A prognostic neural epigenetic signature in high-grade glioma

Area of Science:

• Neuro-oncology
• Epigenetics
• Genomics

Background:

• Neural-tumor interactions influence glioma growth, but clinical evidence is limited.
• An epigenetically defined neural signature in glioblastoma can predict patient survival.

Purpose of the Study:

• To identify and validate an epigenetically defined neural signature in glioblastoma.
• To investigate the clinical relevance of this signature for patient survival and tumor characteristics.

Main Methods:

• Deconvolution of tumor DNA using reference neural cell signatures to classify tumors.
• Single-cell transcriptomic analysis to characterize cell populations.
• In vitro and in vivo experiments to assess neuron-to-glioma synapse formation.
• Analysis of neuroimaging (magnetoencephalography, MRI) and plasma biomarkers (DNA, brain-derived neurotrophic factor).

Main Results:

• High-neural glioblastomas show hypomethylation and gene upregulation linked to synaptic integration.
• Malignant stem-like cells of neural lineage are abundant in high-neural tumors.
• Neuron-to-glioma synapse formation occurs in high-neural gliomas, correlating with poorer survival.
• A high-neural signature is linked to decreased overall and progression-free survival and increased functional connectivity.

Conclusions:

• An epigenetically defined neural signature is prognostically relevant in high-grade gliomas.
• High-neural gliomas may benefit from maximized surgical resection.
• The neural signature is detectable via plasma biomarkers and neuroimaging.