About this trial
A Phase Ib/III Open-label, Randomised Study of Capivasertib plus CDK4/6 Inhibitors and Fulvestrant versus CDK4/6 Inhibitors and Fulvestrant in Hormone Receptor-Positive and Human Epidermal Growth Factor Receptor 2-Negative Locally Advanced, Unresectable or Metastatic Breast Cancer (CAPItello-292)
Eligibility criteria
This trial does not accept healthy volunteersQualifiers
Adult females (pre-/peri-/ and post-menopausal), and adult males.
Histologically confirmed HR+/ HER2- breast cancer determined from the most recent tumour sample (primary or metastatic) per the American Society of Clinical Oncology and College of American Pathologists guideline. To fulfil the requirement of HR+ disease, a breast cancer must express ER with or without co-expression of progesterone receptor.
Eligible for fulvestrant therapy and at least one of the following: palbociclib, ribociclib, or abemaciclib, as per local investigator assessment. Previous tolerance to specific CDK4/6 inhibitors and dose levels required.
Adequate organ and bone marrow functions.
Disqualifiers
History of another primary malignancy except for malignancy treated with curative intent with no known active disease ≥ 2 years before the first dose of study intervention and of low potential risk for recurrence.
Radiotherapy within 2 weeks prior to study treatment initiation.
Major surgery or significant traumatic injury within 4 weeks of the first dose of study treatment.
Persistent toxicities (CTCAE Grade >1) caused by previous anticancer therapy, excluding alopecia. Participants with irreversible toxicity that is not reasonably expected to be exacerbated by study intervention may be included (eg, hearing loss or peripheral sensory neuropathy) after consultation with the AstraZeneca study physician.
Trial design
Parallel
Treatments tested in this trial
Capivasertib
DrugPhase Ib: Capivasertib 320 mg/ 400 mg administered PO BD 4 days on /3 days off per week for 4 weeks (28 days cycle) Phase III: : Capivasertib, administered PO BD 4 days on / 3 days off per week for 4 weeks (28 days cycle) at the dose confirmed in the phase Ib portion
Fulvestrant
DrugPhase Ib and Phase III: 500 mg (2 injections of 250 mg) on Day 1 of Weeks 1 and 3 of Cycle 1, and then on Day 1, Week 1 of each cycle thereafter
Palbociclib
DrugPhase Ib: 100 mg/ 125 mg. Once daily for 21 consecutive days followed by 7 days off treatment to comprise a complete 28-day cycle Phase III: Administered once daily for 21 days of 28-day cycle, at the dose of 125 mg.
Ribociclib
DrugPhase Ib: 200 mg/ 400 mg/ 600 mg. Once daily for 21 consecutive days followed by 7 days off treatment to comprise a complete 28-day cycle Phase III: Administered once daily for 21 days of 28-day cycle, at the dose confirmed in the phase 1b portion.
Abemaciclib
DrugPhase Ib: 50 mg/ 100 mg/ 150 mg. Twice daily for 28 consecutive days to comprise a complete 28-day cycle
Treatment groups
Trial outcomes
Primary outcomes
Phase Ib: 1. The number of participants with dose-limiting toxicity, as defined in the protocol.
Dose-limiting toxicity as described in the protocol that is not related to disease progression, intercurrent illness or concomitant medications and that, despite optimal therapeutic intervention, meets protocol-defined criteria.
Phase Ib: 2. The number of participants with treatment-related adverse events.
Data will include clinical observations, ECG parameters, clinical chemistry and haematology and vital signs assessed as the number of participants with treatment-related adverse events.
Phase Ib: 3. The number of participants with treatment-related serious adverse events.
Data will include clinical observations, ECG parameters, clinical chemistry and haematology and vital signs assessed as the number of participants with treatment-related adverse events.
Phase III: 1. Progression Free Survival (PFS).
Progression Free Survival (PFS) is defined as time from randomization until progression per RECIST v1.1. as assessed by BICR or death due to any cause in the overall population, the altered population, and the confirmed non-altered population. RECIST related endpoints such as PFS, ORR, DoR, CBR will be collected.
Secondary outcomes
Phase Ib: 1. PK parameters for Palbociclib, Ribociclib, Abemaciclib: Cmax.
Maximum observed plasma (peak) drug concentration.
Phase Ib: 2. PK parameters for Palbociclib, Ribociclib, Abemaciclib: AUC0-72h.
Partial area under the plasma concentration-time curve from zero to 72 hours post-dose.
Phase Ib: 3. PK parameters for Palbociclib, Ribociclib, Abemaciclib: AUC0-24h.
Partial area under the plasma concentration-time curve from zero to 24 hours post-dose.
Phase Ib: 4. PK parameters for Palbociclib, Ribociclib, Abemaciclib: Cmin.
Minimum observed plasma drug concentration.
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