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Clinical Trial Details

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Molecule overview Clinical trials

Other or Multiple Cancer Types

Palbociclib

PHASE 1/2 STUDY TO EVALUATE PALBOCICLIB (IBRANCE®) IN COMBINATION WITH IRINOTECAN AND TEMOZOLOMIDE OR IN COMBINATION WITH TOPOTECAN AND CYCLOPHOSPHAMIDE IN PEDIATRIC PATIENTS WITH RECURRENT OR REFRACTORY SOLID TUMORS

Phase 2

NCT03709680

Active Not-enrolling

Locations

United States, Brazil, Canada, Czechia, France, Germany, India, Korea, Republic of, Poland, Slovakia, Spain, Sweden, Turkey, United Kingdom

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Study design Key eligibility criteria Key dates Key endpoints Number of participants Collaborators and investigators

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Study design

Participant Group/Arm

EXPERIMENTAL: Phase 2 Arm A

Palbociclib in combination with irinotecan and temozolomide.

Intervention/Treatment

DRUG: Palbociclib

Phase 1: Administered (oral) at 55 mg/m2, 75 mg/m2, or 40 mg/m2, or 95 mg/m2 or 115 mg/m2 on days 1-14 of a 21-day cycle Phase 1 Tumor specific cohort-Neuroblastoma and Phase 2 : Administered (oral) at 75 mg/m2 on days 1-14 of a 21-day cycle

DRUG: Temozolomide

Phase 1 and Phase 2: Administered at 100 mg/m2 (oral or intravenous), on days 1-5 of a 21-day cycle

DRUG: Irinotecan

Phase 1 and Phase 2: Administered at 50 mg/m2 (intravenous), on days 1-5 of a 21-day cycle

Participant Group/Arm

EXPERIMENTAL: Phase 1

Palbociclib in combination with temozolomide and irinotecan and/or with topotecan and cyclophosphamide.

Intervention/Treatment

DRUG: Palbociclib

DRUG: Temozolomide

Phase 1 and Phase 2: Administered at 100 mg/m2 (oral or intravenous), on days 1-5 of a 21-day cycle

DRUG: Irinotecan

Phase 1 and Phase 2: Administered at 50 mg/m2 (intravenous), on days 1-5 of a 21-day cycle

DRUG: Topotecan

Phase 1 only : Administered at 0.75 mg/m2 (intravenous), on days 1-5 of a 21-day cycle

DRUG: Cyclophosphamide

Phase 1 only: Administered at 250 mg/m2 (intravenous), on days 1-5 of a 21-day cycle

Participant Group/Arm

ACTIVE_COMPARATOR: Phase 2 Arm B

Irinotecan and temozolomide alone.

Intervention/Treatment

DRUG: Temozolomide

Phase 1 and Phase 2: Administered at 100 mg/m2 (oral or intravenous), on days 1-5 of a 21-day cycle

DRUG: Irinotecan

Phase 1 and Phase 2: Administered at 50 mg/m2 (intravenous), on days 1-5 of a 21-day cycle

Participant Group/Arm

EXPERIMENTAL: Phase 1 Tumor specific cohort - Neuroblastoma

Palbociclib in combination with topotecan and cyclophosphamide.

Intervention/Treatment

DRUG: Palbociclib

DRUG: Topotecan

Phase 1 only : Administered at 0.75 mg/m2 (intravenous), on days 1-5 of a 21-day cycle

DRUG: Cyclophosphamide

Phase 1 only: Administered at 250 mg/m2 (intravenous), on days 1-5 of a 21-day cycle

