000FG001FG002FG003
Overall StudyAdverse Event0035
Overall StudyLack of Efficacy02810
Overall StudyProgressive disease3195253
Overall StudyWithdrawal by Subject0072

Baseline characteristics

CharacteristicXentuzumab (BI 836845) 750 mg + Everolimus 10 mg + Exemestane 25 mg - Phase IbXentuzumab (BI 836845) 1000 mg + Everolimus 10 mg + Exemestane 25 mg - Phase IbXentuzumab (BI 836845) 1000 mg + Everolimus 10 mg + Exemestane 25 mg - Phase IIEverolimus 10 mg + Exemestane 25 mg - Phase IITotal
Age, Continuous59.00 Years
STANDARD_DEVIATION 8
64.33 Years
STANDARD_DEVIATION 7.84
60.17 Years
STANDARD_DEVIATION 9.61
60.67 Years
STANDARD_DEVIATION 9.07
60.90 Years
STANDARD_DEVIATION 9.17
Ethnicity (NIH/OMB)
Hispanic or Latino
0 Participants2 Participants1 Participants5 Participants8 Participants
Ethnicity (NIH/OMB)
Not Hispanic or Latino
3 Participants19 Participants62 Participants57 Participants141 Participants
Ethnicity (NIH/OMB)
Unknown or Not Reported
0 Participants0 Participants7 Participants8 Participants15 Participants
Race (NIH/OMB)
American Indian or Alaska Native
0 Participants0 Participants0 Participants0 Participants0 Participants
Race (NIH/OMB)
Asian
0 Participants0 Participants12 Participants12 Participants24 Participants
Race (NIH/OMB)
Black or African American
0 Participants0 Participants0 Participants0 Participants0 Participants
Race (NIH/OMB)
More than one race
0 Participants0 Participants0 Participants0 Participants0 Participants
Race (NIH/OMB)
Native Hawaiian or Other Pacific Islander
0 Participants0 Participants0 Participants0 Participants0 Participants
Race (NIH/OMB)
Unknown or Not Reported
0 Participants0 Participants5 Participants7 Participants12 Participants
Race (NIH/OMB)
White
3 Participants21 Participants53 Participants51 Participants128 Participants
Sex: Female, Male
Female
3 Participants21 Participants70 Participants70 Participants164 Participants
Sex: Female, Male
Male
0 Participants0 Participants0 Participants0 Participants0 Participants

Adverse events

Event typeEG000
affected / at risk
EG001
affected / at risk
EG002
affected / at risk
EG003
affected / at risk
deaths
Total, all-cause mortality
0 / 32 / 219 / 7011 / 69
other
Total, other adverse events
3 / 321 / 2170 / 7068 / 69
serious
Total, serious adverse events
3 / 310 / 2120 / 7029 / 69

Outcome results

Primary

Maximum Tolerated Dose (MTD) - Phase Ib Part

The Maximum Tolerated Dose (MTD) in this study was defined as the highest dose level examined of trial medication, at which no more than 1 out of 6 patients experienced a DLT during the MTD evaluation period. The MTD evaluation period was defined as the time from the first administration of xentuzumab up to start of cycle 2. A 3+3 Phase Ib dose finding phase was performed to determine the MTD.

Time frame: up to 28 days.

Population: Maximum tolerated dose (MTD) set: The MTD set defined the set of patients in the Phase Ib part who were fully evaluable for determination of the MTD in the first treatment course. Patients in the TS who were replaced within the MTD evaluation period in the first part of the trial were excluded from the determination of the MTD.

ArmMeasureValue (NUMBER)
Xentuzumab (BI 836845) 1000 mg + Everolimus 10 mg + Exemestane 25 mg - Phase IIMaximum Tolerated Dose (MTD) - Phase Ib Part1000 milligrams (mg)
Primary

Number of Patients With Dose Limiting Toxicity (DLT) - Phase Ib Part

Number of patients with dose limiting toxicity (DLT) in phase Ib part is presented.

Time frame: From first administration of study treatment until end of first treatment cycle, up to 28 days.

