Metastatic Breast CancerPhase 1NCT03854903
WI231696: Bosutinib, Palbocicilib and Fulvestrant for HR+HER2- Advanced Breast Cancer Refractory to a CDK4/6 Inhibitor
A Phase 1 study testing Palbociclib, Bosutinib and Fulvestrant in people with Metastatic Breast Cancer and Human Epidermal Growth Factor 2 Negative Carcinoma of Breast, run by Georgetown University at 1 site in United States.
Trial summary
This is an open-label, single-arm, phase I trial. It is designed with a conservative dose escalation plan to ensure patient's safety and with a strong translational component to inform if target inhibition is achieved. Read more about this study
- Who is it for?
- Ages 18 years and older, women only
- Conditions the study is for
- Metastatic Breast Cancer, Human Epidermal Growth Factor 2 Negative Carcinoma of Breast, Hormone Receptor Positive Breast Cancer
- What is being tested?
- Palbociclib, Bosutinib and Fulvestrant
- Type of treatment
- Pill or oral medicine, Injection or infusion
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 19 participants
- Where
- 1 siteUnited States
- Study dates
- 1 Apr 2019to 9 Jan 2025
- Phase
- Phase 1
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 years and older
- Women only
- No healthy volunteers
- Adult, Older adult
Who may be able to join
- Signed informed consent obtained prior to any study specific assessments and procedures.
- Age ≥18 years
- Premenopausal and postmenopausal women
- Biopsy proven diagnosis of ER and/or PR positive, HER2 negative, advanced breast cancer (locoregionally recurrent or metastatic disease), either from the primary or a metastatic site.
- ER, PR and HER2 measurements should be performed according to institutional guidelines, in a CLIA-approved setting.
- Breast cancer is ER-positive and/or PR-positive tumor (≥1% positive stained cells) based on local CLIA-certified laboratory results
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- HER2-negative breast cancer:
- Cut-off values for positive/negative staining should be in accordance
- A formalin-fixed paraffin-embedded (FFPE) tumor tissue block from diagnostic biopsy must be transmitted to MedStar Georgetown University Hospital Pathology Department repository and confirmation of receipt must be available prior to initiation of treatment on study.
- ECOG performance status 0-1
- Must have received no more than 3 lines of chemotherapy for the treatment of breast cancer and be progressive on at least one aromatase inhibitor and one CDK 4/6 inhibitor.
- Pregnancy must be ruled out Serum or urine pregnancy test must be negative within 14 days of treatment start in women of childbearing potential.
- Pregnancy testing does not need to be pursued in patients who are judged as postmenopausal before enrollment, or who have undergone bilateral oophorectomy, total hysterectomy, or bilateral tubal ligation.
- Patients may be considered postmenopausal in case that one of the following criteria applies (Section 5.4.1.2):
- Prior bilateral oophorectomy, OR Age ≥ 60 years, OR Age < 60 years with intact uterus and amenorrhoeic for ≥ 12 consecutive months prior to chemotherapy and/or endocrine therapy exposure, OR Age < 60 years hysterectomized and FSH and plasma estradiol levels in the post-menopausal range according to local policies prior to chemotherapy and/or endocrine therapy exposure
- Willingness to undergo adequate contraception if childbearing potential Women of childbearing potential must use adequate contraception for the duration of protocol treatment and for 3 months after the last treatment with palbociclib/bosutinib.
- Adequate contraception is defined as one highly effective form (i.e. abstinence, (fe)male sterilization) OR two effective forms (e.g. non-hormonal IUD and condom / occlusive cap with spermicidal foam / gel / film / cream / suppository).
- Patients must be able and willing to swallow and retain oral medication
- Absolute neutrophil count (ANC) ≥ 1,500/mm^3
- Platelets ≥ 100,000/mm^3
- Hemoglobin ≥ 9 g/dL
- AST and/or ALT ≤3 x ULN
- Alkaline phosphatase ≤2.5 x ULN (≤5.0 x ULN if bone metastases present)
- Total serum bilirubin ≤1.5 x ULN
- Serum creatinine within normal institutional limits or creatinine clearance ≥ 50 mL/min/1.73 m^2 for patients with serum creatinine levels above institutional ULN.
