DNAJB1-PRKACA Fusion Kinase Peptide Vaccine Combined With Nivolumab and Ipilimumab for Patients With Fibrolamellar Hepatocellular Carcinoma

Eligibility Criteria

• * Cohort A and B: Must have histologically confirmed FLC (fibrolamellar hepatocellular cancer) that is metastatic or unresectable.
• * Cohort C: Patients with histologically proven metastatic or unresectable DNAJB1-PRKACA fusion transcript positive solid tumor malignancies, non-FLC solid tumors.
• * Cohort A and B: Age \> 12 years. Note: Subjects age \> 12 years but \<18 are eligible to enroll only after 6 adult patients have enrolled on the study.
• * Cohort A and B: Patients \< 18 years old must have a body weight ≥40 kg.
• * Cohort C: Patients must be Age ≥ 18 years.
• * • Presence of DNAJB1-PRKACA fusion transcript, assessed by RNA-sequencing, DNA-sequencing, or in situ hybridization in the archival tissue.
• * ECOG performance status of ≤2 (Karnofsky ≥60%)
• * Patients must have adequate liver, kidney and marrow function defined by study-specified laboratory tests prior to initial study drug.
• * Patients must have measurable disease per RECIST 1.1.
• * Patients \> 18 years old must have an accessible non-bone tumor lesion from which serial core biopsy specimens can be obtained.
• * Must be willing to provide tissue and blood samples for mandatory translational research.
• * Woman of childbearing potential must have a negative pregnancy test and follow contraceptive guidelines as defined per protocol.
• * Men must use acceptable form of birth control while on study.
• * Ability to understand and willingness to sign a written informed consent document.
• * Cohort A and C: Patients with a history of prior treatment with checkpoint inhibitors, such as anti-PD-1, anti-PD-L1, anti-PD-L2, anti-CD137, anti-OX-40, anti-CD40, anti-CTLA-4, or anti-LAG-3 antibodies. NOTE: Prior therapy with interferon-alpha is allowed.
• * Cohort B: Participants a with history of unacceptable, life-threatening toxicity related to prior immune therapy (eg, anti-CTLA-4 or anti-PD-1/PD-L1 treatment, any other antibody or drug specifically targeting T-cell co-stimulation or immune checkpoint pathways) except those that are unlikely to re-occur with standard countermeasures (eg, hormone replacement after endocrinopathy).
• * Have had chemotherapy or other systemic therapy or radiotherapy, as follows:
• * Have had chemotherapy, biological cancer therapy, or radiation 14 days prior to the first dose of study drug.
• * Have had surgery within 28 days of dosing of investigational agent, excluding minor procedures (dental work, skin biopsy, etc.), celiac plexus block, and biliary stent placement.
• * Have received other approved or investigational agents or device within 28 days of the first dose of study drug.
• * Have not recovered from acute adverse events to grade ≤1 or baseline due to agents administered.
• * Have received any non-oncology live vaccine therapy used for prevention of infectious diseases within 28 days of study treatment
• * Known sensitivity to or history of allergic reactions to investigational drug (s).
• * Hypersensitivity reaction to any monoclonal antibody.
• * Has active autoimmune disease that has required systemic treatment in the past 2 years, or a documented history of clinically severe autoimmune disease, or a syndrome that requires systemic steroids or immunosuppressive agents.
• * Presence of any tissue or organ allograft, regardless of need for immunosuppression, including corneal allograft. Patients with a history of allogeneic hematopoeitic stem cell transplant will be excluded.
• * Has a diagnosis of immunodeficiency.
• * Systemic treatment with either corticosteroids (\>10 mg daily prednisone equivalents) or other immunosuppressive medications within 7 days of study drug administration.
• * Symptomatic interstitial lung disease.
• * Has a pulse oximetry of \<92% on room air or is on supplemental home oxygen.
• * Active or untreated brain metastases or leptomeningeal metastases.
• * Uncontrolled intercurrent illness including, but not limited to, uncontrolled infection, symptomatic congestive heart failure, unstable angina, cardiac arrhythmia, metastatic cancer, or psychiatric illness/social situations that would limit compliance with study requirements.
• * Are pregnant or breastfeeding.
• * Infection with HIV or hepatitis B or C.
• * Have had evidence of active or acute diverticulitis, intra-abdominal abscess, or GI obstruction.
• * Unwilling or unable to follow the study schedule for any reason.
• * Any other sound medical, psychiatric, and/or social reason as determined by the Investigator.
• * Any illicit drugs or other substance abuse.
• * Clinically meaningful ascites.