Increasing complexity of the karyotype in 50 human gliomas. Progressive evolution and de novo occurrence of cytogenetic alterations

Ivana Magnani, Silvana Guerneri, Bianca Pollo, Nicola Cirenei, Bruno M. Colombo, Giovanni Broggi, Carlo Galli, Orso Bugiani, Stefano DiDonato, Gaetano Finocchiaro, Anna Maria Fuhrman Conti

Research output: Contribution to journalArticlepeer-review

Abstract

We studied the karyotypes of eight differentiated gliomas, 19 anaplastic gliomas, and 23 glioblastomas (GBM). Normal stemlines were present in 70% of the differentiated and anaplastic gliomas; abnormalities were mostly characterized by loss of sex chromosomes. In GBM, on the contrary, only 13% of the stemlines were normal and three groups, 45,XO, near-diploid, and near tetraploid, could be identified. The most frequent alterations among GBM were: total or partial loss of chromosome 10 in nine cases, structural abnormalities of chromosome 9 in seven cases, and loss of the Y chromosome in stemline clones of seven cases. Less frequent abnormalities included chromosomes 7, 1, 3, and 19. Our data support the cytogenetic model of gliomas as multi-stage tumors. GBM, in particular, can originate from the evolution of astrocytomas but can also develop de novo. In both cases loss of genetic material on chromosome 10 seems to play a crucial role.

Original languageEnglish
Pages (from-to)77-89
Number of pages13
JournalCancer Genetics and Cytogenetics
Volume75
Issue number2
DOIs
Publication statusPublished - Jul 15 1994

ASJC Scopus subject areas

  • Cancer Research
  • Genetics
  • Molecular Biology

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