title: Gene expression profiles of meningiomas are associated with tumor cytogenetics and patient outcome.
abstract: Cytogenetic analysis is a powerful tool for predicting recurrence in meningiomas, even among histologically benign/grade I tumors. Despite this, no study has been reported in which the impact of tumor cytogenetics on the gene expression profiles (GEP) has been analyzed in meningiomas. Here, we analyzed the GEP of 47 tumors and correlated them with the most clinical relevant cytogenetic subgroups of meningiomas, as confirmed through the analysis of 172 patients. Additionally three normal meningeal samples were also studied. Overall, our results show a clear association between the clinically relevant cytogenetic subgroups of meningiomas including diploid tumors (n = 18), isolated -22/22q- (n = 12), del(1p36) alone (n = 4) and complex karyotypes associated with del(1p36) and/or -14q (n = 13) and their GEP. Accordingly, based on the expression of 85 genes (40 of which were coded in the altered chromosomes used for patient stratification) the cytogenetic class of the tumor could be predicted with an error of <1%, a clear association being found between the GEP and patient outcome (P = 0.03) but not tumor histopathology. In summary, we show a clear association between GEP of neoplastic cells and clinically relevant cytogenetic subgroups of meningiomas.
authors.affiliation: Instituto de Estudios de Ciencias de la Salud de Castilla (IECSCYL) y León-Hospital Universitario de Salamanca, Spain.
authors.forename: Maria Dolores
authors.initials: MD
authors.lastname: Tabernero
authors.forename: Angel
authors.initials: A
authors.lastname: Maillo
authors.forename: Carlos J
authors.initials: CJ
authors.lastname: Gil-Bellosta
authors.forename: Abel
authors.initials: A
authors.lastname: Castrillo
authors.forename: Pablo
authors.initials: P
authors.lastname: Sousa
authors.forename: Marta
authors.initials: M
authors.lastname: Merino
authors.forename: Alberto
authors.initials: A
authors.lastname: Orfao
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D020732:Cytogenetic Analysis; D018572:Disease-Free Survival; D005260:Female; D020869:Gene Expression Profiling; D006801:Humans; D017404:In Situ Hybridization, Fluorescence; D053208:Kaplan-Meier Estimate; D008297:Male; D008577:Meningeal Neoplasms / Q000235:genetics* / Q000401:mortality / Q000473:pathology; D008579:Meningioma / Q000235:genetics* / Q000401:mortality / Q000473:pathology; D008875:Middle Aged; D009364:Neoplasm Recurrence, Local / Q000235:genetics*; D020411:Oligonucleotide Array Sequence Analysis; D016896:Treatment Outcome; D055815:Young Adult