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Thrombin Preconditioning in Surgical Brain Injury in Rats

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Brain Edema XVI

Part of the book series: Acta Neurochirurgica Supplement ((NEUROCHIRURGICA,volume 121))

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Abstract

The surgical brain injury model replicates neurosurgical brain parenchymal damage. Postsurgical brain edema correlates with postoperative neurological dysfunction. Intranasal administration is a proven method of delivering therapies to brain tissue. Thrombin preconditioning decreased brain edema and improved neurological outcomes in models of ischemic brain injury. We hypothesized thrombin preconditioning in surgical brain injury may improve postoperative brain edema and neurological outcomes. Adult male Sprague-Dawley rats (n = 78) weighing 285–355 g were randomly assigned to sham or pre-injury treatment: one-time pretreatment 1 day prior, one-time pretreatment 5 days prior, and daily preconditioning for 5 days prior. Treatment arms were divided into vehicle or thrombin therapies, and subdivided into intranasal (thrombin 5 units/50 μL 0.9 % saline) or intracerebral ventricular (thrombin 0.1 unit/10 μL 0.9 % saline) administration. Blinded observers performed neurological testing 24 h after brain injury followed immediately by measurement of brain water content. There was a significant difference in ipsilateral brain water content and neurological outcomes between all treatment groups and the sham group. However, there was no change in brain water content or neurological outcomes between thrombin- and vehicle-treated animals. Thrombin preconditioning did not significantly improve brain edema or neurological function in surgical brain injury in rats.

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Disclosure

This study was supported in part by National Institutes of Health grant NS084921. All authors attest they have no conflicts of interest to disclose.

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Correspondence to Richard L. Applegate II MD .

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Benggon, M., Chen, H., Applegate, R.L., Zhang, J. (2016). Thrombin Preconditioning in Surgical Brain Injury in Rats. In: Applegate, R., Chen, G., Feng, H., Zhang, J. (eds) Brain Edema XVI. Acta Neurochirurgica Supplement, vol 121. Springer, Cham. https://doi.org/10.1007/978-3-319-18497-5_52

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  • DOI: https://doi.org/10.1007/978-3-319-18497-5_52

  • Publisher Name: Springer, Cham

  • Print ISBN: 978-3-319-18496-8

  • Online ISBN: 978-3-319-18497-5

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