Expression of antisense uPAR and antisense uPA from a bicistronic adenoviral construct inhibits glioma cell invasion, tumor growth, and angiogenesis

Christopher S. Gondi, Sajani S. Lakka, Niranjan Yanamandra, Khawar Siddique, Dzung H. Dinh, William C. Olivero, Meena Gujrati, Jasti S. Rao

Research output: Contribution to journalArticle

Abstract

Urokinase-type plasminogen activator (uPA) and its receptor (uPAR) play an important role in the invasiveness of gliomas and other infiltrative tumors. In glioma cell lines and tumors, high grade correlates with increased expression of uPAR and uPA. We report here the downregulation of uPAR and uPA by delivery of antisense sequences of uPAR and uPA in a single adenoviral vector, Ad-uPAR-uPA (Ad, adenovirus). The bicistronic construct (Ad-uPAR-uPA) infected glioblastoma cell line had significantly reduced levels of uPAR, uPA enzymatic activity and immunoreactivity for these proteins when compared to controls. The Ad-uPAR-uPA infected cells showed a markedly lower level of invasion in the Matrigel invasion assays, and their spheroids failed to invade the fetal rat brain aggregates in the coculture system. Intracranial injection of SNB19 cells with the Ad-uPAR-uPA antisense hicistronic construct showed inhibited invasiveness and tumorigenicity. Subcutaneous injections of hicistronic antisense constructs into established tumors (U87 MG) caused regression of those tumors. Our results support the therapeutic potential of targeting the individual components of the uPAR-uPA system by using a single adenovirus construct for the treatment of glioma and other invasive cancers.

Original languageEnglish (US)
Pages (from-to)5967-5975
Number of pages9
JournalOncogene
Volume22
Issue number38
DOIs
StatePublished - Sep 4 2003

Keywords

  • Adenovirus
  • Antisense
  • Glioma
  • Invasion
  • UPA and uPAR

ASJC Scopus subject areas

  • Molecular Biology
  • Genetics
  • Cancer Research

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