Magnetic resonance imaging and o-(2-[F]fluoroethyl)-l-tyrosine positron emission tomography for early response assessment of nivolumab and bevacizumab in patients with recurrent high-grade astrocytic glioma.

Background: In the present study, early response assessment by o-(2-[F]fluoroethyl)-l-tyrosine (FET) positron emission tomography (PET) and contrast-enhanced magnetic resonance imaging (MRI) were investigated in a phase II open-label single-center study of nivolumab plus bevacizumab for recurrent high-grade astrocytic glioma.

Methods: Twenty patients with nonresectable first recurrence of high-grade astrocytic glioma after EORTC/NCIC protocol underwent [F]FET PET/MRI at baseline and after 2 cycles of treatment. Whole brain values of contrast-enhancing volume on MRI (CEV), of the mean (TBR) and maximal tumor-to-background ratio (TBR), and of metabolically active volume (MTV) on [F]FET PET were obtained.

Degradation fragments of Tau and type IV collagen as serum biomarkers in patients with recurrent glioblastoma treated with nivolumab and bevacizumab.

Purpose: There is an unmet need for new treatment options and biomarkers for patients with glioblastoma (GBM). Here we investigated three non-invasive biomarkers: type VI collagen degraded by granzyme B (C4G) and matrix metalloproteases (C4M), respectively, and ADAM10-degraded Tau (Tau-A).

Methods: Biomarker levels in pre- and on-treatment serum samples from patients with recurrent GBM (n = 39) treated with nivolumab and bevacizumab (NCT03890952) were compared to healthy levels (n = 22) and associated with overall survival (OS) outcome (median cutpoint).

Nivolumab Reaches Brain Lesions in Patients with Recurrent Glioblastoma and Induces T-cell Activity and Upregulation of Checkpoint Pathways.

Glioblastoma (GBM) is an aggressive brain tumor with poor prognosis. Although immunotherapy is being explored as a potential treatment option for patients with GBM, it is unclear whether systemic immunotherapy can reach and modify the tumor microenvironment in the brain. We evaluated immune characteristics in patients receiving the anti-PD-1 immune checkpoint inhibitor nivolumab 1 week prior to surgery, compared with control patients receiving salvage resection without prior nivolumab treatment.

Immunotherapy drives mesenchymal tumor cell state shift and TME immune response in glioblastoma patients.

Background: Glioblastoma is a highly aggressive type of brain tumor for which there is no curative treatment available. Immunotherapies have shown limited responses in unselected patients, and there is an urgent need to identify mechanisms of treatment resistance to design novel therapy strategies.

Methods: Here we investigated the phenotypic and transcriptional dynamics at single-cell resolution during nivolumab immune checkpoint treatment of glioblastoma patients.

The Neurogenome study: Comprehensive molecular profiling to optimize treatment for Danish glioblastoma patients.

Background: Glioblastoma is an aggressive brain cancer with no possibility for cure. Treatment and survival have only improved slightly since 2005 when the current regime was implemented. The limited improvements in the treatment of glioblastoma may reflect our poor understanding of the disease.