Contribution of polyamine oxidase to brain injury after trauma

Aclan Doǧan, A. Muralikrishna Rao, Muştafa K. Baskaya, James Hatcher, Cuneyt Temiz, V. L.Raghavendra Rao, Robert J. Dempsey

Research output: Contribution to journalArticle

41 Scopus citations

Abstract

Object. The possible role of the polyamine interconversion pathway on edema formation, traumatic injury volume, and tissue polyamine levels after traumatic brain injury (TBI) was studied using an inhibitor of the interconversion pathway enzyme, polyamine oxidase. Methods. Experimental TBI was induced in Sprague-Dawley rats by using a controlled cortical impact device at a velocity of 3 m/second, resulting in a 2-mm deformation. Immediately after TBI was induced, 100 mg/kg of N',N'-bis(2,3-butadienyl)- 1,4-butanediamine 2HCl (MDL 72527) or saline was injected intraperitoneally. Brain water content and tissue polyamine levels were measured at 24 hours after TBI. Traumatic injury volume was evaluated using 2% cresyl violet solution 7 days after TBI occurred. The MDL 72527 treatment significantly reduced brain edema (80.4 ± 0.8% compared with 81.2 ± 1.2%, p < 0.05) and injury volume (30.1 ± 6.6 mm3 compared with 42.7 ± 13.3 mm3, p < 0.05) compared with the saline treatment. The TBI caused a significant increase in tissue putrescine levels at the traumatized site (65.5 ± 26.5 pmol/g in the cortex and 70.9 ± 22.4 pmol/g in the hippocampus) compared with the nontraumatized site (7 ± 2.4 pmol/g in the cortex and 11.4 ± 6.4 pmol/g in the hippocampus). The increase in putrescine levels in both the traumatized and nontraumatized cortex and hippocampus was reduced by a mean of 60% with MDL 72527 treatment. Conclusions. These results demonstrate, for the first time, that the polyamine interconversion pathway has an important role in the increase of putrescine levels after TBI and that the polyamine oxidase inhibitors, blockers of the interconversion pathway, can be neuroprotective against edema formation and necrotic cavitation after TBI.

Original languageEnglish (US)
Pages (from-to)1078-1082
Number of pages5
JournalJournal of neurosurgery
Volume90
Issue number6
DOIs
StatePublished - Jun 1999
Externally publishedYes

Keywords

  • Cerebral edema
  • Cerebral ischemia
  • Interconversion pathway
  • N,N- bis(2,3-butadienyl)-1,4-butanediamine 2HCl
  • Polyamine oxidase
  • Rat

ASJC Scopus subject areas

  • Surgery
  • Clinical Neurology

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    Doǧan, A., Rao, A. M., Baskaya, M. K., Hatcher, J., Temiz, C., Rao, V. L. R., & Dempsey, R. J. (1999). Contribution of polyamine oxidase to brain injury after trauma. Journal of neurosurgery, 90(6), 1078-1082. https://doi.org/10.3171/jns.1999.90.6.1078