Project description:This study reports clinical, genetic, epigenetic, gene expression, and cellular features distinguishing meningioma DNA methylation subgroups within meningioma DNA methylation groups. We present these data in the context of molecular and clinical models predicting postoperative outcomes across 565 meningiomas with comprehensive clinical follow-up from independent discovery and validation institutions. By discovering meningioma DNA methylation subgroups within meningioma DNA methylation groups, we provide an opportunity to resolve inconsistencies in the recent literature. In doing so, our study establishes an architecture that unifies opposing biological theories for the most common primary intracranial tumor
Project description:DNA methylation profiling of human FFPE meningioma samples These samples were processed as part of a study developing and validating a targeted gene expression biomarker of meningioma outcomes and benefit from radiotherapy.
Project description:Tumor development relies on numerous factors, including the capacity to adapt to hypoxic conditions. Hypoxic microenvironment is a critical driver of the malignant phenotype, which is often correlated with meningioma grade, aggressive behavior, therapeutic resistance, and higher recurrence rates, leading to poor prognosis. Epigenetic alterations are key regulators of gene expression. Changes in DNA methylation patterns are the most extensively characterized epigenetic modifications associated with tumorigenesis. Metastasis, severity, and recurrence of meningioma have all been associated with hypo- and hypermethylation of various genes. We aim to identify the hypoxia-induced genome-wide DNA methylation profile of meningioma.
