Role of Btg2 in the progression of a PDGF-induced oligodendroglioma model

Irene Appolloni, Sebastiano Curreli, Sara Caviglia, Manuela Barilari, Eleonora Gambini, Aldo Pagano, Paolo Malatesta

Research output: Contribution to journalArticle

Abstract

Tumor progression is a key aspect in oncology. Not even the overexpression of a powerful oncogenic stimulus such as platelet derived growth factor-B (PDGF-B) is sufficient per se to confer full malignancy to cells. In previous studies we showed that neural progenitors overexpressing PDGF-B need to undergo progression to acquire the capability to give rise to secondary tumor following transplant. By comparing the expression profile of PDGF-expressing cells before and after progression, we found that progressed tumors consistently downregulate the expression of the antiproliferative gene Btg2. We therefore tested whether the downregulation of Btg2 is sufficient and necessary for glioma progression with loss and gain of function experiments. Our results show that downregulation of Btg2 is not sufficient but is necessary for tumor progression since the re-introduction of Btg2 in fully progressed tumors dramatically impairs their gliomagenic potential. These results suggest an important role of Btg2 in glioma progression. Accordingly with this view, the analysis of public datasets of human gliomas showed that reduced level of Btg2 expression correlates with a significantly worse prognosis.

Original languageEnglish
Pages (from-to)14667-14678
Number of pages12
JournalInternational Journal of Molecular Sciences
Volume13
Issue number11
DOIs
Publication statusPublished - 2012

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Keywords

  • Glioma progression
  • High grade oligodendroglioma
  • Tumor suppressor

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Organic Chemistry
  • Spectroscopy
  • Inorganic Chemistry
  • Catalysis
  • Molecular Biology
  • Computer Science Applications
  • Medicine(all)

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