Early-Phase Study to Assess Inhibitor Ribociclib in Patients With Recurrent Glioblastoma or Anaplastic Glioma
- Registration Number
- NCT02345824
- Lead Sponsor
- University of Virginia
- Brief Summary
This is a single-institution, open-label, early-phase study to assess the ability of ribociclib (LEE011) to inhibit CDK4/CDK6/Rb/E2F signaling and cell proliferation/viability in core and infiltrating tumor tissues obtained from patients with recurrent glioblastoma or anaplastic glioma compared to the baseline/primary pathologic tumor specimen. Abundant preclinical evidence indicates that Rb-deficient cancer cells are resistant to CDK4/6 inhibition and ongoing trials with CDK4/6 inhibitors exclude patients with Rb-deficient tumors. The investigators will evaluate 10 patients with Rb-positive glioblastoma or anaplastic glioma in this study. Given that a minority of glioblastomas ha Rb loss the investigators anticipate enrolling a maximum of 20 patients, to meet our goal of 10 patients with Rb-positive tumors.
- Detailed Description
Preliminary evaluation of efficacy and determination of the ribociclib safety profile in patients with brain tumors will be studied. All patients will be treated with ribociclib (600 mg/day) for 8-21 days before surgical resection of the recurrent tumor. Rb status of the recurrent tumor will be determined by immunohistochemistry within 2 weeks after surgery. Patients with Rb-positive tumors will continue treatment with ribociclib (21 days on, 7 days off) after surgery. Patients will be treated until unacceptable toxicity is observed, or until disease progression as assessed by radiographic or clinical metrics. We will determine whether molecular markers associated with changes induced by ribociclib treatment in tumors (matching initial vs. recurrent tumors) correlate with progression-free survival.
Approximately 20% of patients with recurrent high-grade glioma will undergo surgical resection of their tumor typically at the time of first recurrence. These patients will be eligible for this study. An extra 10 mL of blood will be collected during a routine clinical procedure prior to initiation of ribociclib treatment (i.e., baseline blood sample), separated into plasma and buffy coat fractions, and frozen for pharmacokinetic (PK) analysis. Patients will be treated with ribociclib for 8-21 days prior to surgery to identify drug effects on tumor cells, and to determine drug PK. The last presurgical dose of ribociclib will be administered on the day of surgery at 4-8 hours prior to surgery to allow sufficient time for the drug to enter tumor cells, inhibit CDK4/6, and modulate downstream effectors. Blood will be acquired within 1 hour before surgery (as close to the time of surgery as possible). Blood will be separated into plasma and buffy coat fractions, and frozen. During surgery, samples of brain tumor core and infiltrating brain tumor will be acquired. Tissue samples will be frozen or fixed in paraffin embedded blocks and histology for PK and molecular analyses.
Recruitment & Eligibility
- Status
- UNKNOWN
- Sex
- All
- Target Recruitment
- 3
Not provided
Not provided
Study & Design
- Study Type
- INTERVENTIONAL
- Study Design
- SINGLE_GROUP
- Arm && Interventions
Group Intervention Description Ribociclib (LEE011) Treatment Ribociclib Patients will be treated with ribociclib (LEE011) (recommended phase 2 dose of 600 mg/day) for 8-21 days prior to surgery. For preliminary evaluation of efficacy and toxicity, patients with Rb-positive tumors will resume treatment with ribociclib at 14-28 days post-surgery on a schedule of 21 days on, 7 days off in a 28-day cycle. Patients will be treated until unacceptable toxicity is observed, or until disease progression as assessed by radiographic or clinical metrics.
- Primary Outcome Measures
Name Time Method Inhibition of CDK4/CDK6 Signaling Pathway in Cell Proliferation an expected average of 1 year to allow laboratory quality assessment of tumor proliferation Levels of phospho-Rb in tumor cells, the fraction of Ki67-positive tumor cells, and the fraction of TUNEL-positive tumor cells in primary (baseline) vs. recurrent (post-LEE011) tumor samples will be assessed via laboratory practices as a means of studying Inhibition of CDK4/CDK6 Signaling Pathway in Cell Proliferation.
- Secondary Outcome Measures
Name Time Method Ribociclib Concentration in Tissues 1 Day Collection as the time of initial surgery Concentrations of ribociclib will be gathered from tumor core and infiltrating tumor tissue which is gathered at the time of initial surgery for the removal of the patients tumor.
This will be completed to assess whether ribociclib treatment induces changes in brain tumor cell fate (proliferation, apoptosis, senescence) and E2F activation. Biomarkers will be compared in ribociclib-treated recurrent tumors vs. matching baseline tumors vs. archived recurrent tumors from other patients.
Laboratory will assess the frequencies of Rb mutations and loss in primary and recurrent brain tumors.Ribociclib Concentration in Plasma time of Pharmacokinetic draws Concentrations of ribociclib in blood plasma will be gathered through pharmacokinetic draws at specified time points throughout study participation and will be used to assist in the assessment of whether ribociclib treatment induces changes in brain tumor cell fate (proliferation, apoptosis, senescence) and E2F activation. Biomarkers will be compared in ribociclib-treated recurrent tumors vs. matching baseline tumors vs. archived recurrent tumors from other patients.
To determine the frequencies of Rb mutations and loss in primary and recurrent brain tumors.Tumor Progression Over 1 year, which is expected average length of participation per patient Preliminary rates of progression-free survival in patients with high-grade gliomas treated with ribociclib will be measured through radiographic and clinical response metrics, specifically Response Assessment in Neuro-Oncology (RANO) criteria and investigator discretion.
Survival Outcomes Over 1 year, which is expected average length of participation per patient Overall survival in patients with high-grade gliomas treated with ribociclib will be assessed by medical record review and survival follow up.
Ribociclib Safety Profile 30 days post last dose of LEE011 per patient Common Toxicity Criteria Adverse Event (CTCAE 4.0) will be utilized to review ribociclib treatment effects in patients with brain tumors.
Trial Locations
- Locations (1)
University of Virginia Health System
🇺🇸Charlottesville, Virginia, United States