MGMT promoter methylation

Weak MGMT promoter methylation may offer clinical benefits comparable to full methylation, including longer PFI and improved OS compared to unmethylated cases. This positive effect on PFI appears more pronounced in patients receiving concurrent chemoradiotherapy with TMZ. Advanced age continues to be associated with a less favorable prognosis.

MGMT methylation and TERT mutations are independent prognostic markers in glioblastoma. This study provides real-world evidence that both biomarkers retain prognostic value after adjustment for adjuvant treatment within an internally validated model. Combined MGMT/TERT assessment provides clinically meaningful four-tier risk stratification and supports routine prognostic evaluation.

Together, these data provide a standardized longitudinal functional benchmark showing that patient-derived GBM cultures preserve intrinsic metabolic heterogeneity while undergoing time-dependent adaptation, and that migration represents an additional, partially independent functional axis. These findings are hypothesis-generating and support stratified, time-sensitive follow-up studies of metabolic and invasive phenotypes in GBM.

O6-methylguanine-DNA methyltransferase (MGMT) promoter methylation is an important biomarker because it is associated with reduced DNA repair capacity and increased sensitivity to alkylating agents, particularly temozolomide (TMZ)...Because MGMT methylation is biologically continuous, this review further argues that borderline results should be reported as gray-zone or intermediate categories when validated, and that quantitative methylation values should be integrated into subtype-aware multivariable models rather than being reduced exclusively to binary calls. This review summarizes the biological and clinical relevance of MGMT promoter methylation across glioma subtypes and proposes a subtype-aware, treatment-conditional, and assay-aware framework for interpreting its predictive and survival-related significance.

Furthermore, static magnetic fields have been reported to increase apoptosis, inhibit proliferation, and may offer a complementary treatment with low toxicity. These findings suggest that magnetic-field-based approaches offer an innovative strategy for GBM treatment.

Emerging applications in other cancer types are also summarized and discussed. Throughout the review the focus is more on a critical discussion of concepts and relevant publications and their merits and shortcomings than trying to achieve complete coverage of the voluminous literature.

qDMA-HP is comparable to pyrosequencing in prognostic effectiveness but is simpler and more cost-effective, suggesting its potential for broad clinical use.

We retrospectively analyzed 20 patients with newly diagnosed primary IDH-wildtype glioblastoma who underwent gross-total resection followed by standard radiotherapy and temozolomide treatment between 2016 and 2022...However, given the limited sample size, the selection of extreme survival groups, and the predominance of chromosomal polysomy detected by FISH, these findings should be interpreted as hypothesis-generating only. Further validation in larger cohorts using high-resolution genomic methods is warranted.

In parallel, artificial intelligence and machine learning are advancing the field by integrating multi-omics and radiomic data to enhance detection, classify tumors, and predict key molecular alterations, supporting the emerging framework of radiogenomics. Together, these developments are driving a shift toward more precise and dynamic approaches to brain tumor diagnosis and management, with relevance for improving outcomes in older adults with brain cancer.

Glioblastoma multiforme (GBM) is the most aggressive primary brain tumor in adults, with a median survival of 14.6 months under standard radiotherapy and temozolomide (TMZ) chemotherapy...Transfer learning improved generalization across train/test distributions at the cost of peak performance. These findings suggest, for the tested framework in this study, that MGMT methylation status prediction from mpMRI remains fundamentally constrained by dataset heterogeneity and size, irrespective of modality combination strategy, and that T2w coronal acquisitions could be more interesting in future data collection efforts.

MGMT encodes a DNA repair enzyme that removes cytotoxic O⁶-alkylguanine lesions generated by alkylating agents such as temozolomide (TMZ)...Building on these mechanistic insights, this review discusses emerging strategies to overcome MGMT-mediated resistance, including next-generation alkylating agents, epigenetic modulators, combination immunotherapies, and radiogenomic approaches for precision medicine. Understanding MGMT methylation biology may improve patient stratification and support precision-based therapeutic interventions in GBM.

SFRT was associated with longer survival in non-elderly patients, possibly reflecting selection of poorer-risk patients for HFRT. In elderly patients, HFRT was noninferior regardless of MGMTp status, supporting its use as a less intensive approach with comparable survival and reduced treatment burden.