Study design table for Clinical Trial

Key eligibility criteria

Inclusion criteria

Inclusion: 1. Histologically confirmed relapsed or refractory solid tumor as follows: * For dose escalation and dose determination parts: Histologically confirmed relapsed or refractory solid tumor (including CNS tumors but not lymphomas). Patients with Diffuse Intrinsic Pontine Glioma do not require histological only radiographic confirmed relapse to enroll. * For dose expansion and tumor specific cohorts: Histologically confirmed relapsed or refractory solid tumor including but not limited to EWS, rhabdoid tumor, rhabdomyosarcoma, neuroblastoma, and medulloblastoma. Patients with Diffuse Intrinsic Pontine Glioma do not require histological only radiographic confirmed relapse to enroll. EWS is not eligible for TOPO and CTX tumor-specific cohorts. * For randomized Phase 2 part: Histologically confirmed Ewing sarcoma at diagnosis or at relapse, with presence of EWSR1-ETS or FUS-ETS rearrangement. Histopathology confirmation of both EWSR1-ETS or FUS-ETS rearrangement partners is required OR availability of formalin fixed paraffin embedded (FFPE) tumor tissue sample for central testing. Patient must have relapsed or have refractory disease and at least evaluable disease in at least one site other than bone marrow that can be followed by imaging. 2. Age ≥2 and \<21 years at the time of study entry. 3. Lansky performance status ≥50% for patients ≤16 years of age, or Eastern Cooperative Oncology Group (ECOG) 0, 1 or 2 for patients \>16 years of age. 4. Adequate bone marrow function. * Absolute neutrophil count ≥1000/mm3; * Platelet count ≥75,000/mm3 (transfusion independent, no platelet transfusion in past 7 days prior study entry); * Hemoglobin ≥8.5 g/dL (transfusion allowed). 5. Adequate renal function: Serum creatinine level based on age/gender must within protocol specified limits. 6. Adequate liver function, including: * Aspartate aminotransferase (AST) and alanine aminotransferase (ALT) ≤2.5 × upper limit of normal (ULN) or ≤5 × ULN for age, if attributable to disease involvement of the liver; * Total bilirubin ≤1.5 × ULN for age, unless the patient has documented Gilbert's syndrome.Patients with documented Gilbert's syndrome are eligible if direct bilirubin is within normal ranges (≤ULN). 7. Patients enrolled to Phase 1 portion of the study and tumor specific cohorts must have measurable disease as defined by RECIST version 1.1 or modified RANO criteria for CNS disease or at least evaluable disease by INRC for neuroblastoma. The eligible patients with neuroblastoma must have at least one of the following at the time of study entry: * Measurable tumor by CT or MRI that is avid on MIBG scan or demonstrates increased FDG uptake on PET scan; * Avid lesion on MIBG scan with positive uptake at a minimum of one site; * For disease that is not avid by MIBG-scan, at least one lesion that demonstrates increased FDG uptake on PET scan AND viable neuroblastoma confirmed by current or prior biopsy; * bone marrow involvement with more than 5% neuroblastoma cells in at least one sample from bilateral bone marrow biopsies; * In non MIBG-avid refractory soft tissue disease that does not demonstrate increased FDG uptake; lesion biopsy is required to document the presence of viable neuroblastoma, unless patient has a new soft tissue lesion (radiographic evidence of disease progression). Patients with EWS enrolled to Phase 2 portion of the study are eligible with evaluable disease (eg, bone only disease with no soft tissue component). 8. Recovered to CTCAE Grade ≤1, or to baseline, from any non-hematological acute toxicities of prior surgery, chemotherapy, immunotherapy, radiotherapy, differentiation therapy or biologic therapy, with the exception of alopecia. 9. Serum/urine pregnancy test (for all girls ≥8 years of age) negative at screening and at the baseline visit. Exclusion: 1. Phase 1 and tumor specific cohorts: For palbociclib with IRN and TMZ combination, prior treatment with a CDK4/6 inhibitor or progression while on treatment with an IRN-containing regimen that includes TMZ. Patients who have received the combination of IRN and TMZ and did not progress while on these medications are eligible. For patients enrolling in the palbociclib with TOPO and CTX combination, prior treatment with a CDK4/6 inhibitor or progression while on treatment with a TOPO-containing regimen that includes CTX. Patients who have received the combination of TOPO and CTX and did not progress while on these medications are eligible. Phase 2 portion: prior treatment with a CDK4/6 inhibitor or progression while on treatment with an IRN-containing or TMZ-containing regimen. Patients who have received IRN and/or TMZ and did not progress while on these medications are eligible. 