Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins
Phase 1b study evaluating the efficacy and immune response to a synthetic long peptide mutant KRAS vaccine (SPL mKRASvax) combined with Balstilimab and Botensilimab for unresectable or metastatic mismatch repair-proficient (MMR-p) colorectal cancer (mCRC) or unresectable or metastatic MMR-p pancreatic ductal adenocarcinoma (PDAC) patients with measurable disease following first-line chemotherapy.
Inclusion Criteria: * Age ≥18 years. * Have histologically or cytologically - proven cancer of the pancreas or colon. * Have tumor lesions amenable to repeated biopsy, and patient's acceptance to have a tumor biopsy of an accessible lesion at baseline and on treatment if the lesion can be biopsied with acceptable clinical risk (as judged by the investigator). * Measurable disease as per RECIST 1.1. * Have sufficient and accessible tissue for next generation sequencing (NGS) and immune-phenotyping. * Have one of the KRAS mutations included in the vaccine at the time of vaccination expressed in…
SLP mKRASvax with Poly-ICLC adjuvant will be administered on days 1, 8, 15 and 22 in Cycle 1 (Prime Phase) and on day 1 in cycle 4 and every other cycle and beyond (Boost Phase). Up to 5 subcutaneous injections will be administered in the upper thighs, arms and/or back. Drug: 0.3 mg per peptide vaccine + 0.5mg Poly-ICLC
240 mg will be administered as a 30 minute IV. Infusion (-10/+25 minutes) on day 1 and day 15 during Cycle 1 in Prime Phase and on day 1 and day 15 of every cycle in the Boost Phase beginning on Cycle 2 (for a maximum of 2 years from initial vaccination). Drug: 240 mg IV
75 mg will be administered as a 30 minute IV. Infusion (-10/+25 minutes) on Cycle 1 day 1 in Prime Phase and on Cycle 2 day 15 in the Boost Phase. Drug: 75 mg IV
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