Journal of Korean Neurosurgical Society

The Korean Neurosurgical Society (대한신경외과학회)
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Prior Use of 3-Hydroxy-3-Methyl-Glutaryl-Coenzyme A Reductase Inhibitor, Simvastatin Fails to Improve Outcome after Experimental Intracerebral Hemorrhage

  • Jwa, Cheol-Su (Department of Neurosurgery, National Medical Center) ;
  • Yi, Hyeong-Joong (Department of Neurosurgery, Hanyang University Medical Center) ;
  • Oh, Suck-Jun (Department of Neurosurgery, Hanyang University Medical Center) ;
  • Hwang, Se-Jin (Department of Anatomy and Cell Biology, College of Medicine, Hanyang University)
  • Received : 2011.04.26
  • Accepted : 2011.11.21
  • Published : 2011.11.28
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Abstract

Objective : Contrary to some clinical belief, there were quite a few studies regarding animal models of intracerebral hemorrhage (ICH) $in$ $vivo$ suggesting that prior use of statins may improve outcome after ICH. This study reports the effect of 3-hydroxy-3-methyl-glutaryl-coenzyme A (HMG CoA) reductase inhibitor, simvastatin given before experimental ICH. Methods : Fifty-one rats were subjected to collagenase-induced ICH, subdivided in 3 groups according to simvastatin treatment modality, and behavioral tests were done. Hematoma volume, brain water content and hemispheric atrophy were analyzed. Immunohistochemical staining for microglia (OX-42) and endothelial nitric oxide synthase (eNOS) was performed and caspase-3 activity was also measured. Results : Pre-simvastatin therapy decreased inflammatory reaction and perihematomal cell death, but resulted in no significant reduction of brain edema and no eNOS expression in the perihematomal region. Finally, prior use of simvastatin showed less significant improvement of neurological outcome after experimental ICH when compared to post-simvastatin therapy. Conclusion : The present study suggests that statins therapy after ICH improves neurological outcome, but prior use of statins before ICH might provide only histological improvement, providing no significant impact on neurological outcome against ICH.

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References

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