Mechanism of plasminogen activator inhibitor-1 regulation by oncostatin M and interleukin-1 in human astrocytes

Aneta Kasza, Daniel L. Kiss, Sunita Gopalan, Weili Xu, Russell E. Rydel, Aleksander Koj, Tomasz Kordula

Research output: Contribution to journalArticlepeer-review

32 Scopus citations


Glial cells that produce and respond to various cytokines mediate inflammatory processes in the brain. Here, we show that oncostatin M (OSM) and interleukin-1 (IL-1) regulate the expression of plasminogen activator inhibitor-1 (PAI-1) and urokinase-type plasminogen activator (uPA) in human astrocytes. Using the PAI-1 reporter constructs we show that the -58 to -51 proximal element mediates activation by both cytokines. This element is already bound by c-fos/c-jun heterodimers in unstimulated astrocytes, and treatment with cytokine strongly stimulates both expression of c-fos and binding of c-fos/c-jun heterodimers. In addition, IL-1 activates an inhibitory mechanism that down-regulates PAI-1 expression after longer exposure to this cytokine. Overexpression of dominant-negative signal transducer and activator of transcription-1 (STAT1), STAT3, STAT5 and inhibitor of nuclear factor-κB (IκB) suppressed OSM/IL-1-induced expression of the PAI-1 reporter construct. We conclude that OSM and IL-1 regulate the PAI-1 gene expression via up-regulating c-fos levels and subsequent binding of c-fos/c-jun heterodimers to the proximal element of the PAI-1 gene.

Original languageEnglish (US)
Pages (from-to)696-703
Number of pages8
JournalJournal of Neurochemistry
Issue number3
StatePublished - Nov 2002


  • Astrocytes
  • C-fos
  • Inflammation
  • Interleukin-1
  • Oncostatin M
  • PAI-1

ASJC Scopus subject areas

  • Biochemistry
  • Cellular and Molecular Neuroscience


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