Population: Maximum tolerated dose (MTD) set: The MTD set defined the set of patients in the Phase Ib part who were fully evaluable for determination of the MTD in the first treatment course. Patients in the TS who were replaced within the MTD evaluation period in the first part of the trial were excluded from the determination of the MTD.

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
Xentuzumab (BI 836845) 1000 mg + Everolimus 10 mg + Exemestane 25 mg - Phase IINumber of Patients With Dose Limiting Toxicity (DLT) - Phase Ib Part0 Participants
Everolimus 10 mg + Exemestane 25 mg - Phase IINumber of Patients With Dose Limiting Toxicity (DLT) - Phase Ib Part1 Participants
Primary

Progression-free Survival (PFS) - Phase II Part

Progression-free survival (PFS) in the phase II part is presented. Progression-free survival (PFS) was defined as the time from randomisation until radiological tumour progression according to RECIST 1.1, or death from any cause, whichever occurred earlier. Clinical disease progression was not considered for determination of a PFS event, unless the outcome of the progression was death. The cut-off date was 25th November 2016. At cut-off date, xentuzumab was discontinued in all patients in the experimental arm per sponsor decision, recruitment was also terminated. Patients who discontinued xentuzumab treatment continued with everolimus 10 mg + exemestane 25 mg treatment.

Time frame: From randomisation until radiological tumour progression according to RECIST 1.1, or death from any cause or data cut-off (25Nov2016), up to 30 months.

Population: Randomised set (RS): This patient set included all randomised patients in the Phase II part, regardless of whether or not they received treatment. Patients were assigned to xentuzumab (BI 836845) in combination with exemestane and everolimus or exemestane and everolimus alone as randomised.

ArmMeasureValue (MEDIAN)
Xentuzumab (BI 836845) 1000 mg + Everolimus 10 mg + Exemestane 25 mg - Phase IIProgression-free Survival (PFS) - Phase II Part7.3 Months
Everolimus 10 mg + Exemestane 25 mg - Phase IIProgression-free Survival (PFS) - Phase II Part5.6 Months
p-value: 0.905795% CI: [0.57, 1.65]Log Rank
Secondary

Duration of Disease Control - Phase II Part

Duration of disease control is presented. Duration of disease control is defined as the time from randomisation until the earliest of disease progression or death, among patients with disease control.

Time frame: From randomisation until the earliest of disease progression or death or data cut-off (25Nov2016), up to 30 months.

Population: Randomised set (RS): This patient set included all randomised patients in the Phase II part, regardless of whether or not they received treatment. Patients were assigned to xentuzumab (BI 836845) in combination with exemestane and everolimus or exemestane and everolimus alone as randomised. Only patients with disease control were analysed.

ArmMeasureValue (MEDIAN)
Xentuzumab (BI 836845) 1000 mg + Everolimus 10 mg + Exemestane 25 mg - Phase IIDuration of Disease Control - Phase II PartNA Months
Everolimus 10 mg + Exemestane 25 mg - Phase IIDuration of Disease Control - Phase II Part9.3 Months
Secondary

Duration of Objective Response - Phase II Part

Duration of objective response is presented. Duration of objective response is defined as the time from first documented complete response (CR) or partial response (PR) until the earliest of disease progression or death among patients with objective response (OR).

Time frame: From randomisation until the earliest of disease progression or death or data cut-off (25Nov2016), up to 30 months.

Population: Randomised set (RS): This patient set included all randomised patients in the Phase II part, regardless of whether or not they received treatment. Patients were assigned to xentuzumab (BI 836845) in combination with exemestane and everolimus or exemestane and everolimus alone as randomised. Only patients with objective response were analysed.

ArmMeasureValue (MEDIAN)
Xentuzumab (BI 836845) 1000 mg + Everolimus 10 mg + Exemestane 25 mg - Phase IIDuration of Objective Response - Phase II Part5.6 Months
Everolimus 10 mg + Exemestane 25 mg - Phase IIDuration of Objective Response - Phase II PartNA Months
Secondary

Number of Patients With Disease Control (DC) - Phase II Part

Disease control is defined as best overall response of complete response (CR) or partial response (PR), or stable disease (SD) \>= 24 weeks, or Non-CR/Non-PD for \>= 24 weeks. PD=Progressive disease.