2. Prior intolerability to IRN and/or TMZ plus/minus palbociclib with IRN and TMZ combination and prior intolerability to TOPO and/or CTX for TOPO and CTX combination. For patients enrolled in the UK, any contraindication for IRN and/or TMZ treatment, as per the local SmPC. 3. Use of strong cytochrome P450 (CYP) 3A inhibitors or inducers within 12 days of study entry. Patients who are receiving strong uridine diphosphate-glucuronosyl transferase 1A1 (UGT1A1) inhibitors within 12 days of Cycle 1 Day 1 (C1D1) are not eligible for the palbociclib with IRN and TMZ combination. Patients who are receiving strong UGT1A1 inhibitors within 12 days of C1D1 are eligible for the palbociclib with TOPO and CTX combination (See Section 5.7.1 for list of products.) 4. Systemic anti cancer therapy within 2 weeks prior to study entry and 6 weeks for nitrosoureas. 5. Prior irradiation to \>50% of the bone marrow (see Appendix 9). 6. Participation in other studies involving investigational drug(s) within 2 weeks or 5 half lives, whichever is longer, prior to study entry. 7. Major surgery within 4 weeks prior to study entry. Surgical biopsies or central line placement are not considered major surgeries. 8. For IRN and TMZ with/without palbociclib combinations: known or suspected hypersensitivity to palbociclib, dacarbazine, IRN and/or TMZ. For combination of palbociclib with TOPO and CTX: known or suspected hypersensitivity to palbociclib, TOPO and/or CTX. 9. Patients with known symptomatic brain tumors or brain metastases and require steroids, unless they have been on a stable or on a decreasing steroid dose for \>14 days. 10. Patients with previously diagnosed brain metastases are eligible if they have completed their prior treatment and have recovered from the acute effects of radiation therapy or surgery prior to study entry for these metastases for at least 14 days post radiation and 4 weeks post-surgery and are neurologically stable. 11. Hereditary bone marrow failure disorder. 12. QTc \>470 msec. 13. History of clinically significant or uncontrolled cardiac disease, including: * History of or active congestive heart failure; if patient had congestive heart failure resolve and \>1 year from resolution, patient will be considered eligible; * Clinically significant ventricular arrhythmia (such as ventricular tachycardia, ventricular fibrillation or Torsades de Pointes); * Diagnosed or suspected congenital or acquired prolonged QT syndrome; * Need for medications known to prolong the QT interval; * Uncorrected hypomagnesemia or hypokalemia because of potential effects on the QT interval; * Left ventricular ejection fraction \<50% or shortening fraction \<28%. 14. Recent or ongoing clinically significant gastrointestinal disorder that may interfere with absorption of orally administered drugs (eg, gastrectomy). 15. Evidence of serious active or uncontrolled bacterial, fungal or viral infection or known history of hepatitis B virus, hepatitis C virus, or human immunodeficiency virus infection or acquired immunodeficiency syndrome-related illness. Screening for viral hepatitis and HIV is under discretion of investigator unless required by local regulation. 16. Severe acute or chronic medical or laboratory test abnormality that may increase the risk associated with study participation or investigational product administration or may interfere with the interpretation of study results, and in the judgment of the Investigator, would make the patient inappropriate for entry into this study. 17. Investigator site staff members directly involved in the conduct of the study and their family members, site staff members otherwise supervised by the investigator, or patients who are Pfizer employees, including their family members, directly involved in the conduct of the study. 18. Fertile male patients or female patients of childbearing potential who are unwilling or unable to follow contraceptive requirements. 19. Pregnant or breastfeeding women.

