H3.3K27M Peptide Vaccine With Nivolumab for Children With Newly Diagnosed DIPG and Other Gliomas

This is 3-arm, multicenter study that will be conducted through the Pacific Pediatric Neuro-oncology Consortium (PNOC). This study will assess the safety and immune activity of a synthetic peptide vaccine specific for the Histone 3 lysine27-to-methionine (H3.3K27M) epitope given in combination with poly-ICLC and the H3.3K27M epitope given in combination with poly-ICLC and the PD-1 inhibitor, nivolumab, in HLA-A2 (02:01)+ children with newly diagnosed diffuse intrinsic pontine glioma (DIPG) or other midline gliomas that are positive for H3.3K27M.