Antiangiogenic therapy against experimental glioblastoma using genetically engineered cells producing interferon-α, angiostatin, or endostatin

Sophie De Boüard, Jean Sébastien Guillamo, Christo Christov, Nathalie Lefévre, Pierre Brugières, Eleonora Gola, Pauline Devanz, Stefano Indraccolo, Marc Peschanski

Research output: Contribution to journalArticle

Abstract

Inhibition of angiogenesis has been considered among the most promising approaches to treat highly vascularized solid tumors such as glioblastoma. In this study, we designed and validated a new in vitro assay system based on the implantation of tumor cells into organotypic brain slice cultures. We evaluated the effects of local production of three endogenous inhibitors of angiogenesis, angiostatin, endostatin, and interferon (IFN)-α1, using stably transfected rat (9L) and human (GL15) glioblastoma cells on tumor vascularization and growth. Despite similar effectiveness of the three proteins in a classic in vitro endothelial cell migration assay, IFN-α1 demonstrated the most potent antiangiogenic effect in organotypic brain slice cultures. In vivo, after intracerebral implantation of such genetically modified glioblastoma cells, IFN-α1 caused a dramatic decrease in tumor volume revealed by magnetic resonance imaging and by postmortem histology. The mechanisms of this antitumor effect were most likely caused by the major antiangiogenic action of the cytokine, because IFN-α1 expression provoked a pronounced decrease in blood vessel density, which was accompanied by extensive necrosis in the body mass of the tumors. The median survival time of rats implanted intracerebrally with IFN-α-expressing 9L cells tripled, and was still significantly increased when these constituted only 1% of transplanted tumor cells. A similar effect was seen when 50% of the transplanted cells were replaced by IFN-α-expressing bone marrow stromal cells. These data point to the local delivery of IFN-α1 using cell vectors as a potent tool for the inhibition of tumor-induced angiogenesis.

Original languageEnglish
Pages (from-to)883-895
Number of pages13
JournalHuman Gene Therapy
Volume14
Issue number9
DOIs
Publication statusPublished - Jun 10 2003

ASJC Scopus subject areas

  • Genetics

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