CAN-2409 Plus Prodrug With Standard of Care Immune Checkpoint Inhibitor for Stage III/IV NSCLC

Inclusion Criteria:

Patients with Stage III/IV NSCLC on first line treatment with anti-PD-1/PD-L1 (ICI) +/- chemotherapy for their current stage of disease and fits into one of the following cohorts as determined by investigator, preferably as per RECIST 1.1: Cohort 1) have persistent but stable disease at least 18 weeks after starting ICI treatment, or Cohort 2) have radiographic progressive disease at least 18 weeks after starting ICI treatment
RECIST evaluable disease including a lesion that is amenable to injection
Able and willing to undergo a pre-treatment and on-treatment biopsies, if feasible
ECOG Performance status of 0 or 1
18 years of age or older
Granulocyte count (ANC) ≥ 1,000/mm3
Hemoglobin ≥ 8 g/dl (patients may be transfused to meet this criterion)
Platelets ≥ 75,000/mm3
Total bilirubin ≤ 1.5 x upper limit of normal, except for patients with known Gilbert disease who must have total bilirubin ≤ 3 x upper limit of normal
SGOT (AST) ≤ 5x upper limit of normal and if elevated, not clinically significant such that ICI can continue
INR no more than 0.2 above upper limit of normal and aPTT not >1.2 x upper limit of normal, and value is acceptable for patient to undergo injection procedure. If on anti-coagulation, it must be clinically acceptable to hold anti-coagulation for the injection procedures per investigator discretion
Serum creatinine < 2mg/dl and calculated creatinine clearance > 30ml/min
Clinically stable and able to continue ICI for at least the 12-week treatment period
Patients must give study specific informed consent prior to enrollment and any study specific procedures

Exclusion Criteria:

Patients with a history of severe hypersensitivity reaction to ICI
Patients who require ongoing therapy with disease-modifying antirheumatic drugs (DMARDs), immunomodulators or systemic immunosuppressive drugs including systemic corticosteroids (>10 mg prednisone per day or equivalent) - premedication for ICI or chemotherapy is allowed
Patients with a history of active autoimmune disease requiring treatment in the past 2 years
Patients with uncontrolled intercurrent illness including, but not limited to, ongoing or active infection, symptomatic congestive heart failure, unstable angina pectoris, cardiac arrhythmia, active hepatitis, or psychiatric illness/social situations that would limit compliance with study requirements
Women who are pregnant, lactating or intend to become pregnant during the study
Patients who are known to be HIV positive
Patients with a history of hypersensitivity or allergic reactions to valacyclovir or acyclovir
Patients with significant heart disease (New York Heart Association Functional Classification III or IV)
Patients with continuous oxygen dependence >2L/min at rest
Tumor impinging on a neurovascular structure such that inflammation in the site may put patient at risk of compromise as determined by the investigator
Patients with uncontrolled brain metastases as per investigator
Patients with liver metastases involving more than half of the liver
Patients with known EGFR mutation, ALK fusion, or ROS1 fusion positive NSCLC, or that are receiving tyrosine kinase inhibitor (TKI) agents/ALK/ROS1 inhibitors
Patients with known interstitial lung diseases (ILDs) requiring active therapy (Radiographic fibrosis not requiring therapy is allowed)
Patients receiving vascular endothelial growth factor (VEGF) inhibitors (including bevacizumab, ramucirumab) within the past 2 months or five half-lives, whichever is longer
Patients must have no concurrent malignancy requiring treatment (except squamous or basal cell skin cancers)