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Inducible Ornithine Decarboxylase Expression in Brain Subject to Vasogenic Oedema After Transient Ischaemia: Relationship to C-fos Gene Expression

  • R. J. Dempsey
  • J. M. Carney
  • M. S. Kindy
Conference paper
Part of the Acta Neurochirurgica book series (NEUROCHIRURGICA, volume 51)

Summary

Ornithine Decarboxylase (ODC) is the rat controlling enzyme of polyamine biosynthesis and has been shown to be produced in a delayed fashion in response to cerebral ischaemia. Its appearance has been linked to the development of vasogenic brain oedema. To understand the genetic control of this protein, Mongolian gerbils were studied for the possible expression of the ODC gene as compared to that of the inducible proto oncogenes c-fos and c-jun after transient bilateral carotid artery occlusion.

Total cellular RNA was isolated from gerbil brains by guanidinethiocyanate extraction and characterized by northern blot analysis for c-fos, c-jun, and ODC mRNA over reperfusion times. c-fos and c-jun expression rose rapidly with peak level reached at 60 min of reperfusion (70 × control, p ≤ 0.01). Peak levels of ODC mRNA induction were seen at 4hrs reperfusion (2.83 × control, p ≤ 0.01) consistent with the period of maximum of brain oedema as measured by specific gravity (1.0386 ± 0.0009, p ≤ 0.05). These data indicate the differential timing of genetic expression during the reperfusion period after transient ischaemia. Such studies suggest that potential therapies may be possible by addressing the delayed ODC component of ischaemic oedema formation and allow a greater understanding of the role of gene induction in the multifaceted cerebral response to ischaemia.

Keywords

Cerebral Ischaemia Brain Oedema Ornithine Decarboxylase Vasogenic Oedema Mongolian Gerbil 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag 1990

Authors and Affiliations

  • R. J. Dempsey
    • 1
  • J. M. Carney
    • 1
  • M. S. Kindy
    • 1
  1. 1.University of Kentucky Medical Center and Veterans Administration HospitalLexingtonUSA

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