- Resolution of all acute toxic effects of prior therapy, including radiotherapy to grade ≤1 (except toxicities not considered a safety risk for the patient) and recovery from surgical procedures.
- Patients who are willing and able to comply with scheduled visits, treatment plan, laboratory tests, and other study procedures.
Who cannot join
- Concurrent therapy with other Investigational Products.
- Current use of food or drugs known to be potent inhibitors or inducers of CYP3A4
- Known hypersensitivity to fulvestrant, palbociclib or bosutinib, or to any of their excipients.
- Uncontrolled intercurrent illness including (active infection, symptomatic congestive heart failure, unstable angina pectoris, cardiac arrhythmia, diabetes, pulmonary embolism in the past 6 months, or psychiatric illness/social situations that would limit compliance with study requirements).
- Active uncontrolled or symptomatic brain metastases. Previously treated and clinically stable, as per Investigator's judgment, brain metastases are permitted.
- Unable to comply with study requirements
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- Presence of a condition that would interfere with enteric absorption of palbociclib/bosutinib.
- Pregnant women, or women of childbearing potential without a negative pregnancy test (serum or urine) within 14 days prior to starting treatment on study Breastfeeding must be discontinued prior to study entry.
- Patients on combination antiretroviral therapy, i.e. those who are HIV-positive (potential for pharmacokinetic interactions or increased immunosuppression with palbociclib).
- Patients with clinically significant history of liver disease, including viral or other known hepatitis, current alcohol abuse, or cirrhosis, etc.
- Patients on chronic anticoagulation (fulvestrant is IM injection)
Trial locations and contacts
1 site in 1 country.
United States1 site
Lombardi Comprehensive Cancer Center
Washington D.C., District of Columbia, 20007
About this study
Official title: A Phase I Trial of Palbociclib and Bosutinib With Fulvestrant in Patients With Metastatic Hormone Receptor Positive and HER2 Negative (HR+ HER2-) Breast Cancer Refractory to an Aromatase Inhibitor and a CDK4/6 Inhibitor (ASPIRE - WI231696)
This is an open-label, single-arm, phase I trial. It is designed with a conservative dose escalation plan to ensure patient's safety and with a strong translational component to inform if target inhibition is achieved. With concerns regarding safety, based on extensive available pharmacokinetic data and clinical efficacy experience, bosutinib will be given 5-days in a row followed by 2 days rest in a weekly basis, instead of daily.
The protocol will enroll patients per 3+3 escalation design. The Dose Limiting Toxicity (DLT) observation period is 28 days. At the end of DLT observation period of each cohort of 3 patients, decision will be made regarding further escalation or de-escalation according to this plan. Once the MTD of the combination is reached, the safety data will be analyzed. There will be no dose reductions during DLT observation period. Dose reduction within patients (individually) is allowed after the 4-week DLT observation period. Treatment in this phase I trial will be administered until there is disease progression or unacceptable toxicity.
- Conditions
- Metastatic Breast Cancer, Human Epidermal Growth Factor 2 Negative Carcinoma of Breast, Hormone Receptor Positive Breast Cancer
- Being tested
- Palbociclib, Bosutinib, Fulvestrant
- Keywords
- breast cancer, HR+, HER2-, HR positive, HER2 negative, metastatic, aromatase inhibitor, CDK4/6 inhibitor, palbociclib, bosutinib, fulvestrant, Faslodex
- Medical subject headings
- Breast Neoplasms, Neoplasm Metastasis
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
PalbociclibDrug
Also called Ibrance
Palbociclib is taken orally.
BosutinibDrug
Also called Bosulif
Bosutinib is taken orally.
