Chapter title |
Valproic Acid Pretreatment Reduces Brain Edema in a Rat Model of Surgical Brain Injury
|
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Chapter number | 53 |
Book title |
Brain Edema XVI
|
Published in |
Acta neurochirurgica Supplement, January 2016
|
DOI | 10.1007/978-3-319-18497-5_53 |
Pubmed ID | |
Book ISBNs |
978-3-31-918496-8, 978-3-31-918497-5
|
Authors |
Lei Huang, Wendy Woo, Prativa Sherchan, Nikan H. Khatibi, Paul Krafft, William Rolland, Richard L. Applegate, Robert D. Martin, John Zhang |
Abstract |
Surgically induced brain injury (SBI) results in brain edema and neurological decline. Valproic acid (VA) has been shown to be neuroprotective in several experimental brain diseases. In this study, we investigated the pretreatment effect of VA in a rat model of SBI. A total of 57 male Sprague-Dawley rats were use in four groups: sham, SBI + vehicle, SBI + low dose (100 mg/kg) VA, and SBI + high dose (300 mg/kg) VA. SBI was induced by partially resecting right frontal lobes. Shams underwent identical surgical procedures without brain resection. VA or vehicle was administered subcutaneously 30 min prior to SBI. At 24 and 72 h post SBI, neurobehavior and brain water content were assessed as well as matrix metalloproteinases (MMPs) activities. There was significantly higher brain water content within the right frontal lobe in SBI rats than in shams. Without neurobehavioral improvements, the low-dose but not high-dose VA significantly reduced brain edema at 24 h post SBI. The protection tends to persist to 72 h post SBI. At 24 h post SBI, low-dose VA did not significantly reduce the elevated MMP-9 activity associated with SBI. In conclusion, VA pretreatment attenuated brain edema at 24 h after SBI but lacked MMP inhibition. The single dose VA was not associated with neurobehavioral benefits. |
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