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  1. Home
  3. Evolutionary Trajectories Of Idh-mutant Astrocytoma Identify Molecular Grading Markers Related To Cell Cycling.
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  3. Evolutionary Trajectories Of Idh-mutant Astrocytoma Identify Molecular Grading Markers Related To Cell Cycling.

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Evolutionary trajectories of IDH-mutant astrocytoma identify molecular grading markers related to cell cycling.

Wies R Vallentgoed1, Youri Hoogstrate2, Karin A van Garderen3

  • 1Neurology Department Erasmus MC, Rotterdam, The Netherlands. w.r.vallentgoed@amsterdamumc.nl.

Nature Cancer
|August 19, 2025

View abstract on PubMed

Summary
This summary is machine-generated.

Malignant progression in IDH-mutant astrocytomas involves cell cycling, differentiation changes, and extracellular matrix remodeling. A DNA methylation signature aids in grading these brain tumors for better clinical decisions.

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Area of Science:

  • Neuro-oncology
  • Cancer Genomics
  • Epigenetics

Background:

  • The evolutionary trajectory of IDH-mutant astrocytomas towards malignancy is not fully understood.
  • Identifying molecular drivers of malignant progression is crucial for improving patient outcomes.

Purpose of the Study:

  • To elucidate the multiomic mechanisms underlying malignant progression in IDH-mutant astrocytomas.
  • To identify novel biomarkers for objective tumor grading and prognostic assessment.

Main Methods:

  • Multiomic profiling (genomics, epigenomics, transcriptomics) of matched initial and recurrent IDH-mutant astrocytoma samples from 105 patients.
  • Integration of multiomic data with clinical annotations.
  • Validation of findings in independent patient cohorts.

Main Results:

  • Malignant progression is characterized by concurrent alterations in cell cycling, tumor cell differentiation, and extracellular matrix remodeling.
  • Decreased DNA methylation levels correlate with malignant transformation and adverse genetic events.
  • A robust DNA methylation signature predictive of survival was identified and validated.

Conclusions:

  • The study reveals key molecular mechanisms driving IDH-mutant astrocytoma malignancy.
  • A DNA methylation-based signature offers objective grading for clinical decision-making in IDH-mutant astrocytomas.
  • Radiotherapy and chemotherapy showed limited impact on the studied molecular features of progression.