The phase I part of the study is a dose-finding study of escalating doses of CBP501 combined with full-dose cisplatin and pemetrexed in patients with histologically confirmed solid malignancy that is metastatic or unresectable and for which standard curative or palliative measures do not exist or are no longer effective or would otherwise be eligible for cisplatin and pemetrexed as first-line therapy. The maximum tolerated dose (MTD) will be determined based on DLTs occurring during the first treatment cycle. Pharmacokinetics of the triplet combination will be assessed during the phase I part of the trial. The phase II part will evaluate full-dose cisplatin and pemetrexed combined with CBP501 (at the MTD determined in the phase I part) in previously untreated, unresectable malignant pleural mesothelioma patients. Patients will be randomized in a 2 : 1 ratio to pemetrexed, cisplatin and CBP501 (Arm A) or to pemetrexed and cisplatin (Arm B); randomization will be stratified according to histology and performance status.
This is an open-label, multicenter, international, phase I-II study. The phase I part, a dose-finding study of escalating doses of CBP501 combined with fixed full-dose cisplatin and pemetrexed, has been completed and results are presented in this report. MTD was determined on DLT occurring during the first cycle. This phase I part was evaluated in a patient population with advanced solid tumors The phase II part will evaluate full-dose cisplatin and pemetrexed combined with CBP501 at the MTD determined in the phase I part. Patients will be randomized in a 2:1 ratio to pemetrexed, cisplatin and CBP501 (Arm A) or pemetrexed and cisplatin (Arm B). This phase II part will be evaluated in chemotherapy-naïve patients with malignant pleural mesothelioma Randomization will be stratified by: * Histology: epithelial vs other (sarcomatoid or biphasic) * Performance status: 0-1 vs 2
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
NONE
Enrollment
69
CBP501 25 mg/m2, Pemetrexed 500 mg/m2, cisplatin 75 mg/m2 CBP501 for injection is provided in single dose vials (20 mg) containing a sterile lyophilized powder comprising CBP501 peptide acetate salt (peptide base units). For administration, vial contents are reconstituted in 5% Dextrose Injection, USP, and added to a 100 mL IV bag of 5% Dextrose Injection, USP. Pemetrexed: A commercial formulation of pemetrexed will be used, with reconstitution in 20mL 0.9% sodium chloride solution for injection, then dilution to 100mL. Cisplatin: A commercial formulation will be used and will be diluted in 250 mL of normal saline for administration.
Pemetrexed 500 mg/m2, cisplatin 75 mg/m2 Pemetrexed: A commercial formulation of pemetrexed will be used, with reconstitution in 20mL 0.9% sodium chloride solution for injection, then dilution to 100mL. Cisplatin: A commercial formulation will be used and will be diluted in 250 mL of normal saline for administration.
Dose level 1: CBP501 16 mg/m2, Pemetrexed 500 mg/m2, cisplatin 75 mg/m2 Dose level 2: CBP501 25 mg/m2, Pemetrexed 500 mg/m2, cisplatin 75 mg/m2 CBP501 for injection is provided in single dose vials (20 mg) containing a sterile lyophilized powder comprising CBP501 peptide acetate salt (peptide base units). For administration, vial contents are reconstituted in 5% Dextrose Injection, USP, and added to a 100 mL IV bag of 5% Dextrose Injection, USP. Pemetrexed: A commercial formulation of pemetrexed will be used, with reconstitution in 20mL 0.9% sodium chloride solution for injection, then dilution to 100mL. Cisplatin: A commercial formulation will be used and will be diluted in 250 mL of normal saline for administration.
Mayo Clinic
Scottsdale, Arizona, United States
Arizona Cancer Center
Tucson, Arizona, United States
City of Hope
Duarte, California, United States
University of Chicago
Chicago, Illinois, United States
Karmanos Cancer Institute/Wayne State University
Detroit, Michigan, United States
Nevada Cancer Institute
Las Vegas, Nevada, United States
University of New Mexico Cancer Center
Albuquerque, New Mexico, United States
Memorial-Sloan Kettering Cancer Center
New York, New York, United States
Cleveland Clinic
Cleveland, Ohio, United States
Penn State Milton S. Hershey Medical Ctr.
Hershey, Pennsylvania, United States
...and 2 more locations
4M PFS Rate of Patients With Previously Untreated, Unresectable Malignant Pleural Mesothelioma (MPM) Treated With CBP501, Pemetrexed and Cisplatin
Planned: Forty-two patients were to be treated in Arm A. If ≥ 23 patients (\>54%) were free of progression and death at 4 months, then the study regimen would be considered for further evaluation in this indication.
Time frame: End of study
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