Exclusion criteria

Exclusion:

Phase 1 and tumor specific cohorts: For palbociclib with IRN and TMZ combination, prior treatment with a CDK4/6 inhibitor or progression while on treatment with an IRN-containing regimen that includes TMZ. Patients who have received the combination of IRN and TMZ and did not progress while on these medications are eligible. For patients enrolling in the palbociclib with TOPO and CTX combination, prior treatment with a CDK4/6 inhibitor or progression while on treatment with a TOPO-containing regimen that includes CTX. Patients who have received the combination of TOPO and CTX and did not progress while on these medications are eligible. Phase 2 portion: prior treatment with a CDK4/6 inhibitor or progression while on treatment with an IRN-containing or TMZ-containing regimen. Patients who have received IRN and/or TMZ and did not progress while on these medications are eligible.
Prior intolerability to IRN and/or TMZ plus/minus palbociclib with IRN and TMZ combination and prior intolerability to TOPO and/or CTX for TOPO and CTX combination. For patients enrolled in the UK, any contraindication for IRN and/or TMZ treatment, as per the local SmPC.
Use of strong cytochrome P450 (CYP) 3A inhibitors or inducers within 12 days of study entry. Patients who are receiving strong uridine diphosphate-glucuronosyl transferase 1A1 (UGT1A1) inhibitors within 12 days of Cycle 1 Day 1 (C1D1) are not eligible for the palbociclib with IRN and TMZ combination. Patients who are receiving strong UGT1A1 inhibitors within 12 days of C1D1 are eligible for the palbociclib with TOPO and CTX combination (See Section 5.7.1 for list of products.)
Systemic anti cancer therapy within 2 weeks prior to study entry and 6 weeks for nitrosoureas.
Prior irradiation to >50% of the bone marrow (see Appendix 9).
Participation in other studies involving investigational drug(s) within 2 weeks or 5 half lives, whichever is longer, prior to study entry.
Major surgery within 4 weeks prior to study entry. Surgical biopsies or central line placement are not considered major surgeries.
For IRN and TMZ with/without palbociclib combinations: known or suspected hypersensitivity to palbociclib, dacarbazine, IRN and/or TMZ. For combination of palbociclib with TOPO and CTX: known or suspected hypersensitivity to palbociclib, TOPO and/or CTX.
Patients with known symptomatic brain tumors or brain metastases and require steroids, unless they have been on a stable or on a decreasing steroid dose for >14 days.
Patients with previously diagnosed brain metastases are eligible if they have completed their prior treatment and have recovered from the acute effects of radiation therapy or surgery prior to study entry for these metastases for at least 14 days post radiation and 4 weeks post-surgery and are neurologically stable.
Hereditary bone marrow failure disorder.
QTc >470 msec.
History of clinically significant or uncontrolled cardiac disease, including:
- History of or active congestive heart failure; if patient had congestive heart failure resolve and >1 year from resolution, patient will be considered eligible;
- Clinically significant ventricular arrhythmia (such as ventricular tachycardia, ventricular fibrillation or Torsades de Pointes);
- Diagnosed or suspected congenital or acquired prolonged QT syndrome;
- Need for medications known to prolong the QT interval;
- Uncorrected hypomagnesemia or hypokalemia because of potential effects on the QT interval;
- Left ventricular ejection fraction <50% or shortening fraction <28%.
Recent or ongoing clinically significant gastrointestinal disorder that may interfere with absorption of orally administered drugs (eg, gastrectomy).
Evidence of serious active or uncontrolled bacterial, fungal or viral infection or known history of hepatitis B virus, hepatitis C virus, or human immunodeficiency virus infection or acquired immunodeficiency syndrome-related illness. Screening for viral hepatitis and HIV is under discretion of investigator unless required by local regulation.
Severe acute or chronic medical or laboratory test abnormality that may increase the risk associated with study participation or investigational product administration or may interfere with the interpretation of study results, and in the judgment of the Investigator, would make the patient inappropriate for entry into this study.
Investigator site staff members directly involved in the conduct of the study and their family members, site staff members otherwise supervised by the investigator, or patients who are Pfizer employees, including their family members, directly involved in the conduct of the study.
Fertile male patients or female patients of childbearing potential who are unwilling or unable to follow contraceptive requirements.
Pregnant or breastfeeding women.

Key dates

Study start date

May 2019

Estimated Study Completion Date

October 2025

Key endpoints

Primary Outcome Measures

Outcome Measure

Phase 2 open-label, randomized: Event-free survival (EFS) based on Investigator assessment.

Measure Description

EFS is defined as the time from randomization until first event (ie, progression, recurrence following response, second malignancy or death without progression or recurrence).

Time Frame

Baseline to Month 24.

Outcome Measure

Phase 1: First Cycle Dose-Limiting Toxicities (DLT)

Measure Description

For Dose Escalation/Determination Part: DLT defined as any of the following events occurring during the first treatment cycle and considered at least possibly-related to study medication:Grade 4 neutropenia lasting greater than 7 days;Grade 4 thrombocytopenia lasting greater than 7 days or need for platelet transfusion for a platelet count of \< 20,000 per cubic millimeters twice within a 7-day period;greater than 14-day delay in the start of a subsequent course because of neutropenia or thrombocytopenia;Grade 3 or greater non-hematologic toxicities despite optimal treatment;any Grade 2 or greater non-hematologic toxicity requiring discontinuation or interruption of palbociclib for 7 or more consecutive days during the first cycle or any grade non-hematologic toxicity that delays the start of Cycle 2 by more than 14 days;clinically significant non-hematologic laboratory test abnormality Grade 3 or greater not resolving to Grade 1 or baseline within 7 days.

Time Frame

First cycle (cycle length is approximately 21 days)

Outcome Measure

Phase 1: Dose Expansion Parts: Frequency of adverse events

Measure Description

For Dose Expansion and Tumor-Specific Expansion Parts: Adverse events to be reported during treatment and for at least 28 days after last dose.