Time frame: From randomisation until data cut-off (25Nov2016), up to 30 months.

Population: Randomised set (RS): This patient set included all randomised patients in the Phase II part, regardless of whether or not they received treatment. Patients were assigned to xentuzumab (BI 836845) in combination with exemestane and everolimus or exemestane and everolimus alone as randomised.

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
Xentuzumab (BI 836845) 1000 mg + Everolimus 10 mg + Exemestane 25 mg - Phase IINumber of Patients With Disease Control (DC) - Phase II Part13 Participants
Everolimus 10 mg + Exemestane 25 mg - Phase IINumber of Patients With Disease Control (DC) - Phase II Part17 Participants
p-value: 0.400895% CI: [0.31, 1.59]Regression, Logistic
Secondary

Number of Patients With Objective Response (OR) - Phase II Part

Objective response (OR) - phase II part is presented. Objective response (OR), defined as best overall response of complete response (CR) or partial response (PR), where best overall response was determined according to RECIST 1.1 from date of randomisation until the earliest of disease progression, death or last evaluable tumour assessment before start of subsequent anti-cancer therapy.

Time frame: From randomisation until the earliest of disease progression, death or last evaluable tumour assessment before start of subsequent anti-cancer therapy or data cut-off (25Nov2016), up to 30 months.

Population: Randomised set (RS): This patient set included all randomised patients in the Phase II part, regardless of whether or not they received treatment. Patients were assigned to xentuzumab (BI 836845) in combination with exemestane and everolimus or exemestane and everolimus alone as randomised.

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
Xentuzumab (BI 836845) 1000 mg + Everolimus 10 mg + Exemestane 25 mg - Phase IINumber of Patients With Objective Response (OR) - Phase II Part5 Participants
Everolimus 10 mg + Exemestane 25 mg - Phase IINumber of Patients With Objective Response (OR) - Phase II Part7 Participants
p-value: 0.559895% CI: [0.2, 2.32]Regression, Logistic
Secondary

Time to Objective Response - Phase II Part

Time to objective response is presented. Time to objective response is defined as the time from randomisation until first documented complete response (CR) or partial response (PR).

Time frame: From randomisation until first documented complete response (CR) or partial response (PR) or data cut-off (25Nov2016), up to 30 months.

Population: Randomised set (RS): This patient set included all randomised patients in the Phase II part, regardless of whether or not they received treatment. Patients were assigned to xentuzumab (BI 836845) in combination with exemestane and everolimus or exemestane and everolimus alone as randomised. Only patients with objective response were analysed.

ArmMeasureValue (MEDIAN)
Xentuzumab (BI 836845) 1000 mg + Everolimus 10 mg + Exemestane 25 mg - Phase IITime to Objective Response - Phase II Part3.7 Months
Everolimus 10 mg + Exemestane 25 mg - Phase IITime to Objective Response - Phase II Part1.8 Months
Secondary

Time to Progression (TTP) - Phase II Part

Time to progression (TTP) is presented. Time to progression (TTP), defined as the time from the date of randomization until the date of the first objective tumour progression according to RECIST 1.1.

Time frame: From randomisation until the date of the first objective tumour progression according to RECIST 1.1. or data cut-off (25Nov2016), up to 30 months.

Population: Randomised set (RS): This patient set included all randomised patients in the Phase II part, regardless of whether or not they received treatment. Patients were assigned to xentuzumab (BI 836845) in combination with exemestane and everolimus or exemestane and everolimus alone as randomised. Only patients with progression were analysed.

ArmMeasureValue (MEDIAN)
Xentuzumab (BI 836845) 1000 mg + Everolimus 10 mg + Exemestane 25 mg - Phase IITime to Progression (TTP) - Phase II Part7.3 Months
Everolimus 10 mg + Exemestane 25 mg - Phase IITime to Progression (TTP) - Phase II Part5.6 Months
p-value: 0.914695% CI: [0.59, 1.8]Log Rank

Source: ClinicalTrials.gov · Data processed: Mar 1, 2026