Delayed selective motor neuron death and Fas antigen induction after spinal cord ischemia in rabbits

Masahiro Sakurai, Takeshi Hayashi, Koji Abe, Mitsuaki Sadahiro, Koichi Tabayashi

Research output: Contribution to journalArticle

54 Citations (Scopus)

Abstract

The mechanism of spinal cord injury has been thought to be related with tissue ischemia, and spinal motor neuron cells are suggested to be vulnerable to ischemia. To evaluate the mechanism of such vulnerability of motor neurons, we attempted to make a reproducible model for spinal cord ischemia. Using this model, cell damage was histologically analyzed. Detection of ladders of oligonucleosomal DNA fragment was investigated with gel electrophoresis up to 7 days of the reperfusion. Time course expression of Fas antigen, identified as a apoptosis-regulating molecules, was also assessed in rabbit spinal cord following transient ischemia. Spinal cord sections from animals sacrificed at 8 h, 1 day, 2 days, and 7 days following 15-min ischemia were immunohistochemically evaluated using monoclonal antibodies for Fas antigen. Following 15-min ischemia, the majority of motor neuron showed selective cell death at 7 days of reperfusion. Typical ladders of oligonucleosomal DNA fragments were detected at 2 days of reperfusion. Immunoreactivity of Fas antigen were induced at 8 h to 1 day of reperfusion selectively in motor neuron cells. The expression of Fas antigen may be related to the activation of apoptosis signal in motor neuron cells after spinal cord ischemia in rabbits.

Original languageEnglish
Pages (from-to)23-28
Number of pages6
JournalBrain Research
Volume797
Issue number1
DOIs
Publication statusPublished - Jun 22 1998
Externally publishedYes

Keywords

  • DNA fragmentation
  • Fas antigen
  • Motor neuron death
  • Spinal cord ischemia

ASJC Scopus subject areas

  • Neuroscience(all)
  • Molecular Biology
  • Clinical Neurology
  • Developmental Biology

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