title: Metabolic aggressiveness in benign meningiomas with chromosomal instabilities.
abstract: Meningiomas are often considered benign tumors curable by surgery, but most recurrent meningiomas correspond to histologic benign tumors. Because alterations in chromosome 14 among others have suggested clinical aggressiveness and recurrence, determining both the molecular phenotype and the genetic profile may help distinguish tumors with aggressive metabolism. The aim of this study was to achieve higher specificity in the detection of meningioma subgroups by measuring chromosomal instabilities by fluorescence in situ hybridization and cytogenetics and metabolic phenotypes by high-resolution magic angle spinning spectroscopy. We studied 46 meningioma biopsies with these methodologies. Of these, 34 were of WHO grade 1 and 12 were of WHO grade 2. Genetic analysis showed a subgroup of histologic benign meningioma with chromosomal instabilities. The metabolic phenotype of this subgroup indicated an aggressive metabolism resembling that observed for atypical meningioma. According to the metabolic profiles, these tumors had increased energy demand, higher hypoxic conditions, increased membrane turnover and cell proliferation, and possibly increased resistance to apoptosis. Taken together, our results identify distinct metabolic phenotypes for otherwise benign meningiomas based on cytogenetic studies and global metabolic profiles of intact tumors. Measuring the metabolic phenotype of meningioma intact biopsies at the same time as histopathologic analysis may allow the early detection of clinically aggressive tumors.
authors.affiliation: Fundación de Investigación del Hospital Clínico Universitario de Valencia/INCLIVA, Universitat de Valencia, Valencia, Spain. daniel.monleon@uv.es
authors.forename: Daniel
authors.initials: D
authors.lastname: Monleón
authors.forename: José Manuel
authors.initials: JM
authors.lastname: Morales
authors.forename: Ana
authors.initials: A
authors.lastname: Gonzalez-Segura
authors.forename: José Manuel
authors.initials: JM
authors.lastname: Gonzalez-Darder
authors.forename: Rosario
authors.initials: R
authors.lastname: Gil-Benso
authors.forename: Miguel
authors.initials: M
authors.lastname: Cerdá-Nicolás
authors.forename: Concepción
authors.initials: C
authors.lastname: López-Ginés
mesh_terms: D043171:Chromosomal Instability; D002869:Chromosome Aberrations; D020732:Cytogenetic Analysis; D006801:Humans; D017404:In Situ Hybridization, Fluorescence; D009682:Magnetic Resonance Spectroscopy; D008577:Meningeal Neoplasms / Q000235:genetics* / Q000378:metabolism / Q000473:pathology; D008579:Meningioma / Q000235:genetics* / Q000378:metabolism / Q000473:pathology; D055442:Metabolome / Q000235:genetics*; D009367:Neoplasm Staging; D014407:Tumor Cells, Cultured