GRN-1201 With Pembrolizumab in Subjects With Metastatic PD-L1+ NSCLC

This is a non-randomized, Phase 2, 2-stage, open-label, multi-center study of GRN-1201/sargramostim + pembrolizumab in subjects with metastatic PD-L1+ NSCLC. All subjects will have newly diagnosed metastatic PD-L1+ (TPS ≥ 50%) NSCLC with no epidermal growth factor receptor (EGFR) or anaplastic lymphoma kinase (ALK) genomic tumor aberrations. The study will follow a Simon two-stage design with up to 64 total subjects enrolled. All subjects will receive GRN-1201 at 3.0 mg in combination with 75 µg sargramostim and 200 mg pembrolizumab. GRN-1201 is to be administered once weekly for 4 weeks followed by every 3-week dosing for an additional 12 doses (16 total doses of GRN-1201). Each dose of GRN-1201 will be given as 1 mL divided into 4 separate 0.25 mL intradermal injections on each day of treatment. Pembrolizumab is to be given every 3 weeks for up to a total of 35 doses. This study will consist of a screening period of up to 28 days; a treatment period consisting of GRN-1201/sargramostim administered weekly for 4 weeks (4 doses) followed by administration every 3 weeks for 12 additional doses . Pembrolizumab is to be given every 3 weeks for up to a total of 35 doses. A follow up visit will occur approximately 4 weeks after the last administration of treatment for the study. In addition, all subjects will be followed for evaluation of disease progression and survival