FulvestrantDrug
Also called Faslodex
Fulvestrant is given as an intramuscular injection.
| Study group | Role | What they receive |
|---|---|---|
| Dose Level A1 | Experimental | * Palbociclib: 75mg daily for 21 days of each 28 day cycle
* Bosutinib: 300mg on days 1-5 of each week of the 28 day cycle
* Fulvestrant: 500mg on days day 1, 5, and 28 of each 28 day cycle Receives: Drug: Palbociclib; Drug: Bosutinib; Drug: Fulvestrant |
| Dose Level A2 | Experimental | * Palbociclib: 75mg daily for the first 21 days of each 28 day cycle
* Bosutinib: 300mg on days 1-5 of each week of the 28 day cycle Receives: Drug: Palbociclib; Drug: Bosutinib |
| Dose Level B1 | Experimental | * Palbociclib: 100mg daily for 21 days of each 28 day cycle
* Bosutinib: 300mg on days 1-5 of each week of the 28 day cycle
* Fulvestrant: 500mg on days day 1, 5, and 28 of each 28 day cycle Receives: Drug: Palbociclib; Drug: Bosutinib; Drug: Fulvestrant |
| Dose Level B2 | Experimental | * Palbociclib: 100mg daily for 21 days of each 28 day cycle
* Bosutinib: 500mg on days 1-5 of each week of the 28 day cycle
* Fulvestrant: 500mg on days day 1, 5, and 28 of each 28 day cycle Receives: Drug: Palbociclib; Drug: Bosutinib; Drug: Fulvestrant |
What is being measured
The primary outcome is the main question the study is designed to answer.
Toxicity of bosutinib when used in combination with palbociclib and fulvestrant in patients with advanced HR+MBC who are refractory to AI and CDK4/6 inhibitors
Toxicity of adverse events will be measured via the Common Toxicity Criteria for Adverse Events (CTCAE 4.03)
Measured: 1 year
Incidence of adverse events of bosutinib when used in combination with palbociclib and fulvestrant in patients with advanced HR+MBC who are refractory to AI and CDK4/6 inhibitors
Incidence of adverse events will be measured via the Common Toxicity Criteria for Adverse Events (CTCAE 4.03)
Measured: 1 year
Grade of adverse events of bosutinib when used in combination with palbociclib and fulvestrant in patients with advanced HR+MBC who are refractory to AI and CDK4/6 inhibitors
Grade of adverse events will be measured via the Common Toxicity Criteria for Adverse Events (CTCAE 4.03)
Measured: 1 year
Maximum Tolerated Doses (MTD) of palbociclib and bosutinib when used in combination with fulvestrant in patients with advanced HR+MBC who are refractory to AI and CDK4/6 inhibitors
This is a 3+3 escalation phase I study. Three patients will be enrolled at each dose cohort and an evaluation of dose escalation will take place after 3 patients have completed 28 days of therapy. If none of the 3 patients has a dose-limiting toxicity, the next cohort will be treated at the next dose level as per the dose escalation schema. At each dose level, if one patient experiences a dose-limiting toxicity, an additional 3 patients will be enrolled. If 2 or more patients experience dose-limiting toxicity in a single cohort (either 2/3 patients, or 2/6 patients in an expanded cohort), the MTD will have been exceeded and dose escalation will stop.
Measured: 28 days of therapy
Recommended Phase II Dose (RP2D) of palbociclib and bosutinib when used in combination with fulvestrant in patients with advanced HR+MBC who are refractory to AI and CDK4/6 inhibitors
Once the MTD of the combination is reached, the safety data will be analyzed. Dose reduction within patients (individually) is allowed after the 4-week DLT observation period. This phase I trial will inform the RP2D (recommended phase 2 doses of the drugs on the combination).
Measured: 1 year
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted26 Feb 2019
- Study start1 Apr 2019
- Primary completion1 Nov 2023
- Study completion9 Jan 2025
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Metastatic Breast CancerStudies of the same condition, open and under way.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase 1
- Primary purpose
- Treatment
- Allocation
- Non-randomised
- Intervention model
- Sequential
- Masking
- None (open label)
- Enrolment
- 19 participants (actual)
Sponsor and investigators
- Lead sponsor
- Georgetown University
- Sponsor type
- University, hospital or other
- Collaborators
- Pfizer
- Responsible party
- Sponsor
- Investigators
- Claudine Isaacs, MD, Principal investigator, Georgetown University
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT03854903
- Sponsor's protocol ID
- STUDY00000057
- Status last verified
- Feb 2025
- First submitted
- 21 Feb 2019
- Last updated
- 6 Feb 2025
- Results posted
- No
- Data monitoring committee
- Yes
- FDA-regulated drug
- Yes
- FDA-regulated device
- No