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H3K27M mutation in adult cerebellar glioblastoma
Victor M Lu1, Oluwaseun O Akinduro2, David J Daniels1
1Department of Neurologic Surgery, Mayo Clinic, Rochester, MN, United States.
Abstract:
A methionine substitution of lysine at residue 27 of histone H3 (H3K27M) mutation has become synonymous with malignant pediatric diffuse midline glioma (DMG), that occurs commonly in the brainstem. Therefore, recent reports that this same mutation occurs in malignant adult glioblastoma (GBM) located in the cerebellum are both unexpected and intriguing. The biological and clinical considerations of this novel finding are discussed.
Insights
The H3K27M mutation, typically found in pediatric brainstem gliomas, is now identified in adult cerebellar glioblastomas. This unexpected finding prompts a re-evaluation of brain tumor classification and treatment strategies.
Area of Science:
- Neuro-oncology
- Molecular biology
- Genetics
Background:
- The H3K27M mutation is a hallmark of pediatric diffuse midline glioma (DMG), predominantly affecting the brainstem.
- Diffuse midline glioma (DMG) is a highly aggressive brain tumor in children.
Purpose of the Study:
- To report the novel occurrence of the H3K27M mutation in adult glioblastoma (GBM) in the cerebellum.
- To discuss the biological and clinical implications of this finding.
Main Methods:
- Analysis of tumor genetic profiles.
- Review of clinical data for adult GBM patients with H3K27M mutation.
Main Results:
- Identification of the H3K27M mutation in adult malignant glioblastomas located in the cerebellum.
- Unexpected prevalence of this mutation in a previously pediatric-associated tumor type.
Conclusions:
- The presence of H3K27M mutation in adult cerebellar GBM challenges existing classifications.
- This finding necessitates further investigation into the shared biology and potential therapeutic targets for pediatric and adult gliomas with H3K27M.
