DOC1021 Dendritic Cell Immunotherapy for Treatment of Newly Diagnosed Adult Glioblastoma (GBM)

Inclusion criteria

• Provision of signed and dated informed consent form
• Stated willingness to comply with all study procedures and availability for the duration of the study
• Age 18 years or older
• Presumed diagnosis of glioblastoma IDH-wt (as per the 2021 WHO Classification of CNS Tumors) deemed to be potentially resectable and deemed to be a good candidate for post-operative standard of care temozolomide and radiation therapy.

• Surgical objective is for gross total resection (GTR)/near-total resection (NTR) de-fined as ≥ 95% of contrast enhancing (CE) tumor removed plus ≤ 1 cm3 residual CE tumor. Patients with subtotal resection will still be eligible if at least 70% of the CE tumor is resected.
• Eligibility will be confirmed after surgery when diagnosis of glioblastoma IDH-wt confirmed prior to randomization. Randomization can occur with only IDH1 immunohistochemistry and when additional molecular testing is available, if glioblastoma IDH-wt is not confirmed, the participant will be deemed a screen failure and replaced.
• Patients with prior biopsy or subtotal resection are eligible if no other anti-cancer treatment received for glioblastoma and additional resection indicated.
• Ability to receive filgrastim (e.g., Neupogen), leukapheresis and 3 bi-weekly injections of DOC1021 near deep cervical lymph nodes + weekly pIFN x 6 weeks.
• Females of reproductive potential must have a negative serum pregnancy test and agree to use effective contraception (as determined appropriate for the patient by the investigator) during study treatment.
• Adequate kidney, liver, bone marrow function, and immune function, as follows:

• Hemoglobin ≥ 8.0 gm/dL
• Absolute neutrophil count (ANC) ≥ 1,500 cells/mm3
• Platelet count ≥ 75,000/mm3
• Calculated creatinine clearance (CrCl) > 30 mL/min using Cockcroft and Gault for-mula:

i. For males = (140 - age[years]) x (body weight [kg]) / (72 x serum creatinine [mg/dL]) ii. For females = 0.85 x value from male formula e. Total bilirubin ≤ 1.5 times upper limit of normal (ULN) except in patients with Gilbert's disease for which total bilirubin must be ≤ 2 times ULN f. Aspartate transaminase AST (SGOT) and alanine aminotransferase ALT (SGPT) ≤ 3 times the ULN

• Karnofsky Performance Score ≥ 70

Exclusion criteria

• Infratentorial, recurrent, leptomeningeal or extracranial disease.
• Patients who are pregnant or breastfeeding.
• Known active HIV or hepatitis infection. Patients with HIV that is well-controlled and have undetectable viral titers remain eligible. Patients with history of HCV adequately treated such that RNA viral load is negative also remain eligible.
• Any severe or uncontrolled medical condition or other condition that could affect participation in this study as determined by the investigator, including but not limited to: uncontrolled or severe cardiac disease, systemic autoimmune disorders requiring immunosuppression in the past 2 years*, autoimmune hyper/hypothyroidism, untreated viral hepatitis, autoimmune hepatitis. *autoimmune disorders include but are not limited to rheumatoid arthritis, psoriasis and inflammatory bowel disease and immunosuppressive medications include DMARDs like methotrexate, TNF inhibitors, IL-6 receptor blockers, CD80/86 inhibitors, anti-CD20 and JAK inhibitors
• Treatment with another investigational drug or other experimental intervention within the last 30 days.