Time Frame

At least 28 days after last dose

Outcome Measure

Phase 1: Dose Expansion Parts: Percentage of Participants With Complete Response or Partial Response

Measure Description

For Dose Expansion and Tumor-Specific Expansion Parts: patients with confirmed Complete Response or Partial Response per Response Evaluation Criteria in Solid Tumors (RECIST, v.1.1) or modified Response Assessment in Neuro-Oncology (RANO) for central nervous system malignancies, or International Neuroblastoma Response Criteria (INRC) for neuroblastoma, during study treatment, assessed approximately every 2 to 4 cycles (each cycle is approximately 21 days).

Time Frame

Through the end of treatment (up to at least 28 days after last dose)

Primary Outcome Measures table for Clinical Trial

Secondary Outcome Measures:

Outcome Measure

Phase 1 and Phase 2: Frequency of adverse events

Measure Description

Adverse events to be reported during treatment and for at least 28 days after last dose.

Time Frame

At least 28 days after last dose

Outcome Measure

Phase 1 and Phase 2: Percentage of participants with laboratory abnormalities

Measure Description

Magnesium, Calcium, Creatinine, Albumin, Alanine aminotransferase, Aspartate aminotransferase, Glucose, Phosphorus, Total Bilirubin, Blood urea nitrogen, Alkaline phosphatase, Sodium, Potassium, Chloride, Platelet Count, White Blood Cell Count (differential), hemoglobin, INR or prothrombin Time, HbA1c

Time Frame

At least 28 days after last dose

Outcome Measure

Phase 1 and Phase 2: Number of Participants With Clinically Significant Treatment-emergent Electrocardiogram (ECG) Findings

Measure Description

Clinically significant ECG findings included: corrected QT (QTc) \> 450 ms, QTc \>500 ms, change in QTc between 30 and 60 ms, change in QTc greater than or equal to 60 ms.

Time Frame

At least 28 days after last dose

Outcome Measure

Phase 1 and Phase 2: Number of Participants With Clinically Significant Change From Baseline in Vital Signs

Measure Description

systolic and diastolic blood pressure, pulse

Time Frame

At least 28 days after last dose

Outcome Measure

Phase 2 open-label, randomized: Event-free survival (EFS) assessed by an independent review committee.

Measure Description

EFS is defined as the time from randomization until first event (ie, progression, recurrence following response, second malignancy or death without progression or recurrence).

Time Frame

Baseline to Month 24.

Outcome Measure

Phase 1 and Phase 2: Percentage of Participants With Complete Response or Partial Response

Measure Description

Patients with confirmed Complete Response or Partial Response per Response Evaluation Criteria in Solid Tumors (RECIST, v.1.1) or modified Response Assessment in Neuro-Oncology (RANO) for central nervous system malignancies, or International Neuroblastoma Response Criteria (INRC) for neuroblastoma, during study treatment, assessed approximately every 2 to 4 cycles (each cycle is approximately 21 days).

Time Frame

Through the end of treatment (up to at least 28 days after last dose)

Outcome Measure

Phase 1 and Phase 2: Duration of response (DoR) for Participants Who Achieved Complete Response or Partial Response

Measure Description

DoR defined as time from date of first response (Complete Response or Partial Response) in responders to date of progression or death

Time Frame

Up to 2 years

Outcome Measure

Phase 1 and Phase 2: Progression Free Survival (PFS)

Measure Description

PFS defined as time from date of enrollment to earliest date of the death or progressive disease

Time Frame

Up to 2 years

Outcome Measure

Phase 1 and Phase 2: Overall Survival (OS)

Measure Description

OS defined as the time from enrollment to date of death due to any cause.

Time Frame

Up to 2 years

Outcome Measure

Phase 2 : comparison of PET-CT response assessment to objective response on CT/MRI.

Measure Description

PET-CT response assessment will be compared to objective response on MRI/CT, as data permit.

Time Frame

up to completion of Cycle 4 ( 12 weeks of therapy)

Outcome Measure

Phase 2: the impact of the combination of palbociclib with TMZ and IRN treatment on the quality of life (QoL) of patients with refractory or recurrent EWS.

Measure Description

Results of QoL reported by patient at baseline and after 2 and 4 cycles using age-appropriate PROMIS tools will be summarized for both treatment arms, as data permit. Days of hospitalization will be compared in both treatment arms.

Time Frame

Up to Cycle 5 (completion of 12 weeks of treatment)

Outcome Measure

Phase 1 and Phase 2:Palbociclib Pharmacokinetics, Maximum observed plasma concentration during a dosing interval at steady state (Css, max)