Neoantigen DNA Vaccine in Pancreatic Cancer Patients Following Surgical Resection and Adjuvant Chemotherapy
Condition: Pancreatic Cancer; Pancreas Cancer; Cancer of the Pancreas
MeSH terms: Pancreatic Neoplasms
Intervention: Personalized neoantigen DNA vaccine; TDS-IM Electrode Array System; Peripheral blood draws
Intervention description: -Personalized polyepitope inserts integrating the prioritized neoantigens and mesothelin epitopes will be designed and then synthesized and cloned into the pING parent vector; -Ichor Medical Systems; -Enrollment, mid adjuvant chemotherapy, end of chemotherapy, week 1, week 5, week 9, week 13, week 17, week 21, week 25, and week 77
Phase: Phase 1
Study type: Interventional
Primary purpose: Treatment
Intervention model: Single Group Assignment
Masking: None (Open Label)
Enrollment: 15.0
Sex: All
Minimum age: 18 Years
Healthy volunteers: No

Summary:

      This is a phase 1 open-label study to evaluate the safety and immunogenicity of a neoantigen
      DNA vaccine strategy in pancreatic cancer patients following surgical resection and adjuvant
      chemotherapy. The neoantigen DNA vaccines will incorporate prioritized neoantigens and
      personalized mesothelin epitopes and will be administered with an electroporation device. The
      hypothesis of this study is that neoantigen DNA vaccines will be safe and capable of
      generating measurable neoantigen-specific CD4 and CD8 T cell responses.
    

Eligibility criteria:

        A patient will be eligible for the trial only if ALL of the following criteria apply:

        Inclusion Criteria:

          -  Histologically or cytologically confirmed diagnosis of pancreatic adenocarcinoma;
             mixed histology will be included as long as the predominant histology is
             adenocarcinoma.

          -  Completed an R0 or R1 surgical resection as determined by pathology

          -  Pathology review demonstrates tumor cellularity no less than 30% in quantities
             sufficient to obtain 6-8 1mm biopsies from the original FFPE blocks.

          -  At least 18 years of age.

          -  Life expectancy of > 12 months.

          -  Eastern Cooperative Oncology Group (ECOG) performance status ≤ 2

          -  Normal bone marrow and organ function as defined below:

               -  white blood cells (WBC) ≥3,000/μL

               -  absolute neutrophil count ≥1,500/μL

               -  platelets ≥100,000/μL

               -  total bilirubin ≤2.5 X institutional upper limit of normal (ULN)

               -  AST/ALT≤ 2.5 X institutional upper limit of normal

               -  creatinine ≤1.5 X institutional upper limit of normal

          -  International Normalized Ratio (INR) and activated partial thromboplastin time (PTT) <
             1.5 x ULN provided the patient is not on anticoagulation therapy.

          -  Patients who have had a stent placed for biliary obstruction can be included in the
             study provided serum bilirubin at time of enrollment is within protocol limits.

          -  Women of child-bearing potential and men must agree to use adequate contraception
             (hormonal or barrier method of birth control, abstinence) prior to study entry and for
             the duration of study participation. Should a woman become pregnant or suspect she is
             pregnant while participating in this study, she must inform her treating physician
             immediately.

          -  Able to understand and willing to sign an IRB approved written informed consent
             document.

        Patients may be consented prior to receiving adjuvant therapy, or during the course of
        adjuvant therapy. Adjuvant therapy must meet the following criteria below for enrollment to
        the trial:

          -  Initiation of adjuvant chemotherapy within 12 weeks of surgery

          -  Completion of at least 4 months of adjuvant chemotherapy with gemcitabine/capecitabine
             or similar adjuvant chemotherapy at the discretion of the patient's medical
             oncologist.

          -  Additional chemoradiation therapy as recommended by the patient's medical oncologist.

          -  Reimaging within 4 weeks of last dose of chemotherapy demonstrates no evidence of
             recurrent disease and CA 19-9 is less than 92.5 u/mL

          -  Dose modifications and/or delays in adjuvant chemotherapy is at the discretion of the
             treating physician -There is a 1 week washout prior to Day 1 of vaccine for patients
             on daily systemic steroids at doses exceeding 10 mg prednisone.

        Exclusion Criteria:

          -  Evidence of neuroendocrine tumor, duodenal adenocarcinoma, or ampullary
             adenocarcinoma.

          -  Received neoadjuvant chemotherapy for their pancreatic adenocarcinoma

          -  Evidence of disease recurrence or metastasis following surgical resection at any time
             prior to the first vaccination administration. Most patients will undergo restaging
             midway through adjuvant chemotherapy and at the completion of therapy; however, timing
             of imaging is at the discretion of the patient's medical oncologist.

          -  History of other malignancy ≤ 3 years previous with the exception of basal cell or
             squamous cell carcinoma of the skin which were treated with local resection only or
             carcinoma in situ of the cervix.

          -  Receiving any other investigational agents, or has received an investigational agent
             within the last 30 days.

          -  Known allergy, or history of serious adverse reaction to vaccines such as anaphylaxis,
             hives, or respiratory difficulty.

          -  Acute or chronic, clinically significant hematologic, pulmonary, cardiovascular,
             hepatic renal, and/or other functional abnormality that would jeopardize the health
             and safety of the participant as determined by the investigator based on medical
             history, physical examination, laboratory values, and/or diagnostic studies.

          -  A psychiatric illness/social situations that would limit compliance with study
             requirements as determined by the investigator from the medical history, physical
             exam, and/or medical record

          -  History of syncopal or vasovagal episode as determined by medical record and history
             in the 12 month period prior to first vaccination administration.

          -  Individuals in whom a skinfold measurement of the cutaneous and subcutaneous tissue
             for eligible injection sites (left and right medial deltoid region) exceeds 40 mm.

          -  Individuals in whom the ability to observe possible local reactions at the eligible
             injection sites (deltoid region) is, in the opinion of the investigator, unacceptably
             obscured due to a physical condition or permanent body art.

          -  Therapeutic or traumatic metal implant in the skin or muscle of either deltoid region.

          -  Any chronic or active neurologic disorder, including seizures and epilepsy, excluding
             a single febrile seizure as a child.

          -  Current use of any electronic stimulation device, such as cardiac demand pacemakers,
             automatic implantable cardiac defibrillator, nerve stimulators, or deep brain
             stimulators.

          -  Prior or currently active autoimmune disease requiring management with
             immunosuppression. This includes inflammatory bowel disease, ulcerative colitis,
             Crohn's disease, systemic vasculitis, scleroderma, psoriasis, multiple sclerosis,
             hemolytic anemia, immune-mediated thrombocytopenia, rheumatoid arthritis, systemic
             lupus erythematosus, Sjögren's syndrome, sarcoidosis, or other rheumatologic disease
             or any other medical condition or use of medication (e.g., corticosteroids) which
             might make it difficult for the patient to complete the full course of treatments or
             to generate an immune response to vaccines. In the case of asthma or chronic
             obstructive pulmonary disease taking inhaled corticosteroids that does not require
             daily systemic corticosteroids is acceptable. Additionally, local acting steroids
             (topical, inhaled, or intraarticular) will be allowed. Patients on intermittent or
             short course steroids will be allow if the dose does not exceed 4 mg of dexamethasone
             (or equivalent) per day for > 7 consecutive days. Any patients receiving steroids
             should be discussed with the PI to determine if eligible.

          -  Pregnant and/or breastfeeding.

          -  Known HIV-positive status. These patients are ineligible because of the potential
             inability to generate an immune response to vaccines.