Matrix metalloproteinase 9 inhibition reduces early brain injury in cortex after subarachnoid hemorrhage

Zong Duo Guo, Xiao Dong Zhang, Hai Tao Wu, Bin Lin, Xiao Chuan Sun, John H. Zhang

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This study investigated the role of matrix metalloproteinase-9 (MMP-9) in early brain injury (EBI) after subarachnoid hemorrhage (SAH). Sprague-Dawley male rats (n=30) between 250 and 300g were used. SAH was produced by injecting autologous arterial blood into the prechiasmatic cistern. SB-3CT, a selective MMP-9 inhibitor, was injected intraperitoneally after SAH induction. MMP-9 protein expression was measured by western blot; laminin expression and neuronal cells in the cerebral cortex were studied by immunohistochemistry and TUNEL staining at 24h after SAH. MMP-9 expression was increased after SAH and decreased by SB-3CT inhibition at 24h after SAH (P < 0.01). Laminin, the substrate of MMP-9, was decreased at 24h after SAH, and SB-3CT prevented laminin degradation. The number of TUNEL-positive neurons in cerebral cortex was increased after SAH and decreased by SB-3CT (P<0.01). MMP-9 may be involved in EBI after SAH and inhibition of MMP-9 may reduce EBI in cerebral cortex.

Original languageEnglish
Title of host publicationEarly Brain Injury or Cerebral Vasospasm
Subtitle of host publicationVolume 1: Pathophysiology
PublisherSpringer-Verlag Wien
Pages81-84
Number of pages4
ISBN (Print)9783709103524
DOIs
StatePublished - 2011

Publication series

NameActa Neurochirurgica, Supplementum
Volume110
ISSN (Print)0065-1419
ISSN (Electronic)0001-6268

ASJC Scopus Subject Areas

  • Surgery
  • Clinical Neurology

Keywords

  • Cell death
  • Early brain injury
  • Matrix metalloproteinase-9
  • Subarachnoid hemorrhage

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