INO-5401 and INO-9012 Delivered by Electroporation (EP) in Combination With Cemiplimab (REGN2810) in Newly-Diagnosed Glioblastoma (GBM)

INO-5401 is a combination of 3 separate DNA plasmids targeting Wilms tumor gene-1 (WT1) antigen, prostate-specific membrane antigen (PSMA) and human telomerase reverse transcriptase (hTERT) genes. Starting on Day 0 three milligrams (mg) of each plasmid will be delivered IM followed by EP using the CELLECTRA® 2000 EP device every three weeks for four doses, and then every 9 weeks until disease progression as defined by immunotherapy Response Assessment in Neuro-Oncology (iRANO), unacceptable toxicity, withdrawal of consent, or death.

INO-9012 is a DNA plasmid for expression of human interleukin-12 (IL-12). Starting on Day 0 one mg plasmid will be delivered IM followed by EP using the CELLECTRA® 2000 EP device every three weeks for four doses, and then every 9 weeks until disease progression as defined by iRANO, unacceptable toxicity, withdrawal of consent, or death.

Cemiplimab is an antibody to programmed death-1 (PD-1) protein. Starting on Day 0 cemiplimab will be administered intravenously (IV) every three weeks at a dose of 350 mg per dose in the absence of dose holding, until disease progression as defined by iRANO, unacceptable toxicity, withdrawal of consent, or death.

Radiation therapy (RT) will begin no later than 42 days after surgical intervention, and should start approximately 2 weeks after Day 0. RT will be given for three weeks.

Temozolomide (TMZ) will be given daily during radiation therapy (RT) at a dose of 75 milligrams per square meter (mg/m\^2).